:root{
  --ink:#0f0d12; --bg:#17141b; --surface:#211c26; --surface-2:#2b2530;
  --line:#3a3340; --line-soft:#2c2731;
  --text:#f4eef2; --muted:#a99fb0; --muted-2:#7d7484;
  --coral:#ff6b4a; --amber:#ffb454; --teal:#56c2c0; --ok:#66d68a;
  --hit:linear-gradient(120deg,var(--amber),var(--coral));
  --font:"Segoe UI",-apple-system,system-ui,Roboto,Helvetica,Arial,sans-serif;
  --mono:ui-monospace,"Cascadia Code","Cascadia Mono",Consolas,"SF Mono",Menlo,monospace;
  --rail:64px; --ease:cubic-bezier(.22,.61,.36,1);
}
*{box-sizing:border-box;}
html,body{margin:0;height:100%;}
body{
  background:
    radial-gradient(900px 500px at 78% -8%, rgba(255,107,74,.12), transparent 60%),
    radial-gradient(700px 500px at 6% 108%, rgba(86,194,192,.10), transparent 55%),
    var(--bg);
  color:var(--text); font-family:var(--font); line-height:1.5;
  -webkit-font-smoothing:antialiased; overflow:hidden;
}
button{font-family:inherit;cursor:pointer;color:inherit;border:none;background:none;}
input,select{font-family:inherit;}
::selection{background:rgba(255,107,74,.3);}
:focus-visible{outline:2px solid var(--coral);outline-offset:2px;border-radius:6px;}
.hidden{display:none !important;}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;}
.eyebrow{font-size:11.5px;letter-spacing:.22em;text-transform:uppercase;color:var(--muted-2);font-weight:600;margin:0;}
.meta{color:var(--muted);font-size:13.5px;}
.error{color:#ff8f84;margin-top:12px;font-size:14px;}

/* ---------- rail ---------- */
#rail{position:fixed;left:0;top:0;bottom:0;width:var(--rail);z-index:50;
  background:rgba(15,13,18,.72);border-right:1px solid var(--line-soft);
  display:flex;flex-direction:column;align-items:center;padding:16px 0;gap:8px;backdrop-filter:blur(10px);}
.brandmark{width:40px;height:40px;display:grid;place-items:center;margin-bottom:14px;}
.brandmark svg{width:34px;height:34px;display:block;}
.brandmark.busy .bm-r1{animation:bmr 1.4s ease-out infinite;transform-origin:center;transform-box:fill-box;}
.brandmark.busy .bm-r2{animation:bmr 1.4s ease-out infinite .3s;transform-origin:center;transform-box:fill-box;}
@keyframes bmr{0%{opacity:.6;transform:scale(.7);}70%{opacity:0;}100%{opacity:0;transform:scale(1.25);}}
.railbtn{width:44px;height:44px;border-radius:13px;display:grid;place-items:center;color:var(--muted-2);
  position:relative;transition:color .18s,background .18s;}
.railbtn svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;}
.railbtn:hover{color:var(--text);background:rgba(255,255,255,.05);}
.railbtn.is-active{color:var(--text);}
.railbtn.is-active::before{content:"";position:absolute;left:-16px;top:50%;transform:translateY(-50%);
  width:3px;height:22px;border-radius:0 3px 3px 0;background:var(--hit);}
.railbtn.primary{color:#1a1116;background:var(--hit);box-shadow:0 6px 18px rgba(255,107,74,.28);}
.railbtn.primary:hover{filter:brightness(1.06);color:#1a1116;}
.railbtn.primary.is-active::before{display:none;}
.rail-sp{flex:1;}
.rail-tip{position:absolute;left:56px;white-space:nowrap;background:var(--surface-2);border:1px solid var(--line);
  color:var(--text);font-size:12.5px;padding:6px 10px;border-radius:8px;opacity:0;pointer-events:none;
  transform:translateX(-4px);transition:.15s;box-shadow:0 8px 22px rgba(0,0,0,.4);z-index:2;}
.railbtn:hover .rail-tip{opacity:1;transform:translateX(0);}

/* ---------- stage / screens ---------- */
#stage{position:absolute;inset:0 0 0 var(--rail);overflow:hidden;}
.screen{position:absolute;inset:0;display:none;overflow-y:auto;padding:60px 52px;}
.screen.is-active{display:block;animation:screenIn .5s var(--ease);}
@keyframes screenIn{from{opacity:0;transform:translateY(14px);}to{opacity:1;transform:none;}}
.wrap{max-width:1000px;margin:0 auto;}

/* ---------- HOME ---------- */
#s-home .wrap{max-width:880px;}
.home-top{display:flex;align-items:baseline;gap:14px;margin-bottom:8vh;}
.wordmark{font-size:20px;font-weight:800;letter-spacing:-.02em;}
.wordmark b{background:var(--hit);-webkit-background-clip:text;background-clip:text;color:transparent;}
.home-hero h1{font-size:clamp(32px,5vw,56px);line-height:1.03;letter-spacing:-.03em;font-weight:800;
  margin:0 0 18px;text-wrap:balance;max-width:15ch;}
.home-hero h1 em{font-style:normal;background:var(--hit);-webkit-background-clip:text;background-clip:text;color:transparent;}
.home-hero .lede{font-size:18px;color:var(--muted);max-width:52ch;margin:0 0 34px;}
.submit{display:flex;gap:10px;max-width:640px;background:var(--surface);border:1px solid var(--line);
  border-radius:16px;padding:8px;box-shadow:0 24px 60px rgba(0,0,0,.35);transition:border-color .2s,box-shadow .2s;}
.submit:focus-within{border-color:rgba(255,107,74,.6);box-shadow:0 24px 60px rgba(0,0,0,.4),0 0 0 3px rgba(255,107,74,.12);}
.submit .yt{display:grid;place-items:center;width:42px;color:var(--muted-2);flex-shrink:0;}
.submit .yt svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.7;}
.submit input{flex:1;background:none;border:none;color:var(--text);font-size:16px;padding:0 4px;min-width:0;}
.submit input::placeholder{color:var(--muted-2);}
.submit input:focus{outline:none;}
.btn-hit{background:var(--hit);color:#1a1116;font-weight:700;font-size:15px;border-radius:11px;
  padding:0 22px;display:flex;align-items:center;gap:8px;white-space:nowrap;transition:filter .15s,transform .05s;}
.btn-hit:hover{filter:brightness(1.06);}
.btn-hit:active{transform:scale(.985);}
.btn-hit:disabled{opacity:.6;cursor:default;filter:none;}
.btn-hit svg{width:17px;height:17px;stroke:currentColor;fill:none;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;}
.home-note{color:var(--muted-2);font-size:13px;margin-top:14px;}

.recent{margin-top:7vh;}
.recent-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;}
.link-quiet{color:var(--muted);font-size:13px;display:flex;align-items:center;gap:5px;}
.link-quiet:hover{color:var(--text);}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px;}
.card-empty{color:var(--muted-2);font-size:14px;}
.song{text-align:left;background:var(--surface);border:1px solid var(--line-soft);border-radius:14px;
  padding:15px;transition:transform .16s var(--ease),border-color .16s,background .16s;position:relative;overflow:hidden;}
.song:hover{transform:translateY(-3px);border-color:var(--line);background:var(--surface-2);}
.song .art{height:88px;border-radius:10px;margin-bottom:13px;position:relative;overflow:hidden;background:linear-gradient(135deg,#332a38,#241f2a);}
.song .art .wv{position:absolute;inset:auto 0 0 0;height:58%;display:flex;align-items:flex-end;gap:3px;padding:0 12px 12px;opacity:.7;}
.song .art .wv i{flex:1;background:linear-gradient(var(--amber),var(--coral));border-radius:2px;}
.song h3{font-size:15px;font-weight:600;margin:0 0 2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.song .by{font-size:13px;color:var(--muted);margin:0 0 11px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.chips{display:flex;gap:6px;flex-wrap:wrap;}
.chip{font-family:var(--mono);font-size:11.5px;color:var(--muted);background:rgba(255,255,255,.04);
  border:1px solid var(--line-soft);border-radius:7px;padding:3px 8px;}
.song .go{position:absolute;top:13px;right:13px;width:30px;height:30px;border-radius:9px;display:grid;place-items:center;
  background:rgba(255,255,255,.06);color:var(--text);opacity:0;transform:translateX(6px);transition:.16s;}
.song:hover .go{opacity:1;transform:none;}
.song .go svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;}

/* ---------- PROCESSING ---------- */
.proc-wrap{max-width:640px;text-align:center;padding-top:2vh;}
.proc-wrap .eyebrow{margin-bottom:8px;}
.proc-title{font-size:24px;font-weight:700;letter-spacing:-.01em;margin:0 0 3px;}
.proc-sub{color:var(--muted);font-size:14px;margin:0 0 22px;}
.proc-sub b{color:var(--text);font-weight:600;}
.kit-stage{position:relative;height:250px;display:grid;place-items:center;margin:0 auto 6px;}
.kit-stage svg{width:320px;max-width:86%;height:auto;overflow:visible;}
.eq{display:flex;align-items:flex-end;justify-content:center;gap:5px;height:32px;margin:0 auto 28px;width:170px;}
.eq i{width:5px;border-radius:3px;background:var(--hit);opacity:.9;animation:eq 1s ease-in-out infinite;}
@keyframes eq{0%,100%{height:20%;}50%{height:100%;}}
.steps{display:flex;flex-direction:column;gap:9px;max-width:440px;margin:0 auto;text-align:left;list-style:none;padding:0;}
.step{display:flex;align-items:center;gap:13px;padding:12px 15px;border-radius:12px;border:1px solid var(--line-soft);
  background:var(--surface);color:var(--muted-2);transition:.25s;}
.step .dot{width:22px;height:22px;border-radius:50%;border:2px solid var(--line);flex-shrink:0;display:grid;place-items:center;transition:.25s;position:relative;}
.step .dot svg{width:12px;height:12px;stroke:#1a1116;fill:none;stroke-width:3;stroke-linecap:round;stroke-linejoin:round;opacity:0;}
.step .lbl{font-size:14.5px;font-weight:500;flex:1;}
.step.active{color:var(--text);border-color:rgba(255,107,74,.5);background:var(--surface-2);}
.step.active .dot{border-color:var(--coral);}
.step.active .dot::after{content:"";width:8px;height:8px;border-radius:50%;background:var(--coral);animation:pulse 1s ease-in-out infinite;}
.step.done{color:var(--text);}
.step.done .dot{border-color:transparent;background:var(--ok);}
.step.done .dot svg{opacity:1;}
@keyframes pulse{0%,100%{transform:scale(.7);opacity:.6;}50%{transform:scale(1);opacity:1;}}
.proc-foot{margin-top:24px;}
.proc-foot button{color:var(--muted);text-decoration:underline;text-underline-offset:3px;font-size:13px;}
.proc-foot button:hover{color:var(--text);}
#log{text-align:left;background:#0e0c11;border:1px solid var(--line);border-radius:12px;padding:14px;
  max-height:300px;overflow-y:auto;white-space:pre-wrap;word-break:break-word;font-family:var(--mono);
  font-size:12.5px;line-height:1.55;color:var(--muted);max-width:640px;margin:14px auto 0;}

/* drum-kit motion */
.dgroup{transform-box:fill-box;transform-origin:center;}
.k-kick{animation:kick 1s ease-out infinite;transform-origin:center 70%;}
.k-snare{animation:snare 1s ease-out infinite .5s;}
.k-hat{animation:hat .5s ease-out infinite;transform-origin:center 100%;}
.k-crash{animation:cym 2s ease-out infinite;transform-origin:80% 100%;}
.k-tom1{animation:snare 2s ease-out infinite .25s;}
.k-tom2{animation:snare 2s ease-out infinite 1.25s;}
.stickL{animation:stickL 1s ease-in-out infinite;transform-origin:78% 90%;}
.stickR{animation:stickR 1s ease-in-out infinite;transform-origin:22% 90%;}
.ring{transform-origin:center;opacity:0;}
.ring.r-kick{animation:ring 1s ease-out infinite;}
.ring.r-snare{animation:ring 1s ease-out infinite .5s;}
@keyframes kick{0%,100%{transform:scale(1);}6%{transform:scale(1.06);}}
@keyframes snare{0%,100%{transform:scale(1);}8%{transform:scale(1.12);}}
@keyframes hat{0%,100%{transform:scaleY(1);}20%{transform:scaleY(.7);}}
@keyframes cym{0%,100%{transform:rotate(0);}4%{transform:rotate(-5deg);}12%{transform:rotate(3deg);}}
@keyframes stickL{0%,100%{transform:rotate(-16deg);}50%{transform:rotate(6deg);}}
@keyframes stickR{0%,100%{transform:rotate(16deg);}50%{transform:rotate(-6deg);}}
@keyframes ring{0%{opacity:.55;transform:scale(.4);}70%{opacity:0;}100%{opacity:0;transform:scale(1.5);}}

/* ---------- PLAYER ---------- */
.p-head{display:flex;align-items:flex-start;gap:16px;margin-bottom:18px;flex-wrap:wrap;}
.p-head .titleblock{flex:1;min-width:220px;}
.p-head h1{font-size:26px;font-weight:700;letter-spacing:-.01em;margin:0 0 5px;}
.p-head .by{color:var(--muted);font-size:14px;margin:0 0 9px;}
.p-actions{display:flex;gap:9px;align-items:center;flex-wrap:wrap;}
.btn{background:var(--surface);border:1px solid var(--line);border-radius:11px;padding:10px 15px;font-size:14px;
  font-weight:500;display:inline-flex;align-items:center;gap:8px;transition:.15s;color:var(--text);text-decoration:none;}
.btn:hover{border-color:var(--muted-2);background:var(--surface-2);}
.btn svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}
.btn.ghost{background:none;}
.btn.pdf{background:var(--hit);color:#1a1116;font-weight:700;border-color:transparent;}
.btn.pdf:hover{filter:brightness(1.06);background:var(--hit);}
.btn.pdf svg{stroke:#1a1116;}
.btn.icon{padding:10px;}
#player-loading{margin:0 0 14px;}

.notecard{background:#fbfaf7;border-radius:16px;padding:16px 14px;margin-bottom:16px;box-shadow:0 20px 50px rgba(0,0,0,.4);}
#notation{max-height:46vh;overflow-y:auto;overflow-x:auto;}

#transport{display:flex;align-items:center;gap:14px;background:var(--surface);border:1px solid var(--line);
  border-radius:14px;padding:12px 16px;margin-bottom:14px;flex-wrap:wrap;}
#play-btn{width:46px;height:46px;border-radius:50%;background:var(--hit);color:#1a1116;display:grid;place-items:center;
  flex-shrink:0;font-size:15px;box-shadow:0 6px 18px rgba(255,107,74,.3);transition:transform .06s;}
#play-btn:active{transform:scale(.94);}
.tc{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:13px;color:var(--muted);min-width:42px;text-align:center;}
.tc.cur{color:var(--text);}
#seekbar{flex:1;min-width:150px;-webkit-appearance:none;appearance:none;height:6px;border-radius:6px;
  background:linear-gradient(var(--coral),var(--coral)) 0/var(--p,0%) 100% no-repeat, var(--line);cursor:pointer;}
#seekbar::-webkit-slider-thumb{-webkit-appearance:none;width:15px;height:15px;border-radius:50%;background:var(--text);
  border:3px solid var(--coral);box-shadow:0 2px 6px rgba(0,0,0,.4);}
#seekbar::-moz-range-thumb{width:13px;height:13px;border-radius:50%;background:var(--text);border:3px solid var(--coral);}
.tctl{display:flex;align-items:center;gap:7px;font-size:12.5px;color:var(--muted);}
.tctl.hear{gap:9px;}
.tctl select{background:var(--ink);color:var(--text);border:1px solid var(--line);border-radius:8px;
  padding:6px 8px;font-size:12.5px;font-family:var(--mono);}
.seg{display:flex;background:var(--ink);border:1px solid var(--line);border-radius:10px;padding:3px;gap:2px;}
.seg button{font-size:12.5px;font-weight:600;padding:6px 11px;border-radius:7px;color:var(--muted);white-space:nowrap;}
.seg button.on{background:var(--surface-2);color:var(--text);}
.seg button.on[data-hear="drums"]{color:var(--teal);}
.seg button.on[data-hear="gen"]{color:var(--coral);}
.seg button:disabled{opacity:.4;cursor:not-allowed;}
.loop-ctl{display:flex;align-items:center;gap:6px;}
.loopbtn{font-size:12px;font-weight:600;padding:7px 10px;border-radius:8px;border:1px solid var(--line);color:var(--muted);background:var(--ink);}
.loopbtn:hover{color:var(--text);}
.loopbtn.armed{border-color:var(--coral);color:var(--coral);}
.loopbtn:disabled{opacity:.4;cursor:not-allowed;}
.loop-label{font-size:12px;color:var(--coral);font-family:var(--mono);font-variant-numeric:tabular-nums;}

.mixer{background:var(--surface);border:1px solid var(--line-soft);border-radius:14px;overflow:hidden;}
.mixer>summary{list-style:none;cursor:pointer;padding:14px 16px;display:flex;align-items:center;gap:10px;font-size:13.5px;font-weight:600;color:var(--text);}
.mixer>summary::-webkit-details-marker{display:none;}
.mixer>summary .chev{margin-left:auto;color:var(--muted);transition:transform .2s;}
.mixer[open]>summary .chev{transform:rotate(180deg);}
.mixer>summary .chev svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:2;}
.mixer .hint{color:var(--muted-2);font-weight:400;font-size:12px;}
#mixer-rows{padding:2px 16px 14px;}
.mrow{display:flex;align-items:center;gap:12px;padding:9px 0;border-top:1px solid var(--line-soft);}
.mrow .swatch{width:9px;height:9px;border-radius:50%;flex-shrink:0;}
.mrow .name{font-size:13.5px;flex:1;}
.mrow .name small{color:var(--muted-2);font-family:var(--mono);font-size:11.5px;margin-left:7px;}
.mrow .ms{display:flex;gap:6px;}
.mbtn{font-size:11px;font-weight:700;width:30px;height:26px;border-radius:7px;border:1px solid var(--line);color:var(--muted-2);background:var(--ink);}
.mbtn.mute.on{border-color:var(--coral);color:var(--coral);}
.mbtn.solo.on{border-color:var(--amber);color:var(--amber);}
.mbtn:disabled{opacity:.35;cursor:not-allowed;}
.p-tip{color:var(--muted-2);font-size:12.5px;margin-top:16px;max-width:72ch;}
.p-tip b{color:var(--muted);font-weight:600;}

/* ---------- PDF ---------- */
.pdf-wrap{max-width:1000px;height:calc(100vh - 120px);display:flex;flex-direction:column;}
.pdf-head{display:flex;align-items:center;gap:14px;margin-bottom:16px;}
.pdf-title{font-weight:600;font-size:16px;flex:1;}
#pdf-pages{flex:1;overflow-y:auto;display:flex;flex-direction:column;align-items:center;gap:20px;padding:4px 4px 40px;}
#pdf-pages img{max-width:100%;background:#fff;border-radius:4px;box-shadow:0 8px 24px rgba(0,0,0,.4);}
.pdf-error{color:var(--muted);padding:20px;}
.pdf-error a{color:var(--coral);}

/* ---------- drawers ---------- */
.scrim{position:fixed;inset:0;background:rgba(10,8,12,.55);z-index:70;opacity:0;pointer-events:none;transition:.25s;backdrop-filter:blur(2px);}
.scrim.show{opacity:1;pointer-events:auto;}
.drawer{position:fixed;top:0;bottom:0;z-index:80;width:380px;max-width:92vw;background:var(--bg);
  display:flex;flex-direction:column;transition:transform .3s var(--ease);}
.drawer.right{right:0;border-left:1px solid var(--line);box-shadow:-30px 0 60px rgba(0,0,0,.5);transform:translateX(100%);}
.drawer.left{left:0;border-right:1px solid var(--line);box-shadow:30px 0 60px rgba(0,0,0,.5);transform:translateX(-100%);}
.drawer.open{transform:none;}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:20px 22px 14px;}
.drawer-head h2{font-size:17px;font-weight:700;margin:2px 0 0;}
.xbtn{width:34px;height:34px;border-radius:9px;display:grid;place-items:center;color:var(--muted);background:var(--surface);}
.xbtn:hover{color:var(--text);background:var(--surface-2);}
.xbtn svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;}
.drawer-body{overflow-y:auto;padding:8px 22px 26px;}
.adv-sec{margin-top:22px;}
.adv-sec:first-child{margin-top:6px;}
.adv-sec .eyebrow{margin-bottom:10px;}
.adv-note{color:var(--muted-2);font-size:12.5px;margin:0 0 14px;}
.field{margin-bottom:13px;}
.field label{display:block;font-size:12.5px;color:var(--muted);margin-bottom:6px;}
.field input,.field select{width:100%;background:var(--surface);color:var(--text);border:1px solid var(--line);
  border-radius:9px;padding:10px 12px;font-size:14px;font-family:var(--mono);}
.field input:focus,.field select:focus{outline:none;border-color:var(--coral);}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:11px;}
.btn-wide{width:100%;justify-content:center;margin-top:6px;background:var(--surface);border:1px solid var(--line);}
.dl{display:flex;flex-direction:column;gap:8px;}
.dl a{display:flex;align-items:center;gap:11px;background:var(--surface);border:1px solid var(--line-soft);
  border-radius:11px;padding:12px 14px;color:var(--text);text-decoration:none;font-size:14px;transition:.15s;}
.dl a:hover{border-color:var(--muted-2);background:var(--surface-2);}
.dl a svg{width:18px;height:18px;stroke:var(--muted);fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0;}
.dl a small{margin-left:auto;color:var(--muted-2);font-family:var(--mono);font-size:11.5px;}
.lib-list{display:flex;flex-direction:column;gap:10px;}
.lib-empty{color:var(--muted-2);font-size:14px;padding:8px 2px;}
.lib-item{display:flex;gap:12px;align-items:center;text-align:left;background:var(--surface);border:1px solid var(--line-soft);
  border-radius:12px;padding:11px;transition:.15s;width:100%;}
.lib-item:hover{border-color:var(--muted-2);background:var(--surface-2);}
.lib-item.selected{border-color:var(--coral);}
.lib-item .thumb{width:46px;height:46px;border-radius:9px;flex-shrink:0;background:linear-gradient(135deg,#332a38,#241f2a);display:grid;place-items:center;color:var(--muted);}
.lib-item .thumb svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.7;}
.lib-item .li-meta{flex:1;min-width:0;}
.lib-item .li-meta h4{font-size:14px;font-weight:600;margin:0 0 1px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.lib-item .li-meta p{font-size:12.5px;color:var(--muted);margin:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.lib-item .li-meta .li-sub{font-family:var(--mono);font-size:11px;color:var(--muted-2);}

/* ---------- toast ---------- */
#toast{position:fixed;bottom:26px;left:calc(50% + var(--rail)/2);transform:translateX(-50%) translateY(20px);z-index:90;
  background:var(--surface-2);border:1px solid var(--line);border-radius:12px;padding:13px 18px;font-size:14px;
  display:flex;align-items:center;gap:11px;box-shadow:0 20px 50px rgba(0,0,0,.5);opacity:0;pointer-events:none;transition:.28s var(--ease);max-width:80vw;}
#toast.show{opacity:1;transform:translateX(-50%) translateY(0);}
#toast .spin{width:16px;height:16px;border-radius:50%;border:2px solid var(--line);border-top-color:var(--coral);animation:spin .7s linear infinite;flex-shrink:0;}
@keyframes spin{to{transform:rotate(360deg);}}
#toast svg{width:17px;height:17px;stroke:var(--ok);fill:none;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0;}

/* ---------- auth gate + account menu ---------- */
body.booting #rail,
body.booting #stage,
body.booting #auth-view,
body.booting #account-menu{display:none !important;}

/* Sign-in is a modal now (the app is open to guests). */
#auth-view{display:none;position:fixed;inset:0;z-index:100;overflow-y:auto;padding:40px 20px;place-items:center;
  background:rgba(10,8,12,.6);backdrop-filter:blur(4px);}
#auth-view.open{display:grid;}
.auth-card{position:relative;width:100%;max-width:400px;background:var(--surface);border:1px solid var(--line);
  border-radius:20px;padding:34px 32px;box-shadow:0 30px 70px rgba(0,0,0,.55);animation:screenIn .35s var(--ease);}
.auth-close{position:absolute;top:14px;right:14px;width:32px;height:32px;border-radius:9px;display:grid;place-items:center;color:var(--muted);background:var(--surface-2);}
.auth-close:hover{color:var(--text);}
.auth-close svg{width:17px;height:17px;stroke:currentColor;fill:none;}

/* Preview lock (freemium): shown under the 4-bar preview for guests. */
#preview-lock{display:flex;align-items:center;gap:15px;margin-bottom:16px;padding:15px 18px;border-radius:14px;cursor:pointer;
  background:linear-gradient(120deg, rgba(255,180,84,.13), rgba(255,107,74,.13));border:1px solid rgba(255,140,90,.35);}
#preview-lock > svg{width:26px;height:26px;stroke:var(--amber);fill:none;flex-shrink:0;}
#preview-lock .pl-text{flex:1;display:flex;flex-direction:column;gap:2px;min-width:0;}
#preview-lock .pl-text strong{font-size:14.5px;font-weight:700;}
#preview-lock .pl-text span{font-size:12.5px;color:var(--muted);}
#preview-lock #unlock-btn{flex-shrink:0;}
.auth-brand{display:flex;align-items:center;gap:10px;}
.auth-brand .wordmark{font-size:22px;font-weight:800;letter-spacing:-.02em;}
.auth-brand .wordmark b{background:var(--hit);-webkit-background-clip:text;background-clip:text;color:transparent;}
.auth-tagline{color:var(--muted);font-size:14px;margin:14px 0 24px;text-wrap:balance;}
.auth-tabs{display:flex;background:var(--ink);border:1px solid var(--line);border-radius:11px;padding:4px;gap:3px;margin-bottom:22px;}
.auth-tabs button{flex:1;font-size:13.5px;font-weight:600;padding:9px;border-radius:8px;color:var(--muted);}
.auth-tabs button.on{background:var(--surface-2);color:var(--text);}
#auth-form .field{margin-bottom:14px;}
#auth-form label{display:block;font-size:12.5px;color:var(--muted);margin-bottom:6px;}
#auth-form input{width:100%;background:var(--ink);color:var(--text);border:1px solid var(--line);border-radius:10px;padding:11px 13px;font-size:15px;}
#auth-form input:focus{outline:none;border-color:var(--coral);}
.auth-submit{width:100%;justify-content:center;padding:12px;margin-top:6px;font-size:15px;}
.google-btn{width:100%;display:flex;align-items:center;justify-content:center;gap:10px;padding:11px;border-radius:11px;
  border:1px solid var(--line);background:var(--surface-2);color:var(--text);font-weight:600;font-size:14px;margin-bottom:16px;transition:.15s;}
.google-btn:hover{border-color:var(--muted-2);}
.auth-or{display:flex;align-items:center;gap:12px;color:var(--muted-2);font-size:11px;text-transform:uppercase;letter-spacing:.12em;margin-bottom:16px;}
.auth-or::before,.auth-or::after{content:"";flex:1;height:1px;background:var(--line);}

#account-menu{position:fixed;left:14px;bottom:62px;z-index:95;width:222px;background:var(--surface-2);
  border:1px solid var(--line);border-radius:12px;padding:6px;box-shadow:0 20px 50px rgba(0,0,0,.5);animation:screenIn .18s var(--ease);}
.acct-info{padding:10px 12px 12px;border-bottom:1px solid var(--line-soft);margin-bottom:6px;}
.acct-name{font-size:14px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.acct-email{font-size:12.5px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.acct-logout{display:flex;align-items:center;gap:9px;width:100%;padding:10px 12px;border-radius:8px;color:var(--text);font-size:13.5px;font-weight:500;}
.acct-logout:hover{background:rgba(255,255,255,.05);}
.acct-logout svg{width:17px;height:17px;}

/* ---------- YouTube embed (original song, bottom-right) ---------- */
#yt-embed-wrap{position:fixed;right:18px;bottom:18px;z-index:45;width:300px;max-width:calc(100vw - 36px);
  background:var(--surface-2);border:1px solid var(--line);border-radius:12px;overflow:hidden;box-shadow:0 16px 40px rgba(0,0,0,.5);}
.yt-embed-head{font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);
  font-weight:600;padding:8px 12px;border-bottom:1px solid var(--line-soft);cursor:move;user-select:none;
  display:flex;align-items:center;gap:7px;touch-action:none;}
.yt-embed-head::before{content:"⠿";font-size:13px;color:var(--muted-2);letter-spacing:0;}
#yt-embed-wrap.dragging{box-shadow:0 24px 60px rgba(0,0,0,.6);opacity:.96;}

.speed-ctl{gap:9px;}
#speed{-webkit-appearance:none;appearance:none;width:96px;height:5px;border-radius:5px;background:var(--line);cursor:pointer;}
#speed::-webkit-slider-thumb{-webkit-appearance:none;width:14px;height:14px;border-radius:50%;background:var(--text);border:3px solid var(--coral);box-shadow:0 1px 4px rgba(0,0,0,.4);}
#speed::-moz-range-thumb{width:11px;height:11px;border-radius:50%;background:var(--text);border:3px solid var(--coral);}
#speed-val{font-size:12.5px;color:var(--text);min-width:40px;}
#yt-embed{display:block;width:100%;height:169px;border:0;background:#000;}

@media (max-width:720px){
  .screen{padding:44px 24px;}
  .home-top{margin-bottom:5vh;}
  #yt-embed-wrap{width:240px;}
  #yt-embed{height:135px;}
}

/* ---------- phones ---------- */
@media (max-width:600px){
  .screen{padding:22px 16px 48px;}
  .home-top{margin-bottom:4vh;}
  .home-hero .lede{font-size:16px;}

  /* submit: stack the input above a full-width button */
  .submit{flex-direction:column;gap:8px;padding:10px;border-radius:14px;}
  .submit .yt{display:none;}
  .submit input{width:100%;padding:8px 6px;font-size:16px;}  /* 16px avoids iOS zoom-on-focus */
  #submit-form .btn-hit{width:100%;justify-content:center;padding:13px;}

  /* player header + actions */
  .p-head{gap:10px;margin-bottom:14px;}
  .p-head h1{font-size:21px;}
  .p-actions{width:100%;}
  .p-actions .btn{flex:1 1 auto;justify-content:center;}
  .p-actions .btn.icon{flex:0 0 auto;}

  /* transport: one clean control group per row, nothing overflowing */
  #transport{gap:11px;padding:12px 13px;}
  #seekbar{min-width:70px;}
  .tctl.hear,.speed-ctl,.loop-ctl{flex:1 1 100%;}
  .tctl.hear{flex-wrap:wrap;gap:8px;}
  #hear-seg{display:flex;width:100%;}
  #hear-seg button{flex:1;padding:9px 4px;font-size:11.5px;text-align:center;white-space:normal;line-height:1.15;}
  .loop-ctl{flex-wrap:wrap;}
  .loop-label{flex-basis:100%;}

  #notation{max-height:44vh;}

  /* YouTube "original song": a small draggable thumbnail tucked into the top-
     right corner so it clears both the action buttons and the bottom transport;
     drag it anywhere. Compact single-line header to keep it short. */
  #yt-embed-wrap{width:140px;left:auto;right:8px;top:8px;bottom:auto;}
  #yt-embed{height:79px;}
  .yt-embed-head{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:9.5px;padding:5px 9px;}

  /* comfier touch targets */
  .mbtn{width:34px;height:30px;}
  .loopbtn{padding:8px 12px;}
  .auth-card{padding:28px 22px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;}
}