:root {
  color-scheme: light;
  --bg: #f5f7fa;
  --surface: #ffffff;
  --surface-2: #eef2f7;
  --text: #1f2933;
  --muted: #657280;
  --border: #d9dee5;
  --accent: #2563eb;
  --accent-strong: #1d4ed8;
  --danger: #dc2626;
  --success: #16803c;
  --shadow: 0 10px 30px rgba(31, 41, 51, 0.08);
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #111418;
  --surface: #1a1f26;
  --surface-2: #232a33;
  --text: #edf1f5;
  --muted: #a8b3bf;
  --border: #313943;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.22);
}

[data-accent="green"] { --accent: #16803c; --accent-strong: #11632f; }
[data-accent="purple"] { --accent: #7c3aed; --accent-strong: #6d28d9; }
[data-accent="gray"] { --accent: #4b5563; --accent-strong: #374151; }
[data-accent="blue"] { --accent: #2563eb; --accent-strong: #1d4ed8; }

* { box-sizing: border-box; }

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

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

input, select, button {
  font: inherit;
}

input, select {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  padding: 8px 10px;
}

button { cursor: pointer; }

.auth-body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.auth-shell { width: min(440px, 100%); }

.auth-panel, .card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.auth-panel { padding: 28px; }

.brand-block, .sidebar-brand {
  display: flex;
  gap: 12px;
  align-items: center;
}

.brand-block h1 {
  margin: 0;
  font-size: 22px;
}

.brand-block p { margin: 2px 0 0; color: var(--muted); }

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
}

.form-stack {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.form-stack label span {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 13px;
}

.form-inline {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-top: 12px;
}

.field-grid {
  display: grid;
  gap: 12px;
}

.field-grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.field-grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.check-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.check-row {
  display: flex;
  gap: 8px;
  align-items: center;
}

.check-row input { width: auto; min-height: auto; }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 14px;
  background: var(--surface);
  color: var(--text);
  font-weight: 600;
}

.button.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.button.primary:hover { background: var(--accent-strong); text-decoration: none; }
.button.secondary { background: var(--surface-2); }
.button.danger { border-color: var(--danger); color: var(--danger); }
.button.ghost { background: transparent; }
.button.full { width: 100%; }

.text-link { text-align: center; font-size: 14px; }

.notice {
  border-radius: 8px;
  padding: 10px 12px;
  margin: 16px 0;
  border: 1px solid var(--border);
}

.notice.success { border-color: rgba(22, 128, 60, 0.35); color: var(--success); }
.notice.danger { border-color: rgba(220, 38, 38, 0.35); color: var(--danger); }

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 240px 1fr;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 18px;
  background: var(--surface);
  border-right: 1px solid var(--border);
}

.sidebar-brand {
  color: var(--text);
  font-weight: 700;
}

.sidebar-nav {
  display: grid;
  gap: 6px;
}

.sidebar-nav a {
  border-radius: 8px;
  padding: 9px 10px;
  color: var(--text);
}

.sidebar-nav a:hover {
  background: var(--surface-2);
  text-decoration: none;
}

.sidebar-footer {
  margin-top: auto;
}

.main-content {
  padding: 24px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.topbar h1 { margin: 0; font-size: 24px; }

.icon-button {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
}

.grid {
  display: grid;
  gap: 16px;
}

.dashboard-grid {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.settings-grid {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.card {
  padding: 18px;
}

.card.narrow {
  max-width: 720px;
}

.card h2 {
  margin: 0 0 12px;
  font-size: 18px;
}

.metric {
  margin: 0 0 8px;
  font-size: 28px;
  font-weight: 700;
}

.muted { color: var(--muted); }
.break-all { word-break: break-all; }

.detail-list {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 8px 14px;
}

.detail-list dt { color: var(--muted); }
.detail-list dd { margin: 0; }

.setup-box {
  display: grid;
  gap: 10px;
}

.qr-box {
  display: inline-grid;
  place-items: center;
  width: 220px;
  max-width: 100%;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
}

.qr-box img {
  display: block;
  width: 100%;
  height: auto;
}

[data-density="compact"] body,
[data-density="compact"] input,
[data-density="compact"] select,
[data-density="compact"] button {
  font-size: 14px;
}

[data-density="compact"] .card {
  padding: 14px;
}

.code-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 8px;
  margin-bottom: 14px;
}

code {
  display: inline-block;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface-2);
  padding: 4px 6px;
}

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

.table-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.table-actions form {
  margin: 0;
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.mail-toolbar {
  display: grid;
  grid-template-columns: 1fr minmax(220px, 320px);
  gap: 16px;
  align-items: end;
}

.mail-filter-form {
  display: grid;
  grid-template-columns: minmax(180px, 2fr) minmax(150px, 1fr) minmax(180px, 1fr) auto;
  gap: 12px;
  align-items: end;
}

.mail-sync-form {
  display: grid;
  gap: 10px;
}

.mail-side-actions {
  display: grid;
  gap: 12px;
}

.mail-search-setting-form {
  display: flex;
  gap: 10px;
  align-items: center;
  justify-content: space-between;
}

.mail-toolbar label span,
.mail-filter-form label span,
.mail-sync-form label span {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 13px;
}

.mail-toolbar-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.mail-list-header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.mail-list-header h2,
.message-title {
  margin: 0 0 12px;
}

.mail-subject {
  display: block;
  font-weight: 700;
  color: var(--text);
}

.mail-snippet,
.mail-small {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: 13px;
}

.mail-badge {
  display: inline-flex;
  margin-top: 6px;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px 8px;
  color: var(--muted);
  font-size: 12px;
}

.mail-unread .mail-subject {
  color: var(--accent);
}

.pagination {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 14px;
}

.message-meta {
  margin-top: 14px;
}

.message-body {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  overflow: hidden;
}

.message-text {
  padding: 16px;
  white-space: normal;
}

.message-html-frame {
  display: block;
  width: 100%;
  min-height: 520px;
  border: 0;
  background: #fff;
}

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

th, td {
  border-bottom: 1px solid var(--border);
  padding: 9px;
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--muted);
  font-weight: 600;
}

@media (max-width: 780px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    height: auto;
  }

  .sidebar-nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .main-content {
    padding: 16px;
  }

  .form-inline {
    display: grid;
  }

  .field-grid.two,
  .field-grid.three {
    grid-template-columns: 1fr;
  }

  .mail-toolbar,
  .mail-filter-form {
    grid-template-columns: 1fr;
  }

  .mail-toolbar-actions {
    display: grid;
  }
}