:root {
  color-scheme: light dark;
  --ink: #13151a;
  --muted: #5c6370;
  --line: #e4e6eb;
  --accent: #2f6fed;
  --bg: #fbfbfd;
  --danger: #b42318;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e8eaf0;
    --muted: #9aa1ae;
    --line: #272a31;
    --accent: #7aa2f7;
    --bg: #0e1013;
    --danger: #f97066;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(1200px 600px at 10% -10%, color-mix(in srgb, var(--accent) 18%, transparent), transparent),
    var(--bg);
  color: var(--ink);
}

main {
  max-width: 36rem;
  margin: 0 auto;
  padding: 4rem 1.25rem 6rem;
}

h1 { font-size: 1.75rem; margin: 0 0 0.5rem; letter-spacing: -0.02em; }
h2 { font-size: 1.1rem; margin: 2rem 0 0.5rem; }
p { line-height: 1.5; color: var(--muted); }
.muted { color: var(--muted); font-size: 0.95rem; }

label { display: grid; gap: 0.35rem; margin: 1.25rem 0; font-weight: 600; }

input {
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 0.4rem;
  background: transparent;
  color: var(--ink);
  font: inherit;
}

button {
  padding: 0.7rem 1rem;
  border: 0;
  border-radius: 0.4rem;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

button.ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}

.row { display: flex; gap: 0.75rem; align-items: center; flex-wrap: wrap; }
.row h1 { flex: 1; }

ul { list-style: none; padding: 0; margin: 1rem 0 0; }
li {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  padding: 0.75rem 0;
  border-top: 1px solid var(--line);
  font-size: 0.95rem;
}
li span { flex: 1; }

.error { color: var(--danger); }
.once {
  margin-top: 1rem;
  padding: 0.85rem;
  border: 1px solid var(--line);
  border-radius: 0.4rem;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
}