:root {
  color-scheme: dark;
  --text: #eef0f6;
  --secondary: #a2a8ba;
  --panel: rgba(28, 30, 42, 0.74);
  --line: rgba(255, 255, 255, 0.12);
  --control: rgba(255, 255, 255, 0.10);
  --control-hover: rgba(255, 255, 255, 0.17);
  --accent: #3d8bfd;
  --accent-soft: rgba(61, 139, 253, 0.22);
  --gap: 16px;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: #010103;
  color: var(--text);
  font: 15px/1.4 system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-text-size-adjust: 100%;
}

#view {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
  outline: none;
  cursor: grab;
}
#view:active { cursor: grabbing; }

/* Type */

h2, h3, p { margin: 0; }
h2 { font-size: 1.3rem; font-weight: 600; }
h2.compact { font-size: 1rem; }
h3, .eyebrow {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--secondary);
}
.caption, .note { font-size: 0.8rem; color: var(--secondary); }
.note span { display: block; }
.note span + span { margin-top: 0.6em; }
.numeric, .value, input[type="number"], .orbit-row, .worked { font-variant-numeric: tabular-nums; }

/* Panels */

.panel {
  position: fixed;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 18px;
  border-radius: 22px;
  background: var(--panel);
  border: 1px solid var(--line);
  -webkit-backdrop-filter: blur(22px) saturate(1.4);
  backdrop-filter: blur(22px) saturate(1.4);
  overflow-y: auto;
  scrollbar-width: none;
}
.panel::-webkit-scrollbar { display: none; }

#controls {
  top: calc(64px + env(safe-area-inset-top));
  right: calc(var(--gap) + env(safe-area-inset-right));
  width: 310px;
  max-width: calc(100vw - 2 * var(--gap));
  max-height: calc(100% - 64px - 84px - env(safe-area-inset-top));
}

#explorer {
  top: calc(var(--gap) + env(safe-area-inset-top));
  left: calc(var(--gap) + env(safe-area-inset-left));
  width: 350px;
  max-width: calc(100vw - 2 * var(--gap));
  max-height: calc(100% - 2 * var(--gap));
}

#tourCard {
  left: calc(var(--gap) + env(safe-area-inset-left));
  bottom: calc(var(--gap) + env(safe-area-inset-bottom));
  width: 460px;
  max-width: calc(100vw - 2 * var(--gap));
  max-height: calc(100% - 2 * var(--gap));
  gap: 12px;
}
.tour-body { max-height: 190px; min-height: 5.6em; overflow-y: auto; display: grid; gap: 0.7em; }

/* In a tall, narrow window the caption and explorer sit along the bottom. */
body.tall #tourCard,
body.tall #explorer {
  top: auto;
  left: var(--gap);
  right: var(--gap);
  bottom: calc(var(--gap) + env(safe-area-inset-bottom));
  width: auto;
}
body.tall #explorer { max-height: 50%; }
body.tall #tourCard { max-height: 62%; }

#controlsToggle {
  position: fixed;
  top: calc(var(--gap) + env(safe-area-inset-top));
  right: calc(var(--gap) + env(safe-area-inset-right));
}

#modeButtons {
  position: fixed;
  left: 0;
  right: 0;
  bottom: calc(20px + env(safe-area-inset-bottom));
  display: flex;
  justify-content: center;
  gap: 10px;
  pointer-events: none;
}
#modeButtons > * { pointer-events: auto; }

#error {
  position: fixed;
  inset: 0;
  margin: auto;
  width: fit-content;
  height: fit-content;
  max-width: 80vw;
  padding: 16px 20px;
  border-radius: 14px;
  background: var(--panel);
  border: 1px solid var(--line);
}

a.back { color: var(--accent); font-size: 0.82rem; font-weight: 600; text-decoration: none; }

/* Layout helpers */

section { display: grid; gap: 10px; padding-top: 14px; border-top: 1px solid var(--line); }
.stack { display: grid; gap: 7px; }
.row { display: flex; align-items: center; gap: 8px; }
label.row { justify-content: space-between; font-weight: 500; font-size: 0.92rem; }
.section-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 8px; }
.spacer { flex: 1; }
hr { width: 100%; margin: 0; border: 0; border-top: 1px solid var(--line); }

/* Controls */

button, select, input[type="number"] {
  font: inherit;
  color: inherit;
  border: 0;
  border-radius: 10px;
  background: var(--control);
}
button {
  padding: 7px 12px;
  text-align: left;
  cursor: pointer;
  white-space: nowrap;
}
button:hover:not(:disabled) { background: var(--control-hover); }
button:disabled { opacity: 0.4; cursor: default; }
button:focus-visible, select:focus-visible, input:focus-visible, textarea:focus-visible, a:focus-visible, #view:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
#view:focus-visible { outline-offset: -2px; }
button.prominent { background: var(--accent); color: white; font-weight: 600; }
button.prominent:hover:not(:disabled) { background: #5a9dff; }
button.small { font-size: 0.82rem; }
button.pill { border-radius: 999px; padding: 10px 18px; font-size: 1.02rem; box-shadow: 0 4px 18px rgba(0, 0, 0, 0.45); }
button.icon { min-width: 34px; height: 34px; padding: 0 8px; text-align: center; }
button.round { width: 44px; height: 44px; border-radius: 50%; font-size: 1.1rem; }
button.quiet { background: none; color: var(--secondary); }
button.quiet.active { color: var(--accent); }

select { padding: 6px 10px; }

.slider { display: grid; gap: 4px; }
.slider-head { display: flex; justify-content: space-between; gap: 8px; font-weight: 500; font-size: 0.92rem; }
.value { color: var(--secondary); }
input[type="range"] { width: 100%; margin: 0; accent-color: var(--accent); }
input[type="checkbox"] { width: 18px; height: 18px; accent-color: var(--accent); }

/* Tour card */

.try-it::before { content: "⚙ "; }
.invitation { display: grid; gap: 6px; justify-items: start; padding: 10px; border-radius: 12px; background: var(--accent-soft); font-size: 0.82rem; }
.tour-actions { margin-top: 2px; }
.spinner {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid var(--line);
  border-top-color: var(--text);
  animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .spinner { animation-duration: 4s; } }

/* Explorer */

.segmented { display: grid; grid-template-columns: 1fr 1fr; padding: 2px; border-radius: 10px; background: var(--control); }
.segmented button { background: none; text-align: center; border-radius: 8px; padding: 5px; font-size: 0.88rem; }
.segmented button.selected { background: rgba(255, 255, 255, 0.24); font-weight: 600; }

.value-row { display: grid; grid-template-columns: 40px 1fr 92px; align-items: center; gap: 8px; font-weight: 500; font-size: 0.92rem; }
.value-row input[type="number"] { width: 100%; padding: 4px 6px; text-align: right; font-size: 0.82rem; border: 1px solid var(--line); }
.value-row input:disabled { opacity: 0.5; }
.toggle { cursor: pointer; }

.verdict-title { font-weight: 600; font-size: 0.95rem; }
.orbit-table { display: grid; gap: 1px; }
.orbit-row {
  display: grid;
  grid-template-columns: 22px repeat(4, 1fr);
  gap: 4px;
  width: 100%;
  padding: 2px 4px;
  border-radius: 5px;
  background: none;
  text-align: right;
  font-size: 0.74rem;
}
.orbit-row.head { color: var(--secondary); }
.orbit-row.selected, .orbit-row.selected:hover { background: var(--accent-soft); }
.orbit-row span { overflow: hidden; text-overflow: ellipsis; }
.worked { display: flex; justify-content: space-between; gap: 8px; font-size: 0.78rem; }
.worked.strong { font-weight: 600; }

.site-tools .row { flex-wrap: wrap; }
.site-tools button { flex: 1; white-space: nowrap; }
.site-tools input { width: 100%; }
.bookmark-dialog { position: fixed; inset: 0; width: min(540px, calc(100vw - 32px)); max-height: 80dvh; margin: auto; }
.bookmark-dialog::backdrop { background: #000a; }
.bookmark-dialog a { flex: 1; }
.start-here { border: 1px solid var(--line); border-radius: 16px; padding: 18px; margin: 24px 0; }
.start-here a { color: var(--accent); }
#graphics-status { position: fixed; z-index: 20; inset: auto 16px 16px; max-width: 540px; margin: auto; padding: 16px; border-radius: 14px; background: #111827; color: white; box-shadow: 0 8px 32px #0008; }
#graphics-status p { margin: 0 0 12px; }
#graphics-status button, #graphics-status a { margin-right: 12px; }