:root{--paper: #fafaf8;--surface: #ffffff;--sunken: #f2f2ef;--ink: #1a1f2b;--ink-muted: #5b6472;--ink-faint: #6b7280;--line: #e3e5e2;--line-strong: #c9ccc7;--accent: #2e4a7d;--accent-hover: #243a63;--accent-surface: #edf1f7;--state-processing: #2f6f73;--state-processing-surface: #e8f1f1;--state-settled: #4a6357;--state-settled-surface: #edf1ee;--state-needs-human: #8a5a22;--state-needs-human-surface: #f6efe4;--answer-correct: #2f6b45;--answer-correct-surface: #edf1ee;--answer-incorrect: #8c3a3a;--answer-incorrect-surface: #f7ecec;--type-display: 28px;--type-heading: 20px;--type-body: 16px;--type-label: 14px;--type-caption: 12px;--card-padding: 24px;--frame: 1440px;--page-pad-x: 40px;--page-pad-y: 32px;--radius: 8px;--radius-lg: 14px;--radius-chip: 4px}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:Be Vietnam Pro,Segoe 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var(--line)}.topbar .mark{width:28px;height:28px;border-radius:var(--radius);border:1px solid var(--line);background:var(--surface) url(/kriky-face.png) center / 22px 22px no-repeat}.topbar .brand{font-size:var(--type-body);font-weight:600}.topbar .spacer{flex:1}.topbar .identity{display:flex;align-items:baseline;gap:8px;font-size:var(--type-label);color:var(--ink-muted)}.topbar .identity .who{color:var(--ink);font-weight:600}.topbar .identity .code{font-size:var(--type-caption)}button{font:inherit;cursor:pointer;border-radius:var(--radius);border:none;color:var(--ink)}button:disabled{cursor:not-allowed;opacity:.5}.btn-primary{background:var(--accent);color:var(--paper);font-size:var(--type-caption);font-weight:600;padding:10px 18px;white-space:nowrap}.btn-primary:hover:not(:disabled){background:var(--accent-hover)}.btn-secondary{background:transparent;color:var(--ink);border:1px solid var(--line-strong);font-size:var(--type-caption);font-weight:600;padding:10px 18px;white-space:nowrap}.btn-cta{background:var(--accent);color:var(--paper);font-size:var(--type-label);font-weight:600;padding:12px 20px;white-space:nowrap}.btn-cta:hover:not(:disabled){background:var(--accent-hover)}.btn-report{display:inline-flex;align-items:center;gap:6px;line-height:15px;background:transparent;color:var(--accent);border:1px solid var(--line);border-radius:var(--radius);font-size:var(--type-caption);font-weight:600;padding:5px 9px}.btn-report.done{background:var(--sunken);color:var(--ink-muted);cursor:default;opacity:1}.btn-commit{background:var(--accent);color:var(--paper);font-size:var(--type-label);font-weight:600;padding:13px 18px;width:100%}.btn-commit:hover:not(:disabled){background:var(--accent-hover)}.btn-dialog{background:var(--accent);color:var(--paper);font-size:var(--type-label);font-weight:600;padding:11px 18px}.btn-dialog:hover:not(:disabled){background:var(--accent-hover)}.btn-dialog.quiet{background:transparent;color:var(--ink);border:1px solid var(--line-strong)}.signout-refused{color:var(--answer-incorrect);font-size:var(--type-caption)}.btn-signout{background:var(--sunken);color:var(--ink);border:none;font-size:var(--type-caption);font-weight:600;padding:7px 14px}.btn-quiet{background:transparent;color:var(--accent);border:none;padding:0;font-size:var(--type-caption);font-weight:600}.time-card{display:flex;align-items:baseline;gap:8px;background:var(--sunken);border-radius:var(--radius);padding:8px 12px}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:var(--card-padding)}.row{display:flex;align-items:center;gap:24px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px 20px}.row+.row{margin-top:10px}.row .col-name{width:540px}.row .col-dates{width:210px;font-size:var(--type-label);color:var(--ink-muted)}.row .col-status{width:150px;display:flex;justify-content:flex-end}.row 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var(--accent);background:var(--accent-surface);padding:13px 15px}.option.chosen .label{color:var(--accent)}.option .radio{width:18px;height:18px;border-radius:50%;border:2px solid var(--line);flex:none}.option.chosen .radio{border:5px solid var(--accent);background:transparent}.option .label{color:var(--ink-muted);font-size:var(--type-label);font-weight:600;width:12px;flex:none}.mark{display:inline-flex;align-items:center;gap:8px;font-size:var(--type-label);font-weight:600;font-variant-numeric:tabular-nums}.mark .glyph{width:16px;height:16px;border-radius:50%;border:2px solid currentColor}.mark.full{color:var(--answer-correct)}.mark.full .glyph{background:currentColor}.mark.half{color:var(--ink)}.mark.half .glyph{background:linear-gradient(to right,currentColor 50%,transparent 50%)}.mark.zero{color:var(--answer-incorrect)}.hoverable{position:relative}.hoverable .tip{position:absolute;right:calc(100% + 12px);top:50%;transform:translateY(-50%);width:320px;background:var(--ink);color:var(--surface);font-size:var(--type-caption);font-weight:400;line-height:1.25;padding:10px 14px;border-radius:var(--radius);display:none;z-index:5}.hoverable:hover .tip,.hoverable:focus-within .tip{display:block}.scrim{position:fixed;top:0;right:0;bottom:0;left:0;background:#0d0f1773;display:flex;align-items:center;justify-content:center;padding:24px;z-index:10}.dialog{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);padding:24px;width:680px;max-height:80vh;overflow:auto}.dialog.gate{width:460px}.dialog.solution{padding:28px;display:flex;flex-direction:column;gap:16px}.btn-quiet.muted-link{color:var(--ink-muted)}.turn{display:flex;gap:12px}.turn .avatar{width:40px;height:40px;flex:none;border-radius:50%;background:var(--accent-surface);display:grid;place-items:center;font-size:20px}.turn .said{flex:1;min-width:0;display:flex;flex-direction:column;gap:4px}.bubble{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:12px 16px;font-size:var(--type-body);line-height:1.25}.bubble.student{background:var(--sunken)}.kriky-text{white-space:normal}.kriky-text p,.kriky-text li,.kriky-text td,.kriky-text th{white-space:pre-line}.kriky-text>*{margin:0}.kriky-text>*+*{margin-top:8px}.kriky-text strong{font-weight:600}.kriky-text .line{display:block;white-space:pre-line}.kriky-text .line[data-marker]:before{content:attr(data-marker) " "}.kriky-text .line[data-marker]+.line[data-marker]{margin-top:4px}.kriky-text h1,.kriky-text h2,.kriky-text h3,.kriky-text h4,.kriky-text h5,.kriky-text h6{font-size:var(--type-body);font-weight:600;line-height:1.5}.kriky-text ul,.kriky-text ol{padding-left:20px}.kriky-text li+li{margin-top:4px}.kriky-text li::marker{color:var(--ink-muted)}.kriky-text table{display:block;max-width:100%;overflow-x:auto;border:1px 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var(--line-strong);padding:9px 13px}.banner.slim{padding:8px 12px;font-size:var(--type-caption)}.warn-strip{margin-top:16px;background:var(--sunken);border:1px solid var(--line-strong);border-radius:var(--radius);padding:8px 12px;font-size:var(--type-caption);line-height:1.25;color:var(--ink)}.warn-strip strong{font-weight:600}.panel-card{background:var(--sunken);border:1px solid var(--line);border-radius:var(--radius);padding:14px;display:flex;flex-direction:column;gap:6px}.panel-card.plain{border-color:transparent}.panel-card.asking{background:var(--surface);border-color:var(--accent)}.panel-cards{flex:1;min-height:0;overflow-y:auto;display:flex;flex-direction:column;gap:12px}.stat{display:flex;gap:10px;font-size:var(--type-caption);color:var(--ink-muted)}.stat .key{flex:none;width:96px}.stat .value{color:var(--ink);font-weight:600}.error{background:var(--answer-incorrect-surface);color:var(--answer-incorrect);border-radius:var(--radius);padding:10px 14px;font-size:var(--type-caption)}.student-sign-in-page{display:flex;align-items:center;justify-content:center;min-height:calc(100vh - 57px);padding:var(--page-pad-y) var(--page-pad-x)}.student-sign-in{display:flex;flex-direction:column;gap:16px;width:420px;padding:28px;border-radius:var(--radius-lg);background:var(--surface);box-shadow:0 12px 32px #1a1f2b29}.student-sign-in h1{margin:0;font-size:var(--type-heading);font-weight:600;line-height:1.5}.student-field{display:flex;flex-direction:column;gap:4px}.student-field>span{color:var(--ink-muted);font-size:var(--type-caption);font-weight:500;line-height:1.5}.student-field input{height:41px;padding:0 11px;border:1px solid var(--line-strong);border-radius:var(--radius);background:var(--surface);color:var(--ink);font-family:inherit;font-size:var(--type-label);line-height:1.5}.student-field input:focus{border-color:var(--accent);outline:none}.student-sign-in .refused{margin:0;color:var(--answer-incorrect);font-size:var(--type-caption);line-height:1.5}.student-sign-in-button{height:41px;border:none;border-radius:var(--radius);background:var(--accent);color:var(--surface);font-family:inherit;font-size:var(--type-label);font-weight:600;line-height:1.5}.student-sign-in-button:disabled{opacity:1;cursor:progress}.student-sign-in .note{margin:0;color:var(--ink-muted);font-size:var(--type-caption);font-weight:500;line-height:1.5}.teacher{--type-display: 24px;--type-heading: 18px;--type-body: 14px;--type-label: 13px;--type-caption: 11px;--card-padding: 16px;--row-gap: 8px;--section-gap: 24px;--rail-w: 260px;--panel-w: 420px;display:flex;width:100%;height:100vh;overflow:hidden;background:var(--paper);font-size:var(--type-body)}.rail{flex:0 0 var(--rail-w);display:flex;flex-direction:column;gap:16px;padding:20px 16px;background:var(--sunken);overflow:hidden}.rail svg{display:block;width:100%;height:100%}.rail .brand{display:flex;align-items:center;gap:8px;height:28px}.rail .brand-mark{width:28px;height:28px;flex:none;border-radius:var(--radius);border:1px solid var(--line);background:var(--surface) url(/kriky-face.png) center / 22px 22px no-repeat}.rail .brand-name{font-size:var(--type-heading);font-weight:600;line-height:1.5}.rail .new-chat{display:flex;align-items:center;gap:8px;height:40px;padding:10px 12px;border:none;border-radius:var(--radius);background:none;color:var(--accent);font-family:inherit;font-size:var(--type-label);font-weight:600;line-height:1.5;text-align:left}.rail .new-chat .plus{font-size:var(--type-caption)}.rail .nav{display:flex;flex-direction:column;gap:4px}.rail .destination{position:relative;display:flex;align-items:center;gap:8px;height:40px;padding:9px 12px;border:none;border-radius:var(--radius-chip);background:none;color:var(--ink-muted);font-family:inherit;font-size:var(--type-label);font-weight:600;line-height:1.5;text-align:left}.rail .destination .icon{width:12px;height:12px;flex:none;color:var(--ink)}.rail .destination .icon{transform:translateY(-1px)}.rail .destination .label{flex:1}@media (hover: hover){.rail .new-chat:hover:not([aria-current]),.rail .destination:hover:not([aria-current]),.rail .conversation:hover:not([aria-current]){background:var(--surface)}}.teacher :focus-visible{outline:2px solid var(--accent);outline-offset:2px}.rail .new-chat[aria-current=page],.rail .destination[aria-current=page]{background:var(--accent-surface);color:var(--accent)}.rail .conversation[aria-current=true]{background:var(--surface);color:var(--ink)}.rail .conversation[aria-current=true]:before{content:"";position:absolute;left:0;top:6px;width:3px;height:28px;border-radius:2px;background:var(--accent)}.rail .lists{flex:1;display:flex;flex-direction:column;min-height:0}.rail .pane{display:flex;flex-direction:column;gap:8px;min-height:0}.rail .pane.history{flex:1}.rail .pane.documents{flex:0 0 225px}.rail .pane.thu{flex:none;gap:0}.rail .pane.history.thu~.pane.documents:not(.thu){flex:1}.rail .pane-head{display:flex;align-items:center;gap:6px;height:27px;padding:5px 0;color:var(--ink);font-size:var(--type-caption);font-weight:600;letter-spacing:.5px;line-height:1.5}.rail .caret{width:8px;height:6px;flex:none;color:var(--ink-muted)}.rail .scroll{flex:1;display:flex;flex-direction:column;gap:4px;min-height:0;overflow-y:auto;scrollbar-width:none;-webkit-mask-image:linear-gradient(to bottom,black calc(100% - 14px),transparent);mask-image:linear-gradient(to bottom,black calc(100% - 14px),transparent)}.rail .scroll::-webkit-scrollbar{display:none}.rail .group{flex:none;padding:0;color:var(--ink-muted);font-size:var(--type-caption);font-weight:600;line-height:1.5}.rail .pane-toggle{flex:1;min-width:0;display:flex;align-items:center;gap:6px;padding:0;border:none;background:none;color:inherit;font:inherit;letter-spacing:inherit;text-align:left;cursor:pointer}.rail .pane-toggle .caret{transition:transform .16s ease}.rail .pane-toggle[aria-expanded=false] .caret{transform:rotate(-90deg)}.rail .pane-head .label{flex:1;min-width:0}.rail .pane-head .upload{flex:none;display:flex;align-items:center;justify-content:center;width:16px;height:16px;padding:0;border:none;background:none;color:var(--ink-muted)}.rail .pane-head .upload svg{width:16px;height:16px}.rail .conversation{flex:none;position:relative;display:flex;align-items:center;width:100%;height:40px;border-radius:var(--radius-chip)}.rail .conversation .open{flex:1;min-width:0;height:100%;padding:10px 4px 10px 12px;border:none;background:none;color:var(--ink);font-family:inherit;font-size:var(--type-label);font-weight:600;line-height:1.5;text-align:left;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.rail .conversation .rename{flex:1;min-width:0;height:28px;margin-left:11px;padding:0 7px;border:1px solid var(--accent);border-radius:var(--radius-chip);background:var(--surface);color:var(--ink);font-family:inherit;font-size:var(--type-label);font-weight:600}.rail .conversation .more{flex:none;visibility:hidden;width:24px;height:24px;margin-right:6px;border:none;border-radius:var(--radius-chip);background:none;color:var(--muted);font-family:inherit;font-size:var(--type-label);line-height:1}.rail .conversation:hover .more,.rail .conversation:focus-within .more,.rail .conversation .more[aria-expanded=true]{visibility:visible}.row-menu{position:fixed;z-index:20;display:flex;flex-direction:column;min-width:114px;padding:3px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);box-shadow:0 6px 18px #0000001f}.row-menu button{padding:6px 8px;font-size:13px;border:none;border-radius:var(--radius-chip);background:none;color:var(--ink);font-family:inherit;text-align:left}@media (hover: hover){.row-menu button:hover{background:var(--sunken)}}.rail .document{flex:none;display:flex;align-items:flex-start;gap:10px;min-height:56px;padding:9px 11px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface)}.rail .document:not(.settled){cursor:default}.rail .document .status{font-size:var(--type-caption);font-weight:600;line-height:1.5}.rail .document.processing .status{color:var(--state-processing)}.rail .document.needs-human .status{color:var(--state-needs-human)}.rail .document .kind{padding:2px 5px;border-radius:var(--radius-chip);background:var(--sunken);color:var(--ink-muted);font-size:9px;font-weight:600;line-height:1.5}.rail .document .about{flex:1;display:flex;flex-direction:column;gap:2px;min-width:0}.rail .document .name{font-size:var(--type-caption);font-weight:600;line-height:1.5;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.rail .document .meta{color:var(--ink-muted);font-size:var(--type-caption);line-height:1.5}.rail .split-handle{display:flex;align-items:center;justify-content:center;height:12px;flex:none;position:relative;cursor:row-resize;touch-action:none}.rail .split-handle:before{content:"";position:absolute;left:0;right:0;height:1px;background:var(--line)}.rail .split-handle .grip{position:relative;width:24px;height:3px;border-radius:2px;background:var(--ink-faint)}.teacher .center{flex:1;min-width:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:20px;padding:32px 40px 24px;background:var(--paper)}.teacher .hero{width:143px;height:240px;object-fit:contain}.teacher .intro{display:flex;flex-direction:column;gap:12px;width:min(820px,100%);text-align:center}.teacher .intro h1{font-size:var(--type-display);font-weight:600;line-height:1.5}.teacher .intro p{margin:0;color:var(--ink-muted);font-size:var(--type-body);line-height:1.5}.teacher .suggestions{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;width:min(820px,100%)}.teacher 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