.lab{max-width:900px;margin-inline:auto}
.lab h1{font-size:clamp(1.9rem,5vw,3rem);line-height:1.12;margin-bottom:.4rem}
.lab h2{font-size:clamp(1.3rem,3vw,1.7rem);margin-top:2.2rem;border-top:1px solid var(--line);padding-top:1.1rem}
.lab h3{font-size:1.1rem;margin-top:1.4rem}
.lab p,.lab li{line-height:1.65}
.lab .lede{font-size:1.1rem;color:var(--ink-soft)}
.lab .crumbs{font-size:.92rem;margin:0 0 .8rem}
.lab .chips{display:flex;flex-wrap:wrap;gap:.45rem;margin:.8rem 0 1.2rem;padding:0;list-style:none}
.lab .chips li{background:var(--card);border:1px solid var(--line);border-radius:99px;padding:.25rem .8rem;font-size:.88rem;font-weight:700}
.lab .chips li.std{border-color:var(--brand-mid);color:var(--brand-mid)}
.lab .callout{border-left:4px solid var(--accent);background:var(--card);padding:.7rem 1rem;border-radius:0 8px 8px 0;margin:1rem 0}
.lab .safety{border-left-color:#921D1D}
.lab .two{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1rem}
.lab .two>div{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:.2rem 1rem 1rem}
.lab ol.steps{padding-left:1.3rem}
.lab ol.steps li{margin:.5rem 0}
.lab table.plain{border-collapse:collapse;width:100%;font-size:.95rem;margin:.8rem 0}
.lab table.plain th,.lab table.plain td{border:1px solid var(--line);padding:.4rem .6rem;text-align:left;vertical-align:top}
.lab table.plain th{background:rgba(31,93,63,.1)}
.lab .tablewrap{overflow-x:auto}
.lab details.teacher{border:1px solid var(--line);border-radius:10px;padding:.6rem 1rem;margin:1.2rem 0;background:var(--card)}
.lab details.teacher summary{cursor:pointer;font-weight:800}
.lab .vocab{display:flex;flex-wrap:wrap;gap:.4rem;padding:0;list-style:none}
.lab .vocab li{background:rgba(31,93,63,.1);border-radius:6px;padding:.15rem .6rem;font-size:.9rem}
.lab .qa li{margin:.7rem 0}
.lab .answerline{display:block;border-bottom:1px solid var(--line-control);height:1.8rem;margin-top:.3rem}
.datalab{margin:1rem 0}
.datalab table{border-collapse:collapse;width:100%;font-size:.95rem}
.datalab th,.datalab td{border:1px solid var(--line);padding:.25rem .4rem;text-align:center}
.datalab th:first-child,.datalab td:first-child{text-align:left}
.datalab input{width:5.2rem;max-width:100%;font:inherit;padding:.35rem;border:1px solid var(--line-control);border-radius:6px;text-align:center;background:var(--card);color:var(--ink)}
.datalab td.mean{font-weight:800}
.datalab .dl-btns{display:flex;gap:.6rem;flex-wrap:wrap;margin:.7rem 0}
.datalab .dl-btns button{font:inherit;font-weight:700;padding:.55rem .9rem;min-height:44px;border-radius:8px;border:1px solid var(--line-control);background:var(--card);color:var(--ink);cursor:pointer}
.datalab svg{width:100%;max-width:640px;height:auto;display:block;margin:.6rem auto;background:var(--card);border:1px solid var(--line);border-radius:8px}
.datalab figcaption{font-size:.9rem;color:var(--ink-soft);text-align:center}
.profile-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:.8rem;margin:1rem 0}
.profile{background:var(--card);border:1.5px solid var(--line-control);border-radius:10px;padding:.7rem .9rem;break-inside:avoid}
.profile h4{margin:0 0 .3rem;font-size:1rem}
.profile p{margin:.25rem 0;font-size:.92rem;line-height:1.45}
.profile .tag{font-size:.78rem;font-weight:800;text-transform:uppercase;letter-spacing:.06em;color:var(--brand-mid)}
.printonly{display:none}
@media print{
  .site-header,.footer,.crumbs,.dl-btns,.noprint,.lab details.teacher:not([open]){display:none!important}
  .lab{max-width:none}
  .lab h2{break-after:avoid}
  .datalab input{border:0;border-bottom:1px solid #000;width:4rem}
  .profile-grid{grid-template-columns:repeat(2,1fr)}
}