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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background-color: #f5f7fa;
    color: #2c3e50;
    line-height: 1.6;
}

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

header {
    text-align: center;
    margin-bottom: 40px;
}

h1 {
    font-size: 2.5em;
    color: #2c3e50;
    margin-bottom: 20px;
}

.search-box {
    max-width: 600px;
    margin: 0 auto;
}

.search-box input {
    width: 100%;
    padding: 12px 20px;
    font-size: 16px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    outline: none;
    transition: border-color 0.3s ease;
}

.search-box input:focus {
    border-color: #4299e1;
}

.category {
    margin-bottom: 40px;
}

.category h2 {
    font-size: 1.8em;
    color: #2d3748;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #e2e8f0;
}

.site-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.site-card {
    display: flex;
    align-items: center;
    padding: 20px;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    text-decoration: none;
    color: inherit;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.site-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.site-icon {
    width: 50px;
    height: 50px;
    background-color: #4299e1;
    color: white;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    margin-right: 15px;
    flex-shrink: 0;
}

.site-info h3 {
    font-size: 1.2em;
    margin-bottom: 5px;
    color: #2d3748;
}

.site-info p {
    font-size: 0.9em;
    color: #718096;
}

.hidden {
    display: none;
}