/* ==========================================================================
   TRẦN QUANG MINH AUTO - LUXURY AUTOMOTIVE EDITORIAL DESIGN SYSTEM
   Style: Luxury Automotive / Premium Minimalism / Editorial Design
   ========================================================================== */

:root {
  /* Color Palette - Obsidian, Titanium & Champagne Gold */
  --bg-primary: #07080a;
  --bg-secondary: #0d0f13;
  --bg-card: #12151b;
  --bg-card-hover: #171b23;
  --bg-elevated: #1a1e27;
  --bg-glass: rgba(13, 15, 19, 0.75);
  
  --text-primary: #f5f6f8;
  --text-secondary: #a3acb9;
  --text-muted: #5e6776;
  --text-inverse: #07080a;
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.22);
  --border-focus: rgba(197, 165, 114, 0.5);

  --accent-gold: #c5a572;
  --accent-gold-light: #dfc79b;
  --accent-gold-dim: rgba(197, 165, 114, 0.15);
  --accent-silver: #94a3b8;
  --accent-line: rgba(255, 255, 255, 0.12);

  /* Typography */
  --font-serif: 'Cinzel', 'Playfair Display', Georgia, serif;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'Space Grotesk', monospace;

  /* Layout */
  --max-width: 1400px;
  --header-height: 84px;
  --section-spacing: 140px;
  --container-padding: 32px;
  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 8px;

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Base & Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  line-height: 1.65;
  overflow-x: hidden;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
}

::selection {
  background-color: var(--accent-gold);
  color: #000;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

button {
  background: none;
  border: none;
  font-family: inherit;
  cursor: pointer;
  color: inherit;
}

/* Typography Helpers */
.serif {
  font-family: var(--font-serif);
}

.mono {
  font-family: var(--font-mono);
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

/* Hairline Grid & Section Tags */
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--accent-gold);
  margin-bottom: 20px;
}

.section-tag::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 1px;
  background-color: var(--accent-gold);
}

.editorial-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: 0.04em;
  color: var(--text-primary);
  margin-bottom: 24px;
}

.editorial-lead {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-secondary);
  max-width: 680px;
  font-weight: 300;
}

/* Hairline Dividers */
.hairline {
  width: 100%;
  height: 1px;
  background-color: var(--border-subtle);
  border: none;
  margin: 0;
}

/* Buttons & Links (Strictly Non-commercial) */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 14px 28px;
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-normal);
  border-radius: var(--radius-sm);
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, rgba(197, 165, 114, 0.1), rgba(255, 255, 255, 0.05));
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.btn-primary:hover {
  border-color: var(--accent-gold);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
}

.btn-primary:hover::before {
  opacity: 1;
}

.btn-accent {
  background-color: var(--accent-gold);
  color: #0a0b0e;
  border: 1px solid var(--accent-gold);
}

.btn-accent:hover {
  background-color: var(--accent-gold-light);
  border-color: var(--accent-gold-light);
  color: #000;
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-secondary);
  padding: 10px 0;
  border-bottom: 1px solid transparent;
  transition: all var(--transition-fast);
}

.btn-ghost:hover {
  color: var(--accent-gold);
  border-bottom-color: var(--accent-gold);
}

.btn-ghost svg {
  transition: transform var(--transition-fast);
}

.btn-ghost:hover svg {
  transform: translateX(6px);
}

/* ==========================================================================
   HEADER / NAVIGATION
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 1000;
  background-color: rgba(7, 8, 10, 0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.site-header.scrolled {
  background-color: rgba(7, 8, 10, 0.92);
  border-bottom-color: var(--border-subtle);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-monogram {
  width: 38px;
  height: 38px;
  border: 1px solid var(--accent-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--accent-gold);
  letter-spacing: 1px;
  transition: all var(--transition-fast);
}

.brand-logo:hover .brand-monogram {
  background-color: var(--accent-gold);
  color: #000;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--text-primary);
  line-height: 1.2;
}

.brand-tagline {
  font-size: 0.65rem;
  font-family: var(--font-mono);
  letter-spacing: 0.22em;
  color: var(--accent-gold);
  text-transform: uppercase;
}

/* Nav Menu */
.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 32px;
}

.nav-link {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-secondary);
  position: relative;
  padding: 8px 0;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--accent-gold);
  transition: width var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
}

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

.header-action {
  display: flex;
  align-items: center;
}

.btn-header-cta {
  padding: 9px 18px;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
}

/* Mobile Menu Button */
.mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  cursor: pointer;
  z-index: 1010;
}

.mobile-toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background-color: var(--text-primary);
  transition: all var(--transition-fast);
}

.mobile-toggle.active span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.mobile-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-toggle.active span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* Mobile Drawer Overlay */
.mobile-nav-drawer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background-color: rgba(7, 8, 10, 0.98);
  backdrop-filter: blur(25px);
  z-index: 1005;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 40px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.mobile-nav-drawer.open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  text-align: center;
  margin-bottom: 40px;
}

.mobile-nav-link {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

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

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: var(--header-height);
  padding-bottom: 60px;
  overflow: hidden;
}

.hero-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.hero-backdrop-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: brightness(0.42) contrast(1.1);
  transform: scale(1.04);
  transition: transform 6s cubic-bezier(0.16, 1, 0.3, 1);
}

.hero-section:hover .hero-backdrop-img {
  transform: scale(1.0);
}

.hero-gradient {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at center, rgba(7, 8, 10, 0.3) 0%, rgba(7, 8, 10, 0.88) 85%),
              linear-gradient(to bottom, rgba(7, 8, 10, 0.4) 0%, rgba(7, 8, 10, 0.95) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 960px;
  margin: 0 auto;
  padding: 40px 20px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--accent-gold);
  margin-bottom: 24px;
}

.hero-badge-line {
  width: 32px;
  height: 1px;
  background-color: var(--accent-gold);
}

.hero-brand-name {
  font-family: var(--font-serif);
  font-size: clamp(1rem, 2vw, 1.4rem);
  letter-spacing: 0.32em;
  color: var(--text-secondary);
  text-transform: uppercase;
  margin-bottom: 16px;
  font-weight: 400;
}

.hero-headline {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 6.5vw, 5.25rem);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: 0.05em;
  color: #fff;
  margin-bottom: 18px;
  text-transform: uppercase;
}

.hero-subheadline {
  font-family: var(--font-serif);
  font-size: clamp(1.15rem, 2.5vw, 1.85rem);
  font-weight: 300;
  line-height: 1.4;
  letter-spacing: 0.04em;
  color: var(--accent-gold-light);
  margin-bottom: 24px;
  font-style: italic;
}

.hero-description {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 auto 36px;
  font-weight: 300;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 50px;
}

.hero-editorial-meta {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  padding-top: 36px;
  border-top: 1px solid var(--border-subtle);
  max-width: 820px;
  margin: 0 auto;
}

.meta-item {
  text-align: left;
}

.meta-number {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--accent-gold);
  margin-bottom: 4px;
}

.meta-label {
  font-size: 0.82rem;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
  font-weight: 400;
}

.hero-scroll-indicator {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.24em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.scroll-line {
  width: 1px;
  height: 36px;
  background: linear-gradient(to bottom, var(--accent-gold), transparent);
  animation: pulseScroll 2s infinite ease-in-out;
}

@keyframes pulseScroll {
  0% { transform: scaleY(0); transform-origin: top; opacity: 0; }
  50% { transform: scaleY(1); transform-origin: top; opacity: 1; }
  100% { transform: scaleY(1); transform-origin: bottom; opacity: 0; }
}

/* ==========================================================================
   SECTION: THE SHOWROOM
   ========================================================================== */
.section-showroom {
  padding: var(--section-spacing) 0;
  position: relative;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.showroom-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.showroom-narrative {
  padding-right: 20px;
}

.founder-highlight-callout {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 24px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-left: 3px solid var(--accent-gold);
  margin: 32px 0;
}

.callout-icon {
  color: var(--accent-gold);
}

.callout-content h4 {
  font-family: var(--font-serif);
  font-size: 1rem;
  letter-spacing: 0.1em;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.callout-content p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.principles-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-top: 36px;
}

.principle-item {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-subtle);
}

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

.principle-index {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.15em;
  color: var(--accent-gold);
  padding-top: 2px;
}

.principle-body h4 {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.principle-body p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.showroom-visual-wrapper {
  position: relative;
}

.showroom-visual-frame {
  position: relative;
  border: 1px solid var(--border-subtle);
  padding: 12px;
  background-color: var(--bg-card);
}

.showroom-img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: brightness(0.85) contrast(1.05);
  transition: transform var(--transition-slow);
}

.showroom-visual-frame:hover .showroom-img {
  transform: scale(1.02);
}

.showroom-caption {
  margin-top: 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--text-muted);
  text-transform: uppercase;
}

/* ==========================================================================
   SECTION: BRAND SHOWCASE (THE COLLECTION / 5 THƯƠNG HIỆU)
   ========================================================================== */
.section-brands {
  padding: var(--section-spacing) 0;
  position: relative;
  background-color: var(--bg-primary);
}

.brands-header-wrapper {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 60px;
}

/* Interactive Brand Tabs */
.brand-tab-bar {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 50px;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 16px;
}

.brand-tab-btn {
  font-family: var(--font-serif);
  font-size: 0.88rem;
  letter-spacing: 0.22em;
  padding: 10px 22px;
  color: var(--text-muted);
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  border-radius: var(--radius-sm);
  text-transform: uppercase;
}

.brand-tab-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-subtle);
}

.brand-tab-btn.active {
  color: var(--accent-gold);
  border-color: var(--accent-gold);
  background-color: var(--accent-gold-dim);
}

/* Brand Showcase Card / Spread */
.brand-display-stage {
  position: relative;
  min-height: 480px;
}

.brand-slide {
  display: none;
  grid-template-columns: 1.1fr 1fr;
  gap: 50px;
  align-items: center;
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  padding: 40px;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--transition-normal), transform var(--transition-normal);
}

.brand-slide.active {
  display: grid;
  opacity: 1;
  transform: translateY(0);
}

.brand-slide-visual {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border-subtle);
}

.brand-slide-img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  filter: brightness(0.85);
  transition: transform var(--transition-slow);
}

.brand-slide:hover .brand-slide-img {
  transform: scale(1.03);
}

.brand-slide-details {
  display: flex;
  flex-direction: column;
}

.brand-origin-pill {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--accent-gold);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.brand-display-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 3.5vw, 3rem);
  letter-spacing: 0.12em;
  color: #fff;
  margin-bottom: 8px;
  line-height: 1.1;
}

.brand-tagline-quote {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: var(--accent-gold-light);
  font-style: italic;
  margin-bottom: 18px;
  letter-spacing: 0.04em;
}

.brand-desc-body {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 24px;
}

.brand-attributes-grid {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 30px;
  padding-top: 18px;
  border-top: 1px solid var(--border-subtle);
}

.attribute-pill {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.attribute-pill::before {
  content: '';
  width: 4px;
  height: 4px;
  background-color: var(--accent-gold);
}

/* ==========================================================================
   SECTION: CAR COLLECTION (SELECTED AUTOMOBILES)
   ========================================================================== */
.section-collection {
  padding: var(--section-spacing) 0;
  position: relative;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.collection-header-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 50px;
  gap: 30px;
  flex-wrap: wrap;
}

.collection-filter-bar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.filter-btn {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  padding: 8px 16px;
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
  background-color: var(--bg-card);
  transition: all var(--transition-fast);
  text-transform: uppercase;
}

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

.filter-btn.active {
  color: var(--accent-gold);
  border-color: var(--accent-gold);
  background-color: var(--accent-gold-dim);
}

/* Car Cards Grid */
.cars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  gap: 32px;
}

/* CAR CARD (Strictly Minimalist / Editorial)
   Layout: Hình ảnh xe -> Tên thương hiệu -> Tên xe -> Mô tả ngắn -> Đường kẻ mảnh -> EXPLORE
   Hover: Hình ảnh zoom rất nhẹ, typography thay đổi nhẹ, chuyển động mượt.
   NO BADGES: NO SALE, NO HOT, NO NEW, NO PRICE.
*/
.car-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
  position: relative;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.car-card:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4);
}

.car-card-visual {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background-color: #0c0d10;
  border-bottom: 1px solid var(--border-subtle);
}

.car-card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.88) contrast(1.04);
  transition: transform var(--transition-slow);
}

.car-card:hover .car-card-img {
  transform: scale(1.03);
}

.car-card-body {
  padding: 28px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.car-brand-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--accent-gold);
  margin-bottom: 8px;
}

.car-model-title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  margin-bottom: 12px;
  line-height: 1.3;
  transition: color var(--transition-fast);
}

.car-card:hover .car-model-title {
  color: #fff;
}

.car-short-desc {
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: 24px;
  flex-grow: 1;
  font-weight: 300;
}

.car-card-divider {
  width: 100%;
  height: 1px;
  background-color: var(--border-subtle);
  margin-bottom: 18px;
  transition: background-color var(--transition-fast);
}

.car-card:hover .car-card-divider {
  background-color: var(--border-hover);
}

.car-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.car-explore-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.car-card:hover .car-explore-link {
  color: var(--accent-gold);
}

.car-explore-link svg {
  transition: transform var(--transition-fast);
}

.car-card:hover .car-explore-link svg {
  transform: translateX(4px);
}

.car-category-pill {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* ==========================================================================
   SECTION: AUTOMOTIVE PHILOSOPHY (EDITORIAL MAGAZINE)
   ========================================================================== */
.section-philosophy {
  padding: 160px 0;
  position: relative;
  background-color: var(--bg-primary);
  overflow: hidden;
}

.philosophy-container {
  max-width: 1100px;
  margin: 0 auto;
  text-align: center;
}

.quote-wrapper {
  position: relative;
  margin-bottom: 60px;
}

.quote-mark {
  font-family: var(--font-serif);
  font-size: 8rem;
  line-height: 1;
  color: var(--accent-gold-dim);
  display: block;
  margin-bottom: -40px;
}

.philosophy-quote {
  font-family: var(--font-serif);
  font-size: clamp(1.85rem, 4.2vw, 3.2rem);
  font-weight: 400;
  line-height: 1.35;
  letter-spacing: 0.03em;
  color: #fff;
  max-width: 900px;
  margin: 0 auto 30px;
}

.philosophy-subtext {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-secondary);
  max-width: 740px;
  margin: 0 auto;
  font-weight: 300;
}

.philosophy-pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  margin-top: 80px;
  text-align: left;
  border-top: 1px solid var(--border-subtle);
  padding-top: 50px;
}

.pillar-card {
  padding: 10px;
}

.pillar-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  color: var(--accent-gold);
  margin-bottom: 12px;
}

.pillar-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  margin-bottom: 14px;
}

.pillar-content {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--text-secondary);
  font-weight: 300;
}

/* ==========================================================================
   SECTION: ABOUT TRẦN QUANG MINH (FOUNDER PROFILE)
   ========================================================================== */
.section-founder {
  padding: var(--section-spacing) 0;
  position: relative;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.founder-layout-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 70px;
  align-items: center;
}

.founder-portrait-column {
  position: relative;
}

.founder-portrait-frame {
  position: relative;
  border: 1px solid var(--border-subtle);
  background-color: var(--bg-card);
  padding: 14px;
}

.founder-img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  filter: grayscale(85%) contrast(1.1) brightness(0.9);
  transition: filter var(--transition-normal);
}

.founder-portrait-frame:hover .founder-img {
  filter: grayscale(30%) contrast(1.1) brightness(0.95);
}

.founder-signature-box {
  margin-top: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--accent-gold);
  text-transform: uppercase;
}

.founder-narrative-column {
  display: flex;
  flex-direction: column;
}

.founder-name-title {
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 4.5vw, 3.5rem);
  letter-spacing: 0.1em;
  color: #fff;
  line-height: 1.1;
  margin-bottom: 6px;
}

.founder-role-subtitle {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--accent-gold);
  margin-bottom: 28px;
}

.founder-core-statement {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-style: italic;
  line-height: 1.6;
  color: var(--text-primary);
  margin-bottom: 24px;
  padding-left: 20px;
  border-left: 2px solid var(--accent-gold);
}

.founder-bio-paragraphs p {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: 18px;
  font-weight: 300;
}

.founder-values-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 32px;
  padding-top: 28px;
  border-top: 1px solid var(--border-subtle);
}

.val-item h5 {
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.val-item p {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ==========================================================================
   SECTION: CONTACT (VISIT THE SHOWROOM)
   ========================================================================== */
.section-contact {
  padding: var(--section-spacing) 0;
  position: relative;
  background-color: var(--bg-primary);
}

.contact-layout-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 60px;
}

.contact-info-panel {
  display: flex;
  flex-direction: column;
}

.contact-showroom-name {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  letter-spacing: 0.12em;
  color: #fff;
  margin-bottom: 8px;
}

.contact-founder-line {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  color: var(--accent-gold);
  text-transform: uppercase;
  margin-bottom: 32px;
}

.contact-fields-list {
  display: flex;
  flex-direction: column;
  gap: 28px;
  margin-bottom: 36px;
}

.contact-field-item {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.field-icon {
  width: 40px;
  height: 40px;
  border: 1px solid var(--border-subtle);
  background-color: var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-gold);
  flex-shrink: 0;
}

.field-meta label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.field-meta p {
  font-size: 0.95rem;
  color: var(--text-primary);
  line-height: 1.5;
}

.contact-disclaimer-note {
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--text-muted);
  padding: 16px 20px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
}

/* Appointment Form Panel */
.contact-form-panel {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  padding: 44px;
  border-radius: var(--radius-sm);
}

.form-panel-title {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  letter-spacing: 0.08em;
  color: #fff;
  margin-bottom: 10px;
}

.form-panel-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 30px;
  line-height: 1.6;
}

.appointment-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  padding: 12px 16px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.88rem;
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent-gold);
  box-shadow: 0 0 0 2px var(--accent-gold-dim);
}

.form-select {
  cursor: pointer;
}

.form-textarea {
  min-height: 100px;
  resize: vertical;
}

.form-submit-btn {
  width: 100%;
  margin-top: 10px;
  padding: 16px;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
  background-color: #040507;
  border-top: 1px solid var(--border-subtle);
  padding: 80px 0 40px;
}

.footer-top-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 40px;
  flex-wrap: wrap;
  gap: 30px;
}

.footer-nav {
  display: flex;
  gap: 28px;
  list-style: none;
  flex-wrap: wrap;
}

.footer-nav-link {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.footer-nav-link:hover {
  color: var(--accent-gold);
}

.footer-brand-line-row {
  text-align: center;
  padding: 30px 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 30px;
}

.brand-five-symbols {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  letter-spacing: 0.32em;
  color: var(--accent-silver);
  text-transform: uppercase;
  word-spacing: 0.4em;
}

.footer-bottom-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 16px;
}

.footer-disclaimer-pill {
  font-size: 0.7rem;
  color: var(--accent-gold);
}

/* ==========================================================================
   INTERACTIVE CAR DETAIL MODAL (XEM CHI TIẾT)
   ========================================================================== */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(4, 5, 7, 0.88);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.modal-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-window {
  background-color: var(--bg-card);
  border: 1px solid var(--border-hover);
  width: 100%;
  max-width: 1040px;
  max-height: 90vh;
  overflow-y: auto;
  border-radius: var(--radius-sm);
  position: relative;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.8);
  transform: scale(0.96) translateY(12px);
  transition: transform var(--transition-normal);
}

.modal-backdrop.open .modal-window {
  transform: scale(1) translateY(0);
}

.modal-close-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border-subtle);
  background-color: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  z-index: 10;
  transition: all var(--transition-fast);
}

.modal-close-btn:hover {
  color: #fff;
  border-color: var(--accent-gold);
}

.modal-content-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
}

.modal-visual-pane {
  background-color: #000;
  border-right: 1px solid var(--border-subtle);
  position: relative;
  display: flex;
  align-items: center;
}

.modal-hero-img {
  width: 100%;
  height: 100%;
  min-height: 400px;
  object-fit: cover;
  filter: brightness(0.9);
}

.modal-details-pane {
  padding: 44px;
  display: flex;
  flex-direction: column;
}

.modal-brand-tag {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.24em;
  color: var(--accent-gold);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.modal-car-title {
  font-family: var(--font-serif);
  font-size: 1.85rem;
  letter-spacing: 0.05em;
  color: #fff;
  margin-bottom: 6px;
  line-height: 1.2;
}

.modal-category-name {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.modal-philosophy-quote {
  font-family: var(--font-serif);
  font-size: 0.98rem;
  font-style: italic;
  color: var(--accent-gold-light);
  line-height: 1.6;
  margin-bottom: 20px;
  padding-left: 14px;
  border-left: 2px solid var(--accent-gold);
}

.modal-overview-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 24px;
}

/* Specs Table */
.modal-specs-section {
  margin-bottom: 24px;
  border-top: 1px solid var(--border-subtle);
  padding-top: 20px;
}

.specs-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 12px;
}

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

.specs-table tr {
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.specs-table td {
  padding: 8px 0;
  font-size: 0.85rem;
}

.specs-label {
  color: var(--text-muted);
  width: 38%;
  font-weight: 300;
}

.specs-value {
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-weight: 500;
}

.modal-highlights-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 28px;
  border-top: 1px solid var(--border-subtle);
  padding-top: 18px;
}

.highlight-bullet {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.highlight-bullet::before {
  content: '•';
  color: var(--accent-gold);
  font-size: 1.1rem;
}

.modal-actions {
  margin-top: auto;
  display: flex;
  gap: 16px;
}

/* Toast Notification */
.toast-notification {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background-color: var(--bg-card);
  border: 1px solid var(--accent-gold);
  padding: 16px 24px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 14px;
  z-index: 3000;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.7);
  transform: translateY(100px);
  opacity: 0;
  transition: all var(--transition-normal);
}

.toast-notification.show {
  transform: translateY(0);
  opacity: 1;
}

.toast-icon {
  color: var(--accent-gold);
}

.toast-text h5 {
  font-family: var(--font-sans);
  font-size: 0.88rem;
  color: #fff;
  margin-bottom: 2px;
}

.toast-text p {
  font-size: 0.78rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   RESPONSIVE DESIGN (Desktop, Laptop, Tablet, Mobile)
   ========================================================================== */
@media (max-width: 1080px) {
  :root {
    --section-spacing: 100px;
  }

  .showroom-grid,
  .brand-slide,
  .founder-layout-grid,
  .contact-layout-grid,
  .modal-content-grid {
    grid-template-columns: 1fr;
  }

  .modal-visual-pane {
    border-right: none;
    border-bottom: 1px solid var(--border-subtle);
  }

  .modal-hero-img {
    height: 320px;
    min-height: auto;
  }

  .philosophy-pillars-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .cars-grid {
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  }
}

@media (max-width: 860px) {
  .nav-menu,
  .header-action {
    display: none;
  }

  .mobile-toggle {
    display: flex;
  }

  .hero-editorial-meta {
    grid-template-columns: 1fr;
    gap: 20px;
    text-align: center;
  }

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

  .form-row {
    grid-template-columns: 1fr;
  }

  .founder-values-row {
    grid-template-columns: 1fr;
  }

  .footer-top-row {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 580px) {
  :root {
    --container-padding: 20px;
    --section-spacing: 80px;
  }

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

  .brand-slide {
    padding: 24px;
  }

  .contact-form-panel {
    padding: 24px;
  }

  .modal-details-pane {
    padding: 24px;
  }

  .brand-five-symbols {
    letter-spacing: 0.16em;
    font-size: 0.8rem;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .btn-primary {
    width: 100%;
  }
}