:root {
    --grad-1: linear-gradient(90deg, rgb(68, 144, 190),rgb(251, 254, 241));
    --grad-2: linear-gradient(90deg, rgb(160, 222, 219),rgb(3, 165, 209));
    --grad-btn: linear-gradient(0deg, rgba(26, 228, 244, 0.15) 0%,rgba(50, 206, 35, 0.15) 100%),linear-gradient(90deg, rgb(44, 56, 250),rgb(88, 219, 228));
    --bg-color: #f8f9fa;
    --text-color: #333;
    --card-bg: #fff;
    --border-color: #ddd;
}

[data-theme="dark"] {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --card-bg: #1e1e1e;
    --border-color: #333;
    --grad-1: linear-gradient(90deg, #1a2a6c, #b21f1f, #fdbb2d);
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    transition: background-color 0.3s, color 0.3s;
}

header {
    background: var(--grad-1);
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: #fff;
    text-decoration: none;
}

.nav-links a {
    color: #fff;
    text-decoration: none;
    margin-left: 1.5rem;
    font-weight: 500;
}

.btn {
    background: var(--grad-btn);
    color: white;
    padding: 10px 20px;
    border-radius: 25px;
    text-decoration: none;
    display: inline-block;
    border: none;
    cursor: pointer;
    font-weight: 600;
    transition: transform 0.2s;
}

.btn:hover { transform: translateY(-2px); }

.hero {
    padding: 4rem 0;
    text-align: center;
    background: var(--grad-2);
    color: white;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

.ranking-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.rank-number {
    font-size: 2rem;
    font-weight: 900;
    color: #ccc;
    min-width: 40px;
}

.banner-img {
    width: 468px;
    height: 60px;
    object-fit: cover;
    border-radius: 4px;
}

.site-info h3 { margin: 0 0 5px 0; }
.site-info p { margin: 0; font-size: 0.9rem; color: #666; }

footer {
    padding: 2rem 0;
    text-align: center;
    background: var(--card-bg);
    border-top: 1px solid var(--border-color);
    margin-top: 3rem;
}

.theme-toggle {
    cursor: pointer;
    padding: 5px 10px;
    border-radius: 15px;
    border: 1px solid #fff;
    color: #fff;
    font-size: 0.8rem;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1rem;
    margin: 2rem 0;
}

.cat-item {
    background: var(--card-bg);
    padding: 1rem;
    text-align: center;
    border-radius: 8px;
    text-decoration: none;
    color: var(--text-color);
    border: 1px solid var(--border-color);
    transition: all 0.2s;
}

.cat-item:hover {
    background: var(--grad-2);
    color: white;
}