/* ==========================================================================
   app.css — shared components for the mockup. Colours ONLY through tokens.css.
   Load order on every page: fonts.css → global-ui.css → tokens.css → app.css
   ========================================================================== */
[hidden]{display:none!important}
html{background:var(--bg)}
body{font-family:var(--body);color:var(--ink);background:var(--wash),var(--bg);background-attachment:fixed;
  font-size:15px;line-height:1.5;-webkit-font-smoothing:antialiased;min-height:100dvh}
h1,h2,h3,h4{font-family:var(--display);font-weight:var(--display-w);letter-spacing:var(--display-ls);margin:0;color:var(--ink);text-wrap:balance}
h1{font-size:var(--h1);line-height:1.15}
h2{font-size:18px;line-height:1.25}
h3{font-size:var(--h2);line-height:1.3}
p{margin:0}
a{color:var(--accent-ink)}
img{max-width:100%;display:block}
.num{font-variant-numeric:lining-nums tabular-nums}
input[type=checkbox],input[type=radio]{min-height:0;width:18px;height:18px;accent-color:var(--accent)}
:focus-visible{outline:none;box-shadow:var(--focus-ring);border-radius:8px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ---- icons (Material Symbols SVG used as a mask so they take currentColor) ---- */
.ic{width:20px;height:20px;display:inline-block;flex:none;background:currentColor;
  -webkit-mask:var(--ic) center/contain no-repeat;mask:var(--ic) center/contain no-repeat}
.ic.sm{width:16px;height:16px}.ic.lg{width:24px;height:24px}.ic.xl{width:32px;height:32px}

/* ---- mockup strip (on every page) ---- */
.strip{position:sticky;top:0;z-index:var(--z-nav);min-height:44px;display:flex;align-items:center;justify-content:center;gap:8px 16px;flex-wrap:wrap;
  padding:0 16px;background:var(--strip-bg);color:var(--strip-ink);font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;font-weight:600}
.strip-text{display:inline-flex;align-items:center;gap:6px;text-align:center}
.strip-btn{display:inline-flex;align-items:center;gap:6px;border:var(--ghost-border);background:var(--surface);color:var(--sub);
  border-radius:var(--btn-radius);padding:0 12px;min-height:44px;font-size:12px;letter-spacing:.04em;text-transform:none;font-weight:600;cursor:pointer}
.strip-btn:hover{color:var(--accent-ink);border-color:var(--accent)}
.strip .warn-note{color:var(--warn);text-transform:none;letter-spacing:0}

/* ---- buttons, chips, labels ---- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 18px;border-radius:22px;
  background:var(--accent);color:var(--on-accent);font-weight:500;font-size:14px;border:var(--btn-border);box-shadow:var(--btn-shadow);
  cursor:pointer;text-decoration:none;white-space:nowrap;transition:background .15s,box-shadow .15s}
.btn:hover{background:var(--accent-ink)}
.btn.ghost{background:var(--surface);color:var(--accent-ink);border:var(--ghost-border)}
.btn.ghost:hover{background:var(--accent-soft)}
.btn.quiet{background:transparent;color:var(--accent-ink);border:0;padding:0 12px}
.btn.quiet:hover{background:var(--accent-soft)}
.btn.danger{background:var(--surface);color:var(--warn);border:var(--ghost-border)}
.btn.danger:hover{background:var(--warn-soft)}
.btn.block{width:100%}
.btn[disabled],.btn[aria-disabled=true]{opacity:.5;pointer-events:none}
.icon-btn{display:inline-grid;place-items:center;width:44px;height:44px;border-radius:50%;border:0;background:transparent;color:var(--sub);cursor:pointer;padding:0}
.icon-btn:hover{background:var(--neutral-soft);color:var(--ink)}
.chip{display:inline-flex;align-items:center;gap:5px;min-height:24px;padding:2px 10px;border-radius:var(--chip-radius);font-size:12px;font-weight:500;
  background:var(--neutral-soft);color:var(--sub);white-space:nowrap;max-width:100%;overflow:hidden;text-overflow:ellipsis}
.chip.warn{background:var(--warn-soft);color:var(--warn)}
.chip.ok{background:var(--alt-soft);color:var(--alt-ink)}
.chip.info{background:var(--accent-soft);color:var(--accent-ink)}
.chip .ic{width:14px;height:14px}
.label{font-size:11.5px;letter-spacing:var(--label-ls);text-transform:uppercase;color:var(--muted);font-weight:600}
.muted{color:var(--muted)}.sub{color:var(--sub)}
.row{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.row.between{justify-content:space-between}
.stack{display:grid;gap:16px}
.stack.tight{gap:8px}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.grid-home{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:20px}

/* ---- cards (override global-ui's full-height card) ---- */
.card{display:block;height:auto;background:var(--surface);border:var(--card-border);border-radius:var(--radius);box-shadow:var(--shadow);overflow:visible;position:relative;min-width:0}
.card.pad{padding:20px}
.card.clip{overflow:hidden}
.card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px;flex-wrap:wrap}
.card-foot{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}
a.card{text-decoration:none;color:inherit;transition:box-shadow .15s}
a.card:hover{box-shadow:var(--shadow-pop)}

/* ---- avatars ---- */
.av{width:36px;height:36px;border-radius:var(--av-radius);flex:none;object-fit:cover;background:var(--accent-soft)}
.av.ini{display:inline-grid;place-items:center;font-size:13px;font-weight:600;color:var(--accent-ink)}
.av.sm{width:28px;height:28px;font-size:11px}.av.lg{width:64px;height:64px;font-size:22px}.av.xl{width:88px;height:88px;font-size:30px}

/* ---- forms ---- */
.field{display:grid;gap:6px;min-width:0}
.field > span,.field > label{font-size:13px;font-weight:500;color:var(--sub)}
.input,.select,.textarea{width:100%;min-height:44px;border:var(--ghost-border);border-radius:8px;background:var(--surface);color:var(--ink);padding:8px 12px;font-size:16px}
.textarea{min-height:96px;resize:vertical;line-height:1.45}
.input:focus,.select:focus,.textarea:focus{outline:none;border-color:var(--accent);box-shadow:var(--focus-ring)}
.input[aria-invalid=true],.textarea[aria-invalid=true]{border-color:var(--warn)}
.hint{font-size:12.5px;color:var(--muted)}
.error{font-size:13px;color:var(--warn);display:flex;gap:6px;align-items:center}
.seg{display:inline-flex;flex-wrap:wrap;gap:6px}
.seg button{min-height:44px;padding:0 14px;border-radius:22px;border:var(--ghost-border);background:var(--surface);color:var(--sub);cursor:pointer;display:inline-flex;align-items:center;gap:6px;font-size:14px}
.seg button[aria-pressed=true]{background:var(--accent-soft);color:var(--accent-ink);border-color:var(--accent);font-weight:500}
.daypick{display:flex;flex-wrap:wrap;gap:6px}
.daypick label{position:relative}
.daypick input{position:absolute;opacity:0;inset:0;width:100%;height:100%;cursor:pointer;margin:0}
.daypick span{display:grid;place-items:center;min-width:52px;min-height:44px;border-radius:22px;border:var(--ghost-border);background:var(--surface);color:var(--sub);font-size:14px}
.daypick input:checked + span{background:var(--accent);border-color:var(--accent);color:var(--on-accent)}
.daypick input:focus-visible + span{box-shadow:var(--focus-ring)}

/* ---- teacher shell ---- */
.t-shell{display:grid;grid-template-columns:248px minmax(0,1fr);min-height:calc(100dvh - 44px)}
.side{background:var(--side-bg);border-right:var(--side-border);padding:18px 12px 18px 0;display:flex;flex-direction:column;gap:2px;position:sticky;top:44px;height:calc(100dvh - 44px);overflow-y:auto;z-index:auto}
.brand{display:flex;align-items:center;gap:10px;padding:4px 16px 18px 24px;font-family:var(--display);font-weight:500;font-size:17px;color:var(--ink);text-decoration:none}
.brand-dot{width:30px;height:30px;border-radius:9px;background:var(--accent);display:grid;place-items:center;color:var(--on-accent)}
.brand small{display:block;font-size:11px;color:var(--muted);font-weight:400;letter-spacing:.02em}
.nav{display:flex;align-items:center;gap:14px;min-height:44px;padding:0 16px 0 24px;border-radius:var(--nav-radius);color:var(--sub);font-weight:500;font-size:14.5px;text-decoration:none;z-index:auto}
.nav:hover{background:var(--neutral-soft);color:var(--ink)}
.nav.on{background:var(--nav-on-bg);color:var(--nav-on-ink)}
.nav em{margin-left:auto;font-style:normal;font-size:10.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);background:var(--neutral-soft);border-radius:8px;padding:2px 6px}
.side-card{margin:18px 12px 0 16px;border:var(--card-border);border-radius:var(--radius);overflow:hidden;background:var(--bg)}
.side-card img{width:100%;height:96px;object-fit:cover}
.side-card p{padding:10px 12px;font-size:12.5px;color:var(--sub);line-height:1.4}
.who{margin:auto 0 0;display:flex;align-items:center;gap:10px;padding:14px 12px 0 24px;font-size:13.5px;color:var(--sub)}
.who b{display:block;color:var(--ink);font-weight:500}
.main{padding:28px 32px 64px;min-width:0;max-width:1240px;width:100%}
.page-head{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;flex-wrap:wrap;margin-bottom:22px}
.page-head p{color:var(--sub);margin-top:6px}
.crumbs{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--muted);margin-bottom:8px}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--accent-ink)}

/* ---- class banner (split: text | photo, never text on photo) ---- */
.banner{display:grid;grid-template-columns:minmax(0,1fr) minmax(200px,38%);border-radius:var(--radius);overflow:hidden;background:var(--surface);border:var(--card-border);box-shadow:var(--shadow);margin-bottom:18px}
.banner .b-text{padding:22px 24px;display:grid;gap:8px;align-content:center;border-left:6px solid var(--tone,var(--accent))}
.banner img{width:100%;height:100%;min-height:160px;object-fit:cover}
.tone-accent{--tone:var(--accent);--tone-soft:var(--accent-soft);--tone-ink:var(--accent-ink)}
.tone-alt{--tone:var(--alt-ink);--tone-soft:var(--alt-soft);--tone-ink:var(--alt-ink)}
.tone-neutral{--tone:var(--muted);--tone-soft:var(--neutral-soft);--tone-ink:var(--sub)}

/* ---- tabs (Classroom-style underline) ---- */
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:20px;overflow-x:auto;scrollbar-width:none}
.tabs a,.tabs button{display:inline-flex;align-items:center;gap:8px;min-height:48px;padding:0 16px;color:var(--sub);text-decoration:none;font-weight:500;
  border:0;background:none;border-bottom:3px solid transparent;cursor:pointer;white-space:nowrap;font-size:14.5px}
.tabs a:hover,.tabs button:hover{color:var(--ink);background:var(--neutral-soft)}
.tabs .on{color:var(--accent-ink);border-bottom-color:var(--accent)}

/* ---- lists & tables ---- */
.list-row{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:12px;align-items:center;padding:10px 0;border-top:1px solid var(--line)}
.list-row:first-child{border-top:0}
.list-row b{display:block;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.list-row small{display:block;color:var(--muted);font-size:12.5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
a.list-row{color:inherit;text-decoration:none;border-radius:8px}
a.list-row:hover{background:var(--bg)}
.tbl-wrap{overflow-x:auto;border:var(--card-border);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow)}
.tbl{width:100%;border-collapse:collapse;font-size:14px;min-width:720px}
.tbl th{text-align:left;font-weight:500;color:var(--muted);font-size:12.5px;padding:0 14px;height:46px;border-bottom:1px solid var(--line);white-space:nowrap;background:var(--surface);position:sticky;top:0}
.tbl td{padding:10px 14px;border-bottom:1px solid var(--line);vertical-align:middle}
.tbl tr:last-child td{border-bottom:0}
.tbl tbody tr:hover td{background:var(--bg)}
.tbl .sort{display:inline-flex;align-items:center;gap:4px;border:0;background:none;color:inherit;font:inherit;cursor:pointer;min-height:44px;padding:0}
.tbl .sort[aria-sort] {color:var(--accent-ink)}
.tbl .who-cell{display:flex;align-items:center;gap:10px;min-width:0}
.tbl .who-cell b{font-weight:500;display:block}
.tbl .who-cell small{color:var(--muted);display:block;font-size:12px}
.score-input{width:84px;min-height:40px;text-align:center}
.filters{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:14px}
.filters .input,.filters .select{width:auto;min-width:200px}
.pill-filter{min-height:44px;padding:0 14px;border-radius:22px;border:var(--ghost-border);background:var(--surface);color:var(--sub);cursor:pointer;font-size:14px;display:inline-flex;gap:6px;align-items:center}
.pill-filter[aria-pressed=true]{background:var(--accent-soft);border-color:var(--accent);color:var(--accent-ink)}
.bar{width:72px;height:6px;border-radius:9px;background:var(--track);overflow:hidden;display:inline-block;vertical-align:middle}
.bar i{display:block;height:100%;background:var(--accent);border-radius:9px}
.stat{display:grid;gap:2px}
.stat b{font-size:28px;font-weight:500;font-family:var(--display);line-height:1.1}
.stat span{font-size:13px;color:var(--muted)}

/* ---- feed ---- */
.composer{display:flex;align-items:center;gap:12px;padding:12px 16px}
.composer button.fake-input{flex:1;text-align:left;min-height:48px;border:0;background:transparent;color:var(--muted);font-size:15px;cursor:pointer;border-radius:24px;padding:0 12px}
.composer button.fake-input:hover{background:var(--bg);color:var(--accent-ink)}
.post{padding:16px 18px;display:grid;gap:12px}
.post-head{display:grid;grid-template-columns:44px minmax(0,1fr) auto;gap:12px;align-items:center}
.post-ic{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;background:var(--accent-soft);color:var(--accent-ink)}
.post-ic.hw{background:var(--alt-soft);color:var(--alt-ink)}
.post-ic.upd{background:var(--neutral-soft);color:var(--sub)}
.post-title{font-weight:500;overflow-wrap:anywhere}
.post-meta{font-size:12.5px;color:var(--muted)}
.post-body{color:var(--sub);white-space:pre-line;overflow-wrap:anywhere}
.attach{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:12px;align-items:center;border:var(--card-border);border-radius:10px;padding:10px 12px;background:var(--surface)}
.attach .thumb{width:44px;height:44px;border-radius:8px;display:grid;place-items:center;background:var(--bg);color:var(--accent-ink)}
.attach b{display:block;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.attach small{display:block;font-size:12.5px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.embed{border:var(--card-border);border-radius:10px;overflow:hidden;background:var(--bg)}
.embed iframe{display:block;width:100%;height:420px;border:0;background:var(--surface)}
.embed-bar{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:6px 8px 6px 12px;font-size:12.5px;color:var(--muted);border-top:1px solid var(--line);flex-wrap:wrap}

/* ---- modal ---- */
.modal-overlay{background:var(--scrim);padding:16px;align-items:center}
.modal{background:var(--surface);border-radius:16px;box-shadow:var(--shadow-pop);width:min(560px,100%);max-height:calc(100dvh - 32px);display:flex;flex-direction:column;overflow:hidden}
.modal.wide{width:min(880px,100%)}
.modal-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 12px 10px 22px;border-bottom:1px solid var(--line)}
.modal-body{padding:18px 22px;overflow-y:auto;display:grid;gap:14px}
.modal-foot{display:flex;justify-content:flex-end;gap:8px;padding:12px 22px 16px;border-top:1px solid var(--line);flex-wrap:wrap}

/* ---- invite card (ClassIn pattern: link + code + QR) ---- */
.invite{display:grid;grid-template-columns:minmax(0,1fr) 180px;gap:18px;align-items:center;border:var(--card-border);border-radius:var(--radius);padding:18px;background:var(--bg)}
.invite .code{font-family:var(--display);font-size:30px;letter-spacing:.12em;font-weight:500;color:var(--accent-ink)}
.invite .qr{background:var(--surface);border-radius:10px;padding:8px;border:var(--card-border)}
.invite .qr svg{display:block;width:100%;height:auto}
.copy-row{display:flex;gap:8px}
.copy-row .input{font-size:14px;color:var(--sub)}

/* ---- week calendar ---- */
.wk-wrap{overflow-x:auto;border:var(--card-border);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow)}
.wk{display:grid;grid-template-columns:repeat(7,minmax(118px,1fr));min-width:840px}
.wk-day{border-left:1px solid var(--line);min-height:360px;display:flex;flex-direction:column}
.wk-day:first-child{border-left:0}
.wk-day header{padding:12px 10px;border-bottom:1px solid var(--line);text-align:center}
.wk-day header b{display:block;font-size:22px;font-weight:500;font-family:var(--display)}
.wk-day header span{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
.wk-day.today header b{background:var(--accent);color:var(--on-accent);border-radius:50%;width:40px;height:40px;display:grid;place-items:center;margin:2px auto 0}
.wk-day.today header span{color:var(--accent-ink)}
.wk-list{display:grid;gap:8px;padding:10px 8px;align-content:start}
.sess{display:block;width:100%;text-align:left;border:0;border-left:4px solid var(--tone);border-radius:var(--sess-radius);padding:8px 10px;background:var(--tone-soft);color:var(--tone-ink);
  font-size:13px;line-height:1.3;cursor:pointer;min-height:44px}
.sess b{display:block;font-weight:500}
.sess:hover{box-shadow:var(--shadow-pop)}
.wk-strip{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:8px}
.wk-strip .d{font-size:12px;color:var(--muted);text-align:center;font-weight:500;margin-bottom:6px}
.wk-strip .d.now{color:var(--accent-ink)}
.wk-strip .sess{font-size:11.5px;padding:6px;min-height:0;cursor:default}

/* ---- empty state ---- */
.empty{display:grid;justify-items:center;text-align:center;gap:10px;padding:28px 16px;color:var(--sub)}
.empty img{width:min(220px,70%);height:auto}

/* ---- preview stamp for "coming next" screens ---- */
.stamp{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:22px;background:var(--warn-soft);color:var(--warn);font-weight:500;font-size:13.5px;border:1px dashed var(--warn)}

/* ---- student (phone) shell ---- */
.s-shell{max-width:480px;margin:0 auto;min-height:calc(100dvh - 44px);display:flex;flex-direction:column;background:var(--bg);box-shadow:0 0 0 1px var(--line)}
.s-top{display:flex;align-items:center;gap:8px;padding:10px 12px 10px 16px;background:var(--surface);border-bottom:1px solid var(--line);position:sticky;top:44px;z-index:var(--z-nav)}
.s-top h1{font-size:18px;line-height:1.2;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.s-top small{display:block;font-size:12.5px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.s-top .grow{flex:1;min-width:0}
.s-main{padding:14px 14px 96px;display:grid;gap:14px;align-content:start;flex:1}
.s-main > *{min-width:0}
.s-nav{position:fixed;left:0;right:0;bottom:0;z-index:var(--z-nav);display:flex;justify-content:center;background:var(--surface);border-top:1px solid var(--line)}
.s-nav div{display:grid;grid-template-columns:repeat(3,1fr);width:100%;max-width:480px}
.s-nav a{display:grid;justify-items:center;gap:2px;padding:8px 0 10px;min-height:56px;color:var(--muted);text-decoration:none;font-size:12px;font-weight:500}
.s-nav a.on{color:var(--accent-ink)}
.s-nav a.on .ic{background:var(--accent-ink)}
.s-banner{display:grid;grid-template-columns:minmax(0,1fr) 112px;border-radius:var(--radius);overflow:hidden;background:var(--surface);border:var(--card-border);box-shadow:var(--shadow)}
.s-banner .b-text{padding:14px 16px;display:grid;gap:4px;align-content:center;border-left:5px solid var(--tone,var(--accent))}
.s-banner img{width:100%;height:100%;min-height:110px;object-fit:cover}
.progress{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--sub);font-weight:500}
.progress .track{flex:1;height:8px;border-radius:9px;background:var(--track);overflow:hidden}
.progress .track i{display:block;height:100%;background:var(--accent);border-radius:9px;transition:width .2s}
.q-card{padding:18px}
.q-card .prompt{font-size:17px;line-height:1.45;font-weight:500;margin:8px 0 14px;color:var(--ink);overflow-wrap:anywhere}
.opts{display:grid;gap:10px}
.opt{display:flex;align-items:center;gap:12px;min-height:52px;padding:8px 14px;border-radius:var(--opt-radius);border:var(--opt-border);background:var(--surface);font-size:16px;color:var(--ink);cursor:pointer;text-align:left;width:100%}
.opt i{width:26px;height:26px;border-radius:50%;border:1.5px solid var(--muted);display:grid;place-items:center;font-style:normal;font-size:12px;color:var(--muted);flex:none}
.opt[aria-checked=true]{border-color:var(--accent);background:var(--accent-soft)}
.opt[aria-checked=true] i{background:var(--accent);border-color:var(--accent);color:var(--on-accent)}
.match-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);gap:10px;align-items:center;padding:6px 0;border-top:1px solid var(--line)}
.match-row:first-child{border-top:0}
.match-row b{font-weight:500;overflow-wrap:anywhere}
.gap-text{font-size:17px;line-height:2.4;overflow-wrap:anywhere}
.gap-input{display:inline-block;width:9.5em;max-width:100%;min-height:40px;border:0;border-bottom:2px solid var(--accent);border-radius:6px 6px 0 0;background:var(--accent-soft);padding:2px 8px;font-size:16px;color:var(--ink);vertical-align:baseline}
.gap-input:focus{outline:none;box-shadow:var(--focus-ring)}
.lb-row{display:grid;grid-template-columns:32px 40px minmax(0,1fr) auto;gap:10px;align-items:center;min-height:56px;padding:6px 4px;border-top:1px solid var(--line)}
.lb-row:first-child{border-top:0}
.lb-row .rk{font-weight:600;color:var(--muted);text-align:center;font-size:16px}
.lb-row.me{background:var(--accent-soft);border-radius:10px;border-top-color:transparent}
.lb-row.me .rk{color:var(--accent-ink)}
.lb-row .pts{font-weight:600;color:var(--accent-ink)}
.result-score{font-family:var(--display);font-size:56px;line-height:1;font-weight:500}
.review-row{display:grid;grid-template-columns:24px minmax(0,1fr);gap:10px;padding:10px 0;border-top:1px solid var(--line);font-size:14.5px}
.review-row:first-child{border-top:0}
.review-row .ok{color:var(--alt-ink)}.review-row .no{color:var(--warn)}

/* ---- skill chart (dataviz spec: ≤24px bars, 4px rounded ends, hairline grid, text tokens) ---- */
.viz{position:relative}
.viz svg{display:block;width:100%;height:auto;overflow:visible}
.viz .grid-line{stroke:var(--line);stroke-width:1}
.viz .axis-t{fill:var(--muted);font-size:12px;font-family:var(--body)}
.viz .cat-t{fill:var(--sub);font-size:13px;font-family:var(--body)}
.viz .val-t{fill:var(--ink);font-size:13px;font-weight:500;font-family:var(--body)}
.viz .bar-m{fill:var(--viz-latest)}
.viz .prev-m{stroke:var(--viz-prev);stroke-width:2;stroke-linecap:round}
.viz .hit{fill:transparent;cursor:default}
.viz .hit:focus{outline:none}
.viz g.row-g.hover .bar-m{opacity:.85}
.viz-legend{display:flex;gap:16px;flex-wrap:wrap;font-size:12.5px;color:var(--sub);margin-top:6px}
.viz-legend span{display:inline-flex;align-items:center;gap:6px}
.viz-legend .key-bar{width:14px;height:10px;border-radius:2px;background:var(--viz-latest)}
.viz-legend .key-tick{width:3px;height:14px;border-radius:2px;background:var(--viz-prev)}
.viz-tip{position:absolute;pointer-events:none;background:var(--surface);border:var(--card-border);box-shadow:var(--shadow-pop);border-radius:10px;padding:8px 10px;font-size:12.5px;color:var(--sub);white-space:nowrap;z-index:var(--z-tooltip)}
.viz-tip b{color:var(--ink);font-weight:600}

/* ---- role picker / login ---- */
.split-hero{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);min-height:calc(100dvh - 44px)}
.split-hero .pane{padding:48px clamp(16px,5vw,64px);display:grid;align-content:center;gap:22px}
.split-hero .photo{position:relative;overflow:hidden}
.split-hero .photo img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.role-card{display:grid;grid-template-columns:56px minmax(0,1fr) auto;gap:16px;align-items:center;padding:18px 20px;text-decoration:none;color:inherit}
.role-card .role-ic{width:56px;height:56px;border-radius:16px;display:grid;place-items:center;background:var(--accent-soft);color:var(--accent-ink)}
.role-card.alt .role-ic{background:var(--alt-soft);color:var(--alt-ink)}

/* ---- responsive ---- */
@media (max-width:1100px){
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid-home{grid-template-columns:1fr}
}
@media (max-width:900px){
  .t-shell{grid-template-columns:minmax(0,1fr)}
  .side{position:static;height:auto;flex-direction:row;align-items:center;overflow-x:auto;padding:8px 12px;border-right:0;border-bottom:var(--side-border);gap:4px;scrollbar-width:thin}
  .brand{padding:0 8px 0 4px;white-space:nowrap}
  .brand small{display:none}
  .nav{padding:0 14px;border-radius:22px;white-space:nowrap}
  .nav em{margin-left:6px}
  .side-card,.who span.who-text{display:none}
  .who{margin:0 0 0 auto;padding:0 4px}
  .main{padding:20px 16px 56px}
  .banner{grid-template-columns:1fr}
  .banner img{max-height:150px;min-height:0;order:-1}
  .split-hero{grid-template-columns:1fr}
  .split-hero .photo{min-height:220px;order:-1}
  .invite{grid-template-columns:1fr}
  .invite .qr{max-width:220px;justify-self:center}
}
@media (max-width:640px){
  .grid-2,.grid-3{grid-template-columns:1fr}
  h1{font-size:22px}
  .card.pad{padding:16px}
  .filters .input,.filters .select{min-width:0;flex:1 1 160px}
  .modal-body{padding:16px}
  .page-head .btn{flex:1 1 auto}
  .tbl{font-size:13.5px}
}

/* ---- fake Drive preview + picker ---- */
.doc-prev{display:grid;gap:12px;background:var(--neutral-soft);border-radius:10px;padding:14px}
.doc-tag{display:flex;align-items:center;gap:6px;font-size:12.5px;color:var(--sub)}
.doc-page{background:var(--surface);border:var(--card-border);border-radius:6px;padding:22px 24px;display:grid;gap:8px;box-shadow:var(--shadow)}
.doc-page.kind-slides{aspect-ratio:16/9;align-content:center;border-top:6px solid var(--accent)}
.doc-lines{display:grid;gap:6px;margin-top:6px}
.doc-lines i{display:block;height:8px;border-radius:4px;background:var(--line)}
.doc-lines i.short{width:62%}
.picker{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:16px;min-height:320px;min-width:0}
.picker-list{display:grid;gap:4px;align-content:start}
.picker-list .label{margin:8px 0 2px}
.pick{display:grid;grid-template-columns:24px minmax(0,1fr);gap:10px;align-items:center;text-align:left;border:1px solid transparent;border-radius:10px;background:transparent;padding:8px 10px;cursor:pointer;color:var(--ink);min-height:52px}
.pick:hover{background:var(--bg)}
.pick[aria-selected=true]{background:var(--accent-soft);border-color:var(--accent)}
.pick b{display:block;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.pick small{display:block;color:var(--muted);font-size:12px}
.picker-prev{min-width:0}
.cover-img{width:100%;height:150px;object-fit:cover}
.hl{font-style:normal;color:var(--accent-ink)}
@media (max-width:640px){
  .picker{grid-template-columns:minmax(0,1fr)}
  .attach{grid-template-columns:auto minmax(0,1fr)}
  .attach > .row{grid-column:1 / -1}
  .post-head{grid-template-columns:44px minmax(0,1fr)}
}

/* ---- attendance rows ---- */
.att-row{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:12px;align-items:center;padding:10px 0;border-top:1px solid var(--line)}
.att-row:first-child{border-top:0}
.att-row b{display:block;font-weight:500}
.att-row small{display:block;color:var(--muted);font-size:12.5px}
.seg button[data-mark=present][aria-pressed=true]{background:var(--alt-soft);color:var(--alt-ink);border-color:var(--alt-ink)}
.seg button[data-mark=absent][aria-pressed=true]{background:var(--warn-soft);color:var(--warn);border-color:var(--warn)}
/* ---- homework builder ---- */
.q-edit{display:grid;gap:12px;padding:18px}
.q-edit-head{display:flex;align-items:center;justify-content:space-between;gap:8px}
.opt-edit{display:grid;grid-template-columns:44px minmax(0,1fr);gap:8px;align-items:center}
.opt-edit label.radio{display:grid;place-items:center;min-height:44px;cursor:pointer}
.pair-edit{display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr) 44px;gap:8px;align-items:center}
.gap-preview{background:var(--bg);border-radius:8px;padding:10px 12px;font-size:15px;color:var(--sub)}
.gap-preview u{text-decoration:none;display:inline-block;min-width:64px;border-bottom:2px solid var(--accent);margin:0 2px}
.builder-bar{position:sticky;bottom:0;z-index:var(--z-nav);display:flex;gap:10px;flex-wrap:wrap;justify-content:space-between;align-items:center;padding:12px 16px;background:var(--surface);border:var(--card-border);border-radius:var(--radius);box-shadow:var(--shadow-pop);margin-top:16px}
@media (max-width:640px){
  .att-row{grid-template-columns:auto minmax(0,1fr)}
  .att-row .seg{grid-column:1 / -1}
  .pair-edit{grid-template-columns:minmax(0,1fr) 44px}
  .pair-edit .pair-arrow{display:none}
  .pair-edit input:nth-of-type(2){grid-column:1}
}
.picker.page{grid-template-columns:minmax(0,1fr) minmax(0,1.4fr)}
@media (max-width:640px){ .picker.page{grid-template-columns:minmax(0,1fr)} }
/* ---- create previews ---- */
.game-stage{display:grid;gap:16px;justify-items:center;text-align:center;padding:24px 16px;background:var(--wash),var(--bg);border-radius:var(--radius)}
.game-char{position:relative;width:88px;height:88px}
.game-char img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain}
.game-char img.face{inset:22%;width:56%;height:56%}
.game-opts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;width:100%;max-width:640px}
.game-opt{display:grid;justify-items:center;gap:8px;padding:12px 8px;border-radius:var(--radius);border:var(--card-border);background:var(--surface);cursor:pointer;min-height:44px;font-size:15px;color:var(--ink)}
.game-opt:hover{box-shadow:var(--shadow-pop)}
.game-opt[data-state=right]{background:var(--alt-soft);border-color:var(--alt-ink)}
.game-opt[data-state=wrong]{background:var(--warn-soft);border-color:var(--warn)}
@media (max-width:640px){ .game-opts{grid-template-columns:1fr} .game-opt{grid-template-columns:56px 1fr;justify-items:start;align-items:center;text-align:left} .game-opt .game-char{width:56px;height:56px} }
/* aspect-ratio boxes must not push their grid column wider than the phone (Drive preview, 2026-09-14) */
.picker-prev.stack{grid-template-columns:minmax(0,1fr)}
.doc-prev,.doc-page{min-width:0}
@media (max-width:640px){ .doc-page.kind-slides{aspect-ratio:auto} }

/* ==========================================================================
   Round 2 (2026-09-15): 4-button home, hub links, logo grid, social feed,
   hand-ins, private comments, check-ins, panel (version E). Tokens only.
   ========================================================================== */
/* ---- hub links (what sits under each Home button) ---- */
.hub-links{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}
.hub-link{display:flex;align-items:center;gap:10px;min-height:52px;padding:6px 14px 6px 12px;border:var(--card-border);border-radius:var(--radius);background:var(--surface);color:var(--sub);text-decoration:none;box-shadow:var(--shadow);min-width:0}
.hub-link b{display:block;font-weight:500;color:var(--ink);font-size:14px}
.hub-link small{display:block;font-size:12px;color:var(--muted)}
.hub-link:hover{border-color:var(--accent)}
.hub-link.on{background:var(--accent-soft);border-color:var(--accent);color:var(--accent-ink)}
@media (max-width:640px){.hub-links{flex-wrap:nowrap;overflow-x:auto;padding-bottom:4px}.hub-link{flex:none}}

/* ---- home: 4 big buttons ---- */
.big-btns{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-bottom:20px}
.big-btn{display:grid;gap:4px;align-content:start;padding:20px;min-height:150px;border-radius:16px;background:var(--surface);border:var(--card-border);box-shadow:var(--shadow);text-decoration:none;color:var(--ink);transition:box-shadow .15s,transform .15s}
.big-btn:hover{box-shadow:var(--shadow-pop);transform:translateY(-2px)}
.big-btn .big-ic{width:56px;height:56px;border-radius:16px;display:grid;place-items:center;background:var(--accent-soft);color:var(--accent-ink);margin-bottom:8px}
.big-btn:nth-child(2) .big-ic{background:var(--alt-soft);color:var(--alt-ink)}
.big-btn:nth-child(3) .big-ic{background:var(--warn-soft);color:var(--warn)}
.big-btn:nth-child(4) .big-ic{background:var(--neutral-soft);color:var(--sub)}
.big-btn b{font-family:var(--display);font-weight:500;font-size:20px}
.big-btn small{color:var(--muted);font-size:13px;line-height:1.4}
@media (prefers-reduced-motion:reduce){.big-btn{transition:none}.big-btn:hover{transform:none}}
@media (max-width:900px){.big-btns{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.big-btn{min-height:0;padding:16px}.big-btn .big-ic{width:48px;height:48px}}

/* ---- tool logos (Simple Icons drawn as a mask in the brand colour token) ---- */
.logo{display:inline-block;width:28px;height:28px;flex:none;background:var(--logo-c,var(--sub));-webkit-mask:var(--logo) center/contain no-repeat;mask:var(--logo) center/contain no-repeat}
.logo.lg{width:40px;height:40px}.logo.sm{width:18px;height:18px}
.logo.letter{-webkit-mask:none;mask:none;background:var(--neutral-soft);color:var(--sub);border-radius:8px;display:inline-grid;place-items:center;font-weight:600;font-size:12px;letter-spacing:-.02em}
.logo.letter.lg{font-size:16px;border-radius:12px}
.logo.letter.sm{font-size:9px;border-radius:5px}
.attach .thumb .logo{width:24px;height:24px}
.attach .thumb .logo.letter{font-size:10px}
.logo-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(168px,1fr));gap:12px}
.tool-tile{display:grid;justify-items:center;align-content:start;text-align:center;gap:6px;padding:16px 10px 12px;background:var(--surface);border:var(--card-border);border-radius:var(--radius);box-shadow:var(--shadow);min-width:0}
.tool-tile b{font-weight:500}
.tool-tile small{color:var(--muted);font-size:12px;line-height:1.35}
.tool-tile .btn{width:100%;padding:0 10px}
.tool-tile[data-state=connected]{border-color:var(--alt-ink);background:linear-gradient(var(--alt-soft),var(--surface) 55%)}
.group-h{margin:22px 0 10px;display:flex;align-items:center;gap:8px}
@media (max-width:640px){.logo-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}

/* ---- drawer + fake consent screen ---- */
.modal-overlay.drawer-overlay{justify-content:flex-end;align-items:stretch;padding:0}
.modal.drawer{width:min(440px,100%);max-height:100dvh;height:100dvh;border-radius:16px 0 0 16px}
.drawer-row{display:grid;grid-template-columns:40px minmax(0,1fr) auto;gap:12px;align-items:center;padding:8px 0;border-top:1px solid var(--line)}
.drawer-row b{display:block;font-weight:500}.drawer-row small{display:block;color:var(--muted);font-size:12px}
.consent{display:grid;gap:12px;justify-items:center;text-align:center}
.consent-top{display:flex;align-items:center;gap:14px;color:var(--muted)}
.consent ul{text-align:left;margin:0;padding-left:20px;display:grid;gap:6px;color:var(--sub);justify-self:stretch}

/* ---- social feed ---- */
.post{gap:10px}
.post-head .av{width:44px;height:44px;font-size:15px}
.post-head > .chip{align-self:start}
.post-h{font-size:17px;line-height:1.35;overflow-wrap:anywhere}
.post.announce{overflow:hidden;padding-top:0;border-color:var(--warn)}
.announce-bar{display:flex;align-items:center;gap:8px;margin:0 -18px;padding:8px 18px;background:var(--warn-soft);color:var(--warn);font-weight:600;font-size:12.5px;letter-spacing:.05em;text-transform:uppercase}
.topic-tag{display:inline-flex;align-items:center;gap:4px;color:var(--accent-ink)}
.topic-tag .ic{width:14px;height:14px}
.mention{color:var(--accent-ink);background:var(--accent-soft);border-radius:6px;padding:0 4px;font-weight:500}
.react-bar{display:flex;align-items:center;gap:4px;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:6px}
.react{display:inline-flex;align-items:center;gap:6px;min-height:44px;padding:0 12px;border-radius:22px;border:1px solid transparent;background:transparent;color:var(--sub);font-size:13.5px;cursor:pointer}
.react:hover{background:var(--neutral-soft)}
.react[aria-pressed=true]{background:var(--accent-soft);color:var(--accent-ink);border-color:var(--accent)}
.react b{font-weight:600}
.react-sum{margin-left:auto;font-size:12.5px;color:var(--muted)}
.replies{display:grid;gap:8px}
.replies > .btn.quiet{justify-self:start}
.reply{display:grid;grid-template-columns:28px minmax(0,1fr);gap:8px;align-items:start}
.reply-bubble{background:var(--bg);border-radius:4px 14px 14px 14px;padding:8px 12px;min-width:0}
.reply-bubble b{display:flex;align-items:center;gap:6px;flex-wrap:wrap;font-weight:500;font-size:13.5px}
.reply-bubble p{font-size:14.5px;overflow-wrap:anywhere;color:var(--ink)}
.reply-bubble small{font-size:11.5px;color:var(--muted)}
.reply.mine .reply-bubble{background:var(--accent-soft)}
.reply-form{display:grid;grid-template-columns:auto minmax(0,1fr) 44px;gap:8px;align-items:center}
.reply-form .input{border-radius:22px}
.reply-form .send{color:var(--accent-ink)}
.reply-form[data-pc-form]{grid-template-columns:minmax(0,1fr) 44px}
.mention-pick{display:flex;gap:6px;flex-wrap:wrap;padding-left:36px}
.carousel{display:grid;gap:4px;min-width:0}
.car-track{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(220px,58%);gap:12px;overflow-x:auto;scroll-snap-type:x mandatory;scroll-behavior:smooth;padding:2px 2px 8px;overscroll-behavior-x:contain;scrollbar-width:thin}
.vcard{scroll-snap-align:start;display:grid;gap:6px;align-content:start;padding:16px;border-radius:14px;border:var(--card-border);background:var(--wash),var(--surface);min-height:168px;min-width:0}
.vcard-w{font-family:var(--display);font-size:22px;font-weight:500;color:var(--accent-ink);overflow-wrap:anywhere;line-height:1.2}
.vcard-m{color:var(--sub)}
.vcard-ex{font-size:14px;color:var(--ink);font-style:italic}
.car-nav{display:flex;align-items:center;justify-content:center;gap:10px}
@media (prefers-reduced-motion:reduce){.car-track{scroll-behavior:auto}.poll-fill{transition:none}}
@media (max-width:640px){.car-track{grid-auto-columns:86%}}
.tip-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px}
.tip-box{display:grid;gap:4px;align-content:start;padding:12px 14px;border-radius:12px;background:var(--bg);border-left:4px solid var(--accent)}
.tip-box:nth-child(2){border-left-color:var(--alt-ink)}
.tip-h{font-family:var(--display);font-size:19px;font-weight:500}
.tip-box p{font-size:14px}
.mistake{display:grid;gap:6px}
.mistake p{display:flex;gap:8px;align-items:flex-start;padding:8px 12px;border-radius:10px;font-size:15px;overflow-wrap:anywhere}
.mistake .no{background:var(--warn-soft);color:var(--warn)}
.mistake .ok{background:var(--alt-soft);color:var(--alt-ink)}
.mistake .ic{margin-top:3px}
.cue{display:grid;gap:6px;padding:16px 18px;border-radius:12px;border:2px dashed var(--line-strong);background:var(--bg)}
.cue b{font-size:17px;font-weight:500}
.cue ul{margin:0;padding-left:20px;color:var(--sub);display:grid;gap:2px}
.poll{display:grid;gap:8px}
.poll-opt{position:relative;display:flex;align-items:center;justify-content:space-between;gap:10px;min-height:44px;padding:0 14px;border-radius:10px;border:var(--opt-border);background:var(--surface);color:var(--ink);font-size:15px;overflow:hidden;text-align:left;width:100%}
button.poll-opt{cursor:pointer}
.poll-opt[aria-pressed=true]{border-color:var(--accent)}
.poll-fill{position:absolute;inset:0 auto 0 0;background:var(--accent-soft);transition:width .3s}
.poll-t,.poll-n{position:relative;display:inline-flex;align-items:center;gap:6px}
.poll-n{font-weight:600;color:var(--accent-ink)}
.photo-grid{display:grid;gap:6px;border-radius:12px;overflow:hidden}
.photo-grid img{width:100%;max-height:360px;object-fit:cover}
.topic-row{display:flex;gap:8px;overflow-x:auto;padding-bottom:4px;scrollbar-width:thin}
.topic-row .pill-filter{white-space:nowrap;flex:none;text-decoration:none}
.pill-filter[aria-current=page]{background:var(--accent-soft);border-color:var(--accent);color:var(--accent-ink)}
.tabs .logo{width:18px;height:18px}
.tool-head{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.tool-head .grow{flex:1;min-width:0}

/* ---- hand-ins ---- */
.handins{display:grid;gap:8px}
.handin{display:grid;grid-template-columns:64px minmax(0,1fr) auto;gap:12px;align-items:center}
.handin img,.handin .thumb{width:64px;height:64px;border-radius:8px;object-fit:cover;display:grid;place-items:center;background:var(--bg);color:var(--accent-ink)}
.handin b{display:block;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.handin small{display:block;color:var(--muted);font-size:12.5px}
.file-btn{cursor:pointer;justify-self:start}
.ho-cell{display:flex;gap:6px;align-items:center;flex-wrap:wrap}
.ho-thumb{width:44px;height:44px;border-radius:8px;overflow:hidden;border:var(--card-border);padding:0;background:var(--bg);cursor:pointer;display:grid;place-items:center;color:var(--accent-ink)}
.ho-thumb img{width:100%;height:100%;object-fit:cover}
.handin-big{width:100%;max-height:60dvh;object-fit:contain;border-radius:10px;background:var(--bg)}

/* ---- check-ins + feedback summary ---- */
.level-seg{display:flex}
.level-seg button{flex:1 1 auto;justify-content:center}
.level-seg button[data-level=easy][aria-pressed=true]{background:var(--alt-soft);color:var(--alt-ink);border-color:var(--alt-ink)}
.level-seg button[data-level=hard][aria-pressed=true]{background:var(--warn-soft);color:var(--warn);border-color:var(--warn)}
.check-row{display:flex;align-items:center;gap:10px;min-height:44px;cursor:pointer;color:var(--sub);font-size:14.5px}
.checkin-done{display:flex;gap:12px;align-items:center;color:var(--alt-ink)}
.checkin-done b{color:var(--ink);font-weight:500}
.fb-bars{display:grid;gap:10px}
.fb-row{display:grid;grid-template-columns:110px minmax(0,1fr) 40px;gap:10px;align-items:center;font-size:14px}
.fb-track{height:12px;border-radius:9px;background:var(--track);overflow:hidden}
.fb-track i{display:block;height:100%;border-radius:9px;background:var(--accent)}
.fb-row.easy .fb-track i{background:var(--alt-ink)}
.fb-row.hard .fb-track i{background:var(--warn)}

/* ---- version E: class panel + A/E test page ---- */
.panel-shell{max-width:460px;margin:0 auto;padding:12px 16px 40px;display:grid;gap:12px}
.panel-top{display:flex;align-items:center;gap:10px}
.panel-top b{display:block;font-family:var(--display);font-weight:500;font-size:17px}
.panel-top small{display:block;color:var(--muted);font-size:12px}
.panel-top .grow{flex:1;min-width:0}
.ae-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.ae-steps{margin:0;padding-left:22px;display:grid;gap:8px;color:var(--sub)}
@media (max-width:640px){
  .post-head > .chip{grid-column:2;justify-self:start;margin-top:-6px}
  .react{padding:0 8px;gap:4px}
  .react-bar{gap:2px}
}
@media (max-width:640px){.ae-grid{grid-template-columns:1fr}.fb-row{grid-template-columns:84px minmax(0,1fr) 32px}.big-btn b{font-size:17px}}