:root{
  --bg:#0a2f28;
  --bg-deep:#072520;
  --card:#0e3b33;
  --card-hi:#134a40;
  --ink:#ffffff;
  --ink-2:rgba(255,255,255,.76);
  --ink-3:rgba(255,255,255,.52);
  --ink-4:rgba(255,255,255,.26);
  --line:rgba(255,255,255,.16);
  --accent:#ef6b40;
  --accent-hi:#ff7d52;
  --accent-soft:rgba(239,107,64,.30);
  --accent-faint:rgba(239,107,64,.14);
  --sans:-apple-system,BlinkMacSystemFont,"Helvetica Neue","Segoe UI",sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,monospace;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*{box-sizing:border-box;margin:0;padding:0}
[hidden]{display:none!important}
html,body{height:100%}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:var(--sans);
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  overflow:hidden;
  overscroll-behavior:none;
  -webkit-tap-highlight-color:transparent;
}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}

body::after{
  content:"";position:fixed;inset:0;pointer-events:none;
  background:
    radial-gradient(80% 50% at 12% 0%,rgba(239,107,64,.10),transparent 60%),
    radial-gradient(70% 45% at 95% 100%,rgba(96,214,180,.09),transparent 60%);
}

.frame{
  position:relative;z-index:1;height:100%;
  max-width:620px;margin:0 auto;
  padding:max(20px,env(safe-area-inset-top)) 22px max(22px,env(safe-area-inset-bottom));
  display:flex;flex-direction:column;gap:18px;
}

/* ── logo ─────────────────────────────────────── */
.head{flex:none;display:flex;align-items:center;justify-content:center}
.logo{width:min(212px,58vw);color:var(--ink);line-height:0}
.logo svg{width:100%;height:auto;display:block}
.logo .tittle{fill:var(--accent)}

/* ── stage ────────────────────────────────────── */
.stage{flex:1 1 auto;min-height:170px;display:flex}
.card{
  position:relative;flex:1;border-radius:22px;overflow:hidden;
  background:linear-gradient(160deg,var(--card-hi),var(--card) 42%,var(--bg-deep));
  border:1px solid rgba(255,255,255,.07);
  display:flex;align-items:center;justify-content:center;
}
#canvas{position:absolute;inset:0;width:100%;height:100%;display:block;
  transition:opacity .45s var(--ease)}
.card.busy #canvas{opacity:.16}
.overlay{position:relative;text-align:center;padding:0 24px;animation:fade .6s var(--ease)}
.lede{font-size:16px;line-height:1.7;font-weight:400;color:var(--ink-2);max-width:24em}
.lede.dim{color:var(--ink-3);font-size:14.5px}

.loading{font-size:13px;letter-spacing:.18em;color:var(--ink);
  animation:breathe 1.9s ease-in-out infinite}
.progress{width:168px;height:2px;border-radius:2px;margin:18px auto 0;
  background:rgba(255,255,255,.16);position:relative;overflow:hidden}
.progress i{position:absolute;inset:0 auto 0 0;width:0;border-radius:2px;
  background:var(--accent);transition:width .16s linear}

/* ── harmony choice ───────────────────────────── */
.panel{flex:none;animation:rise .5s var(--ease)}
.rowlabel{
  display:flex;justify-content:space-between;align-items:baseline;
  font-size:11px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--ink-3);padding:0 4px 10px;
}
.rowlabel span:last-child{font-family:var(--mono);letter-spacing:.04em;text-transform:none;
  color:var(--ink-4)}

.choices{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.choice{
  border:1.5px solid var(--line);border-radius:14px;
  padding:13px 15px;text-align:left;transition:.28s var(--ease);
  background:rgba(255,255,255,.03);
}
.choice:hover{border-color:rgba(255,255,255,.34);background:rgba(255,255,255,.06)}
.choice .name{display:block;font-size:16px;font-weight:500;color:var(--ink);letter-spacing:.01em}
.choice .ivs{display:block;margin-top:3px;font-family:var(--mono);font-size:11px;
  color:var(--ink-3);letter-spacing:.05em}
.choice .fit{display:block;margin-top:10px;height:2px;border-radius:2px;
  background:rgba(255,255,255,.14);position:relative}
.choice .fit i{position:absolute;inset:0 auto 0 0;border-radius:2px;
  background:var(--ink-4);transition:.4s var(--ease)}
.choice.sel{border-color:var(--accent);background:var(--accent-faint)}
.choice.sel .ivs{color:rgba(255,255,255,.72)}
.choice.sel .fit i{background:var(--accent)}

/* ── harmony sound switch ─────────────────────── */
.soundrow{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:15px}
.sublabel{font-size:11px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--ink-3);white-space:nowrap;padding-left:4px}
.seg{display:flex;padding:3px;border-radius:100px;
  background:rgba(0,0,0,.26);border:1px solid var(--line)}
.segbtn{padding:8px 15px;border-radius:100px;font-size:13px;font-weight:500;
  color:var(--ink-3);white-space:nowrap;transition:.25s var(--ease)}
.segbtn:hover{color:var(--ink-2)}
.segbtn.sel{background:var(--accent);color:#fff;box-shadow:0 2px 12px rgba(239,107,64,.3)}

/* ── filter chips ─────────────────────────────── */
.chips{display:flex;gap:9px;padding-top:14px;flex-wrap:wrap}
.chip{
  flex:1 1 auto;min-width:96px;
  padding:11px 14px;border-radius:100px;
  border:1.5px solid var(--line);
  font-size:13.5px;font-weight:500;letter-spacing:.01em;
  color:var(--ink-3);transition:.26s var(--ease);
}
.chip:hover{color:var(--ink-2);border-color:rgba(255,255,255,.34)}
.chip.on{
  background:var(--accent);border-color:var(--accent);color:#fff;
  box-shadow:0 4px 18px rgba(239,107,64,.28);
}
.chip.on:hover{background:var(--accent-hi);border-color:var(--accent-hi)}

/* ── foot ─────────────────────────────────────── */
.foot{flex:none}

.transport{display:flex;flex-direction:column;align-items:center;gap:18px;
  animation:rise .5s var(--ease)}
.play{
  width:70px;height:70px;border-radius:50%;background:#fff;
  display:grid;place-items:center;
  box-shadow:0 8px 26px rgba(0,0,0,.32);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.play:hover{transform:scale(1.05);box-shadow:0 10px 32px rgba(0,0,0,.42)}
.play:active{transform:scale(.97)}
.play svg{width:30px;height:30px;fill:var(--bg-deep)}
.play .ic-play{transform:translateX(1px)}
.play .ic-stop{display:none}
.play.playing .ic-play{display:none}
.play.playing .ic-stop{display:block;fill:var(--accent)}

.actions{display:flex;gap:11px;width:100%}
.btn{
  flex:1;display:flex;align-items:center;justify-content:center;gap:8px;
  padding:15px 16px;border-radius:100px;
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:.26s var(--ease);white-space:nowrap;
}
.btn.ghost{background:var(--bg-deep);color:var(--ink-2);border:1.5px solid var(--line)}
.btn.ghost:hover{color:var(--ink);border-color:rgba(255,255,255,.36);background:#06201b}
.btn.primary{background:var(--accent);color:#fff;box-shadow:0 6px 22px rgba(239,107,64,.3)}
.btn.primary:hover{background:var(--accent-hi);box-shadow:0 8px 28px rgba(239,107,64,.42)}
.btn.primary:disabled{opacity:.62;cursor:default;box-shadow:none}
.ic-dl{width:19px;height:19px;fill:none;stroke:currentColor;stroke-width:1.7;
  stroke-linecap:round;stroke-linejoin:round;flex:none}

.recorder{display:flex;flex-direction:column;align-items:center;gap:15px}
.rec{position:relative;width:98px;height:98px;border-radius:50%;display:grid;place-items:center}
.rec-ring{position:absolute;inset:0;width:100%;height:100%;fill:none;transform:rotate(-90deg)}
.ring-track{stroke:rgba(255,255,255,.22);stroke-width:1.5;transition:stroke .4s var(--ease)}
.rec:hover .ring-track{stroke:rgba(255,255,255,.4)}
.ring-arc{
  stroke:var(--accent);stroke-width:2.5;stroke-linecap:round;
  stroke-dasharray:295.31;stroke-dashoffset:295.31;
  opacity:0;transition:stroke-dashoffset .14s linear,opacity .3s var(--ease);
}
.recorder.live .ring-arc{opacity:1}
.recorder.live .ring-track{stroke:rgba(255,255,255,.12)}
.rec-core{
  width:34px;height:34px;border-radius:50%;background:var(--accent);
  box-shadow:0 0 30px rgba(239,107,64,.5);
  transition:width .4s var(--ease),height .4s var(--ease),
             border-radius .4s var(--ease),transform .4s var(--ease);
}
.rec:hover .rec-core{transform:scale(1.07)}
.rec:active .rec-core{transform:scale(.93)}
.recorder.live .rec-core{width:29px;height:29px;border-radius:8px;
  animation:pulse 2.2s ease-in-out infinite}
.meta{font-size:13px;font-weight:500;letter-spacing:.02em;color:var(--ink-3);height:1.2em}
.recorder.live .meta{color:var(--ink);font-family:var(--mono);font-size:12.5px}

@keyframes fade{from{opacity:0}to{opacity:1}}
@keyframes rise{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
@keyframes breathe{0%,100%{opacity:.55}50%{opacity:1}}
@keyframes pulse{0%,100%{box-shadow:0 0 24px rgba(239,107,64,.42)}
                 50%{box-shadow:0 0 44px rgba(239,107,64,.75)}}

@media (max-height:700px){
  .frame{gap:13px}
  .logo{width:min(178px,50vw)}
  .lede{font-size:14.5px}
  .rec{width:84px;height:84px}
  .rec-core{width:30px;height:30px}
  .play{width:62px;height:62px}
  .btn{padding:13px 14px;font-size:14px}
  .choice{padding:11px 13px}
}
@media (max-width:380px){
  .btn{font-size:13.5px;padding:14px 10px}
  .chip{min-width:0;font-size:12.5px;padding:10px 8px}
  .sublabel{font-size:10px;letter-spacing:.12em}
  .segbtn{padding:8px 11px;font-size:12px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms!important;transition-duration:.01ms!important}
}