* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --audi-black: #000000;
    --audi-red: #E61E26;
    --audi-silver: #C0C0C0;
    --audi-white: #FFFFFF;
    --audi-gray-light: #F5F5F5;
    --audi-gray: #666666;
    --audi-dark: #1A1A1A;
    --font-main: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --transition: all 0.3s ease;
}

body {
    font-family: var(--font-main);
    line-height: 1.6;
    color: var(--audi-dark);
    background: var(--audi-white);
}

.header {
    background: var(--audi-black);
    color: var(--audi-white);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

.header-inner {
    max-width: 1300px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    height: 80px;
}

.logo {
    font-size: 28px;
    font-weight: 900;
    letter-spacing: 2px;
    color: var(--audi-white);
    text-decoration: none;
}

.logo span {
    color: var(--audi-red);
}

.nav {
    display: flex;
    gap: 30px;
    list-style: none;
}

.nav a {
    color: var(--audi-white);
    text-decoration: none;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: var(--transition);
    padding: 8px 0;
    border-bottom: 2px solid transparent;
}

.nav a:hover, .nav a.active {
    color: var(--audi-red);
    border-bottom: 2px solid var(--audi-red);
}

.admin-link {
    color: var(--audi-red) !important;
    font-weight: bold !important;
}

.burger {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
}

.burger span {
    width: 30px;
    height: 3px;
    background: var(--audi-white);
    transition: var(--transition);
}

.hero {
    background: linear-gradient(135deg, #000 0%, #1a1a1a 100%);
    color: var(--audi-white);
    padding: 100px 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%23E61E26" fill-opacity="0.1" d="M0,224L48,213.3C96,203,192,181,288,181.3C384,181,480,203,576,224C672,245,768,267,864,261.3C960,256,1056,224,1152,213.3C1248,203,1344,213,1392,218.7L1440,224L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') no-repeat bottom;
    background-size: cover;
}

.hero h1 {
    font-size: 56px;
    font-weight: 900;
    letter-spacing: 3px;
    position: relative;
    z-index: 1;
}

.hero p {
    font-size: 20px;
    margin-top: 20px;
    color: var(--audi-silver);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
    z-index: 1;
}

.hero .btn {
    display: inline-block;
    margin-top: 30px;
    padding: 14px 40px;
    background: var(--audi-red);
    color: var(--audi-white);
    text-decoration: none;
    font-weight: bold;
    letter-spacing: 1px;
    border-radius: 5px;
    transition: var(--transition);
    position: relative;
    z-index: 1;
}

.hero .btn:hover {
    background: #c41720;
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(230,30,38,0.4);
}

.container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 80px 0;
}

.section-dark {
    background: var(--audi-dark);
    color: var(--audi-white);
}

.section-title {
    font-size: 36px;
    font-weight: 900;
    margin-bottom: 20px;
    text-align: center;
}

.section-subtitle {
    text-align: center;
    color: var(--audi-gray);
    margin-bottom: 50px;
    font-size: 18px;
}

.catalog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: 30px;
}

.model-card {
    background: var(--audi-white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 25px rgba(0,0,0,0.08);
    transition: var(--transition);
}

.model-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.model-card img {
    width: 100%;
    height: 240px;
    object-fit: cover;
    background: var(--audi-gray-light);
}

.model-card-body {
    padding: 20px;
}

.model-card-body h2 {
    font-size: 22px;
    margin-bottom: 10px;
}

.model-card-body h2 a {
    color: var(--audi-black);
    text-decoration: none;
}

.model-card-body h2 a:hover {
    color: var(--audi-red);
}

.model-badge {
    display: inline-block;
    background: var(--audi-black);
    color: var(--audi-white);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    margin-right: 5px;
    margin-bottom: 10px;
}

.model-specs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin: 15px 0;
    font-size: 14px;
    color: var(--audi-gray);
}

.model-specs strong {
    color: var(--audi-dark);
}

.btn-detail {
    display: inline-block;
    width: 100%;
    padding: 10px;
    background: var(--audi-black);
    color: var(--audi-white);
    text-decoration: none;
    text-align: center;
    border-radius: 5px;
    font-weight: bold;
    transition: var(--transition);
    border: 2px solid var(--audi-black);
}

.btn-detail:hover {
    background: var(--audi-white);
    color: var(--audi-black);
}

.model-hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    padding: 60px 0;
    align-items: center;
}

.model-hero-img img {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.2);
}

.model-hero-info h1 {
    font-size: 42px;
    font-weight: 900;
    margin-bottom: 10px;
}

.model-hero-info .generation {
    color: var(--audi-gray);
    font-size: 18px;
    margin-bottom: 20px;
}

.specs-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

.specs-table td {
    padding: 12px 15px;
    border-bottom: 1px solid #eee;
}

.specs-table td:first-child {
    font-weight: bold;
    color: var(--audi-gray);
    width: 180px;
}

.tech-section {
    padding: 60px 0;
}

.tech-section h2 {
    font-size: 28px;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 3px solid var(--audi-red);
    display: inline-block;
}

.history-content {
    font-size: 17px;
    line-height: 1.8;
    margin-bottom: 40px;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.gallery-grid img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    border-radius: 8px;
    transition: var(--transition);
    background: var(--audi-gray-light);
}

.gallery-grid img:hover {
    transform: scale(1.03);
}

.timeline {
    position: relative;
    padding: 40px 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 3px;
    height: 100%;
    background: var(--audi-red);
}

.timeline-item {
    display: flex;
    gap: 30px;
    margin-bottom: 50px;
    align-items: center;
}

.timeline-item:nth-child(odd) {
    flex-direction: row;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-year {
    font-size: 32px;
    font-weight: 900;
    color: var(--audi-red);
    min-width: 100px;
    text-align: center;
}

.timeline-content {
    background: var(--audi-white);
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    flex: 1;
}

.timeline-content h3 {
    margin-bottom: 10px;
}

.footer {
    background: var(--audi-black);
    color: var(--audi-silver);
    padding: 40px 20px;
    text-align: center;
}

.footer a {
    color: var(--audi-red);
    text-decoration: none;
}

@media (max-width: 768px) {
    .nav {
        display: none;
        position: absolute;
        top: 80px;
        left: 0;
        right: 0;
        background: var(--audi-black);
        flex-direction: column;
        padding: 20px;
        gap: 15px;
    }

    .nav.active {
        display: flex;
    }

    .burger {
        display: flex;
    }

    .hero h1 {
        font-size: 32px;
    }

    .model-hero {
        grid-template-columns: 1fr;
    }

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

    .timeline::before {
        left: 20px;
    }

    .timeline-item, .timeline-item:nth-child(even) {
        flex-direction: column;
        align-items: flex-start;
        padding-left: 50px;
    }
}