:root {
  color-scheme: dark;
  --bg: #060608;
  --panel: #111319;
  --panel-2: #181a20;
  --text: #f6f3e8;
  --muted: #aeb4bd;
  --line: #313742;
  /* Interactive component boundaries (inputs, ghost/mode buttons) need >=3:1 against
     their fills (WCAG 1.4.11 non-text contrast); --line at 1.45–1.65:1 is for
     decorative hairlines only. #616a7c measures 3.2:1 vs #181a20 and 3.6:1 vs #090b0f. */
  --line-strong: #616a7c;
  --gold: #f7b733;
  --amber: #ff6f3c;
  --teal: #40d6c8;
  --magenta: #d958a7;
  --green: #8fd17f;
  --danger: #ff5964;
  --focus-ring: #7cc4ff;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
}

button,
input {
  font: inherit;
}

/* Accessible focus indicator: one high-contrast ring for every keyboard-focused
   control. Components must NOT set `outline: none` — a same-colour border change
   is invisible (that was the bug). The 2px offset sits the ring on the dark panel
   behind the control, so it stays >=3:1 even over the gold button fills. */
:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

.app-shell {
  min-height: 100vh;
  background: radial-gradient(circle at 35% 35%, #221309 0, #060608 38rem);
  overflow-x: hidden; /* keep the collapsed (slid-out) panel from adding a horizontal scrollbar */
}

.stage-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(19rem, 27rem);
  gap: 1.25rem;
  /* The Sun is the hero: the first section fills the screen so the disk is
     above the fold. The text column scrolls inside its own cell instead of
     stretching the visual column into a void. dvh tracks iOS Safari's dynamic
     toolbar (100vh overflows while the toolbar is visible); vh is the fallback. */
  height: 100vh;
  height: 100dvh;
  min-height: 40rem;
  align-items: stretch;
  padding: 1rem;
  position: relative; /* containing block for the slid-out panel when collapsed */
}

.viewport {
  position: relative;
  display: grid;
  place-items: center;
  height: 100%;
  min-height: 0;
  border: 1px solid #1f232c;
  background: #050507;
  overflow: hidden;
}

#solarCanvas {
  width: min(78vh, 100%);
  max-width: 58rem;
  aspect-ratio: 1 / 1;
  display: block;
  cursor: crosshair;
}

.scene-badge {
  position: absolute;
  top: 1rem;
  left: 1rem;
  z-index: 2;
  max-width: min(26rem, calc(100% - 2rem));
  padding: 0.55rem 0.7rem;
  border: 1px solid rgba(247, 183, 51, 0.55);
  background: rgba(7, 8, 10, 0.76);
  color: var(--text);
  font-weight: 800;
  backdrop-filter: blur(8px);
}

.stage-rail {
  position: absolute;
  top: 1rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  gap: 0.3rem;
  max-width: calc(100% - 2rem);
  padding: 0.35rem 0.4rem;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(7, 8, 10, 0.74);
  backdrop-filter: blur(8px);
}

.stage-step {
  padding: 0.3rem 0.6rem;
  font-size: 0.8rem;
  color: var(--muted);
  border: 1px solid transparent;
  white-space: nowrap;
}

.stage-step.active {
  color: #1a1206;
  background: var(--gold);
  border-color: var(--gold);
  font-weight: 800;
}

.base-label {
  position: absolute;
  top: 3.9rem;
  left: 1rem;
  z-index: 2;
  max-width: calc(100% - 2rem);
  padding: 0.4rem 0.55rem;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(7, 8, 10, 0.74);
  color: #dce2e6;
  font-size: 0.74rem;
  backdrop-filter: blur(8px);
  overflow-wrap: anywhere;
}

.base-label.observed {
  border-color: rgba(64, 214, 200, 0.6);
  color: #dffaf7;
}

.base-label.synthetic {
  border-color: rgba(247, 183, 51, 0.6);
  color: #f7e4b2;
}

.status-strip {
  position: absolute;
  left: 1rem;
  right: 1rem;
  bottom: 1rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.5rem;
  padding: 0.75rem;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(8, 9, 12, 0.78);
  backdrop-filter: blur(10px);
}

.control-panel {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1rem;
  /* Liquid glass: translucent + a backdrop blur of whatever is behind it (the 3-D view on the orrery
     surface, where the panel overlays the full-bleed canvas). */
  background: rgba(16, 18, 26, 0.55);
  backdrop-filter: blur(20px) saturate(135%);
  -webkit-backdrop-filter: blur(20px) saturate(135%);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 16px;
  box-shadow: 0 10px 44px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.08);
  height: 100%;
  min-height: 0;
  overflow: auto;
  position: relative;
  z-index: 5;
  transition: transform 0.28s ease, opacity 0.22s ease;
}
.control-panel > header { padding-right: 2.4rem; } /* clear the floating collapse button */

/* On the 3-D view, the full-bleed canvas spans the whole stage; the glass panel floats over its right
   side (so the blur is of the actual 3-D scene), and collapsing it gives an unobstructed full view. */
body[data-surface="orrery"] .viewport { grid-column: 1 / -1; }

/* The panel MUST be lifted out of grid flow to actually float. Spanning the viewport across both
   columns (above) pushes the still-in-flow panel into a SECOND grid row, whose tall content steals
   all the height and collapses the absolutely-positioned canvas to 0px — the entire 3-D scene
   vanishes. Floating it (with the stage-band as the positioned ancestor) lets the viewport own the
   full 100vh; the panel keeps its own internal scroll via overflow:auto. Desktop only — narrow
   screens keep the stacked layout from the media query below. */
@media (min-width: 881px) {
  body[data-surface="orrery"] .control-panel {
    position: absolute;
    top: 1rem;
    right: 1rem;
    bottom: 1rem;
    height: auto;
    width: min(27rem, calc(100% - 2rem));
    z-index: 6;
  }
}

/* Collapsed: the panel slides out and the viewport takes the full width. The panel is pulled OUT of
   grid flow (absolute) so the now-single-column stage-band can't stack it into a second row beneath
   the viewport — that row, though slid out and transparent, left a tall scrollable void (the
   app-shell gradient) under the Sun on the 2-D surfaces. */
body.panel-collapsed .stage-band { grid-template-columns: minmax(0, 1fr); }
body.panel-collapsed .control-panel {
  position: absolute;
  top: 1rem;
  right: 1rem;
  bottom: 1rem;
  width: min(27rem, calc(100% - 2rem));
  transform: translateX(115%);
  opacity: 0;
  pointer-events: none;
}

/* Floating pin/collapse toggle. */
.panel-toggle {
  position: fixed;
  top: 1.35rem;
  right: 1.35rem;
  z-index: 30;
  height: 2rem;
  padding: 0 0.7rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(20, 22, 30, 0.55);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.4);
  color: #e8e6dd;
  cursor: pointer;
  font: 600 0.85rem "Segoe UI", system-ui, sans-serif;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}
.panel-toggle:hover { background: rgba(40, 44, 56, 0.72); }

.eyebrow,
.label {
  margin: 0;
  color: var(--muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0.75rem;
  font-size: clamp(1.55rem, 2.6vw, 2rem);
  line-height: 1.05;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 0.4rem;
  font-size: 1.05rem;
  letter-spacing: 0;
}

.insight {
  color: #e9e2cc;
  line-height: 1.45;
}

.summary-panel {
  padding: 0.85rem;
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  background: #101316;
}

.summary-panel strong {
  display: block;
  margin-top: 0.3rem;
  font-size: 1.02rem;
  line-height: 1.25;
}

.summary-panel p {
  margin: 0.4rem 0 0;
  color: var(--muted);
  line-height: 1.42;
}

.state-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.65rem;
}

.state-pill,
.timeline-link,
.legend-chip {
  min-height: 1.8rem;
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--line);
  background: #090b0f;
  color: #dce2e6;
  font-size: 0.78rem;
  text-decoration: none;
  overflow-wrap: anywhere;
}

.state-pill.live,
.state-pill.cached,
.state-pill.research-ready {
  border-color: rgba(64, 214, 200, 0.65);
  color: #dffaf7;
}

.state-pill.fixture,
.state-pill.research-only {
  border-color: rgba(247, 183, 51, 0.72);
  color: #f7e4b2;
}

.state-pill.degraded,
.state-pill.blocked {
  border-color: rgba(255, 89, 100, 0.72);
  color: #ffd4d8;
}

.timeline-link {
  border-color: rgba(246, 243, 232, 0.22);
}

.mode-nav {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.mode-group-label {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.4rem;
}

.mode-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.45rem;
}

/* The top-level destination nav: three equal columns (The Sun · My Sky · Solar System). */
.mode-grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.mode-button {
  min-height: 2.6rem;
  border: 1px solid var(--line-strong);
  background: var(--panel-2);
  color: var(--text);
  cursor: pointer;
}

.mode-button.active {
  border-color: var(--gold);
  background: #2b1f10;
}

.layer-controls {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.55rem;
}

.layer-controls label {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  min-height: 2.25rem;
  color: #e3e6e8;
}

.layer-legend {
  display: grid;
  gap: 0.45rem;
}

.legend-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.legend-chip.synthetic {
  border-color: rgba(247, 183, 51, 0.58);
}

.legend-chip.observed {
  border-color: rgba(64, 214, 200, 0.62);
}

.legend-chip.blended,
.legend-chip.inferred {
  border-color: rgba(217, 88, 167, 0.58);
}

.legend-chip.degraded {
  border-color: rgba(255, 89, 100, 0.62);
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border: 1px solid var(--line);
}

.metric-grid > div {
  min-height: 4.4rem;
  padding: 0.75rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.metric-grid > div:nth-child(2n) {
  border-right: 0;
}

.metric-grid > div:nth-last-child(-n + 2) {
  border-bottom: 0;
}

.metric-grid strong,
.status-strip strong {
  display: block;
  margin-top: 0.25rem;
  overflow-wrap: anywhere;
}

.mode-copy,
.application-panel {
  padding: 0.85rem;
  border-left: 3px solid var(--teal);
  background: #10161a;
}

.application-panel {
  border-left-color: var(--gold);
}

.application-panel strong {
  display: block;
  margin-top: 0.25rem;
}

.application-panel p {
  margin: 0.35rem 0 0;
  color: var(--muted);
  line-height: 1.4;
}

.signal-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.65rem;
}

.signal-chip {
  min-height: 1.7rem;
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.48rem;
  border: 1px solid rgba(247, 183, 51, 0.42);
  background: #090b0f;
  color: #f1e5c4;
  font-size: 0.76rem;
  overflow-wrap: anywhere;
}

.selection-panel {
  padding: 0.8rem;
  border: 1px solid var(--line);
  background: #0e1217;
}

.selection-panel.selected {
  border-color: rgba(247, 183, 51, 0.72);
  background: #15120c;
}

.selection-panel strong {
  display: block;
  margin-top: 0.25rem;
  line-height: 1.25;
}

.selection-panel p {
  margin: 0.35rem 0 0;
  color: var(--muted);
  line-height: 1.4;
}

.mode-copy p,
.timeline-copy p,
.research-list dd {
  color: var(--muted);
  line-height: 1.45;
}

.research-panel {
  border: 1px solid var(--line);
  background: #0d0f13;
}

.research-panel summary {
  min-height: 2.8rem;
  padding: 0.8rem;
  cursor: pointer;
}

.equation-block {
  display: grid;
  gap: 0.5rem;
  padding: 0 0.8rem 0.8rem;
}

.equation-block code {
  display: block;
  padding: 0.75rem;
  overflow-x: auto;
  background: #050507;
  color: #f2d481;
  border: 1px solid #252b34;
}

.research-list {
  margin: 0;
  padding: 0 0.8rem 0.8rem;
}

.research-list div {
  padding: 0.65rem 0;
  border-top: 1px solid #242933;
}

.research-list dt {
  font-weight: 700;
}

.research-list dd {
  margin: 0.2rem 0 0;
  overflow-wrap: anywhere;
}

.research-list a {
  color: #dffaf7;
}

.status-checklist {
  display: grid;
  gap: 0.45rem;
  margin: 0.35rem 0 0;
  padding: 0;
  list-style: none;
}

.status-checklist-item {
  display: grid;
  grid-template-columns: 4.7rem minmax(0, 1fr);
  gap: 0.55rem;
  align-items: start;
  padding: 0.55rem;
  border: 1px solid #242933;
  background: #090b0f;
}

.status-checklist-item.pass {
  border-color: rgba(64, 214, 200, 0.42);
}

.status-checklist-item.blocked {
  border-color: rgba(255, 89, 100, 0.42);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 1.45rem;
  padding: 0.12rem 0.35rem;
  border: 1px solid var(--line);
  font-size: 0.68rem;
  font-weight: 800;
}

.status-badge.pass {
  border-color: rgba(64, 214, 200, 0.7);
  color: #dffaf7;
}

.status-badge.blocked {
  border-color: rgba(255, 89, 100, 0.7);
  color: #ffd4d8;
}

.status-copy {
  display: grid;
  gap: 0.2rem;
}

.status-copy span {
  color: var(--muted);
}

.timeline-band {
  padding: 1rem;
  background: #0b0d10;
  border-top: 1px solid #222833;
}

.timeline-inner {
  display: grid;
  grid-template-columns: minmax(16rem, 24rem) minmax(0, 1fr);
  gap: 1rem;
  align-items: center;
}

#butterflyCanvas {
  width: 100%;
  height: clamp(8rem, 22vw, 13rem);
  border: 1px solid #2b303b;
  background: #08090c;
  cursor: crosshair;
}

.timeline-controls {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  margin-top: 0.85rem;
}

.time-scrubber {
  flex: 1;
  min-width: 6rem;
  accent-color: var(--gold);
  cursor: pointer;
}

.time-btn {
  min-height: 2.2rem;
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--gold);
  background: #2b1f10;
  color: var(--text);
  font-weight: 700;
  white-space: nowrap;
  cursor: pointer;
}

.time-btn.ghost {
  border-color: var(--line-strong);
  background: var(--panel-2);
  font-weight: 400;
}

.time-btn:hover,
.time-btn:focus-visible {
  border-color: var(--gold);
}

.time-frame-label {
  margin: 0.55rem 0 0;
  color: var(--gold);
  font-size: 0.85rem;
}

.live-engine {
  margin-top: 1rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--line);
}

.live-engine .time-frame-label {
  color: var(--teal);
}

/* Keyboard/AT-accessible active-region picker (mirrors clicking a disk marker). */
.region-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.4rem;
}

.region-chip {
  min-height: 2.1rem;
  padding: 0.3rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel-2);
  color: var(--text);
  font-size: 0.82rem;
  cursor: pointer;
  white-space: nowrap;
}

.region-chip:hover {
  border-color: var(--gold);
}

.region-chip.selected {
  border-color: var(--gold);
  background: #2b1f10;
  font-weight: 700;
}

/* Sky "Up now" rows are focusable buttons (keyboard preview + pin). */
.sky-row[role="button"] {
  cursor: pointer;
}

/* Solar System control groups — the Sun panel's <details> disclosure ported here so
   the orrery's dense controls aren't one flat wall. Own class (not .sun-section,
   which is display:none on this surface) but visually identical. */
.orrery-group {
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.02);
  margin-top: 0.6rem;
}

.orrery-group > summary {
  cursor: pointer;
  list-style: none;
  padding: 0.55rem 0.8rem;
  font: 600 0.9rem "Segoe UI", system-ui, sans-serif;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.orrery-group > summary::-webkit-details-marker { display: none; }

.orrery-group > summary::after {
  content: "▸";
  color: rgba(247, 183, 51, 0.85);
  transition: transform 0.15s ease;
}

.orrery-group[open] > summary::after { transform: rotate(90deg); }
.orrery-group > summary:hover { background: rgba(255, 255, 255, 0.04); }

.orrery-group-body {
  padding: 0 0.8rem 0.8rem;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.orrery-check-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.9rem;
}

.orrery-camera-row {
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.orrery-focus-label { gap: 0.4rem; }
.orrery-focus-select { width: auto; }

/* ---- My Sky surface ---- */
#skyCanvas {
  width: min(78vh, 100%);
  max-width: 58rem;
  aspect-ratio: 1 / 1;
  display: none;
  cursor: default;
}

body[data-surface="sky"] #skyCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  max-width: none;
  aspect-ratio: auto;
}

/* Hover tooltip for a sky object (rise/transit/set + trajectory note). */
.sky-tooltip {
  position: fixed;
  z-index: 50;
  pointer-events: none;
  max-width: 17rem;
  padding: 0.5rem 0.65rem;
  border: 1px solid rgba(247, 183, 51, 0.5);
  border-radius: 0.35rem;
  background: rgba(8, 10, 16, 0.92);
  color: var(--text);
  font-size: 0.8rem;
  line-height: 1.35;
  box-shadow: 0 6px 22px rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(6px);
}
.sky-tooltip strong { color: #ffe39a; font-size: 0.92rem; }
.sky-tooltip .tt-line { color: rgba(228, 234, 246, 0.86); }
.sky-tooltip .muted { color: rgba(170, 180, 200, 0.7); }

.sky-row.sky-subhead {
  margin-top: 0.4rem;
  color: rgba(247, 183, 51, 0.8);
  font: 600 0.74rem "Segoe UI", system-ui, sans-serif;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.sky-row.sky-hoverable { cursor: pointer; }
.sky-row.sky-hoverable:hover { background: rgba(247, 183, 51, 0.08); }

/* Live accuracy / validity readout under the time controls. */
.epoch-accuracy {
  margin: 0.4rem 0 0;
  padding: 0.3rem 0.5rem;
  border-left: 3px solid var(--muted);
  font-size: 0.74rem;
  line-height: 1.35;
  color: rgba(220, 226, 240, 0.8);
  background: rgba(255, 255, 255, 0.03);
}
.epoch-accuracy:empty { display: none; }
.epoch-accuracy.acc-good { border-left-color: #4caf72; }
.epoch-accuracy.acc-ok { border-left-color: #d8b24a; }
.epoch-accuracy.acc-rough { border-left-color: #d8744a; }

.sky-panel {
  display: none;
}

body[data-surface="sky"] #skyCanvas {
  display: block;
}

body[data-surface="sky"] .sky-panel {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* Hide the Sun-centric chrome when the sky view is active. */
body[data-surface="sky"] #solarCanvas,
body[data-surface="sky"] #stageRail,
body[data-surface="sky"] #baseLabel,
body[data-surface="sky"] .status-strip,
body[data-surface="sky"] .control-panel > header,
body[data-surface="sky"] .summary-panel,
body[data-surface="sky"] .sun-section,
body[data-surface="sky"] .wavelength-panel,
body[data-surface="sky"] .timeline-band {
  display: none !important;
}

/* The top-down orbit view is now a camera toggle inside the 3-D View surface (orrery.js);
   the standalone Solar System surface was folded in to remove the duplicate of the same data. */
.sys-range {
  width: 100%;
  margin-top: 0.35rem;
}

.sys-zoom-row {
  display: block;
  margin-top: 0.75rem;
}

/* ---- 3-D View (WebGPU orrery) ---- */
#orreryCanvas {
  width: min(78vh, 100%);
  max-width: 58rem;
  aspect-ratio: 1 / 1;
  display: none;
  cursor: grab;
  background: #04060c;
  touch-action: none;
}

#orreryCanvas:active {
  cursor: grabbing;
}

.orrery-panel {
  display: none;
}

/* Projected planet name labels overlaid on the WebGPU/WebGL2 canvas. */
.orrery-labels {
  position: absolute;
  pointer-events: none;
  display: none;
  z-index: 2;
}

body[data-surface="orrery"] .orrery-labels {
  display: block;
}

.orrery-label {
  position: absolute;
  transform: translate(0.5rem, -50%);
  color: rgba(232, 238, 255, 0.88);
  font: 600 0.72rem "Segoe UI", system-ui, sans-serif;
  white-space: nowrap;
  text-shadow: 0 1px 3px #000, 0 0 2px #000;
}

/* Celestial-backdrop marker labels (pulsars, galaxies, bright stars). */
.orrery-label.sky-pulsar {
  color: rgba(140, 240, 255, 0.92);
  font-weight: 600;
  font-size: 0.66rem;
  letter-spacing: 0.02em;
}
.orrery-label.sky-galaxy {
  color: rgba(216, 196, 255, 0.85);
  font-weight: 500;
  font-size: 0.66rem;
}
.orrery-label.sky-star {
  color: rgba(232, 236, 246, 0.7);
  font-weight: 500;
  font-size: 0.64rem;
}

/* 3-D View control checkboxes. */
.orrery-check {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.78rem;
  color: rgba(232, 238, 255, 0.82);
  cursor: pointer;
  white-space: nowrap;
}
.orrery-check input {
  accent-color: #f7b733;
}

body[data-surface="orrery"] #orreryCanvas {
  display: block;
  /* Fill the whole viewport instead of a centred 78vh square — the perspective camera uses the
     canvas aspect ratio, so a full-bleed rectangle just shows more sky. Absolute inset:0 against the
     position:relative .viewport sidesteps grid/flex percentage-height quirks. Filling also raises the
     backing-store resolution (ensureSized scales it by devicePixelRatio off the displayed size). */
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  max-width: none;
  aspect-ratio: auto;
}

body[data-surface="orrery"] .orrery-panel {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

body[data-surface="orrery"] #solarCanvas,
body[data-surface="orrery"] #stageRail,
body[data-surface="orrery"] #baseLabel,
body[data-surface="orrery"] .status-strip,
body[data-surface="orrery"] .control-panel > header,
body[data-surface="orrery"] .summary-panel,
body[data-surface="orrery"] .sun-section,
body[data-surface="orrery"] .wavelength-panel,
body[data-surface="orrery"] .timeline-band {
  display: none !important;
}

/* ---- Solar wavelength selector (the Sun, filterable by SDO channel) ---- */
.wavelength-panel {
  margin-top: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.wavelength-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}
.wl-chip {
  border: 1px solid var(--line-strong, rgba(255, 255, 255, 0.3));
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
  color: #e8e6dd;
  font: 600 0.74rem "Segoe UI", system-ui, sans-serif;
  padding: 0.28rem 0.6rem;
  min-height: 1.5rem; /* 24px touch-target floor */
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}
.wl-chip::before {
  content: "";
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  background: var(--wl, #f6aa45);
}
.wl-chip:hover { background: rgba(255, 255, 255, 0.07); }
.wl-chip.active {
  border-color: var(--wl, var(--gold, #f7b733));
  background: rgba(247, 183, 51, 0.12);
  color: #fff;
}

/* ---- "Inside the Sun" cutaway cross-section ---- */
.sun-cutaway svg { width: 100%; max-width: 340px; height: auto; display: block; margin: 0 auto; }
.layer-list { display: flex; flex-direction: column; gap: 0.55rem; margin-top: 0.7rem; }
.layer-row { display: flex; gap: 0.55rem; font-size: 0.82rem; line-height: 1.4; color: rgba(220, 226, 240, 0.82); }
.layer-row strong { color: #f0ede4; }
.layer-row .muted { color: rgba(220, 226, 240, 0.62); }
.layer-rad { color: rgba(220, 226, 240, 0.9); }
.layer-dot {
  flex: 0 0 auto;
  width: 0.7rem;
  height: 0.7rem;
  margin-top: 0.28rem;
  border-radius: 50%;
  background: var(--c, #fff);
  box-shadow: 0 0 6px var(--c, #fff);
}

/* ---- "The Sun" surface: one destination, depth revealed in progressive-disclosure drawers ---- */
.sun-section {
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.02);
  margin-top: 0.75rem;
  overflow: hidden;
}
.sun-section > summary {
  cursor: pointer;
  list-style: none;
  padding: 0.7rem 0.9rem;
  font: 600 0.92rem "Segoe UI", system-ui, sans-serif;
  color: #f0ede4;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}
.sun-section > summary::-webkit-details-marker { display: none; }
.sun-section > summary::after {
  content: "▸";
  color: rgba(247, 183, 51, 0.85);
  transition: transform 0.15s ease;
}
.sun-section[open] > summary::after { transform: rotate(90deg); }
.sun-section > summary:hover { background: rgba(255, 255, 255, 0.04); }
.sun-section > .sun-section-body {
  padding: 0 0.9rem 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}
/* Sections nested in a drawer drop their own outer chrome — the drawer provides it. */
.sun-section .layer-controls,
.sun-section .layer-legend,
.sun-section .metric-grid,
.sun-section .selection-panel,
.sun-section .application-panel {
  margin: 0;
}

.detail-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.28rem 0.85rem;
  margin: 0.55rem 0 0;
  font-size: 0.9rem;
}

.detail-grid dt {
  color: var(--muted);
}

.detail-grid dd {
  margin: 0;
  color: var(--text);
}

.sky-header h1 {
  font-size: clamp(1.4rem, 2.4vw, 1.9rem);
  margin-bottom: 0.5rem;
}

.sky-observer,
.sky-source,
.sky-time {
  padding: 0.85rem;
  border: 1px solid var(--line);
  border-left: 3px solid var(--teal);
  background: #10161a;
}

.sky-input-wide {
  width: auto;
  flex: 1 1 11rem;
  min-width: 9rem;
}

.sky-source {
  border-left-color: var(--gold);
}

.time-btn.active {
  background: var(--gold);
  color: #15110a;
  border-color: var(--gold);
}

.sky-loc-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.55rem;
}

.sky-input {
  width: 5.5rem;
  min-height: 2.2rem;
  padding: 0.35rem 0.4rem;
  border: 1px solid var(--line-strong);
  background: #090b0f;
  color: var(--text);
}

.sky-list {
  display: grid;
  gap: 0.45rem;
  margin-top: 0.55rem;
}

.sky-row {
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  background: #0e1217;
}

.sky-row strong {
  display: block;
}

.sky-row .muted {
  color: var(--muted);
  font-size: 0.85rem;
}

/* Aurora outlook — the location-aware verdict inside the space-weather drawer. The left
   accent encodes the verdict tier without relying on color alone (the headline says it). */
.aurora-outlook {
  margin: 0.5rem 0 0.65rem;
  padding: 0.5rem 0.7rem;
  border-left: 3px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.03);
  font-size: 0.86rem;
  line-height: 1.45;
}
.aurora-outlook strong { display: block; margin-bottom: 0.15rem; }
.aurora-outlook.aurora-overhead { border-left-color: #6fd08c; }
.aurora-outlook.aurora-horizon { border-left-color: var(--gold); }
.aurora-outlook.aurora-unlikely { border-left-color: var(--line-strong); }
.aurora-outlook.aurora-unknown { border-left-color: var(--muted); color: var(--muted); }

/* Glossary term affordance + tooltip (plain-language help on hover/focus/tap). */
.term {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  /* 24px minimum touch target (WCAG 2.5.8) — 1.15rem ≈ 18px was below the floor. */
  width: 1.5rem;
  height: 1.5rem;
  margin-left: 0.15rem;
  padding: 0;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: #090b0f;
  color: var(--muted);
  font-size: 0.7rem;
  font-weight: 700;
  line-height: 1;
  cursor: help;
  vertical-align: middle;
}

.term:hover,
.term:focus-visible {
  border-color: var(--gold);
  color: var(--gold);
}

.legend-chip[data-term] {
  cursor: help;
}

.legend-chip[data-term]:hover,
.legend-chip[data-term]:focus-visible {
  border-color: var(--gold);
}

.term-tip {
  position: fixed;
  z-index: 50;
  max-width: 18rem;
  padding: 0.55rem 0.65rem;
  border: 1px solid var(--gold);
  background: rgba(10, 11, 15, 0.97);
  color: var(--text);
  font-size: 0.82rem;
  line-height: 1.4;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
  pointer-events: none;
}

.term-tip strong {
  display: block;
  margin-bottom: 0.15rem;
  color: var(--gold);
}

.term-tip[hidden] {
  display: none;
}

/* Progressive disclosure: panels hidden on a given surface get this class in JS.
   "Today" is the beginner glance; depth is revealed on Explore/Weather/Research. */
.surface-hide {
  display: none !important;
}

.stage-step[data-term] {
  cursor: help;
}

/* Onboarding tour CTA + guided overlay. */
.tour-cta {
  align-self: start;
  margin-top: 0.2rem;
  padding: 0.5rem 0.8rem;
  border: 1px solid var(--gold);
  background: #2b1f10;
  color: var(--text);
  font-weight: 700;
  cursor: pointer;
}

.tour-cta:hover,
.tour-cta:focus-visible {
  background: #3a2912;
}

.tour-layer {
  position: fixed;
  inset: 0;
  z-index: 60;
  pointer-events: none;
}

.tour-layer[hidden] {
  display: none;
}

.tour-spot {
  position: fixed;
  border: 2px solid var(--gold);
  border-radius: 8px;
  box-shadow: 0 0 0 9999px rgba(4, 5, 8, 0.72);
  transition: all 0.18s ease;
  pointer-events: none;
}

.tour-spot.hidden {
  display: none;
}

.tour-card {
  position: fixed;
  width: min(22rem, calc(100vw - 2rem));
  padding: 0.9rem 1rem;
  border: 1px solid var(--gold);
  background: rgba(12, 13, 17, 0.98);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.6);
  pointer-events: auto;
}

.tour-card strong {
  display: block;
  margin: 0.1rem 0 0.35rem;
  font-size: 1.05rem;
}

.tour-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.45;
}

.tour-step-count {
  margin: 0 0 0.2rem;
  color: var(--gold);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.tour-actions {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin-top: 0.85rem;
}

.tour-spacer {
  flex: 1;
}

.tour-btn {
  min-height: 2.1rem;
  padding: 0.35rem 0.8rem;
  border: 1px solid var(--line-strong);
  background: var(--panel-2);
  color: var(--text);
  cursor: pointer;
}

.tour-btn.primary {
  border-color: var(--gold);
  background: var(--gold);
  color: #1a1206;
  font-weight: 700;
}

.tour-btn.ghost {
  border-color: transparent;
  background: transparent;
  color: var(--muted);
}

.tour-btn:disabled {
  opacity: 0.4;
  cursor: default;
}

@media (max-width: 880px) {
  .stage-band,
  .timeline-inner {
    grid-template-columns: 1fr;
  }

  .stage-band {
    height: auto;
    min-height: auto;
    gap: 0.8rem;
  }

  .stage-rail,
  .base-label {
    position: static;
    transform: none;
    align-self: stretch;
    max-width: none;
    margin-bottom: 0.55rem;
  }

  .stage-rail {
    justify-content: center;
    flex-wrap: wrap;
  }

  .control-panel {
    order: -1;
  }

  .viewport {
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 0;
    height: clamp(24rem, 58vh, 34rem);
    padding: 0.75rem;
  }

  .status-strip {
    position: static;
    width: 100%;
    margin-top: 0.6rem;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    padding: 0.65rem;
  }

  .scene-badge {
    position: static;
    align-self: stretch;
    width: 100%;
    max-width: none;
    margin-bottom: 0.55rem;
  }

  #solarCanvas {
    width: min(100%, 34rem, 42vh);
  }

  .control-panel {
    max-height: min(38rem, 46vh);
    overflow: auto;
    gap: 0.7rem;
  }

  .control-panel header {
    display: grid;
    gap: 0.25rem;
  }

  .insight {
    margin-bottom: 0;
  }

  .summary-panel {
    padding: 0.7rem;
  }

  .mode-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .metric-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .metric-grid > div,
  .metric-grid > div:nth-child(2n),
  .metric-grid > div:nth-last-child(-n + 2) {
    border-right: 1px solid var(--line);
    border-bottom: 0;
  }

  .metric-grid > div:last-child {
    border-right: 0;
  }
}

@media (max-width: 520px) {
  .stage-band,
  .timeline-band {
    padding: 0.65rem;
  }

  .control-panel {
    padding: 0.8rem;
  }

  h1 {
    font-size: 1.35rem;
    line-height: 1.12;
  }

  .viewport {
    height: clamp(20rem, 52vh, 27rem);
    padding: 0.55rem;
  }

  #solarCanvas {
    width: min(100%, 18rem, 32vh);
  }

  .status-strip {
    grid-template-columns: 1fr;
    gap: 0.35rem;
    padding: 0.55rem;
  }

  .status-strip > div {
    display: grid;
    grid-template-columns: 5.5rem minmax(0, 1fr);
    align-items: baseline;
    gap: 0.45rem;
  }

  .mode-grid,
  .layer-controls {
    grid-template-columns: 1fr;
  }

  .metric-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .metric-grid > div {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .metric-grid > div:nth-last-child(2) {
    border-bottom: 1px solid var(--line);
  }

  .metric-grid > div:nth-child(odd) {
    border-right: 1px solid var(--line);
  }

  .metric-grid > div:nth-last-child(-n + 2) {
    border-bottom: 0;
  }
}

/* Respect the OS motion preference: no decorative transitions/animations for users who
   asked for reduced motion. (The 3-D view's auto-animation is gated in JS — orrery.js
   checks the same media query at init.) */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
  }
}

/* Print: browsers strip dark backgrounds by default, which left pale-grey text on white.
   Flip to a light scheme and drop the interactive chrome. */
@media print {
  :root {
    color-scheme: light;
  }

  body,
  .app-shell {
    background: #fff !important;
    color: #111 !important;
  }

  .control-panel,
  .summary-panel,
  .sky-panel,
  .orrery-panel {
    color: #111 !important;
  }

  .panel-toggle,
  .tour-cta,
  .tour-layer,
  .term-tip,
  canvas {
    display: none !important;
  }
}

/* Text-alternative rows for the 3-D view are buttons so keyboard users can select a body;
   they must still read as list rows, not as chunky form controls. */
#orreryPositions .sky-row {
  display: block;
  width: 100%;
  text-align: left;
  background: none;
  border: 0;
  font: inherit;
  color: inherit;
  cursor: pointer;
}
#orreryPositions .sky-row:hover,
#orreryPositions .sky-row:focus-visible { background: rgba(255, 255, 255, 0.06); }
#orreryPositions .orrery-pos-moon { padding-left: 1.1rem; opacity: 0.85; }