:root{font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,sans-serif;line-height:1.6;font-weight:400;color:var(--color-text-primary);background-color:var(--color-body-background);font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;color-scheme:light;--color-text-primary: #0f172a;--color-text-muted: #475569;--color-text-subtle: #64748b;--color-text-tertiary: #94a3b8;--color-panel-bg: #ffffff;--color-panel-border: #e2e8f0;--shadow-panel: 0 6px 18px rgba(15, 23, 42, .06);--shadow-toggle: 0 4px 12px rgba(15, 23, 42, .18);--color-input-border: #cbd5f5;--color-input-bg: #f8fafc;--color-filename: #334155;--color-hint: #64748b;--color-secondary-button-bg: #e2e8f0;--color-secondary-button-text: #0f172a;--color-secondary-button-border: #cbd5f5;--color-link: #6366f1;--color-error: #ef4444;--color-preview-border: rgba(99, 102, 241, .2);--color-viewport-bg: #0f172a;--color-viewport-overlay: rgba(15, 23, 42, .45);--color-crosshair-center: rgba(15, 23, 42, .7);--color-gif-border: #e2e8f0;--color-accent: #6366f1;--color-toggle-track: rgba(148, 163, 184, .28);--color-toggle-border: rgba(148, 163, 184, .55);--color-toggle-thumb: #ffffff;--color-toggle-icon: #0f172a;--color-body-background: #f3f4f6;--color-body-gradient-start: #f8fafc;--color-body-gradient-end: #e2e8f0}[data-theme=dark]{color-scheme:dark;--color-text-primary: #f1f5f9;--color-text-muted: #cbd5f5;--color-text-subtle: #94a3b8;--color-text-tertiary: #64748b;--color-panel-bg: #0f172a;--color-panel-border: #1e293b;--shadow-panel: 0 12px 28px rgba(15, 23, 42, .45);--shadow-toggle: 0 6px 18px rgba(15, 23, 42, .6);--color-input-border: #1e293b;--color-input-bg: rgba(30, 41, 59, .75);--color-filename: #e2e8f0;--color-hint: #94a3b8;--color-secondary-button-bg: #1f2937;--color-secondary-button-text: #e2e8f0;--color-secondary-button-border: #334155;--color-link: #a5b4fc;--color-error: #fca5a5;--color-preview-border: rgba(99, 102, 241, .45);--color-viewport-bg: #111827;--color-viewport-overlay: rgba(15, 23, 42, .55);--color-crosshair-center: rgba(15, 23, 42, .85);--color-gif-border: #1f2937;--color-toggle-track: rgba(148, 163, 184, .2);--color-toggle-border: rgba(148, 163, 184, .35);--color-toggle-thumb: #e2e8f0;--color-toggle-icon: #e2e8f0;--color-body-background: #0b1120;--color-body-gradient-start: #0f172a;--color-body-gradient-end: #111827}*,*:before,*:after{box-sizing:border-box}body{margin:0;min-height:100vh;background-color:var(--color-body-background);background-image:linear-gradient(135deg,var(--color-body-gradient-start) 0%,var(--color-body-gradient-end) 100%)}#root{min-height:100vh}a{color:inherit;text-decoration:none}input,button,select{font:inherit}.app-shell{max-width:1200px;margin:0 auto;padding:32px 20px 64px;display:flex;flex-direction:column;gap:24px}.app-header{display:flex;flex-direction:column;gap:8px}.header-top{display:flex;align-items:center;justify-content:space-between;gap:16px}.app-header h1{margin:0 0 4px;font-size:2.4rem;color:var(--color-text-primary)}.app-header p{margin:0;color:var(--color-text-muted)}.theme-toggle{position:relative;width:60px;height:32px;border-radius:999px;border:none;padding:0;background:transparent;cursor:pointer}.theme-toggle:focus-visible{outline:2px solid var(--color-accent);outline-offset:4px}.theme-toggle .toggle-track{position:relative;width:100%;height:100%;border-radius:inherit;background:var(--color-toggle-track);border:1px solid var(--color-toggle-border);transition:background .2s ease,border-color .2s ease}.theme-toggle .toggle-thumb{position:absolute;top:50%;left:4px;width:24px;height:24px;border-radius:999px;background:var(--color-toggle-thumb);transform:translateY(-50%);transition:transform .25s ease;box-shadow:var(--shadow-toggle)}.theme-toggle.is-dark .toggle-thumb{transform:translate(24px,-50%)}.theme-toggle .toggle-icon{position:absolute;top:50%;transform:translateY(-50%);font-size:.85rem;color:var(--color-toggle-icon);opacity:.75;transition:opacity .2s ease}.theme-toggle .toggle-icon.sun{left:10px}.theme-toggle .toggle-icon.moon{right:10px}.theme-toggle.is-dark .toggle-icon.sun{opacity:.4}.theme-toggle:not(.is-dark) .toggle-icon.moon{opacity:.4}.panel{background:var(--color-panel-bg);border:1px solid var(--color-panel-border);border-radius:14px;padding:18px 20px;display:flex;flex-direction:column;gap:12px;box-shadow:var(--shadow-panel)}.panel-header{display:flex;align-items:center;justify-content:space-between;gap:12px}.panel-header h3{margin:0;font-size:1.05rem;font-weight:600;color:var(--color-text-primary)}.panel-body{display:flex;flex-direction:column;gap:12px}.frame-manager{position:sticky;top:16px;z-index:9;width:min(100%,760px);margin:0 auto 16px}.frame-manager .panel-body{padding-top:4px}.frame-manager.is-floating .panel{box-shadow:0 18px 38px 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var(--color-gif-border)}.preview-section{display:flex;flex-direction:column;gap:12px;align-items:center}.wiggle-preview{position:relative;margin:0 auto;width:100%;max-width:720px;border-radius:18px;overflow:hidden;border:2px solid var(--color-preview-border);background:var(--color-viewport-bg);min-height:240px}.wiggle-preview.empty{display:flex;align-items:center;justify-content:center;color:var(--color-text-tertiary);font-size:1rem}.wiggle-frame{position:absolute;top:50%;left:50%;transform-origin:center;will-change:opacity,transform;opacity:0;transition:opacity .18s ease-in-out}.wiggle-frame.visible{opacity:1}@media(max-width:1024px){.viewport-row{flex-direction:column}}@media(max-width:720px){.app-shell{padding:24px 16px 48px}.canvas-toolbar .toolbar-grid{grid-template-columns:repeat(auto-fit,minmax(140px,1fr))}.viewport-canvas{min-height:200px}}