:root {
  --bg: #05060f;
  --panel: rgba(14, 18, 40, 0.62);
  --panel-border: rgba(140, 170, 255, 0.18);
  --text: #e8ecff;
  --muted: #8f9bc7;
  --accent: #5fd6ff;
  --accent-2: #b45cff;
  --display: 'Orbitron', system-ui, sans-serif;
  --ui: 'Rajdhani', system-ui, sans-serif;
  /* Set by main.js from the projected well position. */
  --well-left: 40vw;
  --well-right: 60vw;
  --well-top: 5vh;
  --well-bottom: 95vh;
  --well-cx: 50vw;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: var(--ui);
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior: none;
}

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

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
}

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

#hud {
  pointer-events: none;
}

.panel {
  position: fixed;
  top: var(--well-top);
  width: 160px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.panel-left { right: calc(100% - var(--well-left) + 28px); }
.panel-right { left: calc(var(--well-right) + 28px); }

.box {
  pointer-events: auto;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  padding: 10px 12px 12px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.box h2 {
  margin: 0 0 6px;
  font: 800 12px/1 var(--display);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

#hold-canvas { width: 100%; height: 84px; display: block; }
#next-canvas { width: 100%; height: 300px; display: block; }
.hold-box { cursor: pointer; }

.stats { display: grid; gap: 8px; }
.stat { display: flex; flex-direction: column; }
.stat span {
  font: 600 11px/1 var(--display);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}
.stat b {
  font: 800 22px/1.25 var(--display);
  color: var(--text);
  font-variant-numeric: tabular-nums;
}
.stat.best b { font-size: 15px; color: var(--muted); }

.sys-buttons { display: flex; gap: 8px; margin-top: 4px; }
.icon-btn {
  width: 40px;
  height: 36px;
  border-radius: 10px;
  border: 1px solid var(--panel-border);
  background: rgba(255, 255, 255, 0.06);
  display: grid;
  place-items: center;
  padding: 0;
}
.icon-btn:hover { background: rgba(255, 255, 255, 0.12); }
.icon-btn svg { width: 20px; height: 20px; fill: var(--text); stroke: var(--text); }
.icon-btn .wave, .icon-btn .cross { fill: none; stroke-width: 2; stroke-linecap: round; }
.icon-btn .cross { display: none; }
#mute-btn.off .wave { display: none; }
#mute-btn.off .cross { display: inline; }
#mute-btn.off { opacity: 0.7; }

/* Narrow screens: one bar above the well. */
body.compact #hud {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  gap: 8px;
  padding: calc(env(safe-area-inset-top, 0px) + 8px) 10px 0;
}
body.compact .panel {
  position: static;
  width: auto;
  flex-direction: row;
  gap: 8px;
}
body.compact .panel-left { flex: 1; min-width: 0; }
body.compact .box { padding: 6px 8px; border-radius: 10px; }
body.compact .box h2 { font-size: 9px; margin-bottom: 3px; }
body.compact .hold-box { width: 66px; flex: none; }
body.compact #hold-canvas { height: 44px; }
body.compact #next-canvas { width: 128px; height: 44px; }
body.compact .stats {
  flex: 1;
  min-width: 0;
  grid-template-columns: repeat(3, auto) 1fr;
  align-items: center;
  column-gap: 10px;
  row-gap: 2px;
}
body.compact .stat span { font-size: 8px; }
body.compact .stat b { font-size: 15px; }
body.compact .stat.best { display: none; }
body.compact .sys-buttons { margin: 0; justify-self: end; gap: 6px; }
body.compact .icon-btn { width: 34px; height: 32px; }

/* ---------- Score popups ---------- */

#popups {
  position: fixed;
  left: var(--well-cx);
  top: calc(var(--well-top) * 0.65 + var(--well-bottom) * 0.35);
  width: 0;
  height: 0;
  pointer-events: none;
  z-index: 5;
}
.popup {
  position: absolute;
  left: 0;
  top: 0;
  transform: translate(-50%, -50%);
  text-align: center;
  white-space: nowrap;
  animation: popup 1.3s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.6);
}
.popup .title {
  font: 900 26px/1.1 var(--display);
  background: linear-gradient(90deg, #7fe7ff, #d08bff, #ffd36b);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: none;
  filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.6));
}
.popup .sub { font: 700 15px/1.3 var(--display); color: #ffd36b; letter-spacing: 0.08em; }
.popup .points { font: 800 20px/1.3 var(--display); color: #fff; }
.popup .level { font: 900 64px/1 var(--display); color: #fff; }
.popup.big .title { font-size: 34px; }
.popup.levelup { top: -130px; animation-duration: 1.6s; }
@keyframes popup {
  0% { opacity: 0; transform: translate(-50%, -30%) scale(0.6); }
  15% { opacity: 1; transform: translate(-50%, -50%) scale(1.08); }
  25% { transform: translate(-50%, -50%) scale(1); }
  75% { opacity: 1; }
  100% { opacity: 0; transform: translate(-50%, -110%) scale(0.96); }
}

/* ---------- Touch controls ---------- */

#touch-controls {
  display: none;
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  justify-content: space-between;
  padding: 0 12px calc(env(safe-area-inset-bottom, 0px) + 12px);
  pointer-events: none;
  z-index: 3;
}
body.touch #touch-controls { display: flex; }
#touch-controls .cluster { display: flex; gap: 8px; pointer-events: auto; }
#touch-controls button {
  --size: clamp(48px, 14vw, 66px);
  width: var(--size);
  height: var(--size);
  border-radius: 50%;
  border: 1px solid var(--panel-border);
  background: var(--panel);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: grid;
  place-items: center;
  padding: 0;
  touch-action: none;
  transition: transform 0.06s, background 0.06s;
}
#touch-controls button.accent { background: rgba(95, 214, 255, 0.22); }
#touch-controls button.pressed { transform: scale(0.92); background: rgba(255, 255, 255, 0.2); }
#touch-controls svg {
  width: 46%;
  height: 46%;
  fill: none;
  stroke: var(--text);
  stroke-width: 2.4;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ---------- Overlays ---------- */

.overlay {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 16px;
  background: radial-gradient(ellipse at center, rgba(5, 6, 15, 0.45), rgba(5, 6, 15, 0.82));
  z-index: 10;
  animation: fade-in 0.35s ease;
}
.overlay[hidden] { display: none; }
@keyframes fade-in { from { opacity: 0; } }

.card {
  width: min(420px, 100%);
  max-height: calc(100vh - 32px);
  overflow: auto;
  padding: 28px 24px;
  border-radius: 20px;
  background: rgba(14, 18, 40, 0.78);
  border: 1px solid var(--panel-border);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.5);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}
.card h1 {
  margin: 0;
  font: 900 34px/1.1 var(--display);
  letter-spacing: 0.06em;
}
.logo {
  font-size: clamp(40px, 12vw, 58px) !important;
  background: linear-gradient(180deg, #ffffff 10%, #7fe7ff 55%, #b45cff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 4px 18px rgba(95, 214, 255, 0.35));
}
.logo span {
  font-size: 0.42em;
  vertical-align: super;
  margin-left: 0.15em;
  background: linear-gradient(180deg, #ffd36b, #ff8a3d);
  -webkit-background-clip: text;
  background-clip: text;
}
.best-line { margin: 0; color: var(--muted); font-size: 18px; }
.best-line b { color: var(--text); font-family: var(--display); }

.card button {
  min-width: 200px;
  padding: 12px 22px;
  border-radius: 999px;
  border: 1px solid var(--panel-border);
  background: rgba(255, 255, 255, 0.06);
  font: 800 16px/1 var(--display);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.card button:hover { background: rgba(255, 255, 255, 0.12); }
.card button.primary {
  border: none;
  background: linear-gradient(135deg, #36c8ff, #8b5cff);
  box-shadow: 0 8px 26px rgba(95, 140, 255, 0.45);
}
.card button.primary:hover { filter: brightness(1.1); }
.card button:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.help {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 16px;
}
kbd {
  display: inline-block;
  min-width: 26px;
  padding: 2px 6px;
  border-radius: 6px;
  border: 1px solid var(--panel-border);
  background: rgba(255, 255, 255, 0.07);
  color: var(--text);
  font: 600 13px/1.3 var(--ui);
}
.touch-help { display: none; }
body.touch .touch-help { display: grid; }
body.touch .keys { display: none; }

.results {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 26px;
  margin: 4px 0 6px;
}
.results div { display: flex; flex-direction: column; }
.results span {
  font: 600 11px/1 var(--display);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}
.results b { font: 800 24px/1.3 var(--display); }
.new-best {
  margin: 0;
  font: 800 16px/1 var(--display);
  color: #ffd36b;
  letter-spacing: 0.1em;
  animation: pulse 1s ease-in-out infinite alternate;
}
@keyframes pulse { to { opacity: 0.55; transform: scale(1.05); } }

@media (prefers-reduced-motion: reduce) {
  .popup, .new-best { animation-duration: 0.01s; }
}