.install-button{display:inline-flex;align-items:center;justify-content:center;padding:10px 12px;border-radius:999px;background:#125a52;color:#fff;font-weight:600}.install-button.hidden{display:none}.sidebar-backdrop{display:none;position:fixed;inset:0;background:rgba(12,23,20,.45);z-index:5}.sidebar-backdrop.show{display:block}.mobile-menu{display:none}.body.menu-open{overflow:hidden}@media (max-width: 900px){.sidebar{width:min(82vw,320px);transform:translateX(-100%);transition:transform .2s ease;display:flex}.sidebar.open{transform:translateX(0)}.topbar{margin-left:0;padding:0 16px}.workspace{margin-left:0;padding:16px}.content-grid,.feature-grid,.settings-grid,.report-stats{grid-template-columns:1fr}.feature-side{grid-column:auto}.invoice-dashboard-grid{grid-template-columns:1fr}.summary-actions{display:grid;gap:8px}.mobile-menu{display:inline-flex}.top-actions{gap:8px}.items-table-wrap{overflow-x:auto}.items-table-wrap table{min-width:700px}.field-grid.three,.payment-input-row{grid-template-columns:1fr}}