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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 50%, #7e22ce 100%);
    min-height: 100vh;
    color: #333;
    line-height: 1.6;
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.95);
    min-height: 100vh;
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.3);
}

/* Header */
header {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    color: white;
    padding: 3rem 2rem;
    text-align: center;
    border-bottom: 3px solid #7e22ce;
}

header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    font-style: italic;
}

/* Navigation */
.main-nav {
    padding: 2rem;
}

.nav-section {
    margin-bottom: 3rem;
}

.nav-section h2 {
    color: #2c3e50;
    font-size: 1.8rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #7e22ce;
}

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

/* Navigation Cards */
.nav-card {
    display: block;
    padding: 1.5rem;
    background: white;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.nav-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 20px rgba(126, 34, 206, 0.3);
    border-color: #7e22ce;
}

.nav-card h3 {
    color: #2c3e50;
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.nav-card p {
    color: #666;
    font-size: 0.95rem;
    line-height: 1.5;
}

/* Footer */
footer {
    background: #2c3e50;
    color: white;
    text-align: center;
    padding: 2rem;
    margin-top: 3rem;
}

footer a {
    color: #7e22ce;
    text-decoration: none;
    font-weight: 600;
}

footer a:hover {
    color: #a855f7;
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .main-nav {
        padding: 1rem;
    }
    
    .nav-links {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .nav-card {
        padding: 1rem;
    }
}

/* Loading Animation */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.nav-card {
    animation: fadeIn 0.5s ease-out;
}

/* Accessibility */
.nav-card:focus {
    outline: 3px solid #7e22ce;
    outline-offset: 2px;
}

a:focus {
    outline: 2px solid #7e22ce;
    outline-offset: 2px;
}