/* Design tokens — see docs/DESIGN.md for the full blueprint/technical
   direction these values implement. */
:root {
  --bg: #0a1628;
  --surface-1: #0f1f38;
  --surface-2: #142a4a;
  --text: #e8f4ff;
  --text-muted: #7a93b8;
  --accent: #4dd8e8;
  --accent-support: #ff6b4a;
  --success: #5eebb0;
  --danger: #ff5252;

  --font-display: "Chakra Petch", "Segoe UI", sans-serif;
  --font-ui: "JetBrains Mono", "Courier New", monospace;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 40px;

  --radius: 2px;
  --glow: 0 0 24px rgba(77, 216, 232, 0.25);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
}

body {
  background-image: linear-gradient(rgba(77, 216, 232, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(77, 216, 232, 0.06) 1px, transparent 1px),
    radial-gradient(circle at 50% 20%, rgba(77, 216, 232, 0.08), transparent 60%);
  background-size: 32px 32px, 32px 32px, 100% 100%;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.masthead {
  padding: var(--space-4) var(--space-4) var(--space-2);
  text-align: center;
}

.wordmark {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.08em;
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  margin: 0;
  color: var(--text);
}

/* The "O" of AP-O-GEE is the planet; a satellite dot orbits it — the app's
   own mechanic, live in the wordmark. */
.wordmark-orbit-wrap {
  position: relative;
  display: inline-block;
}

.wordmark-planet {
  color: var(--accent);
  text-shadow: var(--glow);
}

.wordmark-orbit-dot {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 5px;
  height: 5px;
  margin: -2.5px 0 0 -2.5px;
  border-radius: 50%;
  background: var(--accent-support);
  box-shadow: 0 0 8px 1px rgba(255, 107, 74, 0.7);
  animation: wordmark-orbit 3.4s linear infinite;
}

@keyframes wordmark-orbit {
  from {
    transform: rotate(0deg) translateX(0.62em) rotate(0deg);
  }
  to {
    transform: rotate(360deg) translateX(0.62em) rotate(-360deg);
  }
}

.tagline {
  color: var(--text-muted);
  margin: var(--space-1) 0 0;
  font-size: 0.95rem;
}

.stage {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: 0 var(--space-4) var(--space-4);
}

.stage-canvas-wrap {
  position: relative;
  width: min(100%, 900px);
  height: 60vh;
  min-height: 360px;
}

.stage-canvas-wrap.is-shaking {
  animation: stage-shake 160ms var(--ease-out);
}

@keyframes stage-shake {
  0% {
    transform: translate(0, 0);
  }
  25% {
    transform: translate(-6px, 3px);
  }
  50% {
    transform: translate(5px, -4px);
  }
  75% {
    transform: translate(-3px, 2px);
  }
  100% {
    transform: translate(0, 0);
  }
}

#scene {
  width: 100%;
  height: 100%;
  display: block;
  background: var(--surface-1);
  border: 1px dashed rgba(77, 216, 232, 0.35);
  border-radius: var(--radius);
  box-shadow: var(--glow);
  touch-action: none;
  cursor: grab;
}

#scene:active {
  cursor: grabbing;
}

.outcome-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(10, 22, 40, 0.72);
  backdrop-filter: blur(2px);
  border-radius: var(--radius);
  animation: overlay-in 200ms var(--ease-out);
}

.outcome-overlay[hidden] {
  display: none;
}

@keyframes overlay-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.outcome-card {
  background: var(--surface-2);
  border: 1px dashed var(--accent);
  border-radius: var(--radius);
  box-shadow: var(--glow);
  padding: var(--space-4);
  min-width: 260px;
  text-align: center;
}

.outcome-title {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.12em;
  font-size: 1.5rem;
  margin: 0 0 var(--space-3);
  color: var(--accent);
}

.outcome-title[data-outcome="crash"] {
  color: var(--danger);
}

.outcome-title[data-outcome="orbit"] {
  color: var(--success);
}

.outcome-title[data-outcome="escape"] {
  color: var(--accent-support);
}

.outcome-stats {
  margin: 0 0 var(--space-4);
  font-size: 0.85rem;
  color: var(--text-muted);
  display: grid;
  grid-template-columns: auto auto;
  gap: var(--space-1) var(--space-3);
  justify-content: center;
}

.outcome-stats dt {
  text-align: right;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.outcome-stats dd {
  margin: 0;
  text-align: left;
  color: var(--text);
}

.hud-panel {
  width: min(100%, 900px);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.hud-grid {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: var(--space-2);
  background: var(--surface-1);
  border: 1px dashed rgba(77, 216, 232, 0.25);
  border-radius: var(--radius);
  padding: var(--space-2) var(--space-3);
}

.hud-item dt {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.hud-item dd {
  margin: 0;
  font-size: 0.95rem;
  color: var(--accent);
  font-weight: 600;
}

.hud-status {
  font-family: var(--font-ui);
  color: var(--success);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  min-height: 1.2em;
  margin: 0;
  text-align: center;
}

.hud-status[data-outcome="crash"] {
  color: var(--danger);
}

.hud-status[data-outcome="escape"] {
  color: var(--accent-support);
}

.controls {
  width: min(100%, 900px);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.control {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--text-muted);
  font-size: 0.8rem;
}

.control-label {
  white-space: nowrap;
}

.control-value {
  min-width: 3.5ch;
  color: var(--text);
}

.control-buttons {
  display: flex;
  gap: var(--space-2);
}

/* Themed range slider */
input[type="range"] {
  appearance: none;
  -webkit-appearance: none;
  width: 140px;
  height: var(--space-1);
  border-radius: var(--radius);
  background: var(--surface-2);
  outline: none;
  border: 1px solid rgba(77, 216, 232, 0.3);
}

input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: var(--glow);
  cursor: pointer;
  transition: transform 150ms var(--ease-out);
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

input[type="range"]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border: none;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: var(--glow);
  cursor: pointer;
}

input[type="range"]:focus-visible {
  box-shadow: 0 0 0 2px var(--bg), 0 0 0 4px var(--accent);
}

input[type="range"]:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn {
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  color: var(--text);
  background: var(--surface-2);
  border: 1px dashed rgba(77, 216, 232, 0.4);
  border-radius: var(--radius);
  padding: var(--space-2) var(--space-3);
  min-height: 44px;
  min-width: 44px;
  cursor: pointer;
  transition: background 160ms var(--ease-out), transform 120ms var(--ease-out), border-color 160ms var(--ease-out);
}

.btn:hover {
  background: rgba(77, 216, 232, 0.14);
  border-color: var(--accent);
}

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

.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px var(--bg), 0 0 0 4px var(--accent);
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
  border-style: solid;
  border-color: var(--accent);
}

.btn-primary:hover {
  background: #6de3f0;
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2);
}

.btn-icon svg {
  width: 20px;
  height: 20px;
  fill: var(--text);
}

.btn-icon[aria-pressed="true"] svg {
  fill: var(--text-muted);
}

.site-footer {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
  padding: var(--space-3);
  border-top: 1px dashed rgba(77, 216, 232, 0.2);
}

@media (max-width: 768px) {
  .stage-canvas-wrap {
    height: 50vh;
  }
}

@media (max-width: 480px) {
  .masthead {
    padding: var(--space-3) var(--space-3) var(--space-1);
  }

  .stage-canvas-wrap {
    height: 45vh;
    min-height: 300px;
  }

  .controls {
    justify-content: center;
  }

  input[type="range"] {
    width: 110px;
  }
}

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