:root{--bg:#1a1a2e;--bg-secondary:#16213e;--bg-panel:#1f2b47;--text:#e0e0e0;--text-secondary:#a0a0b0;--accent:#4fc3f7;--accent-hover:#29b6f6;--danger:#ef5350;--danger-hover:#f44336;--border:#2a3a5c;--success:#66bb6a}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);min-height:100vh;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}#root{min-height:100vh}.app{flex-direction:column;min-height:100vh;display:flex}.app-header{background:var(--bg-secondary);border-bottom:1px solid var(--border);align-items:center;padding:12px 24px;display:flex}.app-header h1{color:var(--accent);margin:0;font-size:22px;font-weight:600}.app-main{flex:1;grid-template-columns:300px 1fr 320px;gap:0;display:grid;overflow:hidden}.left-column,.center-column,.right-column{border-right:1px solid var(--border);height:calc(100vh - 54px);overflow-y:auto}.right-column{border-right:none}.panel{border-bottom:1px solid var(--border);padding:16px}.panel h2{color:var(--accent);text-transform:uppercase;letter-spacing:1px;margin-bottom:12px;font-size:16px;font-weight:600}.panel h3{color:var(--text);margin-bottom:8px;font-size:14px;font-weight:600}.panel h4{color:var(--text-secondary);margin:8px 0 4px;font-size:13px}.drop-zone{border:2px dashed var(--border);text-align:center;cursor:pointer;border-radius:8px;margin-bottom:12px;padding:24px;transition:all .2s}.drop-zone:hover{border-color:var(--accent);background:#4fc3f70d}.drop-zone p{color:var(--text-secondary);font-size:13px}.slides-grid{grid-template-columns:repeat(2,1fr);gap:8px;display:grid}.slide-thumb{border:2px solid var(--border);cursor:grab;border-radius:6px;transition:border-color .2s;position:relative;overflow:hidden}.slide-thumb:hover{border-color:var(--accent)}.slide-thumb:active{cursor:grabbing}.slide-thumb img{aspect-ratio:16/9;object-fit:cover;width:100%;display:block}.slide-number{color:#fff;background:#000000b3;border-radius:3px;padding:1px 6px;font-size:11px;font-weight:600;position:absolute;top:4px;left:4px}.slide-actions{background:var(--bg-secondary);justify-content:center;gap:2px;padding:4px;display:flex}.slide-actions button{color:var(--text-secondary);cursor:pointer;background:0 0;border:none;border-radius:3px;padding:2px 6px;font-size:11px}.slide-actions button:hover:not(:disabled){color:var(--accent);background:#4fc3f71a}.slide-actions button:disabled{opacity:.3;cursor:default}button{background:var(--bg-panel);border:1px solid var(--border);color:var(--text);cursor:pointer;border-radius:4px;padding:6px 12px;font-size:13px;transition:all .2s}button:hover:not(:disabled){border-color:var(--accent);color:var(--accent)}button:disabled{opacity:.4;cursor:default}.btn-primary{background:var(--accent);color:#000;border-color:var(--accent);font-weight:600}.btn-primary:hover:not(:disabled){background:var(--accent-hover);border-color:var(--accent-hover);color:#000}.btn-danger{color:var(--danger);border-color:var(--danger)}.btn-danger:hover:not(:disabled){background:var(--danger);color:#fff;border-color:var(--danger)}.btn-sm{padding:2px 8px;font-size:12px}.btn-export{width:100%;padding:12px;font-size:16px}.audio-list{flex-direction:column;gap:6px;display:flex}.audio-item{background:var(--bg-secondary);border:1px solid var(--border);border-radius:6px;justify-content:space-between;align-items:center;padding:8px 10px;display:flex}.audio-info{flex-direction:column;gap:2px;min-width:0;display:flex;overflow:hidden}.audio-name{white-space:nowrap;text-overflow:ellipsis;font-size:13px;overflow:hidden}.audio-duration{color:var(--text-secondary);font-size:11px}.audio-actions{flex-shrink:0;gap:4px;display:flex}.audio-actions button{padding:2px 6px;font-size:11px}.audio-total{background:var(--bg-secondary);color:var(--accent);text-align:center;border-radius:4px;margin-top:8px;padding:8px;font-size:13px}.settings-section{border-bottom:1px solid var(--border);margin-bottom:16px;padding-bottom:16px}.settings-section:last-child{border-bottom:none;margin-bottom:0}.setting-row{margin-bottom:6px}.setting-row label{color:var(--text);flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;display:flex}.info-text{color:var(--text-secondary);margin:4px 0;font-size:12px}.auto-duration{color:var(--text-secondary);font-size:12px;font-style:italic}input[type=number],input[type=text],select{background:var(--bg-secondary);border:1px solid var(--border);color:var(--text);border-radius:4px;padding:4px 8px;font-size:13px}input[type=number]:focus,input[type=text]:focus,select:focus{border-color:var(--accent);outline:none}.input-sm{width:60px}.input-md{width:100px}input[type=checkbox]{accent-color:var(--accent)}input[type=color]{border:1px solid var(--border);cursor:pointer;border-radius:4px;width:32px;height:24px;padding:0}.slide-selector{justify-content:center;align-items:center;gap:12px;margin-bottom:12px;display:flex}.slide-selector span{color:var(--text);font-size:14px}.text-editor-header{justify-content:space-between;align-items:center;margin-bottom:12px;display:flex}.text-editor-header h3{margin:0}.text-preview-container{border:1px solid var(--border);background:#000;border-radius:6px;width:100%;margin-bottom:12px;position:relative;overflow:hidden}.text-preview-image{width:100%;display:block}.draggable-text{cursor:move;-webkit-user-select:none;user-select:none;white-space:nowrap;text-shadow:1px 1px 3px #000c;padding:4px;position:absolute}.draggable-text.selected{outline:2px dashed var(--accent);outline-offset:4px}.inline-text-input{color:inherit;font:inherit;text-align:center;text-shadow:inherit;background:0 0;border:none;outline:none;min-width:40px;padding:0}.resize-handle{background:var(--accent);cursor:nwse-resize;border:2px solid #fff;border-radius:2px;width:12px;height:12px;position:absolute;bottom:-6px;right:-6px}.text-controls{background:var(--bg-secondary);border:1px solid var(--border);cursor:pointer;border-radius:6px;margin-bottom:6px;padding:8px;transition:border-color .2s}.text-controls.selected{border-color:var(--accent)}.text-controls-row{flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:6px;display:flex}.text-controls-row:last-child{margin-bottom:0}.text-controls-row label{color:var(--text-secondary);align-items:center;gap:4px;font-size:12px;display:flex}.text-input{flex:1;min-width:0}.preview-panel{padding-bottom:0}.preview-canvas-container{border:1px solid var(--border);background:#000;border-radius:6px;width:100%;margin-bottom:12px;overflow:hidden}.preview-canvas{width:100%;height:auto;display:block}.preview-controls{flex-wrap:wrap;align-items:center;gap:8px;padding:12px 0;display:flex}.time-display{color:var(--text-secondary);font-variant-numeric:tabular-nums;min-width:80px;font-size:13px}.seek-bar{min-width:100px;height:4px;accent-color:var(--accent);cursor:pointer;flex:1}.export-progress{margin-top:12px}.progress-bar{background:var(--bg-secondary);border-radius:4px;width:100%;height:8px;overflow:hidden}.progress-fill{background:var(--accent);border-radius:4px;height:100%;transition:width .3s}.progress-text{color:var(--text-secondary);margin-top:6px;font-size:12px}.per-slide-transitions{margin-top:8px}.slide-durations .setting-row{padding:2px 0}@media (width<=1200px){.app-main{grid-template-columns:1fr}.left-column,.center-column,.right-column{border-right:none;border-bottom:1px solid var(--border);height:auto}}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:var(--bg)}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-secondary)}