:root {
  --color-bg: #f4f6ef;
  --color-surface: #ffffff;
  --color-surface-raised: #fbfaf6;
  --color-text: #1b1f18;
  --color-text-muted: #5d6559;
  --color-border: #c8d0c2;
  --color-brand: #2f6f4f;
  --color-focus: #1259c3;
  --color-success: #1f7a44;
  --color-warning: #9a6b1b;
  --color-danger: #ab2f28;
  --color-info: #17638c;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-7: 32px;
  --space-8: 40px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --shadow-sm: 0 4px 12px rgba(23, 30, 23, 0.08);
  --shadow-md: 0 12px 24px rgba(23, 30, 23, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: radial-gradient(circle at top right, #dce8d9 0%, var(--color-bg) 48%);
  color: var(--color-text);
  font-family: "Avenir Next", "Segoe UI", sans-serif;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--color-focus);
  color: #fff;
  padding: var(--space-2) var(--space-3);
  z-index: 60;
}

.skip-link:focus {
  top: 0;
}

.app-topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  min-height: 64px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-6);
}

.brand {
  font-size: 1.1rem;
  font-weight: 700;
}

.company-pill {
  margin-left: auto;
  padding: var(--space-2) var(--space-3);
  border-radius: 999px;
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border);
}

.company-pill-label {
  font-size: 0.72rem;
  color: var(--color-text-muted);
  margin-right: var(--space-2);
}

.company-pill-value {
  font-weight: 600;
}

.top-actions {
  display: flex;
  gap: var(--space-2);
}

.btn {
  border: 1px solid var(--color-brand);
  border-radius: var(--radius-sm);
  padding: var(--space-2) var(--space-4);
  font: inherit;
  background: var(--color-brand);
  color: #fff;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
}

.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}

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

.btn:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}

.app-layout {
  display: grid;
  grid-template-columns: 256px minmax(0, 1fr);
  min-height: calc(100vh - 64px);
}

.app-nav {
  border-right: 1px solid var(--color-border);
  background: #eef3ea;
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.nav-item {
  border-radius: var(--radius-sm);
  padding: var(--space-2) var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}

.nav-item.is-active {
  background: var(--color-brand);
  color: #fff;
}

.nav-item.is-disabled {
  color: var(--color-text-muted);
  cursor: not-allowed;
}

.app-main {
  padding: var(--space-6);
}

.page-header {
  display: flex;
  gap: var(--space-3);
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-5);
}

.page-header h1 {
  margin: 0;
  font-size: 1.6rem;
}

.panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: var(--space-4);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
}

.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.field label {
  font-weight: 600;
}

.field input,
.field select,
.field textarea {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  min-height: 44px;
  padding: var(--space-2) var(--space-3);
}

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

.table th,
.table td {
  padding: var(--space-3);
  border-bottom: 1px solid var(--color-border);
  text-align: left;
}

.badge {
  display: inline-flex;
  border-radius: 999px;
  padding: 2px 10px;
  border: 1px solid var(--color-border);
  font-size: 0.8rem;
}

.badge-active { background: #e6f4ea; }
.badge-archived { background: #f0efe9; }
.badge-merged { background: #f3ebfa; }
.badge-public { background: #e6f4ea; }
.badge-private { background: #fce8e6; }
.badge-event { background: #edf7fc; }

.alert-stack {
  margin-bottom: var(--space-4);
}

.alert {
  border: 1px solid var(--color-info);
  background: #edf7fc;
  border-radius: var(--radius-sm);
  padding: var(--space-3);
  margin-bottom: var(--space-2);
}

.error-summary {
  border: 1px solid var(--color-danger);
  background: #fce8e6;
  border-radius: var(--radius-sm);
  padding: var(--space-3);
  margin-bottom: var(--space-4);
}

.state-panel {
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  text-align: center;
  color: var(--color-text-muted);
}

.ticket-detail-gap-top {
  margin-top: var(--space-4);
}

.ticket-detail-gap-bottom-sm {
  margin-bottom: var(--space-3);
}

.ticket-action-row {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.ticket-composer-help {
  color: var(--color-text-muted);
}

.ticket-composer-form {
  display: grid;
  gap: var(--space-3);
}

.ticket-composer-mode {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-3);
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.ticket-timeline {
  display: grid;
  gap: var(--space-3);
}

.ticket-timeline-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-3);
  background: var(--color-surface-raised);
}

.ticket-timeline-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.ticket-timeline-subtle {
  color: var(--color-text-muted);
  margin-bottom: 0;
}

.pagination {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.mobile-nav {
  display: none;
}

.mobile-card {
  display: none;
}

.gmail-health-summary p {
  margin: 0 0 var(--space-2);
}

.gmail-state-label {
  font-size: 1rem;
}

.gmail-warning {
  color: var(--color-warning);
  font-weight: 600;
}

.gmail-action-grid {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.gmail-channel-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-3);
  margin-bottom: var(--space-3);
}

.gmail-default-form {
  display: grid;
  gap: var(--space-2);
  max-width: 420px;
}

@media (max-width: 1023px) {
  .app-layout {
    grid-template-columns: 1fr;
  }

  .app-nav {
    display: none;
  }

  .app-main {
    padding: var(--space-4);
    padding-bottom: calc(72px + env(safe-area-inset-bottom));
  }
}

@media (max-width: 767px) {
  .app-topbar {
    min-height: 56px;
    padding: var(--space-2) var(--space-3);
  }

  .company-pill {
    max-width: 160px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .top-actions {
    display: none;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .table-wrap {
    display: none;
  }

  .mobile-card {
    display: block;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    margin-bottom: var(--space-3);
  }

  .mobile-nav {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    min-height: calc(64px + env(safe-area-inset-bottom));
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    z-index: 35;
  }

  .mobile-nav-item {
    border: 0;
    background: transparent;
    font: inherit;
    color: var(--color-text-muted);
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-bottom: env(safe-area-inset-bottom);
    min-height: 64px;
  }

  .mobile-nav-item.is-active {
    color: var(--color-brand);
    font-weight: 700;
  }

  .ticket-composer-mode {
    flex-direction: column;
  }

  .ticket-action-row {
    flex-direction: column;
  }

  .gmail-action-grid {
    flex-direction: column;
  }

  .ticket-action-row .btn {
    width: 100%;
  }

  .gmail-default-form .btn {
    width: 100%;
  }

  .ticket-timeline-meta {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .panel,
  .mobile-card {
    animation: rise-in 180ms ease-out;
  }

  @keyframes rise-in {
    from {
      opacity: 0;
      transform: translateY(8px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
}

/* Change History */
/* 2026-08-21T15:25:00+09:30 | EMAIL-008 | Add Gmail settings health/recovery layout and responsive action form styles in shared shell CSS. */