:root {
  --bg: #f6f7f9; --fg: #1d2330; --muted: #5f6b7a; --card: #fff; --line: #dde2e8;
  --accent: #1f5fbf; --accent-fg: #fff; --danger: #b42318; --hl: #fff7e0; --code: #eef1f5;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #12161c; --fg: #e6e9ee; --muted: #9aa5b3; --card: #1b2028; --line: #2c3440;
          --accent: #5b9cff; --accent-fg: #0b1220; --danger: #ff6b5e; --hl: #2a2414; --code: #232a35; }
}
* { box-sizing: border-box; }
body { margin: 0; font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; background: var(--bg); color: var(--fg); }
.top { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap;
       padding: .75rem 1rem; border-bottom: 1px solid var(--line); background: var(--card); }
.brand { font-weight: 600; color: var(--fg); text-decoration: none; }
.who { display: flex; gap: .75rem; align-items: center; margin: 0; }
main { max-width: 960px; margin: 0 auto; padding: 1rem; }
footer { text-align: center; color: var(--muted); font-size: .85rem; padding: 2rem 1rem; }
h1 { font-size: 1.6rem; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 1rem; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 1rem 1.25rem; margin-bottom: 1rem; }
.card.narrow { max-width: 420px; margin: 2rem auto; }
.card.disabled { opacity: .65; }
.card.highlight { background: var(--hl); }
.muted { color: var(--muted); }
.error { color: var(--danger); font-weight: 500; }
label { display: block; margin: .5rem 0; }
input { display: block; width: 100%; padding: .5rem; margin-top: .25rem; border: 1px solid var(--line);
        border-radius: 6px; background: var(--bg); color: var(--fg); font: inherit; }
button, .button { display: inline-block; padding: .5rem 1rem; border: 0; border-radius: 6px; background: var(--accent);
                  color: var(--accent-fg); font: inherit; cursor: pointer; text-decoration: none; }
button.link { background: none; color: var(--accent); padding: 0; }
button.danger { background: var(--danger); color: #fff; padding: .25rem .6rem; font-size: .9rem; }
form.inline { display: flex; gap: .75rem; align-items: end; flex-wrap: wrap; }
form.inline label { flex: 1 1 240px; margin: 0; }
table { width: 100%; border-collapse: collapse; display: block; overflow-x: auto; }
th, td { text-align: left; padding: .4rem .5rem; border-bottom: 1px solid var(--line); white-space: nowrap; }
code, pre { background: var(--code); border-radius: 4px; font-family: ui-monospace, monospace; font-size: .9rem; }
code { padding: .05rem .3rem; }
pre { padding: .75rem; overflow-x: auto; }
pre.secret { font-size: 1rem; user-select: all; white-space: pre-wrap; word-break: break-all; }