* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

:root {
    --primary: #4361ee;
    --secondary: #3f37c9;
    --accent: #4895ef;
    --light: #f8f9fa;
    --dark: #212529;
    --success: #4cc9f0;
    --warning: #f72585;
    --gray: #6c757d;
    --card-bg: #ffffff;
    --shadow: rgba(0, 0, 0, 0.1);
}

body {
    background: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
    color: var(--dark);
    line-height: 1.6;
    min-height: 100vh;
    padding: 0;
    margin: 0;
}

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

header {
    background: linear-gradient(to right, var(--primary), var(--secondary));
    color: white;
    padding: 2rem 0;
    text-align: center;
    box-shadow: 0 4px 12px var(--shadow);
    margin-bottom: 2rem;
    border-radius: 0 0 10px 10px;
}

header h1 {
    font-size: 2.8rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

header p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto;
    opacity: 0.9;
}

.search-container {
    max-width: 600px;
    margin: 2rem auto;
    position: relative;
}

.search-container input {
    width: 100%;
    padding: 15px 20px;
    border-radius: 50px;
    border: none;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    font-size: 1.1rem;
    transition: all 0.3s ease;
}

.search-container input:focus {
    outline: none;
    box-shadow: 0 5px 20px rgba(67, 97, 238, 0.2);
}

.search-container button {
    position: absolute;
    right: 10px;
    top: 10px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.search-container button:hover {
    background: var(--secondary);
    transform: scale(1.05);
}

.categories {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
    margin-top: 2rem;
}

.category-card {
    background: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 20px var(--shadow);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.category-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(67, 97, 238, 0.2);
}

.card-header {
    background: linear-gradient(to right, var(--accent), var(--primary));
    color: white;
    padding: 20px;
    text-align: center;
}

.card-header i {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.card-header h3 {
    font-size: 1.5rem;
    margin: 0;
}

.card-content {
    padding: 20px;
    flex-grow: 1;
}

.card-content p {
    color: var(--gray);
    margin-bottom: 20px;
}

.articles {
    list-style: none;
}

.articles li {
    padding: 10px 0;
    border-bottom: 1px solid #eee;
}

.articles li:last-child {
    border-bottom: none;
}

.articles a {
    color: var(--dark);
    text-decoration: none;
    display: flex;
    align-items: center;
    transition: all 0.2s ease;
}

.articles a:hover {
    color: var(--primary);
    transform: translateX(5px);
}

.articles a i {
    margin-right: 10px;
    color: var(--accent);
}

.card-footer {
    padding: 15px 20px;
    background: #f8f9fa;
    text-align: center;
}

.view-all {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s ease;
}

.view-all:hover {
    color: var(--secondary);
}

footer {
    background: var(--dark);
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 3rem;
    border-radius: 10px 10px 0 0;
}

footer p {
    opacity: 0.8;
    margin-top: 10px;
}

@media (max-width: 768px) {
    .categories {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
    
    header h1 {
        font-size: 2.2rem;
    }
}

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