:root {
    --primary-color: #0077B5;
    --secondary-color: #00A0DC;
    --dark-color: #283E4A;
    --light-color: #F3F6F8;
    --text-color: #333333;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    color: var(--text-color);
    background-color: var(--light-color);
    padding-top: 70px; /* Add padding to account for fixed header */
}

/* Header Styles */
.header {
    background-color: white;
    z-index: 1000;
    transition: box-shadow 0.3s ease;
}

.logo {
    width: 40px;
    height: 40px;
}

.logo-title {
    color: var(--primary-color);
    font-size: 2rem;
    font-weight: 600;
    margin-left: 1rem;
}

/* Category Styles */
.category-title {
    color: var(--dark-color);
    font-weight: 600;
    position: relative;
    padding-bottom: 0.5rem;
}

.category-title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 60px;
    height: 3px;
    background-color: var(--primary-color);
}

/* Tool Card Styles */
.tool-card {
    background: white;
    border-radius: 8px;
    padding: 1.5rem;
    height: 100%;
    transition: transform 0.2s, box-shadow 0.2s;
    border: 1px solid rgba(0,0,0,0.1);
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.card-icon {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.tool-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--dark-color);
}

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

.tool-card .btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
}

.tool-card .btn-primary:hover {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
}

/* Footer Styles */
.footer {
    background-color: white;
    color: var(--text-color);
}

.footer a {
    color: var(--primary-color);
}

.footer a:hover {
    color: var(--secondary-color);
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .logo-title {
        font-size: 1.5rem;
    }
    
    .category-title {
        font-size: 1.5rem;
    }
    
    .tool-card {
        padding: 1rem;
    }
}