:root{
  --bg:#0b0c0e; --bg-2:#111316; --bg-3:#16181c;
  --line:#23262b; --line-2:#2e323a;
  --ink:#eef0f3; --ink-2:#a2a8b3; --ink-3:#6d7480;
  --accent:#f0a500; --accent-soft:rgba(240,165,0,.14); --accent-line:rgba(240,165,0,.42);
  --ok:#3ddc97; --bad:#ff6b5e;
  --r:14px; --r-s:9px;
  --sans:'Outfit',system-ui,-apple-system,sans-serif;
  --mono:'JetBrains Mono',ui-monospace,'SF Mono',Menlo,monospace;
  --shadow:0 18px 46px rgba(0,0,0,.5);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg); color:var(--ink); font-family:var(--sans);
  font-size:16px; line-height:1.55; -webkit-font-smoothing:antialiased;
  min-height:100dvh; overflow-x:hidden;
}
.mono{font-family:var(--mono);font-variant-ligatures:none}
.hidden{display:none !important}
b{font-weight:600}
em{font-style:italic}
a{color:inherit;text-decoration:none}

.grain{
  position:fixed; inset:0; z-index:60; pointer-events:none; opacity:.028;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- nav ---------- */
.nav{
  position:sticky; top:0; z-index:50; height:68px;
  display:flex; align-items:center; justify-content:space-between;
  padding:0 clamp(16px,4vw,48px);
  background:rgba(11,12,14,.82); backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.brand{display:flex;align-items:center;gap:10px;font-weight:600;letter-spacing:-.02em;font-size:1.05rem}
.brand svg{color:var(--accent)}
.nav-links{display:flex;align-items:center;gap:clamp(14px,3vw,30px);font-size:.92rem;color:var(--ink-2)}
.nav-links a:hover{color:var(--ink)}
.nav-cta{
  padding:8px 16px;border:1px solid var(--line-2);border-radius:999px;color:var(--ink);
  transition:border-color .2s,background .2s;
}
.nav-cta:hover{border-color:var(--accent-line);background:var(--accent-soft)}

/* ---------- layout ---------- */
main{max-width:1280px;margin:0 auto;padding:0 clamp(16px,4vw,48px)}
.hero{
  display:grid; grid-template-columns:minmax(0,1fr) minmax(0,520px);
  gap:clamp(28px,5vw,64px); align-items:start;
  padding:clamp(40px,7vw,84px) 0 clamp(32px,5vw,56px);
}
.hero-copy h1{
  font-size:clamp(2.1rem,4.6vw,3.5rem); line-height:1.08; letter-spacing:-.035em;
  font-weight:600; padding-bottom:4px;
}
.hero-copy h1 em{color:var(--accent);line-height:1.12;display:inline-block;padding-bottom:2px}
.lede{margin-top:20px;color:var(--ink-2);font-size:1.06rem;max-width:46ch}
.sample{
  margin-top:30px;padding:16px 18px;border-radius:var(--r-s);
  border:1px solid var(--line);background:#08090b;max-width:520px;overflow-x:auto;
}
.sample figcaption{color:var(--ink-3);font-size:.72rem;text-transform:uppercase;letter-spacing:.12em;margin-bottom:10px}
.sample pre{font-size:12.5px;line-height:1.7;color:var(--accent);white-space:pre;opacity:.85}

.panel{
  background:linear-gradient(180deg,var(--bg-2),var(--bg-3));
  border:1px solid var(--line); border-radius:var(--r); box-shadow:var(--shadow);
}
.deck{padding:clamp(18px,2.6vw,26px)}

/* ---------- segmented ---------- */
.tabs{display:flex;gap:4px;padding:4px;background:#0e0f12;border:1px solid var(--line);border-radius:999px;margin-bottom:20px}
.seg{
  flex:1;padding:9px 12px;border:0;border-radius:999px;background:transparent;
  color:var(--ink-3);font:inherit;font-size:.92rem;font-weight:500;cursor:pointer;transition:.2s;
}
.seg:hover{color:var(--ink-2)}
.seg.active{background:var(--accent);color:#17140a;font-weight:600}

/* ---------- drop ---------- */
.drop{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:7px;
  min-height:168px;padding:24px;text-align:center;cursor:pointer;
  border:1.5px dashed var(--line-2);border-radius:var(--r-s);background:#0e0f12;
  transition:border-color .2s,background .2s;
}
.drop:hover,.drop:focus-visible,.drop.over{border-color:var(--accent-line);background:var(--accent-soft);outline:none}
.drop-icon{color:var(--accent)}
.drop-main{font-weight:500}
.drop-sub,.hint{color:var(--ink-3);font-size:.84rem}
.hint{margin-top:9px;line-height:1.5}

/* ---------- fields ---------- */
.field{display:flex;flex-direction:column;gap:6px}
.field-label{font-size:.76rem;text-transform:uppercase;letter-spacing:.1em;color:var(--ink-3);font-weight:500}
input[type=url],select{
  width:100%;padding:11px 13px;background:#0e0f12;color:var(--ink);
  border:1px solid var(--line-2);border-radius:var(--r-s);font:inherit;font-size:.94rem;
  transition:border-color .18s,box-shadow .18s;
}
input[type=url]::placeholder{color:var(--ink-3)}
input[type=url]:focus,select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
select{appearance:none;cursor:pointer;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%236d7480' stroke-width='2'%3E%3Cpath d='M2 4l4 4 4-4'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 12px center;padding-right:34px}
.opts{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:20px}
.model-note{margin-top:12px;color:var(--ink-3);font-size:.84rem;min-height:1.2em}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;white-space:nowrap;
  padding:12px 20px;border-radius:var(--r-s);border:1px solid var(--line-2);
  background:transparent;color:var(--ink);font:inherit;font-size:.94rem;font-weight:500;
  cursor:pointer;transition:transform .12s,border-color .2s,background .2s;
}
.btn:hover{border-color:var(--accent-line);background:var(--accent-soft)}
.btn:active{transform:translateY(1px)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#17140a;font-weight:600}
.btn.primary:hover{background:#ffb51f;border-color:#ffb51f}
.btn.primary:disabled{opacity:.5;cursor:not-allowed;transform:none}
.btn.wide{width:100%;margin-top:18px;padding:14px}
.err{margin-top:12px;color:var(--bad);font-size:.9rem}

/* ---------- progress ---------- */
.stage{padding-bottom:clamp(40px,6vw,72px)}
.run{max-width:620px;margin:clamp(30px,6vw,70px) auto;padding:clamp(22px,3vw,32px)}
.run-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px}
.run-head h2{font-size:1.35rem;font-weight:600;letter-spacing:-.02em}
.pct{color:var(--accent);font-size:1.35rem;font-weight:700}
.bar{height:6px;border-radius:99px;background:#0e0f12;overflow:hidden;margin:16px 0 12px;border:1px solid var(--line)}
.bar-fill{height:100%;width:0;border-radius:99px;background:linear-gradient(90deg,var(--accent),#ffd166);transition:width .5s cubic-bezier(.16,1,.3,1)}
.run-msg{color:var(--ink-2);font-size:.95rem;min-height:1.4em}
.steps{list-style:none;margin:20px 0;display:grid;gap:9px}
.steps li{
  display:flex;align-items:center;gap:11px;color:var(--ink-3);font-size:.92rem;
  padding-left:2px;transition:color .3s;
}
.steps li::before{
  content:"";width:8px;height:8px;border-radius:50%;flex:none;
  border:1.5px solid var(--line-2);transition:.3s;
}
.steps li.on{color:var(--ink)}
.steps li.on::before{border-color:var(--accent);background:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}
.steps li.done{color:var(--ink-2)}
.steps li.done::before{border-color:var(--ok);background:var(--ok)}
.run .btn{margin-top:6px}

/* ---------- result head ---------- */
.result-head{
  display:flex;flex-wrap:wrap;gap:18px;align-items:flex-end;justify-content:space-between;
  padding:clamp(26px,4vw,44px) 0 22px;border-bottom:1px solid var(--line);
}
.result-head h2{font-size:clamp(1.5rem,3vw,2.1rem);font-weight:600;letter-spacing:-.03em;line-height:1.15}
.facts{display:flex;flex-wrap:wrap;gap:18px;margin-top:10px;color:var(--ink-3);font-size:.86rem}
.facts b{color:var(--accent);font-weight:700;margin-right:5px}
.head-actions{display:flex;gap:10px;flex-wrap:wrap}

/* ---------- transport ---------- */
.transport{display:flex;align-items:center;gap:clamp(12px,2vw,22px);padding:14px 18px;margin:22px 0 20px;position:sticky;top:80px;z-index:30}
.play-btn{
  width:48px;height:48px;flex:none;border-radius:50%;border:0;cursor:pointer;
  background:var(--accent);color:#17140a;display:grid;place-items:center;transition:transform .12s,background .2s;
}
.play-btn:hover{background:#ffb51f}
.play-btn:active{transform:scale(.94)}
.scrub-wrap{flex:1;min-width:0}
input[type=range]{
  width:100%;-webkit-appearance:none;appearance:none;background:transparent;cursor:pointer;height:18px;
}
input[type=range]::-webkit-slider-runnable-track{height:5px;border-radius:99px;background:#26292f}
input[type=range]::-moz-range-track{height:5px;border-radius:99px;background:#26292f}
input[type=range]::-webkit-slider-thumb{
  -webkit-appearance:none;width:14px;height:14px;border-radius:50%;background:var(--accent);
  margin-top:-4.5px;border:0;box-shadow:0 0 0 3px rgba(240,165,0,.2)
}
input[type=range]::-moz-range-thumb{width:14px;height:14px;border-radius:50%;background:var(--accent);border:0}
.times{display:flex;justify-content:space-between;color:var(--ink-3);font-size:.78rem;margin-top:1px}
.speed{display:flex;flex-direction:column;gap:4px}
.speed select{padding:7px 30px 7px 10px;font-size:.85rem}

/* ---------- mixer ---------- */
.mixer{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:12px;margin-bottom:26px}
.chan{
  padding:14px 15px;border-radius:var(--r-s);border:1px solid var(--line);background:var(--bg-2);
  cursor:pointer;transition:border-color .2s,background .2s;text-align:left;position:relative;overflow:hidden;
}
.chan::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--c)}
.chan:hover{border-color:var(--line-2);background:var(--bg-3)}
.chan.sel{border-color:var(--accent-line);background:var(--accent-soft)}
.chan.muted{opacity:.42}
.chan-top{display:flex;align-items:center;justify-content:space-between;gap:10px}
.chan-name{font-weight:600;font-size:.98rem}
.chan-sub{color:var(--ink-3);font-size:.78rem;margin-top:2px;font-family:var(--mono)}
.chan-btns{display:flex;gap:5px;margin-top:11px}
.mini-btn{
  padding:4px 10px;border-radius:6px;border:1px solid var(--line-2);background:transparent;
  color:var(--ink-3);font:inherit;font-size:.72rem;font-weight:600;letter-spacing:.05em;cursor:pointer;transition:.18s;
}
.mini-btn:hover{color:var(--ink);border-color:var(--ink-3)}
.mini-btn.on{background:var(--accent);border-color:var(--accent);color:#17140a}
.meter{height:3px;border-radius:99px;background:#0e0f12;margin-top:11px;overflow:hidden}
.meter span{display:block;height:100%;width:0;background:var(--c);transition:width .08s linear}

/* ---------- detail ---------- */
.stem-detail{display:grid;gap:18px}
.det-head{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;padding:18px 20px 0;scroll-margin-top:150px}
.det-head h3{font-size:1.2rem;font-weight:600;letter-spacing:-.02em}
.det-sub{color:var(--ink-3);font-size:.84rem;font-family:var(--mono);margin-top:3px}
.det-actions{display:flex;gap:8px;flex-wrap:wrap}
.btn.sm{padding:8px 14px;font-size:.85rem}
.tabwrap{
  margin:16px 20px 20px;padding:18px;border-radius:var(--r-s);background:#08090b;border:1px solid var(--line);
  overflow-x:auto;
}
.tabwrap pre{
  font-family:var(--mono);font-size:13px;line-height:1.72;color:var(--ink-2);
  white-space:pre;letter-spacing:.02em;
}
.tabwrap pre .bar-hl{background:var(--accent-soft);color:var(--ink);border-radius:3px}
.chordline{display:flex;flex-wrap:wrap;gap:7px;margin:0 20px 6px}
.chip{
  padding:4px 11px;border-radius:999px;border:1px solid var(--line-2);background:#0e0f12;
  font-family:var(--mono);font-size:.8rem;color:var(--ink-2);transition:.2s;
}
.chip.now{background:var(--accent);border-color:var(--accent);color:#17140a;font-weight:700}
.statline{display:flex;flex-wrap:wrap;gap:16px;margin:0 20px 18px;color:var(--ink-3);font-size:.8rem;font-family:var(--mono)}
.statline b{color:var(--ink-2);font-weight:500}
.fretboard{margin:0 20px 18px}
.note-warn{margin:0 20px 18px;color:var(--bad);font-size:.86rem}

/* ---------- how ---------- */
.how{padding:clamp(48px,7vw,90px) 0 clamp(30px,5vw,50px);border-top:1px solid var(--line)}
.how h2{font-size:clamp(1.5rem,3vw,2rem);font-weight:600;letter-spacing:-.03em;margin-bottom:26px}
.how-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:14px}
.how-grid article{padding:22px;border-radius:var(--r-s);border:1px solid var(--line);background:var(--bg-2)}
.how-a{grid-column:span 7}
.how-b{grid-column:span 5;background:linear-gradient(155deg,rgba(240,165,0,.10),transparent 58%) ,var(--bg-2)}
.how-c{grid-column:span 5}
.how-d{grid-column:span 7}
.how-grid h3{font-size:1.02rem;font-weight:600;margin-bottom:8px}
.how-grid p{color:var(--ink-2);font-size:.93rem;max-width:60ch}
.mini{list-style:none;margin-top:14px;display:grid;gap:7px;font-size:.8rem}
.mini li{display:flex;justify-content:space-between;gap:12px;color:var(--ink-3)}
.mini b{color:var(--accent);font-weight:500}

.foot{
  display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
  max-width:1280px;margin:0 auto;padding:24px clamp(16px,4vw,48px) 40px;
  border-top:1px solid var(--line);color:var(--ink-3);font-size:.84rem;
}

@media (max-width:900px){
  .hero{grid-template-columns:1fr}
  .how-grid article{grid-column:span 12 !important}
  .transport{position:static}
}
@media (max-width:560px){
  .opts{grid-template-columns:1fr}
  .result-head{align-items:flex-start}
  .tabwrap pre{font-size:11.5px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition-duration:.01ms !important}
  html{scroll-behavior:auto}
}