:root {
  --bg: #0d1117;
  --panel: #161b22;
  --line: #232b36;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #2f81f7;
  --good: #3fb950;
  --bad: #f85149;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.6 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

main { max-width: 920px; margin: 0 auto; padding: 40px 20px 64px; }

.nav {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding: 14px 22px; border-bottom: 1px solid var(--line);
  position: sticky; top: 0; background: rgba(13, 17, 23, .9); backdrop-filter: blur(8px);
}

.brand { font-weight: 700; letter-spacing: -.02em; color: var(--text); text-decoration: none; }
.brand span { color: var(--accent); }

.nav nav { display: flex; align-items: center; gap: 18px; }
.nav a { color: var(--muted); text-decoration: none; font-size: 14px; }
.nav a:hover { color: var(--text); }
.nav a.cta { color: var(--text); border: 1px solid var(--line); padding: 6px 12px; border-radius: 7px; }
.inline { display: inline; }

h1 { font-size: 30px; letter-spacing: -.02em; margin: 0 0 8px; }
h2 { font-size: 19px; margin: 32px 0 8px; }
h3 { font-size: 15px; margin: 0 0 6px; }
.lede { color: var(--muted); max-width: 60ch; }

.hero { padding: 32px 0 12px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; margin: 28px 0; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 16px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; }

.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.spread { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; flex-wrap: wrap; }
.narrow { max-width: 620px; }

.btn {
  display: inline-block; background: var(--accent); color: #fff; border: 0;
  padding: 10px 16px; border-radius: 8px; font-size: 14px; font-weight: 600;
  cursor: pointer; text-decoration: none;
}
.btn:hover { filter: brightness(1.08); }
.btn.ghost { background: transparent; border: 1px solid var(--line); color: var(--text); }

label { display: block; font-size: 13px; color: var(--muted); }
.stack { display: grid; gap: 14px; margin: 22px 0; }
input, select {
  width: 100%; margin-top: 6px; padding: 10px 12px; border-radius: 8px;
  border: 1px solid var(--line); background: var(--panel); color: var(--text); font-size: 14px;
}
input:focus, select:focus { outline: 2px solid rgba(47, 129, 247, .45); outline-offset: 1px; }
.hint { color: var(--muted); font-weight: 400; }

.result { margin-top: 22px; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 16px; }
dl { display: grid; grid-template-columns: 120px 1fr; gap: 6px 14px; margin: 0; font-size: 14px; }
dt { color: var(--muted); }

.good { color: var(--good); }
.bad { color: var(--bad); }
.muted { color: var(--muted); }

.keys { width: 100%; border-collapse: collapse; margin-top: 22px; font-size: 14px; }
.keys th { text-align: left; font-weight: 500; color: var(--muted); border-bottom: 1px solid var(--line); padding: 8px 10px; }
.keys td { padding: 10px; border-bottom: 1px solid var(--line); }
.keys tr.revoked td { opacity: .5; }

code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px; }
code { background: #0b0f14; border: 1px solid var(--line); padding: 2px 6px; border-radius: 5px; }
pre { background: #0b0f14; border: 1px solid var(--line); border-radius: 10px; padding: 14px; overflow: auto; }
pre code { border: 0; background: none; padding: 0; }

.keybox { margin: 16px 0; background: #10251a; border: 1px solid #1f6f43; border-radius: 10px; padding: 14px; }
.keybox code.full { display: block; margin-top: 8px; word-break: break-all; }

.tag { font-size: 12px; color: var(--muted); border: 1px solid var(--line); padding: 3px 8px; border-radius: 99px; }

button.link { background: none; border: 0; color: var(--muted); cursor: pointer; font-size: 14px; padding: 0; text-decoration: underline; }
button.link:hover { color: var(--bad); }

footer {
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  max-width: 920px; margin: 0 auto; padding: 20px; border-top: 1px solid var(--line);
  color: var(--muted); font-size: 12px;
}

@media (max-width: 560px) {
  main { padding: 24px 16px 48px; }
  dl { grid-template-columns: 100px 1fr; }
  .keys { font-size: 13px; }
  .keys th:nth-child(3), .keys td:nth-child(3) { display: none; }
}