:root {
    --bg-primary: #1e1e2e;
    --bg-secondary: #2d2d44;
    --bg-tertiary: #3d3d5c;
    --text-primary: #e0e0e0;
    --text-secondary: #b0b0b0;
    --accent: #7aa2f7;
    --accent-hover: #89b4f9;
    --border: #4d4d6b;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 40px 20px;
}

header {
    text-align: center;
    margin-bottom: 50px;
    padding-bottom: 30px;
    border-bottom: 2px solid var(--border);
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

header .subtitle {
    font-size: 1.1em;
    color: var(--text-secondary);
}

main {
    padding: 20px 0;
}

.assignments-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.assignment-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px;
    transition: all 0.3s ease;
    cursor: pointer;
}

.assignment-card:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: 0 8px 16px rgba(122, 162, 247, 0.15);
}

.assignment-card a {
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.assignment-title {
    font-size: 1.3em;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 10px;
    transition: color 0.3s ease;
}

.assignment-card:hover .assignment-title {
    color: var(--accent-hover);
}

.assignment-description {
    color: var(--text-secondary);
    font-size: 0.95em;
    margin-bottom: 15px;
    flex-grow: 1;
}

.assignment-path {
    color: var(--text-secondary);
    font-size: 0.85em;
    font-family: 'Monaco', 'Courier New', monospace;
    opacity: 0.7;
}

.loading {
    text-align: center;
    color: var(--text-secondary);
    padding: 40px;
    font-style: italic;
}

.error {
    background-color: #4a3f3f;
    border-left: 4px solid #ff6b6b;
    padding: 15px;
    border-radius: 4px;
    color: #ffb3b3;
    margin: 20px 0;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 1.8em;
    }
    
    .assignments-grid {
        grid-template-columns: 1fr;
    }
    
    .container {
        padding: 20px 15px;
    }
}