body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    /* padding: 0; */
    background-color: var(--background-color);
    color: var(--text-color);
}

.page-header {
    text-align: center;
    padding: 4rem 2rem 2rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    margin-bottom: 3rem;
}

.page-header h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.page-header p {
    font-size: 1.2rem;
    opacity: 0.9;
}

.tool-categories {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.tool-category {
    margin-bottom: 4rem;
}

.tool-category h2 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 2rem;
    text-align: center;
}

.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    padding: 0 1rem;
}

.tool-card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 12px rgba(0, 0, 0, 0.1);
}

.tool-card a {
    display: block;
    text-decoration: none;
    color: inherit;
}

.tool-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.tool-card p {
    font-size: 1rem;
    color: var(--text-color);
    line-height: 1.6;
}

/* Responsive Design */
@media (max-width: 768px) {
    .page-header h1 {
        font-size: 2rem;
    }

    .tool-grid {
        grid-template-columns: 1fr;
    }

    .tool-card {
        padding: 1.5rem;
    }
}

/* Ads */
.ads {
    margin: 2rem 0;
    text-align: center;
}

.ads iframe {
    width: 100%;
    max-width: 728px;
    margin: 0 auto;
}