:root {
  color-scheme: dark;
  --bg: #050708;
  --panel: #080d0e;
  --line: rgba(217, 247, 255, .28);
  --text: #d9f7ff;
  --muted: #78a4ac;
  --green: #39ff35;
  --cyan: #58e8ff;
  --mono: "Lucida Console", Monaco, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; overflow: hidden; background: var(--bg); color: var(--text); font-family: var(--mono); }
.viewer-shell { height: 100%; display: grid; grid-template-rows: 64px minmax(0, 1fr) 76px; background: var(--bg); }
header, .controls { position: relative; z-index: 3; display: flex; align-items: center; justify-content: space-between; padding: 0 28px; background: rgba(5, 7, 8, .94); backdrop-filter: blur(12px); }
header { border-bottom: 1px solid var(--line); }
.identity { color: var(--text); font-size: 14px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.hint, .view-label { color: var(--muted); font: 11px var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.hint { color: rgba(88, 232, 255, .72); }
.stage { position: relative; min-height: 0; overflow: hidden; background-color: #1f282b; background-image: linear-gradient(rgba(217, 247, 255, .025) 1px, transparent 1px), linear-gradient(90deg, rgba(217, 247, 255, .025) 1px, transparent 1px); background-size: 42px 42px; }
.stage:after { content: ""; position: absolute; left: 18%; right: 18%; bottom: 6%; height: 15%; background: radial-gradient(ellipse, rgba(0, 0, 0, .58), transparent 70%); filter: blur(12px); pointer-events: none; }
#glCanvas { position: absolute; inset: 0; z-index: 2; width: 100%; height: 100%; cursor: grab; }
#glCanvas:active { cursor: grabbing; }
.loading { position: absolute; inset: 0; z-index: 4; display: flex; align-items: center; justify-content: center; gap: 11px; color: var(--muted); background: var(--bg); font: 11px var(--mono); letter-spacing: .08em; text-transform: uppercase; transition: opacity .35s; }
.loading.ready { opacity: 0; pointer-events: none; }
.loading span { width: 7px; height: 7px; border-radius: 50%; background: var(--green); animation: pulse 1s infinite alternate; }
.view-label { position: absolute; left: 24px; bottom: 20px; z-index: 3; color: rgba(217, 247, 255, .62); }
.controls { border-top: 1px solid var(--line); }
.screen-readout { display: grid; grid-template-columns: auto auto; align-items: center; gap: 14px; }
.screen-readout span { color: var(--green); font: 12px var(--mono); }
.screen-readout strong { color: var(--text); font-size: 14px; letter-spacing: .04em; }
.transport { display: flex; align-items: center; gap: 8px; }
.transport button, .reset { height: 38px; border: 1px solid var(--line); border-radius: 4px; background: var(--panel); color: var(--text); font: 600 12px var(--mono); letter-spacing: .07em; cursor: pointer; transition: background-color .14s ease, border-color .14s ease, color .14s ease; }
.transport button:hover, .reset:hover { border-color: var(--green); background: #0d1516; color: var(--green); }
.transport button:focus-visible, .reset:focus-visible { outline: 2px solid var(--green); outline-offset: 2px; }
.transport button:first-child, .transport button:last-child { width: 40px; color: var(--cyan); font-size: 19px; }
.transport #playPause { min-width: 88px; padding: 0 16px; }
.reset { padding: 0 16px; color: var(--muted); }
.hardware-hit { position: absolute; z-index: 3; display: none; width: 54px; height: 54px; margin: -27px 0 0 -27px; padding: 0; border: 0; background: transparent; cursor: pointer; }
.hardware-hit:focus-visible { outline: 2px solid var(--green); outline-offset: 2px; border-radius: 4px; }
.touch-hit { width: 72px; height: 64px; margin: -32px 0 0 -36px; }
.touch-hit:before { content: ""; position: absolute; left: 50%; top: 50%; width: 20px; height: 20px; margin: -10px; border: 1px solid rgba(57, 255, 53, .78); border-radius: 50%; background: rgba(57, 255, 53, .08); animation: touch-cue 2.2s ease-in-out infinite; pointer-events: none; transition: opacity .35s; }
.touch-hit:after { content: "TAP"; position: absolute; left: 50%; top: calc(50% + 16px); transform: translateX(-50%); color: rgba(217, 247, 255, .72); font: 9px var(--mono); letter-spacing: .12em; pointer-events: none; transition: opacity .35s; }
.touch-hit.is-used:before { opacity: .28; animation: none; }
.touch-hit.is-used:after { opacity: 0; }
@keyframes pulse { to { opacity: .35; } }
@keyframes touch-cue { 50% { opacity: .55; border-color: rgba(57, 255, 53, .98); background: rgba(57, 255, 53, .14); } }
@media (prefers-reduced-motion: reduce) { .touch-hit:before { animation: none; } }
@media (max-width: 650px) {
  .viewer-shell { grid-template-rows: 56px minmax(0, 1fr) 116px; }
  header, .controls { padding-inline: 16px; }
  .hint { display: none; }
  .view-label { left: 14px; bottom: 14px; }
  .controls { display: grid; grid-template-columns: 1fr auto; gap: 10px; padding-block: 12px; }
  .transport { grid-column: 1 / 3; grid-row: 1; justify-content: center; }
  .screen-readout { grid-column: 1; grid-row: 2; }
  .reset { grid-column: 2; grid-row: 2; }
  .stage:after { left: 2%; right: 2%; }
}