/* ===== CUALESMIIP.AR - DARK THEME STYLES ===== */

/* CSS Variables - Speedtest Style */
:root {
    /* Speedtest Color Palette */
    --primary-dark: #141c2e;
    --secondary-dark: #1a2332;
    --tertiary-dark: #202938;
    --accent-cyan: #00d4ff;
    --accent-teal: #00c4a7;
    --accent-purple: #6366f1;
    --text-primary: #ffffff;
    --text-secondary: #a1a8b8;
    --text-muted: #6b7280;
    --border-subtle: rgba(255, 255, 255, 0.1);
    --border-medium: rgba(255, 255, 255, 0.15);
    --border-strong: rgba(255, 255, 255, 0.2);
    
    /* Background Gradients */
    --bg-primary: #141c2e;
    --bg-secondary: #1a2332;
    --bg-gradient: linear-gradient(135deg, #141c2e 0%, #1a2332 50%, #202938 100%);
    --bg-card: rgba(26, 35, 50, 0.8);
    --bg-card-hover: rgba(26, 35, 50, 1);
    
    /* Accent Colors */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #3b82f6;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 50%;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.3);
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s ease;
    --transition-slow: all 0.5s ease;
    
    /* Legacy Variables for Compatibility */
    --bg: #141c2e;
    --panel: #1a2332;
    --card: #202938;
    --txt: #ffffff;
    --muted: #a1a8b8;
    --cyan: #00d4ff;
    --green: #00c4a7;
    --red: #ef4444;
    --orange: #f59e0b;
    --border: rgba(255, 255, 255, 0.15);
    
    /* Compatibility Variables */
    --primary-color: #00d4ff;
    --primary-light: #38bdf8;
    --primary-dark: #0284c7;
    --secondary-color: #00c4a7;
    --accent-color: #6366f1;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --text-light: #6b7280;
    --bg-tertiary: #202938;
    --bg-input: #202938;
    --border-color: rgba(255, 255, 255, 0.15);
    --border-light: rgba(255, 255, 255, 0.1);
    --border-dark: #1a2332;
    --shadow: 0 4px 12px rgba(0,0,0,0.4);
    --gradient-primary: linear-gradient(135deg, var(--cyan), var(--green));
    --gradient-bg: linear-gradient(135deg, var(--bg) 0%, #1a2332 100%);
    --glow-cyan: rgba(0, 212, 255, 0.3);
    --glow-green: rgba(0, 196, 167, 0.3);
    --ad-bg: #1a2332;
    --ad-border: rgba(255, 255, 255, 0.15);
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-gradient);
    margin: 0;
    padding: 0;
    padding-top: 40px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-weight: 400;
    letter-spacing: 0.01em;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    position: relative;
}

/* ===== LOADING OVERLAY (DNS) ===== */
#loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
}

#loading-overlay.hidden { display: none; }

#loading-overlay .overlay-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(20, 28, 46, 0.75);
    backdrop-filter: blur(2px);
}

#loading-overlay .overlay-content {
    position: relative;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px 28px;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 12px;
}

#loading-overlay .overlay-text {
    font-size: 1rem;
    color: var(--text-primary);
}

#loading-overlay .overlay-spinner {
    width: 22px;
    height: 22px;
    border: 3px solid rgba(255,255,255,0.25);
    border-top-color: var(--accent-cyan);
    border-radius: 50%;
    animation: spin 0.9s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 80%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(0, 196, 167, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(99, 102, 241, 0.05) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

/* ===== NAVIGATION ===== */
.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    height: 40px;
}

.nav-brand {
    display: flex;
    flex-direction: column;
}

.brand-title {
    font-size: 1.4rem;
    font-weight: 800;
    background: linear-gradient(45deg, var(--cyan), var(--green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
    line-height: 1;
    text-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
    letter-spacing: -0.5px;
}

.brand-subtitle {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

.nav-menu {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--primary-color);
    background-color: var(--bg-secondary);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--primary-color);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===== TOOL FORM ENHANCEMENTS ===== */
.input-count {
    width: 110px;
    margin-left: 12px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 10px 12px;
    border-radius: var(--radius-md);
}

.input-count::-webkit-outer-spin-button,
.input-count::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.input-count {
    -moz-appearance: textfield;
}

/* ===== METRICS GRID ===== */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
    margin: 14px 0 10px;
}

/* ===== ARTICLE CARD (Tool Guides) ===== */
.article-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow-md);
}

.article-card .card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
}

.article-card .card-icon {
    font-size: 1.25rem;
}

.article-card .card-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
}

.article-card .card-content {
    color: var(--text-secondary);
}

.article-card .card-list {
    list-style: none;
    margin: 10px 0 0;
    padding: 0;
}

.article-card .card-list li {
    padding: 6px 0;
    border-bottom: 1px dashed var(--border-light);
}

.article-card .card-list li:last-child {
    border-bottom: none;
}

.article-card .tip {
    margin-top: 12px;
    background: rgba(99, 102, 241, 0.12);
    border: 1px solid rgba(99, 102, 241, 0.3);
    color: var(--text-primary);
    padding: 10px;
    border-radius: var(--radius-md);
}

.metric {
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 10px 12px;
}

.metric-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.metric-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* ===== RESULT PANEL IMPROVEMENTS ===== */
.result-panel {
    margin-top: 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 16px 16px 20px;
}

.result-panel h4 {
    margin: 0 0 10px;
    font-size: 1rem;
    color: var(--text-secondary);
}

.result-panel.success {
    border-color: rgba(16, 185, 129, 0.35);
}

.result-output {
    position: relative;
    background: var(--bg-tertiary);
    border: 1px dashed var(--border-light);
    padding: 14px 14px 24px;
    border-radius: var(--radius-md);
    overflow-x: auto;
    white-space: pre-wrap;
    line-height: 1.5;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

/* ===== HERO SECTION ===== */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 120px 0 80px;
    margin-top: 70px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    background: linear-gradient(45deg, #ffffff, #e2e8f0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.25rem;
    line-height: 1.6;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-stats {
    display: flex;
    gap: 2rem;
    margin-bottom: 2.5rem;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: #ffffff;
}

.stat-label {
    font-size: 0.875rem;
    opacity: 0.8;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.cta-primary, .cta-secondary {
    padding: 1rem 2rem;
    border-radius: var(--radius-lg);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.cta-primary {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.cta-primary:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.cta-secondary {
    background: transparent;
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.5);
}

.cta-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.network-animation {
    position: relative;
    width: 300px;
    height: 200px;
}

.node {
    position: absolute;
    width: 20px;
    height: 20px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.node:nth-child(1) { top: 50px; left: 50px; }
.node:nth-child(2) { top: 30px; right: 80px; }
.node:nth-child(3) { bottom: 40px; right: 50px; }

.connection {
    position: absolute;
    height: 2px;
    background: rgba(255, 255, 255, 0.4);
    animation: flow 3s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.6; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.2); }
}

@keyframes flow {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.8; }
}

/* ===== MAIN CONTAINER ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem; /* Solo padding lateral */
}

/* Contenedor ancho específico para DNS Checker */
.container-wide {
    max-width: 1165px; /* valor base */
}

/* Override específico de la página DNS Checker */
.dns-checker-page .container-wide {
    max-width: 1920px;
}

/* ===== MAIN CONTENT ===== */
.main-content {
    margin-top: 60px; /* Compensar la altura del navbar fijo */
    padding: 0; /* Sin padding */
    position: relative;
    top: -30px; /* Mover más hacia arriba para eliminar todo el espacio */
}

/* ===== DNS CHECKER LAYOUT ===== */
.dns-check-layout {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 18px;
    align-items: start;
    margin-top: 16px;
}

.dns-server-list {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 14px;
}

.dns-list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.dns-server-item {
    display: grid;
    grid-template-columns: 1fr auto auto;
    gap: 8px 16px;
    padding: 10px 8px;
    border-bottom: 1px dashed var(--border-light);
}
.dns-server-item:last-child { border-bottom: none; }
.dns-server-item .server-main { display: flex; justify-content: space-between; align-items: center; }
.dns-server-item .server-meta { display: flex; gap: 12px; align-items: center; color: var(--text-secondary); }
.dns-server-item .server-id .name { font-weight: 600; }
.dns-server-item.ok .status-dot { background: var(--success); }
.dns-server-item.fail .status-dot { background: var(--error); }
.dns-server-item.pending .status-dot { background: var(--warning); }
.dns-server-item .status-dot { width: 10px; height: 10px; border-radius: 50%; box-shadow: var(--shadow-sm); }

/* PTR answer highlight */
.resolved-answer.ptr-answer {
    color: var(--accent-cyan);
    text-shadow: 0 0 12px var(--glow-cyan);
}

.dns-list-legend { display: flex; gap: 12px; margin-top: 8px; color: var(--text-secondary); }
.legend-dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; margin-right: 6px; }
.legend-dot.ok { background: var(--success); }
.legend-dot.fail { background: var(--error); }
.legend-dot.pending { background: var(--warning); }

.dns-map-panel {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 14px;
}
.dns-map-panel .map-header { margin-bottom: 8px; }
.dns-map-panel .title { font-weight: 700; }
.dns-map-panel .subtitle { color: var(--text-secondary); font-size: 0.9rem; }

#dns-map.map-container {
    height: 420px;
    border: 1px dashed var(--border-light);
    border-radius: var(--radius-md);
    background: #0f172a;
}

/* Loading overlay for DNS queries */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}
.loading-overlay.hidden { display: none !important; }
.loading-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 16px 20px;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 12px;
}
.loading-box .label { font-weight: 600; color: var(--text-primary); }
.spinner {
    width: 22px;
    height: 22px;
    border: 3px solid rgba(255,255,255,0.25);
    border-top-color: var(--accent-cyan);
    border-radius: 50%;
    animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.ad-banner-inline, .adsense-under-map { margin: 10px 0; }
.ad-placeholder { background: var(--ad-bg); border: 1px dashed var(--ad-border); padding: 14px; border-radius: var(--radius-md); color: var(--text-secondary); }

/* ===== AI EXPLANATION BOX ===== */
.ai-explain-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 12px 14px;
    box-shadow: var(--shadow-sm);
}
.ai-explain-title { font-weight: 700; color: var(--text-primary); margin-bottom: 6px; }
.ai-explain-content { color: var(--text-secondary); white-space: pre-wrap; line-height: 1.5; }

/* ===== AD BANNER ===== */
.ad-banner-top {
    margin: 0; /* Sin margen */
    padding: 0; /* Sin padding */
    border: 0; /* Sin borde */
}

.ad-banner-top .container {
    margin: 0 auto; /* Solo centrado horizontal */
    padding: 0 2rem; /* Solo padding lateral */
}

.ad-banner-top .adsense-container {
    margin: 0; /* Sin margen */
    padding: 0; /* Sin padding */
}

/* ===== IP SECTION ===== */
.ip-display-main {
    text-align: center;
    margin: 40px auto 60px;
    max-width: 800px;
    padding: 0 20px;
}

.ip-page-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    text-shadow: 0 0 16px var(--glow-cyan);
}

.ip-main-value {
    font-size: 4rem;
    font-weight: 800;
    color: var(--accent-cyan);
    letter-spacing: 0.02em;
    line-height: 1.2;
    text-align: center;
    margin: 20px 0 40px;
    text-shadow: 0 0 24px var(--glow-cyan);
}

.ip-details {
    margin-top: 60px;
}

.ip-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
    max-width: 900px;
    margin: 0 auto;
}

.ip-card {
    background: var(--bg-secondary);
    border-radius: 16px;
    padding: 28px 24px;
    text-align: center;
    border: 2px solid var(--border-primary);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(20px);
    box-shadow: 
        0 8px 32px rgba(0, 0, 0, 0.2),
        0 4px 16px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.ip-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-teal));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.ip-card:hover {
    transform: translateY(-8px);
    box-shadow: 
        0 20px 60px rgba(0, 0, 0, 0.3),
        0 8px 25px rgba(0, 0, 0, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.15);
    border-color: var(--accent-cyan);
}

.ip-card:hover::before {
    opacity: 1;
}

/* Etiquetas de las cajas IP - mismo estilo que h2 */
.ip-label {
    font-size: 1.5rem !important;
    font-weight: 500 !important;
    color: var(--text-secondary) !important;
    letter-spacing: 0.02em !important;
    text-transform: uppercase !important;
    margin-bottom: 12px !important;
    opacity: 0.8 !important;
}

.ip-value {
    font-size: 1rem;
    font-weight: 600;
    color: #ffffff !important;
    line-height: 1.4;
    word-break: break-all;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
    font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
}

.ip-value .error {
    color: var(--error);
    opacity: 0.9;
    font-style: italic;
    font-size: 0.8rem;
}

/* ===== INFORMACIÓN ADICIONAL DE IP ===== */
.ip-additional-info {
    padding: 4rem 0;
    background: var(--bg-primary);
}

.info-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

/* ===== FOOTER ===== */
.footer {
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    margin-top: 2rem;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 2rem;
}

.footer-section h3,
.footer-section h4 {
    font-size: 1rem;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    font-weight: 700;
}

.footer-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-section li {
    margin: 0.4rem 0;
}

.footer-section a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.footer-section a:hover {
    color: var(--primary-color);
    text-shadow: var(--shadow-glow);
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    margin-top: 1.5rem;
    padding-top: 1rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-bottom a {
    color: var(--primary-color);
    text-decoration: none;
}

.footer-bottom a:hover {
    color: var(--secondary-color);
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

/* ===== DNS CHECKER (Layout y estilos) ===== */
.content-layout-wide {
    display: block; /* En esta página no hay sidebars */
}

.dns-search-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: linear-gradient(135deg, rgba(26,35,50,0.9), rgba(32,41,56,0.95));
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    box-shadow: 0 8px 24px rgba(0,0,0,0.35), 0 0 0 3px rgba(0,212,255,0.08);
    position: sticky;
    top: 56px;
    z-index: 900;
}

.dns-input {
    flex: 1 1 420px;
    padding: 14px 16px;
    background: var(--bg-input);
    border: 2px solid rgba(0, 212, 255, 0.35);
    color: var(--text-primary);
    border-radius: var(--radius-lg);
    outline: none;
    font-size: 1.05rem;
    letter-spacing: 0.02em;
    box-shadow: inset 0 0 0 1px rgba(255,255,255,0.05), 0 0 14px rgba(0,212,255,0.15);
    transition: var(--transition);
}
.dns-input:focus {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 18px var(--glow-cyan);
}
.dns-input.highlight {
    border-color: var(--accent-teal);
    box-shadow: 0 0 24px var(--glow-green);
}

.dns-select {
    padding: 12px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: var(--radius-md);
    min-width: 120px;
}

.btn.btn-primary.btn-start {
    padding: 12px 18px;
    background: linear-gradient(135deg, var(--cyan), var(--green));
    color: #0b1220;
    font-weight: 800;
    letter-spacing: 0.02em;
    border: none;
    border-radius: 999px;
    box-shadow: 0 8px 18px rgba(0,212,255,0.35);
    transition: var(--transition);
}
.btn.btn-primary.btn-start:hover {
    transform: translateY(-1px);
    box-shadow: 0 12px 24px rgba(0,212,255,0.5);
    background: linear-gradient(135deg, var(--cyan), var(--green)); /* mantener gradiente */
    color: #0b1220; /* mantener color de texto */
    filter: none; /* evitar filtros que oscurezcan */
}
.btn.btn-primary.btn-start:active {
    transform: translateY(0);
}

.auto-refresh {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--border-light);
}
.auto-refresh-input {
    width: 64px;
    margin-left: 8px;
    padding: 6px 8px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: var(--radius-md);
    text-align: center;
    font-weight: 700;
    line-height: 1;
}
.auto-refresh-input:focus {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 3px rgba(0,212,255,0.14);
    outline: none;
}
/* Keep number input minimal look across browsers */
.auto-refresh-input::-webkit-outer-spin-button,
.auto-refresh-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}
.auto-refresh-input {
    -moz-appearance: textfield;
}
.auto-refresh-msg { margin-left: 8px; color: var(--warning); font-weight: 600; }
.dns-search-bar {
    display: flex;
    gap: 12px;
    align-items: center;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 12px;
    margin: 8px 0 16px;
}

.dns-input, .dns-select {
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: var(--radius-md);
    padding: 10px 12px;
}

.dns-input { flex: 1; }
.dns-select { min-width: 120px; }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 16px;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    border: 1px solid transparent;
    transition: var(--transition);
}
.btn-primary {
    background: var(--gradient-primary);
    color: var(--text-primary);
    border-color: rgba(255,255,255,0.2);
}
.btn-primary:hover { filter: brightness(1.05); }
.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-color: var(--border-color);
}
.btn-secondary:hover { background: var(--bg-card); }
.btn-small { padding: 8px 12px; font-size: 0.9rem; }

.visually-hidden {
    position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
    overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ===== Panel avanzado DNS (plegable) ===== */
.dns-advanced-panel {
    display: none; /* visible cuando se quita [hidden] por JS */
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 12px;
    margin: 8px 0;
}
.dns-advanced-panel[hidden] { display: none; }
.dns-advanced-panel .field-group { display: grid; grid-template-columns: 1fr; gap: 6px; margin-bottom: 8px; }
.dns-advanced-panel .field-label { font-weight: 600; color: var(--text-primary); display: flex; align-items: center; gap: 6px; }
.dns-advanced-panel .field-control { display: block; }
.dns-search-bar #dns-advanced-toggle { margin-left: 6px; }

.dns-check-layout {
    display: grid;
    grid-template-columns: 700px 1fr;
    gap: 32px;
    align-items: start;
}

.dns-server-list {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.dns-list-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 14px;
    border-bottom: 1px solid var(--border-light);
}
.dns-list-header .title { font-weight: 700; color: var(--text-primary); }
.dns-list-header .actions { display: flex; gap: 8px; }

.dns-server-item {
    display: grid;
    grid-template-columns: 1fr 28px;
    gap: 6px;
    padding: 10px 14px;
    border-bottom: 1px solid var(--border-light);
}
.dns-server-item:last-child { border-bottom: none; }
.dns-server-item .server-main {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}
.dns-server-item .server-id { display: inline-flex; align-items: center; gap: 8px; }
.dns-server-item .flag { font-size: 1.1rem; }
.dns-server-item .name { font-weight: 600; color: var(--text-primary); }
.dns-server-item .server-result { color: var(--text-primary); }
.dns-server-item .server-meta {
    grid-column: 1 / span 1;
    display: flex;
    gap: 10px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 6px;
}
.dns-server-item .provider-ip { opacity: 0.8; }

.status-dot {
    width: 22px; height: 22px; border-radius: var(--radius-full);
    display: inline-flex; align-items: center; justify-content: center;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    font-size: 0.9rem; line-height: 1; user-select: none;
}
.dns-server-item.ok .status-dot { color: var(--success); }
.dns-server-item.fail .status-dot { color: var(--error); }
.dns-server-item.pending .status-dot { color: var(--text-muted); }
.dns-server-item.mismatch .status-dot { color: var(--info); }
.dns-server-item.ok .status-dot::after { content: '✓'; }
.dns-server-item.fail .status-dot::after { content: '✕'; }
.dns-server-item.pending .status-dot::after { content: '…'; }
.dns-server-item.mismatch .status-dot::after { content: '!'; }

.dns-list-legend {
    display: flex;
    gap: 12px;
    align-items: center;
    padding: 10px 14px;
    color: var(--text-secondary);
}
.legend-dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; margin-right: 6px; }
.legend-dot.ok { background: var(--success); }
.legend-dot.fail { background: var(--error); }
.legend-dot.pending { background: var(--text-muted); }
.legend-dot.mismatch { background: var(--info); }

.dns-map-panel {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
}
.map-header { padding: 12px 14px; border-bottom: 1px solid var(--border-light); }
.map-header .title { font-weight: 700; color: var(--text-primary); }
.map-header .subtitle { color: var(--text-secondary); font-size: 0.9rem; }

.ad-banner-inline { padding: 8px 14px; border-bottom: 1px dashed var(--border-light); }

.map-container {
    width: 100%;
    max-width: none;
    height: 479px;
    background: url('../img/world-map.svg') center/contain no-repeat, #0b1220; /* fondo oscuro + mapa base (fallback) */
    border-top: 1px solid var(--border-light);
    position: relative;
}

.map-legend {
    display: flex;
    gap: 16px;
    padding: 10px 14px;
    border-top: 1px solid var(--border-light);
    color: var(--text-secondary);
}
.map-legend .legend-item { display: inline-flex; align-items: center; gap: 8px; }

/* Fallback markers (si Leaflet no carga) */
.map-marker {
    position: absolute;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    box-shadow: 0 0 8px rgba(0,0,0,0.3);
}
.map-marker.ok { background: var(--success); }
.map-marker.fail { background: var(--error); }
.map-marker.pending { background: var(--warning); }

.mono {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

@media (max-width: 1024px) {
    .dns-check-layout { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .footer-content {
        grid-template-columns: 1fr;
    }
}

.info-card-modern {
    background: rgba(37, 42, 58, 0.6);
    border: 1px solid rgba(45, 55, 72, 0.8);
    border-radius: 16px;
    padding: 2rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.info-card-modern::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--cyan), var(--green));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.info-card-modern:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3), 0 0 20px rgba(0, 212, 255, 0.1);
}

.info-card-modern:hover::before {
    opacity: 1;
}

.info-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    display: block;
    text-align: center;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}

.info-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
    text-align: center;
    line-height: 1.3;
}

.info-content p {
    color: var(--text-secondary);
    line-height: 1.6;
    text-align: center;
    font-size: 0.95rem;
    opacity: 0.9;
}

/* ===== CONTAINER ADJUSTMENTS ===== */
.main-content > .container {
    padding-top: 0; /* Sin padding superior */
    margin-top: 0; /* Sin margen superior */
    position: relative;
    top: -20px; /* Mover hacia arriba para eliminar espacio con banner */
}

.content-layout {
    margin-top: 0; /* Sin margen superior */
    padding-top: 0; /* Sin padding superior */
}

/* ===== ELIMINAR ESPACIOS ADICIONALES ===== */
.ad-placeholder {
    margin: 0; /* Sin margen */
    padding: 10px; /* Padding mínimo interno */
}

.main-column {
    padding-top: 0; /* Sin padding superior */
    margin-top: 0; /* Sin margen superior */
}

/* ===== SECTION HEADERS ===== */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--secondary-color), var(--accent-color));
    border-radius: 2px;
}

.section-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* ===== TOOLS SECTION ===== */
.tools-section {
    padding: 5rem 0;
    background: var(--bg-secondary);
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.tool-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    border: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--secondary-color), var(--accent-color));
}

.tool-card.featured::before {
    height: 6px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.tool-card:hover {
    /* Sin movimiento para evitar mareo */
    transform: none;
    box-shadow: var(--shadow-xl);
}

.tool-icon {
    width: 60px;
    height: 60px;
    margin-bottom: 1.5rem;
    color: var(--secondary-color);
}

.tool-icon svg {
    width: 100%;
    height: 100%;
}

.tool-content {
    margin-bottom: 2rem;
}

.tool-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.tool-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.tool-features {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.feature-tag {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
}

.tool-form {
    background: rgba(30, 41, 59, 0.8);
    border: 1px solid var(--border-medium);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 2rem;
    backdrop-filter: blur(10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

/* Educational Content Styles */
.educational-content {
    margin: 4rem 0;
    padding: 0 1rem;
}

.educational-header {
    text-align: center;
    margin-bottom: 3rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.educational-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #60a5fa, #34d399);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.educational-intro {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.educational-intro p {
    color: var(--text-secondary);
    font-size: 1.125rem;
    line-height: 1.7;
    margin: 0;
}

.educational-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.educational-card {
    background: rgba(30, 41, 59, 0.8);
    border: 1px solid var(--border-medium);
    border-radius: 20px;
    padding: 2rem;
    backdrop-filter: blur(10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.educational-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #60a5fa, #34d399, #f59e0b);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.educational-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    border-color: var(--border-light);
}

.educational-card:hover::before {
    opacity: 1;
}

.card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-medium);
}

.card-icon {
    font-size: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: rgba(96, 165, 250, 0.1);
    border-radius: 16px;
    border: 1px solid rgba(96, 165, 250, 0.2);
}

.card-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    flex: 1;
}

.card-content {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.card-description {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
    margin: 0;
}

.card-features {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.feature-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 1rem;
    background: rgba(15, 23, 42, 0.6);
    border-radius: 12px;
    border: 1px solid var(--border-dark);
    transition: all 0.3s ease;
}

.feature-item:hover {
    background: rgba(15, 23, 42, 0.8);
    border-color: var(--border-medium);
}

.feature-label {
    font-weight: 600;
    color: var(--accent-primary);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.feature-value {
    color: var(--text-primary);
    font-size: 0.95rem;
    line-height: 1.5;
}

/* Responsive adjustments for educational content */
@media (max-width: 768px) {
    .educational-title {
        font-size: 2rem;
    }
    
    .educational-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .educational-card {
        padding: 1.5rem;
    }
    
    .card-header {
        flex-direction: column;
        text-align: center;
        gap: 0.75rem;
    }
    
    .card-icon {
        width: 50px;
        height: 50px;
        font-size: 2rem;
    }
}

.tool-form::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.tool-form:hover {
    background: rgba(30, 41, 59, 1);
    border-color: var(--border-medium);
    /* Evitar movimiento del contenedor */
    transform: none;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

.tool-form:hover::before {
    opacity: 1;
}

.input-group {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.input-group input {
    flex: 1;
    min-width: 200px;
    padding: 0.875rem 1rem;
    border: 2px solid rgba(45, 55, 72, 0.8);
    border-radius: 12px;
    font-size: 1rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: rgba(26, 31, 46, 0.8);
    color: var(--txt);
    backdrop-filter: blur(10px);
    position: relative;
}

.input-group input::placeholder {
    color: var(--muted);
    opacity: 0.7;
}

.input-group input:focus {
    outline: none;
    border-color: var(--cyan);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1), 0 0 20px rgba(0, 212, 255, 0.1);
    background: rgba(26, 31, 46, 1);
    transform: translateY(-1px);
}

.input-group input:hover:not(:focus) {
    border-color: rgba(0, 212, 255, 0.3);
}

.select-input {
    padding: 0.875rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    font-size: 1rem;
    transition: var(--transition);
}

/* ===== PING ADVANCED CONTROLS (Segmented UI) ===== */
.advanced-options { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 12px; padding: 12px; }
.advanced-options summary { cursor: pointer; color: var(--text-primary); font-weight: 600; }
.options-grid { display: grid; grid-template-columns: repeat(2, minmax(260px, 1fr)); gap: 16px 24px; align-items: start; }
.option-field { min-width: 0; }
.field-title { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 8px; font-weight: 600; }

.segmented-group { display: flex; flex-wrap: wrap; gap: 8px; }
.segmented-item { position: relative; }
.segmented-item input[type="radio"] { position: absolute; left: -9999px; opacity: 0; pointer-events: none; }
.segment-label { display: inline-block; padding: 8px 12px; border-radius: 10px; border: 1px solid var(--border-color); background: var(--bg-card); color: var(--text-primary); font-size: 0.9rem; cursor: pointer; transition: background-color .15s ease, border-color .15s ease, box-shadow .15s ease; }
.segment-label:hover { border-color: var(--accent-cyan); }
.segmented-item input:checked + .segment-label { border-color: var(--accent-cyan); box-shadow: 0 0 0 2px rgba(0, 212, 255, 0.15); }

/* Ayuda: icono y tooltip */
.help-icon { display: inline-flex; align-items: center; justify-content: center; width: 18px; height: 18px; margin-left: 6px; border-radius: 50%; border: 1px solid var(--border-color); background: var(--bg-card); color: var(--text-secondary); font-weight: 700; font-size: 12px; cursor: help; position: relative; }
.help-icon:hover { color: var(--primary-color); border-color: var(--primary-color); }
.help-icon:focus { outline: 2px solid rgba(0, 212, 255, 0.25); outline-offset: 2px; }
.help-icon::after { content: attr(data-tooltip); position: absolute; left: 50%; transform: translateX(-50%); bottom: calc(100% + 8px); background: var(--bg-card); color: var(--text-primary); border: 1px solid var(--border-color); border-radius: 8px; padding: 8px 10px; box-shadow: var(--shadow-md); white-space: normal; max-width: 300px; opacity: 0; pointer-events: none; transition: opacity .15s ease; z-index: 100; }
.help-icon:hover::after, .help-icon:focus::after { opacity: 1; }

@media (max-width: 768px) {
  .options-grid { grid-template-columns: 1fr; gap: 14px; }
}

.btn-primary, .btn-secondary {
    padding: 0.875rem 1.5rem;
    border: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--cyan), var(--green));
    color: white;
    border: 1px solid rgba(0, 212, 255, 0.3);
    box-shadow: 0 4px 15px rgba(0, 212, 255, 0.2);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 212, 255, 0.3);
    border-color: rgba(0, 212, 255, 0.5);
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:active {
    transform: translateY(-1px);
}

.btn-secondary {
    background: rgba(37, 42, 58, 0.8);
    color: var(--txt);
    border: 1px solid var(--border);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(37, 42, 58, 1);
    border-color: rgba(0, 212, 255, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

.btn-primary svg {
    width: 16px;
    height: 16px;
}

/* ===== RESULT CONTAINERS ===== */
.result-container {
    margin-top: 1.5rem;
    background: rgba(15, 23, 42, 0.9);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-medium);
    backdrop-filter: blur(10px);
    position: relative;
    transition: all 0.3s ease;
}

.result-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-green));
    border-radius: 12px 12px 0 0;
}

.result-container:hover {
    background: rgba(15, 23, 42, 1);
    border-color: var(--accent-cyan);
    box-shadow: 0 4px 20px rgba(34, 211, 238, 0.1);
}

.result-header {
    padding: 1rem 1.5rem;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.result-header h4 {
    margin: 0;
    color: var(--text-primary);
    font-weight: 600;
}

.result-timestamp {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.result-output {
    padding: 1.5rem;
    background: var(--bg-dark);
    color: #e2e8f0;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.875rem;
    line-height: 1.5;
    overflow-x: auto;
    margin: 0;
    white-space: pre-wrap;
}

/* Result panel for tool outputs (used by tools.php) */
.result-panel {
    margin-top: 1.25rem;
    background: rgba(15, 23, 42, 0.9);
    border: 1px solid var(--border-medium);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    padding: 1rem 1.25rem;
}

.result-panel h4 {
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    font-weight: 600;
}

.result-panel.success {
    border-left: 4px solid var(--accent-green);
}

.result-panel.error {
    border-left: 4px solid var(--accent-red);
}

.error {
    background: #fed7d7;
    color: #c53030;
    padding: 1rem;
    border-radius: var(--radius-md);
    border-left: 4px solid #f56565;
}

/* ===== IP INFO DISPLAY ===== */
.ip-info-display {
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.ip-detail {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-light);
}

.ip-detail:last-of-type {
    border-bottom: none;
    margin-bottom: 1rem;
}

.ip-label {
    font-weight: 600;
    color: var(--text-secondary);
}

.ip-value {
    font-family: monospace;
    color: var(--text-primary);
    font-weight: 500;
}

/* ===== ARTICLES SECTION ===== */
.articles-section {
    padding: 5rem 0;
    background: var(--bg-primary);
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.article-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--border-light);
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.featured-article {
    grid-column: span 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
}

.article-image {
    position: relative;
    overflow: hidden;
}

.article-svg {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.featured-article .article-svg {
    height: 100%;
    min-height: 300px;
}

.article-content {
    padding: 2rem;
}

.article-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.article-category {
    background: var(--secondary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
}

.article-date, .article-read-time {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.article-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    line-height: 1.3;
}

.featured-article .article-title {
    font-size: 1.75rem;
}

.article-excerpt {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.article-tags {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.tag {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
}

.article-link {
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.article-link:hover {
    color: var(--accent-color);
}

.articles-cta {
    text-align: center;
}

/* ===== AD SPACES ===== */
.ad-space {
    margin: 3rem auto;
    text-align: center;
}

.ad-placeholder {
    background: var(--bg-tertiary);
    border: 2px dashed var(--border-color);
    padding: 2rem;
    border-radius: var(--radius-lg);
    color: var(--text-muted);
    font-weight: 500;
}
/* ===== LEGAL PAGES STYLES ===== */
.privacy-content, .terms-content {
    margin: 2rem 0;
}
.privacy-section, .terms-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    margin: 1rem 0;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}
.privacy-section::before, .terms-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--cyan), var(--green));
    opacity: 0.6;
}
.privacy-section h2, .terms-section h2 {
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}
.privacy-section h3, .terms-section h3 {
    color: var(--text-secondary);
    margin: 0.75rem 0 0.5rem;
}
.privacy-section p, .privacy-section li,
.terms-section p, .terms-section li {
    color: var(--text-secondary);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .articles-grid {
        grid-template-columns: 1fr;
    }
    
    .featured-article {
        grid-column: span 1;
        grid-template-columns: 1fr;
    }
    
    .input-group {
        flex-direction: column;
    }
    
    .input-group input {
        min-width: auto;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .nav-container {
        padding: 0 1rem;
    }
    
    .container {
        padding: 0 1rem;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-description {
        font-size: 1.1rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 1rem;
    }
    
    .cta-primary, .cta-secondary {
        width: 100%;
        justify-content: center;
    }
}

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ===== DNS CHECKER WIDE LAYOUT (Image-based sizing) ===== */
/* Scope to the DNS Checker page to avoid side effects elsewhere */
.dns-checker-page .container-wide {
    max-width: 1680px; /* ampliar más el lienzo principal */
    margin: 0 auto;
    padding: 0 1rem;
}

.dns-checker-page .content-layout-wide {
    display: grid;
    grid-template-columns: 620px 1fr; /* ensanchar listado para evitar percepción de estrechez */
    gap: 32px; /* un poco más de aire entre columnas */
    align-items: start;
}

/* Header compacto alineado a la izquierda en esta página */
.dns-checker-page .section-header {
    text-align: left;
    margin-bottom: 1.25rem;
}
.dns-checker-page .section-title {
    font-size: 1.6rem;
    margin-bottom: 0.25rem;
}
.dns-checker-page .section-description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    max-width: none;
}

/* Listado de resolvers (columna izquierda) */
.dns-checker-page .dns-server-list {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 8px 0;
    height: 815px; /* Alto objetivo segun Imagen 2 */
    overflow-y: auto;
}

.dns-checker-page .dns-list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 14px;
    border-bottom: 1px solid var(--border-color);
}
.dns-checker-page .dns-list-header .title {
    font-weight: 600;
    color: var(--text-primary);
}
.dns-checker-page .dns-list-header .actions .btn-small {
    margin-left: 8px;
}

.dns-checker-page .dns-server-item {
    display: grid;
    grid-template-columns: 1fr auto auto 14px; /* contenido + estado + tiempo + punto */
    gap: 8px;
    padding: 10px 14px;
    border-bottom: 1px solid var(--border-color);
}
.dns-checker-page .dns-server-item:last-child { border-bottom: none; }
.dns-checker-page .dns-server-item .server-main { display: flex; gap: 8px; align-items: center; }
.dns-checker-page .dns-server-item .name { font-weight: 600; color: var(--text-primary); }
.dns-checker-page .dns-server-item .ip { color: var(--text-secondary); }
.dns-checker-page .dns-server-item .server-meta { display: flex; gap: 10px; color: var(--text-secondary); }
.dns-checker-page .status-dot { width: 10px; height: 10px; border-radius: 50%; align-self: center; }
.dns-checker-page .dns-server-item.ok .status-dot { background: var(--accent-green); }
.dns-checker-page .dns-server-item.fail .status-dot { background: var(--accent-red); }
.dns-checker-page .dns-server-item.pending .status-dot { background: var(--text-muted); }
.dns-checker-page .dns-server-item.mismatch .status-dot { background: var(--info); }

.dns-checker-page .dns-list-legend {
    display: flex;
    gap: 12px;
    padding: 8px 14px;
    color: var(--text-secondary);
}
.dns-checker-page .legend-dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; margin-right: 6px; }
.dns-checker-page .legend-dot.ok { background: var(--accent-green); }
.dns-checker-page .legend-dot.fail { background: var(--accent-red); }
.dns-checker-page .legend-dot.pending { background: var(--text-muted); }
.dns-checker-page .legend-dot.mismatch { background: var(--info); }

/* Panel del mapa (columna derecha) */
.dns-checker-page .dns-map-panel {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 12px;
}
.dns-checker-page .dns-map-panel .map-header { margin: 0 0 10px; }
.dns-checker-page .dns-map-panel .map-header .title { font-weight: 600; color: var(--text-primary); }
.dns-checker-page .dns-map-panel .map-header .subtitle { color: var(--text-secondary); font-size: 0.9rem; }

.dns-checker-page .ad-banner-inline { margin: 8px 0 10px; }

.dns-checker-page .map-container {
    position: relative;
    width: 100%;
    height: 420px; /* altura consistente para el mapa */
    background: #0f1825; /* fondo oscuro acorde al theme; Leaflet cubre esto */
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}
.dns-checker-page .map-marker {
    position: absolute;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    box-shadow: 0 0 0 2px rgba(0,0,0,0.3);
}
.dns-checker-page .map-marker.ok { background: var(--accent-green); }
.dns-checker-page .map-marker.fail { background: var(--accent-red); }
.dns-checker-page .map-marker.pending { background: var(--text-muted); }
.dns-checker-page .map-marker.mismatch { background: var(--info); }

/* Botón pequeño utilitario */
.dns-checker-page .btn-small {
    padding: 6px 10px;
    font-size: 0.85rem;
    border-radius: var(--radius-sm);
}

/* Contenedor ancho específico para DNS Checker */
.dns-checker-page .container-wide {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Simplificar wrapper para evitar grids innecesarios */
.dns-checker-page .content-layout-wide {
    display: block;
}

/* Reducir padding vertical del bloque de herramientas en esta página */
.dns-checker-page .tools-section {
    padding: 2rem 0;
}

/* Clase utilitaria para texto monoespaciado */
.dns-checker-page .mono {
    font-family: var(--font-mono, ui-monospace, Menlo, Monaco, Consolas, 'Courier New', monospace);
}

/* Responsivo básico para evitar desbordes en pantallas menores */
@media (max-width: 1280px) {
    .dns-checker-page .container-wide { max-width: 100%; }
    .dns-checker-page .content-layout-wide { grid-template-columns: 420px 1fr; }
    .dns-checker-page .dns-server-list { height: 640px; }
    .dns-checker-page .map-container { height: 380px; }
}
@media (max-width: 980px) {
    .dns-checker-page .content-layout-wide { grid-template-columns: 1fr; }
    .dns-checker-page .dns-server-list { height: auto; }
    .dns-checker-page .map-container { height: 320px; }
}

/* ===== LAYOUT CON ANUNCIOS ===== */
.content-layout {
    display: grid;
    grid-template-columns: 160px 1fr 160px;
    gap: 2rem;
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

.main-column {
    min-width: 0;
}

/* Layout ancho para DNS Checker: dos columnas proporcionales */
.content-layout-wide {
    display: grid;
    grid-template-columns: 410px 1fr; /* similar a la proporción de la imagen */
    gap: 20px;
    align-items: start;
    padding: 20px 0;
}

/* Panel listado de servidores */
.dns-check-layout {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
}
.dns-server-list {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 16px;
    box-shadow: var(--shadow-md);
}
.dns-list-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.dns-list-header .title { font-weight: 700; color: var(--text-primary); }
.dns-server-item { display: grid; grid-template-columns: 1fr auto 12px; gap: 10px; align-items: center; padding: 10px 8px; border-bottom: 1px solid var(--border-light); }
.dns-server-item:last-child { border-bottom: none; }
.dns-server-item .server-main { display: flex; gap: 10px; align-items: center; }
.dns-server-item .server-meta { display: flex; gap: 12px; color: var(--text-secondary); font-size: 0.9rem; }
.dns-server-item .flag { font-size: 1rem; }
.dns-server-item .ip.mono { font-family: var(--font-mono, ui-monospace, Menlo, Monaco, Consolas, 'Courier New', monospace); color: var(--text-secondary); }
.status-dot { width: 12px; height: 12px; border-radius: 50%; background: var(--border-light); }
.dns-server-item.ok .status-dot { background: var(--success); }
.dns-server-item.fail .status-dot { background: var(--error); }
.dns-server-item.pending .status-dot { background: var(--text-muted); }
.dns-list-legend { display: flex; gap: 16px; padding-top: 8px; color: var(--text-secondary); font-size: 0.85rem; }
.legend-dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; margin-right: 6px; }
.legend-dot.ok { background: var(--success); }
.legend-dot.fail { background: var(--error); }
.legend-dot.pending { background: var(--text-muted); }

/* Panel del mapa y tool */
.dns-map-panel { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-lg); padding: 16px; box-shadow: var(--shadow-md); }
.dns-map-panel .map-header .title { font-weight: 700; color: var(--text-primary); }
.dns-map-panel .map-header .subtitle { color: var(--text-secondary); font-size: 0.95rem; }
.ad-banner-inline { margin: 8px 0 12px; }
.map-container { position: relative; height: 330px; border: 1px dashed var(--border-light); border-radius: var(--radius-md); background: url('img/world-map.svg') center/cover no-repeat, linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01)); }

/* Ajustes específicos para la página DNS Checker */
.dns-checker-page .section-header { margin-bottom: 1.5rem; text-align: left; }
.dns-checker-page .section-title { font-size: 1.4rem; margin-bottom: 0.25rem; }
.dns-checker-page .section-description { font-size: 0.95rem; max-width: none; }
.map-marker { position: absolute; width: 12px; height: 12px; border-radius: 50%; transform: translate(-50%, -50%); box-shadow: 0 0 0 2px rgba(0,0,0,0.25); }
.map-marker.ok { background: var(--success); }
.map-marker.fail { background: var(--error); }
.map-marker.pending { background: var(--text-muted); }

/* Botón pequeño */
.btn-small { padding: 6px 10px; font-size: 0.85rem; border-radius: 10px; }

/* ===== FAQ & EDUCATIONAL SECTIONS (Bottom area) ===== */
.faq-section {
    padding: var(--spacing-xl) 0;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

.faq-grid {
    max-width: 1000px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.faq-item {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.faq-item summary {
    cursor: pointer;
    list-style: none;
    padding: var(--spacing-md);
    color: var(--text-primary);
    font-weight: 600;
    position: relative;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
    content: '+';
    position: absolute;
    right: 1rem;
    color: var(--accent-cyan);
    transition: 0.2s ease;
}

.faq-item[open] summary::after {
    content: '−';
    color: var(--accent-green);
}

.faq-answer {
    padding: 0 var(--spacing-md) var(--spacing-md) var(--spacing-md);
    color: var(--text-secondary);
    line-height: 1.7;
    border-top: 1px solid var(--border-color);
}

.tech-explain {
    padding: var(--spacing-xl) 0;
    background-color: var(--bg-primary);
}

.tech-explain .container {
    max-width: 1000px;
}

.tech-block {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.cta-banner {
    margin: var(--spacing-lg) auto 0;
    text-align: center;
}

.cta-banner .btn-primary,
.cta-banner .btn-secondary {
    display: inline-flex;
    margin: 0 var(--spacing-xs);
}

@media (max-width: 768px) {
    .faq-grid {
        grid-template-columns: 1fr;
    }
}

.sidebar-left,
.sidebar-right {
    position: sticky;
    top: 90px;
    height: fit-content;
}

/* ===== ESTILOS DE ANUNCIOS ===== */
.ad-banner-top {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    margin-bottom: 0;
}

.ad-placeholder,
.ad-placeholder-vertical {
    background: var(--ad-bg);
    border: 2px dashed var(--ad-border);
    border-radius: var(--radius-md);
    padding: 1rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    transition: var(--transition);
}

.ad-placeholder {
    min-height: 90px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.ad-placeholder-vertical {
    min-height: 600px;
    width: 160px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    writing-mode: vertical-rl;
    text-orientation: mixed;
}

.ad-sidebar {
    position: sticky;
    top: 90px;
}

/* ===== DETECCIÓN DE IP PRINCIPAL ===== */
.ip-display-main {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 3rem 2rem;
    margin: 2rem 0;
    box-shadow: var(--shadow-lg);
    text-align: center;
    position: relative;
    overflow: hidden;
}

/* ===== DNS CHECKER - LISTADO + MAPA ===== */
.dns-check-layout {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

/* ===== AI Explain Box ===== */
.ai-explain-box {
    background: var(--bg-card, #f9fafb);
    border: 1px solid var(--border-color, #e0e0e0);
    border-radius: var(--radius-lg, 8px);
    box-shadow: var(--shadow-md, 0 1px 3px rgba(0,0,0,0.08));
    padding: 1rem 1.25rem;
    margin-bottom: 1rem;
}
.ai-explain-box .ai-explain-title {
    font-weight: 700;
    color: var(--text-primary, #222);
    margin-bottom: 0.5rem;
}
.ai-explain-box .ai-explain-content {
    color: var(--text-primary, #222);
    line-height: 1.6;
    white-space: pre-wrap;
}

.dns-server-list {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: 1rem;
}

.dns-list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}
.dns-list-header .title {
    font-weight: 700;
    color: var(--text-primary);
}
.dns-list-header .actions .btn-small {
    padding: 6px 10px;
    font-size: 0.85rem;
}

.dns-server-item {
    display: grid;
    grid-template-columns: 1fr auto 16px;
    gap: 0.75rem;
    align-items: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 0.75rem 0.75rem 0.75rem 0.9rem;
    margin-bottom: 0.5rem;
    position: relative;
}

.dns-server-item .server-main { display: flex; align-items: center; gap: 0.6rem; }
.dns-server-item .flag { font-size: 1.1rem; }
.dns-server-item .name { font-weight: 600; color: var(--text-primary); }
.dns-server-item .ip { color: var(--text-secondary); }
.dns-server-item .mono { font-family: ui-monospace, Menlo, Monaco, Consolas, "Liberation Mono", monospace; }

.dns-server-item .server-meta { display: flex; align-items: center; gap: 0.6rem; color: var(--text-secondary); font-size: 0.9rem; }
.dns-server-item .status { font-weight: 600; }

.dns-server-item .status-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    box-shadow: var(--shadow-sm);
}
.dns-server-item.ok .status { color: var(--success); }
.dns-server-item.fail .status { color: var(--error); }
.dns-server-item.pending .status { color: var(--text-muted); }
.dns-server-item.ok .status-dot { background: var(--success); }
.dns-server-item.fail .status-dot { background: var(--error); }
.dns-server-item.pending .status-dot { background: var(--text-muted); }

.dns-list-legend { display: flex; gap: 1rem; align-items: center; margin-top: 0.75rem; color: var(--text-secondary); }
.legend-dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; margin-right: 6px; }
.legend-dot.ok { background: var(--success); }
.legend-dot.fail { background: var(--error); }
.legend-dot.pending { background: var(--text-muted); }

.dns-map-panel {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: 1rem;
}
.dns-map-panel .map-header .title { font-weight: 700; color: var(--text-primary); }
.dns-map-panel .map-header .subtitle { color: var(--text-secondary); font-size: 0.9rem; }

.map-container {
    position: relative;
    width: 100%;
    height: 360px;
    margin-top: 0.75rem;
    background: radial-gradient(circle at 20% 80%, rgba(0, 212, 255, 0.08) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(0, 196, 167, 0.08) 0%, transparent 50%),
                linear-gradient(135deg, rgba(26,35,50,0.75), rgba(32,41,56,0.85));
    border: 1px dashed var(--border-light);
    border-radius: var(--radius-md);
    overflow: hidden;
}
.map-container::before {
    content: '';
    position: absolute; inset: 0;
    background: url('img/world-map.svg') center/contain no-repeat;
    opacity: 0.35;
}
.map-marker {
    position: absolute;
    width: 12px; height: 12px;
    border-radius: 50%;
    box-shadow: 0 0 0 2px rgba(0,0,0,0.3);
    transform: scale(1);
    transition: transform 0.2s ease;
}
.map-marker:hover { transform: scale(1.25); }
.map-marker.ok { background: var(--success); }
.map-marker.fail { background: var(--error); }
.map-marker.pending { background: var(--text-muted); }

@media (max-width: 1024px) {
    .dns-check-layout { grid-template-columns: 1fr; }
    .map-container { height: 300px; }
}

.ip-display-main::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.ip-display-main h2 {
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-size: 1.5rem;
    font-weight: 400;
}

.ip-main-value {
    font-size: 4rem;
    font-weight: 800;
    color: var(--accent-cyan);
    font-family: var(--font-mono);
    margin: 20px 0 40px;
    text-shadow: 0 0 24px var(--glow-cyan);
    letter-spacing: 0.02em;
    line-height: 1.2;
}

.ip-details {
    margin-top: 2rem;
}

.ip-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.ip-card {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 16px;
    padding: 28px 24px;
    text-align: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(20px);
    box-shadow:
        0 8px 32px rgba(0, 0, 0, 0.2),
        0 4px 16px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.ip-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-teal));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.ip-card:hover {
    transform: translateY(-8px);
    box-shadow:
        0 20px 60px rgba(0, 0, 0, 0.3),
        0 8px 25px rgba(0, 0, 0, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.15);
    border-color: var(--accent-cyan);
}

.ip-card:hover::before {
    opacity: 1;
}

.ip-label {
    font-size: 1.5rem !important;
    font-weight: 500 !important;
    color: var(--text-secondary) !important;
    letter-spacing: 0.02em !important;
    text-transform: uppercase !important;
    margin-bottom: 12px !important;
    opacity: 0.8 !important;
}

.ip-value {
    font-size: 1rem;
    font-weight: 600;
    color: #ffffff !important;
    line-height: 1.4;
    word-break: break-all;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
    font-family: var(--font-mono);
}

.ip-value .error {
    color: var(--error-color);
    background: transparent;
    border: 0;
    padding: 0;
    margin: 0;
    box-shadow: none;
    border-radius: 0;
    font-weight: 700;
    text-shadow: none;
}

/* Responsive tweaks for main IP value */
@media (max-width: 768px) {
    .ip-main-value {
        font-size: 2.6rem;
    }
}

@media (max-width: 480px) {
    .ip-main-value {
        font-size: 2rem;
    }
}

/* ===== RESPONSIVE DESIGN ===== */
/* IP Additional Info Section */
.ip-additional-info {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    margin: 2rem 0;
}

.info-grid-simple {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

.info-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.info-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.info-item h3 {
    color: var(--text-primary);
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.info-item p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

@media (max-width: 1200px) {
    .content-layout {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .sidebar-left,
    .sidebar-right {
        display: none;
    }
}

@media (max-width: 768px) {
    .ad-banner-top {
        padding: 0.5rem 0;
    }
    
    .ad-placeholder {
        min-height: 60px;
        font-size: 0.75rem;
    }
    
    .ip-display {
        padding: 1.5rem;
        margin: 1rem 0;
    }
    
    .ip-cards {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .info-grid-simple {
        grid-template-columns: 1fr;
    }
    
    .ip-additional-info {
        padding: 1.5rem;
        margin: 1rem 0;
    }
}

/* ===== PRINT STYLES ===== */
@media print {
    .main-nav,
    .hero,
    .ad-banner-top,
    .sidebar-left,
    .sidebar-right,
    .ad-sidebar {
        display: none;
    }
    
    .content-layout {
        grid-template-columns: 1fr;
        max-width: none;
        padding: 0;
    }
    
    .tool-card,
    .article-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }
}

/* ===== TOOLS RESULT PANELS & PING TABLE ===== */
.result-panel { background-color: var(--bg-secondary); border: 1px solid var(--border-color); border-radius: 10px; padding: 16px; margin-top: 14px; }
.result-panel h4 { margin: 0 0 10px; font-weight: 600; color: var(--text-primary); }
.result-panel.success { border-color: #2e7d32; }
.result-panel.error { border-color: var(--accent-red); }
.result-output { white-space: pre-wrap; font-family: var(--font-mono); font-size: 0.9rem; line-height: 1.6; color: var(--text-primary); background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 8px; padding: 12px; }

/* Metrics grid for Ping (compat con variables actuales) */
.metrics-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; margin: 14px 0 10px; }
.metric { background: var(--bg-secondary); border: 1px solid var(--border-color); padding: 10px 12px; border-radius: 8px; display: flex; align-items: center; justify-content: space-between; }
.metric-label { font-size: 13px; color: var(--text-secondary); margin-right: 10px; }
.metric-value { font-weight: 600; color: var(--text-primary); font-variant-numeric: tabular-nums; }

/* Packet table */
.packet-section { margin-top: 6px; }
.section-subtitle { margin: 6px 0 8px; font-size: 0.95rem; color: var(--text-primary); font-weight: 600; }
.packet-table { width: 100%; border-collapse: collapse; background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 8px; overflow: hidden; }
.packet-table th, .packet-table td { padding: 8px 10px; border-bottom: 1px solid var(--border-color); text-align: left; }
.packet-table th { color: var(--text-secondary); font-weight: 600; font-size: 12px; letter-spacing: 0.03em; background: rgba(255,255,255,0.02); }
.packet-table td { color: var(--text-primary); font-size: 13px; }
.packet-table tr:last-child td { border-bottom: none; }
.packet-table .status-ok { color: #59d389; }
.packet-table .status-lost { color: #ff8b6e; }

/* ===== DNS CHECKER WIDE LAYOUT OVERRIDES ===== */
.dns-checker-page .container-wide {
    max-width: 1920px; /* mucho más ancho */
    margin: 0 auto;
    padding: 0 1rem;
}

.dns-checker-page .content-layout-wide {
    display: grid;
    grid-template-columns: 700px 1fr; /* ensanchar listado */
    gap: 32px;
    align-items: start;
}

.dns-checker-page .dns-server-list {
    height: 815px; /* mantener alto fijo con scroll interno */
    overflow-y: auto;
}

.dns-checker-page .dns-map-panel .map-header { margin-bottom: 10px; }

.dns-checker-page .ad-banner-inline .ad-placeholder {
    width: 728px;
    height: 90px;
    margin: 0 auto 12px;
}

.dns-checker-page .map-container {
    width: 100%;
    max-width: none; /* sin límite de ancho */
    height: 479px; /* altura exacta del mapa */
    background: url('../img/world-map.svg') center/contain no-repeat; /* mismo fondo */
    position: relative;
}

/* Marcadores del mapa */
.dns-checker-page .map-marker {
    position: absolute;
    width: 12px; height: 12px;
    border-radius: 50%;
    box-shadow: 0 0 0 2px rgba(0,0,0,0.25);
}
.dns-checker-page .map-marker.ok { background: #59d389; }
.dns-checker-page .map-marker.fail { background: #ff6b6b; }
.dns-checker-page .map-marker.pending { background: #b0b7c3; }

@media (max-width: 1280px) {
    .dns-checker-page .container-wide { max-width: 1200px; }
    .dns-checker-page .content-layout-wide { grid-template-columns: 1fr; gap: 20px; }
    .dns-checker-page .map-container { height: 420px; }
}

/* ===== QUICK GUIDE (Unified collapsible block) ===== */
.quick-guide { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 12px; padding: 10px 12px; color: var(--text-secondary); margin-top: 8px; }
.quick-guide > summary { cursor: pointer; font-weight: 600; color: var(--text-primary); list-style: none; }
.quick-guide > summary::-webkit-details-marker { display: none; }
.quick-guide-content { margin-top: 8px; }
.quick-guide-content ul { margin: 6px 0 0 18px; list-style: disc; }

/* ===== ADVANCED OPTIONS (Ping/DNS) ===== */
.advanced-options { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 12px; margin-top: 1rem; overflow: hidden; }
.advanced-options summary { cursor: pointer; list-style: none; padding: 12px 14px; color: var(--text-primary); font-weight: 600; position: relative; display: flex; align-items: center; gap: 8px; }
.advanced-options summary::-webkit-details-marker { display: none; }
.advanced-options summary::after { content: '+'; margin-left: auto; color: var(--accent-cyan); transition: 0.2s ease; }
.advanced-options[open] summary::after { content: '−'; color: var(--accent-green); }
.advanced-options .options-grid { border-top: 1px solid var(--border-color); padding: 14px; display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 12px; background: rgba(15, 23, 42, 0.4); }

.option-field { background: rgba(15, 23, 42, 0.6); border: 1px solid var(--border-medium); border-radius: 10px; padding: 12px; display: flex; flex-direction: column; gap: 8px; }
.field-title { font-size: 0.9rem; font-weight: 600; color: var(--text-secondary); display: flex; align-items: center; gap: 6px; }

.help-icon { display: inline-flex; align-items: center; justify-content: center; width: 18px; height: 18px; border-radius: 50%; background: rgba(96, 165, 250, 0.15); border: 1px solid rgba(96, 165, 250, 0.35); color: var(--text-primary); font-size: 12px; line-height: 1; cursor: help; position: relative; }
.help-icon::after { content: attr(data-tooltip); position: absolute; left: 50%; transform: translateX(-50%); bottom: calc(100% + 8px); background: rgba(17, 24, 39, 0.95); color: var(--text-primary); border: 1px solid var(--border-medium); border-radius: 8px; padding: 8px 10px; width: max-content; max-width: 260px; font-size: 12px; line-height: 1.4; box-shadow: var(--shadow-md); opacity: 0; pointer-events: none; transition: opacity .15s ease; }
.help-icon:hover::after, .help-icon:focus::after { opacity: 1; }

.segmented-group { display: flex; gap: 8px; flex-wrap: wrap; background: rgba(26, 31, 46, 0.6); border: 1px solid var(--border-medium); padding: 8px; border-radius: 10px; }
.segmented-item input { display: none; }
.segmented-item .segment-label { display: inline-block; padding: 6px 10px; border-radius: 8px; border: 1px solid var(--border-medium); color: var(--text-secondary); background: rgba(21, 26, 40, 0.6); cursor: pointer; font-size: 0.85rem; transition: all .2s ease; }
.segmented-item input:checked + .segment-label { background: rgba(99, 102, 241, 0.2); border-color: rgba(99, 102, 241, 0.6); color: var(--text-primary); box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.25) inset; }

.checkbox-row { display: flex; gap: 10px; flex-wrap: wrap; }
.checkbox-row label { display: inline-flex; align-items: center; gap: 6px; padding: 6px 10px; border: 1px solid var(--border-medium); border-radius: 8px; color: var(--text-secondary); background: rgba(21, 26, 40, 0.6); cursor: pointer; font-size: 0.85rem; transition: all .2s ease; }
.checkbox-row input { margin-right: 4px; accent-color: var(--accent-cyan); }

.toggle-switch { display: inline-flex; align-items: center; gap: 8px; }
.toggle-switch input { display: none; }
.switch-label { position: relative; width: 42px; height: 24px; background: rgba(45, 55, 72, 0.6); border: 1px solid var(--border-medium); border-radius: 999px; cursor: pointer; transition: background .2s ease; }
.switch-label::after { content: ''; position: absolute; top: 50%; left: 4px; transform: translateY(-50%); width: 18px; height: 18px; border-radius: 50%; background: var(--bg-primary); box-shadow: var(--shadow-sm); transition: left .2s ease; }
.toggle-switch input:checked + .switch-label { background: rgba(34, 197, 94, 0.35); border-color: rgba(34, 197, 94, 0.6); }
.toggle-switch input:checked + .switch-label::after { left: 20px; }
.switch-text { color: var(--text-secondary); font-size: 0.85rem; }

/* Compact grid for multiple small toggles within an option field */
.options-grid-small {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
  align-items: center;
}
.tool-form .options-grid-small { margin-top: 4px; }

.mono-cell { font-family: var(--font-mono); white-space: pre-wrap; word-break: break-word; }

/* Estado general (no sólo dentro de tablas) */
.status-ok { color: #59d389; }
.status-lost { color: #ff8b6e; }

@media (max-width: 600px) {
  .advanced-options .options-grid { grid-template-columns: 1fr; }
}

/* ===== PING ADVANCED FORM ===== */
.tool-form { margin-top: 12px; }
.input-group { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.input-group input[type="text"],
.input-group input[type="number"],
.input-group select { background: var(--bg-secondary); border: 1px solid var(--border-color); color: var(--text-primary); border-radius: 8px; padding: 8px 10px; }
.input-count { width: 90px; }
.btn.btn-primary { display: inline-flex; align-items: center; gap: 6px; background: var(--bg-tertiary); color: var(--text-primary); border: 1px solid var(--border-color); border-radius: 8px; padding: 8px 12px; text-decoration: none; }
.btn.btn-primary:hover { background: var(--bg-card); }

.advanced-options { margin-top: 10px; border: 1px solid var(--border-color); border-radius: 10px; padding: 10px; background: var(--bg-secondary); }
.advanced-options summary { cursor: pointer; color: var(--text-primary); font-weight: 600; }
.options-grid { display: grid; grid-template-columns: repeat(2, minmax(280px, 1fr)); gap: 16px; margin-top: 10px; align-items: start; }
.option-field { padding: 6px 0; }
@media (max-width: 900px) { .options-grid { grid-template-columns: 1fr; } }
.option-field > label { display: block; font-size: 13px; color: var(--text-secondary); margin-bottom: 6px; }
.radio-group { display: flex; gap: 10px; }
.checkbox { color: var(--text-secondary); font-size: 13px; }

/* ===== HELP ICON TOOLTIP ===== */
.help-icon { display: inline-flex; align-items: center; justify-content: center; width: 18px; height: 18px; margin-left: 6px; border-radius: 50%; border: 1px solid var(--border-color); background: var(--bg-card); color: var(--text-secondary); font-weight: 700; font-size: 12px; cursor: help; position: relative; }
.help-icon:hover { color: var(--primary-color); border-color: var(--primary-color); }
.help-icon:focus { outline: 2px solid rgba(0, 212, 255, 0.25); outline-offset: 2px; }
.help-icon::after { content: attr(data-tooltip); position: absolute; left: 50%; transform: translateX(-50%); bottom: calc(100% + 8px); background: var(--bg-card); color: var(--text-primary); border: 1px solid var(--border-color); border-radius: 8px; padding: 8px 10px; box-shadow: var(--shadow-md); white-space: normal; max-width: 300px; opacity: 0; pointer-events: none; transition: opacity .15s ease; z-index: 100; }
.help-icon:hover::after, .help-icon:focus::after { opacity: 1; }

/* ===== SEGMENTED CONTROLS (BUTTON GROUPS) ===== */
.segmented-group { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.segmented-item { position: relative; }
.segmented-item input { position: absolute; opacity: 0; pointer-events: none; width: 1px; height: 1px; left: -9999px; appearance: none; }
.segment-label { display: inline-flex; align-items: center; justify-content: center; padding: 9px 14px; border: 1px solid var(--border-color); border-radius: 10px; background: var(--bg-card); color: var(--text-primary); font-size: 13px; cursor: pointer; user-select: none; transition: background .15s ease, border-color .15s ease, color .15s ease, box-shadow .15s ease; }
.segmented-item input:checked + .segment-label { background: var(--bg-secondary); border-color: var(--cyan); color: var(--text-primary); box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.12); font-weight: 600; }
.segmented-item input:focus + .segment-label { outline: 2px solid rgba(120,160,255,0.35); outline-offset: 2px; }
.segment-label:hover { background: rgba(255,255,255,0.04); }

.option-field .field-title { font-weight: 600; color: var(--text-primary); margin-bottom: 6px; font-size: 13px; }

/* ===== TOGGLE SWITCH (Checkbox deslizable) ===== */
.toggle-switch { display: inline-flex; align-items: center; gap: 10px; }
.toggle-switch input { position: absolute; left: -9999px; opacity: 0; }
.switch-label { position: relative; width: 42px; height: 24px; background: rgba(45, 55, 72, 0.6); border: 1px solid var(--border-medium); border-radius: 999px; cursor: pointer; transition: background .2s ease; display: inline-block; }
.switch-label { overflow: hidden; }
.switch-label::after { content: ""; position: absolute; top: 50%; left: 4px; width: 18px; height: 18px; background: var(--text-secondary); border-radius: 50%; box-shadow: var(--shadow-sm); transform: translateY(-50%); transition: left .2s ease, background .15s ease; }
.toggle-switch input:checked + .switch-label { background: rgba(34, 197, 94, 0.35); border-color: rgba(34, 197, 94, 0.6); box-shadow: none; }
.toggle-switch input:checked + .switch-label::after { left: 20px; transform: translateY(-50%); background: var(--primary-color); }
.switch-label:hover { background: rgba(255,255,255,0.04); }
.switch-text { font-size: 13px; color: var(--text-secondary); }

/* ===== Advanced Options — Unificación visual (Ping y DNS) ===== */
.tool-form .advanced-options {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  margin-top: 12px;
}
.tool-form .advanced-options .options-grid {
  background: transparent;
  border-top: 1px solid var(--border-color);
  padding: 14px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}
.tool-form .field-title {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 600;
}
.tool-form .option-field {
  background: transparent;
  border: 0;
  border-radius: 0;
  padding: 6px 0;
}
.tool-form .option-field input[type="text"],
.tool-form .option-field input[type="number"],
.tool-form .option-field select {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  border-radius: 8px;
  padding: 8px 10px;
  width: 100%;
}
.tool-form .input-row {
  display: grid;
  grid-template-columns: 1fr 160px;
  gap: 8px;
}
@media (max-width: 600px) {
  .tool-form .input-row { grid-template-columns: 1fr; }
}
.tool-form .checkbox-row { display: flex; flex-wrap: wrap; gap: 10px; }
.tool-form .checkbox-row label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: rgba(21, 26, 40, 0.55);
  border: 1px solid var(--border-medium);
  border-radius: 999px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: all .2s ease;
  box-shadow: inset 0 -1px 0 rgba(255,255,255,0.04);
}
.tool-form .checkbox-row label:hover { border-color: var(--accent-cyan); background: rgba(21, 26, 40, 0.7); }
.tool-form .checkbox-row input { accent-color: var(--accent-cyan); }
.tool-form .checkbox-row input:checked + span,
.tool-form .checkbox-row input:checked ~ span {
  color: var(--text-primary);
}
.tool-form .checkbox-row label input[type="checkbox"] {
  position: relative;
}
.tool-form .checkbox-row label input[type="checkbox"]::before {
  content: '';
  display: inline-block;
  width: 16px;
  height: 16px;
  border-radius: 4px;
  border: 1px solid var(--border-medium);
  background: var(--bg-card);
  margin-right: 4px;
}
.tool-form .checkbox-row label input[type="checkbox"]:checked::before {
  background: linear-gradient(135deg, var(--cyan), var(--green));
  border-color: var(--cyan);
}

/* ===== DNS Attention Input Highlight ===== */
.tool-form .input-attention input[type="text"] {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 2px rgba(0, 212, 255, 0.12), 0 0 16px rgba(0, 212, 255, 0.08);
  transition: box-shadow .2s ease, border-color .2s ease;
  animation: dnsAttentionPulse 2.8s ease-in-out 2;
}
.tool-form .input-attention input[type="text"]:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.22), 0 0 20px rgba(0, 212, 255, 0.16);
}
@keyframes dnsAttentionPulse {
  0% { box-shadow: 0 0 0 0 rgba(0,212,255,0), 0 0 0 rgba(0,212,255,0); }
  50% { box-shadow: 0 0 0 3px rgba(0,212,255,0.18), 0 0 22px rgba(0,212,255,0.14); }
  100% { box-shadow: 0 0 0 0 rgba(0,212,255,0), 0 0 0 rgba(0,212,255,0); }
}

/* ===== Toggle Switch Alignment Fix (DNS/Ping) ===== */
.tool-form .toggle-switch { display: inline-flex; align-items: center; gap: 8px; }
.tool-form .toggle-switch .switch-label {
  position: relative; width: 46px; height: 26px;
  border: 1px solid var(--border-color); border-radius: 999px; background: var(--bg-card);
}
.tool-form .toggle-switch .switch-label::after {
  content: ""; position: absolute; top: 50%; left: 4px; transform: translateY(-50%);
  width: 18px; height: 18px; border-radius: 50%; background: var(--text-secondary);
  transition: left .15s ease, background .15s ease;
}
.tool-form .toggle-switch input:checked + .switch-label { background: var(--bg-secondary); border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.12); }
.tool-form .toggle-switch input:checked + .switch-label::after { left: 24px; background: var(--primary-color); }

/* ===== QUICK GUIDE (collapsible helper box) ===== */
.quick-guide {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 10px 12px;
  color: var(--text-secondary);
  margin-top: 8px;
}
.quick-guide > summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--text-primary);
  list-style: none;
}
.quick-guide > summary::-webkit-details-marker { display: none; }
.quick-guide-content { margin-top: 8px; }
.quick-guide-content ul { margin: 6px 0 0 18px; list-style: disc; }
/* ===== CONTACT SECTION ===== */
.contact-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    margin-top: var(--spacing-md);
}

.contact-method {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    width: min(540px, 100%);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.contact-method:hover {
    background: var(--bg-card-hover);
    box-shadow: var(--shadow-lg);
    transform: translateY(-1px);
}

.contact-method h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.contact-method p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.contact-email {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-primary);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.6rem 0.9rem;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.contact-email:hover {
    color: var(--primary-color);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-glow);
}
/* ===== ABOUT PAGE SECTIONS ===== */
.about-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem 1.75rem;
    margin: 1.25rem 0;
    box-shadow: var(--shadow-md);
}

.about-section h2 {
    color: var(--text-primary);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.about-section p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-sm);
}

.features-grid,
.tech-grid,
.use-cases,
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.feature,
.tech-item,
.use-case,
.stat {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1rem 1.25rem;
    transition: var(--transition);
}

.feature:hover,
.tech-item:hover,
.use-case:hover,
.stat:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(0, 212, 255, 0.25);
}

.feature h3,
.tech-item h3,
.use-case h3,
.stat h3 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 1.05rem;
    font-weight: 600;
}

.feature p,
.tech-item p,
.use-case p,
.stat p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.tech-item ul,
.use-case ul {
    margin-left: 1rem;
    color: var(--text-secondary);
}

.header h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    text-align: center;
}

@media (max-width: 768px) {
    .about-section {
        padding: 1.25rem;
    }
}
/* ===== HOWTO SECTION (Cómo usar) ===== */
.howto-section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.5rem 1.25rem;
  margin: 1.5rem 0;
  box-shadow: var(--shadow-md);
}

.howto-section .section-title {
  margin: 0 0 0.75rem;
  font-size: 1.5rem;
  color: var(--text-primary);
}

.howto-list {
  margin: 0.5rem 0 0.75rem;
  padding-left: 1.25rem;
}

.howto-list li {
  margin: 0.25rem 0;
  color: var(--text-secondary);
}

.howto-list li strong {
  color: var(--text-primary);
}

.howto-tip {
  margin-top: 0.75rem;
  background: rgba(255,255,255,0.03);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.75rem;
  color: var(--text-secondary);
}
/* DNS Checker overrides: enforce two-column grid and prevent overlap */
.dns-checker-page .container-wide { max-width: 1400px; margin: 0 auto; padding: 0 1rem; }
.dns-checker-page .content-layout-wide { display: block; }
.dns-checker-page .dns-check-layout { display: grid !important; grid-template-columns: minmax(360px, 1fr) 1.4fr !important; gap: 1.5rem; align-items: start; grid-auto-rows: minmax(0, auto); }
.dns-checker-page .dns-server-list, .dns-checker-page .dns-map-panel { float: none !important; position: relative; min-width: 0; align-self: start; }
.dns-checker-page .dns-server-list { grid-column: 1; grid-row: 1; z-index: 2; }
.dns-checker-page .dns-map-panel { grid-column: 2; grid-row: 1; z-index: 1; }
.dns-checker-page .map-container { display: block; width: 100%; height: 520px !important; }
@media (max-width: 1100px) { 
  .dns-checker-page .dns-check-layout { grid-template-columns: 1fr !important; }
  .dns-checker-page .dns-server-list { grid-column: 1; grid-row: 1; }
  .dns-checker-page .dns-map-panel { grid-column: 1; grid-row: 2; }
}
@media (max-width: 768px) {
  .dns-checker-page .map-container { height: 380px !important; }
}

/* Compact server list items */
.dns-checker-page .dns-server-list { --dns-item-padding: 0.6rem; }
.dns-checker-page .dns-server-item { padding: var(--dns-item-padding) 0.75rem; margin: 0.35rem 0; border-radius: var(--radius-md); }
.dns-checker-page .server-main { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 0.6rem; }
.dns-checker-page .server-id { display: flex; align-items: center; gap: 0.4rem; }
.dns-checker-page .server-id .name { font-weight: 600; }
.dns-checker-page .server-result { text-align: right; }
.dns-checker-page .resolved-answer { font-size: 0.9rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 28ch; }
.dns-checker-page .server-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 0.75rem; font-size: 0.85rem; color: var(--text-secondary); margin-top: 0.25rem; }
.dns-checker-page .server-meta .mono { font-size: 0.85rem; }
.dns-checker-page .dns-server-item .status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent-muted, #888); margin-left: auto; }
/* Anycast badge styling */
.dns-checker-page .badge-anycast {
    display: inline-block;
    margin-left: 6px;
    padding: 2px 6px;
    border-radius: 999px;
    font-size: 0.60rem; /* smaller text to avoid overshadowing */
    line-height: 1;
    font-weight: 600;
    background: rgba(59,130,246,0.15); /* blue tint */
    color: #3b82f6;
    border: 1px solid rgba(59,130,246,0.35);
}

/* Map panel banner styling */
.dns-checker-page .dns-map-panel .ad-banner-inline { display: flex; justify-content: center; align-items: center; margin: 0.5rem 0 0.75rem; }
.dns-checker-page .dns-map-panel .ad-banner-inline .ad-placeholder { width: min(100%, 728px); min-height: 90px; border: 1px dashed var(--border-color); border-radius: var(--radius-md); background: rgba(255,255,255,0.02); display: flex; flex-direction: column; justify-content: center; align-items: center; }

/* Header alignment specific to DNS Checker */
.dns-checker-page .section-header { text-align: center; margin: 0 auto 1.5rem; }
.dns-checker-page .section-title { text-align: center; margin: 0 auto 0.5rem; display: block; }
.dns-checker-page .section-description { text-align: center; margin: 0 auto 1rem; max-width: 780px; }
/* ===== DNS CHECKER: mostrar lista completa sin scroll ===== */
.dns-checker-page .dns-check-layout {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 24px;
    align-items: start;
}

.dns-checker-page .dns-server-list {
    overflow: visible !important;
    max-height: none !important;
    height: auto !important;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
}

.dns-checker-page .dns-list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.dns-checker-page .dns-server-item {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 12px;
    margin-bottom: 12px;
}

.dns-checker-page .server-main {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: center;
}

.dns-checker-page .server-meta {
    display: grid;
    grid-template-columns: repeat(4, auto);
    gap: 12px;
    margin-top: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.dns-checker-page .dns-list-legend {
    display: flex;
    gap: 12px;
    align-items: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 8px;
}

.dns-checker-page .legend-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
    margin-right: 6px;
}
.dns-checker-page .legend-dot.ok { background: #59d389; }
.dns-checker-page .legend-dot.fail { background: #ff8b6e; }
.dns-checker-page .legend-dot.pending { background: #b0b7c3; }

.dns-checker-page .dns-map-panel .map-container {
    height: 420px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    content-visibility: auto;
    contain-intrinsic-size: 420px 100%;
}

/* ===== Under-map AdSense block ===== */
.dns-checker-page .adsense-under-map {
    margin-top: 12px;
    background: var(--bg-card);
    border: 1px dashed var(--border-color);
    border-radius: 10px;
    padding: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.dns-checker-page .adsense-under-map .ad-placeholder {
    color: var(--text-muted);
    text-align: center;
}

/* Under-map educational block spacing */
.dns-checker-page .under-map-edu {
    margin-top: 12px;
}
.dns-checker-page .under-map-edu .card-title {
    font-size: 1rem;
}
.dns-checker-page .under-map-edu .card-content h4 {
    margin: 10px 0 6px;
}
.dns-checker-page .under-map-edu .card-list {
    margin-left: 1rem;
}
.dns-checker-page .under-map-edu .tip {
    background: rgba(255,255,255,0.06);
    border: 1px solid var(--border-light);
    border-radius: 8px;
    padding: 10px 12px;
    margin-top: 10px;
}

/* Educational section tweaks */
.dns-checker-page .dns-edu .card-content .card-list {
    margin-left: 1rem;
}
.dns-checker-page .dns-edu .tip {
    background: rgba(255,255,255,0.06);
    border: 1px solid var(--border-light);
    border-radius: 8px;
    padding: 10px 12px;
    margin-top: 10px;
}

/* Mostrar múltiples NS ordenados en fila con wrap */
.dns-checker-page .resolved-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 12px;
    align-items: center;
}
.dns-checker-page .resolved-list .ns-item {
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 6px 10px;
    font-family: var(--font-mono);
}

/* ===== DNS Checker Compact Overrides ===== */
/* Reduce paddings, font sizes and spacing to make server cards smaller */
.dns-checker-page .dns-server-item {
    padding: 6px 10px;
    margin: 6px 0;
    font-size: 0.85rem; /* ~13.6px */
    line-height: 1.35;
}
.dns-checker-page .server-main { gap: 8px; }
.dns-checker-page .server-id { gap: 8px; }
.dns-checker-page .server-id .flag { font-size: 0.95rem; }
.dns-checker-page .server-id .name { font-size: 0.9rem; font-weight: 600; }
.dns-checker-page .mono { font-size: 0.8rem; }
.dns-checker-page .resolved-list { gap: 6px 8px; }
.dns-checker-page .resolved-list .ns-item { padding: 2px 6px; border-radius: 6px; }
.dns-checker-page .server-meta { gap: 8px; font-size: 0.8rem; }
.dns-checker-page .dns-list-legend { gap: 10px; font-size: 0.8rem; }
.dns-checker-page .legend-dot { width: 8px; height: 8px; }
.dns-checker-page .status-dot { width: 8px; height: 8px; margin-left: 8px; }

/* Compact search bar */
.dns-checker-page .dns-search-bar { display: flex; align-items: center; gap: 8px; }
.dns-checker-page .dns-search-bar .dns-input { padding: 6px 10px; height: 30px; font-size: 0.85rem; }
.dns-checker-page .dns-search-bar .dns-select { height: 30px; padding: 4px 8px; font-size: 0.85rem; }
.dns-checker-page .dns-search-bar .btn { height: 30px; padding: 4px 10px; font-size: 0.85rem; }
/* Panel Avanzado en DNS Checker */
.dns-checker-page .dns-advanced-panel { 
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 10px 12px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 10px 12px;
}
.dns-checker-page .field-group { display: flex; flex-direction: column; gap: 6px; }
.dns-checker-page .field-label { display: flex; align-items: center; gap: 6px; color: var(--text-secondary); font-size: 0.9rem; font-weight: 600; }
.dns-checker-page .field-control { display: flex; align-items: center; gap: 8px; }
.dns-checker-page .help-icon { display: inline-flex; align-items: center; justify-content: center; width: 18px; height: 18px; border-radius: 50%; border: 1px solid var(--border-color); background: var(--bg-card); color: var(--text-secondary); font-weight: 700; font-size: 12px; cursor: help; position: relative; }
.dns-checker-page .help-icon:hover { color: var(--primary-color); border-color: var(--primary-color); }
.dns-checker-page .help-icon:focus { outline: 2px solid rgba(0, 212, 255, 0.25); outline-offset: 2px; }
/* ===== Overrides fuertes: Panel Avanzado alineado a la izquierda ===== */
.dns-checker-page #dns-advanced-panel[hidden] {
  display: none !important;
}
.dns-checker-page #dns-advanced-panel:not([hidden]) {
  display: block !important;
  text-align: left !important;
  margin-left: 0 !important;
  margin-right: 0 !important;
  justify-items: start !important;
  align-items: start !important;
}
.dns-checker-page #dns-advanced-panel .advanced-inner {
  display: flex !important;
  justify-content: flex-start !important;
  align-items: flex-start !important;
  align-content: flex-start !important;
  flex-wrap: wrap !important;
  text-align: left !important;
}
.dns-checker-page #dns-advanced-panel .field-group,
.dns-checker-page #dns-advanced-panel .field-label,
.dns-checker-page #dns-advanced-panel .field-control,
.dns-checker-page #dns-advanced-panel .field-control .dns-input,
.dns-checker-page #dns-advanced-panel .field-control .dns-select {
  text-align: left !important;
}
.dns-checker-page .help-icon::after { content: attr(data-tooltip); position: absolute; left: 50%; transform: translateX(-50%); bottom: calc(100% + 8px); background: var(--bg-card); color: var(--text-primary); border: 1px solid var(--border-color); border-radius: 8px; padding: 8px 10px; box-shadow: var(--shadow-md); width: max-content; max-width: 380px; opacity: 0; pointer-events: none; transition: opacity .15s ease; white-space: normal; }
.dns-checker-page .help-icon:hover::after, .dns-checker-page .help-icon:focus::after { opacity: 1; }
/* ===== DNS Checker: prevent overflow on long answers (SOA/TXT/CNAME) ===== */
/* Allow flex children to shrink and wrap content */
.dns-checker-page .server-main { display: flex; align-items: center; min-width: 0; }
.dns-checker-page .server-result { flex: 1 1 auto; min-width: 0; }
/* Wrap very long tokens (domains, hashes) inside answer containers */
.dns-checker-page .resolved-answer { white-space: normal; overflow-wrap: anywhere; word-break: break-word; }
/* Also ensure NS list items wrap if needed */
.dns-checker-page .resolved-list .ns-item { overflow-wrap: anywhere; word-break: break-word; }
/* ===== AI Diagnostic Panel ===== */
.dns-checker-page .ai-explain-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 12px 14px;
    margin-bottom: 12px;
}
.dns-checker-page .ai-explain-title {
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
    text-align: left;
}
.dns-checker-page .ai-explain-content {
    color: var(--text-primary);
    text-align: left; /* asegurar alineado a la izquierda */
    white-space: normal; /* respetar <br> sin sangrías extra */
    line-height: 1.5;
}

/* Badge de incompatibilidad por tipo */
.dns-checker-page .badge-incompatible {
    color: #f59e0b; /* naranja */
    font-weight: 600;
    margin-left: 6px;
}
/* ===== AI Diagnostic Box ===== */
.ai-explain-box {
    background: var(--bg-card, rgba(26,35,50,0.85));
    border: 1px solid var(--border-color, rgba(255,255,255,0.15));
    border-radius: var(--radius-lg, 12px);
    padding: 16px 18px;
    box-shadow: var(--shadow-md, 0 4px 10px rgba(0,0,0,0.2));
    margin: 12px 0 16px;
}

.ai-explain-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    color: var(--text-primary, #fff);
    margin-bottom: 8px;
}

.ai-explain-title::before {
    content: "";
    display: none;
}

.ai-explain-content {
    color: var(--text-secondary, #a1a8b8);
    line-height: 1.55;
    white-space: pre-wrap;
}
/* DNS Map header spacing tweaks */
.dns-map-panel { margin-top: 12px; }
.map-header { margin-top: 8px; }
.map-header .title { font-weight: 600; color: var(--text-primary); }
.map-header .subtitle { color: var(--text-secondary); }
/* ===== DNS Checker: Métricas visibles (rcode + tiempo) ===== */
.dns-checker-page .server-meta { grid-template-columns: repeat(5, auto); }
.dns-checker-page .server-meta .rcode { color: var(--text-secondary); }
/* Overlay local dentro del panel izquierdo del DNS Checker */
.dns-checker-page .dns-server-list { position: relative; }
.dns-checker-page .dns-server-list .loading-overlay {
    position: absolute; /* sobrescribe fixed para que cubra solo la columna */
    inset: 0;
    z-index: 20; /* por encima del contenido de la lista */
    background: rgba(0, 0, 0, 0.40);
}