/* ===== TFWOODING Brand Website ===== 
   Visual System: Warm Minimalism
   Colors: Walnut Brown, Oak Beige, Forest Green
   Typography: Serif Display + Sans Serif Body
*/

:root {
  /* Color Palette */
  --bg-canvas: #F5F0E8;
  --bg-surface: #FFFFFF;
  --bg-surface-alt: #EDE7DC;
  --text-primary: #2C2A28;
  --text-secondary: #5A4F42;
  --text-muted: #8A7F72;
  --border-color: #E0D9CC;
  --accent-walnut: #4A3728;
  --accent-oak: #C8A878;
  --accent-green: #2D4A3E;
  --accent-terracotta: #B8856E;

  /* Typography */
  --font-display: 'Cormorant Garamond', 'Georgia', 'Times New Roman', 'Songti SC', 'SimSun', serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;

  /* Spacing */
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 48px;
  --space-xl: 80px;
  --space-2xl: 120px;
  --space-3xl: 180px;

  /* Easing */
  --ease-smooth: cubic-bezier(0.25, 0.1, 0.25, 1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-secondary);
  background: var(--bg-canvas);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 300;
  color: var(--accent-walnut);
  letter-spacing: -0.01em;
  line-height: 1.15;
}

h1 { font-size: clamp(2.5rem, 5vw, 5rem); font-weight: 300; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.75rem, 3vw, 3rem); font-weight: 300; margin-bottom: var(--space-md); }
h3 { font-size: clamp(1.125rem, 1.5vw, 1.375rem); font-weight: 400; margin-bottom: var(--space-sm); color: var(--accent-walnut); }
h4 { font-size: 1rem; font-weight: 500; margin-bottom: var(--space-xs); font-family: var(--font-body); letter-spacing: 0.02em; }

p { margin-bottom: var(--space-sm); }
a { color: var(--accent-walnut); text-decoration: none; transition: all 0.3s var(--ease-smooth); }
a:hover { color: var(--accent-green); }

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

/* ===== Navigation ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(245, 240, 232, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: all 0.3s var(--ease-smooth);
}
.nav.scrolled {
  border-bottom-color: var(--border-color);
  background: rgba(245, 240, 232, 0.95);
}
.nav-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 20px var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--accent-walnut);
  letter-spacing: 0.05em;
}
.nav-links {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
  align-items: center;
}
.nav-links a {
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: 0.03em;
  position: relative;
  padding: 4px 0;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent-walnut);
  transition: width 0.3s var(--ease-smooth);
}
.nav-links a:hover { color: var(--accent-walnut); }
.nav-links a:hover::after { width: 100%; }
.nav-links a.active { color: var(--accent-walnut); }
.nav-links a.active::after { width: 100%; }

.nav-cta {
  padding: 10px 24px;
  border: 1px solid var(--accent-walnut);
  border-radius: 2px;
  font-size: 0.8125rem;
  letter-spacing: 0.05em;
  color: var(--accent-walnut);
  background: transparent;
  transition: all 0.3s var(--ease-smooth);
}
.nav-cta:hover {
  background: var(--accent-walnut);
  color: var(--bg-canvas);
}

.nav-mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: 0 var(--space-lg);
  background: 
    linear-gradient(180deg, rgba(74,55,40,0.1) 0%, rgba(74,55,40,0.3) 100%),
    url('https://images.unsplash.com/photo-1618221195710-dd6b41faaea6?w=1920&q=80&auto=format') center/cover no-repeat;
}
.hero-inner {
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
  padding-top: 80px;
}
.hero-suptitle {
  font-size: 0.875rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--bg-canvas);
  opacity: 0.9;
  margin-bottom: var(--space-md);
}
.hero h1 {
  color: var(--bg-canvas);
  max-width: 900px;
  margin-bottom: var(--space-md);
  font-weight: 300;
  line-height: 1.05;
}
.hero h1 em {
  font-style: italic;
  font-weight: 300;
}
.hero-subtitle {
  font-size: 1.125rem;
  color: rgba(245, 240, 232, 0.9);
  max-width: 560px;
  margin-bottom: var(--space-lg);
  line-height: 1.7;
}
.hero-buttons {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 36px;
  font-size: 0.875rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 2px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.3s var(--ease-smooth);
  text-decoration: none;
}
.btn-primary {
  background: var(--accent-walnut);
  color: var(--bg-canvas);
  border-color: var(--accent-walnut);
}
.btn-primary:hover {
  background: #3a2a1e;
  border-color: #3a2a1e;
  color: var(--bg-canvas);
}
.btn-secondary {
  background: transparent;
  color: var(--bg-canvas);
  border-color: rgba(245, 240, 232, 0.6);
}
.btn-secondary:hover {
  background: var(--bg-canvas);
  color: var(--accent-walnut);
  border-color: var(--bg-canvas);
}
.btn-outline {
  background: transparent;
  color: var(--accent-walnut);
  border-color: var(--accent-walnut);
}
.btn-outline:hover {
  background: var(--accent-walnut);
  color: var(--bg-canvas);
}

/* ===== Section Common ===== */
.section {
  padding: var(--space-3xl) var(--space-lg);
}
.section-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.section-label {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-oak);
  margin-bottom: var(--space-sm);
}
.section-title {
  max-width: 700px;
  margin-bottom: var(--space-lg);
}
.section-intro {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: var(--space-xl);
}

/* Alternating sections */
.section-alt {
  background: var(--bg-surface);
}
.section-dark {
  background: var(--accent-walnut);
  color: rgba(245, 240, 232, 0.9);
}
.section-dark h2, .section-dark h3 {
  color: var(--bg-canvas);
}
.section-dark .section-label {
  color: var(--accent-oak);
}

/* ===== Craft / Feature Section ===== */
.craft-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}
.craft-item h3 {
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
}
.craft-item p {
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== Signature / Feature ===== */
.signature-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
}
.signature-image {
  aspect-ratio: 4/5;
  background: var(--bg-surface-alt);
  border-radius: 2px;
  overflow: hidden;
  background-image: url('https://images.unsplash.com/photo-1600585154340-be6161a56a0c?w=1200&q=80&auto=format');
  background-size: cover;
  background-position: center;
}
.signature-details {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border-color);
}
.detail-item .detail-value {
  font-family: var(--font-display);
  font-size: 1.75rem;
  color: var(--accent-walnut);
  margin-bottom: 4px;
}
.detail-item .detail-label {
  font-size: 0.8125rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ===== Bespoke / 5 Dimensions ===== */
.dimensions-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}
.dimension-card {
  padding: var(--space-lg) var(--space-md);
  border: 1px solid var(--border-color);
  border-radius: 2px;
  text-align: center;
  transition: all 0.3s var(--ease-smooth);
  background: var(--bg-surface);
}
.dimension-card:hover {
  border-color: var(--accent-oak);
  transform: translateY(-4px);
}
.dimension-number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  color: var(--accent-oak);
  font-weight: 300;
  margin-bottom: var(--space-sm);
}
.dimension-card h4 {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 400;
  color: var(--accent-walnut);
  margin-bottom: var(--space-xs);
}
.dimension-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 0;
}

/* ===== Quote / Pull Quote ===== */
.pull-quote {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}
.pull-quote blockquote {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  font-style: italic;
  font-weight: 300;
  line-height: 1.5;
  color: var(--bg-canvas);
  margin-bottom: var(--space-md);
}
.pull-quote cite {
  font-size: 0.875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-oak);
  font-style: normal;
}

/* ===== Three Factories / Global Network ===== */
.factories-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}
.factory-card {
  padding: var(--space-lg);
  border: 1px solid var(--border-color);
  border-radius: 2px;
  background: var(--bg-surface);
  transition: all 0.3s var(--ease-smooth);
}
.factory-card:hover {
  border-color: var(--accent-oak);
  box-shadow: 0 8px 40px rgba(74, 55, 40, 0.08);
}
.factory-flag {
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
}
.factory-card h3 {
  font-size: 1.25rem;
  margin-bottom: 4px;
}
.factory-tag {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-green);
  margin-bottom: var(--space-sm);
}
.factory-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 0;
}

/* ===== CTA Section ===== */
.cta-section {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}
.cta-section h2 {
  margin-bottom: var(--space-md);
}
.cta-section p {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
}

/* ===== Product Grid ===== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}
.product-card {
  background: var(--bg-surface);
  border-radius: 2px;
  overflow: hidden;
  transition: all 0.4s var(--ease-smooth);
  cursor: pointer;
  border: 1px solid var(--border-color);
}
.product-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 16px 60px rgba(74, 55, 40, 0.12);
}
.product-image {
  aspect-ratio: 4/3;
  background: var(--bg-surface-alt);
  overflow: hidden;
  position: relative;
}
.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease-smooth);
}
.product-card:hover .product-image img {
  transform: scale(1.05);
}
.product-info {
  padding: var(--space-md);
}
.product-series {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-oak);
  margin-bottom: 6px;
}
.product-name {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--accent-walnut);
  margin-bottom: 6px;
  font-weight: 400;
}
.product-spec {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

/* ===== Product Filter ===== */
.filter-bar {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
  align-items: center;
}
.filter-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.filter-tag {
  padding: 6px 16px;
  font-size: 0.8125rem;
  border: 1px solid var(--border-color);
  border-radius: 100px;
  background: var(--bg-surface);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s var(--ease-smooth);
}
.filter-tag:hover {
  border-color: var(--accent-walnut);
  color: var(--accent-walnut);
}
.filter-tag.active {
  background: var(--accent-walnut);
  color: var(--bg-canvas);
  border-color: var(--accent-walnut);
}

/* ===== Customization ===== */
.custom-hero {
  text-align: center;
  padding: var(--space-3xl) var(--space-lg) var(--space-xl);
}
.custom-hero h1 {
  max-width: 800px;
  margin: 0 auto var(--space-md);
}
.custom-hero p {
  max-width: 600px;
  margin: 0 auto;
  font-size: 1.0625rem;
}

.custom-dimensions {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-sm);
  padding: 0 var(--space-lg);
}
.custom-dim-item {
  text-align: center;
  padding: var(--space-md) var(--space-sm);
  border-right: 1px solid var(--border-color);
}
.custom-dim-item:last-child {
  border-right: none;
}
.custom-dim-number {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--accent-walnut);
  margin-bottom: 6px;
}
.custom-dim-item h4 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 400;
  color: var(--accent-walnut);
  margin-bottom: 6px;
}
.custom-dim-item p {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

.custom-detail-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
}
.custom-detail-section:nth-child(even) .custom-detail-text { order: 2; }
.custom-detail-image {
  aspect-ratio: 3/2;
  background: var(--bg-surface-alt);
  border-radius: 2px;
  background-size: cover;
  background-position: center;
}

/* ===== Contact Page ===== */
.contact-hero {
  padding: var(--space-3xl) var(--space-lg) var(--space-xl);
  text-align: center;
}
.contact-hero h1 {
  margin-bottom: var(--space-md);
}
.contact-hero p {
  font-size: 1.125rem;
  max-width: 500px;
  margin: 0 auto;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--space-2xl);
  padding: 0 var(--space-lg) var(--space-2xl);
}
.contact-info h3 {
  font-size: 1.5rem;
  margin-bottom: var(--space-lg);
}
.info-block {
  margin-bottom: var(--space-lg);
}
.info-block h4 {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 6px;
}
.info-block p, .info-block a {
  font-size: 1rem;
  color: var(--accent-walnut);
  margin-bottom: 0;
}

.contact-form {
  background: var(--bg-surface);
  padding: var(--space-xl);
  border-radius: 2px;
  border: 1px solid var(--border-color);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}
.form-group {
  margin-bottom: var(--space-md);
}
.form-group label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
  letter-spacing: 0.03em;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  border-radius: 2px;
  font-size: 0.9375rem;
  font-family: var(--font-body);
  color: var(--text-primary);
  background: var(--bg-canvas);
  transition: all 0.2s var(--ease-smooth);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-walnut);
  background: var(--bg-surface);
}
.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

/* ===== Page Header (for inner pages) ===== */
.page-header {
  padding: calc(var(--space-3xl) + 40px) var(--space-lg) var(--space-xl);
  text-align: center;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
}
.page-header h1 {
  margin-bottom: var(--space-sm);
}
.page-header p {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ===== Footer ===== */
.footer {
  background: var(--accent-walnut);
  color: rgba(245, 240, 232, 0.8);
  padding: var(--space-2xl) var(--space-lg) var(--space-lg);
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}
.footer-brand h3 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--bg-canvas);
  font-weight: 300;
  margin-bottom: var(--space-sm);
  letter-spacing: 0.05em;
}
.footer-brand p {
  font-size: 0.875rem;
  line-height: 1.7;
  max-width: 300px;
}
.footer-col h4 {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--bg-canvas);
  margin-bottom: var(--space-md);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-family: var(--font-body);
}
.footer-col ul {
  list-style: none;
}
.footer-col li {
  margin-bottom: 10px;
}
.footer-col a {
  color: rgba(245, 240, 232, 0.7);
  font-size: 0.875rem;
}
.footer-col a:hover {
  color: var(--bg-canvas);
}
.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding-top: var(--space-md);
  border-top: 1px solid rgba(245, 240, 232, 0.15);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8125rem;
  color: rgba(245, 240, 232, 0.5);
  flex-wrap: wrap;
  gap: var(--space-sm);
}
.footer-bottom a {
  color: rgba(245, 240, 232, 0.5);
}
.footer-bottom a:hover { color: var(--bg-canvas); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .craft-grid { grid-template-columns: 1fr; gap: var(--space-lg); }
  .signature-section { grid-template-columns: 1fr; gap: var(--space-lg); }
  .factories-grid { grid-template-columns: 1fr; }
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .dimensions-grid { grid-template-columns: repeat(2, 1fr); }
  .custom-dimensions { grid-template-columns: repeat(3, 1fr); }
  .custom-detail-section { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .section { padding: var(--space-xl) var(--space-sm); }
  .nav-inner { padding: 16px var(--space-sm); }
  .nav-links { display: none; }
  .nav-mobile-toggle { display: block; }
  .hero { padding: 0 var(--space-sm); }
  .hero h1 { font-size: 2.5rem; }
  .products-grid { grid-template-columns: 1fr; }
  .dimensions-grid { grid-template-columns: 1fr; }
  .custom-dimensions { grid-template-columns: repeat(2, 1fr); }
  .form-row { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: var(--space-lg); }
  .signature-details { grid-template-columns: 1fr; gap: var(--space-md); }
}

/* ===== Animations ===== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s var(--ease-smooth), transform 0.8s var(--ease-smooth);
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}