/* --- Global Reset & Variables --- */
:root {
    --primary-color: #003366; /* Classic Academic Navy */
    --secondary-color: #b3a369; /* Gold for accents */
    --text-dark: #333333;
    --text-light: #666666;
    --white: #ffffff;
    --bg-light: #f4f7f6;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --radius: 8px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--bg-light);
    color: var(--text-dark);
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    text-decoration: none;
    color: inherit;
}

/* --- Header --- */
.header {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 1rem 0;
    box-shadow: var(--shadow);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav a {
    margin-left: 20px;
    color: rgba(255, 255, 255, 0.8);
    transition: color 0.3s;
}

.nav a:hover, .nav a.active {
    color: var(--secondary-color);
}

/* --- Hero Section --- */
.hero {
    background: linear-gradient(rgba(0, 51, 102, 0.8), rgba(0, 51, 102, 0.8)), url('https://images.unsplash.com/photo-1541339907198-e08756dedf3f?ixlib=rb-1.2.1&auto=format&fit=crop&w=1950&q=80');
    background-size: cover;
    background-position: center;
    color: var(--white);
    padding: 4rem 0;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.hero p {
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* --- Archive Section --- */
.archive-container {
    padding: 3rem 0;
}

.year-block {
    background: var(--white);
    border-radius: var(--radius);
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
    border-left: 5px solid var(--secondary-color);
}

.year-block h2 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.4rem;
    display: flex;
    align-items: center;
    gap: 10px;
    border-bottom: 1px solid #eee;
    padding-bottom: 10px;
}

/* Grid for semester cards */
.semester-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

/* Download Card Styling */
.download-card {
    display: flex;
    align-items: center;
    background-color: #f9f9f9;
    padding: 1.5rem;
    border-radius: var(--radius);
    border: 1px solid #e0e0e0;
    transition: transform 0.2s, box-shadow 0.2s;
}

.download-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.1);
    background-color: #fff;
    border-color: var(--secondary-color);
}

.download-card .icon {
    font-size: 2.5rem;
    color: #e74c3c; /* PDF Red */
    margin-right: 20px;
}

.download-card .details h3 {
    margin-bottom: 5px;
    color: var(--text-dark);
}

.download-card .btn-download {
    font-size: 0.9rem;
    color: var(--primary-color);
    font-weight: 600;
}

/* --- Footer --- */
.footer {
    background-color: #222;
    color: #aaa;
    text-align: center;
    padding: 2rem 0;
    margin-top: auto;
}

.footer p {
    margin-bottom: 5px;
    font-size: 0.9rem;
}

/* --- Mobile Responsiveness --- */
@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 15px;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .year-block {
        padding: 1.5rem;
    }
}