/* vendored — no CDN at the venue, ever */
@font-face{font-family:"Instrument Sans";font-weight:700;font-display:swap;
  src:url("fonts/instrument-sans-latin-700-normal.woff2") format("woff2")}
@font-face{font-family:"Instrument Sans";font-weight:400;font-display:swap;
  src:url("fonts/instrument-sans-latin-400-normal.woff2") format("woff2")}
@font-face{font-family:"Instrument Sans";font-weight:500;font-display:swap;
  src:url("fonts/instrument-sans-latin-500-normal.woff2") format("woff2")}
@font-face{font-family:"Instrument Sans";font-weight:600;font-display:swap;
  src:url("fonts/instrument-sans-latin-600-normal.woff2") format("woff2")}

/* THINK FIRST — instrument reading paper.
   Graphite neutrals · one signal cobalt · one family, weight is hierarchy. */

:root{
  --g950:#101319; --g800:#232936; --g600:#5A6472; --g400:#9AA3B0;
  --paper:#FAFBFC; --card:#FFFFFF; --line:#E3E7ED;
  --signal:#2E5BFF; --signal-ink:#1E3FCC; --wash:#EAF0FF;
  --ok:#0E9F6E; --ok-wash:#E4F5EE;
  --hold:#E9A23B; --hold-wash:#FCF3E3;
  --flag:#D64545; --flag-wash:#FBEAEA;
  --r:14px; --r-sm:9px;
  --display:"Instrument Sans",ui-sans-serif,system-ui,sans-serif;
  --body:"Instrument Sans",ui-sans-serif,system-ui,sans-serif;
  --shadow:0 1px 2px rgba(16,19,25,.05),0 8px 24px -12px rgba(16,19,25,.10);
  /* legacy token aliases (transcript markup etc.) */
  --ink:var(--g950); --marker:var(--signal); --soft:#EEF1F5;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--g950);
  font-family:var(--body);font-size:15px;line-height:1.5;
  -webkit-font-smoothing:antialiased}
h1,h2,h3,.num{font-family:var(--display);font-weight:600;
  letter-spacing:-.015em;margin:0}
a{color:var(--signal);text-decoration:none}
a:hover{text-decoration:underline}
:focus-visible{outline:2px solid var(--signal);outline-offset:2px;border-radius:4px}
@media (prefers-reduced-motion: reduce){*{animation:none!important;transition:none!important}}

/* ---------- shell ---------- */
.tf-topbar{position:sticky;top:0;z-index:50;background:rgba(250,251,252,.86);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.tf-topbar-inner{max-width:1280px;margin:0 auto;padding:12px 24px;
  display:flex;align-items:center;gap:16px}
.tf-wordmark{font-family:var(--display);font-weight:700;font-size:16px;
  letter-spacing:.04em;color:var(--g950)}
.tf-wordmark span{color:var(--signal)}
.tf-wordmark:hover{text-decoration:none;color:var(--g950)}
.tf-topbar-sub{color:var(--g600);font-size:13px;font-weight:500}
.tf-topbar-right{margin-left:auto;display:flex;align-items:center;gap:10px;
  font-size:13px;color:var(--g600)}
.tf-main{max-width:1280px;margin:0 auto;padding:28px 24px 80px}

/* ---------- primitives ---------- */
.kicker{font-family:var(--body);font-size:11px;font-weight:600;
  letter-spacing:.12em;text-transform:uppercase;color:var(--g600)}
.eyebrow{font-size:11px;font-weight:600;letter-spacing:.12em;
  text-transform:uppercase;color:var(--signal)}
.card{background:var(--card);border:1px solid var(--line);
  border-radius:var(--r);box-shadow:var(--shadow)}
.card-pad{padding:20px 22px}
.hairline{border:0;border-top:1px solid var(--line);margin:0}
.chip{display:inline-flex;align-items:center;gap:6px;padding:3px 10px;
  border-radius:999px;font-size:12px;font-weight:600;line-height:1.6}
.chip-signal{background:var(--wash);color:var(--signal-ink)}
.chip-ok{background:var(--ok-wash);color:var(--ok)}
.chip-hold{background:var(--hold-wash);color:#9A6A1B}
.chip-flag{background:var(--flag-wash);color:var(--flag)}
.chip-g{background:#EEF1F5;color:var(--g600)}
.num{font-variant-numeric:tabular-nums}
.note{color:var(--g600);font-size:13px}
details.tf-notes>summary{cursor:pointer;list-style:none;
  font-size:12px;font-weight:600;color:var(--g600)}
details.tf-notes>summary::before{content:"▸ ";color:var(--g400)}
details[open].tf-notes>summary::before{content:"▾ "}
details.tf-notes>div{margin-top:8px;font-size:13.5px;color:var(--g800);
  border-left:2px solid var(--wash);padding-left:12px}

/* buttons */
.btn-tf{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--signal);color:#fff;border:0;border-radius:10px;
  font-family:var(--body);font-weight:600;font-size:15px;
  padding:11px 18px;cursor:pointer;transition:background .12s}
.btn-tf:hover{background:var(--signal-ink);color:#fff;text-decoration:none}
.btn-quiet{display:inline-flex;align-items:center;justify-content:center;
  background:#fff;color:var(--g800);border:1px solid var(--line);
  border-radius:10px;font-weight:600;font-size:14px;padding:9px 16px;
  cursor:pointer;transition:border-color .12s}
.btn-quiet:hover{border-color:var(--g400);color:var(--g950);text-decoration:none}
.btn-sm{padding:5px 12px;font-size:12.5px;border-radius:8px}

/* pills = pipeline statuses */
.pill{display:inline-block;padding:2px 10px;border-radius:999px;
  font-size:11.5px;font-weight:700;letter-spacing:.03em}
.pill-UPLOADED{background:var(--hold-wash);color:#9A6A1B}
.pill-TRANSCRIBED{background:var(--wash);color:var(--signal-ink)}
.pill-ANALYZED{background:var(--ok-wash);color:var(--ok)}
.pill-REPORTED{background:var(--g950);color:#fff}
.pill-FAILED{background:var(--flag-wash);color:var(--flag)}

/* ---------- KPI strip ---------- */
.kpis{display:grid;grid-template-columns:repeat(6,1fr);gap:12px}
@media(max-width:1000px){.kpis{grid-template-columns:repeat(3,1fr)}}
@media(max-width:560px){.kpis{grid-template-columns:repeat(2,1fr)}}
.kpi{background:var(--card);border:1px solid var(--line);
  border-radius:var(--r);padding:14px 16px 12px}
.kpi .num{font-family:var(--body);font-size:28px;font-weight:600;
  letter-spacing:-.01em;line-height:1.05;
  display:block;position:relative;padding-bottom:8px}
.kpi .num::after{content:"";position:absolute;left:1px;bottom:2px;
  width:30px;height:3px;border-radius:2px;
  background:var(--signal)}   /* the auditable-figure bar */
.kpi .kicker{margin-bottom:6px;display:block}
.kpi small{display:block;margin-top:6px;color:var(--g600);font-size:12px}

/* ---------- dashboard grid ---------- */
.dash{display:grid;gap:16px;margin-top:16px;
  grid-template-columns:repeat(12,1fr)}
.span-12{grid-column:span 12}.span-7{grid-column:span 7}
.span-6{grid-column:span 6}.span-5{grid-column:span 5}
@media(max-width:1000px){.span-7,.span-6,.span-5{grid-column:span 12}}
.card-head{display:flex;align-items:baseline;gap:10px;
  padding:16px 22px 0}
.card-head h2{font-size:16px;font-weight:600}
.card-head .note{margin-left:auto}
.chart-wrap{padding:12px 18px 18px;height:280px;position:relative}

/* ---------- heatmap ---------- */
.heat{border-collapse:separate;border-spacing:3px;
  font-variant-numeric:tabular-nums}
.heat th{font-size:11px;font-weight:600;color:var(--g600);
  text-transform:uppercase;letter-spacing:.06em;padding:2px 6px;
  text-align:center}
.heat td{width:44px;height:30px;border-radius:6px;text-align:center;
  font-family:var(--display);font-weight:600;font-size:12px}
.heat td:first-child,.heat th:first-child{text-align:left;
  font-family:var(--body);color:var(--g800);padding-right:22px;
  white-space:nowrap}
td.expert{background:var(--g950);color:#fff}
td.engaged{background:var(--signal);color:#fff}
td.handled{background:var(--wash);color:var(--signal-ink)}
td.missed{background:#F0F2F5;color:var(--g400)}
.heat-legend{display:flex;gap:14px;padding:0 22px 16px;font-size:12px;
  color:var(--g600);align-items:center;flex-wrap:wrap}
.heat-legend i{display:inline-block;width:12px;height:12px;
  border-radius:4px;margin-right:5px;vertical-align:-1px}

/* ---------- GROUPS RAIL + drawer (the signature) ---------- */
.rail{display:grid;grid-template-columns:repeat(auto-fill,minmax(56px,1fr));
  gap:8px;padding:16px 22px}
.rail-cell{border:1px solid var(--line);border-radius:10px;background:#fff;
  padding:8px 4px 6px;text-align:center;cursor:pointer;
  transition:border-color .12s;font-family:var(--display)}
.rail-cell:hover{border-color:var(--signal)}
.rail-cell.active{border-color:var(--signal);box-shadow:0 0 0 3px var(--wash)}
.rail-cell .g{font-size:18px;font-weight:700;line-height:1}
.rail-cell .dots{display:flex;gap:3px;justify-content:center;margin-top:5px}
.rail-cell .dot{width:7px;height:7px;border-radius:50%;background:#E7EAEF}
.dot.ok{background:var(--ok)} .dot.hold{background:var(--hold)}
.dot.flag{background:var(--flag)} .dot.rep{background:var(--g950)}
.drawer{border-top:1px solid var(--line);padding:20px 22px;display:none}
.drawer.open{display:block;animation:draw .18s ease-out}
@keyframes draw{from{opacity:0;transform:translateY(-4px)}to{opacity:1}}
.drawer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:20px}
@media(max-width:1000px){.drawer-grid{grid-template-columns:1fr}}
.drawer h3{font-size:20px;font-weight:600;line-height:1.25}
.radar-box{height:230px;position:relative}
.stat-row{display:flex;justify-content:space-between;gap:8px;
  padding:7px 0;border-bottom:1px solid var(--line);font-size:13.5px}
.stat-row b{font-family:var(--body);font-weight:600;
  font-variant-numeric:tabular-nums}
.moves li{margin-bottom:6px;font-size:13.5px}
.drawer-links{margin-top:10px;font-size:12.5px}

/* ---------- lexicon + habits ---------- */
.lexicon{display:flex;flex-wrap:wrap;gap:8px;align-items:center;
  padding:16px 22px 20px}
.lexicon span{background:#EEF1F5;color:var(--g800);border-radius:8px;
  padding:3px 10px;font-family:var(--display);font-weight:500}
.lexicon span.loaded{background:var(--g950);color:#fff}
.habits{padding:6px 22px 20px}
.habit{background:#fff;border:1px solid var(--line);border-left:3px solid var(--signal);
  border-radius:10px;padding:12px 14px;font-size:13.5px;height:100%}
.habit .cite{color:var(--g600);font-size:11.5px;font-weight:600;
  text-transform:uppercase;letter-spacing:.06em}

/* transcript markup (provenance drill) */
.crossout{text-decoration:line-through;color:var(--g400)}
.circled-word{border:1.5px solid var(--signal);border-radius:999px;
  padding:0 5px;color:var(--signal-ink)}
.margin-note{font-size:.82em;color:var(--signal);font-style:italic;
  vertical-align:super}
.illegible{color:var(--g400);font-style:italic;font-size:.85em}
.sketch{color:var(--g800);font-size:.85em;background:#EEF1F5;
  border-radius:5px;padding:0 .35em}
.t-label{font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;
  color:var(--g600);font-weight:700}
.ruled{background:var(--card);border:1px solid var(--line);
  border-radius:var(--r);padding:16px 18px}
.quote{font-size:14px}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12.5px}

/* ---------- BOARD (projector) ---------- */
body.board{background:var(--g950);color:#F2F5FA;min-height:100vh}
body.board .tf-main{max-width:1500px;display:flex;align-items:center;
  justify-content:center;min-height:92vh;text-align:center}
body.board h1{font-size:clamp(2.4rem,5.2vw,4.6rem);font-weight:700;
  letter-spacing:-.025em;line-height:1.1;color:#fff}
body.board .eyebrow{color:#8FA6FF;font-size:14px;margin-bottom:18px;display:block}
body.board p{color:#B9C4D6}
body.board em{color:#8FA6FF;font-style:normal}
.timer{font-family:var(--display);font-variant-numeric:tabular-nums;
  font-size:clamp(4rem,9vw,7.5rem);font-weight:700;color:#8FA6FF;
  line-height:1;letter-spacing:0}
.timer.done{color:#FF7A7A}
.tile-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:12px}
.tile{background:#1A2030;border:1px solid #2A3245;border-radius:12px;
  padding:14px 6px 10px;font-family:var(--display);font-weight:700;
  font-size:26px;color:#5D6A82;transition:background .3s}
.tile small{display:block;font-size:10.5px;font-weight:700;
  letter-spacing:.14em;margin-top:4px;color:#5D6A82}
.tile.done{background:var(--signal);border-color:var(--signal);color:#fff}
.tile.done small{color:#D8E2FF}
.tile.failed{background:var(--flag);border-color:var(--flag);color:#fff}
.tile.failed small{color:#FFD9D9}

/* ---------- SCAN (phone) ---------- */
body.scan .tf-main{max-width:460px;padding-top:20px}
body.scan h1{font-size:26px;font-weight:600;line-height:1.2}
.big-input{width:100%;font-family:var(--display);font-size:56px;
  font-weight:700;text-align:center;border:1.5px solid var(--line);
  border-radius:var(--r);padding:12px;background:#fff;
  font-variant-numeric:tabular-nums}
.big-input:focus{border-color:var(--signal);outline:none;
  box-shadow:0 0 0 4px var(--wash)}
.upload-zone{display:block;border:1.5px dashed var(--g400);
  border-radius:var(--r);background:#fff;padding:22px 14px;
  text-align:center;cursor:pointer;margin-bottom:12px;
  font-weight:600;color:var(--g800)}
.upload-zone:active{border-color:var(--signal);background:var(--wash)}
.upload-zone img{max-width:100%;max-height:180px;border-radius:8px}
.scan-step{background:var(--card);border:1px solid var(--line);
  border-radius:var(--r);box-shadow:var(--shadow);padding:22px 20px}
#status-note{background:var(--hold-wash);color:#9A6A1B;border-radius:8px;
  padding:8px 12px;font-weight:600}
#err{color:var(--flag);font-weight:600}

/* ---------- console ---------- */
.tf-table{width:100%;border-collapse:collapse;font-size:13.5px}
.tf-table th{font-size:11px;text-transform:uppercase;letter-spacing:.08em;
  color:var(--g600);text-align:left;padding:8px 12px;
  border-bottom:1px solid var(--line)}
.tf-table td{padding:8px 12px;border-bottom:1px solid var(--line);
  vertical-align:middle}
.tf-table tr:hover td{background:#F5F7FA}

/* bootstrap card-part overrides + odds and ends */
.card-header{background:transparent;border-bottom:1px solid var(--line);
  font-family:var(--body);font-size:11px;font-weight:600;
  letter-spacing:.12em;text-transform:uppercase;color:var(--g600);
  padding:12px 18px}
.card-body{padding:16px 18px}
.thumb{max-width:100%;border-radius:10px;border:1px solid var(--line)}
.form-select{border-color:var(--line);border-radius:10px;font-weight:500}
.form-select:focus{border-color:var(--signal);box-shadow:0 0 0 4px var(--wash)}
body.board .btn-light{background:#fff;color:var(--g950);border-radius:12px;
  font-family:var(--display);font-weight:700;padding:14px 28px;font-size:18px}
body.board .tf-topbar{display:none}
body.scan .tf-topbar-sub,body.scan .tf-topbar-right{display:none}

/* gaps panel — root causes, not symptoms */
.gap-row{display:flex;align-items:baseline;gap:12px;padding:9px 0;
  border-bottom:1px solid var(--line);font-size:13.5px}
.gap-row:last-child{border-bottom:0}
.gap-count{font-family:var(--body);font-weight:600;min-width:86px;
  font-variant-numeric:tabular-nums;color:var(--g950)}
.gap-row .sev{margin-left:auto}

/* ---------- teacher shell: global nav, Canvas-style ---------- */
.tf-app{display:flex;min-height:100vh}
.tf-side{width:216px;flex:0 0 216px;background:#fff;
  border-right:1px solid var(--line);padding:20px 14px;
  position:sticky;top:0;height:100vh;display:flex;flex-direction:column}
.tf-sidenav{display:flex;flex-direction:column;gap:2px}
.tf-sidenav a{padding:8px 12px;border-radius:9px;color:var(--g800);
  font-weight:500;font-size:14px}
.tf-sidenav a:hover{background:#F2F4F8;text-decoration:none}
.tf-sidenav a.active{background:var(--wash);color:var(--signal-ink);
  font-weight:600}
.tf-side-sec{font-size:10.5px;font-weight:700;letter-spacing:.12em;
  text-transform:uppercase;color:var(--g400);margin:18px 12px 6px}
.tf-side-foot{margin-top:auto;font-size:11px;color:var(--g400);
  padding:0 12px}
.tf-body{flex:1;min-width:0}
.tf-crumbs{position:sticky;top:0;z-index:40;display:flex;align-items:center;
  gap:10px;background:rgba(250,251,252,.86);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);padding:12px 28px;
  font-size:13px;color:var(--g600);min-height:49px}
.tf-content{max-width:1140px;padding:26px 28px 80px}
@media(max-width:900px){
  .tf-app{display:block}
  .tf-side{width:auto;height:auto;position:static;flex-direction:row;
    align-items:center;gap:4px;padding:10px 14px;overflow-x:auto;
    border-right:0;border-bottom:1px solid var(--line)}
  .tf-side .tf-wordmark{margin:0 10px 0 0}
  .tf-sidenav{flex-direction:row}
  .tf-side-sec,.tf-side-foot{display:none}
}
/* home course cards */
.klass-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));
  gap:14px}
.klass-card{display:block;background:#fff;border:1px solid var(--line);
  border-radius:var(--r);padding:18px;color:inherit;box-shadow:var(--shadow);
  transition:border-color .12s}
.klass-card:hover{border-color:var(--signal);text-decoration:none;color:inherit}
.klass-card .bar{height:4px;border-radius:2px;background:var(--signal);
  width:34px;margin-bottom:12px}
.klass-card h2{font-size:17px}
.klass-card .meta{color:var(--g600);font-size:12.5px;margin-top:4px}
.klass-live{border:1px solid var(--line);border-left:3px solid var(--signal)}