:root {
  --bg: #f5f6f8;
  --card: #ffffff;
  --text: #1c2733;
  --muted: #6b7a8c;
  --accent: #c8102e;
  --border: #e3e7ec;
}

body {
  margin: 0 auto;
  max-width: 48rem;
  padding: 1.5rem 1rem 4rem;
  background: var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.5;
}

a { color: inherit; text-decoration: none; }

.breadcrumbs { font-size: 0.875rem; color: var(--muted); margin-bottom: 0.5rem; }
.breadcrumbs a { color: var(--accent); }

.page-header h1 { margin: 0 0 1rem; font-size: 1.5rem; }

.card-list, .message-list { list-style: none; margin: 0; padding: 0; }

.card-list li, .message-list li {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  margin-bottom: 0.5rem;
}

.card-link {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
}

.card-link .primary { font-weight: 600; }
.card-link .secondary { color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.card-link .meta { margin-left: auto; color: var(--muted); font-size: 0.8125rem; white-space: nowrap; }

.message-list li.unseen .primary::before {
  content: "";
  display: inline-block;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--accent);
  margin-right: 0.5rem;
  vertical-align: middle;
}

.badge {
  background: var(--accent);
  color: #fff;
  border-radius: 1rem;
  padding: 0.05rem 0.5rem;
  font-size: 0.75rem;
}

.message {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 1rem 1.25rem;
}

.message-header h1 { margin: 0 0 0.75rem; font-size: 1.25rem; }

.message-header dl {
  display: grid;
  grid-template-columns: 4rem 1fr;
  gap: 0.125rem 0.75rem;
  margin: 0 0 1rem;
  font-size: 0.875rem;
}

.message-header dt { color: var(--muted); }
.message-header dd { margin: 0; }

.message-body {
  border-top: 1px solid var(--border);
  padding-top: 1rem;
  white-space: pre-wrap;
  word-wrap: break-word;
  font-family: inherit;
}

.empty { color: var(--muted); }

.trust {
  font-size: 0.75rem;
  padding: 0.05rem 0.4rem;
  border-radius: 0.75rem;
  white-space: nowrap;
}
.trust.verified { background: #e5f5ea; color: #1f7a3d; }
.trust.unverified { background: #fdecec; color: #b3261e; }

.app-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}
.app-nav .brand { font-weight: 700; color: var(--accent); }
.app-nav .signout button {
  background: none;
  border: 1px solid var(--border);
  border-radius: 0.375rem;
  padding: 0.25rem 0.75rem;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
}