/* ============================================================
   Royal Metal — Material Design 3 Redesign
   style.css
   ============================================================ */

/* ── 1. DESIGN TOKENS ─────────────────────────────────────── */
:root {
  /* MD3 Color Scheme — Navy/Gold palette */
  --md-primary:          #1A3A5C;   /* deep navy blue  */
  --md-primary-light:    #2C5282;
  --md-on-primary:       #FFFFFF;
  --md-secondary:        #C9913D;   /* warm gold        */
  --md-secondary-light:  #E5B96A;
  --md-on-secondary:     #1C1400;
  --md-tertiary:         #4A7C8E;
  --md-surface:          #F8F9FC;
  --md-surface-1:        #EFF1F7;
  --md-surface-2:        #E5E8F0;
  --md-on-surface:       #1A1C20;
  --md-on-surface-var:   #434750;
  --md-outline:          #C2C6D0;
  --md-outline-var:      #E2E4EC;
  --md-error:            #BA1A1A;

  /* Elevation shadows (MD3) */
  --elevation-1: 0 1px 2px rgba(0,0,0,.08), 0 1px 3px 1px rgba(0,0,0,.06);
  --elevation-2: 0 1px 2px rgba(0,0,0,.10), 0 2px 6px 2px rgba(0,0,0,.08);
  --elevation-3: 0 4px 8px 3px rgba(0,0,0,.10), 0 1px 3px rgba(0,0,0,.12);
  --elevation-4: 0 6px 10px 4px rgba(0,0,0,.10), 0 2px 3px rgba(0,0,0,.12);

  /* Shape */
  --shape-xs:   4px;
  --shape-sm:   8px;
  --shape-md:   12px;
  --shape-lg:   16px;
  --shape-xl:   28px;
  --shape-full: 9999px;

  /* Typography scale */
  --type-display-lg: clamp(3rem,   6vw, 5rem);
  --type-display-md: clamp(2.25rem,4vw, 3.5rem);
  --type-headline:   clamp(1.5rem, 3vw, 2.25rem);
  --type-title-lg:   clamp(1.25rem,2vw, 1.5rem);
  --type-title-md:   1.125rem;
  --type-body:       1rem;
  --type-label:      0.875rem;
  --type-label-sm:   0.75rem;

  /* Motion */
  --motion-standard:  cubic-bezier(0.2, 0, 0, 1);
  --motion-emphasized: cubic-bezier(0.2, 0, 0, 1);
  --duration-short:   200ms;
  --duration-medium:  400ms;
  --duration-long:    600ms;
}

/* ── 2. RESET & BASE ──────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 72px; /* account for sticky header */
}

body {
  font-family: 'Google Sans', 'Noto Sans KR', sans-serif;
  background: var(--md-surface);
  color: var(--md-on-surface);
  line-height: 1.6;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }

/* ── 3. TYPOGRAPHY HELPERS ────────────────────────────────── */
.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--type-label);
  font-weight: 500;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--md-secondary);
  margin-bottom: 12px;
}
.section-title {
  font-family: 'Google Sans Display', 'Google Sans', sans-serif;
  font-size: var(--type-headline);
  font-weight: 700;
  color: var(--md-primary);
  line-height: 1.2;
  margin-bottom: 16px;
}
.section-sub {
  font-size: var(--type-body);
  color: var(--md-on-surface-var);
  max-width: 56ch;
}
.section-header {
  text-align: center;
  margin-bottom: 64px;
}
.section-header .section-sub { margin-inline: auto; }

/* ── 4. SCROLL PROGRESS ──────────────────────────────────── */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--md-secondary), var(--md-secondary-light));
  width: 0%;
  z-index: 9999;
  transition: width 80ms linear;
}

/* ── 5. TOP APP BAR (Material Top Bar) ────────────────────── */
.top-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(248, 249, 252, 0.88);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid transparent;
  transition:
    border-color var(--duration-medium) var(--motion-standard),
    box-shadow   var(--duration-medium) var(--motion-standard),
    background   var(--duration-medium) var(--motion-standard);
  height: 72px;
}
.top-bar.scrolled {
  border-bottom-color: var(--md-outline-var);
  box-shadow: var(--elevation-2);
}
.top-bar__inner {
  max-width: 1280px;
  margin-inline: auto;
  padding-inline: 16px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 16px;
}
.top-bar__logo {
  flex-shrink: 0;
}
.top-bar__logo img {
  height: 40px;
  width: auto;
  object-fit: contain;
}
.top-bar__nav {
  display: flex;
  gap: 4px;
  margin-left: auto;
}
.nav-link {
  position: relative;
  padding: 8px 10px;
  white-space: nowrap;
  border-radius: var(--shape-full);
  font-size: var(--type-label);
  font-weight: 500;
  letter-spacing: .025em;
  color: var(--md-on-surface-var);
  transition: color var(--duration-short) var(--motion-standard),
              background var(--duration-short) var(--motion-standard);
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--md-secondary);
  transition: transform var(--duration-medium) var(--motion-standard);
}
.nav-link:hover { background: rgba(26,58,92,.06); color: var(--md-primary); }
.nav-link.active { color: var(--md-primary); font-weight: 700; }
.nav-link.active::after { transform: translateX(-50%) scaleX(1); }

.top-bar__lang {
  display: flex;
  gap: 6px;
  margin-left: 16px;
}
.lang-chip {
  padding: 5px 11px;
  border-radius: var(--shape-full);
  font-size: var(--type-label-sm);
  font-weight: 500;
  background: var(--md-surface-1);
  border: 1px solid var(--md-outline-var);
  color: var(--md-on-surface-var);
  transition:
    background var(--duration-short) var(--motion-standard),
    color     var(--duration-short) var(--motion-standard),
    transform var(--duration-short) var(--motion-standard),
    box-shadow var(--duration-short);
  cursor: pointer;
  white-space: nowrap;
  /* button reset */
  font-family: inherit;
  line-height: 1;
  -webkit-appearance: none;
  appearance: none;
}
.lang-chip:hover {
  background: var(--md-surface-2);
  transform: translateY(-1px);
}
/* Active / selected language */
.lang-chip.lang-active {
  background: var(--md-primary);
  color: #fff;
  border-color: var(--md-primary);
  box-shadow: var(--elevation-1);
}

.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  border-radius: var(--shape-full);
  color: var(--md-on-surface);
  transition: background var(--duration-short);
  margin-left: auto;
}
.hamburger:hover { background: var(--md-surface-1); }

/* ── 6. MOBILE DRAWER ─────────────────────────────────────── */
.drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.32);
  z-index: 1100;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-medium) var(--motion-standard);
}
.drawer-overlay.open { opacity: 1; pointer-events: all; }

.drawer {
  position: fixed;
  top: 0;
  right: -320px;
  width: 300px;
  height: 100%;
  background: var(--md-surface);
  z-index: 1200;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-shadow: var(--elevation-4);
  transition: right var(--duration-long) var(--motion-emphasized);
  border-radius: var(--shape-xl) 0 0 var(--shape-xl);
}
.drawer.open { right: 0; }
.drawer__close {
  align-self: flex-end;
  background: var(--md-surface-1);
  border: none;
  border-radius: var(--shape-full);
  padding: 8px;
  cursor: pointer;
  color: var(--md-on-surface);
  margin-bottom: 8px;
  transition: background var(--duration-short);
}
.drawer__close:hover { background: var(--md-surface-2); }
.drawer__link {
  display: block;
  padding: 14px 16px;
  border-radius: var(--shape-md);
  font-size: var(--type-title-md);
  font-weight: 500;
  color: var(--md-on-surface);
  transition: background var(--duration-short);
}
.drawer__link:hover { background: var(--md-surface-1); }

.drawer__link.active {
  background: rgba(26, 58, 92, 0.08);
  color: var(--md-primary);
  font-weight: 700;
}

.drawer__lang {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--md-outline-var);
}

/* ── 7. HERO ──────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100svh;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero__media {
  position: absolute;
  inset: 0;
}
.hero__bg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: brightness(.75) saturate(1.1);
  transform: scale(1.04);
  transition: transform 8s ease-out;
}
.hero.loaded .hero__bg { transform: scale(1); }
.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    160deg,
    rgba(10, 22, 42, 0.72) 0%,
    rgba(26, 58, 92, 0.54) 50%,
    rgba(201, 145, 61, 0.20) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin-inline: auto;
  padding: 140px 24px 80px;
  width: 100%;
}
.hero__eyebrow {
  display: inline-block;
  padding: 6px 16px;
  border-radius: var(--shape-full);
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.24);
  backdrop-filter: blur(8px);
  font-size: var(--type-label);
  font-weight: 500;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: rgba(255,255,255,.9);
  margin-bottom: 24px;
}
.hero__title {
  font-family: 'Google Sans Display', 'Google Sans', sans-serif;
  font-size: var(--type-display-lg);
  font-weight: 700;
  color: #fff;
  line-height: 1.1;
  margin-bottom: 24px;
  max-width: 16ch;
}
.hero__accent {
  color: var(--md-secondary-light);
  display: block;
}
.hero__sub {
  font-size: clamp(1rem, 1.5vw, 1.2rem);
  color: rgba(255,255,255,.82);
  max-width: 52ch;
  margin-bottom: 40px;
  line-height: 1.7;
}
.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* MD3 Buttons */
.btn-filled {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: none;
  cursor: pointer;
  font-family: inherit;
  padding: 14px 28px;
  border-radius: var(--shape-full);
  background: var(--md-secondary);
  color: var(--md-on-secondary);
  font-size: var(--type-label);
  font-weight: 700;
  letter-spacing: .025em;
  transition:
    background var(--duration-short) var(--motion-standard),
    transform   var(--duration-short) var(--motion-standard),
    box-shadow  var(--duration-short) var(--motion-standard);
  box-shadow: var(--elevation-2);
}
.btn-filled:hover {
  background: #B87F32;
  transform: translateY(-2px);
  box-shadow: var(--elevation-3);
}
.btn-filled .material-icons-round { font-size: 20px; }

.btn-tonal {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--shape-full);
  background: rgba(255,255,255,.16);
  border: 1px solid rgba(255,255,255,.32);
  backdrop-filter: blur(8px);
  color: #fff;
  font-size: var(--type-label);
  font-weight: 500;
  transition:
    background var(--duration-short),
    transform   var(--duration-short);
}
.btn-tonal:hover { background: rgba(255,255,255,.24); transform: translateY(-2px); }
.btn-tonal .material-icons-round { font-size: 20px; }

/* ── BULLETPROOF CHEVRON ARROW (Jitter-Free) ───────────────── */
.hero__scroll-cue {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  color: rgba(255,255,255,.7);
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  padding: 12px;
}
.hero__scroll-arrow {
  width: 18px;
  height: 18px;
  border-right: 3px solid rgba(255, 255, 255, 0.7);
  border-bottom: 3px solid rgba(255, 255, 255, 0.7);
  transform: rotate(45deg);
  animation: bounce 2.4s infinite var(--motion-standard);
  will-change: transform;
  backface-visibility: hidden;
}
@keyframes bounce {
  0%, 100% { transform: rotate(45deg) translate(0, 0); opacity: .6; }
  50%       { transform: rotate(45deg) translate(6px, 6px); opacity: 1; }
}

/* ── 8. ABOUT ─────────────────────────────────────────────── */
.about {
  background: var(--md-surface);
  padding: 120px 24px;
}
.about__inner {
  max-width: 1280px;
  margin-inline: auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.about__text h2 { margin-bottom: 20px; }
.about__text p {
  color: var(--md-on-surface-var);
  font-size: var(--type-body);
  line-height: 1.8;
  margin-bottom: 32px;
}
.about__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.info-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--shape-full);
  background: var(--md-surface-1);
  border: 1px solid var(--md-outline-var);
  font-size: var(--type-label);
  font-weight: 500;
  color: var(--md-primary);
}
.info-chip .material-icons-round { font-size: 16px; color: var(--md-secondary); }

.about__korean-desc {
  line-height: 1.8;
  font-size: var(--type-body);
  color: var(--md-on-surface-var);
  margin-bottom: 24px;
}
.about__contact-info {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
  padding: 16px 20px;
  background: var(--md-surface-1);
  border-radius: var(--shape-lg);
  border: 1px solid var(--md-outline-var);
}
.about__contact-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: var(--type-body);
  color: var(--md-primary);
  font-weight: 500;
}
.about__contact-item .material-icons-round {
  color: var(--md-secondary);
  font-size: 20px;
}
.about__contact-item a:hover {
  text-decoration: underline;
  color: var(--md-secondary);
}

.about__gallery {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  position: relative;
  padding-bottom: 30px;
}
.about__gallery-col {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.about__gallery-col:nth-child(even) {
  transform: translateY(30px);
}
.about__img {
  border-radius: var(--shape-lg);
  object-fit: cover;
  width: 100%;
  box-shadow: var(--elevation-2);
  transition: transform var(--duration-medium) var(--motion-standard),
              box-shadow var(--duration-medium) var(--motion-standard);
}
.about__img:hover { transform: scale(1.03); box-shadow: var(--elevation-4); }

.about__gallery-col:nth-child(1) .about__img:nth-child(1) { height: 280px; }
.about__gallery-col:nth-child(1) .about__img:nth-child(2) { height: 180px; }
.about__gallery-col:nth-child(2) .about__img:nth-child(1) { height: 180px; }
.about__gallery-col:nth-child(2) .about__img:nth-child(2) { height: 280px; }

/* ── 9. STATS ─────────────────────────────────────────────── */
.stats-row {
  background: var(--md-primary);
  padding: 72px 24px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0;
  flex-wrap: wrap;
}
.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 24px 64px;
  text-align: center;
}
.stat__num {
  font-family: 'Google Sans Display', sans-serif;
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  color: var(--md-secondary-light);
  line-height: 1;
}
.stat__unit {
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  font-weight: 700;
  color: var(--md-secondary-light);
  margin-left: 2px;
}
.stat__label {
  font-size: var(--type-label);
  font-weight: 500;
  letter-spacing: .04em;
  color: rgba(255,255,255,.72);
  margin-top: 8px;
  text-transform: uppercase;
}
.stat-divider {
  width: 1px;
  height: 60px;
  background: rgba(255,255,255,.16);
}

/* ── 10. PRODUCTS ─────────────────────────────────────────── */
.products {
  background: var(--md-surface-1);
  padding: 120px 24px;
}
.products__inner {
  max-width: 1280px;
  margin-inline: auto;
}
.products__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.product-card {
  background: var(--md-surface);
  border-radius: var(--shape-xl);
  overflow: visible;
  box-shadow: var(--elevation-1);
  border: 1px solid var(--md-outline-var);
  display: flex;
  flex-direction: column;
  transition:
    transform  var(--duration-medium) var(--motion-standard),
    box-shadow var(--duration-medium) var(--motion-standard),
    border-color var(--duration-short);
  cursor: pointer;
}
.product-card:hover, .product-card:focus-visible {
  transform: translateY(-6px);
  box-shadow: var(--elevation-4);
  border-color: var(--md-secondary);
  outline: none;
}

.product-card__media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4/3;
  border-radius: var(--shape-xl) var(--shape-xl) 0 0;
}
.product-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-long) var(--motion-standard);
}
.product-card:hover .product-card__media img { transform: scale(1.06); }

.product-card__overlay {
  position: absolute;
  inset: 0;
  background: rgba(26, 58, 92, 0);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--duration-medium);
  color: #fff;
}
.product-card__overlay .material-icons-round {
  font-size: 40px;
  opacity: 0;
  transform: scale(0.7);
  transition:
    opacity   var(--duration-medium) var(--motion-standard),
    transform var(--duration-medium) var(--motion-standard);
}
.product-card:hover .product-card__overlay { background: rgba(26, 58, 92, 0.44); }
.product-card:hover .product-card__overlay .material-icons-round { opacity: 1; transform: scale(1); }

.product-card__body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}
.product-card__title {
  font-size: var(--type-title-lg);
  font-weight: 700;
  color: var(--md-primary);
}
.product-card__desc {
  font-size: var(--type-label);
  color: var(--md-on-surface-var);
  line-height: 1.7;
  flex: 1;
}
.product-card__btn-view {
  background: none;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: var(--type-label);
  font-weight: 600;
  color: var(--md-secondary);
  margin-top: 8px;
  transition: gap var(--duration-short), color var(--duration-short);
  padding: 4px 0;
  text-align: left;
}
.product-card:hover .product-card__btn-view {
  gap: 8px;
  color: var(--md-primary);
}
.product-card__btn-view .material-icons-round { font-size: 18px; }

/* ── PRODUCTS SHOWCASE DRAWER ──────────────────────────────── */
.showcase-drawer {
  grid-column: 1 / -1;
  background: var(--md-surface);
  border: 1px solid var(--md-outline-var);
  border-radius: var(--shape-xl);
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: 
    max-height 600ms var(--motion-emphasized),
    opacity    400ms ease,
    margin-top 500ms var(--motion-emphasized);
  box-shadow: var(--elevation-2);
  margin-top: 0;
}
.showcase-drawer.open {
  max-height: 2200px;
  opacity: 1;
  margin-top: 40px;
  padding: 32px;
}
.showcase-drawer__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--md-outline-var);
  padding-bottom: 16px;
  margin-bottom: 28px;
}
.showcase-drawer__title {
  font-size: var(--type-title-lg);
  font-weight: 700;
  color: var(--md-primary);
}
.showcase-drawer__subtitle {
  font-size: var(--type-label-sm);
  color: var(--md-secondary);
  text-transform: uppercase;
  letter-spacing: .08em;
  font-weight: 700;
  margin-top: 2px;
}
.showcase-drawer__close {
  background: var(--md-surface-1);
  border: none;
  border-radius: var(--shape-full);
  padding: 8px;
  cursor: pointer;
  color: var(--md-on-surface);
  display: flex;
  align-items: center;
  transition: background var(--duration-short);
}
.showcase-drawer__close:hover { background: var(--md-surface-2); }

.showcase-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.detail-card {
  background: var(--md-surface-1);
  border: 1px solid var(--md-outline-var);
  border-radius: var(--shape-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform var(--duration-short) var(--motion-standard),
              box-shadow var(--duration-short) var(--motion-standard),
              border-color var(--duration-short);
}
.detail-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--elevation-2);
  border-color: var(--md-secondary-light);
}
.detail-card__img-wrapper {
  width: 100%;
  aspect-ratio: 4/3;
  border-radius: var(--shape-md);
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--md-outline-var);
}
.detail-card__img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: transform var(--duration-medium);
}
.detail-card:hover .detail-card__img-wrapper img {
  transform: scale(1.04);
}
.detail-card__badge {
  align-self: flex-start;
  padding: 2px 8px;
  border-radius: var(--shape-xs);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .05em;
  background: var(--md-primary);
  color: var(--md-on-primary);
  text-transform: uppercase;
}
.detail-card__badge.gold {
  background: var(--md-secondary-light);
  color: var(--md-on-secondary);
}
.detail-card__title {
  font-size: var(--type-title-md);
  font-weight: 700;
  color: var(--md-primary);
}
.detail-card__desc {
  font-size: var(--type-label-sm);
  color: var(--md-on-surface-var);
  line-height: 1.5;
  flex-grow: 1;
}
.detail-card__action {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--md-outline-var);
  padding-top: 12px;
  margin-top: 4px;
}
.detail-card__price {
  font-size: var(--type-label);
  font-weight: 700;
  color: var(--md-secondary);
}
.detail-card__btn {
  font-size: 11px;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: var(--shape-full);
  background: var(--md-primary);
  color: #fff;
  transition: background var(--duration-short), transform var(--duration-short);
}
.detail-card__btn:hover { background: var(--md-primary-light); transform: scale(1.02); }

/* ── PER-CARD ACCORDION ────────────────────────────────────── */
.card-accordion {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition:
    max-height 550ms var(--motion-emphasized),
    opacity    350ms ease,
    margin-top 400ms var(--motion-emphasized);
  margin-top: 0;
  border-top: 0px solid var(--md-outline-var);
}
.card-open .card-accordion {
  max-height: 1200px;
  opacity: 1;
  margin-top: 0;
  border-top: 1px solid var(--md-outline-var);
}
.card-accordion__inner {
  padding: 20px;
}
.card-accordion__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 16px;
  gap: 12px;
}
.card-accordion__title {
  font-size: var(--type-title-md);
  font-weight: 700;
  color: var(--md-primary);
}
.card-accordion__sub {
  font-size: var(--type-label-sm);
  color: var(--md-secondary);
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  margin-top: 2px;
}
.card-accordion__close {
  flex-shrink: 0;
  background: var(--md-surface-1);
  border: none;
  border-radius: var(--shape-full);
  padding: 6px;
  cursor: pointer;
  color: var(--md-on-surface);
  display: flex;
  align-items: center;
  transition: background var(--duration-short);
}
.card-accordion__close:hover { background: var(--md-surface-2); }
.card-accordion__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 12px;
}
.showcase-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.showcase-item__img-wrap {
  aspect-ratio: 1 / 1;
  border-radius: var(--shape-md);
  overflow: hidden;
  background: var(--md-surface-1);
  border: 1px solid var(--md-outline-var);
}
.showcase-item__img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-medium) var(--motion-standard);
}
.showcase-item:hover .showcase-item__img-wrap img { transform: scale(1.05); }
.showcase-item__name {
  font-size: var(--type-label-sm);
  font-weight: 500;
  color: var(--md-on-surface-var);
  text-align: center;
  line-height: 1.4;
}

/* open state: card gets a highlight border */
.product-card.card-open {
  border-color: var(--md-secondary);
  box-shadow: var(--elevation-3);
}

/* ── 11. GALLERY STRIP (infinite scroll) ──────────────────── */
.gallery-strip {
  overflow: hidden;
  padding: 0;
  background: var(--md-primary);
}
.gallery-strip__track {
  display: flex;
  gap: 4px;
  animation: marquee 30s linear infinite;
  width: max-content;
}
.gallery-strip__track img {
  width: 340px;
  height: 220px;
  object-fit: cover;
  flex-shrink: 0;
  opacity: .85;
  filter: brightness(.9) saturate(.9);
  transition: opacity var(--duration-medium), filter var(--duration-medium);
}
.gallery-strip__track img:hover { opacity: 1; filter: brightness(1) saturate(1.1); }

@keyframes marquee {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}
.gallery-strip:hover .gallery-strip__track { animation-play-state: paused; }

/* ── 12. CONTACT ──────────────────────────────────────────── */
.contact {
  background: var(--md-surface);
  padding: 120px 24px;
}
.contact__inner {
  max-width: 1280px;
  margin-inline: auto;
}
.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  align-items: stretch;   /* both columns share the same height */
}
.contact__cards {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.contact-card {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  background: var(--md-surface-1);
  border: 1px solid var(--md-outline-var);
  border-radius: var(--shape-xl);
  padding: 24px;
  flex: 1;              /* cards share space evenly inside the column */
  transition: box-shadow var(--duration-medium), transform var(--duration-medium);
}
.contact-card:hover { box-shadow: var(--elevation-2); transform: translateY(-2px); }
.contact-card__icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: var(--md-primary);
  border-radius: var(--shape-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--md-on-primary);
}
.contact-card__icon .material-icons-round { font-size: 24px; }
.contact-card__title {
  font-size: var(--type-title-md);
  font-weight: 700;
  color: var(--md-primary);
  margin-bottom: 6px;
}
.contact-card p {
  font-size: var(--type-label);
  color: var(--md-on-surface-var);
  line-height: 1.8;
}
.contact-card a {
  color: var(--md-secondary);
  font-weight: 500;
  transition: color var(--duration-short);
}
.contact-card a:hover { color: var(--md-primary); text-decoration: underline; }
.factory-img {
  margin-top: 12px;
  border-radius: var(--shape-md);
  max-width: 200px;
  box-shadow: var(--elevation-1);
}

.contact__map {
  border-radius: var(--shape-xl);
  overflow: hidden;
  box-shadow: var(--elevation-3);
  border: 1px solid var(--md-outline-var);
  position: sticky;
  top: 88px;
  background: var(--md-surface-2);
  /* stretch map to match cards column height */
  display: flex;
  flex-direction: column;
  min-height: 420px;
}
.contact__map iframe {
  display: block;
  width: 100%;
  flex: 1;        /* fills remaining height so top & bottom edges align */
  min-height: 420px;
  border: 0;
}

/* ── 13. FOOTER ───────────────────────────────────────────── */
.footer {
  background: var(--md-primary);
  color: rgba(255,255,255,.9);
  padding-top: 64px;
}
.footer__inner {
  max-width: 1280px;
  margin-inline: auto;
  padding-inline: 24px;
  padding-bottom: 48px;
  display: grid;
  grid-template-columns: 1.3fr 0.8fr 1.1fr 0.8fr;
  gap: 40px;
  border-bottom: 1px solid rgba(255,255,255,.12);
}
.footer__meta {
  font-size: var(--type-label);
  color: rgba(255,255,255,.72);
  line-height: 1.6;
}
.footer__logo {
  height: 44px;
  width: auto;
  object-fit: contain;
  margin-bottom: 12px;
  filter: brightness(0) invert(1) opacity(.9);
}
.footer__tagline {
  font-size: var(--type-label);
  color: rgba(255,255,255,.6);
  letter-spacing: .06em;
}
.footer__links, .footer__social {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.footer__links h4, .footer__social h4 {
  font-size: var(--type-label);
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--md-secondary-light);
  margin-bottom: 4px;
}
.footer__links a {
  font-size: var(--type-label);
  color: rgba(255,255,255,.72);
  transition: color var(--duration-short);
}
.footer__links a:hover { color: #fff; }
.footer__social-row { display: flex; gap: 12px; align-items: center; }
.social-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--shape-md);
  background: rgba(255,255,255,.12);
  transition: background var(--duration-short), transform var(--duration-short);
}
.social-btn:hover { background: rgba(255,255,255,.22); transform: translateY(-2px); }
.social-btn img { width: 24px; height: 24px; object-fit: contain; }

.footer__bottom {
  max-width: 1280px;
  margin-inline: auto;
  padding: 20px 24px;
  text-align: center;
  font-size: var(--type-label-sm);
  color: rgba(255,255,255,.42);
}

/* ── 14. FAB (Back to Top) ────────────────────────────────── */
.fab-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 56px;
  height: 56px;
  border-radius: var(--shape-lg);
  background: var(--md-primary);
  color: var(--md-on-primary);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--elevation-3);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.9);
  transition:
    opacity    var(--duration-medium) var(--motion-standard),
    visibility var(--duration-medium) var(--motion-standard),
    transform  var(--duration-medium) var(--motion-standard),
    background var(--duration-short),
    box-shadow var(--duration-short);
  z-index: 1005;
}
.fab-top.visible { opacity: 1; visibility: visible; transform: translateY(0) scale(1); }
.fab-top:hover { background: var(--md-primary-light); box-shadow: var(--elevation-4); }
.fab-top .material-icons-round { font-size: 28px; }

/* ── 15. HERO LOAD ANIMATION ──────────────────────────────── */
.hero-animate {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity   var(--duration-long) var(--motion-standard),
    transform var(--duration-long) var(--motion-standard);
}
body.loaded .hero-animate {
  opacity: 1;
  transform: translateY(0);
}

/* ── 16. REVEAL ANIMATIONS (scroll-triggered) ─────────────── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity   var(--duration-long) var(--motion-standard),
    transform var(--duration-long) var(--motion-standard);
}
.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}
/* stagger for product grid */
.products__grid .product-card:nth-child(2) { transition-delay: 60ms; }
.products__grid .product-card:nth-child(3) { transition-delay: 120ms; }
.products__grid .product-card:nth-child(4) { transition-delay: 180ms; }
.products__grid .product-card:nth-child(5) { transition-delay: 240ms; }
.products__grid .product-card:nth-child(6) { transition-delay: 300ms; }

/* ── CRAFT ────────────────────────────────────────────────── */
.craft {
  background: #fff;
  padding: 120px 24px;
}
.craft__inner { max-width: 1280px; margin-inline: auto; }
.craft__steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.craft-step {
  background: var(--md-surface-1);
  border: 1px solid var(--md-outline-var);
  border-radius: var(--shape-xl);
  padding: 28px 22px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.craft-step__num {
  font-family: 'Google Sans Display', sans-serif;
  font-size: 2rem;
  font-weight: 700;
  color: var(--md-secondary);
  line-height: 1;
}
.craft-step .material-icons-round { color: var(--md-primary); font-size: 28px; }
.craft-step h3 {
  font-size: var(--type-title-md);
  color: var(--md-primary);
}
.craft-step p {
  font-size: var(--type-label);
  color: var(--md-on-surface-var);
  line-height: 1.65;
}

/* ── FEATURED + FILTERS ──────────────────────────────────── */
.featured {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 28px;
}
.featured-card {
  display: grid;
  grid-template-columns: 108px 1fr;
  gap: 14px;
  align-items: center;
  width: 100%;
  text-align: left;
  font: inherit;
  color: inherit;
  background: #fff;
  border: 1px solid var(--md-outline-var);
  border-radius: var(--shape-lg);
  padding: 14px;
  cursor: pointer;
  box-shadow: var(--elevation-1);
  transition: transform var(--duration-short) var(--motion-standard),
              box-shadow var(--duration-short),
              border-color var(--duration-short);
}
.featured-card:hover,
.featured-card:focus-visible {
  transform: translateY(-3px);
  box-shadow: var(--elevation-3);
  border-color: var(--md-secondary-light);
  outline: none;
}
.featured-card img {
  width: 108px;
  height: 108px;
  object-fit: cover;
  object-position: center 28%;
  border-radius: var(--shape-md);
  background: var(--md-surface-1);
}
.featured-card__copy {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}
.featured-card__tag {
  align-self: flex-start;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--md-on-secondary);
  background: var(--md-secondary-light);
  border-radius: var(--shape-xs);
  padding: 2px 8px;
}
.featured-card strong {
  font-size: var(--type-title-md);
  color: var(--md-primary);
}
.featured-card__copy > span:nth-child(3) {
  font-size: var(--type-label-sm);
  color: var(--md-on-surface-var);
  line-height: 1.5;
}
.featured-card__cta {
  font-size: var(--type-label-sm);
  font-weight: 700;
  color: var(--md-secondary);
}

.filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  position: sticky;
  top: 84px;
  z-index: 20;
  margin-bottom: 28px;
  padding: 10px;
  border-radius: var(--shape-full);
  background: rgba(239, 241, 247, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.filter-chip {
  font-family: inherit;
  font-size: var(--type-label);
  font-weight: 600;
  padding: 8px 16px;
  border-radius: var(--shape-full);
  border: 1px solid var(--md-outline);
  background: #fff;
  color: var(--md-on-surface-var);
  cursor: pointer;
  transition: background var(--duration-short), color var(--duration-short), border-color var(--duration-short);
}
.filter-chip:hover { border-color: var(--md-primary); color: var(--md-primary); }
.filter-chip.is-active {
  background: var(--md-primary);
  border-color: var(--md-primary);
  color: #fff;
}
.product-card[hidden] { display: none !important; }

/* ── OEM ──────────────────────────────────────────────────── */
.oem {
  background: var(--md-primary);
  color: #fff;
  padding: 100px 24px;
}
.oem__inner {
  max-width: 1280px;
  margin-inline: auto;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 56px;
  align-items: center;
}
.oem .section-title { color: #fff; }
.oem .section-sub { color: rgba(255,255,255,.78); margin-bottom: 28px; }
.oem__points {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.oem__point {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.14);
  border-radius: var(--shape-lg);
  padding: 20px 22px;
}
.oem__point h3 {
  color: var(--md-secondary-light);
  font-size: var(--type-title-md);
  margin-bottom: 6px;
}
.oem__point p {
  color: rgba(255,255,255,.78);
  font-size: var(--type-label);
  line-height: 1.6;
}

/* ── INQUIRY ──────────────────────────────────────────────── */
.inquiry {
  margin-top: 56px;
  background: #fff;
  border: 1px solid var(--md-outline-var);
  border-radius: var(--shape-xl);
  padding: 40px 36px 32px;
  box-shadow: var(--elevation-1);
}
.inquiry .section-header { margin-bottom: 28px; }
.inquiry__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: var(--type-label);
  font-weight: 600;
  color: var(--md-primary);
}
.field--wide { grid-column: 1 / -1; }
.field input,
.field select,
.field textarea {
  font: inherit;
  font-weight: 400;
  color: var(--md-on-surface);
  background: var(--md-surface);
  border: 1px solid var(--md-outline);
  border-radius: var(--shape-md);
  padding: 12px 14px;
}
.field textarea { resize: vertical; min-height: 120px; }
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: 2px solid var(--md-secondary);
  border-color: transparent;
}
.inquiry__actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 20px;
}
.inquiry__hint {
  font-size: var(--type-label);
  color: var(--md-on-surface-var);
  max-width: 42ch;
}
.inquiry__status {
  margin-top: 14px;
  font-weight: 600;
  color: var(--md-primary);
}
.inquiry__status.is-error { color: var(--md-error); }

/* ── 17. RESPONSIVE ───────────────────────────────────────── */
@media (max-width: 1200px) {
  .top-bar__nav, .top-bar__lang { display: none; }
  .hamburger { display: flex; margin-left: auto; }
}

@media (max-width: 1024px) {
  .products__grid { grid-template-columns: repeat(2, 1fr); }
  .about__inner { grid-template-columns: 1fr; gap: 48px; }
  .about__gallery { grid-template-columns: 1fr 1fr; gap: 16px; }
  .about__gallery-col:nth-child(even) { transform: translateY(20px); }
  .about__gallery-col:nth-child(1) .about__img:nth-child(1) { height: 220px; }
  .about__gallery-col:nth-child(1) .about__img:nth-child(2) { height: 140px; }
  .about__gallery-col:nth-child(2) .about__img:nth-child(1) { height: 140px; }
  .about__gallery-col:nth-child(2) .about__img:nth-child(2) { height: 220px; }
  .contact__grid { grid-template-columns: 1fr; }
  .contact__map { position: static; min-height: unset; }
  .contact__map iframe { height: 320px; }
  .footer__inner { grid-template-columns: 1fr 1fr; }
  .craft__steps { grid-template-columns: 1fr 1fr; }
  .featured { grid-template-columns: 1fr; }
  .oem__inner { grid-template-columns: 1fr; }
  .showcase-drawer.open { padding: 24px; }
}

@media (max-width: 768px) {
  /* Header */
  .top-bar { height: 60px; }
  .top-bar__inner { padding-inline: 16px; gap: 8px; }
  .top-bar__logo img { height: 32px; }
  .top-bar__nav, .top-bar__lang { display: none; }
  .hamburger { display: flex; margin-left: auto; }

  /* Scroll offset for 60px header */
  html { scroll-padding-top: 60px; }

  /* Hero */
  .hero__content { padding: 100px 20px 60px; }
  .hero__title { font-size: clamp(2rem, 8vw, 2.8rem); }

  /* About */
  .about { padding: 72px 20px; }
  .about__inner { gap: 36px; }
  .about__gallery { grid-template-columns: 1fr 1fr; gap: 12px; padding-bottom: 20px; }
  .about__gallery-col { gap: 12px; }
  .about__gallery-col:nth-child(even) { transform: translateY(20px); }
  .about__gallery-col:nth-child(1) .about__img:nth-child(1) { height: 150px; }
  .about__gallery-col:nth-child(1) .about__img:nth-child(2) { height: 100px; }
  .about__gallery-col:nth-child(2) .about__img:nth-child(1) { height: 100px; }
  .about__gallery-col:nth-child(2) .about__img:nth-child(2) { height: 150px; }

  /* Stats */
  .stats-row { flex-direction: column; gap: 32px; padding: 56px 24px; }
  .stat { padding: 0; }
  .stat-divider { display: none; }

  /* Products */
  .products { padding: 72px 20px; }
  .products__grid { grid-template-columns: 1fr; }
  .showcase-drawer.open { padding: 16px; margin-top: 24px; }
  .showcase-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 16px; }

  /* Gallery strip */
  .gallery-strip__track img { width: 220px; height: 150px; }

  /* Contact */
  .contact { padding: 72px 20px; }
  .craft { padding: 72px 20px; }
  .craft__steps { grid-template-columns: 1fr; }
  .oem { padding: 72px 20px; }
  .inquiry { padding: 24px 16px; }
  .inquiry__grid { grid-template-columns: 1fr; }
  .filters { top: 72px; border-radius: 16px; }
  .contact__grid { grid-template-columns: 1fr; gap: 32px; }
  .contact__map { position: static; border-radius: var(--shape-lg); }
  .contact__map iframe { height: 280px; }

  /* Footer */
  .footer__inner { grid-template-columns: 1fr; gap: 32px; padding-inline: 20px; }

  /* FAB */
  .fab-top { bottom: 20px; right: 16px; width: 48px; height: 48px; border-radius: var(--shape-md); }
}

@media (max-width: 480px) {
  /* Header */
  .top-bar__logo img { height: 28px; }

  /* Hero */
  .hero__title { font-size: 2rem; }
  .hero__sub { font-size: 0.9rem; }
  .hero__actions { flex-direction: column; gap: 12px; }
  .btn-filled, .btn-tonal { justify-content: center; width: 100%; }

  /* About gallery stagger disabled on very small screens for cleanliness */
  .about__gallery-col:nth-child(even) { transform: none; }
  .about__gallery { padding-bottom: 0; }
  .about__gallery-col:nth-child(1) .about__img:nth-child(1) { height: 120px; }
  .about__gallery-col:nth-child(1) .about__img:nth-child(2) { height: 90px; }
  .about__gallery-col:nth-child(2) .about__img:nth-child(1) { height: 90px; }
  .about__gallery-col:nth-child(2) .about__img:nth-child(2) { height: 120px; }

  /* Contact map */
  .contact__map iframe { height: 240px; }

  /* Product cards */
  .product-card__media { aspect-ratio: 16/9; }

  /* Showcase grid single column */
  .showcase-grid { grid-template-columns: 1fr 1fr; }
}

/* ── 18. REDUCED MOTION ───────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
  .gallery-strip__track { animation: none; }
}