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.lab-preview-dialog[open]{background:var(--surface);width:100vw;max-width:none;height:100dvh;max-height:none;color:var(--text);border:0;flex-direction:column;margin:0;padding:0;display:flex;position:fixed;inset:0}.course-deck .lab-preview-dialog-head{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;gap:16px;min-height:54px;padding:8px 18px;font-size:13px;display:flex}.course-deck .lab-preview-dialog iframe{background:#fff;border:0;flex:1;width:100%;min-height:0}.course-deck .lab-reference{border-top:1px solid var(--border);color:var(--muted)}.course-deck .lab-reference summary{color:var(--accent-ink);cursor:pointer;padding:12px 18px;font-size:11px;font-weight:700}.course-deck .lab-markup-wrap{margin-top:10px}.course-deck .lab-markup-wrap .lab-editor-shell{min-height:190px;max-height:260px;margin:0 10px 10px}.course-deck .lab-reference pre{border-top:1px solid var(--border);background:var(--ad-bg);max-height:240px;color:var(--text);margin:0;padding:14px 18px;font:11px/1.6 ui-monospace,SFMono-Regular,Consolas,monospace;overflow:auto}.course-deck .dartpad-frame-wrap{border:1px solid var(--card-border);background:var(--ad-bg);border-radius:8px;min-height:620px;margin:16px 18px;position:relative;overflow:hidden}.course-deck .dartpad-frame{background:var(--ad-bg);border:0;width:100%;height:620px;display:block}.course-deck .dartpad-loading{z-index:1;color:var(--muted);text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:12px;padding:20px;font-size:13px;display:flex;position:absolute;inset:0}.course-deck .dartpad-loading[hidden]{display:none}.course-deck .dartpad-loading a{color:var(--accent-ink);font-weight:700}.course-deck .dartpad-loading a[hidden]{display:none}.course-deck .dartpad-actions{flex-wrap:wrap;align-items:center;gap:12px;padding:0 18px 16px;display:flex}.course-deck .dartpad-actions .lab-reset{flex:none}.course-deck .dartpad-copy-status{color:var(--muted);font-size:11px}.course-deck .dartpad-actions a{color:var(--accent-ink);margin-left:auto;font-size:11px;font-weight:700;text-decoration:none}.course-deck .dartpad-actions a:hover{text-decoration:underline}.course-deck .practice-layout .full-lesson{grid-column:auto}.course-deck .stage-scroll.is-practice{flex-direction:column;padding-bottom:12px;display:flex}.course-deck .stage-scroll.is-practice .progress-track{flex:0 0 5px;margin:10px 0 12px}.course-deck .slide-practice:not([hidden]){flex-direction:column;flex:1 0 auto;min-height:max-content;display:flex}.course-deck .slide-practice .slide-heading{flex:none;padding-bottom:12px}.course-deck .slide-practice .slide-heading h2{margin:4px 0 0;font-size:clamp(23px,2.4vw,30px)}.course-deck .slide-practice .practice-layout{flex-direction:column;flex:1;gap:10px;padding:12px 0 0;display:flex}.course-deck .slide-practice .practice-panel{flex:none;gap:11px;padding:12px 15px}.course-deck .slide-practice .practice-icon{flex-basis:30px;width:30px;height:30px}.course-deck .slide-practice .practice-panel h3{margin:1px 0 2px;font-size:15px}.course-deck .slide-practice .practice-panel p{line-height:1.5}.course-deck .slide-practice .practice-lab{flex-direction:column;flex:1;display:flex}.course-deck .slide-practice .lab-toolbar{padding:10px 15px}.course-deck .slide-practice .lab-toolbar strong{font-size:15px}.course-deck .lab-toolbar>.lab-toolbar-actions{flex-direction:row;align-items:center;gap:8px}.course-deck .lab-toolbar-actions .lab-run,.course-deck .lab-toolbar-actions .lab-reset{white-space:nowrap;min-height:34px}.course-deck .slide-practice .lab-note{padding:7px 15px;font-size:11px;line-height:1.4}.course-deck .slide-practice .lab-workspace{flex:1;min-height:280px}.course-deck .slide-practice .lab-edit-column,.course-deck .slide-practice .lab-result-column{padding:12px 15px}.course-deck .slide-practice .lab-editor-shell,.course-deck .slide-practice .lab-code,.course-deck .slide-practice .lab-code-mount,.course-deck .slide-practice .lab-results{min-height:160px}.course-deck .slide-practice .lab-stdin-wrap{margin-top:8px}.course-deck .slide-practice .lab-stdin-wrap summary{color:var(--muted);cursor:pointer;font-size:11px;font-weight:700}.course-deck .slide-practice .lab-stdin-wrap textarea{margin-top:8px}.course-deck .slide-practice .full-lesson{margin:0 0 2px}@media (width<=800px){.course-deck .lab-workspace{grid-template-columns:minmax(0,1fr)}.course-deck .lab-splitter{display:none}.course-deck .lab-edit-column{border-right:0;border-bottom:1px solid var(--border)}.course-deck .lab-shortcut{display:none}.course-deck .slide-practice .practice-lab,.course-deck .slide-practice .lab-workspace{flex:none}}@media (width<=640px){.course-deck .slide-practice .lab-toolbar{flex-wrap:wrap}.course-deck .slide-practice .lab-toolbar-actions{flex-wrap:wrap;width:100%}.course-deck .slide-practice .lab-toolbar-actions .lab-language{margin-right:auto}.course-deck .lab-edit-column,.course-deck .lab-result-column{padding:13px}.course-deck .lab-toolbar{padding:12px 13px}.course-deck .lab-code,.course-deck .lab-code-mount{min-height:220px}.course-deck .dartpad-frame-wrap{min-height:560px;margin:12px}.course-deck .dartpad-frame{height:560px}.course-deck .dartpad-actions{padding:0 12px 14px}}