:root {
  --bg: #f4f5f7;
  --surface: #fff;
  --text: #1c2430;
  --muted: #667085;
  --border: #dfe3e8;
  --accent: #0b63ce;
  --danger: #c0362c;
  --success-bg: #e4f5ea;
  --success-text: #17663a;
  --error-bg: #fce9e7;
  --error-text: #9d2a21;
  --warn-bg: #fdf2d8;
  --warn-text: #80590b;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
}

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

h1 {
  font-size: 1.5rem;
  margin: 0 0 16px;
}

h2 {
  font-size: 1.05rem;
  margin: 0 0 12px;
}

h2 small,
.muted {
  color: var(--muted);
  font-weight: 400;
}

.topbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.brand {
  color: var(--text);
  font-weight: 650;
  text-decoration: none;
}

.topbar nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  align-items: center;
}

main {
  max-width: 1040px;
  margin: 0 auto;
  padding: 24px 16px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 20px;
  margin-bottom: 16px;
}

.narrow {
  max-width: 440px;
  margin: 32px auto;
}

.notice {
  padding: 10px 14px;
  border-radius: 6px;
  background: var(--warn-bg);
  color: var(--warn-text);
}

.notice.error {
  background: var(--error-bg);
  color: var(--error-text);
}

.notice.success {
  background: var(--success-bg);
  color: var(--success-text);
}

.stack {
  display: grid;
  gap: 12px;
}

.row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  align-items: flex-end;
}

.inline {
  display: inline;
}

label {
  display: grid;
  gap: 4px;
  font-size: 0.9rem;
  color: var(--muted);
}

input,
select {
  font: inherit;
  color: var(--text);
  background: var(--surface);
  padding: 7px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
}

button {
  font: inherit;
  color: #fff;
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 6px;
  padding: 7px 14px;
  cursor: pointer;
}

button.secondary {
  color: var(--text);
  background: var(--surface);
  border-color: var(--border);
}

button.danger {
  color: var(--danger);
  background: var(--surface);
  border-color: var(--danger);
}

button.link {
  color: var(--accent);
  background: none;
  border: 0;
  padding: 0;
  text-decoration: underline;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.rows {
  list-style: none;
  margin: 0;
  padding: 0;
}

.rows li {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  padding: 8px 0;
  border-top: 1px solid var(--border);
  overflow-wrap: anywhere;
}

.rows li:first-child {
  border-top: 0;
}

.mail-list a {
  display: grid;
  gap: 2px;
  width: 100%;
  color: var(--text);
  text-decoration: none;
}

.mail-list a:hover strong {
  color: var(--accent);
}

.preview {
  color: var(--muted);
  font-size: 0.9rem;
}

.badge {
  flex: none;
  font-size: 0.8rem;
  padding: 1px 8px;
  border-radius: 999px;
  background: var(--warn-bg);
  color: var(--warn-text);
}

.badge.active {
  background: var(--success-bg);
  color: var(--success-text);
}

.badge.error {
  background: var(--error-bg);
  color: var(--error-text);
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  text-align: left;
  vertical-align: middle;
  padding: 8px 12px 8px 0;
  border-top: 1px solid var(--border);
}

thead th {
  border-top: 0;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 500;
}

.actions {
  white-space: nowrap;
}

.user-code {
  font: 600 2rem/1.2 ui-monospace, Menlo, monospace;
  letter-spacing: 0.08em;
  text-align: center;
  user-select: all;
  margin: 16px 0;
}

.mail-meta {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 2px 12px;
  margin: 0 0 16px;
}

.mail-meta dt {
  color: var(--muted);
}

.mail-meta dd {
  margin: 0;
  overflow-wrap: anywhere;
}

.mail-body {
  display: block;
  width: 100%;
  height: 70vh;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
}