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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f5f5f5;
}

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

header {
    background: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    padding: 1rem 0;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header h1 {
    font-size: 1.5rem;
}

header h1 a {
    text-decoration: none;
    color: #333;
}

header nav {
    display: flex;
    gap: 2rem;
}

header nav a {
    text-decoration: none;
    color: #666;
    transition: color 0.3s;
}

header nav a:hover {
    color: #007bff;
}

main {
    min-height: calc(100vh - 200px);
    padding: 2rem 0;
}

.hero {
    text-align: center;
    padding: 3rem 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 10px;
    margin-bottom: 3rem;
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.tool-category {
    margin-bottom: 3rem;
}

.tool-category h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: #333;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #007bff;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.tool-card {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    color: inherit;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
    display: block;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.tool-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.tool-card h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: #333;
}

.tool-card p {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.tool-views {
    font-size: 0.85rem;
    color: #999;
}

footer {
    background: #333;
    color: #fff;
    padding: 2rem 0;
    margin-top: 3rem;
}

footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

footer nav {
    display: flex;
    gap: 1.5rem;
}

footer nav a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s;
}

footer nav a:hover {
    color: #fff;
}

@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        gap: 1rem;
    }
    
    header nav {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .hero h2 {
        font-size: 2rem;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    footer .container {
        flex-direction: column;
        gap: 1rem;
    }
}