:root {
  color-scheme: light dark;
  --ink: #16181d;
  --muted: #6b7280;
  --line: #e5e7eb;
  --bg: #ffffff;
  --accent: #1d4ed8;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e8eaed;
    --muted: #9aa1ab;
    --line: #2b2f36;
    --bg: #14161a;
    --accent: #7ba2ff;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0 auto;
  padding: 32px 20px 64px;
  max-width: 720px;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.6 -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
}

h1 { font-size: 22px; margin: 0 0 4px; }
h2 { font-size: 18px; margin: 0 0 6px; line-height: 1.35; }

header { margin-bottom: 28px; }

article {
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

article p { margin: 0 0 8px; }

a { color: var(--accent); }

.muted { color: var(--muted); font-size: 14px; }
.section { text-transform: lowercase; }
.error { color: #b91c1c; min-height: 1.4em; font-size: 14px; }

.notice {
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 15px;
}

.control { max-width: 420px; }

input[type="password"] {
  width: 100%;
  padding: 11px 13px;
  margin-bottom: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: transparent;
  color: inherit;
  font: inherit;
}

button {
  padding: 11px 20px;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  cursor: pointer;
}

button:disabled { opacity: .45; cursor: not-allowed; }

button.link {
  margin-top: 28px;
  padding: 0;
  background: none;
  color: var(--muted);
  font-size: 14px;
  text-decoration: underline;
}