/* Ember Glider — interface styling.
   Two colour schemes: the dark default suits the sunset, the light scheme
   keeps the same layout readable in a light environment. */

:root {
  --ink: #f6ece0;
  --ink-dim: #c8b6a4;
  --panel: rgba(24, 17, 22, 0.58);
  --panel-edge: rgba(255, 198, 140, 0.22);
  --accent: #ffab5e;
  --accent-strong: #ffd08a;
  --warn: #ff8a6a;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
  --radius: 12px;
  --ui-font: "Avenir Next", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: light) {
  :root {
    --ink: #2b1c14;
    --ink-dim: #6b5445;
    --panel: rgba(255, 247, 238, 0.82);
    --panel-edge: rgba(120, 66, 30, 0.25);
    --accent: #b8461b;
    --accent-strong: #8f3410;
    --warn: #a83214;
    --shadow: 0 10px 26px rgba(74, 40, 18, 0.22);
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow: hidden;
  background: #120d14;
  color: var(--ink);
  font-family: var(--ui-font);
  -webkit-font-smoothing: antialiased;
}

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

#stage:active { cursor: grabbing; }

.fallback {
  position: fixed;
  inset: 0;
  display: grid;
  place-content: center;
  text-align: center;
  padding: 2rem;
  color: #f6ece0;
}

/* ----------------------------------------------------------------- HUD */

.hud {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 5;
  font-variant-numeric: tabular-nums;
}

.hud[hidden] { display: none; }

.hud-topbar {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--panel-edge);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 10px 12px;
  min-width: 168px;
  backdrop-filter: blur(6px);
}

.panel .row {
  display: flex;
  align-items: baseline;
  gap: 8px;
  line-height: 1.5;
  white-space: nowrap;
}

.label {
  font-size: 11px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ink-dim);
  min-width: 58px;
}

.value {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
}

.panel-right .row .value { margin-left: auto; }
.panel-right { text-align: right; }
.panel-right .label { min-width: 0; }

.sub {
  font-size: 11px;
  color: var(--ink-dim);
}

.speed-bar {
  margin-top: 6px;
  height: 5px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.16);
  overflow: hidden;
}

.speed-fill {
  height: 100%;
  width: 40%;
  background: linear-gradient(90deg, var(--accent), var(--accent-strong));
  transition: width 120ms linear;
}

/* compass ribbon */

.compass {
  position: relative;
  flex: 0 1 380px;
  max-width: 46vw;
  background: var(--panel);
  border: 1px solid var(--panel-edge);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 8px 10px 6px;
  backdrop-filter: blur(6px);
  display: none;
}

@media (min-width: 720px) {
  .compass { display: block; }
}

.compass-strip {
  position: relative;
  height: 24px;
  overflow: hidden;
  border-bottom: 1px solid var(--panel-edge);
}

.tick {
  position: absolute;
  top: 2px;
  transform: translateX(-50%);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ink-dim);
}

.tick::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -9px;
  width: 1px;
  height: 6px;
  background: var(--panel-edge);
}

.compass-ring {
  position: absolute;
  top: 0;
  width: 2px;
  height: 24px;
  margin-left: -1px;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}

.compass-ring::after {
  content: "";
  position: absolute;
  left: -4px;
  top: -4px;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 6px solid var(--accent);
}

.compass-caption {
  margin-top: 6px;
  text-align: center;
  font-size: 11px;
  color: var(--ink-dim);
}

/* altitude tape */

.alt-tape {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 84px;
  height: min(52vh, 400px);
  background: var(--panel);
  border: 1px solid var(--panel-edge);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  backdrop-filter: blur(6px);
}

.alt-scale {
  position: absolute;
  inset: 0;
  background-repeat: repeat-y;
  background-size: 100% 25%;
  background-image: linear-gradient(to bottom, var(--panel-edge) 0 1px, transparent 1px 100%);
  opacity: 0.5;
}

.alt-marker {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  transform: translateY(50%);
  display: flex;
  align-items: center;
  gap: 4px;
  padding-left: 8px;
  transition: bottom 90ms linear;
}

.alt-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--accent);
  opacity: 0.75;
}

.alt-readout {
  position: relative;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-strong);
  background: var(--panel);
  padding: 1px 5px;
  border-radius: 6px;
}

.alt-caption {
  position: absolute;
  bottom: 4px;
  left: 0;
  right: 0;
  text-align: center;
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

/* notes */

.hud-notes {
  position: absolute;
  bottom: 22px;
  left: 0;
  right: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 0 16px;
}

.note {
  min-height: 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-strong);
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.65);
  background: var(--panel);
  border: 1px solid var(--panel-edge);
  border-radius: 999px;
  padding: 4px 14px;
  backdrop-filter: blur(6px);
}

.note:empty { display: none; }

.note-warn {
  color: var(--warn);
  font-size: 16px;
  letter-spacing: 0.08em;
}

@media (prefers-color-scheme: light) {
  .note { color: #6d2a0c; }
  .note-warn { color: #8f2008; }
}

/* off-screen ring marker */

.ring-marker {
  position: absolute;
  width: 44px;
  height: 44px;
  margin: -22px 0 0 -22px;
  display: grid;
  place-items: center;
}

.ring-marker[hidden] { display: none; }

.ring-arrow {
  width: 0;
  height: 0;
  border-left: 11px solid transparent;
  border-right: 11px solid transparent;
  border-bottom: 20px solid var(--accent);
  filter: drop-shadow(0 0 6px rgba(255, 160, 80, 0.85));
}

@media (prefers-color-scheme: light) {
  .ring-arrow { filter: drop-shadow(0 0 5px rgba(150, 60, 20, 0.55)); }
}

/* crash notice */

.crash-note {
  position: absolute;
  top: 38%;
  left: 0;
  right: 0;
  text-align: center;
  font-size: 34px;
  font-weight: 700;
  color: var(--warn);
  text-shadow: 0 3px 18px rgba(0, 0, 0, 0.7);
}

.crash-note[hidden] { display: none; }

/* ------------------------------------------------------------- screens */

.screen {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: grid;
  place-items: center;
  padding: 20px;
  overflow: auto;
  background: radial-gradient(120% 90% at 50% 10%, rgba(30, 16, 20, 0.45), rgba(12, 8, 12, 0.86));
}

.screen[hidden] { display: none; }

@media (prefers-color-scheme: light) {
  .screen {
    background: radial-gradient(120% 90% at 50% 10%, rgba(255, 240, 226, 0.55), rgba(60, 34, 22, 0.72));
  }
}

.card {
  width: min(660px, 100%);
  background: var(--panel);
  border: 1px solid var(--panel-edge);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 26px 28px 22px;
  backdrop-filter: blur(10px);
  text-align: center;
}

.card h1 {
  margin: 0 0 8px;
  font-size: clamp(28px, 5vw, 42px);
  letter-spacing: 0.02em;
  color: var(--accent-strong);
}

.card h2 {
  margin: 0 0 8px;
  font-size: clamp(22px, 4vw, 30px);
  color: var(--accent-strong);
}

.goal {
  margin: 0 auto 20px;
  max-width: 46ch;
  font-size: clamp(15px, 2.1vw, 18px);
  line-height: 1.5;
  color: var(--ink);
}

.stats-strip {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin: 0 0 20px;
}

.stat {
  flex: 1 1 120px;
  min-width: 104px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid var(--panel-edge);
  border-radius: 10px;
  padding: 9px 10px;
}

@media (prefers-color-scheme: light) {
  .stat { background: rgba(120, 66, 30, 0.07); }
}

.stat-label {
  display: block;
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

.stat-value {
  display: block;
  margin-top: 3px;
  font-size: 18px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
}

.controls {
  display: grid;
  gap: 7px;
  margin: 0 auto 20px;
  max-width: 460px;
  text-align: left;
}

.control {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13.5px;
  color: var(--ink-dim);
  flex-wrap: wrap;
}

.control span { font-size: 12px; }

.ctrl-text { color: var(--ink); }

kbd {
  display: inline-block;
  min-width: 24px;
  padding: 2px 6px;
  border-radius: 6px;
  border: 1px solid var(--panel-edge);
  background: rgba(255, 255, 255, 0.1);
  font: inherit;
  font-size: 12px;
  font-weight: 600;
  color: var(--ink);
  text-align: center;
}

@media (prefers-color-scheme: light) {
  kbd { background: rgba(120, 66, 30, 0.09); }
}

.actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

button {
  font: inherit;
  font-size: 15px;
  font-weight: 600;
  padding: 10px 22px;
  border-radius: 10px;
  border: 1px solid var(--panel-edge);
  background: rgba(255, 255, 255, 0.1);
  color: var(--ink);
  cursor: pointer;
  transition: transform 120ms ease, background 120ms ease;
}

button:hover { background: rgba(255, 255, 255, 0.18); }
button:active { transform: translateY(1px); }

button:focus-visible,
a:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #2a1409;
}

button.primary:hover { background: var(--accent-strong); }

@media (prefers-color-scheme: light) {
  button { background: rgba(120, 66, 30, 0.08); }
  button:hover { background: rgba(120, 66, 30, 0.16); }
  button.primary { background: var(--accent); color: #fff6ee; }
  button.primary:hover { background: var(--accent-strong); }
}

.hint {
  margin: 18px 0 0;
  font-size: 13px;
  color: var(--ink-dim);
}

.hint.small { margin-top: 8px; font-size: 12px; }

/* ---------------------------------------------------- reduced motion */

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

@media (max-width: 560px) {
  .alt-tape { width: 66px; height: 40vh; }
  .panel { min-width: 0; }
  .hud-topbar { padding: 10px; gap: 8px; }
}