/* ================================================
   ZIABRIDGE — KNOWLEDGE PAGE STYLESHEET
   Scope: used ONLY on Knowledge pages (services/<service>/<topic>.html)
   Purpose: keep Knowledge-page-only styles separate from the main
   style.css so existing pages/design are never touched by this work.
   Reuses the same CSS variables already defined in css/style.css
   (--primary-navy, --secondary-light-blue, --accent-color, etc.)
   ================================================ */

/* ---------- Knowledge intro / split layout (image + text) ---------- */

.kb-split {
  max-width: 1100px;
  margin: 0 auto;
  padding: 50px 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.kb-split.kb-reverse .kb-split-media {
  order: 2;
}

.kb-split-media {
  width: 100%;
}

/* Fixed-aspect-ratio frame so a future real photo (jpg/webp) can replace
   the placeholder file at the same path without changing this layout. */
.kb-image-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  border-radius: 14px;
  overflow: hidden;
  background: var(--secondary-silver);
  box-shadow: 0 10px 30px rgba(15, 44, 102, 0.12);
}

.kb-image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.kb-image-caption {
  margin-top: 10px;
  font-size: 12.5px;
  color: #7a7a7a;
  text-align: center;
}

.kb-split-text h2 {
  font-size: 26px;
  color: var(--primary-navy);
  margin-bottom: 14px;
  font-weight: 700;
}

.kb-split-text p {
  font-size: 15px;
  color: #444;
  line-height: 1.8;
  margin-bottom: 14px;
}

/* ---------- Inspection stage cards (icon-based, no photo needed) ---------- */

.kb-stage-grid {
  max-width: 1200px;
  margin: 0 auto;
  padding: 10px 20px 60px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.kb-stage-card {
  background: #fff;
  border: 1px solid var(--secondary-silver);
  border-radius: 14px;
  padding: 26px 20px;
  text-align: center;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.kb-stage-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 26px rgba(15, 44, 102, 0.12);
}

.kb-stage-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(23, 64, 143, 0.08);
}

.kb-stage-icon svg {
  width: 28px;
  height: 28px;
  stroke: var(--primary-navy);
}

.kb-stage-card h3 {
  font-size: 16px;
  color: var(--primary-navy);
  margin-bottom: 8px;
  font-weight: 700;
}

.kb-stage-card p {
  font-size: 13.5px;
  color: #555;
  line-height: 1.6;
  margin-bottom: 10px;
}

.kb-stage-link {
  font-size: 13px;
  font-weight: 600;
  color: var(--secondary-light-blue);
  text-decoration: none;
}

.kb-stage-link:hover {
  text-decoration: underline;
}

/* ---------- Related knowledge / back-to-service link ---------- */

.kb-back-link-wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px 10px;
}

.kb-back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary-navy);
  text-decoration: none;
}

.kb-back-link:hover {
  text-decoration: underline;
}

/* ---------- Knowledge Hub (question list on the service page) ---------- */

.kb-hub-section {
  max-width: 900px;
  margin: 0 auto;
  padding: 50px 20px 60px;
}

.kb-hub-intro {
  text-align: center;
  margin-bottom: 30px;
}

.kb-hub-intro h2 {
  font-size: 28px;
  color: var(--primary-navy);
  margin-bottom: 10px;
  font-weight: 700;
}

.kb-hub-intro p {
  font-size: 15px;
  color: #555;
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.7;
}

.kb-hub-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 18px auto 0;
  padding: 12px 26px;
  background: var(--primary-navy);
  color: #fff;
  border: none;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s ease;
}

.kb-hub-toggle-btn:hover {
  background: var(--secondary-light-blue);
}

.kb-hub-toggle-btn .kb-hub-toggle-icon {
  font-size: 13px;
  transition: transform 0.2s ease;
  display: inline-block;
}

.kb-hub-toggle-btn[aria-expanded="true"] .kb-hub-toggle-icon {
  transform: rotate(180deg);
}

.kb-hub-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--secondary-silver);
  display: none;
}

.kb-hub-list.kb-hub-open {
  display: block;
  animation: kbHubFadeIn 0.25s ease;
}

@keyframes kbHubFadeIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

.kb-hub-list li {
  border-bottom: 1px solid var(--secondary-silver);
}

.kb-hub-list a,
.kb-hub-list .kb-hub-pending {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 16px 6px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  color: var(--primary-navy);
}

.kb-hub-list .kb-hub-pending {
  color: #9aa3af;
  font-weight: 600;
  cursor: default;
}

.kb-hub-list a:hover {
  color: var(--secondary-light-blue);
}

.kb-hub-arrow {
  flex-shrink: 0;
  font-size: 15px;
}

.kb-hub-soon {
  flex-shrink: 0;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  background: #eef1f5;
  color: #9aa3af;
  padding: 3px 9px;
  border-radius: 20px;
}

/* ---------- Type cards (name -> small image -> short description) ---------- */

.kb-type-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 18px;
  margin: 20px 0;
}

.kb-type-card {
  background: #fff;
  border: 1px solid var(--secondary-silver);
  border-radius: 12px;
  padding: 14px;
  text-align: center;
}

.kb-type-card img {
  width: 100%;
  max-width: 130px;
  height: auto;
  margin: 0 auto 10px;
  display: block;
}

.kb-type-card h4 {
  font-size: 14px;
  color: var(--primary-navy);
  font-weight: 700;
  margin-bottom: 6px;
}

.kb-type-card p {
  font-size: 12.5px;
  color: #666;
  line-height: 1.5;
  margin: 0;
}

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .kb-split {
    grid-template-columns: 1fr;
  }
  .kb-split.kb-reverse .kb-split-media {
    order: 0;
  }
  .kb-stage-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 560px) {
  .kb-stage-grid {
    grid-template-columns: 1fr;
    padding: 10px 16px 40px;
  }
  .kb-split {
    padding: 34px 16px;
    gap: 24px;
  }
}