/* ===================================================
   CERTIFICATE.CSS — Certification Showcase + Detail Page
   =================================================== */

/* ── 1. OUR CERTIFICATIONS SECTION (About Page) ─────── */
.cert-showcase-section {
  padding: 96px 0;
  background: var(--bg);
  border-top: 1px solid var(--border);
}

.cert-showcase-header {
  text-align: center;
  margin-bottom: 52px;
}

.cert-showcase-header h2 {
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  font-weight: 800;
  color: var(--text-heading);
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.cert-showcase-header p {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 520px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ── Slider wrapper ────────────────────────────────── */
.cert-slider-outer {
  position: relative;
}

.cert-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text-heading);
  font-size: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.2s, box-shadow 0.2s, border-color 0.2s;
  box-shadow: 0 2px 10px hsla(0,0%,0%,0.08);
  line-height: 1;
}

.cert-arrow:hover {
  background: var(--text-heading);
  color: var(--bg);
  border-color: var(--text-heading);
}

.cert-arrow-prev { left: -24px; }
.cert-arrow-next { right: -24px; }

/* ── Scroll track ──────────────────────────────────── */
.cert-slider {
  display: flex;
  gap: 24px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scroll-behavior: smooth;
  padding-bottom: 12px;
  cursor: grab;
  user-select: none;
}

.cert-slider:active { cursor: grabbing; }

/* Hide scrollbar */
.cert-slider::-webkit-scrollbar { display: none; }
.cert-slider { -ms-overflow-style: none; scrollbar-width: none; }

/* ── Certification Card ─────────────────────────────── */
.cert-card {
  flex: 0 0 calc(25% - 18px);
  min-width: 240px;
  scroll-snap-align: start;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  position: relative;
}

.cert-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 48px hsla(0,0%,0%,0.12);
  border-color: var(--text-heading);
}

/* Card image area */
.cert-card-img {
  aspect-ratio: 1 / 1;
  background: var(--bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.cert-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}

.cert-card:hover .cert-card-img img {
  transform: scale(1.04);
}

/* Placeholder icon when no image */
.cert-card-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  width: 100%;
  height: 100%;
  padding: 24px;
}

.cert-card-placeholder svg {
  width: 56px;
  height: 56px;
  stroke: var(--text-muted);
  opacity: 0.5;
}

.cert-card-placeholder span {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  opacity: 0.6;
}

/* Card info */
.cert-card-info {
  padding: 20px 22px 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.cert-card-info h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-heading);
  line-height: 1.3;
  margin: 0;
}

.cert-card-info p {
  font-size: 0.825rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin: 0;
  flex: 1;
}

/* Badge */
.cert-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: 100px;
  padding: 4px 10px;
  width: fit-content;
}

.cert-badge-verified {
  background: hsla(150, 55%, 50%, 0.12);
  color: hsl(150, 45%, 30%);
}

.cert-badge-soon {
  background: hsla(35, 80%, 55%, 0.1);
  color: hsl(30, 65%, 40%);
}

/* Badge dot */
.cert-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

/* ── 2. CERTIFICATE DETAIL PAGE ─────────────────────── */

/* Product header strip (breadcrumb + product name row) */
.cert-product-header {
  padding: 28px 0 0;
  background: var(--bg);
}

.cert-product-title-row {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 24px 0 28px;
}

.cert-product-thumb {
  width: 64px;
  height: 64px;
  object-fit: cover;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-alt);
  flex-shrink: 0;
}

.cert-product-name {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-heading);
  letter-spacing: -0.02em;
  margin: 0 0 4px;
  line-height: 1.2;
}

.cert-product-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0;
}

/* Page hero / tab bar */
.cert-detail-hero {
  padding: 56px 0 0;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

/* Tab navigation */
.cert-tabs {
  display: flex;
  justify-content: center;
  gap: 0;
  border-bottom: 1px solid var(--border);
  padding: 0 20px;
}

.cert-tab-btn {
  position: relative;
  padding: 18px 36px;
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-muted);
  background: none;
  border: none;
  cursor: pointer;
  transition: color 0.2s;
  letter-spacing: -0.01em;
  font-family: inherit;
  line-height: 1;
}

.cert-tab-btn::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--text-heading);
  transform: scaleX(0);
  transition: transform 0.25s ease;
}

.cert-tab-btn.active {
  color: var(--text-heading);
  font-size: 1.4rem;
}

.cert-tab-btn.active::after {
  transform: scaleX(1);
}

/* ── Detail main content ────────────────────────────── */
.cert-detail-main {
  padding: 72px 0 96px;
  background: var(--bg);
}

/* Tab panels */
.cert-panel {
  display: none;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.35s ease, transform 0.35s ease;
}

.cert-panel.active {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  opacity: 1;
  transform: translateY(0);
}

.cert-panel.fade-in {
  animation: certFadeIn 0.35s ease forwards;
}

@keyframes certFadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Certificate image column */
.cert-img-col {
  position: relative;
}

.cert-img-wrap {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 12px 48px hsla(0,0%,0%,0.10);
}

.cert-img-wrap img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: contain;
  max-height: 640px;
}

/* Placeholder for cert image */
.cert-img-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 480px;
  gap: 16px;
  padding: 40px;
  background: var(--bg-alt);
  border: 2px dashed var(--border);
  border-radius: 12px;
}

.cert-img-placeholder svg {
  width: 64px;
  height: 64px;
  stroke: var(--text-muted);
  opacity: 0.35;
}

.cert-img-placeholder p {
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
  line-height: 1.6;
}

/* Info column */
.cert-info-col {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.cert-quote {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-style: italic;
  line-height: 1.65;
  padding-bottom: 0;
}

.cert-info-title {
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 800;
  color: var(--text-heading);
  letter-spacing: -0.025em;
  line-height: 1.1;
  margin: 0;
}

.cert-result-line {
  font-size: 1rem;
  color: var(--text-body);
  font-weight: 400;
  display: flex;
  align-items: center;
  gap: 6px;
}

.cert-result-value {
  font-weight: 700;
  color: var(--text-heading);
}

.cert-info-desc {
  font-size: 0.975rem;
  color: var(--text-body);
  line-height: 1.8;
  max-width: 420px;
}

.cert-meta-row {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
  margin-top: 8px;
}

.cert-meta-item {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  gap: 6px;
}

.cert-meta-item strong {
  color: var(--text-body);
  font-weight: 600;
  min-width: 110px;
  display: inline-block;
}

.cert-view-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-heading);
  text-decoration: underline;
  text-underline-offset: 3px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  font-family: inherit;
  transition: opacity 0.2s;
}

.cert-view-btn:hover { opacity: 0.65; }

/* ── 3. RESPONSIVE ──────────────────────────────────── */
@media (max-width: 1100px) {
  .cert-arrow-prev { left: -12px; }
  .cert-arrow-next { right: -12px; }
}

@media (max-width: 900px) {
  .cert-card {
    flex: 0 0 calc(50% - 12px);
  }

  .cert-panel.active {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .cert-tab-btn {
    padding: 14px 20px;
    font-size: 1.1rem;
  }

  .cert-tab-btn.active { font-size: 1.2rem; }
}

@media (max-width: 600px) {
  .cert-showcase-section { padding: 64px 0; }

  .cert-card {
    flex: 0 0 calc(80vw);
    min-width: 260px;
  }

  .cert-arrow { display: none; }

  .cert-detail-main { padding: 48px 0 64px; }

  .cert-tab-btn {
    padding: 12px 16px;
    font-size: 1rem;
  }

  .cert-tab-btn.active { font-size: 1.1rem; }

  .cert-info-title { font-size: 2rem; }
}