:root{--color-page: #fafaf8;--color-surface: #fff;--color-text: #222;--color-muted: #60605c;--color-border: #b9b9b1;--color-accent: #245340;--color-accent-hover: #193e2f;--color-on-accent: #fff;--color-error: #9e2323;--color-code: #eeeee9;--color-highlight: #fff0a8;--space-small: .5rem;--space-medium: 1rem;--space-large: 2rem;--radius: .25rem}*{box-sizing:border-box}body{margin:0;background:var(--color-page);color:var(--color-text);font-family:system-ui,sans-serif;line-height:1.6}button,input,textarea{font:inherit}button{padding:var(--space-small) var(--space-medium);border:1px solid var(--color-accent);border-radius:var(--radius);background:var(--color-accent);color:var(--color-on-accent);cursor:pointer}button:hover{background:var(--color-accent-hover)}button:disabled{opacity:.6;cursor:default}input,textarea{display:block;width:100%;padding:var(--space-small);border:1px solid var(--color-border);border-radius:var(--radius);background:var(--color-surface);color:var(--color-text)}textarea{resize:vertical}label{display:block;margin-top:var(--space-medium);margin-bottom:var(--space-small)}a{color:var(--color-accent)}:focus-visible{outline:3px solid var(--color-accent);outline-offset:3px}.app{max-width:100rem;margin:0 auto;padding:var(--space-medium) var(--space-medium) 4rem}.auth{max-width:26rem;margin:var(--space-large) auto}.auth button{margin-top:var(--space-medium)}.header{display:flex;flex-wrap:wrap;align-items:center;gap:var(--space-medium);margin-bottom:var(--space-large);padding-bottom:var(--space-medium);border-bottom:1px solid var(--color-border)}.header h1{margin:0;font-size:1.5rem}.account{margin-left:auto;overflow-wrap:anywhere}.secondary{border-color:var(--color-border);background:var(--color-surface);color:var(--color-text)}.secondary:hover{background:var(--color-code)}.help{color:var(--color-muted);font-size:.875rem}.error{color:var(--color-error)}.answer-section{min-width:0}.markdown{overflow-wrap:anywhere}.markdown pre{overflow-x:auto;padding:var(--space-medium);background:var(--color-code)}.markdown blockquote{margin-left:0;padding-left:var(--space-medium);border-left:3px solid var(--color-border)}.markdown img{max-width:100%}.feedback-pane{min-width:0;border:1px solid var(--color-border);border-radius:var(--radius);background:var(--color-surface)}.feedback-summary,.feedback-panel-heading{display:flex;align-items:baseline;justify-content:space-between;gap:var(--space-medium)}.feedback-summary{padding:var(--space-medium)}.feedback-score{flex-shrink:0;font-size:1.5rem;font-weight:650;font-variant-numeric:tabular-nums}.feedback-score-scale{color:var(--color-muted);font-size:.875rem;font-weight:400}.feedback-tabs{display:flex;overflow-x:auto;padding:4px 4px 0;border-bottom:1px solid var(--color-border)}.feedback-tabs button{display:flex;flex:1 0 auto;align-items:center;justify-content:center;gap:var(--space-small);padding:var(--space-small);border:0;border-bottom:3px solid transparent;border-radius:0;background:transparent;color:var(--color-muted);font-size:.875rem;white-space:nowrap}.feedback-tabs button:hover{background:var(--color-code);color:var(--color-text)}.feedback-tabs [aria-selected=true]{border-bottom-color:var(--color-accent);color:var(--color-accent);font-weight:650}.feedback-tabs button:focus-visible{outline-offset:-3px}.feedback-tab-score{font-variant-numeric:tabular-nums}.feedback-panel{padding:var(--space-medium)}.feedback-panel-heading h3{margin:0;font-size:1rem}.feedback-panel .markdown>:last-child{margin-bottom:0}.feedback-reference{display:inline;padding:0;border:0;border-radius:0;background:transparent;color:var(--color-accent);text-align:left;text-decoration:underline;text-decoration-color:var(--color-border);text-underline-offset:.2em;overflow-wrap:anywhere}.feedback-reference:hover{background:var(--color-code);color:var(--color-accent-hover);text-decoration-color:currentcolor}.feedback-reference-group{margin-inline:.3em;font-size:.8em}.feedback-reference-group .feedback-reference+.feedback-reference{margin-left:var(--space-small)}.feedback-point{margin-top:var(--space-medium);padding:var(--space-small);border-left:3px solid transparent;overflow-wrap:anywhere}.feedback-point[data-highlighted=true]{border-left-color:var(--color-accent);background:var(--color-code)}.feedback-point .markdown>:first-child{margin-top:0}.feedback-evidence{margin:var(--space-small) 0 0;padding-left:var(--space-medium);border-left:2px solid var(--color-border);font-size:.875rem}.feedback-evidence p{margin:0 0 var(--space-small);white-space:pre-wrap}.feedback-gap{color:var(--color-muted);font-size:.8rem}.feedback-return{margin-top:var(--space-medium)}.submission mark{background:var(--color-highlight);color:var(--color-text);scroll-margin-block:var(--space-large)}.workspace{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);height:calc(100dvh - 11rem);min-height:24rem}.problem-pane,.response-pane{min-width:0;overflow-y:auto;padding:0 var(--space-large) var(--space-large);scrollbar-gutter:stable}.problem-pane{border-right:1px solid var(--color-border)}.pane-label{color:var(--color-muted);margin-top:0}.answer-section>h2{margin-top:0}.submission{white-space:pre-wrap;overflow-wrap:anywhere;font:inherit;tab-size:4}@media(max-width:48rem){.workspace{grid-template-columns:minmax(0,1fr);height:auto;min-height:0}.problem-pane,.response-pane{overflow-y:visible;padding:var(--space-medium) 0}.problem-pane{border-right:0;border-bottom:1px solid var(--color-border)}.header{gap:var(--space-small)}}.feedback-tooltip{position:fixed;z-index:1000;box-sizing:border-box;width:max-content;max-width:min(24rem,calc(100vw - 16px));max-height:calc(100vh - 16px);overflow:auto;padding:.75rem 1rem;border:1px solid var(--color-border);border-radius:var(--radius);background:var(--color-surface);color:var(--color-text);box-shadow:0 4px 16px color-mix(in srgb,var(--color-text) 12%,transparent);font-size:.875rem;line-height:1.5;overflow-wrap:anywhere;pointer-events:none}.feedback-tooltip>:first-child{margin-top:0}.feedback-tooltip>:last-child{margin-bottom:0}.feedback-tooltip-quote{white-space:pre-wrap}