:root{--bg:#ffffff;--fg:#1a1a1a;--muted:#5a5a5a;--border:#e2e2e2;--surface:#f7f7f8;--accent:#2563eb;--error:#b91c1c;--max:820px}@media (prefers-color-scheme:dark){:root{--bg:#0e0e10;--fg:#e8e8ea;--muted:#9a9aa2;--border:#2a2a30;--surface:#1a1a1e;--accent:#60a5fa;--error:#f87171}}*{box-sizing:border-box}html{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.6}body{margin:0;background:var(--bg);color:var(--fg)}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.site-header{border-bottom:1px solid var(--border);padding:.75rem 1rem}.brand{font-weight:700;font-size:1.15rem;color:var(--fg)}.site-main{max-width:var(--max);margin:0 auto;padding:1.5rem 1rem 3rem}.site-footer{border-top:1px solid var(--border);color:var(--muted);font-size:.85rem;text-align:center;padding:1.5rem 1rem}h1{font-size:1.9rem;margin:0 0 .25rem}h2{font-size:1.25rem;margin:2rem 0 .5rem}.lede,.tool-tagline{color:var(--muted);margin-top:0}.breadcrumbs{font-size:.85rem;color:var(--muted);margin-bottom:.75rem}.tool-list{list-style:none;padding:0}.tool-list li{padding:.6rem 0;border-bottom:1px solid var(--border)}.tool-list li a{font-weight:600}.tool-list-desc{display:block;color:var(--muted);font-size:.9rem}.tool-controls{display:flex;align-items:center;justify-content:space-between;gap:1rem;margin-bottom:.5rem}select{background:var(--surface);color:var(--fg);border:1px solid var(--border);border-radius:6px;padding:.3rem .5rem}.tool-io{display:grid;grid-template-columns:1fr 1fr;grid-gap:.75rem;gap:.75rem}@media (max-width:640px){.tool-io{grid-template-columns:1fr}}.tool-input,.tool-output{width:100%;resize:vertical;background:var(--surface);color:var(--fg);border:1px solid var(--border);border-radius:8px;white-space:pre}.tool-error,.tool-input,.tool-output{min-height:280px;padding:.75rem;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.85rem}.tool-error{border:1px solid var(--error);border-radius:8px;color:var(--error)}.tool-btn{background:var(--accent);color:#fff;border:none;border-radius:6px;padding:.4rem .9rem;font-weight:600;cursor:pointer}.tool-btn:disabled{opacity:.45;cursor:not-allowed}.faq-item{margin-bottom:.75rem}.faq-item dt{font-weight:600}.faq-item dd{margin:0;color:var(--muted)}code{background:var(--surface);border:1px solid var(--border);border-radius:4px;padding:.1rem .3rem;font-size:.85rem}.related-grid{list-style:none;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));grid-gap:.5rem;gap:.5rem}.tool-line-input{width:100%;padding:.6rem .75rem;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.95rem;background:var(--surface);color:var(--fg);border:1px solid var(--border);border-radius:8px}.tool-result-line{display:flex;align-items:center;gap:.75rem;margin-top:.75rem;min-height:2.25rem}.tool-result-line code{font-size:1rem}.uuid-value{font-size:1.1rem;word-break:break-all}.tool-error-inline{color:var(--error)}.muted{color:var(--muted)}.calc-fields{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));grid-gap:.75rem;gap:.75rem}.calc-fields label{display:flex;flex-direction:column;gap:.25rem;font-size:.85rem;color:var(--muted)}.calc-fields input,.calc-fields select{padding:.5rem;font-size:1rem;background:var(--surface);color:var(--fg);border:1px solid var(--border);border-radius:6px}.calc-results{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));grid-gap:.75rem;gap:.75rem;margin:1.25rem 0 0}.calc-results>div{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:.75rem}.calc-results dt{font-size:.8rem;color:var(--muted)}.calc-results dd{margin:.15rem 0 0;font-size:1.3rem;font-weight:700;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}