@charset "UTF-8";
/* Vanilla adaptation of Corn src/index.css + admin responsive.tsx + AdminLayout/AppSidebar. */
:root{--background:#fff;--foreground:#0f172a;--foreground-muted:#52525b;--surface:#fff;--surface-hover:#f4f4f5;--surface-muted:#f4f4f5;--panel:#fff;--line:#e4e4e7;--line-strong:#d4d4d8;--sidebar:#fff;--primary:#2563eb;--primary-foreground:#fff;--info:#2563eb;--success:#16a34a;--warning:#d97706;--destructive:#dc2626;--ring:#2563eb;--shadow-card:0 1px 0 rgb(15 23 42 / .03);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI","Microsoft YaHei",sans-serif;color:var(--foreground);background:var(--background);font-size:14px;font-synthesis:none}
*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.5}a{color:inherit;text-decoration:none}body [hidden]{display:none}h1,h2,h3,p{margin-top:0}h1{font-size:20px;line-height:1.4;margin-bottom:6px}h2{font-size:16px;margin-bottom:8px}h3{font-size:14px;margin-bottom:10px}p{line-height:1.65}small{font-size:12px}button,input,select,textarea,a{outline-offset:3px}:focus-visible{outline:2px solid var(--ring)}.muted,.help,.section-note,.section-heading>.help{color:var(--foreground-muted)}.help,.section-note{font-size:12px;line-height:1.65;margin:8px 0 12px}.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.skip-link{position:fixed;top:-50px;z-index:100;background:var(--panel);padding:10px}.skip-link:focus{top:0}.sidebar{position:fixed;inset:0 auto 0 0;width:224px;display:flex;flex-direction:column;border-right:1px solid var(--line);background:var(--sidebar);padding:16px 12px;z-index:30}.brand{display:flex;align-items:center;gap:10px;font-size:15px;font-weight:650;padding:0 8px 24px}.brand small{display:block;font-size:11px;color:var(--foreground-muted);font-weight:400;margin-top:3px}.brand-mark{width:34px;height:34px;display:grid;place-items:center;border-radius:8px;background:color-mix(in srgb,var(--info) 10%,transparent);color:var(--info);font-size:19px}.nav-label{font-size:11px;color:var(--foreground-muted);padding:12px}.sidebar nav{display:grid;gap:4px}.sidebar nav a{display:flex;align-items:center;gap:12px;border-radius:6px;padding:9px 12px;font-size:13px}.sidebar nav a span{width:16px;text-align:center;color:var(--foreground-muted)}.sidebar nav a:hover{background:var(--surface-hover)}.sidebar nav a[aria-current]{background:var(--surface-hover);font-weight:600}.sidebar-footer{margin-top:auto;padding:12px 8px 0;border-top:1px solid var(--line);font-size:11px;color:var(--foreground-muted)}.sidebar-footer p{margin:10px 0 0}.app-shell{margin-left:224px;min-width:0}.topbar{height:60px;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:0 24px;border-bottom:1px solid var(--line);background:var(--panel);position:sticky;top:0;z-index:20}.breadcrumb,.top-actions{display:flex;align-items:center;gap:12px;font-size:12px;min-width:0}.breadcrumb-root{color:var(--foreground-muted)}.breadcrumb strong{font-weight:500;white-space:nowrap}.top-actions{gap:8px}#nav-toggle{display:none}.mode-banner{padding:10px 24px;font-size:12px;line-height:1.6;color:var(--warning);background:color-mix(in srgb,var(--warning) 7%,var(--surface));border-bottom:1px solid color-mix(in srgb,var(--warning) 22%,var(--line))}.mode-banner.gateway{color:var(--info);background:color-mix(in srgb,var(--info) 7%,var(--surface))}.notice{position:sticky;top:60px;z-index:21;margin:12px 24px;padding:12px 16px;border:1px solid color-mix(in srgb,var(--success) 25%,var(--line));border-radius:8px;background:var(--panel);color:var(--success);white-space:pre-wrap;overflow-wrap:anywhere}.notice.error{color:var(--destructive);border-color:color-mix(in srgb,var(--destructive) 30%,var(--line))}main{padding:24px;max-width:1800px;margin:auto;min-height:calc(100vh - 160px)}.page-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;border-bottom:1px solid var(--line);padding-bottom:14px;margin-bottom:16px}.page-heading p{font-size:13px;margin:4px 0 0}.eyebrow{font-size:11px;color:var(--foreground-muted);display:block;margin-bottom:6px}.metrics{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--line);border-radius:8px;margin-bottom:16px;overflow:hidden}.metrics>div{padding:12px 16px;border-right:1px solid var(--line)}.metrics>div:last-child{border:0}.metrics span{display:block;color:var(--foreground-muted);font-size:12px}.metrics strong{display:block;font-size:22px;line-height:1.3;margin-top:4px;font-variant-numeric:tabular-nums}.toolbar{display:flex;align-items:center;flex-wrap:wrap;gap:12px;border:1px solid var(--line);background:var(--panel);padding:12px;border-radius:10px;margin-bottom:12px}.toolbar .help{margin:0 0 0 auto}.search-field,.filter-field{display:flex;align-items:center;gap:10px;font-size:12px;min-width:0}.search-field input{width:240px}.filter-field select{width:150px}.workspace-grid{display:grid;grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr);gap:16px;margin-top:16px}.workspace-grid:has(#create-card[hidden]){grid-template-columns:1fr}.card{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:18px;box-shadow:var(--shadow-card);min-width:0}.section-heading{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:12px}.section-heading h2,.section-heading h3{margin:0}.section-heading.compact{margin-top:16px}.field{display:flex;flex-direction:column;gap:7px;font-size:12px;font-weight:500;margin-bottom:14px;min-width:0}.field small{font-weight:400;color:var(--foreground-muted)}input:not([type=radio]),select,textarea{width:100%;min-width:0;border:1px solid var(--line-strong);border-radius:6px;padding:8px 10px;background:var(--surface);color:var(--foreground);font-size:13px}textarea{resize:vertical;line-height:1.6}.form-row{display:flex;gap:12px}.form-row>.field{flex:1}.form-row>.grade-field{flex:0 0 120px}.file-field{display:flex;flex-direction:column;gap:10px;margin-bottom:14px;border:1px dashed var(--line-strong);border-radius:8px;background:var(--surface-muted);padding:16px;font-size:12px}.file-field.dragging{border-color:var(--info);background:color-mix(in srgb,var(--info) 8%,var(--surface))}.file-field input{padding:6px;background:var(--panel)}input::file-selector-button{font:inherit;border:1px solid var(--line);background:var(--surface);color:var(--foreground);border-radius:4px;padding:5px 10px;margin-right:8px;cursor:pointer}.file-field strong{font-size:12px;font-weight:500;overflow-wrap:anywhere}.file-field small{color:var(--foreground-muted);line-height:1.6}.button{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:34px;border:1px solid transparent;border-radius:6px;padding:7px 12px;font-size:12px;font-weight:500;line-height:1.5;text-align:center}.button.primary{background:var(--primary);color:var(--primary-foreground)}.button.secondary{border-color:var(--line);background:var(--surface);color:var(--foreground)}.button.ghost{background:transparent;color:var(--foreground-muted)}.button.danger{background:color-mix(in srgb,var(--destructive) 8%,var(--surface));color:var(--destructive);border-color:color-mix(in srgb,var(--destructive) 25%,var(--line))}.button:hover:not(:disabled){filter:brightness(.97)}.button.small{min-height:30px;padding:5px 10px}.button.full{width:100%}.badge{display:inline-flex;align-items:center;width:fit-content;max-width:100%;border:1px solid var(--line);border-radius:999px;background:var(--surface-muted);color:var(--foreground-muted);padding:2px 8px;font-size:11px;line-height:1.6;white-space:nowrap}.badge.success{color:var(--success);background:color-mix(in srgb,var(--success) 8%,var(--surface));border-color:color-mix(in srgb,var(--success) 25%,var(--line))}.badge.warning{color:var(--warning);background:color-mix(in srgb,var(--warning) 8%,var(--surface))}.badge.processing{color:var(--info);background:color-mix(in srgb,var(--info) 8%,var(--surface))}.badge.error{color:var(--destructive);background:color-mix(in srgb,var(--destructive) 8%,var(--surface))}.table-frame{overflow-x:auto;border:1px solid var(--line);border-radius:10px;background:var(--panel)}table{width:100%;min-width:650px;border-collapse:collapse;text-align:left;font-size:12px}th{background:var(--surface-muted);font-size:11px;font-weight:500;color:var(--foreground-muted)}th,td{padding:11px 14px;border-bottom:1px solid var(--line);vertical-align:middle}tbody tr:last-child td{border-bottom:0}tbody tr:hover,tbody tr.selected{background:var(--surface-hover)}td:first-child{max-width:340px;overflow-wrap:anywhere}td small{display:block;color:var(--foreground-muted);font-size:11px;margin-top:4px}td .button{white-space:nowrap}.mobile-cards{display:none}.empty,.empty-state{padding:28px 16px;text-align:center;color:var(--foreground-muted);font-size:13px;border:1px dashed var(--line);border-radius:8px}.assignment-info details{border-bottom:1px solid var(--line);padding:12px 0}.assignment-info summary{font-size:12px;cursor:pointer;color:var(--foreground)}.text-block{font-family:inherit;font-size:12px;line-height:1.7;white-space:pre-wrap;overflow-wrap:anywhere;max-height:320px;overflow:auto;background:var(--surface-muted);border-radius:6px;padding:12px;margin:10px 0}.divider{height:1px;background:var(--line);margin:20px 0}.detail-card{margin-top:16px}.detail-meta,.review-actions,.file-actions{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin-bottom:14px;font-size:12px;color:var(--foreground-muted)}.inline-alert{font-size:12px;border-left:3px solid var(--info);padding:10px 12px;background:var(--surface-muted);overflow-wrap:anywhere}.inline-alert.error{border-color:var(--destructive);color:var(--destructive)}.review-item{padding:16px 0;border-bottom:1px solid var(--line);margin-bottom:14px}.item-header{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}.item-header select{width:auto;max-width:180px}.answer-label{font-size:11px;color:var(--foreground-muted);margin-bottom:4px}.answer-content{font-size:13px;white-space:pre-wrap;overflow-wrap:anywhere}.feedback-summary{margin-top:18px}.original-image{max-width:100%;max-height:650px;object-fit:contain;border:1px solid var(--line);margin:12px 0}.login-layout{max-width:440px;margin:38px auto}.login-card{padding:24px}.role-picker{display:flex;gap:10px;border:0;padding:0;margin:20px 0}.role-picker label{display:flex;align-items:center;gap:8px;flex:1;padding:12px;border:1px solid var(--line);border-radius:8px}.role-picker label:has(input:checked){border-color:var(--info);background:color-mix(in srgb,var(--info) 5%,var(--surface))}.role-picker small{display:block;color:var(--foreground-muted);font-size:10px;margin-top:3px}.demo-hint{border-top:1px solid var(--line);margin-top:20px;padding-top:16px;font-size:12px;color:var(--foreground-muted)}.demo-hint p{margin:8px 0}.help-content{max-width:860px}.help-content h2{margin:24px 0 10px}.help-content p{font-size:13px;color:var(--foreground-muted)}footer{display:flex;justify-content:space-between;gap:10px;padding:16px 24px;border-top:1px solid var(--line);font-size:11px;color:var(--foreground-muted)}
@media(max-width:1100px){.sidebar{width:196px}.app-shell{margin-left:196px}.workspace-grid{grid-template-columns:1fr}.toolbar .help{width:100%;margin:0}}
@media(max-width:767px){.sidebar{display:none;top:56px;width:100%;height:auto;bottom:auto;padding:12px;border-bottom:1px solid var(--line)}.sidebar.open{display:flex}.sidebar .brand,.sidebar-footer,.nav-label{display:none}.sidebar nav{grid-template-columns:repeat(3,1fr);gap:4px}.sidebar nav a{padding:12px 8px;gap:6px;justify-content:center}.app-shell{margin-left:0}.topbar{height:56px;padding:0 12px;gap:8px}#nav-toggle{display:inline-flex}.breadcrumb{gap:8px}.breadcrumb-root{display:none}.top-actions{font-size:11px;gap:6px}.top-actions .badge{font-size:10px}#identity{display:none}main{padding:16px 12px}.mode-banner{padding:10px 12px;font-size:11px}.notice{top:56px;margin:10px 12px}.page-heading{gap:8px}.page-heading h1{font-size:18px}.page-heading p{font-size:12px}.metrics>div{padding:10px 12px}.metrics strong{font-size:20px}.metrics span{font-size:11px}.toolbar{align-items:stretch;gap:10px}.search-field{width:100%;flex-wrap:wrap;gap:6px}.search-field input{width:100%}.filter-field{flex:1;justify-content:space-between}.filter-field select{flex:1;max-width:200px}.table-frame{display:none}.mobile-cards{display:grid;gap:10px}.record-card{border:1px solid var(--line);border-radius:8px;padding:14px;background:var(--panel);min-width:0}.record-card.selected{border-color:var(--info)}.record-card h3{margin:0 0 6px;overflow-wrap:anywhere}.record-card p{font-size:12px;color:var(--foreground-muted);margin:6px 0;overflow-wrap:anywhere}.record-card .card-top{display:flex;gap:8px;align-items:flex-start;justify-content:space-between;margin-bottom:8px}.record-card .button{margin-top:8px;min-height:38px}.card{padding:16px}.form-row>.grade-field{flex-basis:100px}.login-layout{margin:20px auto}.login-card{padding:20px}.button{white-space:normal}.review-actions .button{flex:1;min-height:40px}footer{padding:16px 12px;flex-direction:column}.file-field{padding:12px}.file-actions .button{min-height:38px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto;transition-duration:0s;animation-duration:0s}}