:root{color-scheme:light;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5;color:#1a2b3c;background:#f8fafc;--control-height: 44px}*{box-sizing:border-box}body{margin:0;min-height:100vh}a{color:#2563eb}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}#app{max-width:720px;margin:0 auto;padding:24px 20px 48px}header.app-header{display:grid;grid-template-columns:40px 1fr auto;align-items:center;gap:12px;margin-bottom:24px}header.app-header-form{grid-template-columns:40px 1fr auto}.header-title{margin:0;font-size:1.35rem;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.header-leading,.header-trailing{min-width:40px}.header-trailing{justify-self:end}.back-button{width:36px;height:36px;border-radius:50%;border:1px solid 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#cbd5e1;border-radius:8px;background:#fff}input{height:var(--control-height)}textarea{min-height:120px;resize:vertical}.row-2{display:grid;grid-template-columns:1fr 1fr;gap:12px}.row-3{display:grid;grid-template-columns:2fr 1fr 1fr;gap:12px}@media(max-width:640px){.row-2,.row-3{grid-template-columns:1fr}}.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px}.actions-end{justify-content:flex-end}button,.button-link{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:none;border-radius:10px;padding:10px 16px;font:inherit;font-weight:600;cursor:pointer}button.primary{background:#2563eb;color:#fff}button.secondary{background:#e2e8f0;color:#1a2b3c}button.ghost{background:transparent;color:#475569;padding-left:0;padding-right:0}button:disabled{opacity:.6;cursor:not-allowed}.school-list{list-style:none;padding:0;margin:0}.school-list li{border-top:1px solid #e2e8f0}.school-list li:first-child{border-top:none}.school-tile{width:100%;display:flex;align-items:center;gap:12px;text-align:left;background:transparent;padding:14px 0;border-radius:0;font:inherit;color:inherit}.school-tile-body{flex:1;min-width:0}.school-tile-title{display:block;font-weight:600}.school-tile-chevron{flex-shrink:0;color:#94a3b8;font-size:1.5rem;line-height:1;padding-right:2px}.school-list .meta{display:block;font-size:.85rem;font-weight:400;color:#64748b;margin-top:4px}.badge{display:inline-block;font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.04em;padding:2px 8px;border-radius:999px;margin-right:6px}.badge.live{background:#dcfce7;color:#166534}.badge.draft{background:#fef3c7;color:#92400e}.code-box{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:1.1rem;letter-spacing:.15em;padding:0 16px;background:#f1f5f9;border-radius:8px;border:1px solid #cbd5e1}.invite-grid{display:flex;flex-direction:column;gap:6px}.invite-labels{display:flex;gap:12px;align-items:flex-end}.invite-labels .field-label:first-child{flex:0 0 112px}.invite-labels .field-label:nth-child(2){flex:1 1 auto;min-width:0}.invite-label-spacer{flex:0 0 auto;width:108px}.invite-labels .field-label{margin-bottom:0}.invite-controls{display:flex;gap:12px;align-items:center}.invite-code-box{flex:0 0 112px;height:var(--control-height);display:flex;align-items:center;justify-content:center;padding:0 10px;font-size:1rem}.invite-controls input{flex:1 1 auto;min-width:0}.invite-send-btn{flex:0 0 auto;height:var(--control-height);white-space:nowrap;padding-left:14px;padding-right:14px}.subsection-title{margin:16px 0 10px;font-size:.95rem;font-weight:700;color:#334155}.subsection-title:first-of-type{margin-top:0}.instructor-list{list-style:none;padding:0;margin:0}.instructor-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 0;border-top:1px solid #e2e8f0}.instructor-list li:first-child{border-top:none;padding-top:0}.instructor-info{display:flex;align-items:center;gap:8px;min-width:0}.instructor-name{font-weight:600}.badge.owner{background:#e0e7ff;color:#3730a3;text-transform:none;letter-spacing:0;font-size:.72rem}.instructor-remove{flex-shrink:0;padding:8px 12px}.instructor-empty{margin:0 0 4px}@media(max-width:480px){.invite-labels,.invite-label-spacer{display:none}.invite-controls{flex-direction:column;align-items:stretch}.invite-code-box{flex:none;width:100%}.invite-send-btn{width:100%}}.inline-success{color:#166534}.inline-error{color:#b91c1c}.auth-actions{flex-direction:column;align-items:stretch}.oauth-button{display:flex;align-items:center;justify-content:center;gap:12px;width:100%;min-height:40px;padding:10px 12px;border-radius:20px;border:1px solid #747775;background:#fff;color:#1f1f1f;font-weight:500;font-size:14px}.oauth-button:hover{background:#f8f9fa}.oauth-button-disabled{opacity:.55;cursor:not-allowed}.oauth-logo{display:block;flex-shrink:0}.divider-label{text-align:center;margin:18px 0 12px}.hint{font-size:.85rem;color:#64748b;margin-top:6px}