/* A hands-on workbench. Course reading lives in Topics. */
body[data-page='laboratory'] .page-hero { display: none; }
body[data-page='laboratory'] .page-section { padding-top: 32px; }
#laboratory-app { min-width: 0; }
.lab-workspace-intro { margin: 0 0 30px; }
.lab-eyebrow { color: #497c6d; font-size: 10px; font-weight: 600; letter-spacing: .09em; text-transform: uppercase; line-height: 1.6; margin: 0 0 12px; }
.lab-workspace-intro h1 { margin: 0 0 14px; font: 600 clamp(32px,4vw,48px)/1.2 var(--display); letter-spacing: -.035em; color: var(--blue-night); }
.lab-workspace-intro > p:last-child { margin: 0; font-size: 15px; line-height: 1.8; color: var(--muted); }
.lab-workspace { display: grid; grid-template-columns: 280px minmax(0,1fr); gap: 28px; align-items: start; }
.lab-toolbox { border: 1px solid #dce5ee; border-radius: 12px; background: #fff; min-width: 0; position: sticky; top: 110px; }
.lab-toolbox-toggle { display: none; }
.lab-library { padding: 20px 16px 12px; }
.lab-library-heading { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 16px; }
.lab-library-heading h2 { font: 600 19px var(--display); color: var(--blue-night); margin: 0; }
.lab-library-count { font-size: 11px; color: #678378; background: #edf5f1; border: 1px solid #d8e7df; border-radius: 20px; padding: 5px 9px; }
.lab-search { display: block; margin-bottom: 12px; }
.lab-search input,.lab-library-filters select { width: 100%; min-width: 0; min-height: 44px; padding: 10px; border: 1px solid #d8e2ed; border-radius: 6px; background: #f8fafc; color: var(--blue-night); font: 400 13px var(--display); }
.lab-library-filters { display: grid; gap: 8px; padding-bottom: 16px; border-bottom: 1px solid #edf0f5; }
.lab-clear { justify-self: start; padding: 5px 0; min-height: 36px; font: 500 12px var(--display); background: none; border: none; color: #526e90; text-decoration: underline; text-underline-offset: 4px; cursor: pointer; }
.lab-tool-list { min-height: 140px; max-height: min(650px,calc(100dvh - 470px)); overflow-y: auto; scrollbar-width: thin; scrollbar-color: #b6c8d5 transparent; overscroll-behavior: contain; padding-right: 4px; }
.lab-tool-group { padding-top: 18px; }
.lab-tool-group h3 { font: 600 11px/1.5 var(--display); color: #71879d; margin: 0 0 8px 8px; }
.lab-tool-group ul { margin: 0; padding: 0; list-style: none; }
.lab-tool-link { display: grid; gap: 4px; padding: 11px 10px; min-height: 52px; border-radius: 6px; font-size: 13px; line-height: 1.5; color: #3e5878; }
.lab-tool-link small { font-size: 10px; color: #8798ad; }
.lab-tool-link:hover { background: #f3f7fb; }
.lab-tool-link[aria-current] { background: #edf6f2; box-shadow: inset 3px 0 #438771; color: #24634e; }
.lab-tool-link[aria-current] small { color: #719989; }
.lab-experiment { min-width: 0; border: 1px solid #d4e4dc; border-radius: 14px; background: #f3f8f5; padding: 26px; }
.lab-experiment-heading { scroll-margin-top: 110px; outline: none; }
.lab-experiment-heading h2 { margin: 0 0 20px; font: 600 clamp(25px,3vw,35px)/1.3 var(--display); letter-spacing: -.025em; color: var(--blue-night); }
.lab-experiment-toolbar { display: flex; align-items: center; flex-wrap: wrap; gap: 14px 20px; margin: 0 0 26px; }
.lab-button,.lab-workspace .topic-button { min-height: 44px; padding: 10px 14px; font: 500 12px/1.5 var(--display); border: 1px solid #bfd7cc; border-radius: 6px; background: #fff; color: #2c7159; cursor: pointer; }
.lab-button:hover,.lab-workspace .topic-button:hover { background: #e8f3ed; }
.lab-workspace .topic-button:disabled { opacity: .4; cursor: default; }
.lab-theory-link { display: inline-flex; align-items: center; min-height: 44px; font-size: 12px; font-weight: 500; color: #3a668c; }
.lab-theory-link:hover { text-decoration: underline; }
.lab-model { min-width: 0; }
.lab-workspace .demo-controls { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 14px 22px; }
.lab-workspace .demo-control { display: grid; grid-template-columns: minmax(0,1fr) auto; gap: 7px; font-size: 12px; color: #52766d; min-width: 0; }
.lab-workspace .demo-control output { font-size: 14px; font-weight: 600; color: #276752; }
.lab-workspace .demo-control input[type='range'] { grid-column: 1/-1; width: 100%; min-width: 0; min-height: 32px; accent-color: #3a876d; cursor: pointer; }
.lab-workspace .demo-control select { grid-column: 1/-1; width: 100%; min-width: 0; min-height: 44px; padding: 9px; border: 1px solid #cfdfd8; border-radius: 6px; font: 400 14px var(--display); background: #fff; color: #396f5d; }
.lab-workspace .demo-check { grid-column: 1/-1; display: flex; align-items: center; gap: 8px; min-height: 40px; color: #52766d; font-size: 13px; }
.lab-workspace .demo-stage { min-width: 0; margin-top: 20px; padding: 20px; border: 1px solid #e0ebe5; border-radius: 10px; background: white; text-align: center; overflow-wrap: anywhere; }
.lab-workspace .demo-stage svg { display: block; width: 100%; height: auto; max-height: 380px; font-family: var(--display); }
.lab-workspace .demo-result { display: block; margin: 10px 0 0; font: 600 21px/1.7 var(--display); color: #2c5c7e; overflow-wrap: anywhere; }
.lab-workspace .demo-note,.lab-workspace .demo-statement { margin: 9px 0; font-size: 13px; line-height: 1.8; color: #6d8397; }
.lab-workspace .demo-stage > .topic-button { margin: 10px 5px 0; }
.lab-workspace .demo-position-strip,.lab-workspace .demo-edge-buttons { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px; margin: 16px 0 0; }
.lab-workspace .demo-position-strip span { display: grid; place-items: center; width: 28px; height: 28px; border-radius: 4px; font-size: 12px; }
.lab-workspace .winning { color: #356a58; background: #e0f0e9; }.lab-workspace .losing { color: #9d6435; background: #fcf0d9; }
.lab-workspace .demo-edge-buttons .topic-button { padding: 6px 9px; min-height: 40px; }
.lab-experiment-plan { margin-top: 24px; padding: 20px; background: #e9f2ec; border-radius: 9px; color: #5d7b6e; }
.lab-experiment-plan h3,.lab-notebook h3 { font: 600 18px/1.4 var(--display); margin: 0 0 12px; color: #2d6551; }
.lab-experiment-plan ol { margin: 0; padding-left: 20px; font-size: 13px; line-height: 1.85; }
.lab-experiment-plan li + li { margin-top: 6px; }
.lab-notebook { margin-top: 26px; }
.lab-notebook-fields { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 16px; }
.lab-notebook label { display: grid; gap: 8px; color: #597b6a; font-size: 12px; min-width: 0; }
.lab-notebook textarea { width: 100%; min-width: 0; min-height: 110px; padding: 12px; border: 1px solid #cfdfd6; border-radius: 7px; background: #fff; color: var(--blue-night); font: 400 14px/1.7 var(--display); resize: vertical; }
.lab-notes-hint { font-size: 11px; line-height: 1.7; color: #80998b; margin: 10px 0 0; }
.lab-empty { color: #708798; font-size: 14px; line-height: 1.8; padding: 16px; }
.lab-workspace :where(a,button,input,select,textarea,summary):focus-visible { outline: 2px solid #39846a; outline-offset: 3px; }
@media(max-width:999px) {
 .lab-workspace { grid-template-columns: minmax(0,1fr); gap: 18px; }
 .lab-toolbox { position: static; }
 .lab-toolbox-toggle { display: flex; flex-direction: column; gap: 5px; padding: 16px 42px 16px 18px; position: relative; cursor: pointer; list-style: none; }
 .lab-toolbox-toggle::-webkit-details-marker { display: none; }.lab-toolbox-toggle::after { content: '⌄'; position: absolute; right: 20px; top: 20px; font-size: 20px; color: #639080; }
 .lab-toolbox[open] .lab-toolbox-toggle::after { content: '⌃'; }
 .lab-toolbox-toggle strong { font-size: 14px; color: #2f6d58; }.lab-toolbox-toggle span { font-size: 12px; line-height: 1.6; color: #7a8b9d; }
 .lab-library { border-top: 1px solid #e4ece7; }
 .lab-library-filters { grid-template-columns: repeat(2,minmax(0,1fr)); }
 .lab-tool-list { max-height: 45dvh; }
 .lab-experiment { padding: 24px; }
}
@media(max-width:600px) {
 body[data-page='laboratory'] .page-section { padding-top: 24px; }
 .lab-workspace-intro { margin-bottom: 24px; }.lab-workspace-intro h1 { font-size: 34px; }.lab-workspace-intro > p:last-child { font-size: 14px; }
 .lab-experiment { padding: 18px; border-radius: 10px; }.lab-experiment-heading h2 { font-size: 26px; }.lab-experiment-toolbar { gap: 10px; margin-bottom: 22px; }
 .lab-workspace .demo-controls { gap: 14px; }.lab-workspace .demo-control select,.lab-library-filters select,.lab-search input { font-size: 16px; }
 .lab-workspace .demo-stage { padding: 10px; }.lab-workspace .demo-result { font-size: 18px; }.lab-workspace .demo-stage svg { min-height: 140px; }
 .lab-notebook-fields { grid-template-columns: minmax(0,1fr); }.lab-notebook textarea { font-size: 16px; }
 .lab-experiment-plan { padding: 16px; }.lab-experiment-plan h3,.lab-notebook h3 { font-size: 17px; }
}

@media(min-width:1000px) and (max-height:650px) { .lab-toolbox { position: static; }.lab-tool-list { max-height: 240px; } }