/* =============================================================
   Custom properties
   ============================================================= */
:root {
  --top-bar-h:    52px;
  --bottom-bar-h: 72px;

  --color-accent:   #ff8033;
  --color-primary:  #2d3436;
  --color-surface:  #fff;
  --color-bg:       #1a1a24;
  --color-border:   #e0e0e0;
  --color-text:     #222;
  --color-muted:    #666;

  --bar-bg:   rgba(16, 16, 24, 0.96);
  --bar-text: rgba(255, 255, 255, 0.9);

  --radius-sm: 5px;
  --radius-md: 8px;
  --radius-lg: 12px;

  --shadow-sm: 0 2px 6px rgba(0,0,0,0.12);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.18);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.28);
}

/* =============================================================
   Base reset
   ============================================================= */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  overflow: hidden;          /* no page scroll — canvas IS the page */
  background: var(--color-bg);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  line-height: 1.4;
  color: var(--color-text);
}

#app {
  height: 100%;
  overflow: hidden;
  position: relative;
}

/* =============================================================
   Top bar
   ============================================================= */
#top-bar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--top-bar-h);
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 10px;
  background: var(--bar-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 1000;
  box-shadow: 0 2px 12px rgba(0,0,0,0.4);
}

/* Demo tab container (#DomeDemoTabs) — class names retained from legacy Tabs styling */
.TabSelectors {
  display: flex;
  gap: 4px;
  list-style: none;
  flex: 0 1 auto;
  min-width: 0;
  overflow-x: auto;
  scrollbar-width: none;
  padding: 4px 0;
}

.TabSelectors::-webkit-scrollbar { display: none; }

.TabSelectors li {
  flex-shrink: 0;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  color: rgba(255,255,255,0.65);
  background: transparent;
  border: 1px solid transparent;
  transition: color 0.15s, background 0.15s, border-color 0.15s;
  user-select: none;
  white-space: nowrap;
}

.TabSelectors li.TabEnabled:hover {
  color: var(--bar-text);
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.15);
}

.TabSelectors li[aria-selected="true"] {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

/* Hidden buttons kept in DOM for click wiring (Reset / Play / etc.) — not shown to user */
.tab-hidden { display: none !important; }

/* Top-right control cluster: playback + time + timeline + calendar.
   Allowed to grow so the timeline can stretch; demo tabs (left) compress and scroll. */
#top-controls {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1 1 auto;
  min-width: 0;
}

.top-playback {
  display: flex;
  align-items: center;
  gap: 3px;
}

/* Sun / Moon info strip */
#sun-moon-strip {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.sms-item {
  font-size: 11px;
  color: rgba(255,255,255,0.55);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

/* Time / Day compact sliders */
.tc-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1px;
}

.tc-label {
  font-size: 10px;
  color: rgba(255,255,255,0.6);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.tc-range {
  width: 68px;
  accent-color: var(--color-accent);
  cursor: pointer;
  height: 14px;
}

/* Year timeline scrubber.
   The .timeline-range below is a native <input type=range>, restyled into a thin track
   with a chunky accent-coloured thumb. Click-anywhere + drag + touch are all free from the browser. */
.tc-timeline {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 1px;
  flex: 1 1 auto;
  min-width: 140px;
  max-width: 360px;
}

.timeline-shell {
  position: relative;
  height: 26px;
  padding: 0 1px;
}

.timeline-ticks {
  position: absolute;
  inset: 0;
  pointer-events: none;
  font-size: 8.5px;
  color: rgba(255,255,255,0.4);
  font-variant-numeric: tabular-nums;
}

.timeline-ticks .tk {
  position: absolute;
  top: 1px;
  left: calc(var(--p) * 100%);
  transform: translateX(-50%);
  line-height: 1;
  white-space: nowrap;
  padding-top: 0;
}
.timeline-ticks .tk::after {
  content: '';
  display: block;
  width: 1px;
  height: 5px;
  margin: 1px auto 0;
  background: rgba(255,255,255,0.25);
}

/* Native range restyled as a flat timeline track + chunky handle */
.timeline-range {
  position: absolute;
  inset: auto 0 0 0;
  width: 100%;
  height: 14px;
  margin: 0;
  background: transparent;
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
  touch-action: none;
}

.timeline-range::-webkit-slider-runnable-track {
  height: 4px;
  border-radius: 2px;
  background: rgba(255,255,255,0.18);
}
.timeline-range::-moz-range-track {
  height: 4px;
  border-radius: 2px;
  background: rgba(255,255,255,0.18);
}

.timeline-range::-webkit-slider-thumb {
  appearance: none;
  -webkit-appearance: none;
  width: 4px;
  height: 14px;
  margin-top: -5px;
  border-radius: 2px;
  background: var(--color-accent);
  border: none;
  box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.35);
  cursor: grab;
}
.timeline-range:active::-webkit-slider-thumb { cursor: grabbing; }
.timeline-range::-moz-range-thumb {
  width: 4px;
  height: 14px;
  border-radius: 2px;
  background: var(--color-accent);
  border: none;
  box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.35);
  cursor: grab;
}
.timeline-range:active::-moz-range-thumb { cursor: grabbing; }

.timeline-range:focus-visible::-webkit-slider-thumb {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}
.timeline-range:focus-visible::-moz-range-thumb {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.timeline-label {
  font-size: 10px;
  color: rgba(255,255,255,0.7);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
  text-align: center;
}

/* Calendar display — pinned to the right edge of the top bar regardless of how
   the timeline / sun-moon strip / playback cluster grow. `margin-left: auto`
   absorbs any leftover flex space before the calendar. */
#calendar-widget {
  position: relative;
  flex-shrink: 0;
  margin-left: auto;
}

#calendar-toggle {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 5px 9px;
  border: none;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.07);
  color: rgba(255,255,255,0.75);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  cursor: pointer;
  transition: background 0.15s;
}

#calendar-toggle:hover { background: rgba(255,255,255,0.13); }
#calendar-toggle[aria-expanded="true"] { background: rgba(255,255,255,0.15); color: #fff; }

#calendar-display { font-size: 12px; }

/* Calendar dropdown */
#calendar-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  z-index: 200;
  min-width: 230px;
  background: var(--bar-bg);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

#calendar-dropdown[hidden] { display: none; }

/* Digit-scroll spinbutton row */
.cal-digits {
  display: flex;
  align-items: center;
  gap: 3px;
  justify-content: center;
  padding: 2px 0 4px;
}

.cal-spin {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 30px;
  padding: 4px 5px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background: rgba(255,255,255,0.07);
  color: rgba(255,255,255,0.9);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  font-weight: 500;
  cursor: ns-resize;
  user-select: none;
  transition: background 0.1s, border-color 0.1s;
}

.cal-spin.cs-wide { min-width: 44px; }

.cal-spin:hover {
  background: rgba(255,255,255,0.14);
  border-color: rgba(255,255,255,0.2);
}

.cal-spin:focus {
  outline: none;
  border-color: var(--color-accent);
  background: rgba(255,128,51,0.15);
}

.cal-sep {
  color: rgba(255,255,255,0.35);
  font-size: 12px;
  padding: 0 1px;
  user-select: none;
}

.cal-utc {
  color: rgba(255,255,255,0.35);
  font-size: 10px;
  margin-left: 2px;
  user-select: none;
}

.cal-step-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 4px;
}

.cal-btn {
  padding: 5px 4px;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.06);
  color: rgba(255,255,255,0.8);
  font-size: 11px;
  cursor: pointer;
  transition: background 0.15s;
  white-space: nowrap;
  text-align: center;
}

.cal-btn:hover { background: rgba(255,255,255,0.15); color: #fff; }

/* Year progress track — thin bar at top of dropdown */
.cal-year-track {
  height: 4px;
  background: rgba(255,255,255,0.1);
  border-radius: 2px;
  overflow: hidden;
}

.cal-year-fill {
  height: 100%;
  width: 0;
  background: var(--color-accent);
  border-radius: 2px;
  transition: width 0.25s ease;
}

/* =============================================================
   Canvas — fills viewport between the two bars
   ============================================================= */
/* jsg creates #FeGraph via document.writeln(). Do NOT pre-define this element in HTML.
   jsg sets inline height = 56% of width; our CSS positions it below the top bar. */
#FeGraph {
  position: fixed !important;
  top: var(--top-bar-h) !important;
  left: 0 !important;
  right: 0 !important;
  border: none;
  padding: 0;
  margin: 0;
  overflow: hidden;
  background: #000;
  z-index: 1;
}

.JsGraph-ClippingBox {
  width: 100%;
  height: 100%;
  overflow: hidden;
  position: relative;
  font-size: 0;
  line-height: 0;
}

/* jsg sets position, top, left, width, height on the canvas via inline styles. */
.JsGraph-Canvas { display: block; }

/* =============================================================
   Bottom bar
   ============================================================= */
#bottom-bar {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  height: var(--bottom-bar-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 0 10px;
  background: var(--bar-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 1000;
  box-shadow: 0 -2px 12px rgba(0,0,0,0.4);
}

.pb-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.07);
  color: var(--bar-text);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.pb-btn:hover {
  background: rgba(255,255,255,0.15);
  border-color: rgba(255,255,255,0.3);
}

.pb-btn.pb-primary {
  width: 40px;
  height: 40px;
  background: var(--color-accent);
  border-color: var(--color-accent);
  border-radius: var(--radius-md);
}

.pb-btn.pb-primary:hover {
  background: #ff9a55;
  border-color: #ff9a55;
}

/* Green when playing — clearly distinct from the orange "press to play" state */
.pb-btn[aria-pressed="true"].pb-primary {
  background: #00b894;
  border-color: #00b894;
}

.pb-btn[aria-pressed="true"].pb-primary:hover {
  background: #00cfa8;
  border-color: #00cfa8;
}

/* Speed cycle button — click cycles forward, shift-click / right-click cycles back */
.pb-speed-btn {
  height: 30px;
  min-width: 56px;
  padding: 0 10px;
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-sm);
  color: var(--bar-text);
  font-size: 12px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
  transition: background 0.15s, border-color 0.15s, transform 0.08s;
}

.pb-speed-btn:hover {
  background: rgba(255,255,255,0.13);
  border-color: rgba(255,255,255,0.3);
}

.pb-speed-btn:active { transform: scale(0.96); }

.pb-speed-btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}

/* Reset button — same size as other pb-btn, slightly muted */
.pb-btn.pb-reset {
  color: rgba(255,255,255,0.55);
  margin-left: 2px;
}

.pb-btn.pb-reset:hover {
  color: var(--bar-text);
}

/* Layer toggles */
.layer-section {
  display: flex;
  align-items: center;
  gap: 2px;
  overflow-x: auto;
  scrollbar-width: none;
}

.layer-section::-webkit-scrollbar { display: none; }

.layer-toggle {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 4px 7px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: transparent;
  color: rgba(255,255,255,0.35);
  cursor: pointer;
  transition: color 0.15s, background 0.15s, border-color 0.15s;
  white-space: nowrap;
  min-width: 44px;
}

.layer-toggle:hover {
  color: rgba(255,255,255,0.75);
  background: rgba(255,255,255,0.08);
}

.layer-toggle[aria-pressed="true"] {
  color: #fff;
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.2);
}

.toggle-label {
  font-size: 10px;
  line-height: 1;
  display: none; /* mobile-first: shown only at ≥768px */
}

/* =============================================================
   Rays + Luminaries sections (bottom bar, right side).
   Each is a dedicated visually-separated group with a divider on its left edge. */
.rays-section,
.luminary-section {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 3px 6px;
  border-left: 1px solid rgba(255,255,255,0.12);
  flex-shrink: 0;
}

/* Parameter sliders in bottom bar */
.param-section {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.param-slider {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.param-label {
  font-size: 10px;
  color: rgba(255,255,255,0.55);
  white-space: nowrap;
  cursor: pointer;
  font-variant-numeric: tabular-nums;
}

.param-val {
  color: rgba(255,255,255,0.85);
  font-weight: 500;
}

.param-range {
  width: 72px;
  accent-color: var(--color-accent);
  cursor: pointer;
  height: 14px;
}

/* =============================================================
   Save / Restore panel — styled to match the dark top/bottom bars.
   Positioned top-left under the top bar (out of the canvas focus area) and
   collapsed by default; click the summary to expand inline. */
.save-restore {
  position: fixed;
  top: calc(var(--top-bar-h) + 8px);
  left: 12px;
  width: 280px;
  background: var(--bar-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  color: var(--bar-text);
  z-index: 900;
  max-height: calc(100vh - var(--top-bar-h) - var(--bottom-bar-h) - 24px);
  overflow: auto;
}

.save-restore summary {
  padding: 10px 14px;
  cursor: pointer;
  font-weight: 600;
  font-size: 12px;
  color: var(--bar-text);
  list-style: none;
  user-select: none;
}

.save-restore summary::-webkit-details-marker { display: none; }
.save-restore summary::before { content: '+ '; color: rgba(255,255,255,0.5); font-weight: 400; }
.save-restore[open] summary::before { content: '− '; }

.save-restore-body { padding: 10px 14px 14px; border-top: 1px solid rgba(255,255,255,0.1); }

.save-restore-body textarea {
  width: 100%;
  font-family: 'SF Mono', Consolas, monospace;
  font-size: 11px;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-sm);
  padding: 6px;
  resize: vertical;
  background: rgba(255,255,255,0.05);
  color: var(--bar-text);
}

.save-restore-body textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  background: rgba(255,255,255,0.08);
}

.save-restore-body p {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

/* Match the .pb-speed-btn styling so the playback bar and save/restore feel like one app. */
.save-restore-body button {
  height: 26px;
  padding: 0 10px;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.07);
  color: var(--bar-text);
  font-size: 11px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.save-restore-body button:hover {
  background: rgba(255,255,255,0.13);
  border-color: rgba(255,255,255,0.3);
}

/* =============================================================
   Focus — never suppress globally
   ============================================================= */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* =============================================================
   ≥ 768px: show text labels under layer toggle icons
   ============================================================= */
@media (min-width: 768px) {
  .toggle-label { display: block; }
}

/* =============================================================
   Mobile (≤ 480px): compact bars, icon-only toggles, scrollable top bar
   ============================================================= */
@media (max-width: 480px) {
  :root {
    --top-bar-h:    44px;
    --bottom-bar-h: 56px;
  }

  #top-bar { gap: 4px; padding: 0 6px; overflow-x: auto; }

  #sun-moon-strip { display: none; }

  .layer-toggle { min-width: 32px; padding: 5px 4px; }

  .TabSelectors li { padding: 4px 8px; font-size: 12px; }

  .pb-btn { width: 28px; height: 28px; }
  .pb-btn.pb-primary { width: 34px; height: 34px; }
  .pb-speed-btn { font-size: 11px; height: 26px; min-width: 48px; padding: 0 7px; }
  .tc-timeline { min-width: 100px; }
  .timeline-ticks { font-size: 7.5px; }

  .tc-range { width: 52px; }
}

/* =============================================================
   Gesture hint pill (fades out via ui.js after 5 s)
   ============================================================= */
#gesture-hint {
  position: fixed;
  bottom: calc(var(--bottom-bar-h) + 14px);
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.62);
  color: rgba(255, 255, 255, 0.85);
  font-size: 11px;
  font-family: inherit;
  padding: 5px 14px;
  border-radius: 20px;
  pointer-events: none;
  z-index: 500;
  white-space: nowrap;
  transition: opacity 0.9s;
}

/* Touch-only / coarse-pointer devices: hide modifier + scroll hint */
@media (hover: none) and (pointer: coarse) {
  .gh-fine { display: none; }
}

/* =============================================================
   Reduced motion: cut all transitions and animations
   ============================================================= */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}