/* ================================================================
 * MrPotter CRM Dashboard — Stylesheet
 * ================================================================ */

/* === CSS Variables / Theming === */
:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-input: #f8fafc;
  --text-primary: #0f172a;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-light: rgba(99, 102, 241, 0.1);
  --success: #10b981;
  --success-light: rgba(16, 185, 129, 0.1);
  --warning: #f59e0b;
  --warning-light: rgba(245, 158, 11, 0.1);
  --danger: #ef4444;
  --danger-light: rgba(239, 68, 68, 0.1);
  --info: #3b82f6;
  --info-light: rgba(59, 130, 246, 0.1);
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
  --radius: 12px;
  --radius-sm: 8px;
  --sidebar-width: 260px;
  --topbar-height: 64px;
  --chat-customer: #f1f5f9;
  --chat-ai: #ede9fe;
  --chat-agent: #6366f1;
  --chat-agent-text: #ffffff;
}

[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-card: #1e293b;
  --bg-input: #334155;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border: #334155;
  --border-light: #1e293b;
  --primary: #818cf8;
  --primary-hover: #6366f1;
  --primary-light: rgba(129, 140, 248, 0.15);
  --success-light: rgba(16, 185, 129, 0.15);
  --warning-light: rgba(245, 158, 11, 0.15);
  --danger-light: rgba(239, 68, 68, 0.15);
  --info-light: rgba(59, 130, 246, 0.15);
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
  --shadow: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.3);
  --chat-customer: #334155;
  --chat-ai: #312e81;
  --chat-agent: #6366f1;
}

/* === Reset === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow: hidden;
  height: 100vh;
}

a { color: var(--primary); text-decoration: none; }

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

.login-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 48px 40px;
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
}

.login-logo {
  text-align: center;
  margin-bottom: 32px;
}

.login-logo i {
  font-size: 48px;
  color: var(--primary);
  margin-bottom: 12px;
}

.login-logo h1 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
}

.login-logo p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-top: 4px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  color: var(--text-primary);
  font-size: 14px;
  font-family: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

.error-msg {
  color: var(--danger);
  font-size: 13px;
  margin-bottom: 12px;
  padding: 8px 12px;
  background: var(--danger-light);
  border-radius: var(--radius-sm);
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.btn:disabled { opacity: 0.5; cursor: not-allowed; }

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

.btn-success { background: var(--success); color: #fff; }
.btn-success:hover:not(:disabled) { opacity: 0.9; }

.btn-warning { background: var(--warning); color: #fff; }
.btn-warning:hover:not(:disabled) { opacity: 0.9; }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover:not(:disabled) { opacity: 0.9; }

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.btn-ghost:hover { background: var(--bg-secondary); color: var(--text-primary); }

.btn-sm { padding: 6px 12px; font-size: 12px; }

.btn-block { width: 100%; }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
  font-size: 16px;
}
.icon-btn:hover { background: var(--bg-secondary); color: var(--text-primary); }

/* === Layout === */
#main-app {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* === Sidebar === */
.sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  height: 100vh;
  background: var(--bg-card);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  transition: transform 0.3s;
  z-index: 100;
}

.sidebar-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 20px;
  border-bottom: 1px solid var(--border);
}

.sidebar-header i {
  font-size: 24px;
  color: var(--primary);
}

.sidebar-title {
  font-size: 18px;
  font-weight: 700;
}

.sidebar-toggle-mobile {
  display: none;
  margin-left: auto;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 18px;
  cursor: pointer;
}

.sidebar-nav {
  flex: 1;
  padding: 12px;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s;
  margin-bottom: 4px;
  position: relative;
}

.nav-item:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.nav-item.active {
  background: var(--primary-light);
  color: var(--primary);
}

.nav-item i { width: 20px; text-align: center; }

.nav-badge {
  margin-left: auto;
  background: var(--danger);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 10px;
  min-width: 20px;
  text-align: center;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}

.user-name { font-size: 13px; font-weight: 600; }
.user-role { font-size: 11px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; }

.sidebar-actions {
  display: flex;
  gap: 4px;
}

/* === Main Content === */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}

.top-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 24px;
  height: var(--topbar-height);
  min-height: var(--topbar-height);
  border-bottom: 1px solid var(--border);
  background: var(--bg-card);
}

.top-bar h2 {
  font-size: 18px;
  font-weight: 600;
  flex: 1;
}

.menu-btn { display: none; }

.connection-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text-muted);
}
.connection-dot.connected { background: var(--success); }

.page-content {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
}

/* === Stats Cards === */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}

.stat-icon.primary { background: var(--primary-light); color: var(--primary); }
.stat-icon.success { background: var(--success-light); color: var(--success); }
.stat-icon.warning { background: var(--warning-light); color: var(--warning); }
.stat-icon.info { background: var(--info-light); color: var(--info); }

.stat-value {
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 12px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 500;
}

/* === Charts === */
.charts-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

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

.chart-card h3 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.chart-card canvas {
  width: 100% !important;
  max-height: 250px;
}

/* === Table === */
.table-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.table-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.table-header h3 {
  font-size: 16px;
  font-weight: 600;
  margin-right: auto;
}

.search-input {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
}

.search-input i { color: var(--text-muted); font-size: 14px; }

.search-input input {
  border: none;
  background: none;
  color: var(--text-primary);
  font-size: 13px;
  outline: none;
  width: 180px;
  font-family: inherit;
}

.filter-tabs {
  display: flex;
  gap: 4px;
}

.filter-tab {
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}

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

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

th, td {
  padding: 12px 20px;
  text-align: left;
  font-size: 13px;
  border-bottom: 1px solid var(--border-light);
}

th {
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: 0.5px;
  background: var(--bg-secondary);
}

tr:hover td { background: var(--bg-secondary); }

.table-empty {
  padding: 48px 20px;
  text-align: center;
  color: var(--text-muted);
}

.table-empty i {
  font-size: 48px;
  margin-bottom: 12px;
  display: block;
}

/* === Badges === */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-ai { background: var(--info-light); color: var(--info); }
.badge-human { background: var(--warning-light); color: var(--warning); }
.badge-closed { background: var(--bg-secondary); color: var(--text-muted); }

.badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

/* === Session List Cards === */
.sessions-list {
  display: flex;
  flex-direction: column;
}

.session-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border-light);
  gap: 12px;
  transition: background 0.15s;
}

.session-row:hover { background: var(--bg-secondary); }

.session-row-left {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
  min-width: 0;
}

.session-avatar {
  width: 40px;
  height: 40px;
  min-width: 40px;
  border-radius: 50%;
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  position: relative;
}

.status-dot {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid var(--bg-card);
}

.dot-ai { background: var(--info); }
.dot-human { background: var(--warning); }
.dot-closed { background: var(--text-muted); }

.session-info { min-width: 0; flex: 1; }

.session-name {
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.session-channel {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 400;
  margin-left: 6px;
}

.session-preview {
  font-size: 12px;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 2px;
}

.session-row-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
  min-width: 90px;
}

.session-time { font-size: 11px; color: var(--text-muted); }
.session-meta { font-size: 10px; color: var(--text-muted); }

/* === Chat Layout (Split View) === */
.chat-layout {
  display: flex;
  height: calc(100vh - var(--topbar-height) - 48px);
  gap: 0;
}

.chat-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.chat-top-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 0;
  flex-wrap: wrap;
}

.chat-action-btns {
  display: flex;
  gap: 6px;
  margin-left: auto;
}

.chat-sidebar {
  width: 300px;
  min-width: 300px;
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  overflow-y: auto;
}

.sidebar-panel-toggle {
  display: none;
}

.panel-content {
  padding: 16px;
  overflow-y: auto;
  flex: 1;
}

/* Customer Info Panel */
.customer-info-panel {
  margin-bottom: 20px;
}

.customer-info-panel h4 {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}

.info-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid var(--border-light);
  font-size: 13px;
  gap: 8px;
}

.info-label {
  color: var(--text-muted);
  font-size: 12px;
  white-space: nowrap;
}

.info-value {
  color: var(--text-primary);
  font-weight: 500;
  text-align: right;
  word-break: break-all;
}

.session-id-code {
  font-size: 10px;
  background: var(--bg-secondary);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: monospace;
}

/* Notes Panel */
.notes-panel h4 {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}

.note-card {
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  margin-bottom: 8px;
  font-size: 13px;
}

.note-text {
  line-height: 1.5;
  margin-bottom: 4px;
}

.note-meta {
  font-size: 10px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
}

.note-delete {
  background: none;
  border: none;
  color: var(--danger);
  cursor: pointer;
  font-size: 10px;
  padding: 2px;
  margin-left: auto;
}

.note-input {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.note-input textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  color: var(--text-primary);
  font-size: 13px;
  font-family: inherit;
  padding: 8px 10px;
  resize: none;
  outline: none;
}

.note-input textarea:focus {
  border-color: var(--primary);
}

/* Chat Messages */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 8px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.msg-bubble {
  max-width: 75%;
  padding: 10px 14px;
  border-radius: 16px;
  font-size: 14px;
  line-height: 1.5;
  position: relative;
  word-break: break-word;
}

.msg-text { white-space: pre-wrap; }

.msg-customer {
  align-self: flex-start;
  background: var(--chat-customer);
  color: var(--text-primary);
  border-bottom-left-radius: 4px;
}

.msg-ai {
  align-self: flex-start;
  background: var(--chat-ai);
  color: var(--text-primary);
  border-bottom-left-radius: 4px;
}

.msg-agent {
  align-self: flex-end;
  background: var(--chat-agent);
  color: var(--chat-agent-text);
  border-bottom-right-radius: 4px;
}

.msg-meta {
  font-size: 10px;
  color: var(--text-muted);
  margin-top: 4px;
}

.msg-agent .msg-meta { color: rgba(255,255,255,0.7); }

.msg-system {
  align-self: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 12px;
  padding: 6px 16px;
  border-radius: 20px;
  text-align: center;
}

.chat-input-bar {
  display: flex;
  gap: 8px;
  padding: 10px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.chat-input-bar textarea {
  flex: 1;
  border: none;
  background: var(--bg-input);
  color: var(--text-primary);
  font-size: 14px;
  font-family: inherit;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  resize: none;
  min-height: 44px;
  max-height: 120px;
  outline: none;
}

/* === Knowledge Base Cards === */
.kb-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 16px;
}

.kb-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  transition: box-shadow 0.2s;
}

.kb-card:hover { box-shadow: var(--shadow); }

.kb-card-header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  margin-bottom: 12px;
}

.kb-category {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--primary);
  background: var(--primary-light);
  padding: 2px 8px;
  border-radius: 4px;
}

.kb-card h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 8px;
}

.kb-card p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.kb-card-footer {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border-light);
}

.kb-priority {
  font-size: 11px;
  color: var(--text-muted);
}

.kb-status {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 10px;
}

.kb-status.active { background: var(--success-light); color: var(--success); }
.kb-status.inactive { background: var(--danger-light); color: var(--danger); }

/* === Modal === */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(4px);
}

.modal {
  background: var(--bg-card);
  border-radius: var(--radius);
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}

.modal-header h3 { font-size: 16px; font-weight: 600; }

.modal-body { padding: 24px; }

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 16px 24px;
  border-top: 1px solid var(--border);
}

/* === Toast === */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  color: #fff;
  box-shadow: var(--shadow-lg);
  animation: toastIn 0.3s ease;
  max-width: 360px;
}

.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }
.toast.info { background: var(--info); }

@keyframes toastIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* === Pagination === */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 16px 20px;
  border-top: 1px solid var(--border-light);
}

.pagination button {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-secondary);
  font-size: 12px;
  cursor: pointer;
  font-family: inherit;
}

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

.pagination button:disabled { opacity: 0.3; cursor: not-allowed; }

/* === Responsive === */
@media (max-width: 1024px) {
  .chat-sidebar {
    width: 260px;
    min-width: 260px;
  }
}

@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    transform: translateX(-100%);
  }

  .sidebar.open { transform: translateX(0); }
  .sidebar-toggle-mobile { display: block; }
  .menu-btn { display: flex; }

  .page-content { padding: 12px; }
  .charts-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .table-header { flex-direction: column; align-items: stretch; }
  .kb-grid { grid-template-columns: 1fr; }
  .hide-mobile { display: none !important; }

  /* Chat mobile layout */
  .chat-layout { flex-direction: column; height: calc(100vh - var(--topbar-height) - 24px); }

  .chat-sidebar {
    width: 100%;
    min-width: 100%;
    border-left: none;
    border-top: 1px solid var(--border);
    max-height: none;
    overflow: visible;
  }

  .sidebar-panel-toggle { display: flex !important; margin: 8px 16px; }
  .panel-content { display: none; }
  .panel-content.panel-open { display: block; }
  .chat-sidebar.panel-expanded { flex: 0 0 auto; }

  .msg-bubble { max-width: 85%; }

  .chat-top-actions { padding: 6px 0; }
  .chat-action-btns { margin-left: auto; }
  .chat-action-btns .btn { padding: 6px 8px; font-size: 11px; }

  .session-row { padding: 10px 12px; }
  .session-row-right { min-width: 70px; }

  /* Modal mobile */
  .modal { max-width: 95vw; margin: 12px; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .stat-card { padding: 14px; }
  .stat-value { font-size: 22px; }
  .filter-tabs { flex-wrap: wrap; }
  .chat-action-btns { flex-wrap: wrap; }
}

/* === Scrollbar === */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* === Utilities === */
/* === Dashboard Filters === */
.dash-filters {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.date-range-picker {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.date-range-picker label {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
}

.date-range-picker input[type="date"] {
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  color: var(--text-primary);
  font-size: 13px;
  font-family: inherit;
}

.date-range-picker input[type="date"]:focus {
  outline: none;
  border-color: var(--primary);
}

.quick-filters {
  display: flex;
  gap: 4px;
  margin-left: auto;
}

.stat-icon.closed { background: var(--bg-secondary); color: var(--text-muted); }

.clickable { cursor: pointer; }
.text-truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.text-muted { color: var(--text-muted); }
.text-small { font-size: 12px; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mb-16 { margin-bottom: 16px; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-8 { gap: 8px; }