:root {
  color-scheme: dark;

  /* Theme primitives (default: dark) */
  --page-bg: radial-gradient(1200px 800px at 50% 35%, #07101d 0%, #02040a 55%, #000 100%);
  --scene-bg-0: #07101d;
  --scene-bg-1: #02040a;
  --scene-bg-2: #000;

  --ui-surface: rgba(0, 0, 0, 0.38);
  --ui-border: rgba(255, 255, 255, 0.12);
  --ui-text: rgba(255, 255, 255, 0.82);
  --ui-text-strong: rgba(255, 255, 255, 0.9);
  --ui-text-muted: rgba(255, 255, 255, 0.68);
  --ui-text-subtle: rgba(255, 255, 255, 0.6);

  --ui-hover-bg: rgba(255, 255, 255, 0.06);
  --ui-hover-border: rgba(255, 255, 255, 0.12);
  --ui-active-border: rgba(255, 255, 255, 0.16);

  --ui-control-bg: rgba(255, 255, 255, 0.06);
  --ui-control-border: rgba(255, 255, 255, 0.16);
}

/* Light theme overrides */
:root[data-theme='light'] {
  color-scheme: light;

  /* Daytime: brighter sky-like background, clearer surfaces */
  --page-bg: radial-gradient(1200px 800px at 50% 30%, #fbfdff 0%, #eef6ff 52%, #e3edf9 100%);
  --scene-bg-0: #fbfdff;
  --scene-bg-1: #eef6ff;
  --scene-bg-2: #e3edf9;

  --ui-surface: rgba(255, 255, 255, 0.86);
  --ui-border: rgba(12, 28, 54, 0.14);
  --ui-text: rgba(10, 16, 26, 0.82);
  --ui-text-strong: rgba(10, 16, 26, 0.92);
  --ui-text-muted: rgba(10, 16, 26, 0.66);
  --ui-text-subtle: rgba(10, 16, 26, 0.56);

  --ui-hover-bg: rgba(12, 28, 54, 0.06);
  --ui-hover-border: rgba(12, 28, 54, 0.14);
  --ui-active-border: rgba(12, 28, 54, 0.2);

  --ui-control-bg: rgba(255, 255, 255, 0.8);
  --ui-control-border: rgba(12, 28, 54, 0.18);
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  overflow: hidden;
  background: var(--page-bg);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji",
    "Segoe UI Emoji";
}

/* Accessibility: visible keyboard focus (uses existing theme tokens) */
:where(a, button, input, select, textarea):focus-visible {
  outline: 2px solid var(--ui-active-border);
  outline-offset: 2px;
}

:where(a, button, input, select, textarea):focus {
  outline: none;
}

#scene {
  display: block;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
}

/* Shared nav */
.nav {
  position: fixed;
  left: 18px;
  top: 58px;
  z-index: 20;
  display: inline-flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 8px;
  border-radius: 12px;
  background: var(--ui-surface);
  background-color: var(--ui-surface);
  border: 1px solid var(--ui-border);
  backdrop-filter: blur(16px) saturate(1.15);
  -webkit-backdrop-filter: blur(16px) saturate(1.15);
  max-width: min(520px, calc(100vw - 36px));
}

@media (max-width: 600px) {
  /* Reduce occlusion on small screens */
  .nav {
    left: 12px;
    top: 12px;
    padding: 6px;
    gap: 6px;
    max-width: calc(100vw - 24px);
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .nav__link {
    padding: 6px 9px;
    font-size: 11px;
    white-space: nowrap;
  }
}

.nav__link {
  display: inline-block;
  padding: 7px 10px;
  border-radius: 10px;
  font-size: 12px;
  text-decoration: none;
  color: var(--ui-text-muted);
  border: 1px solid rgba(255, 255, 255, 0);
}

.nav__btn {
  appearance: none;
  background: transparent;
  font: inherit;
  cursor: pointer;
}

.nav__link:hover {
  color: var(--ui-text-strong);
  border-color: var(--ui-hover-border);
  background: var(--ui-hover-bg);
}

.nav__link--active {
  color: var(--ui-text-strong);
  border-color: var(--ui-active-border);
  background: var(--ui-hover-bg);
}

/* Shared corner panel pattern (used by both .controls and .card-ui__panel) */
.controls,
.card-ui__panel {
  position: fixed;
  top: 18px;
  right: 18px;
  width: min(320px, calc(100vw - 36px));
  padding: 12px 12px 10px;
  border-radius: 12px;
  background: var(--ui-surface);
  border: 1px solid var(--ui-border);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--ui-text);
  pointer-events: auto;
  max-height: calc(100vh - 36px);
  max-height: calc(100dvh - 36px);
  overflow: auto;
  z-index: 30;
}

.controls__header,
.card-ui__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}

.controls__title,
.card-ui__title {
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 650;
  margin-bottom: 0;
  color: color-mix(in srgb, var(--ui-text) 92%, transparent);
}

.controls__toggle,
.card-ui__toggle {
  appearance: none;
  border: 1px solid var(--ui-control-border);
  background: var(--ui-control-bg);
  color: color-mix(in srgb, var(--ui-text) 92%, transparent);
  padding: 6px 10px;
  border-radius: 10px;
  font-size: 12px;
}

.controls__toggle:active,
.card-ui__toggle:active {
  transform: translateY(1px);
}

/* Index page controls layout */
.controls__row {
  display: grid;
  grid-template-columns: 88px 1fr 42px;
  align-items: center;
  gap: 10px;
  padding: 5px 0;
}

.controls__row > * {
  min-width: 0;
}

.controls__row--toggle {
  grid-template-columns: 1fr auto;
}

.controls__label {
  font-size: 12px;
  color: var(--ui-text-muted);
}

.controls__val {
  font-size: 12px;
  text-align: right;
  color: var(--ui-text-subtle);
}

.controls input[type='range'] {
  width: 100%;
}

.controls input[type='checkbox'] {
  width: 18px;
  height: 18px;
  justify-self: end;
}

.controls__btn {
  margin-top: 8px;
  width: 100%;
  appearance: none;
  border: 1px solid var(--ui-control-border);
  background: var(--ui-control-bg);
  color: var(--ui-text);
  padding: 8px 10px;
  border-radius: 10px;
  font-size: 12px;
}

.controls__btn--mini {
  margin-top: 0;
  width: auto;
  padding: 6px 10px;
}

.controls__btnpair {
  display: inline-flex;
  gap: 8px;
  justify-content: flex-start;
  align-items: center;
  flex-wrap: wrap;
}

.controls__btn:active {
  transform: translateY(1px);
}

/* Collapse behavior */
.controls.is-collapsed,
.card-ui__panel.is-collapsed {
  overflow: visible;
  width: auto;
  max-height: none;
  padding: 0;
  border-radius: 0;
  /* When collapsed, hide the container chrome (border/background).
     Keep only the toggle button visible for a cleaner look. */
  background: transparent;
  border-color: transparent;
  box-shadow: none;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

.controls.is-collapsed .controls__row,
.controls.is-collapsed .controls__btn {
  display: none;
}

.card-ui__panel.is-collapsed .card-ui__row,
.card-ui__panel.is-collapsed .card-ui__btn,
.card-ui__panel.is-collapsed .card-ui__status {
  display: none;
}

.controls.is-collapsed .controls__title,
.card-ui__panel.is-collapsed .card-ui__title {
  display: none;
}

.controls.is-collapsed .controls__toggle,
.card-ui__panel.is-collapsed .card-ui__toggle {
  padding: 10px 12px;
}

/* Inputs shared */
.controls__select,
.card-ui__input,
.card-ui__select,
.card-ui__textarea {
  width: 100%;
  max-width: 100%;
  min-width: 0;
  border-radius: 12px;
  border: 1px solid var(--ui-control-border);
  background: var(--ui-control-bg);
  color: color-mix(in srgb, var(--ui-text) 96%, transparent);
  outline: none;
}

.card-ui__input,
.card-ui__select,
.card-ui__textarea {
  padding: 10px 10px;
}

/* Card page: show custom message box only in custom mode */
#card-custom-wrap {
  display: none;
}

.card-ui__panel.is-custom #card-custom-wrap {
  display: grid;
}

.card-ui__val {
  font-size: 12px;
  color: var(--ui-text-subtle);
}

.card-ui__row {
  display: grid;
  gap: 6px;
  padding: 6px 0;
}

.card-ui__row--toggle {
  grid-auto-flow: column;
  grid-template-columns: 1fr auto;
  align-items: center;
}

.card-ui__label {
  font-size: 12px;
  color: var(--ui-text-muted);
}

.card-ui__btn {
  margin-top: 10px;
  width: 100%;
  appearance: none;
  border: 1px solid var(--ui-control-border);
  background: var(--ui-control-bg);
  color: var(--ui-text);
  padding: 10px 10px;
  border-radius: 12px;
  font-size: 13px;
}

.card-ui__btn:active {
  transform: translateY(1px);
}

.card-ui__status {
  margin-top: 8px;
  font-size: 12px;
  color: var(--ui-text-subtle);
  min-height: 16px;
}

.ui__mono-big {
  font-size: 14px;
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
}

.ui__pre {
  white-space: pre-line;
  line-height: 1.35;
}

/* Countdown page */
.page-countdown .cd-panel-time-row {
  display: none;
}

.controls__select {
  padding: 6px 8px;
  border-radius: 10px;
}

/* Fix select option colors for better contrast in both themes */
.controls__select option,
.card-ui__select option {
  background: var(--ui-control-bg);
  color: var(--ui-text);
}

/* Dark mode: ensure options have dark background with light text */
:root[data-theme='dark'] .controls__select option,
:root[data-theme='dark'] .card-ui__select option {
  background-color: #1a1a1a;
  color: rgba(255, 255, 255, 0.9);
}

/* Light mode: ensure options have light background with dark text */
:root[data-theme='light'] .controls__select option,
:root[data-theme='light'] .card-ui__select option {
  background-color: #ffffff;
  color: rgba(10, 16, 26, 0.9);
}

@media (max-width: 600px) {
  .nav {
    left: 16px;
    top: 16px;
  }

  .controls,
  .card-ui__panel {
    top: auto;
    right: 16px;
    bottom: 16px;
    left: auto;
    width: min(320px, calc(100vw - 32px));
    max-height: min(56vh, calc(100vh - 32px));
  }
}

/* Respect the hidden attribute even on elements with an explicit display. */
[hidden] {
  display: none !important;
}