:root {
  --safe-surface: rgba(20, 17, 14, 0.92);
  --safe-border: rgba(240, 160, 64, 0.38);
}

html {
  background: #0a0e1a;
  scroll-padding-top: 5rem;
}

body {
  isolation: isolate;
  background-color: #0a0e1a !important;
}

/* Background stack, painted bottom-up: poster image -> video -> overlay.
   The poster layer stays behind the video so a failed or blocked video
   still leaves a full-bleed background instead of a bare colour. */
.bg-image {
  z-index: -3 !important;
}

.bg-video {
  z-index: -2 !important;
  background: transparent;
}

.bg-overlay {
  z-index: -1 !important;
}

html { scroll-padding-top: 7rem; }

:focus-visible {
  outline: 3px solid #ffd08a !important;
  outline-offset: 3px;
}

.floating-nav .nav-pill[aria-current="location"] {
  color: #1a1208;
  background: #f0a040;
  border-color: #ffd08a;
}

.floating-nav .mute-btn {
  display: none;
}

.floating-nav,
.care-controls,
.reference-tools {
  transition:
    transform .32s cubic-bezier(.22, 1, .36, 1),
    opacity .22s ease,
    visibility .22s ease;
  will-change: transform, opacity;
}

.floating-nav.floating-direction-managed {
  animation: none;
}

body.floating-ui-hidden .floating-nav {
  transform: translate(-50%, calc(-100% - 2rem));
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

body.floating-ui-hidden .care-controls {
  transform: translateX(-50%) translateY(calc(100% + 2rem));
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

body.floating-ui-hidden .reference-tools {
  transform: translateY(calc(-100% - 6rem));
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.care-controls {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 100;
  padding: 8px 12px;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 9999px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.18);
  animation: navFloatInBottom 0.8s cubic-bezier(0.34, 1.56, 0.64, 1) both;
  animation-delay: 0.4s;
}

.care-control,
.care-control.bottom-audio-control,
.care-control.bottom-back-to-top {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px 16px;
  font-size: 0.8rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.65);
  white-space: nowrap;
  border-radius: 9999px;
  background: transparent;
  border: 1px solid transparent;
  transition: color 0.2s ease, background 0.25s ease, border-color 0.25s ease, transform 0.15s cubic-bezier(0.34, 1.56, 0.64, 1);
  cursor: pointer;
  font-family: var(--font-sans, system-ui, sans-serif);
}

.care-control:hover,
.care-control.bottom-audio-control:hover,
.care-control.bottom-back-to-top:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(240, 160, 64, 0.3);
  transform: scale(1.05);
}

.care-control:active,
.care-control.bottom-audio-control:active,
.care-control.bottom-back-to-top:active {
  transform: scale(0.95);
}

.care-control.quick-exit {
  color: #fff;
  border-color: rgba(255, 150, 120, 0.45);
}

.care-control.quick-exit:hover {
  color: #fff;
  background: rgba(255, 100, 80, 0.2);
  border-color: rgba(255, 130, 100, 0.6);
}

.content-notice,
.medical-note {
  max-width: 900px;
  margin: 1rem auto 1.5rem;
  padding: 1rem 1.2rem;
  border: 1px solid var(--safe-border);
  border-radius: 16px;
  color: var(--text-secondary, #ddd3c7);
  background: rgba(24, 20, 16, .82);
}

.content-notice strong,
.medical-note strong { color: var(--amber-light, #ffb84d); }

.content-notice button {
  margin-top: .7rem;
  padding: .55rem .85rem;
  border: 1px solid var(--safe-border);
  border-radius: 999px;
  color: inherit;
  background: transparent;
  cursor: pointer;
}

.reference-tools {
  position: sticky;
  top: 5.5rem;
  z-index: 20;
  display: grid;
  grid-template-columns: minmax(12rem, 1fr) auto;
  gap: .75rem;
  margin: 0 0 1.5rem;
  padding: .85rem;
  border: 1px solid var(--safe-border);
  border-radius: 16px;
  background: rgba(20,17,14,.94);
  backdrop-filter: blur(18px);
}

.reference-search {
  width: 100%;
  min-height: 44px;
  padding: .7rem .9rem;
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 10px;
  color: #fff;
  background: rgba(255,255,255,.07);
  font: inherit;
}

.reference-count { align-self: center; color: var(--text-secondary, #ddd3c7); }
.ref-entry[hidden], .reference-heading-hidden { display: none !important; }
.ref-entry a { overflow-wrap: anywhere; color: var(--amber-light, #ffb84d); }

.reference-page-title {
  margin-bottom: 1rem;
  color: var(--amber-light, #ffb84d);
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.1;
}

.mobile-nav-toggle { display: none; }

body.motion-paused .bg-video { display: none !important; }

@media (max-width: 768px) {
  .floating-nav {
    width: calc(100vw - 1rem);
    max-width: none;
    justify-content: flex-start;
    overflow-x: scroll;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-inline: contain;
    scroll-behavior: smooth;
    scroll-snap-type: x proximity;
    scrollbar-width: none;
    touch-action: pan-x;
    padding-inline: 12px;
    transition: -webkit-mask-image .2s ease, mask-image .2s ease;
  }

  .floating-nav::-webkit-scrollbar { display: none; }

  .floating-nav.can-scroll-right {
    -webkit-mask-image: linear-gradient(to right, #000 0, #000 calc(100% - 42px), transparent 100%);
    mask-image: linear-gradient(to right, #000 0, #000 calc(100% - 42px), transparent 100%);
  }

  .floating-nav.can-scroll-left:not(.can-scroll-right) {
    -webkit-mask-image: linear-gradient(to right, transparent 0, #000 42px, #000 100%);
    mask-image: linear-gradient(to right, transparent 0, #000 42px, #000 100%);
  }

  .floating-nav.can-scroll-left.can-scroll-right {
    -webkit-mask-image: linear-gradient(to right, transparent 0, #000 42px, #000 calc(100% - 42px), transparent 100%);
    mask-image: linear-gradient(to right, transparent 0, #000 42px, #000 calc(100% - 42px), transparent 100%);
  }

  .floating-nav .nav-title,
  .floating-nav .nav-pill {
    flex: 0 0 auto;
    scroll-snap-align: center;
    scroll-snap-stop: normal;
  }

  .floating-nav .nav-pill { min-height: 44px; }

  .care-controls {
    bottom: .5rem;
    justify-content: center;
  }

  .care-control,
  .care-control.bottom-audio-control,
  .care-control.bottom-back-to-top { flex: 0 0 auto; padding-inline: .55rem; }
  .reference-tools { top: .5rem; grid-template-columns: 1fr; }
  .reference-count { text-align: center; }
}

@media print {
  .care-controls, .content-notice, .reference-tools,
  .reading-progress, .header-anchor { display: none !important; }
  body { background: #fff !important; color: #1a1a2e !important; }
  .main, main { padding-top: 2rem; }
  .glass-panel-blur, .glass-panel-static, .toolkit-card {
    background: #f8f8fa !important; backdrop-filter: none !important; -webkit-backdrop-filter: none !important;
    border: 1px solid #ddd !important; box-shadow: none !important; break-inside: avoid;
  }
  section h2 { color: #c87a28 !important; border-bottom-color: #ddd !important; }
  section h3, section h4 { color: #1a1a2e !important; }
  p, li { color: #333 !important; }
  a { color: #c87a28 !important; text-decoration: underline; }
  .concept-box { background: #fafafa !important; border-color: #ddd !important; border-left-color: #c87a28 !important; }
  table thead th { color: #c87a28 !important; border-bottom-color: #ddd !important; }
  tbody td { border-bottom-color: #eee !important; }
  .site-footer { border-top-color: #ddd !important; }
}

/* ===== Reading Progress Bar ===== */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  z-index: 9999;
  background: rgba(240, 160, 64, 0.15);
  pointer-events: none;
}
.reading-progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #f0a040, #ffb84d);
  transition: width 0.1s linear;
}

/* ===== Header Anchor Links ===== */
.header-anchor {
  opacity: 0;
  margin-left: 0.5rem;
  color: var(--amber, #f0a040);
  text-decoration: none;
  font-weight: 400;
  font-size: 0.85em;
  cursor: pointer;
  transition: opacity 0.15s ease;
}
h2:hover .header-anchor,
h3:hover .header-anchor,
h4:hover .header-anchor,
.header-anchor:focus {
  opacity: 0.6;
}
.header-anchor:hover {
  opacity: 1 !important;
}

/* ===== Toast Notification ===== */
.toast {
  position: fixed;
  bottom: 90px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  padding: 10px 20px;
  background: rgba(20, 17, 14, 0.95);
  border: 1px solid rgba(240, 160, 64, 0.4);
  border-radius: 999px;
  color: #ffb84d;
  font-size: 0.85rem;
  font-weight: 500;
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

@media (max-width: 768px) {
  .reading-progress { height: 2px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto !important; }
  .floating-nav { scroll-behavior: auto !important; }
  .floating-nav,
  .care-controls,
  .reference-tools {
    transition-duration: .01ms !important;
  }
}