:root {
  color-scheme: dark;
  --bg: #0b1719;
  --panel: #102023;
  --line: rgba(201, 232, 217, .11);
  --text: #e4eee6;
  --dim: #91aaa1;
  --mint: #a4e0c2;
  --gold: #e8c998;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(ellipse at 50% 6%, #193333 0, var(--bg) 52rem);
  color: var(--text);
  font-family: "DM Sans", "PingFang SC", sans-serif;
}
button, input { font: inherit; }
button { color: inherit; cursor: pointer; }
.handpan-app { max-width: 820px; margin: 0 auto; padding: 26px 28px 44px; }
.topbar { display: flex; justify-content: space-between; align-items: center; color: var(--dim); font: 10px "DM Mono", monospace; letter-spacing: .12em; }
.back-link { color: var(--dim); text-decoration: none; letter-spacing: 0; font: 12px "DM Sans", sans-serif; }
.back-link:hover { color: var(--mint); }
.pack-mark { color: #a6c4b4; }
.top-actions { display: flex; align-items: center; gap: 14px; }
.guide-link { color: var(--mint); text-decoration: none; font: 11px "DM Sans", sans-serif; letter-spacing: 0; white-space: nowrap; }
.guide-link:hover { color: var(--gold); }
button.locale { padding: 5px 8px; border: 1px solid var(--line); border-radius: 7px; background: rgba(19, 42, 41, .8); color: var(--dim); font: 10px "DM Sans", sans-serif; letter-spacing: 0; }
.intro { text-align: center; padding: 54px 0 30px; }
.eyebrow { margin: 0 0 10px; color: var(--mint); font: 10px "DM Mono", monospace; letter-spacing: .2em; }
h1 { margin: 0; font: 500 clamp(42px, 8vw, 64px)/1.1 "Noto Serif SC", serif; letter-spacing: .04em; }
h1 span { color: var(--gold); font: 400 .58em "DM Sans", sans-serif; letter-spacing: .06em; }
.intro h1 span:first-child { color: var(--text); font: inherit; letter-spacing: inherit; }
.lede { margin: 14px 0 0; color: var(--dim); font: 14px "Noto Serif SC", serif; letter-spacing: .08em; }
.sound-stage { position: relative; height: 420px; overflow: hidden; border: 1px solid var(--line); border-radius: 22px; background: linear-gradient(145deg, rgba(28, 59, 55, .78), rgba(9, 20, 23, .95)); box-shadow: 0 24px 75px rgba(0, 0, 0, .2); }
.stage-glow { position: absolute; width: 390px; height: 390px; left: 50%; top: 50%; transform: translate(-50%, -50%); border-radius: 50%; background: rgba(138, 218, 177, .07); filter: blur(54px); pointer-events: none; }
#viz { position: relative; display: block; width: 100%; height: 100%; }
.stage-caption { position: absolute; left: 22px; right: 22px; bottom: 17px; display: flex; justify-content: space-between; color: #c3d4c9; font-size: 11px; pointer-events: none; }
#scaleName { font-family: "DM Mono", monospace; color: var(--gold); }
#pieceStats { color: var(--dim); }
.seed { position: absolute; top: 17px; right: 20px; color: rgba(212, 232, 219, .45); font: 9px "DM Mono", monospace; letter-spacing: .16em; }
.transport { display: flex; justify-content: center; align-items: center; gap: 12px; padding: 23px 0 34px; }
.transport button, .export-button { border: 1px solid var(--line); border-radius: 999px; background: rgba(19, 42, 41, .8); transition: .2s ease; }
.transport button:hover, .export-button:hover { border-color: rgba(164, 224, 194, .55); background: #183533; }
.play-button { width: 46px; height: 46px; color: #10211d; background: var(--mint) !important; border-color: var(--mint) !important; font-size: 16px; }
.play-button:hover { filter: brightness(1.08); }
.random-button { min-width: 170px; padding: 13px 22px; color: #12231d; background: var(--gold) !important; border-color: var(--gold) !important; font-weight: 700; }
.random-button:hover { filter: brightness(1.06); }
.random-button span { margin-right: 5px; }
.endless-button { min-width: 112px; padding: 12px 16px; color: var(--dim); font-size: 11px; }
.endless-button.active { border-color: var(--mint); background: rgba(40, 87, 72, .82); color: var(--mint); }
.controls { padding: 24px 30px 28px; border: 1px solid var(--line); border-radius: 18px; background: rgba(14, 31, 32, .7); }
.slider-control { display: block; margin-top: 23px; }
.slider-control:first-child { margin-top: 0; }
.slider-title, .slider-ends { display: flex; justify-content: space-between; align-items: center; }
.slider-title { font-size: 12px; }
.slider-title b { font-weight: 500; }
.slider-title output { color: var(--mint); font: 10px "DM Mono", monospace; }
input[type="range"] { width: 100%; height: 3px; margin: 13px 0 8px; accent-color: var(--mint); cursor: pointer; }
.slider-ends { color: #7d9990; font-size: 10px; }
footer { display: flex; flex-direction: column; align-items: center; gap: 10px; padding: 23px 0 0; }
.export-button { padding: 9px 19px; color: var(--dim); font-size: 11px; }
#hint { min-height: 16px; margin: 0; color: var(--dim); text-align: center; font-size: 11px; }
.disclaimer { margin: 0; color: rgba(145, 170, 161, .58); text-align: center; font-size: 10px; }
@media (max-width: 600px) {
  .handpan-app { padding: 18px 16px 32px; }
  .pack-mark { display: none; }
  .top-actions { gap: 10px; }
  .guide-link { font-size: 10px; }
  .intro { padding: 42px 0 24px; }
  .lede { font-size: 12px; }
  .sound-stage { height: 350px; border-radius: 16px; }
  .controls { padding: 21px 19px 24px; }
  .transport { gap: 8px; flex-wrap: wrap; }
  .random-button { min-width: 142px; padding-inline: 14px; }
  .endless-button { min-width: 100px; padding-inline: 12px; }
}