:root{--ptv-text:#111;--ptv-muted:#666;--ptv-border:#e4e4e4}
.ptv-tool,.ptv-tool *{box-sizing:border-box}
.ptv-tool{width:100%;max-width:980px;margin:0 auto;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ptv-text);overflow:hidden}
.ptv-dropzone{min-height:320px;padding:36px 18px;border:2px dashed #cbd7ef;border-radius:16px;background:#fff;text-align:center;display:flex;flex-direction:column;align-items:center;justify-content:center;cursor:pointer}
.ptv-dropzone.dragover{border-color:#2875d9;background:#f8fbff}
.ptv-upload-icon{display:grid;place-items:center;width:48px;height:48px;border-radius:12px;background:#f1f5fb;font-size:26px}
.ptv-dropzone h2{margin:14px 0 6px;font-size:23px}.ptv-dropzone p{margin:0 0 16px;color:#777;font-size:14px}.ptv-dropzone small{margin-top:12px;color:#999;font-size:12px}
.ptv-button{min-height:44px;border:0;border-radius:9px;padding:11px 20px;background:#2875d9;color:#fff;font-weight:750;cursor:pointer}.ptv-button:disabled{opacity:.45;cursor:not-allowed}.ptv-light{background:#eee;color:#111}.ptv-download{background:#111}
.ptv-workspace{width:100%;margin-top:14px}
.ptv-filebar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px;padding:12px 14px;border:1px solid var(--ptv-border);border-radius:12px;background:#fff}
.ptv-file-info{min-width:0;text-align:left}.ptv-file-info strong{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:14px}.ptv-file-info span{display:block;margin-top:2px;color:#777;font-size:12px}
.ptv-panels{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:14px}
.ptv-panel{min-width:0;border:1px solid var(--ptv-border);border-radius:14px;overflow:hidden;background:#fff}
.ptv-label{padding:11px 13px;border-bottom:1px solid var(--ptv-border);font-size:13px;font-weight:750}
.ptv-preview{width:100%;height:clamp(280px,36vw,420px);padding:12px;display:flex;align-items:center;justify-content:center;overflow:hidden;background:repeating-conic-gradient(#eee 0 25%,#fff 0 50%) 50%/20px 20px}
.ptv-preview img{display:block;max-width:100%;max-height:100%;width:auto;height:auto;object-fit:contain}
.ptv-preview svg{display:block;width:100%;height:100%;max-width:100%;max-height:100%}
.ptv-loading{display:flex;flex-direction:column;align-items:center;gap:8px;text-align:center}.ptv-loading span{width:30px;height:30px;border:3px solid #ddd;border-top-color:#2875d9;border-radius:50%;animation:ptv-spin .8s linear infinite}.ptv-loading strong{font-size:14px}.ptv-loading small{color:#888}.ptv-empty,.ptv-error{padding:20px;text-align:center;color:#777;font-size:14px}
.ptv-bottom{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-top:12px}.ptv-status{min-height:18px;font-size:13px}.ptv-status.busy{color:#666}.ptv-status.done{color:#16804b}.ptv-status.error{color:#b42318}.ptv-info{margin-top:3px;color:#777;font-size:12px}
@keyframes ptv-spin{to{transform:rotate(360deg)}}
@media(max-width:700px){.ptv-dropzone{min-height:240px}.ptv-panels{grid-template-columns:1fr}.ptv-preview{height:min(78vw,340px)}.ptv-filebar{align-items:flex-start}.ptv-filebar .ptv-button{width:auto}.ptv-bottom{display:grid;grid-template-columns:1fr}.ptv-download{width:100%}}
@media(max-width:430px){.ptv-dropzone{padding:28px 12px}.ptv-button{width:100%}.ptv-filebar{display:grid;grid-template-columns:1fr}.ptv-filebar .ptv-button{width:100%}.ptv-preview{height:72vw;min-height:230px}}
@media(prefers-reduced-motion:reduce){.ptv-loading span{animation:none}}