:root {
  --ink: #1c1916;
  --muted: #5c564e;
  --paper: #f7f3eb;
  --wash: #ebe4d6;
  --accent: #2f4a6e;
  --line: rgba(28, 25, 22, 0.12);
  --ok: #2f5d3a;
  --warn: #8a4b12;
  --danger: #8b2e2e;
  --mono: "IBM Plex Mono", "SF Mono", ui-monospace, monospace;
  --sans: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Helvetica Neue", sans-serif;
  --display: "Source Han Serif SC", "Noto Serif SC", "Songti SC", Georgia, serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 10% -10%, #fff9ee 0%, transparent 55%),
    radial-gradient(900px 500px at 100% 0%, #e7eef7 0%, transparent 50%),
    var(--paper);
  font-family: var(--sans);
  line-height: 1.55;
}

a { color: var(--accent); text-underline-offset: 0.15em; }
a:hover { color: #1d3350; }

.wrap {
  width: min(720px, calc(100% - 2.5rem));
  margin: 0 auto;
  padding: 3.5rem 0 4.5rem;
}

.brand {
  font-family: var(--display);
  font-size: clamp(2.4rem, 6vw, 3.4rem);
  letter-spacing: 0.02em;
  margin: 0 0 0.35rem;
  font-weight: 600;
}

.slogan {
  font-size: 1.35rem;
  margin: 0 0 1.25rem;
  color: var(--ink);
}

.lede {
  margin: 0 0 2rem;
  color: var(--muted);
  max-width: 36em;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
}

.btn {
  appearance: none;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  border-radius: 999px;
  padding: 0.7rem 1.25rem;
  font: inherit;
  text-decoration: none;
  cursor: pointer;
}

.btn.secondary {
  background: transparent;
  color: var(--ink);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.note {
  border-top: 1px solid var(--line);
  padding-top: 1.25rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.nav {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
  font-size: 0.95rem;
}

.card {
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid var(--line);
  border-radius: 1rem;
  padding: 1.25rem 1.35rem;
  margin: 1.25rem 0;
}

.mono {
  font-family: var(--mono);
  font-size: 0.92rem;
  word-break: break-all;
  background: var(--wash);
  border-radius: 0.6rem;
  padding: 0.85rem 1rem;
}

.status { margin: 0.75rem 0; }
.status.ok { color: var(--ok); }
.status.warn { color: var(--warn); }
.status.err { color: var(--danger); }

h1, h2, h3 { font-family: var(--display); font-weight: 600; }
h1 { font-size: 1.8rem; margin: 0 0 1rem; }
h2 { font-size: 1.25rem; margin: 2rem 0 0.75rem; }

.privacy p, .privacy li { color: var(--muted); }
.privacy ul { padding-left: 1.2rem; }

footer {
  margin-top: 3rem;
  color: var(--muted);
  font-size: 0.85rem;
}