:root{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--color-bg-app:#080b10;--color-bg-surface-1:#0c1119;--color-bg-surface-2:#141b26;--color-bg-surface-3:#0f1522;--color-bg-toast:#101623;--color-text-primary:#c8d1e6;--color-text-strong:#e8eeff;--color-text-muted:#8f9ab4;--color-text-active:#0b0d12;--color-border-default:#2a3344;--color-border-subtle:#1f2530;--color-border-hover:#4a5a78;--color-focus:#7aa2ff;--color-active-bg:#7aa2ff;--space-1:4px;--space-2:6px;--space-3:8px;--space-4:10px;--space-5:12px;--space-6:14px;--radius-1:4px;--radius-2:6px;--radius-3:8px;--radius-4:10px;--shadow-panel:0 10px 24px #0000004d;--shadow-toast:0 8px 20px #00000047;--toast-info-bg:var(--color-bg-toast);--toast-info-border:#6e86b4;--toast-info-text:var(--color-text-primary);--toast-success-bg:var(--color-bg-toast);--toast-success-border:#50fa7b;--toast-success-text:var(--color-text-primary);--toast-error-bg:var(--color-bg-toast);--toast-error-border:#ff6b81;--toast-error-text:var(--color-text-primary);font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif}*{box-sizing:border-box}html,body,#app{width:100%;height:100%;margin:0}body{background:var(--color-bg-app);color:var(--color-text-primary)}#app{grid-template-rows:auto 1fr auto;display:grid}.toolbar{gap:var(--space-4) var(--space-6);padding:var(--space-4) var(--space-6);border-bottom:1px solid var(--color-border-subtle);background:var(--color-bg-surface-1);grid-template-columns:auto 1fr auto;align-items:center;display:grid}.toolbar-brand{align-content:center;gap:2px;display:grid}.toolbar h1{letter-spacing:.02em;margin:0;font-size:16px}.toolbar-subtitle,.toolbar-status{color:var(--color-text-muted);margin:0;font-size:13px}.toolbar-controls{align-items:center;gap:var(--space-3) var(--space-4);flex-wrap:wrap;min-width:0;display:flex}.toolbar-meta{justify-items:end;gap:3px;display:grid}.toolbar-help-btn{margin-top:3px;padding:5px 9px;font-size:11px}.toolbar-tools{align-items:center;gap:var(--space-2);flex-wrap:wrap;display:flex}.toolbar-perspective,.toolbar-scene{align-items:center;gap:var(--space-2);padding-left:var(--space-5);border-left:1px solid var(--color-border-subtle);flex-wrap:wrap;display:flex}.perspective-modes{align-items:center;gap:var(--space-2);flex-wrap:wrap;display:flex}.tool-btn{padding:var(--space-2) var(--space-5);font:inherit;letter-spacing:.03em;color:var(--color-text-primary);background:var(--color-bg-surface-2);border:1px solid var(--color-border-default);border-radius:var(--radius-2);cursor:pointer;margin:0;font-size:12px;font-weight:600}.tool-btn:hover{border-color:var(--color-border-hover);color:var(--color-text-strong)}.tool-btn:focus-visible{outline:2px solid var(--color-focus);outline-offset:2px}.tool-btn.is-active{color:var(--color-text-active);background:var(--color-active-bg);border-color:var(--color-active-bg)}.viewport-shell{min-height:0;padding:var(--space-4)}#viewport{border:1px solid var(--color-border-subtle);border-radius:var(--radius-3);touch-action:none;width:100%;height:100%;display:block}.status-bar{gap:var(--space-3);padding:var(--space-3) var(--space-5);border-top:1px solid var(--color-border-subtle);background:var(--color-bg-surface-1);flex-wrap:wrap;align-items:center;display:flex}.status-chip{padding:var(--space-1) var(--space-3);color:var(--color-text-primary);background:var(--color-bg-surface-2);border:1px solid var(--color-border-default);border-radius:var(--radius-2);margin:0;font-size:12px}.status-hint{color:var(--color-text-strong);flex:260px}.shortcut-help-panel{z-index:18;width:min(380px,100vw - 32px);padding:var(--space-4) var(--space-5);background:var(--color-bg-surface-3);border:1px solid var(--color-border-default);border-radius:var(--radius-4);box-shadow:var(--shadow-panel);position:fixed;top:72px;right:16px}.shortcut-help-panel.is-hidden{display:none}.shortcut-help-head{justify-content:space-between;align-items:center;gap:var(--space-3);margin-bottom:var(--space-3);display:flex}.shortcut-help-head h2{margin:0;font-size:14px}.shortcut-help-close{padding:4px 8px}.shortcut-help-list{gap:var(--space-1);color:var(--color-text-primary);margin:0;padding-left:18px;font-size:13px;display:grid}.shortcut-help-list code{color:var(--color-text-strong);background:var(--color-bg-surface-2);border:1px solid var(--color-border-default);border-radius:var(--radius-1);padding:1px 4px}.toast-region{z-index:20;gap:var(--space-3);pointer-events:none;width:min(360px,100vw - 32px);display:grid;position:fixed;bottom:16px;right:16px}.toast{padding:var(--space-4) var(--space-5);color:var(--toast-info-text);background:var(--toast-info-bg);border:1px solid var(--color-border-default);border-left:4px solid var(--toast-info-border);border-radius:var(--radius-3);box-shadow:var(--shadow-toast);margin:0}.toast[data-toast-variant=info]{color:var(--toast-info-text);background:var(--toast-info-bg);border-left-color:var(--toast-info-border)}.toast[data-toast-variant=success]{color:var(--toast-success-text);background:var(--toast-success-bg);border-left-color:var(--toast-success-border)}.toast[data-toast-variant=error]{color:var(--toast-error-text);background:var(--toast-error-bg);border-left-color:var(--toast-error-border)}.toast-title{letter-spacing:.02em;margin:0 0 4px;font-size:12px;display:block}.toast-message{color:inherit;margin:0;font-size:12px}@media (width<=1280px){.toolbar{grid-template-columns:1fr;align-items:start}.toolbar-meta{justify-items:start;gap:4px}.shortcut-help-panel{top:130px}}@media (width<=960px){.toolbar-perspective,.toolbar-scene{border-left:0;padding-left:0}.status-bar{gap:var(--space-2)}}