:root{--text:#6b6375;--text-h:#08060d;--bg:#fff;--border:#e5e4e7;--code-bg:#f4f3ec;--accent:#aa3bff;--accent-bg:#aa3bff1a;--accent-border:#aa3bff80;--social-bg:#f4f3ec80;--shadow:#0000001a 0 10px 15px -3px, #0000000d 0 4px 6px -2px;--sans:system-ui, "Segoe UI", Roboto, sans-serif;--heading:system-ui, "Segoe UI", Roboto, sans-serif;--mono:ui-monospace, Consolas, monospace;font:18px/145% var(--sans);letter-spacing:.18px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;color:var(--text);background:var(--bg);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial}}@media (width<=1024px){:root{font-size:16px}}@media (prefers-color-scheme:dark){:root{--text:#9ca3af;--text-h:#f3f4f6;--bg:#16171d;--border:#2e303a;--code-bg:#1f2028;--accent:#c084fc;--accent-bg:#c084fc26;--accent-border:#c084fc80;--social-bg:#2f303a80;--shadow:#0006 0 10px 15px -3px, #00000040 0 4px 6px -2px}#social .button-icon{filter:invert()brightness(2)}}body{margin:0}#root{box-sizing:border-box;flex-direction:column;min-height:100svh;display:flex}h1,h2,h3{font-family:var(--heading);color:var(--text-h);font-weight:500}h1{letter-spacing:-.5px;margin:0 0 8px;font-size:32px}@media (width<=1024px){h1{font-size:26px}}h2{letter-spacing:-.24px;margin:0 0 8px;font-size:22px;line-height:118%}@media (width<=1024px){h2{font-size:19px}}h3{margin:0 0 6px;font-size:17px}p{margin:0 0 12px;line-height:155%}button,input,textarea,select{font:inherit;color:inherit}button{cursor:pointer}.app-shell{flex-direction:column;min-height:100svh;display:flex}.app-header{border-bottom:1px solid var(--border);align-items:baseline;gap:10px;padding:16px 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(prefers-color-scheme:dark){.error-banner{color:#ffb4a8;background:#ffb4a81a;border-color:#ffb4a859}}code,.counter{font-family:var(--mono);color:var(--text-h);border-radius:4px;display:inline-flex}code{background:var(--code-bg);padding:4px 8px;font-size:15px;line-height:135%}.landing-course-line{color:var(--text);margin-bottom:24px;font-size:15px}.phi-warning{background:var(--accent-bg);border:1px solid var(--accent-border);border-radius:8px;margin:24px 0;padding:16px}.phi-warning p{margin-bottom:12px}.phi-checkbox{color:var(--text-h);align-items:flex-start;gap:8px;font-size:14px;font-weight:600;display:flex}.phi-checkbox input{margin-top:3px}.lane-picker{gap:12px;margin-bottom:4px;display:flex}@media (width<=640px){.lane-picker{flex-direction:column}}.lane-card{text-align:left;border:1px solid var(--border);background:var(--bg);border-radius:8px;flex-direction:column;flex:1;gap:4px;padding:14px 16px;transition:border-color .15s,background .15s;display:flex}.lane-card:hover{border-color:var(--accent-border)}.lane-card.selected{border-color:var(--accent);background:var(--accent-bg)}.lane-card-label{color:var(--text-h);font-weight:600}.lane-card-blurb{color:var(--text);font-size:13px}.lane-note{color:var(--text);margin-bottom:24px;font-size:13px}.begin-button{background:var(--accent);color:#fff;border:none;border-radius:6px;padding:12px 24px;font-size:16px;font-weight:600}.begin-button:disabled{opacity:.45;cursor:not-allowed}.chat-panel{border:1px solid var(--border);border-radius:10px;margin-bottom:24px;padding:20px}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.chat-model-field{max-width:260px}.chat-model-field select{border:1px solid var(--border);background:var(--bg);color:var(--text-h);border-radius:6px;padding:8px 10px}.chat-model-field 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20px;font-size:15px;font-weight:600}.hub-cards{flex-direction:column;gap:10px;margin-bottom:28px;display:flex}.hub-card{text-align:left;border:1px solid var(--border);background:var(--bg);border-radius:8px;justify-content:space-between;align-items:center;padding:14px 16px;display:flex}.hub-card:hover{border-color:var(--accent-border)}.hub-card-title{color:var(--text-h);font-weight:600}.hub-card-status{color:var(--text);font-size:13px}.hub-card-status.done{color:#1a7f37;font-weight:600}@media (prefers-color-scheme:dark){.hub-card-status.done{color:#4ade80}}.finish-link{color:var(--accent);background:0 0;border:none;margin-bottom:24px;padding:0;font-weight:600}.backup-controls{border-top:1px solid var(--border);align-items:center;gap:12px;padding-top:16px;display:flex}.backup-controls button,.restore-backup-label{border:1px solid var(--border);background:var(--bg);cursor:pointer;border-radius:6px;padding:8px 14px;font-size:13px}.restore-backup-label 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ul{flex-wrap:wrap;gap:4px 16px;margin:0;padding:0;list-style:none;display:flex}.lab-progress li{color:var(--text);font-size:13px}.lab-progress-done{color:var(--text-h)}.lab-example{border:1px solid var(--border);border-radius:8px;margin-bottom:20px;padding:10px 14px}.lab-example summary{cursor:pointer;color:var(--text-h);font-size:14px;font-weight:600}.lab-example-body{margin-top:12px;font-size:14px}.lab-example-body p{margin-bottom:10px}.lab-example-exchange{margin-bottom:12px}.lab-hint{color:var(--text);font-size:13px;font-style:italic}.soft-warning{background:#c896001a;border:1px solid #c8960059;border-radius:6px;margin:8px 0 16px;padding:8px 12px;font-size:13px}.graded-badge{text-transform:uppercase;letter-spacing:.03em;color:var(--accent);background:var(--accent-bg);vertical-align:middle;border-radius:4px;margin-left:8px;padding:2px 6px;font-size:11px;font-weight:700;display:inline-block}.reflection-field textarea{resize:none;width:100%;font-family:var(--sans);overflow:hidden}.task-picker{flex-wrap:wrap;gap:10px;margin-bottom:20px;display:flex}.task-card{text-align:left;border:1px solid var(--border);background:var(--bg);border-radius:8px;flex-direction:column;flex:calc(50% - 10px);gap:4px;min-width:220px;padding:12px 14px;display:flex}.task-card:hover{border-color:var(--accent-border)}.task-card.selected{border-color:var(--accent);background:var(--accent-bg)}.task-card-lane{text-transform:uppercase;letter-spacing:.04em;color:var(--text);font-size:11px}.technique-checkboxes{flex-wrap:wrap;gap:12px;margin-bottom:16px;font-size:14px;display:flex}.technique-checkbox{align-items:center;gap:6px;display:flex}.tab-bar{border-bottom:1px solid var(--border);gap:4px;margin-bottom:20px;display:flex}.tab-button{color:var(--text);background:0 0;border:none;border-bottom:2px solid #0000;margin-right:20px;padding:10px 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10px;font-size:12px}.remove-attempt-button:hover{color:#b42318;border-color:#b42318}.category-picker{flex-wrap:wrap;gap:8px;margin-bottom:8px;display:flex}.category-button{border:1px solid var(--border);background:var(--bg);border-radius:999px;padding:6px 14px;font-size:13px}.category-button.selected{border-color:var(--accent);background:var(--accent-bg);font-weight:600}.add-attempt-button{border:1px dashed var(--border);width:100%;color:var(--text);background:0 0;border-radius:8px;margin-bottom:24px;padding:12px}.checklist{margin:0 0 24px;padding-left:20px}.checklist li{margin-bottom:6px;font-size:14px}.finish-actions{gap:12px;margin-bottom:16px;display:flex}.finish-actions button{background:var(--accent);color:#fff;border:none;border-radius:6px;padding:10px 18px;font-size:14px;font-weight:600}.finish-actions button:disabled{opacity:.6;cursor:not-allowed}.email-success{color:#1a7f37;background:#1a7f3714;border:1px solid #1a7f374d;border-radius:6px;margin:0 0 16px;padding:10px 12px;font-size:14px}@media (prefers-color-scheme:dark){.email-success{color:#4ade80;background:#4ade801a;border-color:#4ade8059}}.instructor-balance{border:1px solid var(--border);border-radius:8px;max-width:260px;margin:16px 0;padding:16px}.instructor-balance-row{justify-content:space-between;margin-bottom:8px;font-size:14px;display:flex}.instructor-balance-row:last-child{margin-bottom:0}.instructor-balance-label{color:var(--text)}