:root {
    --primary-color: #0056b3;
    --secondary-color: #343a40;
    --text-light: #f8f9fa;
    --text-dark: #212529;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    scroll-behavior: smooth;
}

.navbar {
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    border-bottom: 1px solid #eee;
}

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

.navbar-light .nav-link:hover {
    color: var(--primary-color) !important;
}

.hero-section {
    height: 80vh;
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('assets/img/engine-internals.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.service-card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.15) !important;
}

.service-card img {
    height: 200px;
    object-fit: cover;
}

.review-card {
    border: none;
    border-radius: 15px;
    background: #fff;
}

.review-text {
    font-style: italic;
    color: #555;
}

.review-author {
    font-weight: bold;
    color: var(--primary-color);
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    padding: 12px 30px;
    border-radius: 50px;
}

.btn-primary:hover {
    background-color: #004494;
    border-color: #004494;
}

.flag-btn {
    border: none;
    background: none;
    padding: 0;
    transition: transform 0.2s ease;
}

.flag-btn:hover {
    transform: scale(1.1);
}

.flag-btn img {
    border-radius: 2px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

#impressum {
    font-size: 0.9rem;
}

#impressum h2, #impressum h5 {
    color: var(--secondary-color);
}

.btn-success {
    background-color: #25d366;
    border-color: #25d366;
}

.btn-success:hover {
    background-color: #128c7e;
    border-color: #128c7e;
}

@media (max-width: 768px) {
    .hero-section {
        height: 60vh;
    }
    .display-3 {
        font-size: 2.5rem;
    }
}