:root {
  color-scheme: dark;
  --paper: #f5f1e8;
  --ink: #15191f;
  --panel: #090d14;
  --line: rgba(245, 241, 232, .18);
  --soft: rgba(245, 241, 232, .68);
  --red: #f05245;
  font-family: "Courier New", Courier, monospace;
}

* { box-sizing: border-box; }

html, body { min-height: 100%; }
html.is-embedded, html.is-embedded body { overflow: hidden; }

body {
  margin: 0;
  background: var(--ink);
  color: var(--paper);
}

button, a { min-height: 44px; }

.smoke-lab {
  width: min(100%, 980px);
  margin: 0 auto;
  padding: clamp(18px, 4vw, 42px) clamp(18px, 4vw, 42px) 12px;
}

.lab-header { margin-bottom: 20px; }

.eyebrow {
  color: var(--red);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .15em;
}

h1 {
  margin: 8px 0 4px;
  font-family: Arial, Helvetica, sans-serif;
  font-size: clamp(2.5rem, 8vw, 5rem);
  line-height: .9;
  letter-spacing: -.07em;
}

.lab-header p, .lab-footer p {
  max-width: 64ch;
  margin: 12px 0 0;
  color: var(--soft);
  font-size: clamp(.9rem, 2vw, 1rem);
  line-height: 1.55;
}

#play {
  position: absolute;
  z-index: 3;
  top: 50%;
  left: 50%;
  width: 128px;
  height: 128px;
  padding: 0;
  border: 1px solid rgba(210, 230, 255, .72);
  border-radius: 50%;
  background: radial-gradient(circle at 38% 32%, rgba(130, 217, 255, .3), rgba(8, 12, 20, .88) 58%);
  color: var(--paper);
  font: 700 .68rem/1 "Courier New", Courier, monospace;
  letter-spacing: .13em;
  text-transform: uppercase;
  cursor: pointer;
  transform: translate(-50%, -50%);
  box-shadow: 0 0 48px rgba(130, 217, 255, .2), inset 0 0 28px rgba(175, 117, 255, .14);
  transition: background-color 120ms ease, color 120ms ease, opacity 120ms ease, transform 120ms ease;
}

#play::before {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 150px;
  height: 42px;
  border: 1px solid rgba(210, 230, 255, .62);
  border-radius: 50%;
  content: "";
  transform: translate(-50%, -50%) rotate(-16deg);
}

#play::after {
  position: absolute;
  top: 23px;
  right: 5px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #fff7c2;
  box-shadow: 0 0 5px #fff, 0 0 16px #82d9ff;
  content: "";
}

#play:hover { background-color: rgba(130, 217, 255, .16); transform: translate(-50%, -50%) scale(1.06); }
#play:focus-visible { outline: 3px solid #82d9ff; outline-offset: 4px; }

.stage.is-playing #play {
  display: none;
}

.stage {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel);
}

#smoke {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  cursor: crosshair;
  touch-action: none;
}

.stage-note {
  position: absolute;
  right: 14px;
  bottom: 12px;
  left: 14px;
  display: flex;
  justify-content: space-between;
  gap: 14px;
  color: rgba(245, 241, 232, .62);
  font-size: .65rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  pointer-events: none;
}

.lab-footer {
  padding-top: 12px;
}

.music-player {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 16px;
  min-height: 58px;
  padding: 8px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.music-player button {
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--paper);
  font: 700 .68rem/1 "Courier New", Courier, monospace;
  text-transform: uppercase;
  cursor: pointer;
}

.music-player button:hover { border-color: #82d9ff; color: #82d9ff; }
.music-player button:focus-visible { outline: 3px solid #82d9ff; outline-offset: 3px; }

.track-buttons { display: flex; flex-wrap: wrap; gap: 6px; }
.track-buttons button { min-height: 36px; padding: 0 10px; color: var(--soft); font-size: .62rem; letter-spacing: .04em; }
.track-buttons button.is-active { border-color: #82d9ff; background: rgba(130, 217, 255, .1); color: #fff; }
.track-buttons button:disabled { border-color: var(--line); color: rgba(245, 241, 232, .32); cursor: wait; }

.volume-control { display: flex; align-items: center; gap: 12px; }
.volume-control label { display: flex; align-items: center; gap: 8px; }
.volume-control label span { color: var(--soft); font-size: .62rem; letter-spacing: .1em; text-transform: uppercase; }
.volume-control input { width: 110px; accent-color: #82d9ff; cursor: pointer; }
.volume-control input:focus-visible { outline: 3px solid #82d9ff; outline-offset: 3px; }

.lab-footer audio { display: none; }

@media (max-width: 620px) {
  .smoke-lab { padding: 18px; }
  .stage-note span:last-child { display: none; }
  .music-player { gap: 10px; }
  .volume-control { justify-content: space-between; grid-column: 1 / -1; }
  .volume-control input { width: min(42vw, 150px); }
}