/* ============ AI Lab common styles v1.0 ============ */
:root{
  --c-bg:#f1f5f9; --c-card:#ffffff; --c-text:#0f172a; --c-sub:#475569;
  --c-pri:#4f46e5; --c-pri2:#7c3aed; --c-amber:#f59e0b; --c-green:#10b981; --c-red:#ef4444;
  --rad:14px; --shadow:0 1px 3px rgba(15,23,42,.08),0 4px 14px rgba(15,23,42,.06);
}
*{box-sizing:border-box}
html{font-size:16px}
body{margin:0;font-family:"Hiragino Kaku Gothic ProN","Hiragino Sans","BIZ UDPGothic",Meiryo,system-ui,sans-serif;background:var(--c-bg);color:var(--c-text);line-height:1.6}
a{color:var(--c-pri)}
h2{font-size:1.15rem}
.btn{display:inline-block;border:1px solid #cbd5e1;background:#fff;color:var(--c-text);border-radius:10px;padding:7px 12px;font-size:.85rem;cursor:pointer;text-decoration:none;line-height:1.2;font-family:inherit}
.btn:hover{border-color:var(--c-pri);color:var(--c-pri)}
.btn-primary{background:var(--c-pri);border-color:var(--c-pri);color:#fff}
.btn-primary:hover{background:#4338ca;color:#fff}
.btn-ghost{border-color:transparent;background:transparent}
.btn-warn{background:#fffbeb;border-color:var(--c-amber);color:#92400e}
.btn-warn.active{background:var(--c-amber);color:#fff}
.btn-done{background:#ecfdf5;border-color:var(--c-green);color:#065f46;cursor:default}
.btn:disabled{opacity:.7;cursor:default}
.lab-head{position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:10px;padding:10px 16px;background:#fff;box-shadow:var(--shadow);flex-wrap:wrap}
.lab-title{font-size:1.05rem;flex:1;min-width:200px}
.lab-ico{font-size:1.3rem}
.lab-badge{background:#eef2ff;color:var(--c-pri);border-radius:999px;padding:2px 10px;font-size:.75rem}
.lab-head-actions{display:flex;gap:6px;align-items:center}
.privacy-bar{background:#ecfdf5;color:#065f46;font-size:.8rem;padding:6px 16px;border-bottom:1px solid #a7f3d0}
.lab-main{display:flex;gap:14px;padding:14px 16px;max-width:1500px;margin:0 auto;align-items:flex-start}
.lab-steps{width:390px;flex-shrink:0;background:var(--c-card);border-radius:var(--rad);box-shadow:var(--shadow);padding:14px;position:sticky;top:70px;max-height:calc(100dvh - 90px);overflow:auto}
.lab-work{flex:1;background:var(--c-card);border-radius:var(--rad);box-shadow:var(--shadow);overflow:hidden;min-width:0}
.aside-title{margin:0 0 8px;font-size:1rem}
.step{padding:10px 0;border-bottom:1px dashed #e2e8f0}
.st-top{display:flex;gap:8px;align-items:center}
.st-num{background:var(--c-pri);color:#fff;border-radius:8px;min-width:24px;height:24px;display:inline-flex;align-items:center;justify-content:center;font-size:.8rem;font-weight:700}
.st-title{font-weight:700;flex:1}
.st-min{color:var(--c-sub);font-size:.75rem;white-space:nowrap}
.st-task{margin:6px 0 0;font-size:.88rem;color:#1e293b}
.st-hint{margin-top:6px;font-size:.8rem;color:var(--c-sub)}
.st-hint summary{cursor:pointer}
.st-done{display:inline-flex;gap:6px;align-items:center;margin-top:6px;font-size:.8rem;color:var(--c-sub)}
.step.st-done .st-title{text-decoration:line-through;opacity:.55}
.aside-foot{margin-top:10px}
.lab-prog{height:8px;background:#e2e8f0;border-radius:999px;overflow:hidden}
.lab-prog-fill{height:100%;width:0;background:linear-gradient(90deg,var(--c-pri),var(--c-pri2));transition:width .3s}
.lab-prog-label{font-size:.75rem;color:var(--c-sub);margin:4px 0 8px}
.btn-complete{width:100%;padding:10px;font-size:.95rem}
.notebook{margin-top:14px;border-top:2px solid #e2e8f0;padding-top:10px}
.notebook h3{margin:0 0 8px;font-size:.95rem}
.notebook input{width:100%;padding:7px 9px;margin-bottom:6px;border:1px solid #cbd5e1;border-radius:8px;font-size:.85rem;font-family:inherit}
.nb-actions{display:flex;gap:6px;margin-bottom:8px;flex-wrap:wrap}
.nb-list{list-style:none;margin:6px 0 0;padding:0;font-size:.78rem;max-height:180px;overflow:auto}
.nb-list li{background:#f8fafc;border:1px solid #e2e8f0;border-radius:8px;padding:5px 8px;margin-bottom:5px;display:flex;gap:6px;align-items:center}
.nb-del{margin-left:auto;border:0;background:#fee2e2;color:#b91c1c;border-radius:6px;width:20px;height:20px;cursor:pointer;font-weight:700;flex-shrink:0}
.lab-teacher{margin:12px 16px 0;background:#fffbeb;border:2px solid var(--c-amber);border-radius:var(--rad);padding:14px 18px}
.lab-teacher h2{margin-top:0}
.t-cols{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.lab-teacher h3{font-size:.9rem;color:#92400e;margin:10px 0 4px}
.lab-teacher ul,.lab-teacher ol{margin:4px 0;padding-left:20px;font-size:.88rem}
body.lab-teach .lab-steps{font-size:1.08rem}
.term{border-bottom:2px dotted var(--c-pri);cursor:help}
.term-pop{position:fixed;z-index:99;max-width:280px;background:#1e293b;color:#fff;border-radius:10px;padding:10px 12px;font-size:.8rem;line-height:1.5;box-shadow:0 6px 20px rgba(0,0,0,.25)}
.lab-toast{position:fixed;left:50%;bottom:26px;transform:translateX(-50%) translateY(20px);background:#1e293b;color:#fff;padding:10px 18px;border-radius:999px;font-size:.85rem;opacity:0;transition:all .25s;z-index:100;pointer-events:none}
.lab-toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.lab-dialog-backdrop{position:fixed;inset:0;background:rgba(15,23,42,.4);z-index:90;display:flex;align-items:center;justify-content:center}
.lab-dialog{background:#fff;border-radius:14px;padding:18px 20px;width:min(380px,92vw);box-shadow:0 10px 40px rgba(0,0,0,.3)}
.lab-dialog h3{margin:0 0 10px}
.fs-row{display:block;margin:6px 0;font-size:.9rem}
.dlg-actions{display:flex;gap:8px;justify-content:flex-end;margin-top:12px;flex-wrap:wrap}
.lab-rm *,.lab-rm *::before,.lab-rm *::after{animation:none !important;transition:none !important}
@media (max-width:980px){
  .lab-main{flex-direction:column}
  .lab-steps{width:100%;position:static;max-height:none;order:2}
  .lab-work{order:1;width:100%}
  .t-cols{grid-template-columns:1fr}
}
/* ---- work area shared ---- */
.work-pad{padding:18px}
.panel{border:1px solid #e2e8f0;border-radius:12px;padding:14px;background:#fff;margin-bottom:14px}
.panel h3{margin:0 0 8px;font-size:.98rem}
.panel p{font-size:.88rem}
.muted{color:var(--c-sub);font-size:.85rem}
.chip{display:inline-block;background:#eef2ff;color:#3730a3;border-radius:999px;padding:2px 10px;font-size:.75rem;margin:2px}
.status-box{border-radius:10px;padding:8px 12px;font-size:.85rem;margin:8px 0;display:none}
.status-ok{color:#065f46;background:#ecfdf5;border:1px solid #a7f3d0}
.status-err{color:#b91c1c;background:#fef2f2;border:1px solid #fecaca}
.bar-row{display:flex;align-items:center;gap:8px;margin:4px 0;font-size:.85rem}
.bar-track{flex:1;height:14px;background:#e2e8f0;border-radius:999px;overflow:hidden}
.bar-fill{height:100%;background:linear-gradient(90deg,var(--c-pri),var(--c-pri2));border-radius:999px;transition:width .4s}
.quiz-opt{display:flex;gap:8px;flex-wrap:wrap;margin:6px 0}
.quiz-q{background:#f8fafc;border:1px solid #e2e8f0;border-radius:10px;padding:10px 12px;margin-bottom:10px}
.quiz-fb{font-size:.8rem;margin-top:6px;display:none;padding:6px 10px;border-radius:8px}
.quiz-fb.ok{display:block;background:#ecfdf5;color:#065f46}
.quiz-fb.ng{display:block;background:#fef2f2;color:#b91c1c}
@keyframes pop{0%{transform:scale(.96);opacity:0}100%{transform:scale(1);opacity:1}}
.panel{animation:pop .25s ease-out}