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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

header {
    text-align: center;
    padding: 2rem 1rem;
    color: white;
}

header h1 {
    font-size: 3rem;
    margin-bottom: 0.5rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

header p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto;
    opacity: 0.9;
}

.search-container {
    background: white;
    padding: 2rem;
    margin: 2rem auto;
    max-width: 1200px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
}

#searchInput {
    flex: 1;
    min-width: 300px;
    padding: 1rem 1.5rem;
    font-size: 1.1rem;
    border: 2px solid #ddd;
    border-radius: 50px;
    outline: none;
    transition: border-color 0.3s;
}

#searchInput:focus {
    border-color: #667eea;
}

#categoryFilter {
    padding: 1rem 1.5rem;
    font-size: 1.1rem;
    border: 2px solid #ddd;
    border-radius: 50px;
    background: white;
    cursor: pointer;
}

#clearFilter {
    padding: 1rem 2rem;
    font-size: 1.1rem;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: background 0.3s;
}

#clearFilter:hover {
    background: #5a67d8;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.tool-card {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
    opacity: 1;
    transform: translateY(0);
}

.tool-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
}

.tool-card.hidden {
    display: none;
}

.tool-header {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
}

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

.tool-name {
    font-size: 1.5rem;
    font-weight: bold;
    color: #333;
}

.tool-category {
    background: #667eea;
    color: white;
    padding: 0.3rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

.tool-description {
    color: #666;
    margin-bottom: 1.5rem;
    line-height: 1.5;
}

.tool-link {
    display: inline-block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 0.8rem 2rem;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 500;
    transition: transform 0.3s;
}

.tool-link:hover {
    transform: scale(1.05);
}

footer {
    text-align: center;
    padding: 2rem;
    color: white;
    background: rgba(0,0,0,0.1);
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    
    .search-container {
        flex-direction: column;
        padding: 1.5rem;
    }
    
    #searchInput {
        min-width: auto;
    }
}