/* Instructor classes (/teach) and the learner join page (/join). Uses the site's light/dark tokens from site.css. */
.tc-page{max-width:1180px;margin:0 auto;padding:44px 24px 96px;min-height:calc(100vh - 250px)}
.tc-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:28px}
.tc-kicker{font-size:12px;font-weight:600;letter-spacing:.06em;color:var(--muted);margin:0 0 8px}
.tc-head h1,.tc-joincard h1{font-size:34px;line-height:1.15;letter-spacing:-1.1px;font-weight:650;margin:0}
.tc-sub{margin:10px 0 0;font-size:15px;line-height:1.55;color:var(--muted);max-width:640px}
.tc-notice{font-size:14px;line-height:1.6;border:1px solid var(--line-strong);border-radius:10px;padding:14px 16px;background:var(--surface);margin:0 0 16px}
.tc-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 18px;border-radius:10px;border:1px solid var(--line-strong);background:var(--surface);color:var(--ink);font:600 14px var(--font);cursor:pointer;text-decoration:none;white-space:nowrap}
.tc-btn svg{width:17px;height:17px;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round}
.tc-btn:hover{background:var(--hover)}
.tc-btn.primary{background:var(--btn-bg);color:var(--btn-fg);border-color:transparent}
.tc-btn.primary:hover{filter:brightness(1.08)}
.tc-btn.ghost{background:transparent}
.tc-btn.big{min-height:52px;padding:0 24px;font-size:15px}
.tc-btn.sm{min-height:36px;padding:0 12px;font-size:13px}
.tc-btn:disabled{opacity:.55;cursor:default}
.tc-btn:focus-visible,.tc-card:focus-visible,.tc-joinform input:focus-visible{outline:2px solid var(--focus);outline-offset:2px}

/* signed out */
.tc-signedout{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.9fr);gap:40px;align-items:center;border:1px solid var(--line-strong);border-radius:20px;background:var(--surface);padding:40px}
.tc-so-copy h2{font-size:26px;letter-spacing:-.6px;margin:0 0 18px}
.tc-steps{list-style:none;margin:0 0 26px;padding:0;display:grid;gap:14px;counter-reset:s}
.tc-steps li{display:grid;grid-template-columns:34px 1fr;gap:2px 12px;counter-increment:s}
.tc-steps li::before{content:counter(s);grid-row:span 2;display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--chip);font-weight:700;font-size:14px}
.tc-steps b{font-size:15px}.tc-steps span{font-size:14px;color:var(--muted)}
.tc-fine{font-size:13px;color:var(--muted);margin:14px 0 0}.tc-fine a{color:inherit}
.tc-so-shot{margin:0}
.tc-mock{border:1px solid var(--line);border-radius:14px;padding:18px;display:grid;gap:12px;background:var(--bg)}
.tc-mock i{display:grid;grid-template-columns:34px 1fr 90px;gap:12px;align-items:center;height:34px;border-radius:8px;background:linear-gradient(90deg,var(--chip) 0 34px,transparent 34px 46px,var(--line) 46px 60%,transparent 60% 66%,#f5c518 66% 84%,var(--line) 84%)}

/* signed in */
.tc-layout{display:grid;grid-template-columns:300px minmax(0,1fr);gap:28px;align-items:start}
.tc-list{display:grid;gap:12px;position:sticky;top:88px}
.tc-card{display:grid;gap:6px;width:100%;text-align:left;padding:16px;border:1px solid var(--line-strong);border-radius:14px;background:var(--surface);color:var(--ink);font:inherit;cursor:pointer}
.tc-card:hover{background:var(--hover)}
.tc-card[aria-current="true"]{border-color:var(--ink);box-shadow:0 0 0 1px var(--ink)}
.tc-card b{font-size:15px;letter-spacing:-.2px}
.tc-card span{display:flex;gap:8px;align-items:center;font-size:12.5px;color:var(--muted)}
.tc-chip{font-style:normal;display:inline-flex;align-items:center;padding:3px 8px;border-radius:999px;background:var(--chip);font-size:11.5px;font-weight:600;color:var(--ink)}
.tc-empty{border:1px dashed var(--line-strong);border-radius:14px;padding:22px;text-align:center;color:var(--muted);font-size:14px}
.tc-create{display:grid;gap:12px;padding:18px;border:1px solid var(--line-strong);border-radius:14px;background:var(--surface)}
.tc-create h2{font-size:16px;margin:0}
.tc-create label{display:grid;gap:6px;font-size:13px;font-weight:600}
.tc-create input,.tc-create select{height:44px;padding:0 12px;border-radius:9px;border:1px solid var(--line-strong);background:var(--bg);color:var(--ink);font:15px var(--font)}
.tc-row{display:flex;gap:8px;flex-wrap:wrap}
.tc-err{color:var(--danger);font-size:13px;margin:0;min-height:0}
.tc-joined h3{font-size:13px;color:var(--muted);margin:8px 0 6px;font-weight:600}
.tc-joined ul{list-style:none;margin:0;padding:0;display:grid;gap:6px;font-size:13.5px}
.tc-joined a{color:var(--ink)}

.tc-detail{min-width:0}
.tc-dhead{display:flex;justify-content:space-between;gap:20px;align-items:flex-start;flex-wrap:wrap;padding:24px;border:1px solid var(--line-strong);border-radius:18px;background:var(--surface)}
.tc-dhead h2{font-size:24px;letter-spacing:-.6px;margin:6px 0 4px}
.tc-dhead p{margin:0;color:var(--muted);font-size:13.5px}
.tc-code{display:grid;gap:8px;justify-items:end;text-align:right}
.tc-code small{font-size:11.5px;font-weight:600;letter-spacing:.06em;color:var(--muted)}
.tc-code strong{font:700 30px/1 "Geist Mono",ui-monospace,monospace;letter-spacing:.14em}
.tc-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:16px 0}
.tc-stat{border:1px solid var(--line);border-radius:14px;padding:14px 16px;background:var(--surface)}
.tc-stat b{display:block;font-size:24px;letter-spacing:-.6px}
.tc-stat span{font-size:12.5px;color:var(--muted)}
.tc-tablewrap{border:1px solid var(--line-strong);border-radius:18px;background:var(--surface);overflow:hidden}
.tc-tablescroll{overflow-x:auto}
.tc-tabletop{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:16px 18px;border-bottom:1px solid var(--line)}
.tc-tabletop h3{margin:0;font-size:16px}
.tc-table{width:100%;border-collapse:collapse;font-size:13.5px}
.tc-table th{text-align:left;font-size:11.5px;letter-spacing:.04em;color:var(--muted);font-weight:600;padding:10px 12px;border-bottom:1px solid var(--line)}
.tc-table td{white-space:nowrap;padding:14px 12px;border-bottom:1px solid var(--line);vertical-align:middle}
.tc-table tr:last-child td{border-bottom:0}
.tc-who{white-space:normal!important}.tc-who b{display:block;font-weight:600}.tc-who span{font-size:12px;color:var(--muted)}
.tc-bar{display:flex;align-items:center;gap:10px;min-width:120px}
.tc-bar i{position:relative;flex:1;height:8px;border-radius:4px;background:var(--line);overflow:hidden}
.tc-bar i::after{content:"";position:absolute;inset:0 auto 0 0;width:var(--p);background:#f5c518;border-radius:4px}
.tc-bar em{font-style:normal;font-weight:600;min-width:38px;text-align:right}
.tc-units{display:flex;gap:3px}
.tc-units i{width:12px;height:12px;border-radius:4px;background:var(--line)}
.tc-units i.part{background:linear-gradient(135deg,#f5c518 50%,var(--line) 50%)}
.tc-units i.done{background:#2e9e5b}
.tc-ok{color:#2e9e5b;font-weight:600}
.tc-dim{color:var(--muted)}
.tc-c-x{width:44px;text-align:right}.tc-x{min-width:32px;font-size:16px;border:0;background:transparent;color:var(--muted);cursor:pointer;padding:6px;border-radius:6px;font:inherit}
.tc-x:hover{background:var(--hover);color:var(--danger)}
.tc-nolearners{padding:34px 20px;text-align:center;color:var(--muted)}
.tc-nolearners b{display:block;color:var(--ink);font-size:16px;margin-bottom:6px}
.tc-foot{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:14px;font-size:12.5px;color:var(--muted)}

/* join page */
.tc-joinpage{display:grid;place-items:start center;padding-top:64px}
.tc-joincard{width:min(480px,100%);text-align:center;border:1px solid var(--line-strong);border-radius:22px;background:var(--surface);padding:40px 32px}
.tc-joinicon{display:inline-grid;place-items:center;width:56px;height:56px;border-radius:16px;background:var(--chip);margin-bottom:16px}
.tc-joinicon svg{width:28px;height:28px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.tc-joincard .tc-sub{margin:10px auto 22px}
.tc-joinform{display:grid;gap:12px}
.tc-share{margin:14px 0 0;color:var(--muted);font-size:13px;line-height:1.5;text-align:left}
.tc-share a{color:inherit}
.tc-joinform input{height:58px;border-radius:12px;border:1px solid var(--line-strong);background:var(--bg);color:var(--ink);text-align:center;font:700 26px "Geist Mono",ui-monospace,monospace;letter-spacing:.3em;text-transform:uppercase}
.tc-joined-ok{display:grid;gap:12px;justify-items:center;margin-top:8px}
.tc-joined-ok h2{margin:0;font-size:22px}
.tc-joined-ok p{margin:0;color:var(--muted);font-size:14px;line-height:1.55}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

@media (max-width:900px){
  .tc-layout,.tc-signedout{grid-template-columns:1fr}
  .tc-list{position:static}
  .tc-so-shot{display:none}
  .tc-stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .tc-table thead{display:none}
  .tc-table tr{display:grid;grid-template-columns:1fr auto;gap:6px 12px;padding:14px 16px;border-bottom:1px solid var(--line)}
  .tc-table td{padding:0;border:0}
  .tc-table td.tc-c-bar{grid-column:1/-1}
  .tc-table td.tc-c-units,.tc-table td.tc-c-pass,.tc-table td.tc-c-last{display:none}
}
@media (max-width:560px){
  .tc-page{padding:28px 16px 96px}
  .tc-head{flex-direction:column;align-items:stretch}
  .tc-head h1,.tc-joincard h1{font-size:28px}
  .tc-signedout{padding:24px}
  .tc-code{justify-items:start;text-align:left}
}
/* not yet approved */
.tc-lk{font-size:15px;line-height:1.55;color:var(--muted);margin:0 0 22px;max-width:46ch}.tc-lk b{color:var(--ink);font-weight:650}
#tcLocked .tc-joined{margin-top:26px}

/* tabs: Classes / School contracts (admins) */
.tc-tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin:-6px 0 24px}
.tc-tabs button{position:relative;border:0;background:none;color:var(--muted);font:600 14px var(--font);padding:12px 4px;margin-right:20px;cursor:pointer}
.tc-tabs button:hover{color:var(--ink)}
.tc-tabs button[aria-selected="true"]{color:var(--ink)}
.tc-tabs button[aria-selected="true"]::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;border-radius:2px;background:var(--ink)}

/* the instructor's own contract, above their classes */
.tc-contract{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px 28px;padding:16px 20px;margin:0 0 24px;border:1px solid var(--line-strong);border-radius:16px;background:var(--surface)}
.tc-contract .tc-cid{display:grid;gap:2px}.tc-contract .tc-cid b{font-size:15px;letter-spacing:-.2px}.tc-contract .tc-cid span{font-size:13px;color:var(--muted)}
.tc-meters{display:flex;flex-wrap:wrap;gap:10px 22px}
.tc-meter{display:grid;gap:6px;min-width:150px}
.tc-meter span{display:flex;justify-content:space-between;gap:12px;font-size:12.5px;color:var(--muted)}.tc-meter span b{color:var(--ink);font-weight:600}
.tc-meter i{display:block;height:6px;border-radius:3px;background:var(--line);overflow:hidden}
.tc-meter i::after{content:"";display:block;height:100%;width:var(--p);background:var(--ink);border-radius:3px}
.tc-meter.full i::after{background:var(--danger)}

/* school contracts (admins) */
.tc-chead{display:flex;justify-content:space-between;align-items:center;gap:24px;margin-bottom:20px}
.tc-chead h2{margin:0;font-size:22px;letter-spacing:-.5px}
.tc-chead p{margin:0;color:var(--muted);font-size:14px;line-height:1.55;max-width:620px}
.tc-kpis{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-bottom:16px}
.tc-kpi{padding:16px 18px;border:1px solid var(--line);border-radius:14px;background:var(--surface)}
.tc-kpi b{display:block;font-size:26px;letter-spacing:-.8px;font-weight:650;font-variant-numeric:tabular-nums}
.tc-kpi span{font-size:12.5px;color:var(--muted)}
.tc-inset{margin:16px;border:0;padding:0;background:none}
.tc-ctable td{vertical-align:top}
.tc-ctable .tc-who b{font-size:14px}
.tc-seats{display:flex;flex-wrap:wrap;gap:6px;max-width:420px;white-space:normal}
.tc-seat{display:inline-flex;align-items:center;gap:6px;padding:4px 9px;border-radius:8px;border:1px solid var(--line);background:var(--bg);font-size:12.5px;font-variant-numeric:tabular-nums}
.tc-seat b{font-weight:600}.tc-seat em{font-style:normal;color:var(--muted)}
.tc-seat.full{border-color:color-mix(in srgb,var(--danger) 45%,transparent)}.tc-seat.full em{color:var(--danger)}
.tc-pill{display:inline-flex;align-items:center;gap:6px;padding:3px 10px;border-radius:999px;font-size:12px;font-weight:600;background:var(--chip);color:var(--muted);white-space:nowrap}
.tc-pill::before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor}
.tc-pill.ok{color:#1f8a4c;background:color-mix(in srgb,#2e9e5b 14%,transparent)}
.tc-pill.warn{color:#a8650b;background:color-mix(in srgb,#f0a020 18%,transparent)}
:root[data-theme="dark"] .tc-pill.ok{color:#5fd08c}:root[data-theme="dark"] .tc-pill.warn{color:#f3b54a}
.tc-sub2{display:block;margin-top:4px;font-size:12px;color:var(--muted);font-weight:400}
.tc-acts{display:flex;justify-content:flex-end;gap:4px}
.tc-link{border:0;background:none;color:var(--ink);font:600 13px var(--font);padding:6px 10px;border-radius:8px;cursor:pointer}
.tc-link:hover{background:var(--hover)}.tc-link.danger{color:var(--danger)}

/* contract drawer */
.tc-drawer{position:fixed;inset:0;z-index:200}
.tc-scrim{position:absolute;inset:0;background:rgba(10,12,16,.42);animation:tcFade .18s ease}
.tc-sheet{position:absolute;top:0;right:0;bottom:0;width:min(560px,100%);display:grid;grid-template-rows:auto 1fr auto;background:var(--surface);color:var(--ink);box-shadow:-24px 0 60px -20px rgba(0,0,0,.35);animation:tcSlide .22s cubic-bezier(.2,.8,.2,1)}
@keyframes tcFade{from{opacity:0}}@keyframes tcSlide{from{transform:translateX(24px);opacity:.4}}
@media (prefers-reduced-motion:reduce){.tc-scrim,.tc-sheet{animation:none}}
.tc-shead{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;padding:24px 28px 18px;border-bottom:1px solid var(--line)}
.tc-shead h2{margin:0;font-size:21px;letter-spacing:-.4px}.tc-shead .tc-kicker{margin-bottom:6px}
.tc-icon{display:grid;place-items:center;width:36px;height:36px;border-radius:10px;border:1px solid var(--line);background:none;color:var(--ink);cursor:pointer}
.tc-icon:hover{background:var(--hover)}.tc-icon svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round}
.tc-sbody{overflow:auto;padding:8px 28px 24px;display:grid;gap:8px;align-content:start}
.tc-fs{border:0;margin:0;padding:18px 0 10px;display:grid;gap:12px;border-bottom:1px solid var(--line)}
.tc-fs:last-child{border-bottom:0}
.tc-fs legend{display:flex;align-items:center;gap:10px;padding:0;margin-bottom:4px;font-size:14px;font-weight:650}
.tc-fs legend span{display:grid;place-items:center;width:22px;height:22px;border-radius:50%;background:var(--ink);color:var(--surface);font-size:12px}
.tc-field{display:grid;gap:6px;font-size:12.5px;font-weight:600;color:var(--muted)}
.tc-field input,.tc-field select{height:44px;border-radius:10px;border:1px solid var(--line-strong);background:var(--bg);color:var(--ink);padding:0 12px;font:15px var(--font)}
.tc-field input:focus-visible,.tc-field select:focus-visible,.tc-tr input:focus-visible{outline:2px solid var(--focus);outline-offset:1px}
.tc-field input[readonly]{color:var(--muted)}
.tc-hint{margin:-2px 0 2px;font-size:13px;line-height:1.5;color:var(--muted)}
.tc-trades{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.tc-tr,.tc-seg button,.tc-tabs button,.tc-link,.tc-btn{-webkit-tap-highlight-color:transparent}
.tc-tr{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:10px;min-height:52px;padding:8px 10px 8px 12px;border:1px solid var(--line-strong);border-radius:12px;background:var(--bg);cursor:pointer;transition:border-color .15s,background .15s}
.tc-tr:hover{border-color:var(--muted)}
.tc-tr.on{border-color:var(--ink);background:var(--surface);box-shadow:0 0 0 1px var(--ink)}
.tc-tr input[type=checkbox]{appearance:none;width:18px;height:18px;margin:0;border-radius:5px;border:1.5px solid var(--line-strong);display:grid;place-items:center;cursor:pointer}
.tc-tr input[type=checkbox]:checked{background:var(--ink);border-color:var(--ink)}
.tc-tr input[type=checkbox]:checked::after{content:"";width:9px;height:5px;border:2px solid var(--surface);border-top:0;border-right:0;transform:rotate(-45deg) translate(1px,-1px)}
.tc-tr b{font-size:14px;font-weight:600}
.tc-tr .tc-seatin{width:92px;height:34px;border-radius:8px;border:1px solid var(--line-strong);background:var(--surface);color:var(--ink);padding:0 10px;font:600 13px var(--font);text-align:right;font-variant-numeric:tabular-nums}
.tc-tr:not(.on) .tc-seatin{visibility:hidden}
.tc-seg{display:grid;grid-template-columns:repeat(4,1fr);gap:4px;padding:4px;border-radius:12px;background:var(--chip)}
.tc-seg button{height:38px;border:0;border-radius:9px;background:none;color:var(--muted);font:600 13px var(--font);cursor:pointer}
.tc-seg button[aria-checked="true"]{background:var(--surface);color:var(--ink);box-shadow:0 1px 2px rgba(0,0,0,.12)}
.tc-date{display:grid;grid-template-columns:1.4fr .8fr 1fr;gap:10px}
.tc-ends{margin:2px 0 0;font-size:13.5px;color:var(--muted)}.tc-ends b{color:var(--ink)}
.tc-sfoot{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:16px 28px;border-top:1px solid var(--line);background:var(--surface)}
.tc-sfoot .tc-err{flex:1}
.tc-toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%);z-index:300;padding:12px 18px;border-radius:12px;background:var(--btn-bg);color:var(--btn-fg);font-size:14px;font-weight:600;box-shadow:var(--shadow-lg)}
@media (max-width:900px){.tc-kpis{grid-template-columns:repeat(2,minmax(0,1fr))}.tc-chead{flex-direction:column;align-items:stretch}}
@media (max-width:560px){.tc-trades{grid-template-columns:1fr}.tc-shead,.tc-sbody,.tc-sfoot{padding-left:18px;padding-right:18px}.tc-seg{grid-template-columns:1fr 1fr}.tc-sfoot{flex-direction:column;align-items:stretch}}