/* ==========================================================================
   Clinic Tour Section — sections/about/04-clinic-tour/style.css
   Scope   : .dc-about-tour-section, .dc-tour-*, .dc-facility-*, #dc-facility-modal
   Theme   : Navy (#071322) / Gold (#C9A84C)
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Scoped custom properties & box-sizing
   -------------------------------------------------------------------------- */

.dc-about-tour-section,
#dc-facility-modal {
  --dc-navy: #071322;
  --dc-navy-soft: rgba(7, 19, 34, 0.85);
  --dc-gold: #C9A84C;
  --dc-gold-dark: #A8873A;
  --dc-bg: #F8FAFC;
  --dc-white: #FFFFFF;
  --dc-muted: #5B6779;
  --dc-border: rgba(7, 19, 34, 0.15);
  --dc-radius: 12px;
  --dc-shadow: 0 10px 30px rgba(7, 19, 34, 0.08);
  --dc-shadow-lg: 0 18px 45px rgba(7, 19, 34, 0.16);
  --dc-ease: cubic-bezier(0.4, 0, 0.2, 1);
}

.dc-about-tour-section,
.dc-about-tour-section *,
.dc-about-tour-section *::before,
.dc-about-tour-section *::after,
#dc-facility-modal,
#dc-facility-modal *,
#dc-facility-modal *::before,
#dc-facility-modal *::after {
  box-sizing: border-box;
}

/* --------------------------------------------------------------------------
   2. Section base
   -------------------------------------------------------------------------- */

.dc-about-tour-section {
  position: relative;
  padding: 80px 0;
  background: var(--dc-bg);
  color: var(--dc-navy);
  font-family: inherit;
  overflow: hidden;
}

.dc-tour-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --------------------------------------------------------------------------
   3. Section header (eyebrow / title / subtitle)
   -------------------------------------------------------------------------- */

.dc-tour-header {
  max-width: 680px;
  margin: 0 auto 48px;
  text-align: center;
}

.dc-tour-eyebrow {
  display: inline-block;
  margin-bottom: 12px;
  color: var(--dc-gold);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2.4px;
  text-transform: uppercase;
}

.dc-tour-heading {
  margin: 0 0 14px;
  color: var(--dc-navy);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  line-height: 1.2;
}

.dc-tour-subtitle {
  margin: 0;
  color: var(--dc-muted);
  font-size: 16px;
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   4. Filter bar — pill buttons, gold / navy theme
   -------------------------------------------------------------------------- */

.dc-tour-filters {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 42px;
}

.dc-tour-filter-btn {
  appearance: none;
  -webkit-appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 26px;
  border: 1.5px solid var(--dc-border);
  border-radius: 999px;
  background: var(--dc-white);
  color: var(--dc-navy);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.3px;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  transition:
    background-color 0.3s var(--dc-ease),
    color 0.3s var(--dc-ease),
    border-color 0.3s var(--dc-ease),
    box-shadow 0.3s var(--dc-ease),
    transform 0.3s var(--dc-ease);
}

.dc-tour-filter-btn:hover {
  border-color: var(--dc-gold);
  color: var(--dc-gold);
  transform: translateY(-2px);
}

.dc-tour-filter-btn.is-active,
.dc-tour-filter-btn.active {
  background: var(--dc-navy);
  border-color: var(--dc-navy);
  color: var(--dc-gold);
  box-shadow: 0 6px 18px rgba(7, 19, 34, 0.28);
}

.dc-tour-filter-btn.is-active:hover,
.dc-tour-filter-btn.active:hover {
  background: var(--dc-navy);
  color: var(--dc-gold);
  transform: translateY(-2px);
  border-color: var(--dc-navy);
}

/* --------------------------------------------------------------------------
   5. Gallery grid
   -------------------------------------------------------------------------- */

.dc-tour-gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

/* --------------------------------------------------------------------------
   6. Facility card — 4:3, rounded, shadow, image zoom on hover
   -------------------------------------------------------------------------- */

.dc-facility-card {
  position: relative;
  display: grid;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: var(--dc-radius);
  background: var(--dc-white);
  box-shadow: var(--dc-shadow);
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  transition: transform 0.35s var(--dc-ease), box-shadow 0.35s var(--dc-ease);
}

/* Stack image + overlay in the same grid cell */
.dc-facility-card > * {
  grid-area: 1 / 1;
}

.dc-facility-card:hover,
.dc-facility-card:focus-visible {
  transform: translateY(-6px);
  box-shadow: var(--dc-shadow-lg);
}

.dc-facility-card img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.7s var(--dc-ease);
}

.dc-facility-card:hover img,
.dc-facility-card:focus-visible img {
  transform: scale(1.08);
}

/* --------------------------------------------------------------------------
   7. Card overlay — transparent → rgba(7, 19, 34, 0.85), tag + title
   -------------------------------------------------------------------------- */

.dc-facility-overlay {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: flex-start;
  padding: 24px 20px 18px;
  background: linear-gradient(
    to top,
    rgba(7, 19, 34, 0.85) 0%,
    rgba(7, 19, 34, 0.55) 45%,
    transparent 100%
  );
  transition: background 0.4s var(--dc-ease);
}

.dc-facility-card:hover .dc-facility-overlay {
  background: linear-gradient(
    to top,
    rgba(7, 19, 34, 0.92) 0%,
    rgba(7, 19, 34, 0.65) 50%,
    rgba(7, 19, 34, 0.15) 100%
  );
}

.dc-facility-tag {
  display: inline-block;
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--dc-gold);
  color: var(--dc-navy);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  line-height: 1.2;
}

.dc-facility-title {
  margin: 10px 0 0;
  color: var(--dc-white);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.35;
}

/* --------------------------------------------------------------------------
   8. Lightbox modal — fixed, centered, smooth fade in
   -------------------------------------------------------------------------- */

#dc-facility-modal {
  position: fixed;
  inset: 0;
  z-index: 99999;
  display: flex;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 24px;
  background: rgba(0, 0, 0, 0.9);
  opacity: 0;
  visibility: hidden;
  transition:
    opacity 0.35s var(--dc-ease),
    visibility 0s linear 0.35s;
}

#dc-facility-modal.dc-modal--open {
  opacity: 1;
  visibility: visible;
  transition:
    opacity 0.35s var(--dc-ease),
    visibility 0s;
}

/* Centers content when it fits, keeps top reachable when it overflows */
.dc-modal-content {
  width: 100%;
  max-width: 960px;
  margin: auto;
  transform: scale(0.95);
  transition: transform 0.35s var(--dc-ease);
}

#dc-facility-modal.dc-modal--open .dc-modal-content {
  transform: scale(1);
}

.dc-modal-figure {
  margin: 0;
}

.dc-modal-figure img {
  display: block;
  width: 100%;
  max-height: 78vh;
  object-fit: contain;
  border-radius: 10px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.dc-modal-figure figcaption {
  margin-top: 18px;
  text-align: center;
}

.dc-modal-tag {
  display: inline-block;
  padding: 5px 12px;
  border: 1px solid rgba(201, 168, 76, 0.6);
  border-radius: 999px;
  background: rgba(201, 168, 76, 0.12);
  color: var(--dc-gold);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.4px;
  text-transform: uppercase;
}

.dc-modal-title {
  margin: 10px 0 0;
  color: var(--dc-white);
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 600;
}

/* ---- Close button (positioned against viewport, accessible) ---- */

.dc-modal-close {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 100000;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  color: var(--dc-white);
  font-size: 26px;
  font-weight: 300;
  line-height: 1;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  transition:
    background-color 0.3s var(--dc-ease),
    border-color 0.3s var(--dc-ease),
    transform 0.3s var(--dc-ease);
}

.dc-modal-close:hover {
  background: rgba(201, 168, 76, 0.25);
  border-color: var(--dc-gold);
  transform: rotate(90deg);
}

/* ---- Prev / Next navigation buttons ---- */

.dc-modal-nav {
  position: fixed;
  top: 50%;
  z-index: 100000;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  color: var(--dc-white);
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  transition:
    background-color 0.3s var(--dc-ease),
    border-color 0.3s var(--dc-ease),
    transform 0.3s var(--dc-ease);
}

.dc-modal-prev {
  left: 24px;
  transform: translateY(-50%);
}

.dc-modal-next {
  right: 24px;
  transform: translateY(-50%);
}

.dc-modal-nav:hover {
  background: var(--dc-gold);
  border-color: var(--dc-gold);
  color: var(--dc-navy);
}

.dc-modal-nav.dc-modal-prev:hover,
.dc-modal-nav.dc-modal-next:hover {
  transform: translateY(-50%) scale(1.08);
}

/* ---- Body scroll lock (toggled by JS) ---- */

body.dc-lock-scroll {
  overflow: hidden;
}

/* --------------------------------------------------------------------------
   9. Accessibility — visible gold focus ring for keyboard users
   -------------------------------------------------------------------------- */

.dc-tour-filter-btn:focus-visible,
.dc-facility-card:focus-visible,
.dc-modal-close:focus-visible,
.dc-modal-nav:focus-visible {
  outline: 3px solid rgba(201, 168, 76, 0.85);
  outline-offset: 3px;
}

/* --------------------------------------------------------------------------
   10. Responsive — Tablet
   -------------------------------------------------------------------------- */

@media (max-width: 1024px) {
  .dc-about-tour-section {
    padding: 60px 0;
  }

  .dc-tour-gallery-grid {
    gap: 18px;
  }

  .dc-modal-prev {
    left: 16px;
  }

  .dc-modal-next {
    right: 16px;
  }

  .dc-modal-nav {
    width: 44px;
    height: 44px;
    font-size: 22px;
  }
}

/* --------------------------------------------------------------------------
   11. Responsive — Mobile
   -------------------------------------------------------------------------- */

@media (max-width: 640px) {
  .dc-about-tour-section {
    padding: 44px 0;
  }

  .dc-tour-container {
    padding: 0 16px;
  }

  .dc-tour-header {
    margin-bottom: 32px;
  }

  .dc-tour-subtitle {
    font-size: 15px;
  }

  .dc-tour-filters {
    gap: 8px;
    margin-bottom: 30px;
  }

  .dc-tour-filter-btn {
    min-height: 40px;
    padding: 8px 18px;
    font-size: 13px;
  }

  .dc-tour-gallery-grid {
    gap: 14px;
  }

  .dc-facility-overlay {
    padding: 18px 14px 14px;
  }

  .dc-facility-title {
    font-size: 17px;
  }

  .dc-modal-close {
    top: 14px;
    right: 14px;
    width: 40px;
    height: 40px;
    font-size: 22px;
  }

  .dc-modal-prev {
    left: 10px;
  }

  .dc-modal-next {
    right: 10px;
  }

  .dc-modal-nav {
    width: 38px;
    height: 38px;
    font-size: 18px;
  }

  .dc-modal-figure img {
    max-height: 70vh;
  }
}

/* --------------------------------------------------------------------------
   12. Reduced motion
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  .dc-about-tour-section,
  .dc-tour-filter-btn,
  .dc-facility-card,
  .dc-facility-card img,
  .dc-facility-overlay,
  .dc-modal-content,
  .dc-modal-close,
  .dc-modal-nav,
  .dc-modal-figure img {
    transition: none;
  }

  .dc-facility-card:hover,
  .dc-facility-card:focus-visible {
    transform: none;
  }

  .dc-facility-card:hover img,
  .dc-facility-card:focus-visible img {
    transform: none;
  }

  .dc-tour-filter-btn:hover {
    transform: none;
  }

  .dc-modal-nav.dc-modal-prev:hover,
  .dc-modal-nav.dc-modal-next:hover {
    transform: translateY(-50%);
  }

  .dc-modal-close:hover {
    transform: none;
  }
}