/* Navigation */
nav {
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--card-light);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.dark-mode nav {
    background-color: var(--card-dark);
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: inherit;
    font-weight: 500;
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--primary);
}

/* Hero Section */
.hero {
    padding: 5rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #f3f4f6 0%, #ffffff 100%);
}

.dark-mode .hero {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    color: var(--primary);
}

.hero p {
    font-size: 1.25rem;
    color: #64748b;
    max-width: 800px;
    margin: 0 auto 2rem;
}

/* Tool Grid */
.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    padding: 4rem 0;
}

.tool-card {
    background: var(--card-light);
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    border: 1px solid #e5e7eb;
}

.dark-mode .tool-card {
    background: var(--card-dark);
    border-color: #334155;
}

.tool-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    border-color: var(--primary);
}

.tool-card i {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

/* Footer */
footer {
    background-color: var(--text-dark);
    color: white;
    padding: 4rem 2rem;
    margin-top: 5rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
    max-width: 1200px;
    margin: 0 auto;
}

.footer-col h4 {
    margin-bottom: 1.5rem;
    color: var(--primary);
}

.footer-col ul {
    list-style: none;
    padding: 0;
}

.footer-col ul li {
    margin-bottom: 0.75rem;
}

.footer-col a {
    color: #cbd5e1;
    text-decoration: none;
    transition: var(--transition);
}

.footer-col a:hover {
    color: white;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 2.25rem;
    }
}