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var(--line);background:var(--surface);border-radius:10px;overflow:hidden}.activity-version-text-hunk+.activity-version-text-hunk{border-top:1px solid var(--line)}.activity-version-text-line{grid-template-columns:2rem minmax(0,1fr);min-height:1.8rem;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,monospace;display:grid}.activity-version-text-line.is-removed{background:color-mix(in srgb, #dc2626 10%, var(--surface))}.activity-version-text-line.is-added{background:color-mix(in srgb, #16a34a 11%, var(--surface))}.activity-version-text-marker{color:var(--muted);-webkit-user-select:none;user-select:none;place-items:start center;padding-top:.25rem;display:grid}.activity-version-text-line code{border-left:1px solid var(--line);white-space:pre-wrap;overflow-wrap:anywhere;padding:.25rem .6rem;display:block}.activity-version-text-line mark{color:inherit;background:#facc1594;border-radius:2px}.activity-version-text-line.is-removed mark{background:#f8af72}.activity-version-text-line.is-added mark{background:#b1e17b}.activity-version-text-gap{border-top:1px dashed var(--line);border-bottom:1px dashed var(--line);color:var(--muted);text-align:center;letter-spacing:.2em;padding:.2rem .75rem}@media (max-width:720px){.workspace-tab-toolbar{flex-direction:column;align-items:stretch}.workspace-tab-trailing,.course-view-selector{width:100%}.course-view-option{flex:0 0 42px}.course-view-option.is-active{flex:auto}.course-view-option-control,.course-view-option-control select{width:100%;min-width:0}.participant-group-heading{gap:4px;padding:10px}.participant-group-toggle{gap:8px}.participant-group-icon{flex-basis:32px;height:32px}.participant-group-panel{padding:12px}.version-comparison-controls,.activity-version-diff-columns{grid-template-columns:1fr}}.icon-button{height:var(--button-height);min-height:var(--button-height);width:var(--button-height);padding:0}.icon-button svg{flex:none}.inline-edit{border-top:1px solid var(--line);background:linear-gradient(#eef4fbdb,#f5f8fce0);gap:12px;padding:14px 12px;display:grid}.inline-panel{border:1px solid var(--line);background:linear-gradient(#eef4fbd1,#ffffffe6);border-radius:8px;padding:16px}.grade-challenge-list{border:1px solid var(--line);box-shadow:var(--shadow-card);border-radius:8px;overflow:hidden}.grade-challenge-filter{flex:none}.grade-challenge-item+.grade-challenge-item{border-top:1px solid var(--line)}.grade-challenge-item>summary{cursor:pointer;grid-template-columns:auto minmax(0,1fr) minmax(120px,auto) auto;align-items:center;gap:12px;padding:16px 18px;list-style:none;display:grid}.grade-challenge-item>summary::-webkit-details-marker{display:none}.grade-challenge-item>summary:before{color:var(--muted);content:"›";font-size:1.3rem;line-height:1;transition:transform .12s}.grade-challenge-item[open]>summary:before{transform:rotate(90deg)}.grade-challenge-item[open]>summary{border-bottom:1px solid var(--line)}.grade-challenge-title{align-items:center;gap:10px;min-width:0;display:flex}.grade-challenge-content{padding:18px}.participant-status{border:1px solid var(--line);text-transform:uppercase;border-radius:999px;justify-self:start;padding:6px 10px;font-size:12px;font-weight:800}.participant-status.is-linked{background:color-mix(in srgb, var(--brand-teal), white 84%);color:var(--accent-strong)}.participant-status.is-pending{background:color-mix(in srgb, var(--brand-gold), white 82%);color:color-mix(in srgb, var(--brand-ink), black 10%)}.participant-status.is-missing{background:color-mix(in srgb, var(--line), white 65%);color:var(--muted)}.participant-status.is-late,.participant-status.is-needs-grading{background:color-mix(in srgb, var(--brand-gold), white 78%);color:color-mix(in srgb, var(--brand-ink), black 10%)}.participant-status.is-graded,.participant-status.is-submitted{background:color-mix(in srgb, var(--brand-teal), white 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minmax(350px,.85fr) 36px;align-items:center;gap:20px;min-height:72px;padding:14px 16px}.course-gradebook-overview .table-head{background:var(--surface-2);min-height:38px;padding-block:10px;font-size:.7rem}.course-gradebook-overview .table-row-gradebook-group-summary{background:var(--surface-2);padding-inline-start:58px}.gradebook-row-metrics{grid-template-columns:minmax(130px,1fr) minmax(95px,.85fr) 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