:root {
  --bg: #FAFAFA;
  --card: #FFFFFF;
  --accent: #007AFF;
  --accent-hover: #0056CC;
  --text: #1D1D1F;
  --text-secondary: #86868B;
  --border: #E5E5EA;
  --shadow: 0 2px 12px rgba(0,0,0,0.08);
  --radius-card: 12px;
  --radius-btn: 8px;
  --transition: 0.2s ease;
  --success: #34C759;
  --warning: #FF9500;
  --danger: #FF3B30;
}

[data-theme="dark"] {
  --bg: #000000;
  --card: #1C1C1E;
  --accent: #0A84FF;
  --accent-hover: #409CFF;
  --text: #F5F5F7;
  --text-secondary: #98989D;
  --border: #38383A;
  --shadow: 0 2px 12px rgba(0,0,0,0.3);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
  transition: background var(--transition), color var(--transition);
}

#app {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 260px;
  background: var(--card);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 20px 0;
  position: fixed;
  right: 0;
  top: 0;
  bottom: 0;
  z-index: 100;
  transition: background var(--transition), border var(--transition);
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 24px 24px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}

.logo-icon {
  font-size: 28px;
}

.logo-text {
  font-size: 22px;
  font-weight: 600;
  color: var(--text);
}

.nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 0 12px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius-btn);
  color: var(--text);
  text-decoration: none;
  transition: background var(--transition);
  position: relative;
}

.nav-item:hover {
  background: var(--bg);
}

.nav-item.active {
  background: var(--accent);
  color: white;
}

.nav-icon {
  font-size: 18px;
  width: 24px;
  text-align: center;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-secondary);
  margin-right: auto;
  margin-left: 8px;
}

.status-dot.connected {
  background: var(--success);
}

.status-dot.connecting {
  background: var(--warning);
  animation: pulse 1s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.badge {
  background: var(--danger);
  color: white;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 10px;
  margin-right: auto;
  margin-left: 8px;
}

.sidebar-footer {
  padding: 16px 24px 0;
  border-top: 1px solid var(--border);
}

.theme-toggle {
  width: 100%;
  padding: 12px;
  border: none;
  background: var(--bg);
  border-radius: var(--radius-btn);
  cursor: pointer;
  font-size: 18px;
  transition: background var(--transition);
}

.theme-toggle:hover {
  background: var(--border);
}

.main {
  flex: 1;
  margin-right: 260px;
  padding: 32px;
  min-height: 100vh;
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.page-title {
  font-size: 28px;
  font-weight: 600;
}

.card {
  background: var(--card);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 16px;
  transition: background var(--transition), box-shadow var(--transition);
}

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

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius-btn);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

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

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

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

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

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

.btn-danger:hover {
  background: #E5342A;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 13px;
}

.btn-icon {
  padding: 8px;
  min-width: 36px;
  justify-content: center;
}

.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  margin-bottom: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-btn);
  font-size: 15px;
  background: var(--bg);
  color: var(--text);
  transition: border var(--transition), background var(--transition);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.form-textarea {
  min-height: 100px;
  resize: vertical;
}

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

.table th,
.table td {
  padding: 12px 16px;
  text-align: right;
  border-bottom: 1px solid var(--border);
}

.table th {
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 13px;
  text-transform: uppercase;
}

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

.table-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-start;
}

.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-secondary);
}

.empty-icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.empty-text {
  font-size: 16px;
}

.qr-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 32px;
}

.qr-image {
  width: 280px;
  height: 280px;
  border-radius: var(--radius-card);
  background: white;
  padding: 16px;
}

.qr-status {
  margin-top: 16px;
  font-size: 15px;
  color: var(--text-secondary);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
}

.status-badge.confirmed {
  background: rgba(52, 199, 89, 0.15);
  color: var(--success);
}

.status-badge.done {
  background: rgba(0, 122, 255, 0.15);
  color: var(--accent);
}

.status-badge.cancelled {
  background: rgba(255, 59, 48, 0.15);
  color: var(--danger);
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--card);
  border-radius: var(--radius-card);
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.95);
  transition: transform var(--transition);
}

.modal-overlay.active .modal {
  transform: scale(1);
}

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

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

.modal-close {
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--text-secondary);
  padding: 4px;
}

.modal-body {
  padding: 24px;
}

.modal-footer {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  padding: 16px 24px;
  border-top: 1px solid var(--border);
}

.connected-info {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 24px;
}

.connected-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--success);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
}

.connected-details h3 {
  font-size: 18px;
  margin-bottom: 4px;
}

.connected-details p {
  color: var(--text-secondary);
  font-size: 14px;
}

.message-item {
  display: flex;
  gap: 12px;
  padding: 16px;
  border-bottom: 1px solid var(--border);
}

.message-item:last-child {
  border-bottom: none;
}

.message-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 600;
  flex-shrink: 0;
}

.message-content {
  flex: 1;
  min-width: 0;
}

.message-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
}

.message-phone {
  font-weight: 600;
  font-size: 14px;
}

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

.message-direction {
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--bg);
}

.message-direction.in {
  color: var(--success);
}

.message-direction.out {
  color: var(--accent);
}

.message-body {
  font-size: 14px;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

@media (max-width: 768px) {
  .sidebar {
    width: 100%;
    height: auto;
    position: relative;
    right: auto;
    border-left: none;
    border-bottom: 1px solid var(--border);
  }

  .main {
    margin-right: 0;
  }

  #app {
    flex-direction: column;
  }

  .nav {
    flex-direction: row;
    overflow-x: auto;
    padding: 8px;
  }

  .nav-item span:not(.nav-icon):not(.badge):not(.status-dot) {
    display: none;
  }

  .grid-2 {
    grid-template-columns: 1fr;
  }
}