:root{--bg-base: #0A0A0F;--bg-surface: #131318;--bg-raised: #1C1C24;--bg-floating: #24242E;--bg-hover: #2A2A36;--border-subtle: rgba(255, 255, 255, .06);--border-default: rgba(255, 255, 255, .1);--border-strong: rgba(255, 255, 255, .16);--accent: #6C5CE7;--accent-hover: #7F70F0;--accent-glow: rgba(108, 92, 231, .25);--accent-muted: rgba(108, 92, 231, .12);--success: #00B894;--warning: #FDCB6E;--error: #FF7675;--info: #74B9FF;--text-primary: #F5F5F7;--text-secondary: #A0A0B0;--text-tertiary: #636375;--text-accent: #8B7FF0;--caption-bg: rgba(0, 0, 0, .65);--caption-text: #FFFFFF;--caption-active: #6C5CE7;--caption-shadow: 0 2px 8px rgba(0, 0, 0, .8);--shadow-sm: 0 1px 3px rgba(0, 0, 0, .3);--shadow-md: 0 4px 12px rgba(0, 0, 0, .35);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .4);--shadow-float: 0 12px 40px rgba(0, 0, 0, .5);--glass-bg: rgba(28, 28, 36, .72);--glass-border: rgba(255, 255, 255, .08);--glass-blur: 20px;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px;--radius-full: 9999px;--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-5: 20px;--space-6: 24px;--space-8: 32px;--space-10: 40px;--space-12: 48px;--ease-out: cubic-bezier(.16, 1, .3, 1);--ease-spring: cubic-bezier(.34, 1.56, .64, 1);--duration-fast: .15s;--duration-norm: .2s;--duration-slow: .35s;--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter", sans-serif;--font-mono: "SF Mono", "JetBrains Mono", "Fira Code", "Consolas", monospace;--text-xs: 11px;--text-sm: 13px;--text-base: 15px;--text-lg: 17px;--text-xl: 20px;--text-2xl: 24px;--text-3xl: 32px;--weight-regular: 400;--weight-medium: 500;--weight-semibold: 600;--weight-bold: 700;--leading-tight: 1.25;--leading-normal: 1.5;--leading-relaxed: 1.7}::-webkit-scrollbar{width:4px;height:4px}::-webkit-scrollbar-track{background:var(--border-subtle)}::-webkit-scrollbar-thumb{background:var(--border-default);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--border-strong)}::-moz-selection{background:var(--accent-muted);color:var(--text-primary)}::selection{background:var(--accent-muted);color:var(--text-primary)}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}@keyframes waveform-pulse{0%,to{transform:scaleY(.3);opacity:.6}50%{transform:scaleY(1);opacity:1}}@keyframes fade-in{0%{opacity:0}to{opacity:1}}@keyframes slide-up{0%{transform:translateY(100%)}to{transform:translateY(0)}}@keyframes slide-down{0%{transform:translateY(-100%);opacity:0}to{transform:translateY(0);opacity:1}}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}@keyframes pulse-soft{0%,to{opacity:1}50%{opacity:.5}}@keyframes ripple{to{transform:scale(2.5);opacity:0}}*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{background-color:var(--bg-base);color:var(--text-primary);font-family:var(--font-sans);line-height:var(--leading-normal);overflow-x:hidden;min-height:100vh}#root{min-height:100vh}.app-container{max-width:480px;margin:0 auto;min-height:100vh;background-color:var(--bg-base);position:relative;overflow-x:hidden;box-shadow:var(--shadow-lg);display:flex;flex-direction:column}.glass-panel{background:var(--glass-bg);backdrop-filter:blur(var(--glass-blur));-webkit-backdrop-filter:blur(var(--glass-blur));border:1px solid var(--glass-border)}.fade-in{animation:fade-in var(--duration-norm) var(--ease-out)}.slide-up{animation:slide-up var(--duration-slow) var(--ease-out)}.ripple{position:relative;overflow:hidden}.ripple:after{content:"";position:absolute;border-radius:50%;transform:scale(0);animation:ripple .6s var(--ease-out);background:#ffffff4d}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);font-family:inherit;font-size:var(--text-base);font-weight:var(--weight-medium);border:none;cursor:pointer;transition:all var(--duration-fast) var(--ease-out);-webkit-user-select:none;-moz-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent;outline:none}.btn-primary{background:var(--accent);color:#fff;border-radius:var(--radius-md);padding:12px 24px}.btn-primary:hover{background:var(--accent-hover);box-shadow:0 0 0 3px var(--accent-glow)}.btn-primary:active{transform:scale(.97)}.btn-primary:disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none}.btn-secondary{background:transparent;color:var(--text-primary);border:1px solid var(--border-default);border-radius:var(--radius-md);padding:12px 24px}.btn-secondary:hover{background:var(--bg-hover);border-color:var(--border-strong)}.btn-secondary:active{transform:scale(.97)}.btn-ghost{background:transparent;color:var(--text-secondary);border:none;border-radius:var(--radius-md);padding:8px 16px}.btn-ghost:hover{color:var(--text-primary);background:var(--bg-hover)}.btn-icon{width:40px;height:40px;background:transparent;border:none;border-radius:var(--radius-md);color:var(--text-secondary);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all var(--duration-fast) var(--ease-out)}.btn-icon:hover{background:var(--bg-hover);color:var(--text-primary)}.btn-icon:active{transform:scale(.92)}.input{background:var(--bg-raised);border:1px solid var(--border-default);border-radius:var(--radius-md);padding:12px 16px;color:var(--text-primary);font-family:inherit;font-size:var(--text-base);transition:all var(--duration-fast) var(--ease-out)}.input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-muted);outline:none}.input::-moz-placeholder{color:var(--text-tertiary)}.input::placeholder{color:var(--text-tertiary)}.input.error{border-color:var(--error)}.card{background:var(--bg-raised);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:var(--space-5);transition:all var(--duration-fast) var(--ease-out)}.card:hover{border-color:var(--border-default);box-shadow:var(--shadow-md)}.navbar{height:56px;position:sticky;top:0;z-index:100;display:flex;align-items:center;justify-content:space-between;padding:0 var(--space-4);background:var(--glass-bg);backdrop-filter:blur(var(--glass-blur));-webkit-backdrop-filter:blur(var(--glass-blur));border-bottom:1px solid var(--glass-border)}.navbar-left{display:flex;align-items:center;gap:var(--space-3)}.navbar-logo{width:24px;height:24px;border-radius:var(--radius-full);background:linear-gradient(135deg,var(--accent),var(--accent-hover));display:flex;align-items:center;justify-content:center;color:#fff;font-size:14px;font-weight:var(--weight-bold);flex-shrink:0}.navbar-title{font-size:var(--text-base);color:var(--text-primary);font-weight:var(--weight-medium);max-width:200px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;cursor:pointer;padding:4px 8px;border-radius:var(--radius-sm);transition:background var(--duration-fast) var(--ease-out)}.navbar-title:hover{background:var(--bg-hover)}.navbar-title-input{background:var(--bg-raised);border:1px solid var(--accent);border-radius:var(--radius-sm);padding:4px 8px;color:var(--text-primary);font-size:var(--text-base);font-family:inherit;outline:none;width:180px}.navbar-right{display:flex;align-items:center;gap:var(--space-2)}.bottom-nav{position:fixed;bottom:0;left:50%;transform:translate(-50%);width:100%;max-width:480px;height:64px;display:flex;align-items:center;justify-content:space-around;background:var(--glass-bg);backdrop-filter:blur(var(--glass-blur));-webkit-backdrop-filter:blur(var(--glass-blur));border-top:1px solid var(--glass-border);z-index:100;padding-bottom:env(safe-area-inset-bottom)}.nav-item{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;min-width:44px;min-height:44px;background:none;border:none;cursor:pointer;color:var(--text-tertiary);transition:all var(--duration-norm) var(--ease-out);padding:8px 16px;border-radius:var(--radius-md);outline:none}.nav-item.active{color:var(--accent)}.nav-item.active .nav-icon-wrapper{background:var(--accent-muted);border-radius:var(--radius-full);padding:6px 12px}.nav-icon-wrapper{display:flex;align-items:center;justify-content:center;transition:all var(--duration-norm) var(--ease-out)}.nav-label{font-size:var(--text-xs);font-weight:var(--weight-medium)}.nav-item:active{transform:scale(.92)}.upload-zone{border:2px dashed var(--border-default);border-radius:var(--radius-xl);height:240px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--space-3);margin:var(--space-6);cursor:pointer;transition:all var(--duration-norm) var(--ease-out);position:relative;overflow:hidden;background:var(--bg-surface)}.upload-zone:hover,.upload-zone.dragover{border-color:var(--accent);background:var(--accent-muted);transform:scale(1.02)}.upload-zone.error{border-color:var(--error)}.upload-zone-icon{color:var(--text-tertiary);transition:color var(--duration-norm) var(--ease-out)}.upload-zone:hover .upload-zone-icon,.upload-zone.dragover .upload-zone-icon{color:var(--accent)}.upload-zone-text{font-size:var(--text-lg);color:var(--text-secondary);font-weight:var(--weight-medium)}.upload-zone-subtext{font-size:var(--text-sm);color:var(--text-tertiary)}.upload-progress{position:absolute;bottom:0;left:0;height:3px;background:var(--accent);transition:width var(--duration-norm) var(--ease-out);border-radius:0}.upload-progress-text{font-size:var(--text-sm);color:var(--text-secondary);font-family:var(--font-mono)}.canvas-container{position:relative;width:100%;background:var(--bg-base);display:flex;align-items:center;justify-content:center;overflow:hidden;min-height:280px;max-height:420px;aspect-ratio:16 / 9;-webkit-user-select:none;-moz-user-select:none;user-select:none}.canvas-container.aspect-9-16{aspect-ratio:9 / 16;max-height:440px}.canvas-container.aspect-1-1{aspect-ratio:1 / 1;max-height:380px}.aspect-selector-bar{position:absolute;top:8px;right:8px;display:flex;gap:4px;background:#0a0a0fbf;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:4px;border-radius:var(--radius-full);z-index:10;border:1px solid var(--border-subtle)}.aspect-btn{background:none;border:none;color:var(--text-tertiary);font-size:var(--text-xs);font-weight:var(--weight-medium);padding:4px 10px;border-radius:var(--radius-full);cursor:pointer;transition:all var(--duration-fast) var(--ease-out)}.aspect-btn.active{background:var(--accent);color:#fff}.canvas-container video{width:100%;height:100%;-o-object-fit:contain;object-fit:contain;display:block}.preview-canvas{width:100%;height:100%;-o-object-fit:contain;object-fit:contain;touch-action:none}.playback-controls{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;padding:var(--space-4);transition:opacity var(--duration-norm) var(--ease-out);background:linear-gradient(180deg,transparent 60%,rgba(0,0,0,.7) 100%);pointer-events:none}.playback-controls *{pointer-events:auto}.playback-controls.hidden{opacity:0;pointer-events:none}.play-button{width:56px;height:56px;border-radius:var(--radius-full);background:var(--glass-bg);backdrop-filter:blur(var(--glass-blur));-webkit-backdrop-filter:blur(var(--glass-blur));display:flex;align-items:center;justify-content:center;color:var(--accent);cursor:pointer;border:1px solid var(--glass-border);position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);transition:all var(--duration-fast) var(--ease-out)}.play-button:hover{background:var(--bg-hover);box-shadow:0 0 0 3px var(--accent-glow)}.play-button:active{transform:translate(-50%,-50%) scale(.92)}.scrub-bar-container{width:100%;display:flex;align-items:center;gap:var(--space-3);padding:0 var(--space-2)}.scrub-bar{flex:1;height:4px;background:var(--border-default);border-radius:var(--radius-full);position:relative;cursor:pointer;overflow:visible}.scrub-bar-fill{height:100%;background:var(--accent);border-radius:var(--radius-full);transition:width .1s linear}.scrub-bar-thumb{position:absolute;width:12px;height:12px;background:var(--accent);border-radius:var(--radius-full);top:50%;transform:translate(-50%,-50%);box-shadow:var(--shadow-sm);transition:left .1s linear}.time-display{font-family:var(--font-mono);font-size:var(--text-sm);color:var(--text-secondary);min-width:80px;text-align:center}.caption-overlay{position:absolute;left:50%;transform:translate(-50%);max-width:85%;text-align:center;pointer-events:none;line-height:var(--leading-tight);text-shadow:var(--caption-shadow);z-index:5}.caption-word{display:inline-block;margin:0 3px;transition:all var(--duration-fast) var(--ease-out);opacity:.6}.caption-word.spoken{opacity:1}.caption-word.active{color:#fff;border-radius:var(--radius-sm);padding:2px 6px;opacity:1;transform:scale(1.12)}.display-mode-bar{display:flex;gap:6px;margin-top:4px;background:var(--bg-raised);padding:4px;border-radius:var(--radius-md);border:1px solid var(--border-subtle)}.display-mode-pill{flex:1;background:none;border:none;color:var(--text-tertiary);font-size:11px;font-weight:var(--weight-medium);padding:6px 4px;border-radius:var(--radius-sm);cursor:pointer;transition:all var(--duration-fast) var(--ease-out);text-align:center}.display-mode-pill.active{background:var(--accent);color:#fff;box-shadow:0 2px 6px var(--accent-glow)}.editor-panel-card{background:var(--bg-surface);border-top:1px solid var(--border-subtle);display:flex;flex-direction:column}.editor-tabs-bar{display:flex;border-bottom:1px solid var(--border-subtle);background:var(--bg-raised);overflow-x:auto}.editor-tab-btn{flex:1;min-width:90px;padding:10px 8px;background:none;border:none;border-bottom:2px solid transparent;color:var(--text-tertiary);font-size:var(--text-xs);font-weight:var(--weight-medium);display:flex;align-items:center;justify-content:center;gap:6px;cursor:pointer;transition:all var(--duration-fast) var(--ease-out)}.editor-tab-btn.active{color:var(--accent);border-bottom-color:var(--accent);background:var(--bg-surface)}.editor-tab-content{padding:var(--space-4);max-height:220px;overflow-y:auto}.presets-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:var(--space-3)}.preset-card{background:var(--bg-raised);border:1px solid var(--border-subtle);border-radius:var(--radius-md);overflow:hidden;cursor:pointer;transition:all var(--duration-fast) var(--ease-out)}.preset-card:hover,.preset-card.selected{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-muted)}.preset-preview-box{height:48px;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:14px}.preset-card-footer{padding:6px 8px;display:flex;justify-content:space-between;align-items:center;background:var(--bg-surface);border-top:1px solid var(--border-subtle)}.preset-name{font-size:var(--text-xs);font-weight:var(--weight-medium);color:var(--text-primary)}.preset-category{font-size:9px;color:var(--text-tertiary);text-transform:uppercase}.style-controls-list{display:flex;flex-direction:column;gap:var(--space-3)}.control-row{display:flex;flex-direction:column;gap:4px}.control-row label{font-size:var(--text-xs);color:var(--text-secondary);font-weight:var(--weight-medium)}.control-row input[type=range]{accent-color:var(--accent);height:4px;cursor:pointer}.color-pickers-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--space-3);margin-top:4px}.picker-item{display:flex;align-items:center;justify-content:space-between;background:var(--bg-raised);padding:6px 10px;border-radius:var(--radius-sm);border:1px solid var(--border-subtle)}.picker-item label{font-size:var(--text-xs);color:var(--text-secondary)}.picker-item input[type=color]{width:24px;height:24px;border:none;border-radius:var(--radius-sm);cursor:pointer;background:none}.fonts-picker-list{display:flex;flex-direction:column;gap:4px}.font-row-item{display:flex;align-items:center;justify-content:space-between;padding:8px 12px;border-radius:var(--radius-sm);background:var(--bg-raised);border:1px solid var(--border-subtle);cursor:pointer;transition:all var(--duration-fast) var(--ease-out)}.font-row-item:hover,.font-row-item.selected{border-color:var(--accent);background:var(--bg-hover)}.animations-picker-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:var(--space-2)}.anim-card-item{background:var(--bg-raised);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);padding:8px;cursor:pointer;transition:all var(--duration-fast) var(--ease-out)}.anim-card-item:hover,.anim-card-item.selected{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-muted)}.anim-title{font-size:var(--text-xs);font-weight:var(--weight-medium);color:var(--text-primary)}.anim-desc{font-size:10px;color:var(--text-tertiary);margin-top:2px}.capcut-timeline-container{background:var(--bg-surface);border-top:1px solid var(--border-subtle);display:flex;flex-direction:column;margin-bottom:80px;padding-bottom:12px}.timeline-toolbar{display:flex;justify-content:space-between;align-items:center;padding:6px 12px;background:var(--bg-raised);border-bottom:1px solid var(--border-subtle)}.toolbar-left,.toolbar-right{display:flex;align-items:center;gap:8px}.btn-timeline-tool{background:var(--bg-surface);border:1px solid var(--border-default);color:var(--text-secondary);border-radius:var(--radius-sm);padding:4px 10px;font-size:var(--text-xs);font-weight:var(--weight-medium);display:flex;align-items:center;gap:4px;cursor:pointer;transition:all var(--duration-fast) var(--ease-out)}.btn-timeline-tool:hover{color:var(--text-primary);border-color:var(--accent)}.time-ruler{display:flex;height:20px;background:var(--bg-base);border-bottom:1px solid var(--border-subtle);position:relative;overflow:hidden}.ruler-tick{flex:1;min-width:60px;border-left:1px solid var(--border-subtle);padding-left:4px;font-size:9px;font-family:var(--font-mono);color:var(--text-tertiary)}.timeline{display:flex;gap:var(--space-2);height:80px;overflow-x:auto;overflow-y:hidden;background:var(--bg-surface);padding:var(--space-3);position:relative}.timeline-segment{flex-shrink:0;min-width:120px;background:var(--bg-raised);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:var(--space-3);cursor:pointer;transition:all var(--duration-fast) var(--ease-out);display:flex;flex-direction:column;justify-content:space-between}.timeline-segment:hover{border-color:var(--border-default);background:var(--bg-hover)}.timeline-segment.active{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-muted)}.timeline-segment-text{font-size:var(--text-sm);color:var(--text-secondary);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;line-height:var(--leading-tight)}.timeline-segment-footer{display:flex;justify-content:space-between;align-items:center}.timeline-segment-time{font-family:var(--font-mono);font-size:var(--text-xs);color:var(--text-tertiary)}.timeline-position{position:absolute;width:2px;height:80px;background:var(--accent);box-shadow:0 0 8px var(--accent-glow);pointer-events:none;transition:left .1s linear;top:0;z-index:15}.btn-danger:hover{color:var(--error)}.export-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);z-index:200;animation:fade-in var(--duration-norm) var(--ease-out)}.export-sheet{position:fixed;bottom:0;left:50%;transform:translate(-50%);width:100%;max-width:480px;background:var(--bg-floating);border-radius:var(--radius-xl) var(--radius-xl) 0 0;padding:var(--space-6);z-index:201;animation:slide-up var(--duration-slow) var(--ease-out);box-shadow:var(--shadow-float)}.export-handle{width:36px;height:4px;background:var(--border-strong);border-radius:var(--radius-full);margin:0 auto var(--space-4)}.export-title{font-size:var(--text-xl);color:var(--text-primary);font-weight:var(--weight-semibold);margin-bottom:var(--space-4)}.export-row{display:flex;align-items:center;gap:var(--space-4);padding:var(--space-3) var(--space-4);border-radius:var(--radius-md);cursor:pointer;transition:all var(--duration-fast) var(--ease-out);position:relative;overflow:hidden}.export-row:hover{background:var(--bg-hover)}.export-row:active{transform:scale(.98)}.export-row-icon{color:var(--text-secondary);flex-shrink:0}.export-row-content{flex:1;display:flex;flex-direction:column;gap:2px}.export-row-title{font-size:var(--text-base);color:var(--text-primary);font-weight:var(--weight-medium)}.export-row-desc{font-size:var(--text-sm);color:var(--text-tertiary)}.export-row-chevron{color:var(--text-tertiary);flex-shrink:0}.export-close{position:absolute;top:var(--space-4);right:var(--space-4)}.export-settings-card{background:var(--bg-raised);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:var(--space-3) var(--space-4);margin-bottom:var(--space-4);display:flex;flex-direction:column;gap:var(--space-3)}.settings-row{display:flex;flex-direction:column;gap:4px}.settings-label{font-size:var(--text-xs);color:var(--text-secondary);font-weight:var(--weight-medium)}.pill-group{display:flex;gap:6px;align-items:center}.export-pill{background:var(--bg-surface);border:1px solid var(--border-subtle);color:var(--text-tertiary);font-size:var(--text-xs);font-weight:var(--weight-medium);padding:4px 10px;border-radius:var(--radius-full);cursor:pointer;transition:all var(--duration-fast) var(--ease-out)}.export-pill.active{background:var(--accent);color:#fff;border-color:var(--accent);box-shadow:0 0 8px var(--accent-glow)}.bitrate-badge{font-size:10px;font-family:var(--font-mono);color:#00cec9;background:#00cec926;border:1px solid rgba(0,206,201,.3);padding:2px 8px;border-radius:var(--radius-full)}