/* 
   ÁO DÀI THẢO NGUYÊN - CSS
   Luxury Dark Aesthetic
*/

:root {
    --primary: #c86c14; /* Amber/Orange from Logo */
    --primary-glow: rgba(200, 108, 20, 0.4);
    --secondary: #245c6c; /* Teal from Logo */
    --accent-gold: linear-gradient(135deg, #bf953f, #fcf6ba, #b38728, #fbf5b7, #aa771c); /* Gold gradient */
    --bg-dark: #070707;
    --bg-silk: #0f0f0f;
    --text-white: #f5f5f5;
    --text-muted: #888888;
    --gold: #d4af37;
    --transition-slow: all 0.8s cubic-bezier(0.19, 1, 0.22, 1);
    --transition: all 0.4s ease;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-white);
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, .logo-text {
    font-family: 'Playfair Display', serif;
    font-weight: 600;
}

.accent {
    color: var(--primary);
    font-style: italic;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 40px;
}

.py-100 {
    padding: 100px 0;
}

.text-center {
    text-align: center;
}

.separator {
    width: 60px;
    height: 3px;
    background-color: var(--primary);
    margin: 20px auto;
}

/* Mockup Navigation Modernized */
.navbar-mockup {
    padding-top: 40px;
    padding-bottom: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.brand-logo-container {
    width: 120px;
    height: 120px;
    margin-bottom: 20px;
    border-radius: 50%;
    overflow: hidden;
    background: transparent;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    border: 2px solid rgba(200, 108, 20, 0.3);
}

.brand-logo-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(1.1);
}

.brand-title {
    font-size: 1.8rem;
    line-height: 1.2;
    letter-spacing: 10px;
    margin-bottom: 30px;
    color: var(--text-white);
    text-align: center;
}

.brand-title span {
    font-size: 1.4rem;
    letter-spacing: 6px;
    font-weight: 300;
    opacity: 0.8;
}

.nav-links-mockup {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: 15px 0;
}

.flex-center {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.nav-links-mockup a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.75rem;
    letter-spacing: 3px;
    font-weight: 500;
    transition: var(--transition);
}

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

/* Language Switcher */
.lang-switcher {
    display: flex;
    gap: 6px;
    align-items: center;
    margin-left: 10px;
    border-left: 1px solid rgba(255,255,255,0.1);
    padding-left: 20px;
}

.lang-btn {
    font-size: 0.65rem !important;
    letter-spacing: 1px !important;
    padding: 4px 8px;
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 3px;
    color: var(--text-muted) !important;
    text-decoration: none;
    transition: var(--transition);
}

.lang-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff !important;
}

.lang-btn:hover {
    border-color: var(--primary);
    color: var(--primary) !important;
}

/* Mockup Hero with Studio Look (Manual BG Removal via CSS) */
.hero-mockup {
    background-color: var(--bg-dark);
    padding: 100px 0;
    position: relative;
    overflow: hidden;
}

.hero-container {
    display: flex;
    align-items: center;
    gap: 120px;
}

.hero-image {
    flex: 1.2;
    height: 800px;
    position: relative;
    background: #000; /* Solid studio black */
    overflow: hidden;
}

.hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    filter: brightness(0.95) contrast(1.05);
}

.hero-text {
    flex: 1;
}

.main-title {
    font-size: 5rem;
    line-height: 0.9;
    letter-spacing: -2px;
    margin: 20px 0;
}

.subtitle {
    font-size: 0.9rem;
    letter-spacing: 3px;
    color: var(--text-muted);
    margin-bottom: 40px;
}

.btn-outline-thin {
    border: 1px solid var(--text-muted);
    color: var(--text-white);
    padding: 12px 30px;
    letter-spacing: 2px;
    font-size: 0.8rem;
    text-decoration: none;
    transition: var(--transition);
}

.btn-outline-thin:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: transparent;
}

/* Mockup Collections */
.section-title {
    font-size: 2rem;
    letter-spacing: 8px;
    margin-bottom: 60px;
    font-weight: 300;
}

.collections-grid-mockup {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.coll-card {
    text-align: center;
    text-decoration: none;
    color: var(--text-white);
    display: block;
    transition: var(--transition);
}

.coll-card:hover {
    transform: translateY(-8px);
}

.card-img {
    height: 500px;
    margin-bottom: 30px;
    overflow: hidden;
    position: relative;
    background: #000;
}

.card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.card-content h3 {
    font-size: 1.5rem;
    letter-spacing: 5px;
    margin-bottom: 15px;
}

.card-subtitle {
    color: var(--gold);
    font-size: 0.85rem;
    letter-spacing: 1px;
    margin-bottom: 8px;
    opacity: 0.8;
}

.card-desc {
    color: var(--text-muted);
    font-size: 0.75rem;
    letter-spacing: 2px;
}

.coll-card:hover img {
    transform: scale(1.05);
    filter: brightness(1.1);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 16px 40px;
    text-decoration: none;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    font-size: 0.85rem;
    transition: var(--transition-slow);
    border-radius: 2px;
}

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

.btn-primary:hover {
    background-color: var(--primary-light);
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(200, 108, 20, 0.3);
}

.btn-outline {
    border: 1px solid var(--text-white);
    color: var(--text-white);
    margin-left: 20px;
}

.btn-outline:hover {
    background: var(--text-white);
    color: var(--bg-dark);
    transform: translateY(-5px);
}

/* Collections Grid */
.collections-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.collection-item {
    position: relative;
    overflow: hidden;
    height: 600px;
    background-color: var(--bg-light);
}

.collection-img {
    height: 100%;
    width: 100%;
    transition: var(--transition-slow);
}

.collection-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.7);
    transition: var(--transition-slow);
}

.collection-info {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 60px 40px;
    background: linear-gradient(to top, rgba(10,10,10,0.9), transparent);
}

.collection-info h3 {
    font-size: 2.2rem;
    margin-bottom: 10px;
}

.collection-info p {
    color: var(--text-muted);
    margin-bottom: 20px;
}

.link-arrow {
    text-decoration: none;
    color: var(--primary);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.collection-item:hover .collection-img img {
    transform: scale(1.05);
    filter: brightness(0.9);
}

/* Fabrics Showcase */
.fabrics-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.fabrics-text h2 {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 30px;
}

.fabrics-text p {
    color: var(--text-muted);
    margin-bottom: 30px;
}

.fabric-list {
    list-style: none;
    margin-bottom: 40px;
}

.fabric-list li {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 15px;
    color: var(--text-white);
    opacity: 0.9;
}

.fabric-list i {
    color: var(--primary);
}

.fabrics-visual img {
    width: 100%;
    border-radius: 4px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.5);
}

/* Bespoke Journey */
.journey-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.step {
    padding: 40px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
}

.step:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--primary);
    transform: translateY(-10px);
}

.step-num {
    font-size: 3rem;
    font-family: 'Playfair Display', serif;
    color: rgba(255, 255, 255, 0.1);
    margin-bottom: 20px;
    line-height: 1;
}

.step h4 {
    margin-bottom: 15px;
    font-size: 1.3rem;
}

.step p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Footer Icons Wrap */
.social-links {
    margin-top: 30px;
    display: flex;
    gap: 15px;
}

.social-links a {
    width: 40px;
    height: 40px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary);
    border-color: var(--primary);
}

/* Footer Links & Contact Info Styles */
.footer {
    background-color: var(--bg-light);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-logo {
    height: 80px;
    margin-bottom: 30px;
}

.footer-links h4, .footer-contact h4 {
    margin-bottom: 30px;
    font-size: 1.2rem;
    letter-spacing: 1px;
}

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

.footer-links ul li {
    margin-bottom: 15px;
}

.footer-links a {
    text-decoration: none;
    color: var(--text-muted);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary);
    padding-left: 5px;
}

.footer-contact p {
    margin-bottom: 20px;
    color: var(--text-muted);
    display: flex;
    gap: 15px;
    align-items: flex-start;
}

.footer-contact i {
    color: var(--primary);
    margin-top: 5px;
}

.copyright {
    padding-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s forwards;
    animation-delay: 0.5s;
}

.stagger-in {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s forwards;
    animation-delay: 0.3s;
}

/* Additional Luxury Touches */
.gold-text {
    background: var(--accent-gold);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 700;
}

section {
    position: relative;
}

section::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://www.transparenttextures.com/patterns/black-linen.png'); /* Silk texture */
    opacity: 0.2;
    pointer-events: none;
}

.nav-links {
    position: relative;
}

.nav-links .dropdown,
.nav-links-mockup .dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-content {
    display: none;
    position: absolute;
    background: rgba(15, 15, 15, 0.98);
    min-width: 250px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.8);
    z-index: 1001;
    border: 1px solid rgba(200, 108, 20, 0.15);
    padding: 10px 0;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    backdrop-filter: blur(10px);
}

.dropdown:hover .dropdown-content {
    display: block;
    animation: fadeIn 0.3s ease;
}

.dropdown-content a {
    color: var(--text-white);
    padding: 12px 20px;
    text-decoration: none;
    display: block;
    font-size: 0.8rem;
    letter-spacing: 1px;
    text-transform: none;
    transition: var(--transition);
}

.dropdown-content a:hover {
    background: rgba(200, 108, 20, 0.1);
    color: var(--primary);
    padding-left: 25px;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Gallery Filter Buttons */
.filter-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
}

.filter-btn {
    background: transparent;
    border: 1px solid rgba(255,255,255,0.15);
    color: var(--text-muted);
    padding: 10px 24px;
    font-size: 0.8rem;
    letter-spacing: 2px;
    cursor: pointer;
    transition: var(--transition);
    font-family: 'Inter', sans-serif;
    text-transform: uppercase;
}

.filter-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.filter-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

/* Gallery Grid */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
}

.gallery-item {
    position: relative;
    overflow: hidden;
    height: 450px;
    background: #000;
    cursor: pointer;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.gallery-item:hover img {
    transform: scale(1.08);
    filter: brightness(0.6);
}

.gallery-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 40px 30px;
    background: linear-gradient(to top, rgba(0,0,0,0.9), transparent);
    opacity: 0;
    transition: var(--transition);
}

.gallery-item:hover .gallery-overlay {
    opacity: 1;
}

.gallery-tag {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    font-size: 0.65rem;
    letter-spacing: 2px;
    padding: 4px 12px;
    margin-bottom: 10px;
    text-transform: uppercase;
}

.gallery-overlay h4 {
    font-size: 1.2rem;
    letter-spacing: 2px;
}

/* Responsive Styles */
@media (max-width: 1024px) {
    .main-title { font-size: 3.5rem; }
    .hero-container { flex-direction: column; gap: 40px; }
    .hero-image { height: 500px; flex: none; width: 100%; }
    .fabrics-layout { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .collections-grid-mockup { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .nav-links-mockup { display: none; }
    .main-title { font-size: 2.5rem; }
    .collections-grid-mockup { grid-template-columns: 1fr; }
    .card-img { height: 350px; }
    .hero-image { height: 400px; }
    .brand-title { font-size: 1.4rem; letter-spacing: 6px; }
}