:root {
  --u: 3px;            /* one art pixel, in CSS px; set from script */
  --bg: #15162a;
  --bez-hi: #676880;
  --bez: #46475e;
  --bez-lo: #2b2c40;
  --ink: #a6a9cb;
  --sh: 0.6;           /* shadow strength under the dial */
  --rim: 0.16;         /* how bright the bezel's top edge is */
}

* { box-sizing: border-box; }

html, body { height: 100%; margin: 0; }
html { background: var(--bg); }

body {
  background: var(--bg);
  color: var(--ink);
  overflow: hidden;
  overscroll-behavior: none;
  -webkit-tap-highlight-color: transparent;
  -webkit-text-size-adjust: 100%;
  font-family: ui-rounded, "SF Pro Rounded", "Hiragino Maru Gothic ProN", "Arial Rounded MT Bold", system-ui, sans-serif;
}

.stage {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

.rig {
  display: grid;
  justify-items: center;
  gap: calc(var(--u) * 8);
  padding-bottom: 3vh;
}

/* The bezel: a porcelain ring by day, graphite by night. */
.dial {
  position: relative;
  padding: calc(var(--u) * 7);
  border-radius: 999px;
  background: linear-gradient(180deg, var(--bez-hi) 0%, var(--bez) 46%, var(--bez-lo) 100%);
  box-shadow:
    inset 0 calc(var(--u) * 0.4) 0 rgb(255 255 255 / var(--rim)),
    inset 0 calc(var(--u) * -0.4) 0 rgb(10 10 30 / 0.1),
    0 calc(var(--u) * 14) calc(var(--u) * 22) calc(var(--u) * -8) rgb(18 18 44 / var(--sh)),
    0 calc(var(--u) * 4) calc(var(--u) * 7) calc(var(--u) * -2) rgb(18 18 44 / calc(var(--sh) * 0.6));
  cursor: grab;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
  outline: none;
}
.dial.held { cursor: grabbing; }
/* The ring shows for keyboard use only; script decides (see main.js). */
.kbd .dial:focus {
  outline: max(2px, calc(var(--u) * 0.7)) solid var(--ink);
  outline-offset: calc(var(--u) * 2.4);
}

/* The well the room sits in. */
.well {
  position: relative;
  width: calc(var(--u) * 224);
  height: calc(var(--u) * 64);
  border-radius: 999px;
  overflow: hidden;
  background: #0c0c18;
  box-shadow:
    0 calc(var(--u) * 0.45) 0 rgb(255 255 255 / calc(var(--rim) * 0.9)),
    0 calc(var(--u) * -0.45) 0 rgb(10 10 30 / 0.22);
}
.view {
  display: block;
  width: 100%;
  height: 100%;
}
.well::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  box-shadow:
    inset 0 calc(var(--u) * 1.1) calc(var(--u) * 2.2) rgb(8 8 28 / 0.42),
    inset 0 0 0 calc(var(--u) * 0.3) rgb(8 8 28 / 0.5),
    inset 0 calc(var(--u) * -0.7) calc(var(--u) * 1.4) rgb(255 255 255 / 0.1);
}

.hint {
  margin: 0;
  font-size: clamp(13px, calc(var(--u) * 4.6), 17px);
  letter-spacing: 0.01em;
  opacity: 0;
  transition: opacity 0.7s ease;
}
.ready .hint { opacity: 0.9; transition-delay: 1.5s; }
.ready .hint.gone { opacity: 0; transition-delay: 0s; }

.sound {
  position: fixed;
  right: max(14px, env(safe-area-inset-right));
  bottom: max(14px, env(safe-area-inset-bottom));
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  opacity: 0.8;
}
.sound:hover { opacity: 1; background: color-mix(in srgb, var(--ink) 12%, transparent); }
.sound:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; opacity: 1; }
.sound svg { width: 22px; height: 22px; fill: currentColor; shape-rendering: crispEdges; }
.sound[aria-pressed="true"] .off,
.sound[aria-pressed="false"] .on { display: none; }

noscript p { margin: 0; padding: 24px; text-align: center; }

@media (prefers-reduced-motion: reduce) {
  .hint { transition: none; }
}