:root {
  /* VS Code Dark Theme */
  --bg-main: #1e1e1e;
  --bg-sidebar: #252526;
  --bg-card: #2d2d30;
  --bg-card-hover: #3e3e42;
  --border-color: #454545;
  
  --primary: #007acc;
  --primary-hover: #0098ff;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #3b82f6;

  --text-main: #cccccc;
  --text-muted: #858585;
  --text-sub: #d4d4d4;

  --sidebar-width: 260px;
  --header-height: 80px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;

  --shadow-glow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
  /* WhatsApp Light Theme */
  --bg-main: #eefeeb;
  --bg-sidebar: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f5f6f6;
  --border-color: #d1d7db;
  
  --primary: #00a884;
  --primary-hover: #008f6f;
  
  --text-main: #111b21;
  --text-muted: #667781;
  --text-sub: #3b4a54;
  
  --shadow-glow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

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

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-main);
  color: var(--text-main);
  min-height: 100vh;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

h1, h2, h3, h4, h5 {
  font-family: 'Outfit', sans-serif;
}

/* App Layout Structure */
.app-container {
  display: flex;
  min-height: 100vh;
}

/* Sidebar Styling */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  padding: 24px 16px;
  position: fixed;
  height: 100vh;
  z-index: 100;
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 24px;
}

.brand-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, #25d366, #128c7e);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: white;
  box-shadow: 0 4px 14px rgba(37, 211, 102, 0.4);
}

.brand-text h2 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.brand-text span {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.nav-menu {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
}

.nav-item i {
  font-size: 18px;
  width: 20px;
  text-align: center;
}

.nav-item:hover, .nav-item.active {
  color: var(--text-main);
  background: rgba(99, 102, 241, 0.15);
  border-left: 3px solid var(--primary);
}

.nav-item .badge {
  margin-left: auto;
  background: var(--primary);
  color: white;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 12px;
  font-weight: 600;
}

/* Top Navbar */
.top-nav {
  display: flex;
  align-items: center;
  gap: 20px;
  margin: 0 30px;
}

.top-nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 15px;
  font-weight: 600;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 8px;
}

.top-nav-link:hover, .top-nav-link.active {
  color: var(--text-main);
  background: rgba(99, 102, 241, 0.15);
}

.top-nav-link.active {
  border-bottom: 2px solid var(--primary);
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
}

/* Sidebar WA Quick Card */
.sidebar-wa-card {
  margin-top: auto;
  background: rgba(30, 41, 59, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.wa-status-indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.wa-status-indicator.online {
  background: var(--success);
  box-shadow: 0 0 10px var(--success);
}

.wa-status-indicator.offline {
  background: var(--danger);
}

.wa-status-indicator.qr {
  background: var(--warning);
  animation: blink 1.5s infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.wa-status-info strong {
  display: block;
  font-size: 13px;
}

.wa-status-info span {
  font-size: 11px;
  color: var(--text-muted);
}

/* Main Content Area */
.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  padding: 32px;
  max-width: calc(100vw - var(--sidebar-width));
}

/* Top Header */
.top-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
}

.header-title h1 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 4px;
}

.header-title p {
  color: var(--text-muted);
  font-size: 14px;
}

.header-actions {
  display: flex;
  gap: 12px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-hover));
  color: white;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
}

.btn-link {
  background: none;
  border: none;
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}

.btn-link:hover {
  text-decoration: underline;
}

/* Tab Contents */
.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Cards & Glassmorphism */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-glow);
  margin-bottom: 24px;
}

.card-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
}

.card-header.space-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.card-title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 4px;
}

.card-title i {
  color: var(--primary);
  font-size: 18px;
}

.card-title h3 {
  font-size: 18px;
  font-weight: 600;
}

.card-body {
  padding: 24px;
}

/* Metrics Grid */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 28px;
}

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

.metric-card:hover {
  transform: translateY(-4px);
  background: var(--bg-card-hover);
}

.metric-icon {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
}

.metric-icon.total { background: rgba(99, 102, 241, 0.15); color: var(--primary); }
.metric-icon.new { background: rgba(245, 158, 11, 0.15); color: var(--warning); }
.metric-icon.contacted { background: rgba(59, 130, 246, 0.15); color: var(--info); }
.metric-icon.closed { background: rgba(16, 185, 129, 0.15); color: var(--success); }

.metric-data .label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.metric-data h3 {
  font-size: 26px;
  font-weight: 700;
  margin-top: 2px;
}

/* Layout Flex Rows */
.dashboard-row {
  display: flex;
  gap: 24px;
}

.flex-1 { flex: 1; }
.flex-2 { flex: 2; }

/* Table Styling */
.table-responsive {
  width: 100%;
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.data-table th {
  padding: 14px 16px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
  letter-spacing: 0.5px;
}

.data-table td {
  padding: 16px;
  font-size: 14px;
  border-bottom: 1px solid var(--border-color);
  vertical-align: middle;
}

.data-table tbody tr {
  transition: var(--transition);
}

.data-table tbody tr:hover {
  background: rgba(255, 255, 255, 0.03);
}

/* Status Badges */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

.status-badge.new { background: rgba(245, 158, 11, 0.15); color: var(--warning); border: 1px solid rgba(245, 158, 11, 0.3); }
.status-badge.contacted { background: rgba(59, 130, 246, 0.15); color: var(--info); border: 1px solid rgba(59, 130, 246, 0.3); }
.status-badge.progress { background: rgba(168, 85, 247, 0.15); color: #a855f7; border: 1px solid rgba(168, 85, 247, 0.3); }
.status-badge.closed { background: rgba(16, 185, 129, 0.15); color: var(--success); border: 1px solid rgba(16, 185, 129, 0.3); }
.status-badge.synced { background: rgba(16, 185, 129, 0.15); color: var(--success); }

/* Status Select Dropdown inside Table */
.status-select {
  background: rgba(15, 23, 42, 0.8);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 13px;
  cursor: pointer;
}

/* Direct WA Chat Button */
.btn-wa-chat {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #25d366;
  color: white;
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  transition: var(--transition);
}

.btn-wa-chat:hover {
  background: #128c7e;
  transform: scale(1.04);
}

/* Filter Controls */
.filter-controls {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.search-box {
  position: relative;
  display: flex;
  align-items: center;
}

.search-box i {
  position: absolute;
  left: 12px;
  color: var(--text-muted);
}

.search-box input {
  padding: 8px 12px 8px 36px;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-size: 14px;
  width: 240px;
}

select {
  padding: 8px 12px;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-size: 14px;
  cursor: pointer;
}

/* Mini Group List */
.mini-group-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mini-group-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: rgba(15, 23, 42, 0.4);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
}

/* Groups Grid */
.groups-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.group-card {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Toggle Switch */
.switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: rgba(255, 255, 255, 0.2);
  transition: .3s;
  border-radius: 24px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: .3s;
  border-radius: 50%;
}

input:checked + .slider {
  background-color: var(--success);
}

input:checked + .slider:before {
  transform: translateX(20px);
}

/* Keywords Tags */
.add-keyword-bar {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
}

.add-keyword-bar input {
  flex: 1;
  padding: 10px 16px;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
}

.keywords-tags-container {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: 20px;
  font-size: 13px;
  color: var(--text-main);
}

.tag i {
  cursor: pointer;
  color: var(--text-muted);
}

.tag i:hover {
  color: var(--danger);
}

/* QR Code Section */
.qr-container {
  width: 260px;
  height: 260px;
  margin: 20px auto;
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: white;
  padding: 12px;
}

.qr-container img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.qr-placeholder {
  color: #334155;
  text-align: center;
}

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

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 8px;
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
}

.form-help {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
  display: block;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 1000;
}

.toast {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--primary);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  gap: 12px;
  animation: slideIn 0.3s ease;
  max-width: 360px;
}

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}