:root{--bg: #f5f7f9;--surface: #ffffff;--ink: #16222e;--ink-soft: #5b6b7a;--line: #dde4ea;--accent: #0f4c81;--ok: #1a7f4b;--down: #b3261e;--mono: "IBM Plex Mono", ui-monospace, monospace;--sans: "IBM Plex Sans", system-ui, sans-serif}*{box-sizing:border-box;margin:0}body{background:var(--bg);color:var(--ink);font-family:var(--sans);-webkit-font-smoothing:antialiased}.shell{max-width:960px;margin:0 auto;padding:48px 24px 64px}.masthead{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;flex-wrap:wrap;border-bottom:2px solid var(--ink);padding-bottom:20px}.eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin-bottom:6px}h1{font-size:clamp(24px,4vw,34px);font-weight:600;letter-spacing:-.01em}.status-chip{font-family:var(--mono);font-size:13px;display:inline-flex;align-items:center;gap:8px;padding:8px 14px;border:1px solid var(--line);border-radius:999px;background:var(--surface)}.status-chip .dot{width:8px;height:8px;border-radius:50%;background:var(--ink-soft)}.status-chip.ok .dot{background:var(--ok)}.status-chip.ok{color:var(--ok);border-color:color-mix(in srgb,var(--ok) 35%,white)}.status-chip.down .dot{background:var(--down)}.status-chip.down{color:var(--down);border-color:color-mix(in srgb,var(--down) 35%,white)}@media (prefers-reduced-motion: no-preference){.status-chip.checking .dot,.status-chip.ok .dot{animation:pulse 2s ease-in-out infinite}}@keyframes pulse{50%{opacity:.35}}.lede{margin:20px 0 32px;color:var(--ink-soft);max-width:62ch;line-height:1.55}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));gap:16px}.card{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:20px}.card h2{font-family:var(--mono);font-size:12px;text-transform:uppercase;letter-spacing:.12em;color:var(--ink-soft);margin-bottom:14px}.row{display:flex;justify-content:space-between;gap:12px;padding:7px 0;border-bottom:1px dashed var(--line);font-size:14px}.row:last-child{border-bottom:none}.row-label{color:var(--ink-soft)}.row-value{font-family:var(--mono);font-size:13px;text-align:right;word-break:break-all}.hint{font-size:13px;color:var(--ink-soft);line-height:1.5;margin-bottom:14px}button{font-family:var(--mono);font-size:13px;padding:9px 16px;border-radius:6px;border:1px solid var(--accent);background:var(--accent);color:#fff;cursor:pointer}button:hover{background:#0c3e6a}button:disabled{opacity:.6;cursor:default}button:focus-visible{outline:2px solid var(--ink);outline-offset:2px}button.ghost{background:transparent;color:var(--accent)}button.ghost:hover{background:#eef3f8}.echo-result{margin-top:14px;font-family:var(--mono);font-size:12px;background:#f0f4f8;border:1px solid var(--line);border-radius:6px;padding:12px;overflow-x:auto}.error{color:var(--down);font-size:13px;margin:8px 0}footer{margin-top:32px;display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;font-family:var(--mono);font-size:12px;color:var(--ink-soft)}