:root {
    --primary-color: #1a1a1a;
    --secondary-color: #333;
    --accent-color: #e50914;
    --text-color: #f5f5f5;
    --text-secondary: #b3b3b3;
    --bg-color: #121212;
    --card-bg: #1e1e1e;
    --font-main: 'Inter', sans-serif;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.site-header {
    background-color: var(--primary-color);
    padding: 2rem 0;
    text-align: center;
    margin-bottom: 2rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.site-header h1 {
    font-weight: 400;
    font-size: clamp(1.5rem, 4vw, 2.5rem);
}

.site-header .film-count {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

.filters {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 2rem;
    align-items: center;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.filter-group label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.filter-select {
    padding: 0.5rem 1rem;
    border-radius: 4px;
    border: 1px solid var(--secondary-color);
    background-color: var(--card-bg);
    color: var(--text-color);
    font-family: var(--font-main);
    min-width: 200px;
}

.film-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.film-card {
    background-color: var(--card-bg);
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.film-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
}

.film-poster {
    width: 100%;
    height: auto;
    aspect-ratio: 2/3;
    object-fit: cover;
    display: block;
    cursor: pointer;
}

.film-details {
    padding: 1rem;
}

.film-title {
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.film-meta {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.3rem;
}

.no-results {
    grid-column: 1 / -1;
    text-align: center;
    color: var(--text-secondary);
}

.chart-container {
    background-color: var(--card-bg);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 2rem;
    overflow: hidden;
}

.chart-container h2 {
    margin-bottom: 1.5rem;
    font-weight: 400;
    color: var(--text-color);
    font-size: 1.2rem;
}

.site-footer {
    background-color: var(--primary-color);
    padding: 1.5rem 0;
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Accessibility focus styles */
a:focus, button:focus, select:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .filters {
        flex-direction: column;
        align-items: stretch;
    }
    
    .film-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 1.5rem;
    }
    
    .site-header .film-count {
        font-size: 1rem;
    }
    
    .chart-container {
        padding: 1rem;
    }
    
    .chart-container h2 {
        font-size: 1.1rem;
        margin-bottom: 1rem;
    }
    
    /* Make charts smaller on mobile */
    #genre-pie-chart, #year-timeline-chart {
        max-height: 300px;
    }
}

@media (max-width: 480px) {
    .film-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: 1rem;
    }
    
    .film-title {
        font-size: 1rem;
    }
    
    .film-meta {
        font-size: 0.8rem;
    }
    
    .site-header .film-count {
        font-size: 0.9rem;
    }
    
    .chart-container h2 {
        font-size: 1rem;
    }
    
    /* Make charts even smaller on very small screens */
    #genre-pie-chart, #year-timeline-chart {
        max-height: 250px;
    }
}

/* Dark mode preference */
@media (prefers-color-scheme: light) {
    :root {
        --primary-color: #f5f5f5;
        --secondary-color: #e0e0e0;
        --text-color: #333;
        --text-secondary: #666;
        --bg-color: #ffffff;
        --card-bg: #f9f9f9;
    }
}