:root {
    --primary-color: #0f172a;
    --accent-color: #ea580c;
    --bg-color: #f8fafc;
    --surface-color: #ffffff;
    --text-color: #1e293b;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --card-shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
}

body.dark-mode {
    --primary-color: #f8fafc;
    --accent-color: #f97316;
    --bg-color: #0f172a;
    --surface-color: #1e293b;
    --text-color: #f1f5f9;
    --text-muted: #94a3b8;
    --border-color: #334155;
    --card-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.5);
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
}

.navbar {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

body.dark-mode .navbar {
    background-color: rgba(15, 23, 42, 0.95);
    border-bottom: 1px solid var(--border-color);
}

.navbar-brand {
    font-weight: 700;
    color: var(--text-color) !important;
}

.nav-link {
    color: var(--text-muted) !important;
    font-weight: 500;
}

.nav-link:hover, .nav-link.active {
    color: var(--accent-color) !important;
}

.hero-section {
    position: relative;
    padding: 8rem 0 6rem;
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    color: white;
    border-radius: 0 0 2rem 2rem;
    margin-bottom: 4rem;
    overflow: hidden;
}

.hero-bg-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('https://images.pexels.com/photos/120049/pexels-photo-120049.jpeg?auto=compress&cs=tinysrgb&w=1600');
    background-size: cover;
    background-position: center;
    opacity: 0.2;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.search-card {
    background-color: var(--surface-color);
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: 0 10px 25px -5px rgb(0 0 0 / 0.1);
    margin-top: 2rem;
    border: 1px solid var(--border-color);
}

.form-control, .form-select {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
}

.form-control:focus, .form-select:focus {
    background-color: var(--bg-color);
    border-color: var(--accent-color);
    color: var(--text-color);
    box-shadow: 0 0 0 2px rgba(234, 88, 12, 0.2);
}

.btn-primary {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    padding: 0.75rem 1.5rem;
    font-weight: 600;
}

.btn-primary:hover {
    background-color: #c2410c;
    border-color: #c2410c;
}

.section-title {
    font-weight: 700;
    margin-bottom: 2rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -10px;
    width: 60px;
    height: 4px;
    background-color: var(--accent-color);
    border-radius: 2px;
}

.car-card {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    height: 100%;
}

.car-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--card-shadow);
}

.car-img-top {
    height: 220px;
    object-fit: cover;
}

.car-card-body {
    padding: 1.5rem;
}

.price-tag {
    color: var(--accent-color);
    font-weight: 700;
    font-size: 1.25rem;
}

.spec-item {
    color: var(--text-muted);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.spec-item i {
    color: var(--accent-color);
}

.footer {
    background-color: var(--surface-color);
    border-top: 1px solid var(--border-color);
    padding: 4rem 0 2rem;
    margin-top: 4rem;
}

/* Dark mode toggler */
.theme-toggle {
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: background-color 0.2s;
}

.theme-toggle:hover {
    background-color: rgba(128, 128, 128, 0.1);
}