:root{--font-sans:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", 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svg{flex-shrink:0;width:16px;height:16px}.auth-footer{text-align:center;color:var(--erp-text-muted);margin-top:1.25rem;font-size:.8125rem}.auth-footer-btn{color:var(--erp-primary);text-underline-offset:2px;cursor:pointer;margin-left:.35rem;font-weight:600;text-decoration:underline}.auth-footer-btn:hover{color:var(--erp-primary-hover)}.erp-auth-footer-tag{text-align:center;color:var(--erp-text-muted);margin-top:1.75rem;font-size:.75rem}.erp-app-shell{background-color:var(--erp-bg);height:100dvh;color:var(--erp-text-main);flex-direction:column;display:flex;overflow:hidden}.erp-header{background:var(--erp-surface);border-bottom:1px solid var(--erp-border);z-index:50;justify-content:space-between;align-items:center;height:64px;padding:0 1.5rem;display:flex;position:sticky;top:0;box-shadow:0 1px 2px 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var(--erp-border-strong);background:#0f172a;width:100%;position:relative;overflow:hidden}.erp-camera-stream{object-fit:cover;width:100%;height:100%}.recognition-overlay{pointer-events:none;z-index:5;width:100%;height:100%;position:absolute;top:0;left:0}.erp-camera-footer{color:var(--erp-text-muted);text-align:center;margin-top:.5rem;font-size:.75rem}.erp-subtle-present-callout{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);color:#86efac;border-radius:var(--erp-radius-sm);text-align:center;background:#0f172ae0;border:1px solid #86efac66;padding:.55rem .85rem;font-size:.875rem;font-weight:600;position:absolute;bottom:12px;left:12px;right:12px;box-shadow:0 4px 12px #0000004d}.erp-students-present-pane{border:1px solid var(--erp-border);border-radius:var(--erp-radius-md);background:#fff;flex-direction:column;padding:1.25rem;display:flex}.erp-roster-header{border-bottom:1px solid 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