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

:root {
  --bg-primary: #111b21;
  --bg-secondary: #1f2c34;
  --bg-tertiary: #2a3942;
  --bg-hover: #374a54;
  --text-primary: #e9edef;
  --text-secondary: #8696a0;
  --accent: #00a884;
  --accent-hover: #06cf9c;
  --danger: #ea4335;
  --danger-bg: rgba(234, 67, 53, 0.12);
  --border: #2a3942;
  --shadow: rgba(0, 0, 0, 0.3);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  height: 100vh;
  overflow: hidden;
}

.app {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* Header */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 20px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-left h1 {
  font-size: 18px;
  font-weight: 600;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--danger);
  transition: background 0.3s;
}

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

/* Controls */
.controls {
  display: flex;
  gap: 12px;
  padding: 12px 20px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.search-box {
  flex: 1;
  min-width: 200px;
}

.search-box input {
  width: 100%;
  padding: 8px 16px;
  border-radius: 8px;
  border: none;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 14px;
  outline: none;
}

.search-box input::placeholder {
  color: var(--text-secondary);
}

.filters {
  display: flex;
  gap: 8px;
}

.filters select {
  padding: 8px 12px;
  border-radius: 8px;
  border: none;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 13px;
  cursor: pointer;
  outline: none;
}

/* Stats */
.stats {
  display: flex;
  gap: 24px;
  padding: 12px 20px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
}

.stat {
  display: flex;
  align-items: center;
  gap: 8px;
}

.stat-number {
  font-size: 18px;
  font-weight: 700;
  color: var(--accent);
}

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

/* Content Layout */
.content {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* Sidebar */
.sidebar {
  width: 280px;
  min-width: 280px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  overflow-y: auto;
}

.sidebar h3 {
  padding: 16px;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  cursor: pointer;
  border-bottom: 1px solid var(--border);
  transition: background 0.15s;
}

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

.contact-item.active {
  background: var(--bg-tertiary);
  border-left: 3px solid var(--accent);
}

.contact-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 600;
  color: var(--accent);
  flex-shrink: 0;
}

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

.contact-name {
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.contact-meta {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 2px;
}

.badge {
  background: var(--danger);
  color: white;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 10px;
  flex-shrink: 0;
}

/* Main Panel */
.main-panel {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
}

/* Loading */
.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  gap: 16px;
  color: var(--text-secondary);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--bg-tertiary);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Empty State */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  gap: 12px;
  color: var(--text-secondary);
}

.empty-state .sub {
  font-size: 13px;
}

/* Messages */
.date-group {
  margin-bottom: 24px;
}

.date-header {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  padding: 8px 12px;
  background: var(--bg-tertiary);
  border-radius: 6px;
  margin-bottom: 8px;
  display: inline-block;
}

.message-card {
  background: var(--bg-secondary);
  border-radius: 8px;
  padding: 12px 16px;
  margin-bottom: 6px;
  border-left: 3px solid var(--danger);
  transition: background 0.15s;
}

.message-card:hover {
  background: var(--bg-hover);
}

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

.message-phone {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
}

.message-time {
  font-size: 11px;
  color: var(--text-secondary);
}

.message-body {
  font-size: 14px;
  line-height: 1.4;
  color: var(--text-primary);
  word-wrap: break-word;
}

.message-type {
  display: inline-block;
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  margin-top: 6px;
}

.message-deleted-at {
  font-size: 11px;
  color: var(--danger);
  margin-top: 4px;
}

/* All Messages Tab */
.messages-view-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.tab-btn {
  padding: 6px 16px;
  border-radius: 6px;
  border: none;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s;
}

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

.tab-btn:hover:not(.active) {
  background: var(--bg-hover);
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}

/* Responsive */
@media (max-width: 768px) {
  .sidebar {
    width: 100%;
    min-width: 100%;
    max-height: 40vh;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .content {
    flex-direction: column;
  }

  .stats {
    gap: 12px;
  }

  .stat-label {
    display: none;
  }
}

/* Account label in messages */
.message-account {
  display: inline-block;
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 4px;
  background: #6366f1;
  color: white;
  margin-left: 8px;
  font-weight: 500;
}

/* Account filter */
#accountFilter {
  min-width: 150px;
}