:root{--bg:#f3f6f8;--paper:#ffffff;--ink:#1b2836;--mute:#5d6b78;--line:#d5dee6;--accent:#1f4e6b;--accent2:#1f4e6b;
--ok:#2e7d4f;--warn:#b7791f;--bad:#c23b3b;--bad-bg:#fdeceb;--roll:#e7eef3;--note:#1f4e6b;--now:#e4b15a;
/* red (--bad) is for the MICROPHONE only (and the record button). Singing is never red: the voice line is violet,
   a note still to practise is a calm slate (--try), a faint or short one is simply muted. */
--me:#7b5ea7;--try:#7d8fa3;
--dock:#1b2836;--dock-ink:#f3f6f8;
--safe-b:env(safe-area-inset-bottom,0px)}
@media (prefers-color-scheme:dark){:root{--bg:#12181f;--paper:#1b242e;--ink:#e7eef3;--mute:#9aabba;--line:#2c3946;--accent:#8eb4cc;
--accent2:#8eb4cc;--roll:#1b242e;--note:#8eb4cc;--now:#e4b15a;--me:#b9a3e3;--try:#93a4b6;--bad:#ef7b7b;--bad-bg:#3b1f22}}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;height:100%;background:var(--bg);color:var(--ink);font:17px/1.5 Assistant,system-ui,sans-serif;overscroll-behavior:none}
body{display:flex;flex-direction:column}
#app{flex:1;min-height:0;overflow:auto}
button{font:inherit;color:inherit;cursor:pointer;border:0;background:none}
.screen{display:flex;flex-direction:column;min-height:100%;max-width:560px;margin:0 auto}
header.bar{position:sticky;top:0;z-index:5;display:flex;align-items:center;gap:8px;padding:calc(10px + env(safe-area-inset-top,0px)) 14px 10px;background:var(--paper);border-bottom:1px solid var(--line)}
header.bar h1{font:700 19px Assistant;margin:0;flex:1;color:var(--accent);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.iconbtn{min-width:44px;min-height:44px;border-radius:12px;font-size:20px}
.list{padding:12px 14px 30px;display:flex;flex-direction:column;gap:10px}
.card{display:flex;align-items:center;gap:12px;padding:14px 16px;background:var(--paper);border:1px solid var(--line);border-radius:16px;text-align:right;width:100%}
.card .t{font:700 20px "Frank Ruhl Libre",serif}
.card .s{font-size:14px;color:var(--mute)}
.card .grow{flex:1}
.stars{color:var(--now);letter-spacing:2px;font-size:16px}
.note-msg{margin:12px 14px;padding:12px 14px;border-radius:14px;background:var(--paper);border:1px solid var(--line);font-size:15px;color:var(--mute)}
.note-msg.warn{border-color:var(--warn);color:var(--ink)}
.note-msg.mic{border:2px solid var(--bad);background:var(--bad-bg);color:var(--ink);font-weight:600;text-align:right;margin:0 0 8px;width:100%}
.note-msg.mic b{color:var(--bad)}
.micname{margin-top:4px;font-size:13px;font-weight:400;color:var(--mute)}
/* practice */
.practice{flex:1;display:flex;flex-direction:column;padding:10px 14px 0}
.line{font:700 26px/1.45 "Frank Ruhl Libre",serif;color:var(--ink);text-align:center;min-height:34px}
.pron{text-align:center;min-height:22px;font-size:15px;color:var(--mute)}
.h-title{text-align:center;font:700 15px Assistant;color:var(--accent);min-height:22px}
.hear{min-height:100%}
.parts{display:flex;gap:6px;overflow-x:auto;padding:12px 16px 2px;scrollbar-width:none}
.parts::-webkit-scrollbar{display:none}
.parts button{flex:0 0 auto;padding:7px 12px;border-radius:999px;color:var(--mute);font-size:14px;background:transparent}
.parts button.on{background:var(--accent);color:#fff}
.reading{margin:10px 16px 0;padding:22px 18px 16px;background:var(--paper);border-radius:22px;flex:1;display:flex;flex-direction:column;justify-content:center}
.reading .line{font-size:28px}
.reading .kar{min-height:0;padding:10px 0 0}
.home-open{width:calc(100% - 32px);margin:18px auto 0;border:0;text-align:center;cursor:pointer}
.transport{display:flex;align-items:center;justify-content:center;gap:22px;padding:16px 16px 6px}
.transport .play{width:76px;height:76px;border-radius:50%;background:var(--accent);color:#fff;font:700 16px Assistant}
.transport .step{width:48px;height:48px;border-radius:50%;background:var(--paper);border:1px solid var(--line);font-size:20px}
.transport .step:disabled{opacity:.3}
.quiet{display:block;width:100%;text-align:center;color:var(--mute);font-size:14px;padding:6px 16px calc(14px + var(--safe-b))}
.kar{display:flex;flex-wrap:wrap;justify-content:center;gap:4px 10px;padding:14px 4px;min-height:96px;align-items:flex-end}
.kar span{font:700 22px/1.35 "Frank Ruhl Libre",serif;padding:0 3px;border-radius:8px;transition:background .1s,color .1s}
.kar span.now{background:var(--now);color:#1b2836}
.kar span.ok{color:var(--ok)} .kar span.off{color:var(--try)} .kar span.miss{color:var(--mute);opacity:.8}
canvas.roll{width:100%;height:170px;background:var(--roll);border-radius:16px;touch-action:pan-y}
.fb{max-width:100%;min-width:0;min-height:64px;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:8px;text-align:center}
.fb .stars{font-size:28px}
.fb .tip{font-size:16px}
.controls{position:sticky;bottom:0;background:linear-gradient(transparent,var(--bg) 18%);padding:10px 14px calc(14px + var(--safe-b))}
.row{display:flex;align-items:center;justify-content:space-between;gap:10px}
.rec{width:88px;height:88px;border-radius:50%;background:var(--bad);color:#fff;font:700 15px Assistant;box-shadow:0 4px 14px rgba(192,57,43,.35)}
.rec.on{animation:pulse 1s infinite}
@keyframes pulse{50%{transform:scale(.93)}}
.side{display:flex;flex-direction:column;align-items:center;gap:2px;min-width:72px;padding:8px;border-radius:14px;background:var(--paper);border:1px solid var(--line);font-size:13px}
.side .i{font-size:24px}
.side:disabled{opacity:.4}
.nav{margin-top:10px;font-size:15px;color:var(--mute)}
.nav button{padding:8px 12px;border-radius:10px;border:1px solid var(--line);background:var(--paper)}
.sheet{position:fixed;inset:0;background:rgba(0,0,0,.4);display:flex;align-items:flex-end;z-index:40}
.sheet .in{background:var(--paper);width:100%;max-width:560px;margin:0 auto;border-radius:20px 20px 0 0;padding:18px 18px calc(20px + var(--safe-b))}
.sheet h2{margin:0 0 8px;font:700 20px Assistant;color:var(--accent)}
.sheet label{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:12px 0;border-bottom:1px solid var(--line)}
.btn{display:block;width:100%;padding:14px;border-radius:14px;background:var(--accent);color:#fff;font:700 17px Assistant;margin-top:14px}
.btn.ghost{background:transparent;color:var(--accent);border:1px solid var(--line)}
.card.next{border-color:var(--accent)}
.card.slot{align-items:stretch}
.card .link{display:block;flex:1;text-align:right;padding:0}
.side-col{display:flex;flex-direction:column;align-items:flex-end;justify-content:center;gap:6px}
.textbtn{font-size:13px;color:var(--accent);padding:4px 0}
.stepper{display:flex;align-items:center;gap:8px}
.stepper button{width:40px;height:40px;border-radius:10px;border:1px solid var(--line);font-size:20px}
.diag{margin-top:6px;font-size:12px;color:var(--mute);overflow-wrap:anywhere;max-width:100%}
.nav #mid button{padding:8px 12px;border-radius:10px;border:1px solid var(--line);background:var(--paper);font-size:14px}
.sheet select{max-width:55%;font:inherit;font-size:14px;padding:6px;border-radius:8px;border:1px solid var(--line);background:var(--bg);color:var(--ink)}
/* the teacher */
.lesson{margin:4px 0 8px;padding:12px;border-radius:16px;background:var(--paper);border:1px solid var(--line)}
.lesson .ltext{font-size:16px;line-height:1.55;margin-bottom:8px}
.lesson .lrow{display:flex;gap:8px;margin-top:8px}
.lbtn{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;padding:10px 6px;border-radius:12px;border:1px solid var(--line);background:var(--bg);font-size:14px}
.lbtn .i{font-size:20px}
.lbtn.playing{border-color:var(--now);background:var(--now);color:#1b2836}
.lesson .lhead{font-weight:700;font-size:15px;margin-bottom:6px}
.spots{display:flex;flex-wrap:wrap;gap:6px}
.spot{display:flex;flex-direction:column;align-items:center;min-width:58px;padding:6px 10px;border-radius:12px;border:1px solid var(--line);background:var(--bg)}
.spot b{font:700 20px "Frank Ruhl Libre",serif}
.spot small{font-size:12px;color:var(--mute)}
.spot.off b{color:var(--try)} .spot.faint b{color:var(--mute)}
.spot.sel{border:2px solid var(--accent);background:var(--paper)}
#spotBody{margin-top:10px}
.kar span.pick{outline:2px solid var(--accent);outline-offset:2px}
.spot.short b{color:var(--mute)}
.stages{display:flex;gap:6px;margin-bottom:8px}
.stages button{flex:1;padding:8px 4px;border-radius:10px;border:1px solid var(--line);background:var(--paper);font-size:13px;color:var(--mute)}
.stages button.on{border-color:var(--accent);color:var(--ink);font-weight:700;background:var(--bg)}
body:has(.practice-screen) #app{display:flex;flex-direction:column;overflow:hidden}
.practice-screen{flex:1;height:auto;min-height:0;overflow:hidden}
.practice-screen .practice{flex:1;min-height:0;overflow:auto;padding-bottom:4px}
.practice-screen .practice>*{flex-shrink:0}
.practice-screen .where{text-align:center;color:var(--mute);font-size:14px}
.practice-screen .line{font-size:22px;min-height:0}
.practice-screen .kar{min-height:0;padding:6px 4px}
.practice-screen canvas.roll{height:72px;flex:none}
.practice-screen .controls{position:static;flex:none;background:var(--bg);border-top:1px solid var(--line);padding:8px 12px calc(10px + var(--safe-b))}
.practice-screen .fb{min-height:0;padding:0 2px 6px}
.practice-screen .fb .tip{font-size:14px;line-height:1.35}
.practice-screen .stages{margin-bottom:6px}
.practice-screen .stages button{padding:6px 2px;font-size:12px;line-height:1.2}
.practice-screen .rec{width:72px;height:72px}
.practice-screen .side{min-width:0;flex:1;max-width:108px;padding:6px 4px;font-size:12px;line-height:1.2}
.practice-screen .nav{margin-top:6px}
.practice-screen .nav button{font-size:14px}
#chrome{flex:none;z-index:30;background:var(--dock);color:var(--dock-ink);padding-bottom:var(--safe-b)}
#chrome[hidden]{display:none}
#dock{display:flex;align-items:center;gap:8px;padding:8px 10px 0}
#dock[hidden]{display:none}
.dock-main{flex:1;min-width:0;text-align:right;padding:6px 8px}
.dock-title{display:block;font:700 15px Assistant;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.dock-sub{display:block;font-size:13px;opacity:.75}
.dock-go{flex:0 0 auto;min-width:64px;padding:8px 14px;border-radius:999px;background:#2a3d4f;color:var(--dock-ink);font:700 14px Assistant}
.dock-step{flex:0 0 auto;width:40px;height:40px;border-radius:50%;color:var(--dock-ink);font-size:18px}
.dock-step:disabled{opacity:.35}
button.shelf{display:block;width:100%;text-align:right;padding:12px 4px 4px}
button.shelf.sub{padding:8px 18px 2px;color:var(--ink);font-weight:600}
button.shelf.deep{padding-right:34px;font-weight:500}
.shelf.sub{margin:8px 18px 2px;color:var(--ink)}
#tabs{display:flex}
#tabs button{flex:1;padding:12px 8px 14px;color:var(--dock-ink);opacity:.55;font:600 15px Assistant}
#tabs button.on{opacity:1;color:var(--now)}
.datechip{display:block;width:calc(100% - 28px);margin:14px auto 0;padding:12px 16px;border-radius:16px;background:var(--paper);border:1px solid var(--line);text-align:right}
.datechip b{display:block;font:700 18px "Frank Ruhl Libre",serif}
.datechip span{font-size:14px;color:var(--accent)}
.shelf{margin:16px 4px 2px;font:700 13px Assistant;color:var(--mute)}
.rowline{display:flex;align-items:center;gap:12px;width:100%;padding:14px 4px;border-bottom:1px solid var(--line);text-align:right;background:transparent}
.rowline .grow{flex:1;min-width:0}
.rowline .t{font:700 18px "Frank Ruhl Libre",serif}
.rowline .s{font-size:13px;color:var(--mute)}
.rowline.ready .t{color:var(--ink)}
.rowline.wait{color:var(--mute)}
.rowline.wait .t{font-weight:500}
.more{display:block;width:calc(100% - 28px);margin:8px auto 0;padding:12px;border-radius:14px;color:var(--accent);font:600 15px Assistant}
.rungnote{font-size:13px;line-height:1.35;color:var(--mute);text-align:center;margin:0 0 6px}
.rungnote .missing{color:var(--ink)}
.credit{font-size:12px;color:var(--mute);text-align:center;margin-top:2px}
.hear .credit{padding:6px 16px 0}
.nudge{font-size:14px;color:var(--ink);margin-top:4px}
.nudge .textbtn{font-weight:700;margin-inline-start:6px}
.keyrow{padding:12px 0;border-bottom:1px solid var(--line)}
.keyhead{margin-bottom:8px}
.keyrow .stepper{justify-content:space-between}
.keyrow .stepper button{width:auto;padding:0 12px;font-size:15px}
.keydots{letter-spacing:3px;color:var(--accent);font-size:14px}
.practice-screen .stages button{min-height:40px}