:root{--accent: #e5322d;--accent-dark: #c02420;--bg: #fafafa;--surface: #ffffff;--text: #1a1a1a;--text-muted: #666;--border: #e2e2e2;--shadow: 0 1px 3px rgba(0, 0, 0, .08);--shadow-hover: 0 6px 20px rgba(0, 0, 0, .1);--radius: 12px}@media(prefers-color-scheme:dark){:root{--bg: #121212;--surface: #1d1d1d;--text: #ececec;--text-muted: #9a9a9a;--border: #333;--shadow: 0 1px 3px rgba(0, 0, 0, .4);--shadow-hover: 0 6px 20px rgba(0, 0, 0, .5)}}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.55}#app{min-height:100vh;display:flex;flex-direction:column}a{color:inherit;text-decoration:none}.site-header{display:flex;align-items:center;justify-content:space-between;padding:14px 24px;border-bottom:1px solid 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ease,opacity .12s ease}.thumb-card.dragging{opacity:.4}.thumb-card.drop-target{border-color:var(--accent)}.thumb-card.deleted{opacity:.35}.thumb-card.deleted:after{content:"deleted";position:absolute;top:42%;left:0;right:0;color:var(--accent);font-weight:800;text-transform:uppercase;font-size:13px;letter-spacing:1px}.thumb-card canvas,.thumb-card img{max-width:100%;border:1px solid var(--border);border-radius:4px;background:#fff;transition:transform .15s ease}.thumb-num{font-size:12px;color:var(--text-muted);margin-top:4px}.thumb-actions{display:flex;justify-content:center;gap:4px;margin-top:4px}.toast{position:fixed;bottom:24px;left:50%;transform:translate(-50%) translateY(20px);background:var(--text);color:var(--bg);padding:12px 20px;border-radius:10px;font-size:14.5px;opacity:0;pointer-events:none;transition:opacity .2s ease,transform .2s ease;z-index:100;max-width:min(90vw,480px)}.toast-show{opacity:1;transform:translate(-50%) 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