:root{--bg: #0a0a14;--bg-2: #0f0f1f;--surface: rgba(255, 255, 255, .04);--surface-hover: rgba(255, 255, 255, .07);--glass-border: rgba(255, 255, 255, .1);--glass-border-hover: rgba(255, 255, 255, .18);--accent: #e91e8c;--accent-light: #f06292;--accent-glow: rgba(233, 30, 140, .25);--accent-dim: rgba(233, 30, 140, .12);--text: #f0f0f8;--text-muted: rgba(240, 240, 248, .55);--text-faint: rgba(240, 240, 248, .28);--r-xs: 6px;--r-sm: 10px;--r-md: 16px;--r-lg: 24px;--ease: .18s cubic-bezier(.4, 0, .2, 1);--ease-spring: .28s cubic-bezier(.34, 1.56, .64, 1);--panel-gap: 6px;--cell-radius: var(--r-sm)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{color-scheme:dark}body{font-family:system-ui,-apple-system,Segoe UI,sans-serif;background:var(--bg);color:var(--text);min-height:100dvh;line-height:1.5;overflow-x:hidden}#app{min-height:100dvh;display:flex;flex-direction:column}.app-header{display:flex;align-items:center;gap:12px;padding:16px 28px;border-bottom:1px solid var(--glass-border);background:#0a0a14d9;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);position:sticky;top:0;z-index:100}.app-header__icon{width:34px;height:34px;border-radius:var(--r-sm);flex-shrink:0}.app-header__title{font-size:1.2rem;font-weight:700;letter-spacing:-.02em;background:linear-gradient(135deg,var(--text) 40%,var(--accent-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.app-main{flex:1;padding:36px 28px 72px;max-width:880px;margin:0 auto;width:100%}.step-bar{display:flex;align-items:center;margin-bottom:40px}.step-item{display:flex;align-items:center;gap:10px;flex-shrink:0}.step-item:not(:last-child){flex:1}.step-connector{flex:1;height:1px;background:var(--glass-border);margin:0 10px;transition:background var(--ease);min-width:20px}.step-item.done+.step-item .step-connector,.step-connector.done{background:var(--accent)}.step-num{width:28px;height:28px;border-radius:50%;border:2px solid var(--glass-border);display:flex;align-items:center;justify-content:center;font-size:.78rem;font-weight:600;color:var(--text-muted);flex-shrink:0;transition:border-color var(--ease),background var(--ease),color var(--ease),box-shadow var(--ease)}.step-item.active .step-num{border-color:var(--accent);background:var(--accent-dim);color:var(--accent-light);box-shadow:0 0 12px var(--accent-glow)}.step-item.done .step-num{border-color:var(--accent);background:var(--accent);color:#fff}.step-label{font-size:.8rem;color:var(--text-faint);white-space:nowrap;transition:color var(--ease)}.step-item.active .step-label{color:var(--text)}.step-item.done .step-label{color:var(--text-muted)}.section-title{font-size:1rem;font-weight:600;margin-bottom:14px;color:var(--text)}.section-sub{font-size:.85rem;color:var(--text-muted);margin-bottom:18px}.divider{height:1px;background:var(--glass-border);margin:28px 0}.card-grid{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:32px}.card{background:var(--surface);border:1.5px solid var(--glass-border);border-radius:var(--r-md);padding:14px 18px;cursor:pointer;transition:border-color var(--ease),background var(--ease),transform var(--ease-spring),box-shadow var(--ease);display:flex;flex-direction:column;align-items:center;gap:10px;user-select:none;-webkit-user-select:none;min-width:80px}.card:hover{border-color:var(--glass-border-hover);background:var(--surface-hover)}.card.selected{border-color:var(--accent);background:var(--accent-dim);box-shadow:0 0 16px var(--accent-glow);transform:translateY(-1px)}.card__label{font-size:.84rem;font-weight:500;color:var(--text-muted);text-align:center}.card.selected .card__label{color:var(--accent-light)}.ratio-thumb{border:1.5px solid var(--glass-border);border-radius:var(--r-xs);background:var(--bg-2)}.ratio-thumb--16-9{width:64px;height:36px}.ratio-thumb--9-16{width:36px;height:64px}.ratio-thumb--1-1{width:48px;height:48px}.clip-count-num{font-size:2rem;font-weight:700;line-height:1;background:linear-gradient(135deg,var(--text) 40%,var(--text-muted));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.card.selected .clip-count-num{background:linear-gradient(135deg,var(--accent-light),var(--accent));-webkit-background-clip:text;background-clip:text}.layout-thumb{display:grid;gap:2px;background:var(--glass-border);border-radius:var(--r-xs);overflow:hidden;padding:2px}.layout-thumb__cell{background:#ffffff1a;border-radius:2px;min-width:8px;min-height:8px}.card.selected .layout-thumb{background:#e91e8c4d}.card.selected .layout-thumb__cell{background:#e91e8c66}.canvas-wrapper{display:flex;justify-content:center;margin-bottom:24px}.collage-canvas{display:grid;gap:var(--panel-gap);width:100%;max-width:680px}.drop-cell[data-cell=a]{grid-area:a}.drop-cell[data-cell=b]{grid-area:b}.drop-cell[data-cell=c]{grid-area:c}.drop-cell[data-cell=d]{grid-area:d}.drop-cell{position:relative;border:2px dashed var(--glass-border);border-radius:var(--cell-radius);overflow:hidden;background:var(--surface);transition:border-color var(--ease),background var(--ease);min-height:100px}.drop-cell.drag-over{border-color:var(--accent-light);border-style:solid;background:var(--accent-glow)}.drop-cell.has-file{border-style:solid;border-color:var(--accent)}.drop-cell__empty{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;padding:20px 16px;height:100%;text-align:center;min-height:inherit}.drop-cell.has-file .drop-cell__empty{display:none}.drop-cell__icon-wrap{color:var(--text-faint);transition:color var(--ease)}.drop-cell.drag-over .drop-cell__icon-wrap{color:var(--accent-light)}.drop-cell__num{font-size:.8rem;font-weight:600;color:var(--text-muted)}.drop-cell__dim{font-size:.72rem;font-weight:500;color:var(--accent-light);background:var(--accent-dim);border:1px solid rgba(233,30,140,.2);border-radius:4px;padding:2px 8px;font-variant-numeric:tabular-nums}.drop-cell__hint{font-size:.72rem;color:var(--text-faint);line-height:1.5}.drop-cell__btn{margin-top:2px;padding:7px 16px;border-radius:var(--r-xs);background:var(--accent-dim);border:1px solid rgba(233,30,140,.3);color:var(--accent-light);font-size:.78rem;font-weight:600;cursor:pointer;transition:background var(--ease),border-color var(--ease),transform var(--ease-spring)}.drop-cell__btn:hover{background:#e91e8c38;border-color:var(--accent);transform:translateY(-1px)}.drop-cell__input{display:none}.drop-cell__preview{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:none}.drop-cell.has-file .drop-cell__preview{display:block}.drop-cell__actions{position:absolute;top:6px;right:6px;display:none}.drop-cell.has-file .drop-cell__actions{display:flex}.drop-cell__remove{width:26px;height:26px;border-radius:50%;background:#000000a6;border:1px solid rgba(255,255,255,.2);color:#ffffffd9;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:.72rem;transition:background var(--ease),color var(--ease)}.drop-cell__remove:hover{background:#e91e8cbf;color:#fff}.progress-section{margin-bottom:20px;display:none}.progress-section.visible{display:block}.progress-header{display:flex;justify-content:space-between;margin-bottom:8px}.progress-text{font-size:.82rem;color:var(--text-muted)}.progress-pct{font-size:.82rem;color:var(--text-faint);font-variant-numeric:tabular-nums}.progress-bar{height:4px;background:var(--glass-border);border-radius:2px;overflow:hidden}.progress-bar__fill{height:100%;background:linear-gradient(90deg,var(--accent),var(--accent-light));border-radius:2px;transition:width .12s linear;width:0%}.action-bar{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;gap:8px;padding:11px 22px;border-radius:var(--r-sm);font-size:.88rem;font-weight:600;border:1.5px solid transparent;cursor:pointer;transition:background var(--ease),border-color var(--ease),transform var(--ease-spring),box-shadow var(--ease),opacity var(--ease);white-space:nowrap;text-decoration:none;line-height:1;user-select:none;-webkit-user-select:none}.btn svg{flex-shrink:0}.btn-primary{background:var(--accent);color:#fff;border-color:var(--accent)}.btn-primary:hover:not(:disabled){background:var(--accent-light);border-color:var(--accent-light);box-shadow:0 4px 20px var(--accent-glow);transform:translateY(-1px)}.btn-ghost{background:var(--surface);color:var(--text-muted);border-color:var(--glass-border)}.btn-ghost:hover:not(:disabled){background:var(--surface-hover);border-color:var(--glass-border-hover);color:var(--text)}.btn:disabled{opacity:.38;cursor:not-allowed;transform:none!important;box-shadow:none!important}.format-bar{display:flex;align-items:center;gap:8px;margin-left:auto}.format-label{font-size:.8rem;color:var(--text-muted)}.format-toggle{display:flex;border-radius:var(--r-xs);border:1px solid var(--glass-border);overflow:hidden}.format-btn{padding:7px 14px;font-size:.8rem;font-weight:500;background:transparent;border:none;color:var(--text-muted);cursor:pointer;transition:background var(--ease),color var(--ease)}.format-btn.active{background:var(--accent-dim);color:var(--accent-light)}.format-btn:hover:not(.active){background:var(--surface-hover);color:var(--text)}.fps-bar{display:flex;align-items:center;gap:8px}.fps-label{font-size:.8rem;color:var(--text-muted)}.fps-select{background:var(--surface);border:1px solid var(--glass-border);color:var(--text);border-radius:var(--r-xs);padding:6px 10px;font-size:.8rem;cursor:pointer;transition:border-color var(--ease)}.fps-select:hover,.fps-select:focus{border-color:var(--glass-border-hover);outline:none}.download-wrap{margin-top:16px;display:none;align-items:center;gap:12px;padding:14px 18px;background:#e91e8c14;border:1px solid rgba(233,30,140,.25);border-radius:var(--r-md)}.download-wrap.visible{display:flex}.download-wrap__text{font-size:.88rem;color:var(--text-muted)}.toast-container{position:fixed;bottom:24px;left:50%;transform:translate(-50%);z-index:1000;display:flex;flex-direction:column;gap:8px;align-items:center;pointer-events:none}.toast{background:#14050ff0;border:1px solid rgba(233,30,140,.35);color:var(--text);padding:12px 20px;border-radius:var(--r-sm);font-size:.86rem;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);animation:toastIn .2s var(--ease) forwards;max-width:420px;text-align:center}.toast.toast-error{border-color:#ff464666;background:#1e0505f0}@keyframes toastIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.loading-screen{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:20px;min-height:260px}.spinner{width:42px;height:42px;border:3px solid var(--glass-border);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.loading-text{font-size:.88rem;color:var(--text-muted)}.nav-bar{display:flex;align-items:center;gap:10px;margin-bottom:28px}.options-row{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:20px}.app-footer{text-align:center;padding:20px 16px;font-size:.72rem;color:var(--text-muted, #6b7280);border-top:1px solid var(--border, #1e1e2e);margin-top:auto}.app-footer a{color:var(--accent, #7c6af7);text-decoration:none}.app-footer a:hover{text-decoration:underline}.license-overlay{position:fixed;inset:0;background:#000000a6;display:flex;align-items:center;justify-content:center;z-index:1000;padding:16px}.license-popover{position:relative;background:#0f0f1ff7;border:1px solid var(--glass-border);border-radius:var(--r-lg);padding:36px 32px 32px;width:min(400px,100%);box-shadow:0 24px 64px #0009;backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);display:flex;flex-direction:column;gap:14px}.license-popover__close{position:absolute;top:14px;right:14px;background:none;border:none;color:var(--text-muted);font-size:1.25rem;line-height:1;cursor:pointer;padding:4px 8px;border-radius:var(--r-xs);transition:color var(--ease),background var(--ease)}.license-popover__close:hover{color:var(--text);background:var(--surface-hover)}.license-popover__title{font-size:1.1rem;font-weight:700;letter-spacing:-.02em;color:var(--text);margin-bottom:2px}.license-popover__label{font-size:.8rem;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.06em}.license-popover__optional{font-weight:400;text-transform:none;letter-spacing:0;color:var(--text-faint)}.license-popover__input{width:100%;background:var(--surface);border:1px solid var(--glass-border);border-radius:var(--r-sm);padding:10px 14px;font-size:.9rem;color:var(--text);font-family:inherit;transition:border-color var(--ease),box-shadow var(--ease);outline:none}.license-popover__input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}.license-popover__input::placeholder{color:var(--text-faint)}.license-popover__status{font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;padding:6px 0 2px}.license-popover__status--standard{color:var(--text-muted)}.license-popover__status--premium{color:#4ade80}.license-popover__download{margin-top:4px;width:100%;justify-content:center}@media (max-width: 640px){.app-main{padding:20px 14px 48px}.app-header{padding:12px 14px}.step-label{display:none}.card-grid{gap:8px}.action-bar{flex-direction:column;align-items:stretch}.format-bar{margin-left:0}.btn{justify-content:center}.options-row{flex-direction:column;gap:10px}}