/* ------------------------------------------------------------------ theme */
:root {
  --ink: #0b0512;
  --night-1: #241041;
  --night-2: #120720;
  --blade: #ff3cdc;
  --blade-soft: #ff9df1;
  --sun: #ff4d5e;
  --paper: #f6ecff;
  --muted: #b39bd6;
  --glass: rgba(38, 18, 64, 0.55);
  --stroke: rgba(255, 156, 240, 0.28);
  --font: "Trebuchet MS", "Segoe UI", system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font);
  -webkit-tap-highlight-color: transparent;
}

body {
  display: grid;
  place-items: center;
}

/* ------------------------------------------------------------------ stage */
.stage {
  position: relative;
  width: min(100vw, 1080px);
  height: 100dvh;
  max-height: 100dvh;
  overflow: hidden;
  background: radial-gradient(120% 90% at 50% 8%, var(--night-1), var(--night-2) 60%, #08030f 100%);
  isolation: isolate;
}

#board {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
  cursor: crosshair;
  user-select: none;
}

.stage.is-idle #board {
  cursor: pointer;
}

/* -------------------------------------------------------------------- hud */
.hud {
  position: absolute;
  inset: 0 0 auto 0;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: start;
  gap: 8px;
  padding: 14px 18px;
  pointer-events: none;
  z-index: 3;
}

.hud__block {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 8px 14px;
  border-radius: 14px;
  background: var(--glass);
  border: 1px solid var(--stroke);
  backdrop-filter: blur(6px);
  min-width: 92px;
}

.hud__block--center {
  align-items: center;
}

.hud__block--end {
  align-items: flex-end;
  justify-self: end;
}

.hud__label {
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.hud__value {
  font-size: 24px;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
  text-shadow: 0 0 14px rgba(255, 60, 220, 0.5);
}

.hud__lives {
  font-size: 18px;
  letter-spacing: 2px;
  color: var(--sun);
  text-shadow: 0 0 14px rgba(255, 77, 94, 0.65);
}

/* ------------------------------------------------------------------ combo */
.combo {
  position: absolute;
  top: 104px;
  left: 50%;
  transform: translate(-50%, -8px) scale(0.8);
  font-size: 30px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--blade-soft);
  text-shadow: 0 0 18px rgba(255, 60, 220, 0.85);
  opacity: 0;
  pointer-events: none;
  transition: opacity 140ms ease, transform 140ms ease;
  z-index: 3;
}

.combo.is-on {
  opacity: 1;
  transform: translate(-50%, 0) scale(1);
}

/* ------------------------------------------------------------------- mute */
.mute {
  position: absolute;
  right: 16px;
  bottom: 16px;
  z-index: 4;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  font-size: 18px;
  color: var(--paper);
  background: var(--glass);
  border: 1px solid var(--stroke);
  backdrop-filter: blur(6px);
  cursor: pointer;
  transition: transform 120ms ease, border-color 120ms ease;
}

.mute:hover {
  transform: scale(1.06);
  border-color: var(--blade);
}

.mute:focus-visible {
  outline: 2px solid var(--blade);
  outline-offset: 2px;
}

/* ---------------------------------------------------------------- overlay */
.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 20px;
  background: radial-gradient(80% 60% at 50% 45%, rgba(20, 6, 36, 0.72), rgba(6, 2, 12, 0.92));
  backdrop-filter: blur(3px);
  z-index: 5;
  transition: opacity 220ms ease, visibility 220ms ease;
}

.overlay[hidden] {
  display: grid;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.panel {
  width: min(460px, 100%);
  max-height: 100%;
  overflow-y: auto;
  padding: 26px 24px 22px;
  border-radius: 22px;
  text-align: center;
  background: linear-gradient(180deg, rgba(58, 26, 96, 0.72), rgba(20, 8, 36, 0.86));
  border: 1px solid var(--stroke);
  box-shadow: 0 26px 70px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.kicker {
  margin: 0 0 6px;
  font-size: 11px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--blade-soft);
}

.title {
  margin: 0;
  font-size: clamp(34px, 9vw, 46px);
  line-height: 1;
  letter-spacing: 0.02em;
  background: linear-gradient(180deg, #fff, var(--blade-soft) 55%, var(--blade));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 0 18px rgba(255, 60, 220, 0.45));
}

.tagline {
  margin: 10px 0 18px;
  font-size: 14px;
  color: var(--muted);
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin: 0 0 14px;
}

.stats[hidden] {
  display: none;
}

.stat {
  padding: 10px 6px;
  border-radius: 14px;
  background: rgba(10, 3, 20, 0.5);
  border: 1px solid var(--stroke);
}

.stat span {
  display: block;
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.stat strong {
  font-size: 22px;
  font-variant-numeric: tabular-nums;
}

.badge {
  margin: 0 0 12px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: #ffd76a;
  text-shadow: 0 0 16px rgba(255, 215, 106, 0.7);
}

.badge[hidden] {
  display: none;
}

.rules {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  text-align: left;
  font-size: 13px;
  color: var(--muted);
}

.rules[hidden] {
  display: none;
}

.rules li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 0;
  border-bottom: 1px dashed rgba(255, 156, 240, 0.14);
}

.rules li:last-child {
  border-bottom: 0;
}

.rules li span {
  width: 24px;
  font-size: 17px;
  text-align: center;
}

.rules b {
  color: var(--paper);
}

.btn {
  width: 100%;
  padding: 14px 20px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-family: inherit;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #25032a;
  background: linear-gradient(180deg, var(--blade-soft), var(--blade));
  box-shadow: 0 12px 30px rgba(255, 60, 220, 0.35);
  cursor: pointer;
  transition: transform 120ms ease, box-shadow 120ms ease;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 36px rgba(255, 60, 220, 0.5);
}

.btn:active {
  transform: translateY(1px) scale(0.99);
}

.btn:focus-visible {
  outline: 2px solid var(--paper);
  outline-offset: 3px;
}

.hint {
  margin: 14px 0 0;
  font-size: 12px;
  color: var(--muted);
}

kbd {
  padding: 1px 6px;
  border-radius: 6px;
  font-family: inherit;
  font-size: 11px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--stroke);
}

/* ----------------------------------------------------------- small screens */
@media (max-width: 560px) {
  .hud {
    padding: 10px;
  }

  .hud__block {
    padding: 6px 10px;
    min-width: 74px;
  }

  .hud__value {
    font-size: 19px;
  }

  .hud__lives {
    font-size: 15px;
  }

  .combo {
    top: 86px;
    font-size: 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .overlay,
  .combo,
  .btn,
  .mute {
    transition: none;
  }
}