.nsl-lab{--nsl-ink:#183343;--nsl-muted:#526979;--nsl-line:#d4e0e5;--nsl-accent:#006b61;--nsl-pale:#e9f4ef;--nsl-bg:#f5f8fa;box-sizing:border-box;background:var(--nsl-bg);color:var(--nsl-ink);font:16px/1.5 system-ui,-apple-system,sans-serif;border:1px solid var(--nsl-line);border-radius:18px;padding:clamp(16px,3vw,32px);max-width:1200px;margin:24px auto;isolation:isolate}
.nsl-lab *{box-sizing:border-box}.nsl-lab h2,.nsl-lab h3,.nsl-lab h4{font-family:inherit;font-weight:650;color:var(--nsl-ink);line-height:1.25;margin:0 0 16px}.nsl-lab h2{font-size:30px}.nsl-lab h3{font-size:23px}.nsl-lab p{margin:10px 0 16px}.nsl-lab .nsl-header{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;border-bottom:1px solid var(--nsl-line);padding-bottom:20px;margin-bottom:20px}.nsl-lab .nsl-kicker{font-size:11px;font-weight:700;letter-spacing:.12em;color:var(--nsl-accent);display:block;margin-bottom:8px}.nsl-lab .nsl-badge{display:inline-block;border-radius:30px;padding:7px 12px;background:var(--nsl-pale);color:#165348;font-size:13px}.nsl-lab .nsl-card{background:#fff;border:1px solid var(--nsl-line);border-radius:12px;padding:22px;margin:14px 0}.nsl-lab .nsl-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,240px),1fr));gap:18px}.nsl-lab label{display:block;font-weight:600;margin:0 0 14px}.nsl-lab input,.nsl-lab select,.nsl-lab textarea{display:block;width:100%;max-width:100%;padding:12px!important;border:1px solid #adbec9!important;border-radius:7px!important;background:#fff!important;color:#183343!important;font:400 16px/1.5 system-ui!important;box-shadow:none;margin:6px 0 0}.nsl-lab textarea{min-height:90px;resize:vertical}.nsl-lab input:focus-visible,.nsl-lab button:focus-visible,.nsl-lab select:focus-visible,.nsl-lab textarea:focus-visible{outline:3px solid #5d8faa;outline-offset:2px}.nsl-lab button{font:600 15px/1.4 system-ui;padding:11px 16px;min-height:44px;background:var(--nsl-accent);color:#fff;border:1px solid var(--nsl-accent);border-radius:8px;cursor:pointer;margin:0;text-transform:none;letter-spacing:normal}.nsl-lab button:disabled{opacity:.55;cursor:default}.nsl-lab button.nsl-secondary{background:#fff;color:#1c5366;border-color:#adbec9}.nsl-lab button.nsl-danger{background:#a12e25;border-color:#a12e25}.nsl-lab .nsl-actions{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin:14px 0}.nsl-lab .nsl-subtle{color:var(--nsl-muted);font-size:14px}.nsl-lab .nsl-code{font-size:32px;font-weight:750;letter-spacing:.15em;font-variant-numeric:tabular-nums;color:var(--nsl-accent)}.nsl-lab .nsl-clock{font-variant-numeric:tabular-nums;font-size:26px;font-weight:700;white-space:nowrap}.nsl-lab .nsl-phase{display:flex;justify-content:space-between;gap:12px;align-items:center;padding:14px 18px;background:#dfedf1;border-radius:10px;margin:12px 0}.nsl-lab .nsl-warning{border-left:4px solid #b06a00;background:#fff5e4;padding:16px;border-radius:5px;margin:12px 0;color:#63420d}.nsl-lab .nsl-error{color:#862923;background:#fff0ed;border:1px solid #e3b8b0;padding:12px;border-radius:6px}.nsl-lab .nsl-success{color:#13613c;background:#e4f5e8;padding:12px;border-radius:6px}.nsl-lab .nsl-table{width:100%;border-collapse:collapse;text-align:left;font-size:14px}.nsl-lab .nsl-table td,.nsl-lab .nsl-table th{padding:12px 10px;border-bottom:1px solid var(--nsl-line);vertical-align:top;word-break:break-word}.nsl-lab .nsl-table th{font-size:12px;text-transform:uppercase;color:var(--nsl-muted)}.nsl-lab .nsl-entry{max-width:570px;margin:25px auto}.nsl-lab .nsl-split{display:grid;grid-template-columns:minmax(0,1.7fr) minmax(240px,1fr);gap:20px}.nsl-lab .nsl-value{font-size:28px;font-weight:700;color:var(--nsl-accent)}.nsl-lab details{border-top:1px solid var(--nsl-line);padding:14px 0}.nsl-lab summary{cursor:pointer;font-weight:600}.nsl-lab ul{padding-left:22px}.nsl-lab #nsl-message:empty{display:none}.nsl-lab .nsl-step{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px;color:#596c77;font-size:13px}.nsl-lab .nsl-step span{padding:4px 9px}.nsl-lab .nsl-step .active{background:#d1eade;color:#144c39;border-radius:5px;font-weight:700}.nsl-lab .nsl-private{background:#eaf3f1;padding:16px;border-radius:10px}.nsl-lab .nsl-note{white-space:pre-wrap}.nsl-lab progress{width:100%;accent-color:var(--nsl-accent)}
@media(max-width:650px){.nsl-lab .nsl-split{grid-template-columns:1fr}.nsl-lab .nsl-table,.nsl-lab .nsl-table tbody,.nsl-lab .nsl-table tr,.nsl-lab .nsl-table td{display:block;width:100%}.nsl-lab .nsl-table thead{display:none}.nsl-lab .nsl-table tr{border:1px solid var(--nsl-line);margin:12px 0;border-radius:8px;padding:8px}.nsl-lab .nsl-table td{padding:6px;border:0}.nsl-lab .nsl-actions button{flex-grow:1}.nsl-lab h2{font-size:26px}.nsl-lab .nsl-card{padding:16px}.nsl-lab .nsl-header{align-items:start}.nsl-lab .nsl-code{font-size:25px}}
.nsl-lab .nsl-history{border-top:1px solid var(--nsl-line);padding:16px 0}.nsl-lab fieldset{border:1px solid var(--nsl-line);border-radius:8px;margin:14px 0;padding:16px}.nsl-lab.nsl-projection{position:fixed;inset:0;z-index:1000000;max-width:none;margin:0;border-radius:0;overflow:auto}

/* Recorded negotiation: all selectors stay inside the laboratory. */
.nsl-lab .nsl-conversation{max-height:25rem;overflow-y:auto;border:1px solid #d4e0e5;border-radius:12px;padding:12px;background:#f7fafb;overscroll-behavior:contain}
.nsl-lab .nsl-event{padding:12px;margin:0 0 10px;border-radius:10px;background:white;border:1px solid #dce6ea;overflow-wrap:anywhere}
.nsl-lab .nsl-event p{white-space:pre-wrap;margin:6px 0 0}
.nsl-lab .nsl-event-offer,.nsl-lab .nsl-event-accept{border-left:4px solid #197968}
.nsl-lab .nsl-event-no_agreement,.nsl-lab .nsl-event-decline{border-left:4px solid #b77428}
.nsl-lab .nsl-event-meta{display:flex;flex-wrap:wrap;gap:4px 12px;justify-content:space-between;font-size:.8rem}
.nsl-lab .nsl-event-meta time{color:#496574}
.nsl-lab .nsl-number-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.nsl-lab .nsl-question-options{margin:18px 0;padding:12px}
.nsl-lab .nsl-question-options label{display:flex;align-items:flex-start;gap:10px;margin:12px 0;font-weight:400}
.nsl-lab .nsl-question-options input[type=checkbox]{width:20px;height:20px;flex:0 0 20px;margin-top:3px;accent-color:#197968}
.nsl-lab #nsl-message-form,.nsl-lab #nsl-offer-form{padding:16px 0;border-bottom:1px solid #d4e0e5;margin-bottom:16px}
.nsl-lab .nsl-table-scroll{overflow-x:auto}
.nsl-lab .nsl-table-actions{display:flex;flex-direction:column;gap:8px;min-width:150px}
.nsl-lab .nsl-table-actions button{font-size:.85rem;padding:8px 12px}
.nsl-lab .nsl-prewrap{white-space:pre-wrap;overflow-wrap:anywhere}
.nsl-lab fieldset{min-width:0}
.nsl-lab input,.nsl-lab select,.nsl-lab textarea{max-width:100%;min-width:0}
.nsl-lab .nsl-split>*{min-width:0}
@media(max-width:600px){.nsl-lab .nsl-number-grid{grid-template-columns:1fr}.nsl-lab .nsl-event-meta{display:block}.nsl-lab .nsl-event-meta time{display:block}.nsl-lab .nsl-question-options{padding:8px}.nsl-lab .nsl-conversation{max-height:22rem}}
.nsl-lab .nsl-feedback-action{border-left:4px solid var(--nsl-accent);padding:16px;margin:20px 0;background:var(--nsl-pale);border-radius:6px}
.nsl-lab .nsl-feedback-values{display:flex;flex-wrap:wrap;gap:24px}.nsl-lab .nsl-feedback-values strong{font-size:1.35rem}
.nsl-lab .nsl-feedback-detail{border-bottom:1px solid var(--nsl-line);padding:12px 0;overflow-wrap:anywhere}
.nsl-lab .nsl-feedback-plan{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:12px}.nsl-lab .nsl-feedback-plan dd{margin:0;font-weight:600}
.nsl-lab #nsl-my-plan button{display:block;width:100%;text-align:left;margin:12px 0;white-space:normal;overflow-wrap:anywhere}
.nsl-lab #nsl-feedback,.nsl-lab #nsl-teacher-feedback,.nsl-lab #nsl-old-feedback{overflow-wrap:anywhere;min-width:0}
.nsl-lab .nsl-evidence .nsl-event{margin:10px 0}.nsl-lab details>summary{cursor:pointer}