:root{--bg:#F6F5F1;--surface:#FFFFFF;--surface-2:#FBFAF7;--ink:#1C2230;--ink-soft:#565D6E;--ink-faint:#8A8F9C;--border:#E3E0D6;--border-strong:#CFCBBC;--accent:#1F7A5C;--accent-ink:#FFFFFF;--accent-soft:#E4F1EB;--danger:#B3432B;--danger-soft:#FBEAE5;--focus:#2F5D9F;--shadow:0 1px 2px rgba(28,34,48,0.04), 0 6px 20px rgba(28,34,48,0.06);--radius-s:6px;--radius-m:10px;--radius-l:16px;font-size:16px}html[data-theme="dark"]{--bg:#10131A;--surface:#181C25;--surface-2:#1E232E;--ink:#E9E7DF;--ink-soft:#AEB2C0;--ink-faint:#767C8C;--border:#2B3040;--border-strong:#3A4055;--accent:#3FAE87;--accent-ink:#0B1410;--accent-soft:#163229;--danger:#E17A5D;--danger-soft:#2E1D19;--focus:#6E9BE0;--shadow:0 1px 2px rgba(0,0,0,0.3), 0 8px 24px rgba(0,0,0,0.35)}*{box-sizing:border-box}html,body{height:100%}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe 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ease;white-space:nowrap}.btn:active{transform:translateY(1px)}.btn:disabled{opacity:.45;cursor:not-allowed;transform:none}.btn-primary{background:var(--accent);color:var(--accent-ink)}.btn-primary:hover:not(:disabled){filter:brightness(1.06)}.btn-secondary{background:var(--surface);border-color:var(--border-strong);color:var(--ink)}.btn-secondary:hover:not(:disabled){background:var(--surface-2)}.btn-ghost{background:#fff0;border-color:var(--border);color:var(--ink-soft)}.btn-ghost:hover:not(:disabled){border-color:var(--border-strong);color:var(--ink)}.btn-sm{padding:6px 12px;font-size:.82rem}.btn-block{width:100%}.workspace{display:flex;flex-direction:column;gap:22px}.file-bar{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:16px 20px;flex-wrap:wrap}.file-bar-info{display:flex;align-items:center;gap:12px;min-width:0}.file-icon{width:40px;height:40px;flex-shrink:0;border-radius:var(--radius-s);background:var(--accent-soft);color:var(--accent);display:flex;align-items:center;justify-content:center}.file-name{font-weight:600;font-size:.95rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-sub{font-size:.82rem;color:var(--ink-soft);margin-top:2px}.section-title{font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--ink-faint);margin-bottom:10px}.mode-card{padding:20px}.mode-tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}.mode-tab{padding:9px 14px;border-radius:999px;border:1px solid var(--border);background:var(--surface-2);color:var(--ink-soft);font-size:.86rem;font-weight:600;cursor:pointer;transition:all .15s 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var(--border-strong);display:flex;align-items:center;justify-content:center;color:var(--ink-faint);flex-shrink:0}.action-card{padding:20px;display:flex;flex-direction:column;gap:14px}.action-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.progress-wrap{display:none;flex-direction:column;gap:6px}.progress-wrap.visible{display:flex}.progress-track{height:8px;border-radius:999px;background:var(--border);overflow:hidden}.progress-fill{height:100%;width:0%;background:var(--accent);border-radius:999px;transition:width .2s ease}.progress-label{font-size:.8rem;color:var(--ink-soft)}.error-box{display:none;align-items:flex-start;gap:10px;padding:12px 14px;background:var(--danger-soft);border:1px solid 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var(--border);border-radius:var(--radius-s);background:var(--surface-2)}.result-icon{width:32px;height:32px;flex-shrink:0;border-radius:6px;background:var(--accent-soft);color:var(--accent);display:flex;align-items:center;justify-content:center}.result-meta{flex:1;min-width:0;display:flex;flex-direction:column}.result-name{font-size:.87rem;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.result-sub{font-size:.76rem;color:var(--ink-faint)}.empty-state{text-align:center;padding:30px 10px;color:var(--ink-faint);font-size:.88rem}footer.foot-note{text-align:center;margin-top:36px;font-size:.78rem;color:var(--ink-faint)}@media (max-width:560px){.app-shell{padding:20px 14px 60px}.upload-card{padding:28px 16px}.dropzone{padding:32px 14px}.file-bar{padding:14px}.thumb-grid{grid-template-columns:repeat(auto-fill,minmax(88px,1fr))}}