:root{--bg:#f6f3ec;--card:#fff;--ink:#1f2a37;--muted:#667085;--dim:#98a2b3;--line:#e6e1d6;--accent:#2f7d6d;--accent-d:#256457;--warm:#e07a3f;--good:#2e9e6b;--warn:#c98a14;--bad:#c0392b;--piano:#4b7bec;--guitar:#e07a3f;--voice:#d6567f;--drums:#7c5cc4;--r:16px;--safe-b:env(safe-area-inset-bottom,0px);--safe-t:env(safe-area-inset-top,0px)}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;-webkit-text-size-adjust:100%}
body{min-height:100vh;min-height:100dvh}
button,input,textarea,select{font:inherit;color:inherit}
button{cursor:pointer}
h1,h2,h3{margin:0;line-height:1.25}h1{font-size:24px}h2{font-size:19px}h3{font-size:16.5px}
a{color:var(--accent-d)}
.muted{color:var(--muted)}.dim{color:var(--dim)}.small{font-size:14px}.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}.grow{flex:1;min-width:0}
.demo{position:sticky;top:0;z-index:30;background:#fff4d6;border-bottom:1px solid #f0d88a;color:#6b4e00;font-size:13.5px;padding:calc(var(--safe-t) + 6px) 12px 6px;display:flex;gap:10px;align-items:center;justify-content:center;flex-wrap:wrap;text-align:center}
.demo b{letter-spacing:.04em}.demo button{min-height:34px;padding:0 12px;border-radius:99px;border:1px solid #d9b94e;background:#fff;font-weight:700;font-size:13px}
.top{display:flex;align-items:center;gap:12px;padding:12px 16px;max-width:1100px;margin:0 auto}
.brand{font-weight:800;font-size:18px;display:flex;align-items:center;gap:8px}.brand i{width:28px;height:28px;border-radius:8px;background:var(--accent);display:inline-grid;place-items:center;color:#fff;font-style:normal;font-size:16px}
.top .who{margin-left:auto;text-align:right;line-height:1.2}.top .who small{display:block;color:var(--muted)}
.main{max-width:1100px;margin:0 auto;padding:6px 16px calc(96px + var(--safe-b))}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:16px;margin-bottom:14px;box-shadow:0 1px 2px rgba(16,24,40,.04)}
.card h2{margin-bottom:8px}.sect{font-size:13px;letter-spacing:.07em;text-transform:uppercase;color:var(--muted);font-weight:700;margin:18px 4px 8px}
.btn{min-height:48px;padding:0 20px;border-radius:14px;border:1px solid var(--line);background:#fff;font-weight:700;display:inline-flex;align-items:center;justify-content:center;gap:8px;text-decoration:none;color:var(--ink)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}.btn.primary:active{background:var(--accent-d)}
.btn.danger{color:var(--bad)}.btn.ghost{background:none;border-color:transparent;color:var(--accent-d)}.btn.sm{min-height:40px;padding:0 14px;font-size:15px}.btn.big{min-height:54px;width:100%;font-size:18px}.btn:disabled{opacity:.5}
.field,input[type=text],input[type=password],input[type=url],input[type=date],input[type=number],textarea,select{width:100%;min-height:48px;padding:10px 12px;border-radius:12px;border:1px solid #cfc9bb;background:#fff;font-size:16.5px}
textarea{resize:vertical;min-height:84px}
label.lab{display:block;font-weight:700;font-size:14px;margin:12px 0 4px;color:var(--muted)}
.pill{display:inline-block;padding:2px 10px;border-radius:99px;background:#eef2f0;color:var(--accent-d);font-size:12.5px;font-weight:700}
.pill.piano{background:#e7eefc;color:var(--piano)}.pill.guitar{background:#fdeee3;color:#b45a1f}.pill.voice{background:#fbe6ee;color:var(--voice)}.pill.drums{background:#eee9fa;color:var(--drums)}
.pill.good{background:#e1f5ec;color:#1d7a4f}.pill.warn{background:#fdf1d6;color:#8a5f00}.chk .t .pill{text-decoration:none;margin-left:4px;vertical-align:middle}.pill.k-song{background:#e1f0ea;color:#1d6b58}.pill.k-exercise{background:#e7eefc;color:#2f56b5}.pill.k-theory{background:#f1eafb;color:#6a45b0}
.bar{height:10px;border-radius:99px;background:#ebe7dc;overflow:hidden}.bar i{display:block;height:100%;background:var(--accent);border-radius:99px;transition:width .3s}
.login{min-height:100dvh;display:grid;place-items:center;padding:20px}.login .card{width:min(420px,100%);padding:26px}.login h1{margin-bottom:4px}.err{color:var(--bad);font-size:15px;min-height:22px}
.avatar{width:46px;height:46px;border-radius:50%;display:grid;place-items:center;color:#fff;font-weight:800;font-size:18px;flex:none}
.avatar.piano{background:var(--piano)}.avatar.guitar{background:var(--guitar)}.avatar.voice{background:var(--voice)}.avatar.drums{background:var(--drums)}
.slist{display:grid;gap:12px;grid-template-columns:repeat(auto-fill,minmax(300px,1fr))}
.scard{display:block;text-align:left;width:100%;background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:14px;box-shadow:0 1px 2px rgba(16,24,40,.04)}.scard:active{background:#faf8f3}
.scard .head{display:flex;gap:12px;align-items:center}.scard .meta{display:flex;gap:14px;flex-wrap:wrap;margin-top:10px;font-size:14px;color:var(--muted)}.scard .meta b{color:var(--ink)}
.badge{background:var(--bad);color:#fff;border-radius:99px;font-size:12px;font-weight:800;padding:2px 8px;margin-left:auto}
.tabs{display:flex;gap:6px;overflow-x:auto;padding:2px 0 10px;margin:0 -4px;-webkit-overflow-scrolling:touch}.tabs button{flex:none;min-height:44px;padding:0 16px;border-radius:99px;border:1px solid var(--line);background:#fff;font-weight:700;font-size:15px}.tabs button.on{background:var(--accent);border-color:var(--accent);color:#fff}
.nav{position:fixed;left:0;right:0;bottom:0;z-index:20;display:grid;grid-template-columns:repeat(5,1fr);background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-top:1px solid var(--line);padding:6px 6px calc(6px + var(--safe-b))}
.nav button{border:0;background:none;display:grid;justify-items:center;gap:1px;min-height:56px;border-radius:12px;color:var(--muted);font-size:12px;font-weight:700;position:relative}.nav button .ic{font-size:21px;line-height:1}.nav button.on{color:var(--accent-d);background:#eaf3f0}.nav .dot{position:absolute;top:4px;right:22%;background:var(--bad);color:#fff;border-radius:99px;font-size:10px;font-weight:800;padding:1px 6px}
.chk{display:flex;gap:12px;align-items:flex-start;padding:14px 4px;border-top:1px solid var(--line)}.chk:first-of-type{border-top:0}
.cb{flex:none;width:36px;height:36px;border-radius:10px;border:2px solid #b8b2a2;background:#fff;display:grid;place-items:center;font-size:22px;color:#fff;margin-top:1px}.cb.on{background:var(--good);border-color:var(--good)}
.chk .t{font-weight:700;line-height:1.35}.chk.done .t{color:var(--muted);text-decoration:line-through;text-decoration-color:#b8b2a2}.chk .links{display:flex;gap:8px;flex-wrap:wrap;margin:6px 0}.chk .links a{display:inline-flex;align-items:center;min-height:38px;padding:0 12px;border-radius:99px;border:1px solid var(--line);background:#faf8f3;font-size:14px;font-weight:700;text-decoration:none}
.chk .note{margin-top:6px;min-height:44px;font-size:15px}
.minbtns{display:flex;gap:8px;flex-wrap:wrap;margin:8px 0}.minbtns button{min-height:48px;min-width:64px;border-radius:14px;border:1px solid var(--line);background:#fff;font-weight:800;font-size:16px}.minbtns button:active{background:#eaf3f0}
.stat{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:10px;margin-bottom:14px}.stat>div{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:12px 14px}.stat b{display:block;font-size:26px;line-height:1.1}.stat span{color:var(--muted);font-size:13.5px}
.chart{width:100%;max-width:560px;height:auto;display:block;margin:0 auto}.chart text{font-size:11px;fill:var(--muted)}.chart .v{font-weight:700;fill:var(--ink)}
.seg{display:flex;gap:6px;flex-wrap:wrap}.seg button{min-height:44px;padding:0 12px;border-radius:12px;border:1px solid var(--line);background:#fff;font-weight:700;font-size:14.5px}.seg button.on{background:var(--accent);border-color:var(--accent);color:#fff}
.song{padding:12px 0;border-top:1px solid var(--line)}.song:first-child{border-top:0}
.msgs{display:grid;gap:8px;margin-bottom:12px}.msg{max-width:88%;padding:10px 14px;border-radius:16px;white-space:pre-wrap;overflow-wrap:anywhere}.msg small{display:block;color:var(--muted);font-size:12px;margin-top:2px}.msg.me{justify-self:end;background:#dff0ea;border-bottom-right-radius:4px}.msg.them{justify-self:start;background:#fff;border:1px solid var(--line);border-bottom-left-radius:4px}
.strip{display:grid;grid-template-columns:repeat(14,1fr);gap:4px}.strip i{aspect-ratio:1;border-radius:6px;background:#ebe7dc;display:block}.strip i.l1{background:#b9dccf}.strip i.l2{background:#6fb7a2}.strip i.l3{background:var(--accent)}
.sheet{position:fixed;inset:0;background:rgba(16,24,40,.5);z-index:50;display:grid;align-items:end}.sheet>div{background:var(--bg);border-radius:22px 22px 0 0;padding:18px 16px calc(24px + var(--safe-b));max-height:94dvh;overflow:auto;max-width:720px;width:100%;margin:0 auto}
@media(min-width:760px){.sheet{align-items:center}.sheet>div{border-radius:22px}}
.item-ed{border:1px solid var(--line);border-radius:14px;padding:12px;margin:10px 0;background:#fff}.item-ed .tools{display:flex;gap:6px;justify-content:flex-end;margin-top:6px}
#toast{position:fixed;left:50%;bottom:calc(86px + var(--safe-b));transform:translate(-50%,20px);background:#1f2a37;color:#fff;padding:12px 18px;border-radius:14px;font-weight:700;opacity:0;pointer-events:none;transition:.25s;z-index:80;max-width:90%;text-align:center}#toast.on{opacity:1;transform:translate(-50%,0)}
.two{display:grid;gap:14px}@media(min-width:900px){.two{grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);align-items:start}}
.fb{background:#f1f8f5;border:1px solid #cfe7de;border-radius:14px;padding:12px 14px;margin:10px 0}.fb b{color:var(--accent-d)}
.empty{text-align:center;color:var(--muted);padding:24px 8px}
.foot{color:var(--dim);font-size:12.5px;text-align:center;padding:10px 16px 0}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}