:root{
  color-scheme:light;
  --ink:#15202b;
  --muted:#55616f;
  --paper:#f6f8f7;
  --white:#fff;
  --line:#d8dedb;
  --forest:#0f5b49;
  --forest-dark:#0a4638;
  --gold:#b6811d;
  --gold-soft:#fff5d8;
  --coral:#c8513c;
  --teal-soft:#e5f4ef;
  --charcoal:#1d2926;
  --focus:#087e8b;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,Segoe UI,Arial,sans-serif;line-height:1.55;letter-spacing:0}
button,input,select{font:inherit;letter-spacing:0}
a{color:var(--forest);text-underline-offset:3px}
[hidden]{display:none!important}
.teacher-nav{min-height:68px;padding:10px clamp(16px,4vw,56px);display:flex;align-items:center;justify-content:space-between;gap:24px;border-bottom:1px solid var(--line);background:var(--white)}
.teacher-brand{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none}
.teacher-brand span{width:38px;height:38px;display:grid;place-items:center;background:var(--forest);color:#fff;border-radius:8px;font-weight:800}
.teacher-brand strong{font-size:1.05rem}
.teacher-nav nav{display:flex;gap:22px;align-items:center;flex-wrap:wrap}
.teacher-nav nav a{color:var(--muted);font-size:.9rem;text-decoration:none;font-weight:650}
.teacher-nav nav a:hover{color:var(--forest)}
.teacher-intro{max-width:1240px;margin:0 auto;padding:42px clamp(18px,4vw,54px) 30px;display:grid;grid-template-columns:minmax(0,1.45fr) minmax(300px,.7fr);gap:42px;align-items:end}
.teacher-intro h1{font-size:clamp(2rem,4vw,3.45rem);line-height:1.08;margin:8px 0 16px;max-width:900px}
.teacher-intro>div>p{max-width:760px;font-size:1.08rem;color:var(--muted);margin:0}
.teacher-kicker{display:block;color:var(--forest);font-size:.74rem;line-height:1.3;text-transform:uppercase;font-weight:800}
.teacher-proof{border-left:4px solid var(--gold);padding:4px 0 4px 20px}
.teacher-proof>span{font-size:.76rem;color:var(--muted);font-weight:700}
.teacher-proof dl{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:12px 0}
.teacher-proof dl div{border-top:1px solid var(--line);padding-top:8px}
.teacher-proof dt{font-size:.72rem;color:var(--muted)}
.teacher-proof dd{margin:0;color:var(--gold);font-size:1.35rem;font-weight:850}
.teacher-proof p{font-size:.82rem;color:var(--muted);margin:0 0 8px}
.teacher-proof a{font-size:.82rem;font-weight:750}
.teacher-tool{max-width:1240px;margin:0 auto 46px;background:var(--white);border:1px solid var(--line);border-radius:8px;overflow:hidden;box-shadow:0 16px 42px rgba(26,50,42,.08)}
.teacher-tool__head{min-height:106px;display:grid;grid-template-columns:68px minmax(0,1fr) auto;gap:18px;align-items:center;padding:18px 22px;background:var(--charcoal);color:#fff}
.teacher-tool__head img{width:68px;height:68px;object-fit:cover;border-radius:8px;border:2px solid #5bb99d}
.teacher-tool__head h2{font-size:1.28rem;line-height:1.2;margin:3px 0;color:#fff}
.teacher-tool__head p{margin:0;color:#c9d4d0;font-size:.88rem}
.teacher-tool__head .teacher-kicker{color:#7ee0c0}
.teacher-tool__head ol{list-style:none;margin:0;padding:0;display:flex;gap:8px}
.teacher-tool__head li{min-width:86px;color:#a7b5b0;font-size:.72rem;text-align:center}
.teacher-tool__head li span{width:27px;height:27px;margin:0 auto 4px;display:grid;place-items:center;border:1px solid #5b6965;border-radius:50%;font-weight:800}
.teacher-tool__head li.is-active,.teacher-tool__head li.is-done{color:#fff}
.teacher-tool__head li.is-active span{background:#f0bc4d;border-color:#f0bc4d;color:#26302d}
.teacher-tool__head li.is-done span{background:#39a982;border-color:#39a982;color:#fff}
.teacher-mode{display:grid;grid-template-columns:1fr 1fr;background:#edf1ef;border-bottom:1px solid var(--line);padding:8px;gap:8px}
.teacher-mode label{cursor:pointer}
.teacher-mode input{position:absolute;width:1px;height:1px;margin:0;overflow:hidden;clip-path:inset(50%);white-space:nowrap;opacity:0;pointer-events:none}
.teacher-mode span{min-height:44px;display:grid;place-items:center;border:1px solid transparent;border-radius:6px;color:var(--muted);font-weight:750}
.teacher-mode input:checked+span{background:var(--white);border-color:#aab8b2;color:var(--forest);box-shadow:0 2px 8px rgba(21,32,43,.08)}
.teacher-mode input:focus-visible+span{outline:3px solid rgba(8,126,139,.3);outline-offset:2px}
.teacher-workspace{display:grid;grid-template-columns:minmax(0,1.02fr) minmax(380px,.98fr);min-height:530px}
.teacher-form{padding:24px;border-right:1px solid var(--line)}
.teacher-fields{display:grid;gap:17px}
.teacher-fields--prepare{grid-template-columns:1fr 1fr}
.teacher-fields--compare{grid-template-columns:1fr 1fr}
.teacher-fields>label,.teacher-fields fieldset{min-width:0;margin:0}
.teacher-fields>label{display:grid;gap:6px;color:var(--ink);font-size:.84rem;font-weight:750}
.teacher-fields>label span{color:var(--muted);font-size:.72rem;font-weight:550}
.teacher-fields input,.teacher-fields select,.teacher-contact input{width:100%;min-height:46px;border:1px solid #bac5c0;border-radius:6px;background:#fff;color:var(--ink);padding:10px 12px}
.teacher-fields input:focus,.teacher-fields select:focus,.teacher-contact input:focus{outline:3px solid rgba(8,126,139,.18);border-color:var(--focus)}
.teacher-fields fieldset{border:0;padding:0}
.teacher-fields legend{padding:0;margin:0 0 6px;font-size:.84rem;font-weight:750}
.teacher-segments{display:grid;grid-template-columns:repeat(3,1fr);gap:5px}
.teacher-segments label{cursor:pointer;min-width:0}
.teacher-segments input{position:absolute;width:1px;height:1px;margin:0;overflow:hidden;clip-path:inset(50%);white-space:nowrap;opacity:0;pointer-events:none}
.teacher-segments span{min-height:46px;display:grid;place-items:center;text-align:center;padding:6px;border:1px solid #bac5c0;border-radius:6px;background:#fff;color:var(--muted);font-size:.76rem;font-weight:700}
.teacher-segments input:checked+span{border-color:var(--forest);background:var(--teal-soft);color:var(--forest-dark)}
.teacher-segments input:focus-visible+span{outline:3px solid rgba(8,126,139,.25);outline-offset:1px}
.teacher-inline-note{margin:0 0 16px;padding:10px 12px;border-left:3px solid var(--gold);background:var(--gold-soft);font-size:.82rem;color:#5c471f}
.teacher-primary,.teacher-secondary{min-height:46px;border-radius:6px;padding:11px 18px;font-weight:800;cursor:pointer}
.teacher-primary{width:100%;border:1px solid var(--forest);background:var(--forest);color:#fff;margin-top:22px}
.teacher-primary:hover{background:var(--forest-dark)}
.teacher-primary:disabled{opacity:.65;cursor:wait}
.teacher-secondary{border:1px solid var(--forest);background:#fff;color:var(--forest)}
.teacher-secondary:hover{background:var(--teal-soft)}
.teacher-form__note,.teacher-contact__privacy{font-size:.75rem;color:var(--muted);text-align:center;margin:8px 0 0}
.teacher-status{margin:12px 0 0;padding:10px 12px;border-left:3px solid var(--coral);background:#fff0ed;color:#7d2e20;font-size:.82rem}
.teacher-output{padding:24px;background:#f1f5f3;display:flex;min-width:0}
.teacher-empty{margin:auto;max-width:390px;text-align:center;color:var(--muted)}
.teacher-empty span{display:block;color:var(--forest);font-size:.72rem;text-transform:uppercase;font-weight:800}
.teacher-empty strong{display:block;color:var(--ink);font-size:1.55rem;margin:8px 0}
.teacher-empty p{margin:0;font-size:.9rem}
.teacher-result{width:100%;min-width:0}
.teacher-result__heading{border-bottom:1px solid var(--line);padding-bottom:14px;margin-bottom:14px}
.teacher-result__heading h3{font-size:1.35rem;line-height:1.22;margin:4px 0 6px}
.teacher-result__heading p{margin:0;color:var(--muted);font-size:.86rem}
.teacher-comparison{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:0 0 14px}
.teacher-comparison article{padding:13px;background:#fff;border-top:3px solid var(--gold)}
.teacher-comparison article:nth-child(2){border-color:var(--forest)}
.teacher-comparison article span,.teacher-comparison article small{display:block;color:var(--muted);font-size:.72rem}
.teacher-comparison article strong{display:block;font-size:1.18rem;margin:3px 0}
.teacher-comparison>div{grid-column:1/-1;padding:10px 12px;background:var(--charcoal);color:#fff;display:flex;justify-content:space-between;gap:12px}
.teacher-plan,.teacher-checks{display:grid;gap:7px}
.teacher-plan article,.teacher-checks article{display:grid;grid-template-columns:auto minmax(0,1fr);gap:10px;align-items:start;padding:10px 0;border-bottom:1px solid var(--line)}
.teacher-plan article>span,.teacher-checks article>span{min-width:66px;padding:3px 7px;border-radius:4px;text-align:center;background:#e2e8e5;color:var(--muted);font-size:.66rem;font-weight:800;text-transform:uppercase}
.teacher-plan article[data-state="ready"]>span,.teacher-checks article[data-state="ready"]>span{background:#dff3e9;color:#176247}
.teacher-plan article[data-state="missing"]>span,.teacher-checks article[data-state="alert"]>span{background:#fce1dc;color:#913826}
.teacher-plan strong,.teacher-checks strong{display:block;font-size:.84rem}
.teacher-plan p,.teacher-checks p{margin:2px 0 0;color:var(--muted);font-size:.77rem}
.teacher-disclaimer{font-size:.72rem;color:var(--muted);margin:12px 0}
.teacher-handoff{display:flex;align-items:center;justify-content:space-between;gap:14px;padding-top:13px;border-top:1px solid var(--line)}
.teacher-handoff strong{font-size:.84rem}.teacher-handoff p{margin:2px 0 0;color:var(--muted);font-size:.75rem}
.teacher-contact{display:grid;grid-template-columns:minmax(220px,1.4fr) 1fr 1fr auto;gap:14px;align-items:end;padding:20px 24px;border-top:1px solid var(--line);background:var(--gold-soft)}
.teacher-contact h3{margin:3px 0;font-size:1.08rem}.teacher-contact>div p{margin:0;color:var(--muted);font-size:.78rem}
.teacher-contact label{display:grid;gap:5px;font-size:.78rem;font-weight:750}.teacher-contact label span{color:var(--muted);font-size:.7rem}
.teacher-contact .teacher-primary{width:auto;margin:0;white-space:nowrap}
.teacher-contact__privacy,.teacher-contact .teacher-status{grid-column:1/-1}
.teacher-success{padding:20px 24px;background:#e2f5eb;border-top:1px solid #9ccbb7;color:#184d3b}
.teacher-success strong{font-size:1rem}.teacher-success p{margin:2px 0 0;font-size:.82rem}
.teacher-method,.teacher-sources,.teacher-author{max-width:1240px;margin:0 auto;padding:46px clamp(18px,4vw,54px)}
.teacher-method{display:grid;grid-template-columns:minmax(260px,.65fr) minmax(0,1.35fr);gap:42px}
.teacher-method h2,.teacher-sources h2,.teacher-author h2{font-size:1.65rem;line-height:1.2;margin:6px 0 10px}.teacher-method>div p{color:var(--muted)}
.teacher-method ol{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line)}
.teacher-method li{min-height:126px;background:var(--white);padding:16px}
.teacher-method li>span{color:var(--gold);font-size:.7rem;font-weight:850}.teacher-method li strong{display:block;margin:4px 0;font-size:.9rem}.teacher-method li p{margin:0;color:var(--muted);font-size:.76rem}
.teacher-sources{border-top:1px solid var(--line)}
.teacher-source-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:20px}
.teacher-source-grid article{padding:17px;border-left:3px solid var(--forest);background:#fff}
.teacher-source-grid article:nth-child(2){border-color:var(--gold)}.teacher-source-grid article:nth-child(3){border-color:var(--coral)}
.teacher-source-grid h3{margin:0 0 7px;font-size:1rem}.teacher-source-grid p{margin:0 0 9px;color:var(--muted);font-size:.82rem}.teacher-source-grid a{font-size:.8rem;font-weight:750}
.teacher-author{display:grid;grid-template-columns:96px minmax(0,1fr) auto;gap:20px;align-items:center;background:#e8efeb}
.teacher-author img{width:96px;height:96px;object-fit:cover;border-radius:8px}.teacher-author p{margin:0;color:var(--muted);font-size:.86rem;max-width:760px}.teacher-author>a{padding:11px 14px;border:1px solid var(--forest);border-radius:6px;text-decoration:none;font-weight:750;text-align:center}
.teacher-footer{min-height:72px;padding:18px clamp(18px,4vw,56px);display:flex;align-items:center;justify-content:space-between;gap:20px;background:var(--charcoal);color:#dce6e2;font-size:.8rem}
.teacher-footer nav{display:flex;gap:18px;flex-wrap:wrap}.teacher-footer a{color:#dce6e2}
@media(max-width:980px){
  .teacher-intro{grid-template-columns:1fr;gap:24px}.teacher-proof{max-width:620px}
  .teacher-tool{margin-left:14px;margin-right:14px}
  .teacher-workspace{grid-template-columns:1fr}.teacher-form{border-right:0;border-bottom:1px solid var(--line)}
  .teacher-output{min-height:330px}
  .teacher-contact{grid-template-columns:1fr 1fr}.teacher-contact>div,.teacher-contact__privacy,.teacher-contact .teacher-status{grid-column:1/-1}.teacher-contact .teacher-primary{width:100%}
  .teacher-method{grid-template-columns:1fr}.teacher-author{grid-template-columns:80px 1fr}.teacher-author img{width:80px;height:80px}.teacher-author>a{grid-column:1/-1}
}
@media(max-width:700px){
  .teacher-nav{align-items:flex-start}.teacher-nav nav{justify-content:flex-end;gap:10px}.teacher-nav nav a:nth-child(-n+2){display:none}
  .teacher-intro{padding-top:28px}.teacher-intro h1{font-size:2rem}
  .teacher-tool__head{grid-template-columns:54px 1fr;padding:15px}.teacher-tool__head img{width:54px;height:54px}.teacher-tool__head ol{grid-column:1/-1;justify-content:space-between}.teacher-tool__head li{min-width:0;flex:1}
  .teacher-mode{grid-template-columns:1fr}.teacher-form,.teacher-output,.teacher-contact{padding:18px}
  .teacher-fields--prepare,.teacher-fields--compare{grid-template-columns:1fr}
  .teacher-handoff{align-items:stretch;flex-direction:column}.teacher-secondary{width:100%}
  .teacher-contact{grid-template-columns:1fr}.teacher-contact>*{grid-column:1!important}
  .teacher-method ol,.teacher-source-grid{grid-template-columns:1fr}.teacher-method li{min-height:0}
  .teacher-author{grid-template-columns:70px 1fr}.teacher-author img{width:70px;height:70px}
  .teacher-footer{align-items:flex-start;flex-direction:column}
}
@media(max-width:420px){
  .teacher-brand strong{display:none}.teacher-nav nav{font-size:.78rem}
  .teacher-tool{margin-left:8px;margin-right:8px}.teacher-segments{grid-template-columns:1fr}.teacher-segments span{min-height:42px}
  .teacher-comparison{grid-template-columns:1fr}.teacher-comparison>div{grid-column:1}
}