* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #0ea5e9;
    --primary-dark: #0284c7;
    --success: #10b981;
    --bg: #0f172a;
    --bg-card: #1e293b;
    --text: #f1f5f9;
    --text-muted: #94a3b8;
    --border: #334155;
    --warning: #f59e0b;
    --error: #ef4444;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
header {
    text-align: center;
    padding: 30px 20px 25px;
    background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
    margin-bottom: 40px;
    border-radius: 12px;
    box-shadow: 0 15px 45px rgba(2, 132, 199, 0.4);
    position: relative;
    overflow: hidden;
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 100%);
    pointer-events: none;
}

.logo {
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: 8px;
    letter-spacing: -1px;
    position: relative;
    background: linear-gradient(135deg, #ffffff 0%, #e0e7ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-transform: uppercase;
}

.breadcrumb {
    font-size: 0.85rem;
    margin-bottom: 10px;
    opacity: 0.9;
}

.breadcrumb a {
    color: var(--text);
    text-decoration: none;
    transition: opacity 0.3s;
}

.breadcrumb a:hover {
    opacity: 0.8;
}

/* Format Hero Section */
.format-hero {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 40px 30px;
    margin-bottom: 30px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.format-icon {
    font-size: 4rem;
    margin-bottom: 20px;
    color: var(--primary);
}

.format-hero h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    color: var(--text);
}

.format-hero .extension {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.format-hero .description {
    font-size: 1rem;
    color: var(--text-muted);
    max-width: 800px;
    margin: 0 auto 30px;
    line-height: 1.8;
}

/* Quick Stats */
.quick-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-top: 30px;
}

.stat-item {
    background: var(--bg);
    padding: 20px;
    border-radius: 8px;
    border: 1px solid var(--border);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 5px;
}

.stat-value {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text);
}

/* Content Grid */
.content-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
    margin-bottom: 40px;
}

@media (min-width: 992px) {
    .content-grid {
        grid-template-columns: 2fr 1fr;
    }
}

/* Content Cards */
.content-card {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 25px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.content-card h2 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.content-card h3 {
    font-size: 1.3rem;
    margin-top: 25px;
    margin-bottom: 15px;
    color: var(--text);
}

.content-card p {
    margin-bottom: 15px;
    color: var(--text-muted);
    line-height: 1.8;
}

.content-card ul,
.content-card ol {
    margin-left: 25px;
    margin-bottom: 20px;
}

.content-card li {
    margin-bottom: 10px;
    color: var(--text-muted);
    line-height: 1.6;
}

.content-card li strong {
    color: var(--text);
}

/* Feature List */
.feature-list {
    list-style: none;
    margin-left: 0;
}

.feature-list li {
    padding-left: 30px;
    position: relative;
    margin-bottom: 15px;
}

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: bold;
    font-size: 1.2rem;
}

.feature-list.disadvantages li::before {
    content: '✗';
    color: var(--error);
}

/* Info Box */
.info-box {
    background: rgba(14, 165, 233, 0.1);
    border-left: 4px solid var(--primary);
    padding: 15px 20px;
    margin: 20px 0;
    border-radius: 4px;
}

.info-box.warning {
    background: rgba(245, 158, 11, 0.1);
    border-left-color: var(--warning);
}

.info-box.success {
    background: rgba(16, 185, 129, 0.1);
    border-left-color: var(--success);
}

/* Sidebar */
.sidebar .content-card {
    position: sticky;
    top: 20px;
}

/* CTA Buttons */
.cta-buttons {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-top: 25px;
}

.cta-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 15px 25px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.cta-btn.primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(14, 165, 233, 0.3);
}

.cta-btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(14, 165, 233, 0.4);
}

.cta-btn.secondary {
    background: var(--bg);
    color: var(--text);
    border: 2px solid var(--border);
}

.cta-btn.secondary:hover {
    border-color: var(--primary);
}

/* Related Formats */
.related-formats {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 15px;
    margin-top: 20px;
}

.format-badge {
    background: var(--bg);
    padding: 15px;
    border-radius: 8px;
    text-align: center;
    text-decoration: none;
    color: var(--text);
    border: 2px solid var(--border);
    transition: all 0.3s ease;
}

.format-badge:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
}

.format-badge .icon {
    font-size: 2rem;
    margin-bottom: 8px;
    color: var(--primary);
}

.format-badge .name {
    font-weight: 600;
    font-size: 0.9rem;
}

/* Technical Specs Table */
.specs-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

.specs-table tr {
    border-bottom: 1px solid var(--border);
}

.specs-table td {
    padding: 12px 0;
}

.specs-table td:first-child {
    color: var(--text-muted);
    font-weight: 600;
    width: 40%;
}

.specs-table td:last-child {
    color: var(--text);
}

/* Footer */
footer {
    text-align: center;
    padding: 25px 15px;
    margin-top: 40px;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.85rem;
}

footer a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

footer a:hover {
    color: var(--primary-dark);
}

/* Responsive */
@media (max-width: 768px) {
    .logo {
        font-size: 1.8rem;
    }

    .format-hero h1 {
        font-size: 1.8rem;
    }

    .format-icon {
        font-size: 3rem;
    }

    .content-card {
        padding: 20px;
    }

    .quick-stats {
        grid-template-columns: 1fr;
    }

    .related-formats {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }
}