:root {
  --ink: #16181d;
  --muted: #5d636f;
  --line: #d9dce2;
  --paper: #fbfbf9;
  --accent: #2e5bd8;
  --danger: #b3261e;
  --panel: #ffffff;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e8e9ec;
    --muted: #a0a6b1;
    --line: #333844;
    --paper: #121419;
    --accent: #8aa8ff;
    --danger: #ff8a80;
    --panel: #1a1d24;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

/* An element's own `display` would otherwise override the hidden attribute. */
[hidden] { display: none !important; }

body {
  margin: 0;
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: var(--paper);
}

.bar {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  padding: 0.75rem 1.5rem;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}

.brand { font-weight: 700; color: var(--ink); text-decoration: none; letter-spacing: 0.02em; }

nav { display: flex; gap: 1rem; flex-wrap: wrap; }
nav a, a { color: var(--accent); }

#account { margin-left: auto; display: flex; gap: 0.5rem; align-items: center; color: var(--muted); }

.notice { margin: 0; padding: 0.4rem 1.5rem; font-size: 13px; color: var(--muted); border-bottom: 1px solid var(--line); }

main, [data-view] { max-width: 72rem; margin: 0 auto; padding: 1.5rem; }

[data-view="keys"] {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  margin-top: 1rem;
}

h1 { font-size: 1.5rem; margin: 0 0 1rem; }
h2 { font-size: 1.1rem; margin: 2rem 0 0.75rem; }

table { width: 100%; border-collapse: collapse; display: block; overflow-x: auto; }
th, td { text-align: left; padding: 0.45rem 0.75rem 0.45rem 0; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { font-size: 12px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); }

dl { display: grid; grid-template-columns: minmax(10rem, max-content) 1fr; gap: 0.35rem 1.25rem; }
dt { color: var(--muted); }
dd { margin: 0; overflow-wrap: anywhere; }

.grid { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 0.75rem; }
label { display: flex; flex-direction: column; gap: 0.25rem; font-size: 13px; color: var(--muted); }

input, select, button {
  font: inherit;
  padding: 0.4rem 0.6rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  color: var(--ink);
}

button { cursor: pointer; }
button:hover { border-color: var(--accent); }
button.danger { color: var(--danger); }

.once { border: 2px solid var(--accent); border-radius: 8px; padding: 0.75rem 1rem; margin: 1rem 0; }
pre { white-space: pre-wrap; overflow-wrap: anywhere; font-size: 13px; }

.caveat { border-left: 3px solid var(--accent); padding-left: 0.75rem; color: var(--muted); }
.hint { color: var(--muted); font-size: 13px; }

/* Every failure says something (2026-09-17); empty, the line takes no space. */
.problem { color: var(--danger); margin: 0.5rem 0; }
.problem:empty { display: none; }
.rule { border-left: 3px solid var(--accent); padding-left: 0.7rem; }