:root {
  --bg: #05070f;
  --ink: #e8f0ff;
  --dim: #7f8bab;
  --accent: #2bd6c4;
  --panel: rgba(15, 20, 36, 0.82);
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  margin: 0;
}

body {
  background:
    radial-gradient(1100px 700px at 22% -10%, #142046 0%, transparent 60%),
    radial-gradient(900px 600px at 90% 110%, #2a0f3a 0%, transparent 62%),
    var(--bg);
  color: var(--ink);
  font-family: "SF Mono", ui-monospace, "Cascadia Mono", Menlo, monospace;
  display: grid;
  place-items: center;
  overflow: hidden;
  touch-action: manipulation;
}

.wrap {
  display: flex;
  gap: 22px;
  align-items: stretch;
  padding: 16px;
  max-width: 1000px;
}

.stage {
  position: relative;
}

canvas {
  display: block;
  height: min(88vh, 760px);
  width: auto;
  border-radius: 18px;
  background: rgba(4, 7, 16, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.07);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.55);
  cursor: pointer;
}

/* ---- side panel ---- */

.side {
  width: 232px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.side header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.side h2 {
  margin: 0;
  font-size: 20px;
  letter-spacing: 3px;
  color: var(--accent);
}

.side h2 span {
  color: var(--ink);
}

button {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.16);
  color: var(--dim);
  border-radius: 8px;
  padding: 4px 9px;
  font: inherit;
  font-size: 11px;
  cursor: pointer;
}

button:hover {
  color: var(--ink);
  border-color: var(--accent);
}

.row {
  display: flex;
  gap: 12px;
}

.row > .stat {
  flex: 1;
}

.stat {
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 12px;
  padding: 9px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.label {
  font-size: 10px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--dim);
}

.value {
  font-size: 20px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.big-stat .value {
  font-size: 34px;
  color: var(--accent);
}

.meter {
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 12px;
  padding: 9px 12px;
}

.meter-head {
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--dim);
  margin-bottom: 7px;
}

.meter-head .ready {
  color: #ffe14d;
}

#meter-label.ready {
  color: #ffe14d;
  animation: blink 0.8s steps(2) infinite;
}

@keyframes blink {
  50% {
    opacity: 0.35;
  }
}

.meter-track {
  height: 9px;
  border-radius: 99px;
  background: rgba(255, 255, 255, 0.09);
  overflow: hidden;
}

#meter-fill {
  height: 100%;
  width: 0%;
  border-radius: 99px;
  background: linear-gradient(90deg, #2bd6c4, #ffe14d);
  transition: width 0.25s ease;
}

.chips {
  display: flex;
  gap: 6px;
}

.chip {
  --c: var(--accent);
  min-width: 34px;
  height: 34px;
  padding: 0 6px;
  display: grid;
  place-items: center;
  border-radius: 9px;
  font-size: 13px;
  font-weight: 700;
  color: var(--c);
  border: 1px solid color-mix(in srgb, var(--c) 55%, transparent);
  background: color-mix(in srgb, var(--c) 12%, transparent);
}

.keys {
  list-style: none;
  margin: auto 0 0;
  padding: 0;
  font-size: 11px;
  color: var(--dim);
  line-height: 2;
}

kbd {
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 5px;
  padding: 1px 5px;
  margin-right: 3px;
  font: inherit;
  font-size: 10px;
  color: var(--ink);
}

/* ---- overlay ---- */

.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(4, 6, 14, 0.78);
  backdrop-filter: blur(6px);
  border-radius: 18px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease;
}

.overlay.visible {
  opacity: 1;
  pointer-events: auto;
}

.panel {
  width: min(88%, 400px);
  text-align: center;
  padding: 26px 24px;
}

.panel h1 {
  margin: 0 0 14px;
  font-size: 28px;
  letter-spacing: 5px;
  color: var(--accent);
}

.panel p {
  margin: 0 0 12px;
  font-size: 13px;
  line-height: 1.65;
  color: #c7d2ea;
}

.panel .big {
  font-size: 46px;
  font-weight: 700;
  color: #ffe14d;
  margin: 4px 0 6px;
}

.panel .hint {
  color: var(--dim);
  font-size: 11px;
}

@media (max-width: 860px) {
  body {
    overflow: auto;
    align-items: start;
  }

  .wrap {
    flex-direction: column;
    align-items: center;
    gap: 14px;
  }

  canvas {
    height: auto;
    width: min(94vw, 420px);
  }

  .side {
    width: min(94vw, 420px);
  }

  .keys {
    display: none;
  }
}