/* Hub app shell: grey frame, quiet sidebar, white rounded workspace (after the reference dashboards), TDI tokens */
:root{--frame:#EFEFF2;--side-ink:#3B3842;--card-r:20px}
html,body{background:var(--frame)}
[hidden]{display:none!important}
.app{display:grid;grid-template-columns:264px minmax(0,1fr);min-height:100vh;padding:12px 12px 12px 0}
.loading{color:var(--muted);padding:120px 0;text-align:center;grid-column:1/-1}

/* sidebar */
.side{display:flex;flex-direction:column;padding:14px 16px 8px 20px;position:sticky;top:12px;height:calc(100vh - 24px)}
.side .brand{padding:6px 10px 22px}
.nav{display:grid;gap:2px}
.nav a,.nav button{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:12px;font:500 14px/1.2 var(--sans);color:var(--side-ink);background:none;border:0;cursor:pointer;text-align:left;width:100%}
.nav a:hover,.nav button:hover{background:rgba(20,18,24,.04)}
.nav a.on{background:#fff;color:var(--ink);box-shadow:0 1px 2px rgba(20,18,24,.06)}
.nav svg{width:18px;height:18px;flex:none;color:#6B6773}
.nav a.on svg{color:var(--accent)}
.nav .dot{width:8px;height:8px;border-radius:50%;background:#D5D3DB;flex:none;margin:0 5px}
.nav .dot.go{background:var(--accent)}
.nav .t{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.side-label{display:flex;align-items:center;gap:10px;font-size:11px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin:26px 12px 8px}
.side-label::after{content:"";flex:1;height:1px;background:#DEDDE3}
.side-foot{margin-top:auto;display:grid;gap:8px}
.me{display:flex;align-items:center;gap:10px;padding:10px;border-radius:14px;background:#fff;box-shadow:0 1px 2px rgba(20,18,24,.05)}
.av{width:34px;height:34px;border-radius:50%;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;font-weight:600;font-size:13px;flex:none}
.me .who{min-width:0;flex:1}
.me b{display:block;font-size:13px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.me span{display:block;font-size:12px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.icon-btn{width:34px;height:34px;border-radius:10px;border:0;background:none;display:grid;place-items:center;cursor:pointer;color:#6B6773;flex:none}
.icon-btn:hover{background:var(--bg-soft);color:var(--ink)}
.icon-btn svg{width:18px;height:18px}

/* workspace */
.main{background:#fff;border-radius:24px;min-width:0;padding:40px 44px 64px;box-shadow:0 1px 2px rgba(20,18,24,.04);min-height:calc(100vh - 24px)}
.topbar{display:none}
.pg-hd{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;flex-wrap:wrap;margin-bottom:28px}
.pg-hd h1{font-size:clamp(36px,4vw,48px);line-height:1.05}
.pg-hd p{color:var(--body);margin:8px 0 0}
.crumb{display:flex;gap:8px;align-items:center;font-size:13px;color:var(--muted);margin-bottom:18px;flex-wrap:wrap}
.crumb a{color:var(--body)}
.crumb a:hover{color:var(--ink)}
.pills{display:flex;gap:8px;flex-wrap:wrap}
.pills button{font:500 13px/1 var(--sans);padding:10px 14px;border-radius:12px;border:1px solid var(--line);background:#fff;color:var(--body);cursor:pointer}
.pills a{font:500 13px/1 var(--sans);padding:10px 14px;border-radius:12px;border:1px solid var(--line);background:#fff;color:var(--body)}
.pills a[aria-current="page"],.pills button[aria-pressed="true"]{background:var(--bg-soft);border-color:var(--bg-soft);color:var(--ink)}
.rule{height:1px;background:var(--line);margin:24px 0 28px}
.box{border:1px solid var(--line);border-radius:var(--card-r);padding:22px;background:#fff}
.box h3{font-family:var(--sans);font-size:15px;font-weight:600;letter-spacing:0}
.label{font-size:12px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.btn-sm{padding:10px 16px;font-size:14px}
.bar{height:6px;background:var(--bg-soft);border-radius:99px;overflow:hidden}
.bar i{display:block;height:100%;background:var(--accent);border-radius:99px;transition:width .4s ease}
.muted{color:var(--muted)}
.link{color:var(--accent);cursor:pointer;background:none;border:0;font:inherit;padding:0;text-align:left}

/* home */
.home{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:24px;align-items:start}
.cont{border-radius:var(--card-r);background:var(--ink);color:#fff;padding:28px;display:grid;gap:16px}
.cont .label{color:#B9B5C3}
.cont h2{font-size:clamp(30px,3.2vw,40px);line-height:1.05}
.cont p{margin:0;color:#CFCBD8;max-width:36em}
.cont .bar{background:#34303D}
.cont .crow{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}
.cont .btn{background:#fff;color:var(--ink);border-color:#fff}
.cont .small{font-size:13px;color:#B9B5C3}
.sec-title{display:flex;justify-content:space-between;align-items:baseline;margin:34px 0 14px}
.sec-title h2{font-family:var(--sans);font-size:17px;font-weight:600;letter-spacing:0}
.sec-title a{font-size:14px;color:var(--accent)}
.stack{display:grid;gap:16px}
.next-item{display:grid;gap:10px}
.next-item + .next-item{border-top:1px solid var(--line);padding-top:16px;margin-top:6px}
.next-item b{font-weight:500}
.next-item .crow{display:flex;justify-content:space-between;align-items:center;gap:12px}
.price-s{font-family:var(--serif);font-size:24px;line-height:1}
.brief{font-size:15px;color:var(--body);margin:10px 0 0}
@media(max-width:1100px){.home{grid-template-columns:1fr}}

/* course cards */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px}
.ccard{border:1px solid var(--line);border-radius:var(--card-r);padding:22px;display:flex;flex-direction:column;gap:12px;background:#fff;color:inherit;transition:border-color .15s,box-shadow .15s}
.ccard:hover{border-color:#CFCDD6;box-shadow:0 6px 20px rgba(20,18,24,.05)}
.cicon{width:52px;height:52px;border-radius:50%;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;font-family:var(--serif);font-size:22px}
.ccard h3{font-family:var(--sans);font-size:17px;font-weight:600;letter-spacing:0;margin-top:6px}
.ccard p{margin:0;font-size:14px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.ccard .ft{white-space:nowrap;margin-top:auto;padding-top:6px;display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted);flex-wrap:wrap}
.ccard .ft .bar{width:100%;flex:none}
.ccard .ft .sep{width:3px;height:3px;border-radius:50%;background:#C9C6D0}

/* course page */
.course-hd{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:32px;align-items:end;margin-bottom:32px}
.course-hd h1{font-size:clamp(36px,4vw,52px);line-height:1.04;margin-top:10px}
.course-hd p{color:var(--body);margin:12px 0 0;max-width:36em}
.prog .top{display:flex;justify-content:space-between;align-items:baseline;gap:12px;margin-bottom:14px}
.prog b{font-family:var(--serif);font-weight:400;font-size:30px;line-height:1}
.prog span{font-size:13px;color:var(--muted)}
.prog .link{margin-top:14px;font-size:14px}
@media(max-width:1000px){.course-hd{grid-template-columns:1fr}}
.mlist{border-top:1px solid var(--line)}
.mod{border-bottom:1px solid var(--line)}
.mod-row{display:grid;grid-template-columns:56px minmax(0,1fr) auto;gap:20px;align-items:center;padding:20px 0;width:100%;color:inherit}
a.mod-row:hover .t{color:var(--accent)}
.mod-row .n{font-family:var(--serif);font-size:28px;line-height:1}
.mod-row .t{font-weight:500;font-size:16px;display:block}
.mod-row .s{font-size:14px;color:var(--body);display:block;margin-top:4px;max-width:46em}
.mod.locked .n,.mod.locked .t{color:var(--muted)}
.mod.locked .s{color:#A9A6B0}
.mod.next{background:linear-gradient(90deg,var(--accent-soft),rgba(238,234,251,0) 70%);margin-inline:-16px;padding-inline:16px;border-radius:14px;border-bottom-color:transparent}
.chip{font-size:12px;font-weight:500;border-radius:99px;padding:6px 12px;white-space:nowrap;display:inline-flex;align-items:center;gap:6px}
.chip.ok{background:var(--ok-soft);color:var(--ok)}
.chip.go{background:var(--accent-soft);color:var(--accent)}
.chip.lock{background:var(--bg-soft);color:var(--muted)}
.chip svg{width:12px;height:12px}
@media(max-width:640px){.mod-row{grid-template-columns:40px minmax(0,1fr);gap:14px}.mod-row .n{font-size:22px}.mod-row .act{grid-column:2}}

/* module page */
.mpage{display:grid;grid-template-columns:360px minmax(0,1fr);gap:20px;align-items:start}
.minfo{position:sticky;top:24px}
.minfo h1{font-size:34px;line-height:1.05;margin-top:8px}
.minfo p{margin:0;color:var(--body);font-size:15px}
.mfacts{display:grid;gap:10px;border-top:1px solid var(--line);padding-top:16px;font-size:14px}
.mfacts div{display:flex;justify-content:space-between;gap:12px}
.mfacts span{color:var(--muted);display:flex;gap:8px;align-items:center}
.mfacts svg{width:15px;height:15px}
.lessons{display:grid;gap:6px}
.lesson{display:flex;align-items:center;gap:12px;padding:12px;border-radius:14px;border:1px solid var(--line);font-size:14px;color:var(--ink);width:100%;text-align:left;background:#fff}
.lesson.on{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.lesson .ck{width:26px;height:26px;border-radius:50%;border:1.5px solid #D5D3DB;display:grid;place-items:center;flex:none;font-size:12px;color:var(--muted)}
.lesson.done .ck{background:var(--ok);border-color:var(--ok);color:#fff}
.lesson .ck svg{width:13px;height:13px}
.lesson .lt{flex:1;min-width:0}
.lesson .lm{font-size:12px;color:var(--muted);white-space:nowrap}
.assign{background:var(--bg-soft);border-radius:16px;padding:16px 18px;font-size:14px;color:var(--body)}
.assign .label{display:block;margin-bottom:6px}
.reader{border:1px solid var(--line);border-radius:var(--card-r);min-height:520px;display:flex;flex-direction:column}
.reader-top{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:14px 18px;border-bottom:1px solid var(--line);font-size:13px;color:var(--muted)}
.reader-body{padding:36px clamp(20px,5vw,64px) 40px;max-width:820px;width:100%;margin:0 auto}
.reader-foot{margin-top:auto;display:flex;justify-content:space-between;align-items:center;gap:12px;padding:16px 18px;border-top:1px solid var(--line);flex-wrap:wrap}
.empty{margin:auto;text-align:center;max-width:380px;padding:48px 24px;display:grid;gap:12px;justify-items:center}
.empty .ei{width:56px;height:56px;border-radius:50%;background:var(--bg-soft);display:grid;place-items:center;color:var(--muted)}
.empty .ei svg{width:22px;height:22px}
.empty h2{font-size:28px;line-height:1.1}
.empty p{margin:0;color:var(--body);font-size:15px}
@media(max-width:1100px){.mpage{grid-template-columns:1fr}.minfo{position:static}}

/* lesson typography (content arrives from the database) */
.prose h1{font-size:clamp(32px,3.6vw,44px);line-height:1.05;margin:0 0 18px}
.prose h2{font-size:28px;line-height:1.15;margin:36px 0 12px}
.prose p,.prose li{color:var(--body);font-size:17px;line-height:1.7}
.prose p{margin:0 0 16px}
.prose .lede{font-size:19px;color:var(--ink)}
.prose ul,.prose ol{padding-left:22px;margin:0 0 18px}
.prose li{margin-bottom:6px}
.prose b{color:var(--ink);font-weight:600}
.prose table{width:100%;border-collapse:collapse;margin:8px 0 22px;font-size:15px}
.prose th,.prose td{text-align:left;padding:12px 10px;border-bottom:1px solid var(--line);vertical-align:top}
.prose th{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-weight:600}
.prose .note{background:var(--accent-soft);border-radius:14px;padding:16px 18px;color:#3F3290;margin:0 0 20px;font-size:15px}
.prose .sum{border:1px solid var(--line);border-radius:16px;padding:18px 20px;margin-top:32px}

/* auth */
.auth-wrap{grid-column:1/-1;display:grid;place-items:center;padding:24px 12px}
.auth{background:#fff;border-radius:28px;display:grid;grid-template-columns:1fr 420px;gap:48px;padding:48px;max-width:1080px;width:100%}
.auth h1{font-size:clamp(38px,4.6vw,58px);line-height:1.02;margin:14px 0 16px}
.auth .lead{color:var(--body);font-size:17px;margin:0}
.picked{margin-top:28px;border:1px solid var(--line);border-radius:20px;padding:22px;display:grid;gap:12px}
.picked h3{font-size:28px;line-height:1.05}
.picked .row2{display:flex;gap:28px;flex-wrap:wrap;font-size:13px;color:var(--muted)}
.picked .row2 b{display:block;font-family:var(--serif);font-weight:400;font-size:24px;color:var(--ink);line-height:1.2}
.seg{display:grid;grid-template-columns:1fr 1fr;background:var(--bg-soft);border-radius:999px;padding:4px;margin-bottom:22px}
.seg button{font:500 14px/1 var(--sans);border:0;background:transparent;padding:11px;border-radius:999px;cursor:pointer;color:var(--body)}
.seg button[aria-selected="true"]{background:#fff;color:var(--ink);box-shadow:0 1px 3px rgba(20,18,24,.08)}
.field{display:grid;gap:6px;margin-bottom:14px}
.field label{font-size:13px;font-weight:500}
.field input{font:400 16px/1.4 var(--sans);padding:13px 14px;border:1px solid var(--line);border-radius:12px;background:#fff;color:var(--ink);width:100%}
.field input:focus{border-color:var(--accent);outline:none}
.auth form .btn,#resetForm .btn{width:100%}
.msg{font-size:14px;color:var(--body);min-height:22px;margin:12px 0 0}
.msg.err{color:#B4232A}
.small{font-size:13px;color:var(--muted);margin:14px 0 0}
.auth-side{border-left:1px solid var(--line);padding-left:48px}
@media(max-width:960px){.auth{grid-template-columns:1fr;padding:28px;gap:28px}.auth-side{border:0;padding:0}}

/* dialog */
dialog{border:0;border-radius:22px;padding:0;max-width:460px;width:calc(100% - 32px);box-shadow:0 24px 60px rgba(20,18,24,.22);color:var(--ink)}
dialog::backdrop{background:rgba(20,18,24,.45)}
.dlg{padding:28px;display:grid;gap:16px}
.dlg h2{font-size:32px;line-height:1.05}
.dlg p{margin:0;color:var(--body)}
.dlg .o{display:flex;justify-content:space-between;align-items:center;border:1px solid var(--line);border-radius:14px;padding:14px 16px;gap:12px}
.dlg .o b{font-weight:500;display:block}
.dlg .o small{color:var(--muted);font-size:13px}
.dlg .o .v{font-family:var(--serif);font-size:24px}
.dlg .note{font-size:14px;background:var(--accent-soft);color:#4B3A9E;border-radius:12px;padding:12px 14px}
.dlg .acts{display:flex;gap:10px;flex-wrap:wrap}
.dlg .acts .btn{flex:1}

/* mobile shell */
@media(max-width:900px){
  .app{grid-template-columns:1fr;padding:0}
  .side{position:fixed;inset:0 auto 0 0;width:280px;height:100%;background:var(--frame);z-index:40;transform:translateX(-100%);transition:transform .2s ease;top:0;box-shadow:0 0 40px rgba(20,18,24,.15)}
  body.menu .side{transform:none}
  .scrim{position:fixed;inset:0;background:rgba(20,18,24,.35);z-index:30}
  .topbar{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;position:sticky;top:0;background:var(--frame);z-index:20}
  .main{border-radius:22px 22px 0 0;padding:28px 16px 56px;min-height:calc(100vh - 60px)}
}

/* print = "Save as PDF" for the open lesson */
.print-hd{display:none}
@media print{
  html,body{background:#fff}
  .side,.topbar,.minfo,.reader-top,.reader-foot,.crumb,dialog{display:none!important}
  .app{display:block;padding:0}.main{padding:0;box-shadow:none;min-height:0}
  .mpage{display:block}.reader{border:0;min-height:0}.reader-body{padding:0;max-width:none}
  .print-hd{display:block!important;font-size:12px;color:#8A8693;margin-bottom:18px}
}

/* ---------- assignments & feedback ---------- */
.chip.warn{background:#FCEFD9;color:#8A5300}
.chip.wait{background:var(--accent-soft);color:var(--accent)}
.chip.none{background:var(--bg-soft);color:var(--muted)}
.nav .badge{margin-left:auto;font-size:11px;font-weight:600;background:var(--accent);color:#fff;border-radius:99px;padding:2px 8px;line-height:1.4}
.more-title{margin-top:48px}
.apage{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:24px;align-items:start}
.apage .side-col{display:grid;gap:16px;position:sticky;top:24px}
@media(max-width:1100px){.apage{grid-template-columns:1fr}.apage .side-col{position:static}}
.a-hd h1{font-size:clamp(34px,4vw,48px);line-height:1.05;margin-top:10px}
.brief-box{background:var(--bg-soft);border-radius:18px;padding:20px 22px;margin:20px 0 24px}
.brief-box p{margin:6px 0 0;font-size:17px;color:var(--ink)}
.form{border:1px solid var(--line);border-radius:var(--card-r);padding:22px;display:grid;gap:16px;margin-bottom:28px}
.form h2,.round h2{font-family:var(--sans);font-size:17px;font-weight:600;letter-spacing:0}
.drop{border:1.5px dashed #CFCDD6;border-radius:16px;padding:28px 20px;text-align:center;background:var(--bg-soft);cursor:pointer;display:grid;gap:6px;justify-items:center;color:var(--body);font-size:14px}
.drop.over{border-color:var(--accent);background:var(--accent-soft)}
.drop b{color:var(--ink);font-weight:500;font-size:15px}
.drop svg{width:22px;height:22px;color:var(--muted)}
.flist{display:grid;gap:8px}
.frow{display:flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:12px;padding:8px 10px;font-size:14px}
.frow .fx{width:40px;height:40px;border-radius:8px;background:var(--bg-soft);flex:none;overflow:hidden;display:grid;place-items:center;font-size:11px;font-weight:600;color:var(--muted)}
.frow .fx img{width:100%;height:100%;object-fit:cover}
.frow .fn{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.frow .fs{color:var(--muted);font-size:12px;white-space:nowrap}
textarea{font:400 15px/1.5 var(--sans);padding:12px 14px;border:1px solid var(--line);border-radius:12px;width:100%;resize:vertical;min-height:96px;color:var(--ink);background:#fff}
textarea:focus{border-color:var(--accent);outline:none}
.form .acts{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.round{border:1px solid var(--line);border-radius:var(--card-r);padding:22px;display:grid;gap:16px;margin-bottom:16px;scroll-margin-top:24px}
.round .rh{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.round .rh span{font-size:13px;color:var(--muted)}
.round .snote{font-size:15px;color:var(--body);white-space:pre-wrap;margin:0}
.thumbs{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}
.thumb{position:relative;aspect-ratio:4/3;border-radius:12px;overflow:hidden;background:var(--bg-soft);border:1px solid var(--line);cursor:zoom-in;padding:0;display:block;width:100%}
.thumb img{width:100%;height:100%;object-fit:cover;display:block}
.thumb .nc{position:absolute;left:8px;bottom:8px;background:var(--accent);color:#fff;font-size:11px;font-weight:600;border-radius:99px;padding:3px 8px}
.thumb.tpdf{display:grid;place-items:center;cursor:pointer;color:var(--body);font-size:13px;text-align:center;padding:12px}
.thumb.tpdf b{display:block;font-size:12px;font-weight:600;color:var(--accent);letter-spacing:.1em;margin-bottom:6px}
.fb{background:var(--bg-soft);border-radius:16px;padding:18px 20px;display:grid;gap:12px}
.fb .fh{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;font-size:13px;color:var(--muted)}
.fb .fh b{color:var(--ink);font-size:14px;font-weight:600}
.fb .body{white-space:pre-wrap;color:var(--ink);font-size:15px;line-height:1.65;margin:0}
.notes{list-style:none;margin:0;padding:0;display:grid;gap:8px;counter-reset:n}
.notes li{display:flex;gap:10px;font-size:14px;color:var(--body);align-items:flex-start}
.pinno{width:22px;height:22px;border-radius:50%;background:var(--accent);color:#fff;font-size:11px;font-weight:600;display:grid;place-items:center;flex:none}
.pin{position:absolute;transform:translate(-50%,-50%);width:26px;height:26px;border-radius:50%;background:var(--accent);color:#fff;font-size:12px;font-weight:600;display:grid;place-items:center;border:2px solid #fff;box-shadow:0 2px 8px rgba(20,18,24,.3);pointer-events:none}
.waiting{border:1px solid var(--line);border-radius:var(--card-r);padding:22px;display:flex;gap:14px;align-items:flex-start;margin-bottom:28px}
.waiting .ei{width:40px;height:40px;border-radius:50%;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;flex:none}
.waiting .ei svg{width:18px;height:18px}
.waiting p{margin:4px 0 0;color:var(--body);font-size:15px}
.steps-s{list-style:none;margin:12px 0 0;padding:0;display:grid;gap:12px;font-size:14px;color:var(--body)}
.steps-s li{display:flex;gap:10px}
.steps-s span{width:22px;height:22px;border-radius:50%;background:var(--bg-soft);color:var(--ink);font-size:11px;font-weight:600;display:grid;place-items:center;flex:none}

/* lists: assignments, feedback, review queue */
.alist{border-top:1px solid var(--line)}
.arow{display:grid;grid-template-columns:56px minmax(0,1fr) auto;gap:20px;align-items:center;padding:18px 0;border-bottom:1px solid var(--line);color:inherit}
.arow:hover .t{color:var(--accent)}
.arow .n{font-family:var(--serif);font-size:26px;line-height:1}
.arow .t{font-weight:500;font-size:16px;display:block}
.arow .s{font-size:14px;color:var(--body);display:block;margin-top:3px}
.arow .act{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--muted);flex-wrap:wrap;justify-content:flex-end}
.group-title{font-family:var(--sans);font-size:13px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin:28px 0 6px}
.fcards{display:grid;gap:12px}
.fcard{border:1px solid var(--line);border-radius:var(--card-r);padding:20px 22px;display:grid;gap:10px;color:inherit}
.fcard:hover{border-color:#CFCDD6}
.fcard .top{display:flex;justify-content:space-between;gap:12px;align-items:center;flex-wrap:wrap}
.fcard .top span{font-size:13px;color:var(--muted)}
.fcard b{font-weight:500;font-size:16px}
.fcard p{margin:0;color:var(--body);font-size:15px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
@media(max-width:640px){.arow{grid-template-columns:40px minmax(0,1fr)}.arow .n{font-size:22px}.arow .act{grid-column:2;justify-content:flex-start}}

/* mentor review */
.rv{display:grid;grid-template-columns:minmax(0,1fr) 380px;gap:24px;align-items:start}
.rv .side-col{position:sticky;top:24px;display:grid;gap:16px}
@media(max-width:1100px){.rv{grid-template-columns:1fr}.rv .side-col{position:static}}
.rimgs{display:grid;gap:18px}
.rimg{position:relative;display:block;width:fit-content;max-width:100%;cursor:crosshair;border-radius:14px;overflow:hidden;border:1px solid var(--line)}
.rimg img{display:block;max-width:100%;max-height:80vh;width:auto;height:auto}
.rhint{font-size:13px;color:var(--muted);margin:0 0 4px}
.nrow{display:flex;gap:10px;align-items:flex-start}
.nrow textarea{min-height:60px;font-size:14px}
.verdict{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.verdict .btn{width:100%}
.prev-r{border-top:1px solid var(--line);padding-top:14px;display:grid;gap:8px;font-size:14px;color:var(--body)}

/* lightbox */
#lb{max-width:min(1200px,96vw);width:auto;background:#fff;padding:0}
#lb .lbin{padding:16px;display:grid;gap:12px}
#lb .lbtop{display:flex;justify-content:space-between;align-items:center;gap:12px;font-size:14px}
#lb .lbwrap{position:relative;width:fit-content;max-width:100%;margin:0 auto}
#lb .lbwrap img{display:block;max-width:100%;max-height:72vh;width:auto;height:auto}

/* ---------- mentor dashboard ---------- */
.tiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:14px}
.tile{border:1px solid var(--line);border-radius:var(--card-r);padding:20px 22px;display:grid;gap:6px}
.tile b{font-family:var(--serif);font-weight:400;font-size:40px;line-height:1}
.tile span{font-size:14px;color:var(--ink);font-weight:500}
.tile small{font-size:13px;color:var(--muted)}
.mini{display:flex;align-items:center;gap:10px;padding:10px 0;border-top:1px solid var(--line);color:inherit}
.mini:first-of-type{border-top:0}
.mini .who{min-width:0;flex:1}
.mini .who b{display:block;font-size:14px;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.mini .who span{display:block;font-size:12px;color:var(--muted)}
a.mini:hover b{color:var(--accent)}
.amt{font-family:var(--serif);font-weight:400;font-size:20px;white-space:nowrap}
.filters{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin-bottom:22px}
.shead,.srow{display:grid;grid-template-columns:minmax(220px,1.3fr) minmax(0,1.4fr) 150px 110px;gap:16px;align-items:center}
.shead{font-size:12px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);padding:0 0 10px;border-bottom:1px solid var(--line)}
.srow{padding:14px 0;border-bottom:1px solid var(--line);color:inherit}
.srow:hover .who b{color:var(--accent)}
.sw{display:flex;align-items:center;gap:12px;min-width:0}
.sw .who{min-width:0}
.sw .who b{display:block;font-weight:500;font-size:15px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.sw .who span{display:block;font-size:13px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.cms{display:flex;gap:6px;flex-wrap:wrap}
.cm{font-size:12px;border:1px solid var(--line);border-radius:99px;padding:4px 10px;color:var(--body);white-space:nowrap}
.cm b{font-weight:600;color:var(--ink);margin-right:6px}
.sj{font-size:13px}
@media(max-width:900px){.shead{display:none}.srow{grid-template-columns:1fr auto}.srow .cms{grid-column:1/-1;order:3}.srow .sj{display:none}}
.shd{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.shd h1{font-size:clamp(32px,4vw,44px);line-height:1.05}
.av.lg{width:64px;height:64px;font-size:24px;font-family:var(--serif)}
.mcells{display:flex;gap:6px;flex-wrap:wrap}
.mc{width:38px;height:38px;border-radius:10px;display:grid;place-items:center;font-size:12px;font-weight:600;border:1px solid var(--line);color:var(--muted);background:#fff}
.mc.ul{color:var(--ink);border-color:#CFCDD6}
.mc.ap{background:var(--ok-soft);border-color:var(--ok-soft);color:var(--ok)}
.mc.wt{background:var(--accent);border-color:var(--accent);color:#fff}
.mc.rv{background:#FCEFD9;border-color:#FCEFD9;color:#8A5300}
.mc.lk{background:var(--bg-soft);border-color:var(--bg-soft);color:#B5B2BC}
a .mc.wt:hover,a .mc:hover{box-shadow:0 0 0 3px var(--accent-soft)}
.legend{display:flex;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--muted)}
.legend span{display:flex;align-items:center;gap:6px}
.legend .mc{width:14px;height:14px;border-radius:4px;display:inline-block}
select{font:400 15px/1.4 var(--sans);padding:12px 14px;border:1px solid var(--line);border-radius:12px;background:#fff;color:var(--ink);width:100%}
select:focus{border-color:var(--accent);outline:none}
.two{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:800px){.two-col{grid-template-columns:1fr}}
.brow{display:grid;gap:6px;margin-bottom:14px}
.brow .bl{display:flex;justify-content:space-between;font-size:14px}
.brow .bl b{font-weight:500}
.tw{overflow-x:auto;border:1px solid var(--line);border-radius:var(--card-r)}
.ptab{width:100%;border-collapse:collapse;font-size:14px;min-width:640px}
.ptab th,.ptab td{text-align:left;padding:12px 16px;border-bottom:1px solid var(--line)}
.ptab th{font-size:12px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.ptab tr:last-child td{border-bottom:0}
.ptab .num{text-align:right;white-space:nowrap}
.ptab a{color:var(--accent)}
.mcells a{display:block;line-height:0}

/* ---------- ask a mentor ---------- */
.thread{display:grid;gap:12px}
.bubble{max-width:82%;background:var(--bg-soft);border-radius:18px 18px 18px 6px;padding:14px 16px}
.bubble.me{justify-self:end;background:var(--accent-soft);border-radius:18px 18px 6px 18px}
.bubble .bh{display:flex;justify-content:space-between;gap:16px;font-size:12px;color:var(--muted);margin-bottom:6px}
.bubble .bh b{color:var(--ink);font-weight:600}
.bubble p{margin:0;white-space:pre-wrap;font-size:15px;line-height:1.6;color:var(--ink)}
.arow .av{width:40px;height:40px}
@media(max-width:640px){.bubble{max-width:100%}}

/* ---------- resources ---------- */
.rgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:14px}
.rgrid.one{grid-template-columns:1fr}
.rcard{border:1px solid var(--line);border-radius:var(--card-r);padding:18px;display:flex;gap:14px;align-items:flex-start}
.rext{width:48px;height:56px;border-radius:10px;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;font-size:11px;font-weight:700;letter-spacing:.06em;flex:none}
.rbody{flex:1;min-width:0;display:grid;gap:4px}
.rbody b{font-weight:500;font-size:16px}
.rbody p{margin:0;font-size:14px;color:var(--body)}
.ract{display:grid;gap:8px;justify-items:end}
@media(max-width:520px){.rcard{flex-wrap:wrap}.ract{width:100%;justify-items:start}}

/* ---------- quiz yourself ---------- */
.qwrap{border:1px solid var(--line);border-radius:var(--card-r);padding:28px;display:grid;gap:18px;max-width:760px;margin-top:20px}
.qtop{display:flex;align-items:center;gap:16px;font-size:13px;color:var(--muted)}
.qq{font-size:clamp(24px,2.6vw,30px);line-height:1.2}
.qopts{display:grid;gap:10px}
.qopt{display:flex;align-items:center;gap:14px;text-align:left;font:400 16px/1.45 var(--sans);color:var(--ink);background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px 16px;cursor:pointer;transition:border-color .15s}
.qopt:hover:not(:disabled){border-color:var(--accent)}
.qopt:disabled{cursor:default}
.qopt .ql{width:28px;height:28px;border-radius:50%;background:var(--bg-soft);display:grid;place-items:center;font-size:12px;font-weight:600;flex:none}
.qopt.right{border-color:var(--ok);background:var(--ok-soft)}
.qopt.right .ql{background:var(--ok);color:#fff}
.qopt.wrong{border-color:#E8B4A8;background:#FBEDEA}
.qopt.wrong .ql{background:#B4472F;color:#fff}
.qopt.dim{opacity:.6}
.qfb{border-radius:14px;padding:14px 16px;font-size:15px}
.qfb.ok{background:var(--ok-soft);color:#1F5A40}
.qfb.no{background:#FBEDEA;color:#7A2F1F}
.qres{display:grid;gap:4px}
.qres b{font-family:var(--serif);font-weight:400;font-size:48px;line-height:1}
.qres span{color:var(--body)}
.qreview{display:grid;gap:10px}
.qr{display:flex;gap:12px;border:1px solid var(--line);border-radius:14px;padding:14px 16px}
.qr b{font-weight:500}
.qr p{margin:4px 0 0;font-size:14px}
.qmark{width:24px;height:24px;border-radius:50%;display:grid;place-items:center;flex:none;font-size:14px;font-weight:700}
.qr.ok .qmark{background:var(--ok);color:#fff}
.qr.ok .qmark svg{width:13px;height:13px}
.qr.no .qmark{background:#B4472F;color:#fff}

/* ---------- key points sheet (A4, printed or saved as PDF) ---------- */
#printArea{display:none}
.ks{font-family:var(--sans);color:var(--ink);font-size:9.3pt;line-height:1.45}
.ks-hd{display:flex;justify-content:space-between;align-items:center;padding-bottom:10px;border-bottom:1px solid var(--line);font-size:8pt;color:var(--muted)}
.ks-brand{display:flex;align-items:center;gap:8px;font-weight:600;color:var(--ink)}
.ks-brand .mark{width:14px;gap:2px}.ks-brand .mark span{height:3px}
.ks-brand .mark span:nth-child(1){width:10px}.ks-brand .mark span:nth-child(2){width:14px}.ks-brand .mark span:nth-child(3){width:10px}
.ks-title{padding:18px 0 12px}
.ks-eyebrow{font-size:7.5pt;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--accent)}
.ks-title h1{font-family:var(--serif);font-weight:400;font-size:28pt;line-height:1.02;margin:6px 0 4px}
.ks-title p{margin:0;color:var(--muted);font-size:9.5pt}
.ks-block{break-inside:avoid;padding:11px 0;border-top:1px solid var(--line)}
.ks-block h3{font-family:var(--serif);font-weight:400;font-size:15pt;margin:0 0 8px}
.ks-points{margin:0;padding:0;list-style:none;counter-reset:k;display:grid;gap:6px}
.ks-points li{counter-increment:k;position:relative;padding-left:28px}
.ks-points li::before{content:counter(k);position:absolute;left:0;top:0;width:18px;height:18px;border-radius:50%;background:var(--accent-soft);color:var(--accent);font-size:8pt;font-weight:600;display:grid;place-items:center}
.ks table{width:100%;border-collapse:collapse;font-size:8.8pt}
.ks th,.ks td{text-align:left;vertical-align:top;padding:6px 8px;border-bottom:1px solid var(--line)}
.ks th{font-size:7pt;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.ks td:first-child{white-space:nowrap;width:1%}
.ks-note{margin:8px 0 0;font-size:8.3pt;color:var(--muted)}
.ks-terms{display:grid;grid-template-columns:auto 1fr;gap:5px 14px;margin:0}
.ks-terms dt{font-weight:600}
.ks-terms dd{margin:0;color:var(--body)}
.ks-ft{display:flex;justify-content:space-between;margin-top:14px;padding-top:10px;border-top:1px solid var(--line);font-size:7.5pt;color:var(--muted)}
@media print{
  @page{size:A4;margin:12mm 14mm}
  body.print-ks > *:not(#printArea){display:none!important}
  body.print-ks #printArea{display:block}
  body.print-ks{background:#fff;margin:0}
  body.print-ks .ks-ft{position:fixed;left:0;right:0;bottom:0;margin:0;background:#fff}
  .ks *{-webkit-print-color-adjust:exact;print-color-adjust:exact}
}
.prose .src{font-size:13px;color:var(--muted);margin-top:28px;border-top:1px solid var(--line);padding-top:14px}
.prose .src a{color:var(--accent)}
.prose h3{font-family:var(--sans);font-size:17px;font-weight:600;letter-spacing:0;margin:24px 0 8px}
.prose ol.steps{list-style:none;padding:0;counter-reset:st;display:grid;gap:14px}
.prose ol.steps li{counter-increment:st;position:relative;padding-left:44px;margin:0}
.prose ol.steps li::before{content:counter(st);position:absolute;left:0;top:2px;width:30px;height:30px;border-radius:50%;background:var(--accent-soft);color:var(--accent);font-size:13px;font-weight:600;display:grid;place-items:center}
.prose ol.steps li b{display:block;color:var(--ink)}
.prose ol.steps li span{display:block}

/* Lesson figures */
.prose .fig{margin:8px 0 24px}
.prose .fig svg{width:100%;height:auto;display:block}
.prose figcaption{font-size:13px;color:var(--muted);margin-top:8px}

/* Lesson videos */
.prose .fig video{width:100%;height:auto;display:block;border-radius:14px;background:#F6F5F2;border:1px solid var(--line)}