:root{
  --bg:#0b0d10; --panel:#12161b; --panel2:#171c22; --line:#232a32; --fg:#e6ebf0; --muted:#8793a0; --accent:#ffb23e; --a:#42d392; --b:#e8c14a; --c:#ef6a5b; --blue:#59a6ff;
  color-scheme:dark;
}
@media (prefers-color-scheme: light){ :root{ --bg:#eef0f3; --panel:#ffffff; --panel2:#f3f5f8; --line:#d7dce2; --fg:#14181d; --muted:#5d6874; --accent:#c96a00; --a:#118a57; --b:#9a7406; --c:#c2402f; --blue:#1c63b8; color-scheme:light; } }
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:14px/1.4 ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;display:flex;flex-direction:column}
header{display:flex;gap:18px;align-items:center;padding:10px 16px;border-bottom:1px solid var(--line);background:var(--panel);flex-wrap:wrap}
.brand{font-weight:600;letter-spacing:.08em;display:flex;gap:8px;align-items:center}
.brand b{color:var(--accent)} .brand i{font-style:normal;color:var(--muted);font-weight:400;letter-spacing:0}
.dot{width:10px;height:10px;border-radius:50%;background:var(--muted)} .dot.live{background:var(--a);box-shadow:0 0 8px var(--a)}
nav{display:flex;gap:4px}
.tab{background:none;border:1px solid transparent;color:var(--muted);padding:6px 12px;border-radius:6px;cursor:pointer;font:inherit}
.tab.on{color:var(--fg);border-color:var(--line);background:var(--panel2)}
.status{margin-left:auto;display:flex;gap:12px;align-items:center;color:var(--muted);flex-wrap:wrap}
.vol{display:flex;gap:6px;align-items:center}
button{font:inherit;color:var(--fg);background:var(--panel2);border:1px solid var(--line);border-radius:6px;padding:6px 12px;cursor:pointer}
button:hover{border-color:var(--muted)} button.primary{background:var(--accent);color:#1a1100;border-color:var(--accent);font-weight:600}
kbd{font:11px ui-monospace,monospace;background:var(--panel2);border:1px solid var(--line);border-bottom-width:2px;border-radius:4px;padding:0 5px;color:var(--muted)}
main{flex:1;min-height:0;display:flex}
.pane{display:none;flex:1;min-height:0;padding:12px 16px;gap:16px} .pane.on{display:flex}
.list-col{flex:1.3;min-width:0;display:flex;flex-direction:column;min-height:0}
.side-col{flex:1;min-width:300px;max-width:520px;overflow:auto;display:flex;flex-direction:column;gap:12px}
.toolbar{display:flex;flex-direction:column;gap:8px;margin-bottom:8px}
input[type=search]{background:var(--panel);border:1px solid var(--line);color:var(--fg);border-radius:6px;padding:8px 10px;font:inherit}
.chips{display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.chip{border:1px solid var(--line);border-radius:999px;padding:3px 10px;cursor:pointer;color:var(--muted);background:var(--panel);user-select:none}
.chip.on{color:var(--fg);border-color:var(--accent);background:var(--panel2)}
.chip.check input{margin-right:4px}
.muted{color:var(--muted)} .small{font-size:12px}
.list{flex:1;min-height:0;overflow:auto;border:1px solid var(--line);border-radius:8px;background:var(--panel);outline:none}
.row-p{display:grid;grid-template-columns:48px 1fr 66px 26px 26px 20px;gap:8px;align-items:center;padding:6px 10px;border-bottom:1px solid var(--line);cursor:pointer}
.row-p:hover{background:var(--panel2)} .row-p.sel{background:color-mix(in srgb,var(--accent) 18%,var(--panel));box-shadow:inset 3px 0 var(--accent)}
.row-p .id{color:var(--muted);font:12px ui-monospace,monospace} .row-p .cat{color:var(--muted);font-size:11px;letter-spacing:.06em}
.g{display:inline-block;width:22px;text-align:center;border-radius:4px;font:700 11px ui-monospace,monospace;padding:1px 0;color:#0b0d10}
.g.A{background:var(--a)} .g.B{background:var(--b)} .g.C{background:var(--c)} .g.N{background:var(--line);color:var(--muted)}
.card{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:12px 14px}
.card h3{margin:0 0 8px;font-size:12px;letter-spacing:.1em;color:var(--muted);text-transform:uppercase}
.d-name{font-size:20px;font-weight:600} .d-sub{color:var(--muted);margin-top:2px}
.tags{display:flex;gap:5px;flex-wrap:wrap;margin-top:10px} .tag{font-size:11px;border:1px solid var(--line);border-radius:4px;padding:1px 6px;color:var(--muted)} .tag.gap{border-color:var(--c);color:var(--c)}
.grades{margin-top:10px;display:flex;gap:14px;flex-wrap:wrap;font-size:12px;color:var(--muted);align-items:center}
.d-load{margin-top:8px;font-size:12px;color:var(--muted);min-height:16px}
.seg{display:flex;border:1px solid var(--line);border-radius:8px;overflow:hidden;margin-bottom:8px}
.seg button{flex:1;border:0;border-radius:0;background:var(--panel2);border-right:1px solid var(--line);padding:8px 6px}
.seg button:last-child{border-right:0} .seg button.on{background:var(--accent);color:#1a1100;font-weight:600}
.row{display:flex;gap:14px;align-items:center;margin:8px 0;flex-wrap:wrap} .row label{display:flex;gap:6px;align-items:center;color:var(--muted)}
.row input[type=range]{width:130px}
.kbd{position:relative;height:84px;margin-top:10px;user-select:none;touch-action:none}
.k{position:absolute;top:0;height:84px;border:1px solid #555;border-radius:0 0 4px 4px;background:#f4f4f2;cursor:pointer}
.k.black{height:52px;background:#1b1b1d;z-index:2;border-color:#000} .k.down{background:var(--accent)}
#toast{position:fixed;left:50%;bottom:18px;transform:translateX(-50%);background:var(--panel2);border:1px solid var(--line);padding:8px 14px;border-radius:8px;display:none;max-width:80vw;z-index:9}
@media (max-width:900px){ .pane.on{flex-direction:column} .side-col{max-width:none} .list-col{min-height:50vh} }

select{background:var(--panel);color:var(--fg);border:1px solid var(--line);border-radius:999px;padding:3px 8px;font:inherit}
textarea{width:100%;margin-top:8px;background:var(--panel2);color:var(--fg);border:1px solid var(--line);border-radius:6px;padding:8px;font:inherit;resize:vertical}
textarea:focus{outline:1px solid var(--accent)}
#verdict.rejected{border-color:var(--c)} #verdict.approved{border-color:var(--a)}
#vNo.on{background:var(--c);color:#fff;font-weight:600} #vOk.on{background:var(--a);color:#06150e;font-weight:600}
#vReasons{margin-top:2px}
.vm{text-align:center;font-weight:700} .vm.rejected{color:var(--c)} .vm.approved{color:var(--a)} .vm.note{color:var(--blue)}

/* the virtual Drumboy: a plate in the hardware's layout; every size is a share of the plate's width (cqw), so it scales as a whole */
#panelWrap{flex:1;min-width:0;display:flex;flex-direction:column;align-items:center;gap:12px;overflow:auto;padding:4px 0 16px}
#plate{--ink:#d9dce2;--ink2:#8e939c;--cap:#0e0f11;--rim:#2d3036;position:relative;width:min(100%,1180px);aspect-ratio:1588/902;container-type:inline-size;flex:none;
  background:linear-gradient(180deg,#1a1b1e,#141517);border-radius:3cqw;box-shadow:0 0 0 .25cqw #08090a,0 1.4cqw 3cqw rgba(0,0,0,.55),inset 0 0 0 .18cqw #2a2c31;color:var(--ink);user-select:none;touch-action:none}
#plate>*{position:absolute;transform:translate(-50%,-50%)}
#plate .key{border:0;padding:0;border-radius:1.25cqw;background:linear-gradient(180deg,#17181b,var(--cap));box-shadow:0 0 0 .16cqw var(--rim),0 .5cqw .7cqw rgba(0,0,0,.6),inset 0 .12cqw 0 rgba(255,255,255,.07);color:var(--ink);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:transform .04s,box-shadow .04s}
#plate .key:hover{box-shadow:0 0 0 .16cqw #4a4e57,0 .5cqw .7cqw rgba(0,0,0,.6),inset 0 .12cqw 0 rgba(255,255,255,.1)}
#plate .key.down{transform:translate(-50%,-50%) translateY(.35cqw);box-shadow:0 0 0 .16cqw #6c717c,0 .1cqw .2cqw rgba(0,0,0,.6),inset 0 0 1cqw rgba(255,255,255,.1)}
#plate .key svg{width:68%;height:68%;fill:none;stroke:currentColor;stroke-width:5.6;stroke-linecap:round;stroke-linejoin:round;pointer-events:none}
#plate .key .ch{font:600 2.55cqw/1 ui-rounded,"SF Pro Rounded","Nunito",system-ui,sans-serif;pointer-events:none}
#plate .key .ch.small{font-size:1.8cqw;font-weight:700}
#plate .key.step{border-radius:.9cqw;background:linear-gradient(180deg,rgba(255,255,255,.17),rgba(255,255,255,.06) 55%,rgba(255,255,255,.12));box-shadow:0 0 0 .2cqw #3a3d44,0 .5cqw .7cqw rgba(0,0,0,.6),inset 0 .15cqw .5cqw rgba(255,255,255,.18),inset 0 -.8cqw 1cqw rgba(0,0,0,.35)}
#plate .key.step .led{width:.75cqw;height:.75cqw;border-radius:50%;background:#3a3d44;box-shadow:0 0 0 .22cqw #0a0a0b;transition:background .05s}
#plate .key.step.lit .led{background:#fff4d6;box-shadow:0 0 0 .22cqw #0a0a0b,0 0 1.8cqw .7cqw #ffc04d}
#plate .key.step.lit{background:linear-gradient(180deg,rgba(255,226,160,.42),rgba(255,200,110,.2) 55%,rgba(255,226,160,.3))}
#plate .key.dead{cursor:default;opacity:.8}
#plate .lab{font:600 1.2cqw/1 ui-rounded,"SF Pro Rounded","Nunito",system-ui,sans-serif;letter-spacing:.08em;color:var(--ink);white-space:nowrap;pointer-events:none}
#plate .lab.big{font-size:1.25cqw;font-weight:700;letter-spacing:.06em}
#plate .tri{border:0;background:none;padding:0;color:var(--ink);cursor:pointer;display:flex;align-items:center;justify-content:center;width:3cqw;height:3cqw}
#plate .tri svg{width:1.35cqw;height:1.35cqw} #plate .tri:hover{color:#fff} #plate .tri.dead{cursor:default;color:var(--ink2)}
#plate .screw{border-radius:50%;background:radial-gradient(circle at 40% 35%,#3a3d44,#1b1c1f 70%);box-shadow:0 0 0 .14cqw #0a0b0c,inset 0 0 0 .22cqw #0c0d0e;width:1.4cqw}
#plate .screw::after{content:"";position:absolute;left:25%;right:25%;top:45%;height:10%;background:#0a0a0a;border-radius:1px}
#plate .bar{display:flex;flex-direction:column;justify-content:space-between;align-items:center}
#plate .bar i{display:block;width:.9cqw;height:.55cqw;border-radius:.15cqw;background:#2a2d33}
#plate .bar i:nth-child(-n+3).on{background:#ff5b4a;box-shadow:0 0 .8cqw #ff5b4a} #plate .bar i:nth-child(n+4):nth-child(-n+6).on{background:#ffd24a;box-shadow:0 0 .8cqw #ffd24a} #plate .bar i:nth-child(n+7).on{background:#46d98f;box-shadow:0 0 .8cqw #46d98f}
#plate .jack{font:700 1.2cqw ui-rounded,system-ui,sans-serif;color:var(--ink);display:flex;align-items:center;justify-content:center;writing-mode:vertical-rl;letter-spacing:.1em;background:#101113;border-radius:.7cqw;box-shadow:0 0 0 .14cqw #2d3036}
#plate .jack.l{transform:translate(-50%,-50%) rotate(180deg)}
#plate .bezel{background:#05070b;border-radius:.7cqw;box-shadow:0 0 0 .2cqw #2d3036,inset 0 0 1cqw #000;padding:0;display:flex}
#plate .bezel canvas{width:100%;height:100%;display:block;border-radius:.45cqw;background:#000;image-rendering:auto}
#plate .enc{border-radius:50%;border:.38cqw solid #f1f2f4;background:#0b0c0d;box-shadow:0 .45cqw .8cqw rgba(0,0,0,.7),inset 0 0 0 .22cqw #000;cursor:ns-resize;display:flex;align-items:center;justify-content:center;outline:none}
#plate .enc:focus-visible{box-shadow:0 0 0 .3cqw var(--accent),0 .45cqw .8cqw rgba(0,0,0,.7)}
#plate .enc .cap{width:62%;height:62%;border-radius:50%;background:radial-gradient(circle at 38% 30%,#34363b,#141517 62%,#050506);box-shadow:0 .25cqw .5cqw rgba(0,0,0,.8),inset 0 .1cqw .2cqw rgba(255,255,255,.15);display:block;position:relative}
#plate .enc .cap u{position:absolute;left:46%;top:9%;width:8%;height:24%;background:#d8dbe0;border-radius:99px;text-decoration:none;opacity:.85}
#plate .enc.down{border-color:#fff}
#panelKeysHelp{max-width:min(100%,1180px);color:var(--muted);font-size:12px;line-height:1.9;text-align:center}
#panelKeysHelp b{color:var(--fg)}
#panelHint{min-height:20px;color:var(--muted);font-size:13px;text-align:center}
@media (max-width:640px){ .pane.on{padding:8px} }

/* the Learn tab: a lesson beside the real panel */
#lesson{display:none;flex:0 0 340px;align-self:stretch;min-height:0;overflow:auto;background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:16px 18px;line-height:1.5}
body.learning #lesson{display:block}
#lesson h2{font-size:18px;margin:0 0 4px}
#lesson .kicker{font-size:12px;color:var(--muted);letter-spacing:.04em;text-transform:uppercase}
#lesson .say{font-size:17px;font-weight:600;margin:14px 0 6px}
#lesson .why{color:var(--muted);margin:0 0 12px}
#lesson .hint{border-left:3px solid var(--accent);padding:6px 10px;margin:0 0 12px;background:var(--panel2);border-radius:0 6px 6px 0}
#lesson .dots{display:flex;gap:6px;margin:12px 0 0}
#lesson .dots i{flex:1;max-width:22px;height:5px;border-radius:3px;background:var(--line)}
#lesson .dots i.done{background:var(--a)}
#lesson .dots i.now{background:var(--accent)}
#lesson .row{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}
#lesson ol{list-style:none;margin:14px 0 0;padding:0;display:flex;flex-direction:column;gap:6px}
#lesson li button{width:100%;text-align:left;display:flex;justify-content:space-between;gap:10px}
#lesson li button:disabled{opacity:.5;cursor:default}
#lesson li .tick{color:var(--a)}
#lesson .next{margin-top:2px}
#lesson .note{color:var(--muted);font-size:13px;margin:10px 0 0}
@media (max-width:1000px){#tab-panel{flex-direction:column;overflow:auto}#lesson{flex:none;max-height:34vh}body.learning #panelWrap{flex:none;overflow:visible}}
#plate .coach{outline:.45cqw solid var(--accent);outline-offset:.35cqw;animation:coach 1.1s ease-in-out infinite}
@keyframes coach{50%{outline-color:transparent}}
@media (prefers-reduced-motion:reduce){#plate .coach{animation:none}}