:root {
    --bg-color: #f8f9fa;
    --text-color: #212529;
    --header-color: #343a40;
    --card-bg-color: #ffffff;
    --card-shadow: 0 4px 8px rgba(0,0,0,0.05);
    --border-color: #dee2e6;
    --link-color: #0056b3;
    --link-hover-color: #003d80;
    --primary-color: #007bff;
    --primary-hover-color: #0056b3;
    --sub-category-border-color: #6c757d;
    --tooltip-bg-color: #343a40;
    --tooltip-text-color: #fff;
    --theme-btn-border-color: #ced4da;
    --theme-btn-bg-hover: rgba(0,0,0,0.05);
}

body.dark-mode {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --header-color: #ffffff;
    --card-bg-color: #1e1e1e;
    --card-shadow: 0 4px 12px rgba(0,0,0,0.4);
    --border-color: #333333;
    --link-color: #8ab4f8;
    --link-hover-color: #adcffc;
    --primary-color: #8ab4f8;
    --primary-hover-color: #adcffc;
    --sub-category-border-color: #888;
    --tooltip-bg-color: #e0e0e0;
    --tooltip-text-color: #121212;
    --theme-btn-border-color: #444;
    --theme-btn-bg-hover: rgba(255,255,255,0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', 'Noto Color Emoji';
    line-height: 1.6;
    margin: 0;
    padding: 20px;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

header h1 {
    font-size: 2rem;
    color: var(--header-color);
    margin: 0;
}

.lang-switcher button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.2s;
}

.lang-switcher button:hover {
    background-color: var(--primary-hover-color);
}

.lang-switcher button.active {
    background-color: var(--primary-hover-color);
    font-weight: bold;
}

#theme-toggle {
    background: none;
    border: 1px solid var(--theme-btn-border-color);
    color: var(--text-color);
    font-size: 1.2rem;
    cursor: pointer;
    border-radius: 5px;
    width: 44px;
    height: 44px;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0;
    line-height: 1;
    transition: background-color 0.2s, border-color 0.2s, transform 0.2s;
}

#theme-toggle:hover {
    background-color: var(--theme-btn-bg-hover);
}

#theme-toggle:active {
    transform: scale(0.9);
}

.category {
    margin-bottom: 3rem;
}

.category h2 {
    font-size: 1.75rem;
    color: var(--header-color);
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--primary-color);
}

.sub-category-title {
    font-size: 1.4rem;
    color: var(--text-color);
    margin-top: 2rem;
    margin-bottom: 1.2rem;
    padding-left: 10px;
    border-left: 3px solid var(--sub-category-border-color);
}

.sites-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.site-card {
    background-color: var(--card-bg-color);
    border-radius: 8px;
    box-shadow: var(--card-shadow);
    padding: 1.5rem;
    transition: transform 0.2s, box-shadow 0.2s;
    position: relative;
    /* overflow: hidden; */
}

.site-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.1);
}

.site-card h3 {
    font-size: 1.25rem;
    margin-top: 0;
    margin-bottom: 0.5rem;
}

.site-card h3 a {
    text-decoration: none;
    color: var(--link-color);
    transition: color 0.2s;
}

.site-card h3 a:hover {
    color: var(--link-hover-color);
}

.site-card .description-snippet {
    font-size: 0.95rem;
    color: var(--text-color);
    opacity: 0.7;
    /* height: 60px; */ /* Removed fixed height to prevent cutting off text */
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
}

.site-card .tooltip {
    visibility: hidden;
    opacity: 0;
    background-color: var(--tooltip-bg-color);
    color: var(--tooltip-text-color);
    text-align: left;
    border-radius: 6px;
    padding: 10px;
    position: absolute;
    z-index: 1;
    bottom: 105%;
    left: 50%;
    transform: translateX(-50%);
    width: 300px;
    transition: opacity 0.3s;
    font-size: 0.9rem;
    box-shadow: var(--card-shadow);
}

.site-card:hover .tooltip {
    visibility: visible;
    opacity: 1;
}

.site-card .tooltip::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    margin-left: -5px;
    border-width: 5px;
    border-style: solid;
    border-color: var(--tooltip-bg-color) transparent transparent transparent;
}

footer {
    text-align: center;
    margin-top: 3rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-color);
    opacity: 0.7;
    font-size: 0.9rem;
}