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

:root {
    --primary-color: #4A90E2;
    --secondary-color: #5CB3FF;
    --dark-bg: #1a1a2e;
    --card-bg: #16213e;
    --text-color: #e4e4e4;
    --text-muted: #a0a0a0;
    --accent: #0f3460;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: linear-gradient(135deg, var(--dark-bg) 0%, var(--accent) 100%);
    min-height: 100vh;
}

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

/* Header */
header {
    background: rgba(22, 33, 62, 0.9);
    backdrop-filter: blur(10px);
    padding: 2rem 0;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

header h1 {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.tagline {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* Main Content */
main {
    padding: 4rem 0;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 12px rgba(74, 144, 226, 0.2);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.card h2 {
    color: var(--secondary-color);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.card p {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.btn {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 0.75rem 2rem;
    border-radius: 25px;
    text-decoration: none;
    transition: all 0.3s ease;
    font-weight: 500;
}

.btn:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(74, 144, 226, 0.4);
}

/* Document Pages */
.doc-header {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
    text-align: center;
}

.doc-header h1 {
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
    font-size: 2.5rem;
}

.doc-header .date {
    color: var(--text-muted);
    font-style: italic;
}

.back-link {
    display: inline-block;
    color: var(--primary-color);
    text-decoration: none;
    margin-bottom: 1rem;
    transition: color 0.3s ease;
}

.back-link:hover {
    color: var(--secondary-color);
}

.doc-content {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 3rem;
    margin-bottom: 2rem;
    line-height: 1.8;
}

.doc-content h2 {
    color: var(--secondary-color);
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-size: 1.8rem;
}

.doc-content h3 {
    color: var(--primary-color);
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    font-size: 1.4rem;
}

.doc-content h4 {
    color: var(--text-color);
    margin-top: 1rem;
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

.doc-content p {
    margin-bottom: 1rem;
    color: var(--text-muted);
}

.doc-content ul, .doc-content ol {
    margin-left: 2rem;
    margin-bottom: 1rem;
    color: var(--text-muted);
}

.doc-content li {
    margin-bottom: 0.5rem;
}

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

/* Footer */
footer {
    background: rgba(22, 33, 62, 0.9);
    padding: 2rem 0;
    text-align: center;
    margin-top: 4rem;
}

footer p {
    color: var(--text-muted);
}

/* Responsive */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    .card-grid {
        grid-template-columns: 1fr;
    }

    .doc-content {
        padding: 1.5rem;
    }
}