/* ============================================================
   Genmai — Homepage Trust Modules
   Facility showcase · COA carousel · Chat-proof carousel ·
   Trade assurance · FAQ · Lightbox
   Additive only. Relies on design tokens defined in style.css.
   Namespaced under .gt-* to avoid collisions with existing CSS.
   ============================================================ */

/* ---- Shared section rhythm ---- */
.gt-section{
  padding: var(--space-24) 0;
  position: relative;
}
.gt-section--alt{ background: var(--bg-subtle); }

.gt-head{
  max-width: 760px;
  margin: 0 auto var(--space-12);
  text-align: center;
}
.gt-head .section-label{ justify-content: center; }
.gt-head .section-label::before{ display: none; }            /* hide the leading dash when centered */
.gt-head .section-subtitle{ margin: var(--space-4) auto 0; }  /* center the subtitle block under the title */

/* ---- Carousel (shared by COA + chat proof) ---- */
.gt-carousel{ position: relative; }
.gt-carousel-track{
  display: flex;
  gap: var(--space-6);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  padding: 16px 8px 24px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.gt-carousel-track::-webkit-scrollbar{ display: none; }
.gt-carousel-track > *{
  scroll-snap-align: start;
  flex: 0 0 auto;
}

.gt-carousel-controls{
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}
.gt-arrow{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border-radius: var(--radius-full);
  border: 1px solid var(--gray-200);
  background: var(--white);
  color: var(--gray-700);
  cursor: pointer;
  transition: all var(--transition-base);
}
.gt-arrow svg{ width: 20px; height: 20px; }
.gt-arrow:hover{
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}
.gt-arrow:disabled{
  opacity: .35;
  cursor: default;
  border-color: var(--gray-200);
  color: var(--gray-400);
  box-shadow: none;
}

/* ============================================================
   1. Chat-proof carousel (real customer conversation screenshots)
   ============================================================ */
.gt-proof-card{
  width: 300px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 22px;
  padding: 10px 10px 4px;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}
.gt-proof-card:hover{ transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.gt-proof-shot{
  position: relative;
  height: 460px;
  border-radius: 16px;
  overflow: hidden;
  background: var(--gray-100);
}
.gt-proof-shot img{
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  display: block;
}
.gt-proof-cap{
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 6px 10px;
  font: 500 var(--fs-sm)/1.4 var(--font-primary);
  color: var(--text-secondary);
}
.gt-proof-cap::before{
  content: "";
  width: 8px; height: 8px;
  border-radius: var(--radius-full);
  background: var(--primary);
  flex: 0 0 auto;
}

/* ============================================================
   2. COA / test-report carousel (A4 portrait, opens lightbox)
   ============================================================ */
.gt-coa-card{
  width: 280px;
  cursor: zoom-in;
}
.gt-coa-paper{
  position: relative;
  aspect-ratio: 1 / 1.414;            /* A4 portrait */
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-base);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}
.gt-coa-card:hover .gt-coa-paper{
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.gt-coa-paper img{
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  display: block;
}
.gt-coa-zoom{
  position: absolute;
  top: 10px; right: 10px;
  width: 32px; height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  background: rgba(15, 23, 42, .55);
  color: #fff;
  opacity: 0;
  transition: opacity var(--transition-base);
  pointer-events: none;
}
.gt-coa-card:hover .gt-coa-zoom{ opacity: 1; }
.gt-coa-zoom svg{ width: 16px; height: 16px; }
.gt-coa-cap{
  margin-top: 12px;
  text-align: center;
  font: 500 var(--fs-sm)/1.4 var(--font-primary);
  color: var(--text-secondary);
}

/* ============================================================
   3. Facility showcase (workshop · lab · team · equipment)
   ============================================================ */
.gt-facility-grid{
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: var(--space-6);
}
.gt-facility-card{
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: zoom-in;
  box-shadow: var(--shadow-base);
  background: var(--gray-100);
}
.gt-facility-card img{
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .6s var(--transition-slower);
}
.gt-facility-card:hover img{ transform: scale(1.06); }
.gt-facility-overlay{
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10, 13, 18, .72) 0%, rgba(10, 13, 18, .15) 45%, transparent 70%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-5);
}
.gt-facility-tag{
  align-self: flex-start;
  margin-bottom: 8px;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, .92);
  color: var(--primary-dark);
  font: 600 var(--fs-xs)/1 var(--font-primary);
  letter-spacing: .02em;
  text-transform: uppercase;
}
.gt-facility-cap{
  color: #fff;
  font: 600 var(--fs-base)/1.35 var(--font-primary);
  text-shadow: 0 1px 4px rgba(0, 0, 0, .35);
}

/* ============================================================
   4. Trade assurance (guarantee cards)
   ============================================================ */
.gt-assurance-grid{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-6);
}
.gt-assurance-card{
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}
.gt-assurance-card:hover{
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(var(--primary-rgb), .3);
}
.gt-assurance-icon{
  width: 54px; height: 54px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--primary-light);
  color: var(--primary);
  margin-bottom: var(--space-5);
}
.gt-assurance-icon svg{ width: 26px; height: 26px; }
.gt-assurance-card h3{
  margin: 0 0 var(--space-3);
  font: 700 var(--fs-xl)/1.3 var(--font-primary);
  color: var(--text-primary);
}
.gt-assurance-card p{
  margin: 0;
  font: 400 var(--fs-base)/1.6 var(--font-primary);
  color: var(--text-secondary);
}

/* ============================================================
   5. FAQ accordion
   ============================================================ */
.gt-faq-list{
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.gt-faq-item{
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  background: var(--white);
  overflow: hidden;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}
.gt-faq-item.is-open{
  border-color: rgba(var(--primary-rgb), .35);
  box-shadow: var(--shadow-sm);
}
.gt-faq-q{
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-6);
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font: 600 var(--fs-lg)/1.4 var(--font-primary);
  color: var(--text-primary);
}
.gt-faq-icon{
  flex: 0 0 auto;
  width: 26px; height: 26px;
  position: relative;
  transition: transform var(--transition-base);
  color: var(--primary);
}
.gt-faq-icon::before,
.gt-faq-icon::after{
  content: "";
  position: absolute;
  top: 50%; left: 50%;
  background: currentColor;
  border-radius: 2px;
  transform: translate(-50%, -50%);
}
.gt-faq-icon::before{ width: 14px; height: 2px; }
.gt-faq-icon::after{ width: 2px; height: 14px; transition: transform var(--transition-base); }
.gt-faq-item.is-open .gt-faq-icon::after{ transform: translate(-50%, -50%) scaleY(0); }
.gt-faq-a{
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow);
}
.gt-faq-a-inner{
  padding: 0 var(--space-6) var(--space-6);
  font: 400 var(--fs-base)/1.7 var(--font-primary);
  color: var(--text-secondary);
}
.gt-faq-a-inner p{ margin: 0 0 var(--space-3); }
.gt-faq-a-inner p:last-child{ margin-bottom: 0; }

/* ============================================================
   Lightbox (COA + facility) — no download, image only
   ============================================================ */
.gt-lb{
  position: fixed;
  inset: 0;
  z-index: 100000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(8, 11, 16, .9);
  opacity: 0;
  visibility: hidden;
  transition: opacity .3s ease, visibility .3s ease;
  padding: 4vh 5vw;
}
.gt-lb.is-open{ opacity: 1; visibility: visible; }
.gt-lb-stage{
  position: relative;
  max-width: 100%;
  max-height: 92vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  transform: scale(.96);
  transition: transform .3s cubic-bezier(.16, 1, .3, 1);
}
.gt-lb.is-open .gt-lb-stage{ transform: scale(1); }
.gt-lb-img{
  max-width: 100%;
  max-height: 84vh;
  border-radius: var(--radius-md);
  box-shadow: 0 30px 80px rgba(0, 0, 0, .5);
  background: var(--white);
  object-fit: contain;
}
.gt-lb-cap{
  color: rgba(255, 255, 255, .85);
  font: 500 var(--fs-sm)/1.4 var(--font-primary);
  text-align: center;
}
.gt-lb-close{
  position: absolute;
  top: -46px; right: 0;
  width: 40px; height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, .12);
  color: #fff;
  cursor: pointer;
  transition: background var(--transition-base);
}
.gt-lb-close:hover{ background: rgba(255, 255, 255, .25); }
.gt-lb-close svg{ width: 20px; height: 20px; }
.gt-lb-nav{
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  width: 48px; height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, .12);
  color: #fff;
  cursor: pointer;
  transition: background var(--transition-base);
}
.gt-lb-nav:hover{ background: rgba(255, 255, 255, .25); }
.gt-lb-nav svg{ width: 24px; height: 24px; }
.gt-lb-prev{ left: max(16px, 2vw); }
.gt-lb-next{ right: max(16px, 2vw); }
.gt-lb-nav.is-hidden{ display: none; }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 768px){
  .gt-section{ padding: var(--space-16) 0; }
  .gt-head{ margin-bottom: var(--space-10); }
  .gt-proof-card{ width: 250px; }
  .gt-proof-shot{ height: 400px; }
  .gt-coa-card{ width: 220px; }
  .gt-facility-grid{ grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: var(--space-4); }
  .gt-assurance-card{ padding: var(--space-6); }
  .gt-faq-q{ padding: var(--space-5); font-size: var(--fs-base); }
  .gt-lb-nav{ width: 40px; height: 40px; }
}

@media (prefers-reduced-motion: reduce){
  .gt-carousel-track{ scroll-behavior: auto; }
  .gt-facility-card img,
  .gt-proof-card,
  .gt-coa-paper,
  .gt-assurance-card{ transition: none; }
}