/* ===== VOLKSWAGEN HANOI WEBSITE - MAIN STYLESHEET ===== */

@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;500;600;700&family=Oswald:wght@400;500;600;700&display=swap');

:root {
    --vw-blue: #001e50;
    --vw-light-blue: #003d82;
    --vw-silver: #c0c0c0;
    --vw-white: #ffffff;
    --vw-gray: #f5f5f5;
    --vw-dark-gray: #333333;
    --vw-gold: #d4af37;
    --shadow-sm: 0 1px 3px rgba(0, 30, 80, 0.08);
    --shadow-md: 0 2px 8px rgba(0, 30, 80, 0.1);
    --shadow-lg: 0 3px 12px rgba(0, 30, 80, 0.12);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --border-radius: 0px;
    --border-thin: 1px;
}

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

body {
    font-family: 'Montserrat', sans-serif;
    line-height: 1.6;
    color: var(--vw-dark-gray);
    background-color: var(--vw-white);
    overflow-x: hidden;
    font-weight: 400;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Oswald', sans-serif;
    font-weight: 600;
    line-height: 1.2;
    color: var(--vw-blue);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }

/* ===== HEADER & NAVIGATION ===== */
.header {
    background: var(--vw-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
    border-bottom: var(--border-thin) solid #e0e0e0;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--vw-blue);
    text-decoration: none;
    transition: var(--transition);
    font-family: 'Oswald', sans-serif;
}

.logo:hover {
    transform: scale(1.05);
}

.logo-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--vw-blue), var(--vw-light-blue));
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 1.2rem;
    border: var(--border-thin) solid var(--vw-blue);
}

/* Logo Image - Nếu dùng ảnh thay vì icon */
.logo-image {
    width: 50px;
    height: 50px;
    object-fit: contain;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
    position: relative;
}

.nav-menu li {
    position: relative;
}

.nav-menu a {
    color: var(--vw-dark-gray);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: 0.5rem 0;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.9rem;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--vw-blue);
    transition: var(--transition);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--vw-blue);
}

/* Dropdown Menu */
.dropdown {
    position: relative;
}

.dropdown-content {
    display: none;
    position: absolute;
    top: 100%;
    left: -50%;
    background: white;
    min-width: 650px;
    max-width: 90vw;
    box-shadow: var(--shadow-lg);
    border: var(--border-thin) solid #e0e0e0;
    border-radius: var(--border-radius);
    padding: 1rem;
    z-index: 1000;
    margin-top: 0.5rem;
}

.dropdown:hover .dropdown-content {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem;
    border: var(--border-thin) solid #eee;
    border-radius: var(--border-radius);
    text-decoration: none;
    color: var(--vw-dark-gray);
    transition: var(--transition);
}

.dropdown-item:hover {
    border-color: var(--vw-blue);
    background: var(--vw-gray);
}

.dropdown-item-image {
    width: 70px;
    height: 70px;
    background: var(--vw-gray);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    border-radius: var(--border-radius);
    border: var(--border-thin) solid #ddd;
}

.dropdown-item-info h4 {
    font-size: 0.85rem;
    margin: 0;
    font-weight: 600;
}

.dropdown-item-info p {
    font-size: 0.75rem;
    color: #666;
    margin: 0.25rem 0 0 0;
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-toggle span {
    width: 25px;
    height: 2px;
    background: var(--vw-blue);
    transition: var(--transition);
}

/* ===== HERO SECTION ===== */
.hero-main {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-image: url(../images/volkswagen.jpg);
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    background-repeat: no-repeat;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, transparent 0%, rgba(0, 30, 80, 0.4) 100%);
    z-index: 1;
}

.hero-main-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
    padding: 2rem;
    max-width: 1000px;
    margin: 0 auto;
    animation: fadeInUp 1.2s ease-out;
}

.hero-main-title {
    color: white;
    font-size: clamp(2.5rem, 8vw, 5.5rem);
    font-weight: 700;
    letter-spacing: 0.15em;
    margin-bottom: 1.5rem;
    text-shadow: 3px 3px 10px rgba(0, 0, 0, 0.5);
    line-height: 1.1;
    white-space: nowrap;
}

.hero-main-subtitle {
    font-size: clamp(1rem, 3vw, 1.3rem);
    margin-bottom: 3rem;
    opacity: 0.95;
    font-weight: 300;
    letter-spacing: 0.08em;
    line-height: 1.6;
    text-shadow: 2px 2px 6px rgba(0, 0, 0, 0.4);
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-hero-primary,
.btn-hero-secondary {
    display: inline-block;
    padding: 1.1rem 2.8rem;
    font-size: clamp(0.9rem, 2vw, 1.05rem);
    font-weight: 600;
    letter-spacing: 0.1em;
    text-decoration: none;
    border: var(--border-thin) solid rgba(255, 255, 255, 0.6);
    border-radius: var(--border-radius);
    transition: var(--transition);
    text-transform: uppercase;
    font-family: 'Oswald', sans-serif;
    background: linear-gradient(
        135deg,
        rgba(255, 255, 255, 0.15),
        rgba(255, 255, 255, 0.05)
    );
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 4px 20px rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.btn-hero-primary {
    background: white;
    color: var(--vw-blue);
}

.btn-hero-primary:hover {
    background: transparent;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.3);
}

.btn-hero-secondary {
    background: transparent;
    color: white;
}

.btn-hero-secondary:hover {
    background: linear-gradient(
        135deg,
        rgba(255, 255, 255, 0.9),
        rgba(255, 255, 255, 0.8)
    );
    color: var(--vw-blue);
    transform: translateY(-3px);
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.3);
}

/* ===== BUTTONS ===== */
.btn {
    padding: 0.9rem 2.2rem;
    border: var(--border-thin) solid;
    border-radius: var(--border-radius);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-block;
    text-align: center;
    font-family: 'Oswald', sans-serif;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.btn-primary {
    background: var(--vw-blue);
    color: white;
    border-color: var(--vw-blue);
}

.btn-primary:hover {
    background: var(--vw-light-blue);
    border-color: var(--vw-light-blue);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: transparent;
    color: var(--vw-blue);
    border-color: var(--vw-blue);
}

.btn-secondary:hover {
    background: var(--vw-blue);
    color: white;
    transform: translateY(-2px);
}

.btn-blue {
    background: var(--vw-blue);
    color: white;
    border-color: var(--vw-blue);
}

.btn-blue:hover {
    background: var(--vw-light-blue);
    border-color: var(--vw-light-blue);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background: transparent;
    color: var(--vw-blue);
    border: var(--border-thin) solid var(--vw-blue);
}

.btn-outline:hover {
    background: var(--vw-blue);
    color: white;
    transform: translateY(-2px);
}

/* ===== SECTIONS ===== */
.section {
    padding: 5rem 2rem;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    font-size: 2.8rem;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.1rem;
    color: #666;
    max-width: 700px;
    margin: 0 auto;
    font-weight: 400;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

/* ===== FEATURED SECTION ===== */
.featured-section {
    background: linear-gradient(180deg, #ffffff 0%, #f8f9fa 100%);
}

.featured-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-top: 3rem;
}

@media (min-width: 640px) {
    .featured-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .featured-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 2rem;
    }
}

@media (min-width: 1280px) {
    .featured-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.featured-card {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    cursor: pointer;
    border: var(--border-thin) solid #e0e0e0;
}

.featured-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--vw-blue);
}

.featured-card-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, #f5f5f5 0%, #e8e8e8 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid var(--vw-blue);
}

.featured-card-content {
    padding: 1.5rem 1.2rem;
}

.featured-card-title {
    font-size: 1.15rem;
    color: var(--vw-blue);
    margin-bottom: 0.5rem;
    font-weight: 600;
    line-height: 1.3;
}

.featured-card-subtitle {
    color: #666;
    font-size: 0.85rem;
    margin-bottom: 1rem;
    font-weight: 400;
}

.featured-card-price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--vw-blue);
    margin: 1rem 0;
    letter-spacing: -0.02em;
    font-family: 'Oswald', sans-serif;
}

.featured-card-specs {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.6rem;
    margin: 1rem 0;
    padding-top: 1rem;
    border-top: 1px solid #eee;
}

.featured-spec-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.8rem;
    color: #666;
}

.featured-spec-icon {
    width: 16px;
    height: 16px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.featured-card-button {
    display: block;
    width: 100%;
    padding: 0.9rem;
    background: var(--vw-blue);
    color: white;
    text-align: center;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: 0.05em;
    transition: var(--transition);
    margin-top: 1rem;
    text-transform: uppercase;
    border: var(--border-thin) solid var(--vw-blue);
    font-family: 'Oswald', sans-serif;
}

.featured-card-button:hover {
    background: var(--vw-light-blue);
    border-color: var(--vw-light-blue);
    transform: translateY(-1px);
}

/* Toggle All Cars Button */
.toggle-cars-btn {
    margin-top: 2rem;
    text-align: center;
}

.cars-collapsed .featured-card:nth-child(n+7) {
    display: none;
}

/* ===== EXPERIENCE BANNER ===== */
.experience-banner {
    position: relative;
    min-height: 450px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(0, 30, 80, 0.97) 0%, rgba(0, 61, 130, 0.95) 100%),
                url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1920 500"><rect fill="%23001e50" width="1920" height="500"/><circle cx="200" cy="250" r="100" fill="rgba(212,175,55,0.1)"/><circle cx="1720" cy="250" r="150" fill="rgba(212,175,55,0.08)"/></svg>');
    background-size: cover;
    background-position: center;
    margin: 4rem 0;
    overflow: hidden;
}

.experience-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 30% 50%, transparent 0%, rgba(0, 30, 80, 0.3) 100%);
    z-index: 1;
}

.experience-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
    padding: 4rem 2rem;
    max-width: 900px;
    margin: 0 auto;
}

.experience-title {
    color: white;
    font-size: clamp(2rem, 6vw, 3.5rem);
    font-weight: 700;
    letter-spacing: 0.12em;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.4);
}

.experience-subtitle {
    font-size: clamp(0.95rem, 2.5vw, 1.15rem);
    margin-bottom: 2.5rem;
    opacity: 0.95;
    line-height: 1.8;
    font-weight: 300;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.experience-buttons {
    display: flex;
    gap: 1.2rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-experience,
.btn-experience-outline {
    display: inline-block;
    padding: 1rem 2.2rem;
    font-size: clamp(0.85rem, 2vw, 1rem);
    font-weight: 600;
    letter-spacing: 0.08em;
    text-decoration: none;
    border: var(--border-thin) solid white;
    border-radius: var(--border-radius);
    transition: var(--transition);
    text-transform: uppercase;
    font-family: 'Oswald', sans-serif;
}

.btn-experience {
    background: white;
    color: var(--vw-blue);
}

.btn-experience:hover {
    background: var(--vw-blue);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.3);
}

.btn-experience-outline {
    background: transparent;
    color: white;
}

.btn-experience-outline:hover {
    background: white;
    color: var(--vw-blue);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.3);
}

/* ===== CAR GRID ===== */
.car-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.car-card {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    cursor: pointer;
    border: var(--border-thin) solid #e0e0e0;
}

.car-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--vw-blue);
}

.car-image {
    width: 100%;
    height: 220px;
    object-fit: cover;
    background: var(--vw-gray);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--vw-silver);
    border-bottom: 1px solid var(--vw-blue);
}

.car-content {
    padding: 1.5rem;
}

.car-title {
    font-size: 1.4rem;
    color: var(--vw-blue);
    margin-bottom: 0.5rem;
}

.car-subtitle {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.car-price {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--vw-blue);
    margin: 1rem 0;
    font-family: 'Oswald', sans-serif;
}

.car-specs {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin: 1rem 0;
    padding: 1rem 0;
    border-top: 1px solid #eee;
}

.spec-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    color: #666;
}

.spec-icon {
    width: 18px;
    height: 18px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* ===== FILTERS ===== */
.filters {
    background: white;
    padding: 1.2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    margin-bottom: 3rem;
    border: var(--border-thin) solid #e0e0e0;
}

.filter-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    align-items: flex-end;
}

.filter-item {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    flex: 1;
    min-width: 160px;
}

.filter-item label {
    font-weight: 600;
    color: var(--vw-blue);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-family: 'Oswald', sans-serif;
}

.filter-item select,
.filter-item input {
    padding: 0.65rem 0.9rem;
    border: var(--border-thin) solid #ddd;
    border-radius: var(--border-radius);
    font-size: 0.9rem;
    font-family: 'Montserrat', sans-serif;
    transition: var(--transition);
    background: white;
}

.filter-item select:focus,
.filter-item input:focus {
    outline: none;
    border-color: var(--vw-blue);
    box-shadow: 0 0 0 1px var(--vw-blue);
}

/* ===== FORMS ===== */
.form-container {
    max-width: 700px;
    margin: 0 auto;
    background: white;
    padding: 2.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    border: var(--border-thin) solid #e0e0e0;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--vw-blue);
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    font-family: 'Oswald', sans-serif;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.9rem;
    border: var(--border-thin) solid #ddd;
    border-radius: var(--border-radius);
    font-size: 0.95rem;
    font-family: 'Montserrat', sans-serif;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--vw-blue);
    box-shadow: 0 0 0 1px var(--vw-blue);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* ===== PRODUCT DETAIL ===== */
.product-detail {
    max-width: 1400px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

.product-main {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 3rem;
    margin-bottom: 4rem;
}

.product-gallery {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.main-image {
    width: 100%;
    height: 450px;
    object-fit: cover;
    border-radius: var(--border-radius);
    background: var(--vw-gray);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
    color: var(--vw-silver);
    border: var(--border-thin) solid #e0e0e0;
}

/* ===== PRODUCT SLIDER STYLES ===== */
.product-slider-container {
    position: relative;
    width: 100%;
    overflow: hidden;
    border: 1px solid #e0e0e0;
}

.slider-main-image {
    width: 100%;
    height: 450px;
    object-fit: cover;
    display: block;
    background: var(--vw-gray);
    transition: opacity 0.3s ease;
}

.slider-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 30, 80, 0.6);
    color: white;
    border: none;
    cursor: pointer;
    font-size: 2.5rem;
    font-weight: bold;
    padding: 0.5rem 1rem;
    z-index: 10;
    transition: var(--transition);
    opacity: 0.7;
    height: 80px;
}

.slider-nav:hover {
    background: var(--vw-blue);
    opacity: 1;
}

.slider-nav.prev {
    left: 0;
}

.slider-nav.next {
    right: 0;
}

.slider-thumbnails {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
    overflow-x: auto;
    padding: 0.5rem;
}

.slider-thumbnail {
    width: 80px;
    height: 60px;
    object-fit: cover;
    border: 2px solid #ddd;
    cursor: pointer;
    opacity: 0.6;
    transition: var(--transition);
    flex-shrink: 0;
}

.slider-thumbnail:hover,
.slider-thumbnail.active {
    border-color: var(--vw-blue);
    opacity: 1;
}

.product-info {
    padding: 2rem;
}

.product-name {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.product-tagline {
    color: #666;
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

.product-price {
    font-size: 2.3rem;
    font-weight: 700;
    color: var(--vw-gold);
    margin: 2rem 0;
    font-family: 'Oswald', sans-serif;
}

.product-actions {
    display: flex;
    gap: 1rem;
    margin: 2rem 0;
}

/* ===== TABS ===== */
.tabs {
    margin: 3rem 0;
}

.tab-buttons {
    display: flex;
    gap: 1rem;
    border-bottom: 1px solid #eee;
    margin-bottom: 2rem;
}

.tab-button {
    padding: 1rem 2rem;
    background: none;
    border: none;
    font-size: 1rem;
    font-weight: 600;
    color: #666;
    cursor: pointer;
    transition: var(--transition);
    border-bottom: 2px solid transparent;
    font-family: 'Oswald', sans-serif;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.tab-button.active {
    color: var(--vw-blue);
    border-bottom-color: var(--vw-blue);
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease-in;
}

.tab-content.active {
    display: block;
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.2rem;
}

.spec-box {
    background: var(--vw-gray);
    padding: 1.3rem;
    border-radius: var(--border-radius);
    border-left: 2px solid var(--vw-blue);
}

.spec-label {
    font-weight: 600;
    color: var(--vw-blue);
    margin-bottom: 0.5rem;
    font-family: 'Oswald', sans-serif;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
}

.spec-value {
    font-size: 1.05rem;
    color: var(--vw-dark-gray);
}

/* ===== FEATURES LIST ===== */
.features-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.2rem;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem;
    background: var(--vw-gray);
    border-radius: var(--border-radius);
    border: var(--border-thin) solid #e0e0e0;
}

.feature-icon {
    width: 36px;
    height: 36px;
    background: var(--vw-blue);
    color: white;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-weight: bold;
}

.feature-text {
    flex: 1;
}

.feature-text h4 {
    margin-bottom: 0.25rem;
    font-size: 1rem;
}

.feature-text p {
    color: #666;
    font-size: 0.9rem;
}

/* ===== CONTACT ===== */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    max-width: 1400px;
    margin: 0 auto;
}

.contact-info {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    border: var(--border-thin) solid #e0e0e0;
}

.info-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid #eee;
}

.info-item:last-child {
    border-bottom: none;
}

.info-icon {
    width: 50px;
    height: 50px;
    background: var(--vw-blue);
    color: white;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.info-content h3 {
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

.info-content p {
    color: #666;
    line-height: 1.8;
}

.map-container {
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    height: 400px;
    background: var(--vw-gray);
    display: flex;
    align-items: center;
    justify-content: center;
    border: var(--border-thin) solid #e0e0e0;
}

/* ===== ADMIN ===== */
.admin-login {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--vw-blue), var(--vw-light-blue));
}

.login-box {
    background: white;
    padding: 3rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 450px;
    border: var(--border-thin) solid #e0e0e0;
}

.admin-dashboard {
    background: var(--vw-gray);
    min-height: 100vh;
}

.admin-header {
    background: var(--vw-blue);
    color: white;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: var(--border-thin) solid var(--vw-light-blue);
}

.admin-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.stat-card {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    gap: 1.5rem;
    border: var(--border-thin) solid #e0e0e0;
}

.stat-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--vw-blue), var(--vw-light-blue));
    color: white;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

.stat-info h3 {
    font-size: 2rem;
    margin-bottom: 0.25rem;
}

.stat-info p {
    color: #666;
}

.admin-section {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    margin-bottom: 2rem;
    border: var(--border-thin) solid #e0e0e0;
}

.admin-section h2 {
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead {
    background: var(--vw-gray);
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #eee;
}

th {
    font-weight: 600;
    color: var(--vw-blue);
    font-family: 'Oswald', sans-serif;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
}

tr:hover {
    background: var(--vw-gray);
}

.action-buttons {
    display: flex;
    gap: 0.5rem;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
}

.btn-edit {
    background: #4CAF50;
    color: white;
    border-color: #4CAF50;
}

.btn-delete {
    background: #f44336;
    color: white;
    border-color: #f44336;
}

/* ===== MODAL ===== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease-in;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp 0.3s ease-out;
    border: var(--border-thin) solid #e0e0e0;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.modal-close {
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: #666;
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--vw-blue);
    transform: rotate(90deg);
}

/* ===== FOOTER ===== */
.footer {
    background: var(--vw-blue);
    color: white;
    padding: 3rem 2rem 1.5rem;
    border-top: var(--border-thin) solid var(--vw-light-blue);
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    color: white;
    margin-bottom: 1.5rem;
}

.footer-links {
    list-style: none;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    display: block;
    padding: 0.5rem 0;
    transition: var(--transition);
}

.footer-links a:hover {
    color: white;
    padding-left: 5px;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-icon {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: var(--transition);
    border: var(--border-thin) solid rgba(255, 255, 255, 0.2);
}

.social-icon:hover {
    background: var(--vw-gold);
    transform: translateY(-3px);
    border-color: var(--vw-gold);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.8);
}

/* ===== ANIMATIONS ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* ===== UTILITIES ===== */
.text-center {
    text-align: center;
}

.mt-3 {
    margin-top: 3rem;
}

.mb-3 {
    margin-bottom: 3rem;
}

.hidden {
    display: none !important;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .hero-main {
        height: 85vh;
        min-height: 550px;
    }
    
    .hero-main-title {
        font-size: 3rem;
    }
    
    .product-main {
        grid-template-columns: 1fr;
    }
    
    .contact-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    /* ===== MOBILE NAVIGATION ===== */
    .nav-menu {
        position: fixed;
        top: 80px;
        right: -100%;
        width: 280px;
        height: calc(100vh - 80px);
        background: white;
        flex-direction: column;
        padding: 2rem 1.5rem;
        box-shadow: var(--shadow-lg);
        transition: var(--transition);
        align-items: flex-start;
        gap: 0;
    }
    
    .nav-menu li {
        width: 100%;
        border-bottom: 1px solid #eee;
    }
    
    .nav-menu a {
        display: block;
        padding: 1.2rem 0;
        font-size: 1rem;
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .mobile-toggle {
        display: flex;
    }
    
    /* ===== DROPDOWN MOBILE FIX ===== */
    .dropdown-content {
        position: fixed !important;
        left: 5% !important;
        right: 5%;
        top: 70px !important;
        min-width: auto;
        width: 90%;
        max-height: 70vh;
        overflow-y: auto;
    }
    
    .dropdown:hover .dropdown-content {
        display: block;
        grid-template-columns: 1fr;
    }
    
    .dropdown-item {
        flex-direction: row;
        padding: 0.6rem;
    }
    
    .dropdown-item-image {
        width: 60px;
        height: 60px;
        font-size: 2rem;
        flex-shrink: 0;
    }
    
    .dropdown-item-info {
        flex: 1;
        min-width: 0;
    }
    
    .dropdown-item-info h4 {
        font-size: 0.8rem;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }
    
    .dropdown-item-info p {
        font-size: 0.7rem;
    }
    
    /* ===== HERO MOBILE ===== */
    .hero-main {
        height: 100vh;
        min-height: 600px;
        background-attachment: scroll; /* Fix parallax on mobile */
    }
    
    .hero-main-title {
        font-size: 2.5rem;
        letter-spacing: 0.1em;
    }
    
    .hero-main-subtitle {
        font-size: 1rem;
        margin-bottom: 2.5rem;
    }
    
    .btn-hero-primary,
    .btn-hero-secondary {
        padding: 0.95rem 2.2rem;
        font-size: 0.95rem;
        width: auto;
        min-width: 220px;
    }
    
    /* ===== EXPERIENCE BANNER MOBILE ===== */
    .experience-banner {
        min-height: 400px;
        margin: 3rem 0;
    }
    
    .experience-content {
        padding: 3rem 1.5rem;
    }
    
    .experience-buttons {
        flex-direction: column;
        gap: 1rem;
    }
    
    .btn-experience,
    .btn-experience-outline {
        width: 100%;
        max-width: 280px;
        padding: 0.9rem 1.8rem;
    }
    
    /* ===== FEATURED GRID MOBILE ===== */
    .featured-grid {
        grid-template-columns: 1fr;
        gap: 1.2rem;
    }
    
    .featured-card {
        box-shadow: 0 2px 10px rgba(0, 30, 80, 0.08);
        width: 100%;
        min-width: 0;
    }

    .featured-card .product-title {
        word-wrap: break-word;
        overflow-wrap: break-word;
        word-break: break-word;
    }

    .featured-card .product-icon {
        display: none;
    }
    
    /* ===== FILTERS MOBILE ===== */
    .filter-group {
        flex-direction: column;
        width: 100%;
    }
    
    .filter-item {
        width: 100%;
    }
    
    /* ===== FOOTER MOBILE ===== */
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
    
    /* ===== PRODUCT DETAIL MOBILE ===== */
    .product-main {
        grid-template-columns: 1fr !important;
        gap: 1rem !important;
    }
    
    .slider-main-image {
        height: 400px !important;
        object-fit: cover;
    }
    
    .product-gallery {
        width: 100%;
        margin-bottom: 1rem;
    }

    .product-info {
        padding: 1.5rem 1rem !important;
    }

    .product-name {
        font-size: 1.8rem !important;
    }
    
    .product-price {
        font-size: 1.8rem !important;
    }

    .slider-nav {
        font-size: 1.5rem;
        padding: 0.25rem 0.75rem;
        height: 60px;
    }
    
    .product-actions {
        flex-direction: column !important;
        gap: 0.75rem !important;
    }
    
    .product-actions a {
        width: 100% !important;
        text-align: center;
    }
    
    /* ===== TABS MOBILE ===== */
    .tab-buttons {
        overflow-x: auto;
        flex-wrap: nowrap;
    }
    
    .tab-button {
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
        white-space: nowrap;
    }
    
    .product-detail {
        padding: 2rem 1rem;
    }
    
    /* ===== GENERAL MOBILE ===== */
    .section-title h2 {
        font-size: 2rem;
    }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
}

@media (max-width: 480px) {
    .section {
        padding: 3rem 1rem;
    }
    
    .hero-main-content {
        padding: 1.5rem;
    }
    
    .hero-main-title {
        font-size: 2rem;
        margin-bottom: 1rem;
    }
    
    .hero-main-subtitle {
        font-size: 0.95rem;
        margin-bottom: 2rem;
    }
    
    .btn-hero-primary,
    .btn-hero-secondary {
        padding: 0.85rem 1.8rem;
        font-size: 0.9rem;
        min-width: 200px;
    }
    
    /* ===== DROPDOWN EXTRA SMALL PHONES ===== */
    .dropdown-content {
        left: 2.5% !important;
        right: 2.5%;
        width: 95%;
    }
    
    .dropdown-item-image {
        width: 50px;
        height: 50px;
        font-size: 1.8rem;
    }
    
    .featured-card-image {
        height: 180px;
        font-size: 3.5rem;
    }
    
    .featured-card-content {
        padding: 1.2rem 1rem;
    }
    
    .featured-card-title {
        font-size: 1.05rem;
    }
    
    .featured-card-price {
        font-size: 1.3rem;
    }
    
    .experience-title {
        font-size: 1.8rem;
    }
    
    .experience-subtitle {
        font-size: 0.9rem;
        margin-bottom: 2rem;
    }
    
    .btn-experience,
    .btn-experience-outline {
        padding: 0.85rem 1.5rem;
        font-size: 0.85rem;
    }
    
    .form-container {
        padding: 2rem 1.2rem;
    }
    
    .btn {
        padding: 0.8rem 1.8rem;
    }
    
    .nav-container {
        padding: 1rem 1.5rem;
    }
    
    .logo {
        font-size: 1.1rem;
    }
    
    .logo-icon {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    
    .logo-image {
        width: 40px;
        height: 40px;
    }
    
    .slider-main-image {
        height: 350px !important;
    }
    
    .product-name {
        font-size: 1.5rem !important;
    }
    
    .product-price {
        font-size: 1.6rem !important;
    }
}

/* ===== FLOATING PHONE BUTTON ===== */
.floating-phone-button {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background-color: #001E50; /* Xanh đậm Volkswagen */
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 9998;
    box-shadow: 0 4px 20px rgba(0, 30, 80, 0.4);
    transition: all 0.3s ease;
    animation: phonePulse 2s infinite, phoneShake 1s ease-in-out infinite;
    border: 3px solid #ffffff;
}

.floating-phone-button:hover {
    transform: scale(1.1);
    background-color: #002B7F; /* Xanh đậm hơn chút khi hover */
    box-shadow: 0 6px 25px rgba(0, 30, 80, 0.6);
}


.floating-phone-button svg {
    width: 28px;
    height: 28px;
    fill: white;
    animation: none; /* Tắt animation trên SVG để chỉ button rung */
}

.floating-phone-button:active {
    transform: scale(0.95);
}

/* Animation keyframes */
@keyframes phoneShake {
    0%, 100% { transform: rotate(0deg); }
    10%, 30%, 50%, 70%, 90% { transform: rotate(-8deg); }
    20%, 40%, 60%, 80% { transform: rotate(8deg); }
}

@keyframes phonePulse {
    0%, 100% { 
        box-shadow: 0 4px 20px rgba(0, 200, 83, 0.4);
    }
    50% { 
        box-shadow: 0 4px 20px rgba(0, 200, 83, 0.4), 0 0 0 15px rgba(0, 200, 83, 0);
    }
}

/* Responsive cho mobile */
@media (max-width: 768px) {
    .floating-phone-button {
        bottom: 20px;
        right: 20px;
        width: 55px;
        height: 55px;
    }
    
    .floating-phone-button svg {
        width: 25px;
        height: 25px;
    }
}

li a[href^="tel:"] {
  display: inline;
  white-space: nowrap;
}