:root{
  --bg:#06070c;--panel:#0e1119;--line:#263044;--text:#edf4fb;--muted:#94a0b4;
  --cyan:#7de9ff;--orange:#ffb55e;--green:#87f2b1;--red:#ff8d96;--yellow:#ffe78a;
}
*{box-sizing:border-box}
html{background:var(--bg);color-scheme:dark}
body{margin:0;color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:
radial-gradient(circle at 14% -8%,rgba(125,233,255,.09),transparent 31%),
radial-gradient(circle at 90% 0%,rgba(255,181,94,.07),transparent 24%),
linear-gradient(180deg,#070910,#05060a 75%)}
button,input,select{font:inherit} button{cursor:pointer}
.app{width:min(1280px,calc(100% - 24px));margin:auto;padding:20px 0 48px}
.topbar,.hero,.card-head{display:flex;align-items:center;justify-content:space-between;gap:16px}
.topbar{margin-bottom:22px}
.back{color:var(--cyan);text-decoration:none;text-transform:uppercase;letter-spacing:.14em;font-size:.74rem}
.status-pill,.source-label,.count{border:1px solid var(--line);border-radius:999px;padding:7px 10px;color:var(--muted);font-size:.7rem}
.hero{align-items:end;margin-bottom:18px}
.kicker,.eyebrow{font-size:.68rem;text-transform:uppercase;letter-spacing:.18em;color:var(--orange)}
h1{margin:4px 0 0;color:var(--cyan);font-size:clamp(2.5rem,6vw,5.4rem);line-height:.94;letter-spacing:-.05em}
.hero p{max-width:760px;color:var(--muted);line-height:1.6;margin:13px 0 0}
.hero-actions,.current-actions,.stack-toolbar{display:flex;gap:8px;flex-wrap:wrap}
.layout{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(290px,.55fr);gap:16px;align-items:start}
.main-col,.side-col{display:grid;gap:16px}
.card{background:linear-gradient(180deg,rgba(15,19,29,.96),rgba(9,12,19,.97));border:1px solid var(--line);border-radius:18px;overflow:hidden}
.card-head{padding:15px 17px;border-bottom:1px solid var(--line)}
.card-head h2{margin:4px 0 0;font-size:1.04rem}
.section{padding:16px}
.current-grid{display:grid;grid-template-columns:minmax(230px,.7fr) 1.25fr;gap:16px;padding:16px}
.current-display{border:1px solid rgba(125,233,255,.16);border-radius:14px;padding:18px;background:rgba(2,6,12,.5);display:flex;flex-direction:column;justify-content:center}
.frequency-big{font-size:clamp(3rem,7vw,6.5rem);font-weight:720;letter-spacing:-.06em;line-height:.9;font-variant-numeric:tabular-nums}
.frequency-big small{font-size:.25em;color:var(--cyan);margin-left:8px}
.note-line{display:flex;gap:10px;align-items:baseline;margin-top:12px;flex-wrap:wrap}
.note-line strong{font-size:1.12rem;color:var(--orange)}
.note-line span{font-size:.75rem;color:var(--muted)}
.current-warning{min-height:18px;margin-top:8px;color:var(--yellow);font-size:.72rem;line-height:1.4}
.current-controls{display:grid;align-content:center}
.field{display:grid;gap:7px;margin-bottom:12px}
.field label{font-size:.74rem;color:var(--muted)}
input[type="number"],select{width:100%;min-height:44px;border:1px solid var(--line);border-radius:10px;background:#080d15;color:var(--text);padding:8px 10px;outline:none}
input:focus,select:focus,button:focus-visible{outline:2px solid rgba(125,233,255,.55);outline-offset:2px}
input[type="range"]{width:100%;accent-color:var(--cyan)}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.btn{min-height:42px;border-radius:10px;border:1px solid var(--line);background:rgba(125,233,255,.055);color:var(--cyan);padding:8px 11px;font-weight:620}
.btn:hover{background:rgba(125,233,255,.1)}
.btn.primary{background:var(--cyan);border-color:transparent;color:#041017}
.btn.orange{color:var(--orange);border-color:rgba(255,181,94,.3);background:rgba(255,181,94,.06)}
.btn.danger{color:var(--red);border-color:rgba(255,141,150,.28);background:rgba(255,141,150,.055)}
.small,.disclaimer{font-size:.7rem;line-height:1.45;color:var(--muted)}
.interval-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}
.interval-btn{text-align:left;border:1px solid var(--line);background:rgba(125,233,255,.025);border-radius:11px;padding:10px;color:var(--text);min-height:78px}
.interval-btn:hover{border-color:rgba(125,233,255,.5);background:rgba(125,233,255,.065)}
.interval-btn strong{display:block;color:var(--cyan);font-size:.79rem}
.interval-btn span{display:block;color:var(--muted);font-size:.65rem;margin-top:4px}
.interval-btn em{display:block;color:var(--orange);font-style:normal;font-size:.66rem;margin-top:6px;font-variant-numeric:tabular-nums}
.preset-list{display:grid;gap:8px}
.preset{width:100%;text-align:left;border:1px solid rgba(255,181,94,.24);background:rgba(255,181,94,.035);border-radius:11px;padding:11px;color:var(--text)}
.preset:hover{border-color:rgba(255,181,94,.55);background:rgba(255,181,94,.08)}
.preset strong{display:block;color:var(--orange);font-size:.92rem}
.preset span{display:block;font-size:.74rem;margin-top:2px}
.preset small{display:block;color:var(--muted);font-size:.64rem;margin-top:3px}
.disclaimer{margin:11px 0 0;color:#78849a}
.stack-toolbar{padding:12px;border-bottom:1px solid var(--line)}
.stack-list{display:grid}
.empty{padding:18px;color:var(--muted);font-size:.74rem}
.stack-row{display:grid;grid-template-columns:minmax(0,1fr) 90px 95px auto auto auto;gap:7px;align-items:center;padding:10px 12px;border-bottom:1px solid rgba(38,48,68,.75)}
.stack-info{min-width:0}
.stack-info strong{display:block;font-size:.77rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.stack-info span{display:block;color:var(--muted);font-size:.64rem;margin-top:3px}
.stack-row select{min-height:36px;font-size:.68rem;padding:5px 6px}
.stack-vol{display:grid;grid-template-columns:1fr 28px;gap:4px;align-items:center}
.stack-vol span{font-size:.61rem;color:var(--muted)}
.icon-btn{width:36px;height:36px;min-height:36px;padding:0}
.master-strip{padding:12px;border-top:1px solid var(--line);display:grid;gap:7px}
.master-strip label{font-size:.72rem;color:var(--muted)}
footer{margin-top:18px;text-align:center;color:#727f93;font-size:.69rem;line-height:1.5}
@media(max-width:920px){.layout{grid-template-columns:1fr}.side-col{grid-row:1}.current-grid{grid-template-columns:1fr}}
@media(max-width:680px){.hero{align-items:flex-start;flex-direction:column}.interval-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.two-col{grid-template-columns:1fr}.stack-row{grid-template-columns:minmax(0,1fr) 82px auto auto}.stack-vol{grid-column:1 / span 2}}
@media(max-width:420px){.app{width:min(100% - 14px,1280px)}.interval-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:7px}.interval-btn{min-height:72px;padding:9px 8px}.interval-btn strong{font-size:.73rem}.interval-btn span{font-size:.6rem}.interval-btn em{font-size:.62rem}.hero-actions,.current-actions,.stack-toolbar{display:grid;grid-template-columns:1fr;width:100%}.stack-row{grid-template-columns:minmax(0,1fr) auto auto}.stack-row select{grid-column:1}.stack-vol{grid-column:1/-1}}

.current-head-tools{display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:flex-end}
.btn.mini{min-height:34px;padding:6px 9px;font-size:.7rem}
.btn:disabled{opacity:.42;cursor:not-allowed}
.interval-root-box{display:grid;gap:2px;text-align:right}
.interval-root-box span{font-size:.63rem;text-transform:uppercase;letter-spacing:.14em;color:var(--muted)}
.interval-root-box strong{font-size:.72rem;color:var(--orange);font-weight:650}
@media(max-width:680px){
  .current-head-tools{width:100%;justify-content:flex-start}
  .interval-root-box{text-align:left;width:100%}
}

.preset-groups{display:grid;gap:16px}
.preset-group{display:grid;gap:8px}
.preset-group-title{font-size:.65rem;text-transform:uppercase;letter-spacing:.16em;color:var(--muted);padding:0 2px 2px}
.preset-card{border:1px solid rgba(255,181,94,.2);border-radius:12px;background:rgba(255,181,94,.025);overflow:hidden}
.preset-card .preset{border:0;border-radius:0;background:transparent}
.preset-card .preset:hover{background:rgba(255,181,94,.07)}
.preset-detail-toggle{width:100%;border:0;border-top:1px solid rgba(255,181,94,.12);background:rgba(255,181,94,.03);color:var(--cyan);text-align:left;padding:8px 11px;font-size:.68rem;font-weight:650;cursor:pointer}
.preset-detail-toggle:hover{background:rgba(125,233,255,.06)}
.preset-detail{padding:10px 11px 11px;border-top:1px solid rgba(125,233,255,.12);font-size:.68rem;line-height:1.5;color:var(--muted)}
.preset-detail b{display:block;color:var(--text);margin-bottom:2px}
.preset-detail em{display:block;font-style:normal;color:#7f8ca1;margin-top:5px}

.piano-bank{display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:flex-end}
.piano-bank span{font-size:.68rem;color:var(--muted);min-width:120px;text-align:center}
.piano-help{margin:0 0 12px}
.piano-help b{color:var(--text)}
.piano-scroll{overflow-x:auto;padding:4px 2px 10px}
.piano{position:relative;height:190px;min-width:max-content}
.piano-key{position:absolute;top:0;border-radius:0 0 8px 8px;border:1px solid #313b4e;padding:0;display:flex;align-items:flex-end;justify-content:center;transition:transform .05s ease,background .08s ease,border-color .08s ease;user-select:none}
.piano-key.white{width:52px;height:188px;background:linear-gradient(180deg,#f8fbff,#d8e0ea);color:#0b1119;z-index:1}
.piano-key.black{width:34px;height:116px;background:linear-gradient(180deg,#111723,#02050a);color:#edf4fb;z-index:2;border-color:#02050a}
.piano-key:hover,.piano-key.active{border-color:var(--orange)}
.piano-key.white:hover,.piano-key.white.active{background:linear-gradient(180deg,#fff7e9,#e9d0a9)}
.piano-key.black:hover,.piano-key.black.active{background:linear-gradient(180deg,#4b3823,#15100b)}
.piano-key.pressed{transform:translateY(3px);box-shadow:inset 0 5px 12px rgba(0,0,0,.28)}
.piano-interval{font-size:.61rem;font-weight:750;margin-bottom:12px;writing-mode:vertical-rl;transform:rotate(180deg);white-space:nowrap}
.piano-key.black .piano-interval{font-size:.56rem;margin-bottom:9px}
.piano-key kbd{position:absolute;top:8px;left:50%;transform:translateX(-50%);font-family:inherit;font-size:.58rem;font-weight:800;border:1px solid currentColor;border-radius:5px;padding:2px 4px;opacity:.78;background:rgba(255,255,255,.08)}
.piano-key.white kbd{background:rgba(0,0,0,.06)}
@media(max-width:680px){
  .piano-bank{width:100%;justify-content:flex-start}
  .piano-bank span{text-align:left}
}

.interval-help{margin:0 0 10px}