:root{
  --bg1:#eef4ff; --bg2:#f1f5f9; --ink:#1f2937; --muted:#6b7280;
  --card:#ffffff; --line:#e5e7eb; --shadow:0 6px 22px rgba(31,41,55,.10);
  --green:#16a34a; --greenbg:#dcfce7; --red:#dc2626; --redbg:#fee2e2;
  --en:#1d4ed8; --enbg:#eff6ff; --accent:#4f46e5; --accent2:#0891b2;
  --warn:#b45309; --warnbg:#fef3c7; --pom:#e11d48; --pombg:#ffe4e6;
  --sayBg:#e0e7ff; --sayColor:#3730a3; --thBg:#eef2ff; --reviewFrom:#1e3a8a; --reviewTo:#0891b2;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);line-height:1.55;background:linear-gradient(160deg,var(--bg1),var(--bg2));min-height:100vh}
header.top{position:sticky;top:0;z-index:30;backdrop-filter:blur(8px);background:rgba(255,255,255,.86);border-bottom:1px solid var(--line);padding:10px 16px;display:flex;align-items:center;gap:12px}
header.top .logo{font-size:1.5rem}
header.top h1{font-size:1rem;margin:0;flex:0 0 auto}
header.top .bar{flex:1;height:10px;background:#e9e9f3;border-radius:99px;overflow:hidden;min-width:60px;max-width:280px}
header.top .bar>i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--accent),var(--green));transition:width .4s}
header.top .pct{font-size:.8rem;color:var(--muted);min-width:30px}
.hdr-right{margin-left:auto;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
header.top button.home{border:1px solid var(--line);background:#fff;border-radius:10px;padding:6px 12px;cursor:pointer;font-weight:600;font-family:inherit}
header.top .who{font-size:.85rem;color:var(--muted);font-weight:600}

.pomo{position:sticky;top:51px;z-index:25;border-bottom:1px solid var(--line);background:linear-gradient(90deg,#fff,#fff7f9);padding:8px 12px;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.pomo .clock{font-variant-numeric:tabular-nums;font-weight:800;font-size:1.5rem;letter-spacing:.5px;min-width:84px;text-align:center;padding:2px 10px;border-radius:12px;background:var(--pombg);color:var(--pom);border:1px solid #fecdd3}
.pomo.brk .clock{background:#dcfce7;color:#15803d;border-color:#bbf7d0}
.pomo .mode{font-weight:700;font-size:.9rem}
.pomo .mode small{display:block;color:var(--muted);font-weight:500;font-size:.74rem}
.pomo button{border:1px solid var(--line);background:#fff;border-radius:10px;padding:7px 12px;cursor:pointer;font-weight:700;font-family:inherit;font-size:.9rem}
.pomo button.go{background:var(--pom);color:#fff;border-color:var(--pom)}
.pomo button.go.paused{background:var(--green);border-color:var(--green)}
.pomo .sel{border:1px solid var(--line);border-radius:10px;padding:6px 8px;font-family:inherit;font-size:.85rem;background:#fff}
.pomo .stats{margin-left:auto;display:flex;gap:8px;align-items:center;flex-wrap:wrap;font-size:.82rem;color:var(--muted)}
.pomo .chip{background:#fff;border:1px solid var(--line);border-radius:99px;padding:3px 10px;font-weight:600}
.pomo .goal{display:flex;align-items:center;gap:6px}.pomo .goal b{color:var(--ink)}
.pomo .goal .tick{display:inline-flex;width:20px;height:20px;border-radius:99px;border:2px solid var(--line);align-items:center;justify-content:center;font-size:.8rem;color:#fff}
.pomo .goal .tick.on{background:var(--green);border-color:var(--green)}
@media(max-width:620px){.pomo .stats{width:100%;margin-left:0}}

.wrap{max-width:900px;margin:0 auto;padding:18px 16px 90px}
h2{margin:.2em 0 .1em;font-size:1.5rem}
.sub{color:var(--muted);margin:0 0 14px}
.panel{background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px 18px;box-shadow:var(--shadow);margin-bottom:16px}
.panel h3{margin:.1em 0 .5em}
.how{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:10px}
.how .step{border:1px solid var(--line);border-radius:12px;padding:10px 12px;background:#fbfdff}
.how .step b{display:block;color:var(--accent)}
.tip{background:var(--warnbg);border:1px solid #fde68a;color:#7c4a02;border-radius:12px;padding:10px 14px;margin-top:12px;font-size:.95rem}
.review{display:flex;align-items:center;gap:14px;flex-wrap:wrap;background:linear-gradient(135deg,var(--reviewFrom),var(--reviewTo));color:#fff;border:none}
.review h3{margin:0;color:#fff}.review p{margin:.2em 0 0;opacity:.92;font-size:.9rem}
.review .rbtn{margin-left:auto;border:none;border-radius:12px;padding:12px 18px;font-weight:800;cursor:pointer;font-family:inherit;font-size:1rem;background:#fff;color:#0f3a66}
.review .rbtn.dim{opacity:.55;cursor:default}
.review .big{font-size:2rem;font-weight:900;background:rgba(255,255,255,.18);border-radius:12px;padding:6px 14px}

.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px}
.mod{position:relative;text-align:left;cursor:pointer;border:none;border-radius:16px;padding:16px;color:#fff;box-shadow:var(--shadow);transition:transform .12s;font-family:inherit}
.mod:hover{transform:translateY(-3px)}
.mod .ic{font-size:2rem}.mod h3{margin:.25em 0 .15em;font-size:1.18rem}
.mod .en{font-size:.86rem;opacity:.92}
.mod .meta{margin-top:10px;font-size:.8rem;opacity:.95;display:flex;justify-content:space-between;align-items:center}
.mod .done{position:absolute;top:12px;right:12px;background:#fff;color:var(--green);border-radius:99px;width:26px;height:26px;display:none;align-items:center;justify-content:center;font-weight:800}
.mod.complete .done{display:flex}
.mod .tag{position:absolute;top:12px;right:12px;background:rgba(255,255,255,.25);border-radius:99px;padding:2px 9px;font-size:.7rem;font-weight:700}

.toolbar{display:flex;gap:10px;flex-wrap:wrap;margin:6px 0 16px}
.toolbar .tb{border:1px solid var(--line);background:#fff;border-radius:12px;padding:10px 14px;font-weight:700;cursor:pointer;font-family:inherit;font-size:.95rem}
.toolbar .tb.ai{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;border:none}

.card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px 22px;box-shadow:var(--shadow)}
.card h3{margin:.1em 0 .5em;font-size:1.32rem}
.crumb{display:flex;align-items:center;gap:10px;margin-bottom:10px;flex-wrap:wrap}
.crumb .pill{background:#fff;border:1px solid var(--line);border-radius:99px;padding:4px 12px;font-size:.82rem;color:var(--muted)}
.lessonbar{height:8px;background:#eee;border-radius:99px;overflow:hidden;margin:4px 0 16px}
.lessonbar>i{display:block;height:100%;background:var(--accent);width:0;transition:width .3s}
.en-note{background:var(--enbg);border-left:4px solid var(--en);padding:9px 13px;border-radius:8px;margin:12px 0;font-size:.97rem}.en-note b{color:var(--en)}
.hr-ex{background:#f7f7fb;border:1px solid var(--line);border-radius:10px;padding:8px 12px;margin:8px 0}
.trick{background:var(--greenbg);border:1px solid #bbf7d0;border-radius:10px;padding:10px 13px;margin:12px 0}.trick b{color:var(--green)}
.diag{background:#f5f3ff;border:1px solid #ddd6fe;border-radius:10px;padding:10px 13px;margin:12px 0;font-size:.95rem}.diag b{color:#6d28d9}
table.tbl{width:100%;border-collapse:collapse;margin:10px 0;font-size:.95rem}
table.tbl th,table.tbl td{border:1px solid var(--line);padding:7px 9px;text-align:left;vertical-align:top}
table.tbl th{background:var(--thBg)}
.say{border:none;background:var(--sayBg);color:var(--sayColor);border-radius:8px;padding:1px 7px;cursor:pointer;font-size:.95rem;margin-left:4px}
.navbtns{display:flex;gap:10px;margin-top:18px}
.btn{flex:1;border:none;border-radius:12px;padding:13px 16px;font-size:1rem;font-weight:700;cursor:pointer;font-family:inherit}
.btn.primary{background:var(--accent);color:#fff}.btn.ghost{background:#fff;border:1px solid var(--line);color:var(--ink);flex:0 0 auto}
.btn:disabled{opacity:.45;cursor:default}
.check{margin-top:16px;border:2px dashed #c7d2fe;background:#f5f8ff;border-radius:14px;padding:14px 16px}
.check .clab{font-weight:800;color:var(--accent);font-size:.9rem;text-transform:uppercase;letter-spacing:.4px;margin-bottom:2px}
.check .qtext{font-weight:600;margin:6px 0}.check .gate{margin-top:10px;font-size:.86rem;color:var(--muted)}
.opts{display:grid;gap:10px;margin:10px 0}
.opt{text-align:left;border:2px solid var(--line);background:#fff;border-radius:12px;padding:12px 14px;font-size:1.02rem;cursor:pointer;font-family:inherit}
.opt:hover:not(:disabled){border-color:var(--accent)}
.opt.correct{border-color:var(--green);background:var(--greenbg)}.opt.wrong{border-color:var(--red);background:var(--redbg)}.opt:disabled{cursor:default}
.fillrow{display:flex;gap:8px;margin:10px 0}
.fillrow input{flex:1;padding:12px 14px;border:2px solid var(--line);border-radius:12px;font-size:1.02rem;font-family:inherit}
.fb{border-radius:12px;padding:11px 14px;margin-top:8px;display:none;font-size:.96rem}
.fb.ok{display:block;background:var(--greenbg);border:1px solid #bbf7d0}.fb.no{display:block;background:var(--redbg);border:1px solid #fecaca}
.fb b{display:block;margin-bottom:2px}
.result{text-align:center;padding:24px}.result .big{font-size:3rem;margin:6px 0}
.scorepill{display:inline-block;background:#fff;border:1px solid var(--line);border-radius:99px;padding:6px 16px;font-weight:700;margin:6px}
.reci{background:#fff7ed;border:1px dashed #fdba74;color:#9a3412;border-radius:10px;padding:9px 13px;margin:10px 0;font-size:.95rem}
footer.note{max-width:900px;margin:0 auto;padding:0 16px 30px;color:var(--muted);font-size:.8rem;text-align:center}

/* profile select */
.profiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-top:18px}
.pcard{cursor:pointer;border:1px solid var(--line);background:#fff;border-radius:20px;padding:26px 18px;text-align:center;box-shadow:var(--shadow);transition:transform .12s;font-family:inherit}
.pcard:hover{transform:translateY(-4px)}
.pcard .av{font-size:3.2rem}.pcard .nm{font-size:1.3rem;font-weight:800;margin-top:8px}
.pcard .role{color:var(--muted);font-size:.85rem;margin-top:2px}
.pcard.parent{background:linear-gradient(135deg,#0f172a,#334155);color:#fff;border:none}
.pcard.parent .role{color:#cbd5e1}

/* modal */
.modal{position:fixed;inset:0;background:rgba(15,23,42,.55);display:flex;align-items:center;justify-content:center;z-index:60;padding:16px;overflow-y:auto}
.modal .box{background:#fff;border-radius:18px;padding:22px;max-width:440px;width:100%;box-shadow:0 20px 60px rgba(0,0,0,.3);max-height:calc(100vh - 32px);max-height:calc(100dvh - 32px);overflow-y:auto;-webkit-overflow-scrolling:touch;margin:auto}
.modal h3{margin:.1em 0 .5em}
.modal input,.modal textarea,.modal select{width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:10px;font-family:inherit;font-size:1rem;margin:6px 0}
.modal textarea{min-height:90px;resize:vertical}
.modal .navbtns{position:sticky;bottom:-22px;background:#fff;border-top:1px solid var(--line);padding:10px 0 0;margin-top:10px;z-index:1}

/* parent */
.pcourse{margin-bottom:14px}
.pcourse .bar2{height:10px;background:#eee;border-radius:99px;overflow:hidden;margin:4px 0}
.pcourse .bar2>i{display:block;height:100%;background:var(--accent)}
.kvs{display:flex;gap:10px;flex-wrap:wrap;font-size:.82rem;color:var(--muted);margin-top:4px}
.kvs .kv{background:#f8fafc;border:1px solid var(--line);border-radius:99px;padding:3px 10px}
.danger{color:var(--red);border-color:#fecaca!important}
.muted{color:var(--muted)}
.zone{border:1px solid var(--line);border-radius:12px;padding:10px 12px;margin:8px 0;background:#fbfdff}
.zone .zlab{font-weight:700;color:var(--accent);font-size:.85rem;margin-bottom:4px}