:root{--ink:#1d2433;--muted:#667085;--line:#e3e6ec;--bg:#f5f6f8;--card:#fff;--brand:#1f4e78;--good:#2e8b57;--bad:#c0392b;--part:#d98c1f}
*{box-sizing:border-box}
body{margin:0;font:16px/1.55 system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;color:var(--ink);background:var(--bg)}
a{color:var(--brand)}
header.top{background:var(--brand);color:#fff;display:flex;flex-wrap:wrap;align-items:center;gap:8px 20px;padding:10px 20px}
header.top a{color:#fff;text-decoration:none}
.brand{font-weight:700;font-size:18px;margin-right:auto}
header nav{display:flex;flex-wrap:wrap;gap:4px 16px}
header nav a{opacity:.9}header nav a:hover{opacity:1;text-decoration:underline}
main{max-width:1150px;margin:0 auto;padding:20px 16px 40px}
.narrow{max-width:460px;margin:0 auto}
footer{text-align:center;color:var(--muted);font-size:13px;padding:20px}
h1{font-size:26px;margin:.2em 0 .5em}h2{font-size:20px;margin:.2em 0 .6em}h3{font-size:16px;margin:1em 0 .3em}
.muted{color:var(--muted)}.small{font-size:13px}.nowrap{white-space:nowrap}
.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:16px 18px;margin-bottom:16px}
.grid4{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px}
.grid3{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px}
.two{display:grid;grid-template-columns:minmax(260px,1fr) 2fr;gap:16px;align-items:start}
@media(max-width:800px){.two{grid-template-columns:1fr}}
a.card.session{display:block;color:inherit;text-decoration:none;transition:box-shadow .15s}
a.card.session:hover{box-shadow:0 4px 14px rgba(0,0,0,.08)}
.card.session h3{margin:.4em 0}
.chip{display:inline-block;padding:2px 10px;border-radius:99px;font-size:13px;font-weight:600;color:#1d2433;border:1px solid rgba(0,0,0,.08)}
h1 .chip{font-size:15px;vertical-align:middle}
.status{display:inline-block;padding:1px 8px;border-radius:99px;font-size:12px;font-weight:600;background:#eef0f3;color:#475467}
.status.done{background:#d9f2e3;color:#1e6b40}.status.revise{background:#fde2d9;color:#9a3412}.status.in_progress{background:#fff1c7;color:#8a5a00}
.stats{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:18px}
.stat{background:#fff;border:1px solid var(--line);border-radius:10px;padding:10px 16px;min-width:150px}
.stat b{display:block;font-size:24px}.stat span{color:var(--muted);font-size:13px}
.stat.good b{color:var(--good)}.stat.bad b{color:var(--bad)}
.flash{padding:10px 14px;border-radius:8px;margin-bottom:14px;background:#e6f4ec;border:1px solid #b9e0c9}
.flash.err{background:#fdecea;border-color:#f5c2bc}
.btn{display:inline-block;background:var(--brand);color:#fff;border:0;border-radius:8px;padding:9px 16px;font:inherit;font-weight:600;cursor:pointer;text-decoration:none}
.btn.secondary{background:#e8eef5;color:var(--brand)}.btn.big{padding:12px 24px;font-size:17px}
button.link{background:none;border:0;color:var(--bad);cursor:pointer;font:inherit;padding:0 4px}
.form label{display:block;margin-bottom:12px;font-weight:600;font-size:14px}
input,select,textarea{font:inherit;padding:8px 10px;border:1px solid #cfd4dc;border-radius:7px;background:#fff;width:100%;margin-top:4px}
input[type=radio],input[type=checkbox]{width:auto;margin:0 6px 0 0}
textarea.mono{font-family:ui-monospace,Consolas,monospace;font-size:14px}
form.inline{display:inline-flex;flex-wrap:wrap;gap:8px;align-items:end}form.inline label{font-weight:600;font-size:14px}
form.inline input{width:auto}
.row{display:flex;gap:10px}.row label{flex:1}
table.list,table.tt,table.md{width:100%;border-collapse:collapse}
table.list td,table.list th,table.md td,table.md th{padding:8px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
table.md th{background:#f0f3f7}
.tablewrap{overflow-x:auto}
table.tt td,table.tt th{padding:8px;border:1px solid #fff;vertical-align:top;font-size:14px}
table.tt th{background:var(--brand);color:#fff}
table.tt td a{color:inherit;text-decoration:none}
table.tt td.free{background:#f2f2f2;color:#8a8a8a;font-style:italic;text-align:center;vertical-align:middle}
table.tt tr.today td{outline:3px solid var(--part);outline-offset:-3px}
.bar{background:#eef0f3;border-radius:99px;height:10px;overflow:hidden}
.bar span{display:block;height:100%}.bar .good{background:var(--good)}.bar .bad{background:var(--bad)}
.notes h2{margin-top:0}.notes h3{border-bottom:1px solid var(--line);padding-bottom:4px;margin-top:1.4em}
.notes h4{margin:1em 0 .3em}
.callout{background:#f3f7fc;border-left:4px solid var(--brand);padding:8px 12px;border-radius:0 6px 6px 0;margin:10px 0}
code{background:#f0f2f5;padding:1px 5px;border-radius:4px;font-size:.92em}
pre{background:#f6f8fa;padding:10px;border-radius:8px;overflow:auto}
ul.ticks{padding-left:18px;margin:.2em 0}
.crumbs{font-size:14px;margin-bottom:6px;color:var(--muted)}
.question .qhead{margin-bottom:4px}.question .prompt p{margin:.2em 0 .6em}
.opt{display:block;padding:6px 8px;border-radius:6px;cursor:pointer;font-weight:400}
.opt:hover{background:#f3f5f8}
input.num{width:160px}input.wide{max-width:560px}
.question.good{border-left:5px solid var(--good)}.question.part{border-left:5px solid var(--part)}.question.bad{border-left:5px solid var(--bad)}
.mark{font-weight:700}
.pager{display:flex;justify-content:space-between;margin-top:10px}
.card.remember{background:#fffbea;border-color:#f3dc8a}
.card.remember h2{color:#8a5a00}
.card.remember ul{margin:.2em 0;padding-left:20px}
@media print{header.top,footer,.noprint,form{display:none}.card{break-inside:avoid;border:1px solid #ccc}body{background:#fff}}
.fun{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:12px;margin-bottom:14px}
.funbox{background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px 16px;display:flex;flex-direction:column;gap:4px;color:inherit;text-decoration:none}
a.funbox:hover{box-shadow:0 4px 14px rgba(0,0,0,.08)}
.funbox .big{font-size:26px;font-weight:800;line-height:1.1}
.funbox.level{background:linear-gradient(135deg,#fff8e1,#fff)}
.funbox.streak{background:linear-gradient(135deg,#ffece0,#fff)}.funbox.streak.risk{border-color:var(--part);box-shadow:0 0 0 2px #f6d7a8 inset}
.funbox.boss{background:linear-gradient(135deg,#ece9ff,#fff)}
.card.warmup{display:flex;flex-wrap:wrap;gap:10px 16px;align-items:center;background:#f3faf5;border-color:#cfe9d8}
.card.warmup .prizeline{margin-left:auto}
.badges{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px}
.badge{background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px;text-align:center}
.badge .ico{font-size:34px;display:block}.badge.locked{opacity:.45;filter:grayscale(1)}
.prize td.ok{color:var(--good);font-weight:700}.prize td.no{color:var(--bad);font-weight:700}
.prizebanner{background:linear-gradient(135deg,#1f4e78,#2e8b57);color:#fff;border-radius:14px;padding:18px 22px;margin-bottom:16px}
.prizebanner .big{font-size:30px;font-weight:800}
.subjgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:10px;margin-bottom:14px}
.subjcard{color:inherit;text-decoration:none;display:flex;flex-direction:column;gap:6px}.subjcard.on{box-shadow:0 0 0 3px #1f4e78 inset}
.qimg{display:block;max-width:100%;height:auto;margin:6px 0 10px;border:1px solid #eee;border-radius:6px;background:#fff}
.bankq .part{border-top:1px dashed var(--line);padding:8px 0 6px}
.bankq .part textarea{width:100%;max-width:760px}
.bankq .part.ok{border-left:4px solid var(--good);padding-left:8px}.bankq .part.bad{border-left:4px solid var(--bad);padding-left:8px}
.bankq .part.selfpart{border-left:4px solid #6c63ff;padding-left:8px}
.partlab{margin-bottom:4px}
.tag{display:inline-block;font-size:11px;font-weight:700;padding:1px 7px;border-radius:9px;vertical-align:middle}
.tag.auto{background:#e3f2e8;color:#1e6b3a}.tag.self{background:#ece9ff;color:#4b3fc4}
.scheme{background:#f7f7fb;border:1px solid #e3e3f0;border-radius:8px;padding:6px 12px;margin:6px 0}
.scheme p{margin:.3em 0}
.selfmark{display:inline-flex;gap:6px;align-items:center;margin-top:4px;font-weight:600}
.qscore{float:right;font-weight:800}
.scorebox .big{font-size:30px;font-weight:800}
.timer{font-weight:700;background:#eef4fb;padding:2px 8px;border-radius:8px}.timer.over{background:#fde8e8;color:var(--bad)}
.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:10px}
.btn.small{padding:4px 10px;font-size:13px}
.resp{white-space:pre-wrap}