/* ── Reset & Base ─────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }

:root {
  --primary: #1a73e8;
  --primary-hover: #1557b0;
  --primary-light: #e8f0fe;
  --on-primary: #fff;
  --surface: #fff;
  --surface-variant: #f8f9fa;
  --surface-container: #f1f3f4;
  --outline: #dadce0;
  --outline-variant: #e8eaed;
  --text-primary: #202124;
  --text-secondary: #5f6368;
  --text-tertiary: #9aa0a6;
  --error: #d93025;
  --error-light: #fce8e6;
  --warning: #f29900;
  --warning-light: #fef7e0;
  --success: #1e8e3e;
  --success-light: #e6f4ea;
  --info: #1a73e8;
  --info-light: #e8f0fe;
  --nav-width: 220px;
  --nav-width-collapsed: 72px;
  --header-height: 64px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.12), 0 1px 2px rgba(0,0,0,.08);
  --shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
  --shadow-lg: 0 10px 15px rgba(0,0,0,.1), 0 4px 6px rgba(0,0,0,.07);
  --transition: 200ms ease;
}

html { font-size: 14px; }

body {
  font-family: 'Noto Sans JP', 'Google Sans', sans-serif;
  background: var(--surface-variant);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
}

/* ── Layout ───────────────────────────────────── */
#app { display: flex; min-height: 100vh; }

.nav-rail {
  width: var(--nav-width);
  background: var(--surface);
  border-right: 1px solid var(--outline-variant);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0;
  height: 100vh;
  z-index: 100;
  transition: width var(--transition);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 20px 20px 16px;
  border-bottom: 1px solid var(--outline-variant);
}

.brand-icon { color: var(--primary); font-size: 28px; }
.brand-text { font-weight: 700; font-size: 15px; color: var(--primary); white-space: nowrap; }

.nav-items { padding: 12px 8px; flex: 1; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 14px;
  border-radius: var(--radius-lg);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  transition: background var(--transition), color var(--transition);
  margin-bottom: 2px;
  white-space: nowrap;
}

.nav-item:hover { background: var(--surface-container); color: var(--text-primary); }
.nav-item.active { background: var(--primary-light); color: var(--primary); }
.nav-item .material-icons { font-size: 20px; flex-shrink: 0; }

.main-content {
  margin-left: var(--nav-width);
  flex: 1;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ── Page Header ──────────────────────────────── */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px 16px;
  gap: 12px;
  flex-wrap: wrap;
}

.page-header h1 { font-size: 22px; font-weight: 600; }

.page-actions { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

/* ── Search Bar ───────────────────────────────── */
.search-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--surface);
  border: 1px solid var(--outline);
  border-radius: 24px;
  padding: 8px 16px;
  min-width: 200px;
}

.search-bar input {
  border: none;
  outline: none;
  font-size: 13px;
  background: transparent;
  width: 100%;
}

.search-bar .material-icons { color: var(--text-secondary); font-size: 18px; }

/* ── Cards ────────────────────────────────────── */
.card {
  background: var(--surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--outline-variant);
  overflow: hidden;
}

.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--outline-variant);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.card-header h2 { font-size: 15px; font-weight: 600; }
.card-body { padding: 16px 20px; }

/* ── Stats Cards ──────────────────────────────── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 16px;
  padding: 0 24px 16px;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.stat-card .stat-label { font-size: 12px; color: var(--text-secondary); font-weight: 500; }
.stat-card .stat-value { font-size: 28px; font-weight: 700; color: var(--text-primary); }
.stat-card .stat-icon { color: var(--primary); font-size: 20px; }

/* ── Table ────────────────────────────────────── */
.table-wrap { overflow-x: auto; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

thead th {
  padding: 10px 16px;
  text-align: left;
  font-weight: 600;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--outline-variant);
  white-space: nowrap;
  background: var(--surface-variant);
}

tbody tr {
  border-bottom: 1px solid var(--outline-variant);
  transition: background var(--transition);
  cursor: pointer;
}

tbody tr:hover { background: var(--surface-container); }
tbody tr:last-child { border-bottom: none; }

td {
  padding: 12px 16px;
  vertical-align: middle;
  color: var(--text-primary);
}

/* ── Badges ───────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  white-space: nowrap;
}

.badge-blue { background: var(--info-light); color: var(--info); }
.badge-green { background: var(--success-light); color: var(--success); }
.badge-orange { background: var(--warning-light); color: var(--warning); }
.badge-red { background: var(--error-light); color: var(--error); }
.badge-gray { background: var(--surface-container); color: var(--text-secondary); }

/* ── Buttons ──────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: background var(--transition), box-shadow var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn .material-icons { font-size: 17px; }

.btn-primary { background: var(--primary); color: var(--on-primary); }
.btn-primary:hover:not(:disabled) { background: var(--primary-hover); box-shadow: var(--shadow-sm); }

.btn-outlined {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--outline);
}
.btn-outlined:hover:not(:disabled) { background: var(--primary-light); }

.btn-text {
  background: transparent;
  color: var(--primary);
  padding: 8px 12px;
}
.btn-text:hover:not(:disabled) { background: var(--primary-light); }

.btn-danger { background: var(--error); color: #fff; }
.btn-danger:hover:not(:disabled) { background: #b71c1c; }

.btn-sm { padding: 5px 12px; font-size: 12px; }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border-radius: 50%;
  border: none;
  background: transparent;
  cursor: pointer;
  color: var(--text-secondary);
  transition: background var(--transition);
}
.icon-btn:hover { background: var(--surface-container); }

/* ── Forms ────────────────────────────────────── */
.form-group { margin-bottom: 16px; }
.form-label { display: block; font-size: 12px; font-weight: 600; color: var(--text-secondary); margin-bottom: 6px; }
.form-label.required::after { content: ' *'; color: var(--error); }

.form-control {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--outline);
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-family: inherit;
  color: var(--text-primary);
  background: var(--surface);
  transition: border-color var(--transition);
  outline: none;
}

.form-control:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(26,115,232,.1); }
.form-control:disabled { background: var(--surface-variant); }

select.form-control { cursor: pointer; }
textarea.form-control { resize: vertical; min-height: 80px; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

/* ── Detail Page ──────────────────────────────── */
.detail-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 20px 24px 0;
  gap: 12px;
  flex-wrap: wrap;
}

.detail-title { font-size: 22px; font-weight: 600; }
.detail-subtitle { font-size: 13px; color: var(--text-secondary); margin-top: 4px; }

.detail-body { padding: 16px 24px; display: flex; flex-direction: column; gap: 20px; }

.detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.detail-field .field-label { font-size: 11px; font-weight: 600; color: var(--text-secondary); text-transform: uppercase; margin-bottom: 4px; }
.detail-field .field-value { font-size: 13px; color: var(--text-primary); }
.detail-field a { color: var(--primary); text-decoration: none; }
.detail-field a:hover { text-decoration: underline; }

/* ── Email Thread ─────────────────────────────── */
.email-thread { display: flex; flex-direction: column; gap: 12px; }

.email-bubble {
  max-width: 80%;
  padding: 12px 16px;
  border-radius: var(--radius-md);
}

.email-bubble.inbound {
  background: var(--surface-container);
  border-radius: 4px var(--radius-md) var(--radius-md) var(--radius-md);
  align-self: flex-start;
}

.email-bubble.outbound {
  background: var(--primary-light);
  border-radius: var(--radius-md) 4px var(--radius-md) var(--radius-md);
  align-self: flex-end;
}

.email-meta { font-size: 11px; color: var(--text-tertiary); margin-bottom: 6px; }
.email-body { font-size: 13px; white-space: pre-wrap; line-height: 1.6; }

/* ── Modal ────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.modal {
  background: var(--surface);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
}

.modal-header {
  padding: 20px 20px 16px;
  border-bottom: 1px solid var(--outline-variant);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-header h3 { font-size: 17px; font-weight: 600; }
.modal-body { padding: 20px; overflow-y: auto; flex: 1; }
.modal-footer { padding: 12px 20px; border-top: 1px solid var(--outline-variant); display: flex; gap: 8px; justify-content: flex-end; }

/* ── Toast ────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: #323232;
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 500;
  z-index: 2000;
  transition: transform 300ms ease;
  white-space: nowrap;
}

.toast.show { transform: translateX(-50%) translateY(0); }

/* ── Empty State ──────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
}

.empty-state .material-icons { font-size: 56px; color: var(--text-tertiary); margin-bottom: 12px; }
.empty-state h3 { font-size: 16px; margin-bottom: 8px; }
.empty-state p { font-size: 13px; }

/* ── Tabs ─────────────────────────────────────── */
.tabs {
  display: flex;
  border-bottom: 1px solid var(--outline-variant);
  padding: 0 24px;
  gap: 4px;
}

.tab {
  padding: 12px 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  border: none;
  background: transparent;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color var(--transition), border-color var(--transition);
  white-space: nowrap;
}

.tab.active { color: var(--primary); border-bottom-color: var(--primary); }
.tab:hover:not(.active) { color: var(--text-primary); background: var(--surface-container); }

/* ── Divider ──────────────────────────────────── */
.divider { border: none; border-top: 1px solid var(--outline-variant); margin: 0; }

/* ── Chip ─────────────────────────────────────── */
.chip-group { display: flex; gap: 6px; flex-wrap: wrap; }

.chip {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
  background: var(--surface-container);
  color: var(--text-secondary);
  cursor: pointer;
  border: 1px solid var(--outline-variant);
  transition: background var(--transition);
}

.chip.active { background: var(--primary-light); color: var(--primary); border-color: var(--primary-light); }
.chip:hover:not(.active) { background: var(--outline-variant); }

/* ── AI Reply Box ─────────────────────────────── */
.ai-reply-box {
  background: #f0f7ff;
  border: 1px solid #b3d1f5;
  border-radius: var(--radius-md);
  padding: 14px 16px;
  font-size: 13px;
  line-height: 1.6;
  white-space: pre-wrap;
}

/* ── Dashboard ────────────────────────────────── */
.dashboard-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  padding: 0 24px 24px;
}

/* ── Loader ───────────────────────────────────── */
.loader {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  color: var(--text-secondary);
  gap: 8px;
  font-size: 13px;
}

@keyframes spin { to { transform: rotate(360deg); } }
.spinner {
  width: 20px; height: 20px;
  border: 2px solid var(--outline-variant);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin .8s linear infinite;
}

/* ── Mobile ───────────────────────────────────── */
@media (max-width: 768px) {
  .nav-rail {
    width: 100%;
    height: auto;
    top: auto;
    bottom: 0;
    left: 0;
    right: 0;
    flex-direction: row;
    border-right: none;
    border-top: 1px solid var(--outline-variant);
    height: 60px;
    overflow: hidden;
  }

  .nav-brand { display: none; }

  .nav-items {
    display: flex;
    flex-direction: row;
    padding: 0;
    width: 100%;
    justify-content: space-around;
  }

  .nav-item {
    flex-direction: column;
    gap: 2px;
    padding: 8px 4px;
    font-size: 10px;
    border-radius: var(--radius-sm);
    flex: 1;
    justify-content: center;
    margin-bottom: 0;
  }

  .nav-item .material-icons { font-size: 22px; }

  .main-content {
    margin-left: 0;
    padding-bottom: 60px;
  }

  .dashboard-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .modal { max-height: 95vh; }

  .detail-header { padding: 16px 16px 0; }
  .page-header { padding: 16px 16px 12px; }
  .detail-body { padding: 12px 16px; }
  .tabs { padding: 0 16px; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .nav-label { display: none; }
}

/* ── Kanban Board ──────────────────────────────── */
.kanban-board {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  padding: 0 24px 32px;
  align-items: start;
}

.kanban-col {
  background: var(--surface-container);
  border-radius: var(--radius-md);
  overflow: hidden;
  min-height: 200px;
}

.kanban-col-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--outline-variant);
}

.kanban-count {
  margin-left: auto;
  font-size: 12px;
  font-weight: 600;
  padding: 2px 9px;
  border-radius: 999px;
}

.kanban-cards {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 10px;
}

.kanban-empty {
  text-align: center;
  padding: 24px 0;
  color: var(--text-tertiary);
  font-size: 12px;
}

.todo-card {
  background: var(--surface);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-sm);
  padding: 12px;
  cursor: pointer;
  transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.todo-card:hover {
  box-shadow: var(--shadow-sm);
  border-color: var(--primary);
  transform: translateY(-1px);
}

.todo-priority {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
  letter-spacing: .02em;
}

.todo-chip {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-size: 11px;
  color: var(--text-secondary);
  background: var(--surface-container);
  border-radius: 999px;
  padding: 2px 7px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 120px;
}

.todo-title {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1.45;
  margin: 4px 0 2px;
}

.todo-desc {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 4px;
}

.todo-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 8px;
  gap: 4px;
}

.todo-due {
  font-size: 11px;
  color: var(--text-tertiary);
  font-weight: 500;
}

.todo-due.overdue {
  color: var(--error);
}

.todo-next-btn {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  background: var(--surface-container);
  border: 1px solid var(--outline-variant);
  border-radius: 6px;
  padding: 3px 8px;
  cursor: pointer;
  font-family: inherit;
  font-size: 11px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
  flex-shrink: 0;
}

.todo-next-btn:hover {
  background: var(--primary-light);
  color: var(--primary);
  border-color: var(--primary);
}

@media (max-width: 900px) {
  .kanban-board { grid-template-columns: 1fr; padding: 0 16px 24px; }
}