* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #2B7DE9;
  --primary-hover: #1D6AD4;
  --sidebar-width: 230px;
  --border: #E8EDF2;
  --bg: #F5F7FA;
  --text: #1A2233;
  --text-secondary: #6B7A8D;
  --white: #fff;
  --success: #34C759;
  --warning: #FF9500;
  --danger: #FF3B30;
  --radius: 10px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  font-size: 14px;
}

/* ─── Layout ─── */
.layout {
  display: flex;
  min-height: 100vh;
}

/* ─── Sidebar ─── */
.sidebar {
  width: var(--sidebar-width);
  background: var(--white);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
}

.sidebar-brand {
  padding: 20px 20px 12px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 10px;
}

.sidebar-brand svg {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.sidebar-section {
  padding: 8px 12px 4px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.sidebar-nav {
  flex: 1;
  padding: 8px 0;
  overflow-y: auto;
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 20px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 450;
  transition: all 0.15s;
  border-left: 3px solid transparent;
}

.sidebar-nav a:hover {
  color: var(--text);
  background: var(--bg);
}

.sidebar-nav a.active {
  color: var(--primary);
  background: #EBF3FD;
  border-left-color: var(--primary);
  font-weight: 550;
}

.sidebar-nav a svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  opacity: 0.6;
}

.sidebar-nav a.active svg {
  opacity: 1;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
}

.sidebar-footer .avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  flex-shrink: 0;
}

.sidebar-footer .user-info {
  flex: 1;
  min-width: 0;
}

.sidebar-footer .user-name {
  font-weight: 600;
  font-size: 13px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-footer .user-email {
  font-size: 11px;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-footer .logout-btn {
  color: var(--text-secondary);
  text-decoration: none;
  padding: 4px;
  border-radius: 6px;
  transition: all 0.15s;
}

.sidebar-footer .logout-btn:hover {
  color: var(--danger);
  background: #FFF0F0;
}

/* ─── Main content ─── */
.main {
  margin-left: var(--sidebar-width);
  flex: 1;
  padding: 24px 32px;
  min-height: 100vh;
}

.page-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.page-header h1 {
  font-size: 20px;
  font-weight: 700;
}

.page-header .badge {
  margin-left: 4px;
}

/* ─── Tabs ─── */
.tabs {
  display: flex;
  gap: 4px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 4px;
  width: fit-content;
  margin-bottom: 20px;
}

.tab {
  padding: 8px 16px;
  border-radius: 7px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.15s;
  display: flex;
  align-items: center;
  gap: 6px;
}

.tab:hover {
  color: var(--text);
  background: var(--bg);
}

.tab.active {
  color: var(--text);
  background: var(--bg);
  font-weight: 600;
}

.tab svg {
  width: 16px;
  height: 16px;
}

/* ─── Toolbar ─── */
.toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 12px;
  flex: 1;
  max-width: 320px;
}

.search-box svg {
  width: 16px;
  height: 16px;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.search-box input {
  border: none;
  outline: none;
  font-size: 13px;
  width: 100%;
  background: transparent;
  color: var(--text);
}

.search-box input::placeholder {
  color: #B0B8C4;
}

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: none;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 550;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s;
  white-space: nowrap;
}

.btn svg {
  width: 16px;
  height: 16px;
}

.btn-primary {
  background: var(--primary);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-success {
  background: var(--success);
  color: var(--white);
}

.btn-success:hover {
  background: #2DB84E;
}

.btn-outline {
  background: var(--white);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-outline:hover {
  background: var(--bg);
  border-color: #D0D8E0;
}

.btn-sm {
  padding: 5px 10px;
  font-size: 12px;
}

.btn-icon {
  padding: 8px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-secondary);
  cursor: pointer;
}

.btn-icon:hover {
  background: var(--bg);
  color: var(--text);
}

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

.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  font-weight: 600;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-body {
  padding: 20px;
}

/* ─── Stats grid ─── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.stat-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.2;
}

.stat-label {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.stat-highlight .stat-value {
  color: var(--primary);
}

/* ─── Table ─── */
.table-wrap {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

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

thead th {
  padding: 10px 16px;
  text-align: left;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
  user-select: none;
}

thead th .sort-icon {
  display: inline-block;
  margin-left: 4px;
  opacity: 0.3;
}

tbody tr {
  border-bottom: 1px solid var(--border);
  transition: background 0.1s;
}

tbody tr:last-child {
  border-bottom: none;
}

tbody tr:hover {
  background: #F8FAFC;
}

tbody td {
  padding: 12px 16px;
  font-size: 13px;
  vertical-align: middle;
}

tbody tr.unread {
  background: #F0F7FF;
}

tbody tr.unread:hover {
  background: #E6F0FC;
}

/* ─── Chat list ─── */
.chat-link {
  text-decoration: none;
  color: inherit;
  display: block;
}

.chat-title-cell {
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
}

.chat-preview-cell {
  color: var(--text-secondary);
  max-width: 400px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ─── Badge ─── */
.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 600;
  line-height: 1.4;
}

.badge-primary {
  background: #EBF3FD;
  color: var(--primary);
}

.badge-admin {
  background: #FFF0E6;
  color: #E67700;
}

.badge-unread {
  background: var(--primary);
  color: var(--white);
  min-width: 20px;
  text-align: center;
}

.badge-success {
  background: #E6F9ED;
  color: #1B873B;
}

.badge-warning {
  background: #FFF8E6;
  color: #B86E00;
}

/* ─── Alerts ─── */
.alert {
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 13px;
  margin-bottom: 16px;
}

.alert-success {
  background: #E6F9ED;
  border: 1px solid #C6EFCE;
  color: #1B873B;
}

.alert-error {
  background: #FFF0F0;
  border: 1px solid #FECACA;
  color: #CC1818;
}

.alert-info {
  background: #EBF3FD;
  border: 1px solid #B3D4FC;
  color: #1A5FA0;
}

/* ─── Messages (chat) ─── */
.chat-view {
  display: flex;
  flex-direction: column;
  height: calc(100vh - 80px);
}

.messages-area {
  flex: 1;
  overflow-y: auto;
  padding: 16px 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.message {
  max-width: 65%;
  padding: 10px 14px;
  border-radius: 12px;
  font-size: 13px;
}

.msg-in {
  align-self: flex-start;
  background: var(--white);
  border: 1px solid var(--border);
}

.msg-out {
  align-self: flex-end;
  background: var(--primary);
  color: var(--white);
}

.msg-system {
  align-self: center;
  background: var(--bg);
  color: var(--text-secondary);
  font-size: 12px;
  border-radius: 8px;
}

.msg-content {
  word-break: break-word;
  white-space: pre-wrap;
}

.msg-time {
  font-size: 10px;
  opacity: 0.6;
  margin-top: 4px;
  text-align: right;
}

.msg-image {
  max-width: 280px;
  border-radius: 8px;
}

/* ─── Reply section ─── */
.reply-section {
  flex-shrink: 0;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}

.ai-suggestion {
  background: #FFFBE6;
  border: 1px solid #FFE58F;
  border-radius: 8px;
  padding: 12px 16px;
  margin-bottom: 12px;
}

.ai-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
  font-size: 13px;
}

.ai-note {
  font-size: 12px;
  color: var(--text-secondary);
}

.ai-details {
  margin-top: 8px;
}

.ai-details summary {
  cursor: pointer;
  font-size: 12px;
  color: var(--primary);
}

.similar-pair {
  background: var(--white);
  padding: 8px;
  border-radius: 6px;
  margin-top: 6px;
  font-size: 12px;
}

.similar-q { font-weight: 500; }
.similar-a { color: var(--text-secondary); margin-top: 2px; }

.reply-form textarea {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 13px;
  font-family: inherit;
  resize: vertical;
  background: var(--white);
  color: var(--text);
}

.reply-form textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(43, 125, 233, 0.1);
}

.reply-actions {
  display: flex;
  gap: 8px;
  margin-top: 8px;
  justify-content: flex-end;
}

/* ─── Scan log ─── */
.scan-log {
  background: #1A1F2E;
  color: #A8FF78;
  font-family: 'SF Mono', Monaco, Consolas, monospace;
  font-size: 12px;
  padding: 16px;
  border-radius: 8px;
  max-height: 350px;
  overflow-y: auto;
  margin-top: 12px;
  line-height: 1.7;
}

.scan-log div {
  white-space: pre-wrap;
}

/* ─── Login page ─── */
.login-page {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: var(--bg);
}

.login-card {
  background: var(--white);
  padding: 48px;
  border-radius: 16px;
  border: 1px solid var(--border);
  text-align: center;
  max-width: 400px;
  width: 100%;
}

.login-card h1 {
  font-size: 22px;
  margin-bottom: 6px;
}

.login-card .subtitle {
  color: var(--text-secondary);
  margin-bottom: 28px;
  font-size: 14px;
}

.login-card .hint {
  color: var(--text-secondary);
  font-size: 12px;
  margin-top: 16px;
}

.btn-google {
  background: var(--white);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 12px 24px;
  font-size: 14px;
  width: 100%;
  justify-content: center;
  border-radius: 8px;
}

.btn-google:hover {
  background: var(--bg);
  border-color: #D0D8E0;
}

/* ─── Utility ─── */
.text-muted { color: var(--text-secondary); }
.text-sm { font-size: 12px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mb-4 { margin-bottom: 16px; }
.flex { display: flex; }
.gap-3 { gap: 12px; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }

.empty-state {
  text-align: center;
  padding: 48px;
  color: var(--text-secondary);
}

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 28px 0;
}

/* ─── Platform badges ─── */
.platform-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  color: #fff;
  white-space: nowrap;
  letter-spacing: 0.3px;
}

.platform-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
  flex-shrink: 0;
}

.platform-dot-sm {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  display: inline-block;
  margin-right: 2px;
}

.store-label {
  font-size: 11px;
  color: var(--text-secondary);
  margin-top: 2px;
}

/* ─── Filter bar ─── */
.filter-bar {
  display: flex;
  gap: 6px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.filter-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 13px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.15s;
  background: var(--white);
}

.filter-chip:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.filter-chip.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.filter-chip.active .platform-dot {
  background: #fff !important;
}

/* ─── Platform stats ─── */
.platform-stats-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.platform-stat-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
}

/* ─── Scan stores grid ─── */
.scan-stores-grid {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.scan-store-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: var(--bg);
  border-radius: 8px;
  border: 1px solid var(--border);
}

.scan-store-name {
  flex: 1;
  font-size: 13px;
  font-weight: 500;
}

/* ─── Forms (settings) ─── */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.form-group label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-input {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  font-family: inherit;
  background: var(--white);
  color: var(--text);
  transition: border-color 0.15s;
}

.form-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(43, 125, 233, 0.1);
}

select.form-input {
  cursor: pointer;
}