:root {
    --color-bg: #000000;
    --color-text: #ffffff;
    --color-card: #121212;
    --color-border: #333333;
    --color-hover: #666666;
    --font-main: system-ui, -apple-system, sans-serif;
    --max-width: 1200px;
    --spacing: 2rem;
    --transition-speed: 0.2s;
}

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

body {
    background: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-main);
    line-height: 1.5;
    min-height: 100vh;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing);
}

/* Header styles */
.site-header {
    padding: var(--spacing) 0;
    border-bottom: 1px solid var(--color-border);
}

.site-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing);
}

.site-title a {
    color: var(--color-text);
    text-decoration: none;
    transition: opacity var(--transition-speed) ease;
}

.site-title a:hover {
    opacity: 0.8;
}

.site-subtitle {
    font-size: 3rem;
    text-align: center;
    margin: calc(var(--spacing) * 2) 0 0.5rem;
    font-weight: 500;
}

.site-subtitle-secondary {
    font-size: 1.5rem;
    text-align: center;
    margin-bottom: calc(var(--spacing) * 2);
    opacity: 0.8;
    font-weight: normal;
}

/* Search styles with improved accessibility */
.search-wrapper {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    opacity: 0.5;
    pointer-events: none;
}

.search-bar {
    width: 100%;
    padding: 1rem 1rem 1rem 3rem;
    font-size: 1.2rem;
    background: var(--color-card);
    border: 2px solid var(--color-border);
    color: var(--color-text);
    border-radius: 8px;
    transition: all var(--transition-speed) ease;
}

.search-bar:focus {
    outline: none;
    border-color: var(--color-hover);
    box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.1);
}

.search-stats {
    text-align: center;
    margin: 1rem 0 2rem;
    font-size: 1.1rem;
    opacity: 0.8;
}

/* Enhanced facts grid */
.facts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    padding: var(--spacing) 0;
}

.fact-card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 2rem;
    position: relative;
    transition: all var(--transition-speed) ease;
    min-height: 200px;
    overflow: hidden;
    cursor: pointer;
    text-decoration: none;
    color: var(--color-text);
    display: block;
}

.fact-card:hover {
    transform: translateY(-2px);
    border-color: var(--color-hover);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.fact-number {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    font-weight: bold;
    opacity: 0.8;
}

.fact-text {
    font-size: 1.4rem;
    margin-bottom: 3rem;
    line-height: 1.4;
}

.fact-badge {
    position: absolute;
    bottom: 2rem;
    left: 2rem;
    font-size: 0.85rem;
    padding: 0.3rem 0.8rem;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-text);
    transition: background var(--transition-speed) ease;
}

.fact-card:hover .fact-badge {
    background: rgba(255, 255, 255, 0.15);
}

.share-button {
    display: none;
}

/* Improved about section */
.about-section {
    margin-top: calc(var(--spacing) * 3);
    padding: var(--spacing) 0;
    border-top: 1px solid var(--color-border);
}

.about-title {
    font-size: 2rem;
    margin-bottom: var(--spacing);
}

/* Enhanced responsive design */
@media (max-width: 768px) {
    .facts-grid {
        grid-template-columns: 1fr;
    }

    .site-subtitle {
        font-size: 2rem;
    }

    .site-subtitle-secondary {
        font-size: 1.2rem;
    }

    .fact-text {
        font-size: 1.2rem;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing: 1.5rem;
    }

    .site-title {
        font-size: 2rem;
    }
}