:root {
  --ink: #111;
  --bg: #fff;
  --accent: #b00000;
  --border: #d9d9d9;
  --link: #0645ad;
}

html, body {
  height: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.5 ui-serif, Georgia, Cambria, "Times New Roman", Times, serif;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1rem 4rem;
}

header {
  border-bottom: 1px solid var(--border);
  padding-bottom: 1rem;
  margin-bottom: 1.5rem;
}

h1 {
  margin: 0;
  font-weight: 600;
  letter-spacing: .25px;
}

h2 {
  font-size: 1.25rem;
  margin: 1.5rem 0 .5rem;
}

h3 {
  font-size: 1rem;
  margin: 1rem 0 .25rem;
  font-variant: small-caps;
}

.subtitle {
  font-variant: small-caps;
  letter-spacing: .06em;
  color: #444;
  margin: .25rem 0 0;
}

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

.notice {
  border: 1px solid var(--border);
  background: #f9f9f9;
  padding: 1rem;
}

.notice strong {
  display: block;
}

.important {
  color: var(--accent);
  font-weight: 700;
}

.list {
  margin: 1.25rem 0;
  padding-left: 1.25rem;
}

.list li {
  margin: .5rem 0;
}

.btn {
  font: inherit;
  border: 1px solid var(--border);
  background: #f6f6f6;
  padding: .5rem .85rem;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  display: inline-block;
}

.btn:hover {
  background: #eee;
}

.btn.danger {
  border-color: var(--accent);
  color: var(--accent);
  background: #fff5f5;
}

.ack-row {
  display: flex;
  align-items: center;
  gap: .5rem;
  margin: 1.5rem 0;
}

.ack-row input {
  transform: scale(1.2);
}

.actions {
  display: flex;
  gap: .75rem;
  margin: 1.5rem 0;
}

.small {
  font-size: .9375rem;
  color: #333;
}

.disabled {
  opacity: .5;
  pointer-events: none;
}

hr {
  border: 0;
  border-top: 1px solid var(--border);
}