/* AI-collaborative teaching — design preview (2026-11-08) */
.ai-pill{display:inline-block;margin-top:.8rem;padding:.2rem .7rem;border:1px solid var(--rg,#d9a982);border-radius:99px;font-size:.8rem;opacity:.85}
.ai-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem}
.ai-steps{counter-reset:s;list-style:none;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem}
.ai-steps li{counter-increment:s;background:#fff;border:1px solid var(--line);border-radius:10px;padding:1rem}
.ai-steps li::before{content:counter(s);display:block;font-size:1.6rem;color:var(--rgd,#9a6a48)}
.ai-steps b,.ai-steps span{display:block}
.ai-faq{border-bottom:1px solid var(--line);padding:.6rem 0}.ai-faq summary{cursor:pointer;font-weight:600}
.ai-home{padding-top:0}.ai-card{border-left:4px solid var(--rg,#d9a982)}
.ai-app{max-width:760px}
.ai-banner{background:var(--sand2,#f4ece3);border-radius:8px;padding:.6rem .9rem;font-size:.9rem}
.ai-progress{display:flex;gap:.5rem;list-style:none;padding:0;margin:1rem 0}
.ai-progress li{flex:1;text-align:center;padding:.5rem;border-bottom:3px solid var(--line);font-size:.9rem;color:var(--muted,#6b6b6b)}
.ai-progress li.on{border-color:var(--rgd,#9a6a48);color:inherit;font-weight:600}
.ai-progress li.ok{border-color:var(--rg,#d9a982)}
.ai-step{border:0;padding:0;margin:0}.ai-step legend{font-size:1.3rem;font-weight:600;margin-bottom:.5rem}
.ai-q{margin:1rem 0}.ai-lab{display:block;font-weight:600;margin-bottom:.3rem}
.ai-app input[type=text],.ai-app input:not([type]),.ai-app textarea{width:100%;box-sizing:border-box;padding:.6rem;border:1px solid #bbb;border-radius:6px;font:inherit}
.ai-app input[type=file]{max-width:100%}
.ai-app label{display:block;margin:.4rem 0 .2rem}
.ai-chk{display:flex!important;gap:.5rem;align-items:flex-start;margin:.5rem 0}.ai-chk input{margin-top:.25rem;width:1.1rem;height:1.1rem}
.ai-err{color:var(--red,#a33);font-size:.9rem;margin:.2rem 0}
[aria-invalid=true]{border-color:var(--red,#a33)!important}
.ai-hint,.ai-small,.ai-note{font-size:.88rem;color:var(--muted,#6b6b6b)}
.ai-file{font-size:.9rem}
.ai-tip{background:#fff;border:1px dashed var(--rg,#d9a982);padding:.6rem .8rem;border-radius:8px;margin:.6rem 0}
.ai-nav{display:flex;gap:.8rem;justify-content:space-between;margin-top:1.2rem;flex-wrap:wrap}
.ai-nav #next,.ai-nav #sim{margin-left:auto}
.ai-sum{display:grid;grid-template-columns:max-content 1fr;gap:.3rem 1rem}.ai-sum dt{font-weight:600}.ai-sum dd{margin:0;word-break:break-word}
.ai-done{margin-top:1rem;padding:1rem;border:2px solid var(--ok,#2f7a55);border-radius:8px;background:#fff}
@media(max-width:600px){.ai-sum{grid-template-columns:1fr}.ai-progress li{font-size:.8rem;padding:.4rem .2rem}.ai-nav .btn{flex:1}}