/* ============================================
   World Trade Wool - Modern Styles
   Responsive, SEO-friendly, accessible
   ============================================ */

:root {
  /* Colors - warm, textile-inspired palette */
  --color-wool: #8b7355;
  --color-wool-dark: #6b5344;
  --color-wool-light: #c4a77d;
  --color-cream: #f5f0e8;
  --color-offwhite: #faf8f5;
  --color-charcoal: #2c2825;
  --color-text: #3d3834;
  --color-text-muted: #6b6560;
  --color-border: #e5dfd6;
  --color-bg-section: #faf8f5;
  --color-white: #fff;
  --font-display: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --container-max: 1200px;
  --container-narrow: 720px;
  --header-height: 72px;
  --radius: 6px;
  --radius-lg: 12px;
  --shadow: 0 4px 20px rgba(44, 40, 37, 0.08);
  --shadow-lg: 0 12px 40px rgba(44, 40, 37, 0.12);
  --transition: 0.2s ease;
}

/* Reset & base */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-offwhite);
}

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

a {
  color: var(--color-wool-dark);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-wool);
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
}

/* Skip link - accessibility */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  z-index: 100;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-wool-dark);
  color: var(--color-white);
  border-radius: var(--radius);
  font-weight: 500;
  transition: top var(--transition);
}

.skip-link:focus {
  top: var(--space-md);
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--space-2xl);
  }
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}

.site-header.scrolled {
  box-shadow: var(--shadow);
}

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

.logo-text {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-charcoal);
  letter-spacing: 0.02em;
}

.logo-img {
  display: block;
  height: 40px;
  width: auto;
  max-height: 44px;
  object-fit: contain;
}

@media (min-width: 768px) {
  .logo-text {
    font-size: 1.5rem;
  }
  .logo-img {
    height: 44px;
  }
}

/* Nav toggle - mobile */
.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  color: var(--color-charcoal);
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (min-width: 768px) {
  .nav-toggle {
    display: none;
  }
}

/* Main nav */
.main-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-lg);
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: transform var(--transition), opacity var(--transition), visibility var(--transition);
}

.main-nav.is-open ul {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.main-nav a {
  display: block;
  padding: var(--space-md);
  color: var(--color-text);
  font-weight: 500;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--color-wool-dark);
}

.lang-switcher {
  margin-left: var(--space-sm);
  padding-left: var(--space-md);
  border-left: 1px solid var(--color-border);
}

.lang-switcher a {
  font-weight: 600;
  font-size: 0.9rem;
}

@media (min-width: 768px) {
  .main-nav ul {
    position: static;
    flex-direction: row;
    background: none;
    border: none;
    padding: 0;
    transform: none;
    opacity: 1;
    visibility: visible;
    gap: var(--space-lg);
  }

  .main-nav a {
    padding: var(--space-sm) 0;
  }
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(var(--header-height) + var(--space-3xl)) var(--space-lg) var(--space-3xl);
  text-align: center;
}

.hero-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

.hero-bg {
  position: absolute;
  inset: 0;
  /* Fallback if video fails to load */
  background: linear-gradient(135deg, var(--color-wool-dark) 0%, var(--color-wool) 50%, var(--color-wool-light) 100%);
  background-size: cover;
  background-position: center;
  z-index: 1;
  pointer-events: none;
}

/* When video is present, hide solid gradient so video shows through */
.hero .hero-video + .hero-bg {
  background: transparent;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(44, 40, 37, 0.5) 0%, rgba(44, 40, 37, 0.7) 100%);
  z-index: 2;
}

.hero-content {
  position: relative;
  z-index: 3;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  color: var(--color-white);
  margin: 0 0 var(--space-lg);
  letter-spacing: 0.02em;
}

.hero-tagline {
  display: block;
  font-size: 0.6em;
  font-weight: 400;
  opacity: 0.95;
  margin-top: 0.2em;
}

.hero-desc {
  max-width: var(--container-narrow);
  margin: 0 auto var(--space-xl);
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.1rem;
}

.btn {
  display: inline-block;
  padding: var(--space-md) var(--space-xl);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 500;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

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

.btn-primary:hover {
  background: var(--color-cream);
  color: var(--color-charcoal);
}

.hero-scroll {
  position: absolute;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.85rem;
  z-index: 3;
}

.hero-scroll svg {
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}

/* Sections */
.section {
  padding: var(--space-4xl) 0;
}

.section-title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  color: var(--color-charcoal);
  margin: 0 0 var(--space-2xl);
  text-align: center;
}

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

.profile-grid {
  display: grid;
  gap: var(--space-2xl);
}

@media (min-width: 992px) {
  .profile-grid {
    grid-template-columns: 1fr 320px;
    align-items: start;
  }
}

.profile-text p {
  margin: 0 0 var(--space-lg);
  color: var(--color-text);
}

.profile-text p:last-child {
  margin-bottom: 0;
}

.profile-stats {
  display: grid;
  gap: var(--space-md);
}

@media (min-width: 992px) {
  .profile-stats {
    position: sticky;
    top: calc(var(--header-height) + var(--space-xl));
  }
}

.stat-card {
  padding: var(--space-xl);
  background: var(--color-bg-section);
  border-radius: var(--radius-lg);
  text-align: center;
  border: 1px solid var(--color-border);
}

.stat-number {
  display: block;
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-wool-dark);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* Features */
.section-features {
  background: var(--color-bg-section);
}

.features-grid {
  display: grid;
  gap: var(--space-xl);
}

@media (min-width: 768px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature-card {
  padding: var(--space-2xl);
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  transition: box-shadow var(--transition), transform var(--transition);
}

.feature-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.feature-icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-lg);
  color: var(--color-wool);
}

.feature-icon svg {
  width: 100%;
  height: 100%;
}

.feature-card h3 {
  font-size: 1.25rem;
  margin: 0 0 var(--space-md);
  color: var(--color-charcoal);
}

.feature-card p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* CTA section */
.section-cta {
  position: relative;
  background-color: var(--color-wool-dark);
  background-image: url('/images/yun01.png');
  background-size: cover;
  background-position: center;
  color: var(--color-white);
}

.section-cta::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(56, 44, 38, 0.3);
  z-index: 1;
  pointer-events: none;
}

.section-cta .container {
  position: relative;
  z-index: 2;
}

.cta-block {
  max-width: var(--container-narrow);
  margin: 0 auto;
  text-align: center;
}

.cta-block h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin: 0 0 var(--space-lg);
  color: inherit;
}

.cta-block p {
  margin: 0 0 var(--space-xl);
  opacity: 0.95;
}

.cta-block .btn-primary {
  background: var(--color-white);
  color: var(--color-wool-dark);
}

.cta-block .btn-primary:hover {
  background: var(--color-cream);
}

/* Footer */
.site-footer {
  padding: var(--space-2xl) 0;
  background: var(--color-charcoal);
  color: rgba(255, 255, 255, 0.8);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  text-align: center;
}

@media (min-width: 768px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.footer-nav {
  display: flex;
  gap: var(--space-lg);
}

.footer-nav a {
  color: rgba(255, 255, 255, 0.8);
}

.footer-nav a:hover {
  color: var(--color-white);
}

.copyright {
  margin: 0;
  font-size: 0.9rem;
}

/* Contact page */
.contact-layout {
  display: grid;
  gap: var(--space-2xl);
}

@media (min-width: 768px) {
  .contact-layout {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}

.contact-info h2 {
  font-size: 1.5rem;
  margin: 0 0 var(--space-lg);
  color: var(--color-charcoal);
}

.contact-info p {
  margin: 0 0 var(--space-md);
  color: var(--color-text);
}

.contact-map-link {
  display: inline-block;
  margin-top: var(--space-sm);
  font-weight: 500;
}

.contact-map-wrap {
  margin-top: var(--space-3xl);
  grid-column: 1 / -1;
}

.contact-map-title {
  font-size: 1.25rem;
  margin: 0 0 var(--space-lg);
  color: var(--color-charcoal);
}

.contact-map {
  position: relative;
  width: 100%;
  height: 0;
  padding-bottom: 56.25%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-border);
}

.contact-map iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.contact-form label {
  font-weight: 500;
  color: var(--color-charcoal);
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: var(--space-md);
  font-family: var(--font-body);
  font-size: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-white);
  transition: border-color var(--transition);
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--color-wool);
  box-shadow: 0 0 0 3px rgba(139, 115, 85, 0.15);
}

.contact-form input[aria-invalid="true"],
.contact-form textarea[aria-invalid="true"] {
  border-color: #c53030;
}

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

.form-message {
  padding: var(--space-md);
  border-radius: var(--radius);
  margin-bottom: var(--space-md);
}

.form-message--success {
  background: #c6f6d5;
  color: #22543d;
  border: 1px solid #9ae6b4;
}

.form-message--error {
  background: #fed7d7;
  color: #742a2a;
  border: 1px solid #feb2b2;
}

/* Page header (inner pages) */
.page-header {
  padding: calc(var(--header-height) + var(--space-4xl)) var(--space-lg) var(--space-3xl);
  background: linear-gradient(135deg, var(--color-wool-dark) 0%, var(--color-wool) 100%);
  color: var(--color-white);
  text-align: center;
}

.page-header-tagline {
  margin: 0 0 var(--space-sm);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  opacity: 0.95;
}

.page-header h1 {
  margin: 0 0 var(--space-lg);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  color: inherit;
}

.page-header-desc {
  margin: 0 0 var(--space-xl);
  max-width: var(--container-narrow);
  margin-left: auto;
  margin-right: auto;
  opacity: 0.95;
  line-height: 1.6;
}

.page-header .btn {
  margin-top: var(--space-md);
}

.page-header--about {
  position: relative;
  background-image: url('/images/yun02.png');
  background-size: cover;
  background-position: center;
}

.page-header--about::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(56, 44, 38, 0.3);
  z-index: 1;
  pointer-events: none;
}

.page-header--about .container {
  position: relative;
  z-index: 2;
}

.page-header--products {
  position: relative;
  background-image: url('/images/yun03.png');
  background-size: cover;
  background-position: center;
}

.page-header--products::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(56, 44, 38, 0.3);
  z-index: 1;
  pointer-events: none;
}

.page-header--products .container {
  position: relative;
  z-index: 2;
}

.page-header--contact {
  background-image: url('/images/contact.png');
  background-size: cover;
  background-position: center;
}

/* Narrow container for long-form text */
.container-narrow {
  max-width: var(--container-narrow);
}

/* Section intro (single line under section title) */
.section-intro {
  text-align: center;
  margin: 0 0 var(--space-2xl);
  color: var(--color-text-muted);
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

/* Subsection title (h3 under h2) */
.subsection-title {
  font-size: 1.35rem;
  color: var(--color-charcoal);
  margin: 0 0 var(--space-lg);
  text-align: center;
}

@media (min-width: 768px) {
  .subsection-title {
    text-align: left;
  }
}

/* Facilities capacity grid (About page) */
.facilities-capacity-grid {
  display: grid;
  gap: var(--space-lg);
  margin-top: var(--space-xl);
  grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 575px) {
  .facilities-capacity-grid {
    grid-template-columns: 1fr;
  }
}

.capacity-card {
  aspect-ratio: 1;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  background-size: cover;
  background-position: center;
  transition: box-shadow var(--transition), transform var(--transition);
}

.capacity-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.capacity-card--1 {
  background-image: url('/images/fab01.png');
}

.capacity-card--2 {
  background-image: url('/images/fab02.png');
}

.capacity-card--3 {
  background-image: url('/images/fab03.png');
}

/* Product detail section */
.section-products-detail {
  background: var(--color-bg-section);
}

.product-blocks {
  display: grid;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

@media (min-width: 768px) {
  .product-blocks {
    grid-template-columns: 1fr;
    gap: var(--space-3xl);
  }
}

.product-block {
  padding: var(--space-2xl);
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.product-block h3 {
  font-size: 1.25rem;
  margin: 0 0 var(--space-md);
  color: var(--color-charcoal);
}

.product-block p {
  margin: 0;
  color: var(--color-text);
  line-height: 1.6;
}

.facilities-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-sm);
}

.facilities-list li {
  position: relative;
  padding-left: 1.5rem;
  color: var(--color-text);
}

.facilities-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-wool);
}

.section-cta-link {
  margin: 0;
}

/* Product page: center text alignment */
.page-products .profile-text,
.page-products .profile-text p,
.page-products .section-intro,
.page-products .subsection-title,
.page-products .feature-card,
.page-products .feature-card h3,
.page-products .feature-card p,
.page-products .product-block,
.page-products .product-block h3,
.page-products .product-block p {
  text-align: center;
}

.page-products .features-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-xl);
}

.page-products .feature-card {
  flex: 0 1 320px;
  max-width: 380px;
}

.page-products .facilities-list {
  max-width: 280px;
  margin-left: auto;
  margin-right: auto;
}

.page-products .facilities-list li {
  text-align: center;
  padding-left: 0;
}

.page-products .facilities-list li::before {
  display: none;
}

/* Utility */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }