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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    color: #333;
    line-height: 1.6;
}

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

header {
    text-align: center;
    padding: 40px 0;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 15px;
    margin-bottom: 30px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

h1 {
    font-size: 2.8rem;
    color: #2c3e50;
    margin-bottom: 10px;
    background: linear-gradient(45deg, #3498db, #2ecc71);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    font-size: 1.2rem;
    color: #7f8c8d;
}

.search-container {
    margin: 20px auto;
    max-width: 600px;
}

.search-box {
    width: 100%;
    padding: 15px 20px;
    font-size: 1.1rem;
    border: 2px solid #3498db;
    border-radius: 50px;
    outline: none;
    transition: all 0.3s ease;
}

.search-box:focus {
    border-color: #2ecc71;
    box-shadow: 0 0 15px rgba(52, 152, 219, 0.3);
}

.category {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 30px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.category-title {
    font-size: 1.8rem;
    color: #2c3e50;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 3px solid #3498db;
    display: flex;
    align-items: center;
}

.category-title::before {
    content: "";
    display: inline-block;
    width: 12px;
    height: 12px;
    background: #3498db;
    border-radius: 50%;
    margin-right: 10px;
}

.links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
}

.link-item {
    background: white;
    border-radius: 10px;
    padding: 20px;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
    border: 1px solid #e0e0e0;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.link-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    border-color: #3498db;
}

.link-icon {
    width: 60px;
    height: 60px;
    background: #f8f9fa;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 15px;
    font-size: 24px;
}

.link-title {
    font-weight: bold;
    color: #2c3e50;
    margin-bottom: 5px;
    font-size: 1.1rem;
}

.link-desc {
    color: #7f8c8d;
    font-size: 0.9rem;
}

footer {
    text-align: center;
    padding: 30px 0;
    color: #7f8c8d;
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .links-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
}

@media (max-width: 480px) {
    .links-grid {
        grid-template-columns: 1fr;
    }
    
    h1 {
        font-size: 1.8rem;
    }
}