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var(--border)}.tag.teacher{background:var(--accent-dim);color:var(--accent);border-color:var(--accent-border)}.back-link{display:inline-flex;align-items:center;gap:6px;color:var(--text-soft);text-decoration:none;font-size:13px}.back-link:hover{color:var(--accent)}.class-head{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}.class-head h2{margin:0;font-size:17px}.class-code{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;color:var(--text-soft);margin-left:12px}.class-code code{font-family:var(--font-mono);color:var(--accent);background:var(--bg);border:1px solid var(--border);border-radius:6px;padding:2px 8px}.assign-row{display:flex;gap:8px}.assign-row .text-input{min-width:180px}.progress-scroll{overflow-x:auto}.progress-table{width:100%;border-collapse:collapse;font-size:12.5px}.progress-table td,.progress-table th{text-align:left;padding:9px 10px;border-bottom:1px solid var(--border);white-space:nowrap}.progress-table 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