/* ---- Tokens ------------------------------------------------------------ */

:root {
  --ink: #f6e6d6;
  --ink-dim: #b79c92;
  --orange: #ff8a3d;
  --amber: #ffb14e;
  --purple: #b066ff;
  --brown: #2a1720;
  --void: #0d0710;

  --font: "Rajdhani", "Segoe UI Variable", "Segoe UI", system-ui, sans-serif;
  --mono: ui-monospace, "Cascadia Mono", "SF Mono", Menlo, monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  background: var(--void);
  color: var(--ink);
  font-family: var(--font);
  overflow: hidden;
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
}

#stage {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.input-surface {
  position: fixed;
  inset: 0;
  touch-action: none;
}

kbd {
  font-family: var(--mono);
  font-size: 0.8em;
  border: 1px solid rgba(255, 177, 78, 0.35);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 0.05em 0.4em;
  margin: 0 0.1em;
  color: var(--amber);
}

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

.hud {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: clamp(0.9rem, 2.5vw, 2rem);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.8s ease 0.2s;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

body.is-playing .hud {
  opacity: 1;
}

.hud-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.hud-brand {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.hud-brand-mark {
  font-size: clamp(1.2rem, 2.4vw, 1.7rem);
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--orange);
  text-shadow: 0 0 18px rgba(255, 138, 61, 0.5);
}

.hud-brand-song {
  font-size: 0.7rem;
  color: var(--ink-dim);
  letter-spacing: 0.34em;
  margin-top: 0.35rem;
}

.hud-scoreblock {
  text-align: right;
  line-height: 1;
}

.hud-score {
  font-size: clamp(1.8rem, 5vw, 3.2rem);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
  text-shadow: 0 0 24px rgba(255, 138, 61, 0.35);
}

.hud-meta {
  display: flex;
  gap: 0.9rem;
  justify-content: flex-end;
  margin-top: 0.4rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--amber);
}

.hud-combo {
  margin-top: 0.35rem;
  font-size: 0.78rem;
  color: var(--purple);
  min-height: 1em;
}

.hud-centre {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.8rem;
  text-align: center;
}

.hud-popup {
  font-size: clamp(1.1rem, 3.4vw, 2rem);
  font-weight: 700;
  letter-spacing: 0.14em;
  opacity: 0;
  color: var(--amber);
}

.hud-popup.is-visible {
  animation: popup 0.7s ease-out forwards;
}

.hud-popup[data-kind="crash"] {
  color: #ff4a63;
}

.hud-popup[data-kind="turn"] {
  color: var(--purple);
}

@keyframes popup {
  0% {
    opacity: 0;
    transform: translateY(12px) scale(0.94);
  }
  18% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  100% {
    opacity: 0;
    transform: translateY(-14px) scale(1.02);
  }
}

.hud-junction {
  font-size: 0.74rem;
  letter-spacing: 0.28em;
  color: var(--purple);
  border: 1px solid rgba(176, 102, 255, 0.35);
  border-radius: 999px;
  padding: 0.35rem 1rem;
  background: rgba(20, 8, 24, 0.45);
  opacity: 0;
  transform: translateY(-6px);
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.hud-junction.is-visible {
  opacity: 1;
  transform: none;
  animation: junction-pulse 1.1s ease-in-out infinite;
}

@keyframes junction-pulse {
  50% {
    border-color: rgba(255, 177, 78, 0.7);
    color: var(--amber);
  }
}

.hud-bottom {
  align-items: flex-end;
}

.hud-lanes {
  display: flex;
  gap: 0.4rem;
}

.lane-pip {
  width: 26px;
  height: 4px;
  border-radius: 2px;
  background: rgba(176, 102, 255, 0.25);
  transition: background 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}

.lane-pip.is-active {
  background: var(--orange);
  box-shadow: 0 0 14px rgba(255, 138, 61, 0.8);
  transform: scaleY(1.6);
}

.hud-transport {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  pointer-events: auto;
}

.hud-time {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--ink-dim);
  font-variant-numeric: tabular-nums;
}

.hud-progress {
  width: clamp(90px, 26vw, 260px);
  height: 2px;
  background: rgba(246, 230, 214, 0.18);
  overflow: hidden;
}

.hud-progress-fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--purple), var(--orange));
  transform: scaleX(0);
  transform-origin: left center;
}

.hud-button {
  background: rgba(20, 8, 24, 0.5);
  border: 1px solid rgba(255, 177, 78, 0.3);
  color: var(--amber);
  border-radius: 6px;
  font-size: 0.8rem;
  line-height: 1;
  padding: 0.35rem 0.5rem;
  cursor: pointer;
}

.hud-button:hover {
  border-color: var(--amber);
  color: var(--ink);
}

.hud-flag {
  position: absolute;
  bottom: clamp(0.9rem, 2.5vw, 2rem);
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.68rem;
  letter-spacing: 0.3em;
  color: var(--ink-dim);
}

.diag {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  margin: 0;
  padding: 0.6rem 1rem;
  background: #4a0d1c;
  border-bottom: 1px solid #ff4a63;
  color: #ffd9d9;
  font-family: var(--mono);
  font-size: 0.74rem;
  text-align: center;
}

/* ---- Screens ----------------------------------------------------------- */

.screen {
  position: fixed;
  inset: 0;
  z-index: 5;
  display: grid;
  place-items: center;
  padding: 2rem 1.25rem;
  background: radial-gradient(circle at 50% 45%, rgba(42, 15, 30, 0.55), rgba(8, 4, 10, 0.9) 70%);
  backdrop-filter: blur(3px);
  overflow-y: auto;
}

.screen[hidden] {
  display: none;
}

.screen-inner {
  width: min(46rem, 100%);
  text-align: center;
}

.eyebrow {
  margin: 0 0 0.6rem;
  font-size: 0.7rem;
  letter-spacing: 0.42em;
  text-transform: uppercase;
  color: var(--purple);
}

.title {
  margin: 0;
  font-size: clamp(4rem, 18vw, 10rem);
  font-weight: 700;
  line-height: 0.85;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-shadow: 0 0 60px rgba(255, 138, 61, 0.45), 0 0 140px rgba(176, 102, 255, 0.3);
}

.title-dot {
  color: var(--orange);
}

.title-sm {
  margin: 0 0 0.6rem;
  font-size: clamp(1.6rem, 5vw, 2.4rem);
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.subtitle {
  margin: 0.4rem 0 1.6rem;
  font-size: 0.8rem;
  letter-spacing: 0.5em;
  text-transform: uppercase;
  color: var(--amber);
}

.blurb {
  margin: 0 auto 1.4rem;
  max-width: 34rem;
  color: var(--ink-dim);
  font-size: clamp(0.95rem, 2vw, 1.05rem);
  line-height: 1.7;
}

.song-meta,
.loading {
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  color: var(--amber);
  min-height: 1.2em;
  margin: 0 0 1rem;
}

.loading {
  color: var(--ink-dim);
}

.cta {
  appearance: none;
  border: 1px solid var(--orange);
  background: linear-gradient(180deg, rgba(255, 138, 61, 0.22), rgba(255, 138, 61, 0.05));
  color: var(--ink);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  padding: 0.85rem 2.4rem;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.25s ease, background 0.25s ease;
  box-shadow: 0 0 30px rgba(255, 138, 61, 0.25);
}

.cta:hover,
.cta:focus-visible {
  transform: translateY(-1px);
  background: linear-gradient(180deg, rgba(255, 138, 61, 0.35), rgba(255, 138, 61, 0.12));
  box-shadow: 0 0 46px rgba(255, 138, 61, 0.45);
}

.controls {
  list-style: none;
  margin: 1.8rem 0 1.2rem;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  font-size: 0.8rem;
  color: var(--ink-dim);
}

.links {
  display: flex;
  gap: 1.4rem;
  justify-content: center;
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.links a {
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
}

.links a:hover,
.links a:focus-visible {
  color: var(--ink);
  border-bottom-color: var(--orange);
}

.end-grade {
  font-size: clamp(5rem, 20vw, 11rem);
  font-weight: 700;
  line-height: 0.9;
  color: var(--orange);
  text-shadow: 0 0 70px rgba(255, 138, 61, 0.5);
}

.end-score {
  font-family: var(--mono);
  font-size: clamp(1.4rem, 5vw, 2.4rem);
  font-variant-numeric: tabular-nums;
  margin-bottom: 1.4rem;
}

.end-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(8rem, 1fr));
  gap: 0.6rem 1.4rem;
  margin: 0 auto 1.8rem;
  max-width: 34rem;
  text-align: left;
}

.end-stats .stat {
  display: flex;
  justify-content: space-between;
  gap: 0.6rem;
  border-bottom: 1px solid rgba(246, 230, 214, 0.12);
  padding-bottom: 0.35rem;
  font-size: 0.82rem;
}

.end-stats dt {
  color: var(--ink-dim);
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

.end-stats dd {
  margin: 0;
  font-family: var(--mono);
  color: var(--amber);
}

/* ---- Text page --------------------------------------------------------- */

.page {
  position: relative;
  z-index: 1;
  max-width: 40rem;
  margin: 0 auto;
  padding: 6rem 1.5rem;
  color: var(--ink-dim);
  line-height: 1.75;
  /* Only reachable by anchor or crawler; the canvas owns the viewport. */
  display: none;
}

body:not(.is-playing) .page:target,
.page:target {
  display: block;
}

.page h2 {
  color: var(--ink);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 1rem;
}

/* ---- Motion preferences ------------------------------------------------ */

@media (prefers-reduced-motion: reduce) {
  .hud-junction.is-visible,
  .hud-popup.is-visible {
    animation: none;
    opacity: 1;
  }

  .cta {
    transition: none;
  }
}