/* --- Design Tokens / Core Variables --- */
:root {
  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Sleek Dark Palette */
  --bg-app: #090d16;
  --bg-sidebar: #0f1524;
  --bg-card: #141b2d;
  --bg-card-hover: #1b253b;
  --border-color: #202b42;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dark: #64748b;

  /* Accent Colors */
  --color-primary: #3b82f6;
  --color-primary-hover: #2563eb;
  --color-success: #10b981;
  --color-success-bg: rgba(16, 185, 129, 0.1);
  --color-warning: #f59e0b;
  --color-warning-bg: rgba(245, 158, 11, 0.1);
  --color-danger: #ef4444;
  --color-danger-bg: rgba(239, 68, 68, 0.1);
  --color-purple: #8b5cf6;
  --color-accent: var(--color-primary);
  --text-primary: var(--text-main);

  /* Feedback Toast Colors */
  --color-success-light: rgba(16, 185, 129, 0.15);
  --color-error-light: rgba(239, 68, 68, 0.15);
  --color-warning-light: rgba(245, 158, 11, 0.15);
  --color-info-light: rgba(59, 130, 246, 0.15);
}

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

body {
  background-color: var(--bg-app);
  color: var(--text-main);
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.5;
  overflow: hidden;
  height: 100vh;
}

h1, h2, h3, h4, .sidebar-brand h2 {
  font-family: var(--font-heading);
}

/* --- Layout Grid --- */
.app-container {
  display: flex;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
}

/* --- Sidebar Styling --- */
.sidebar {
  width: 260px;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  padding: 24px;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 40px;
}

.brand-logo {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-purple));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 18px;
}

.sidebar-brand h2 {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

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

.nav-item {
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  text-align: left;
  padding: 12px 16px;
  border-radius: 10px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: all 0.2s ease-in-out;
}

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

.nav-item.active {
  color: #fff;
  background: linear-gradient(90deg, rgba(59, 130, 246, 0.15) 0%, rgba(59, 130, 246, 0) 100%);
  border-left: 3px solid var(--color-primary);
  border-radius: 0 10px 10px 0;
}

.sidebar-footer {
  color: var(--text-dark);
  font-size: 12px;
  text-align: center;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

/* --- Main Content Layout --- */
.main-content {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  padding: 30px;
}

.main-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}

.main-header h1 {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.header-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 500;
  font-size: 13px;
  padding: 8px 16px;
  border-radius: 30px;
  background-color: var(--bg-sidebar);
  border: 1px solid var(--border-color);
}

.status-indicator {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

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

/* --- Tab Panels Configuration --- */
.tab-panel {
  display: none;
  animation: fadeIn 0.3s ease-in-out;
}

.tab-panel.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- Stat Cards Grid --- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.stat-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: transform 0.2s, border-color 0.2s;
}

.stat-card:hover {
  transform: translateY(-2px);
  border-color: #3b82f655;
}

.stat-icon {
  width: 50px;
  height: 50px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
}

.bg-blue { background-color: rgba(59, 130, 246, 0.15); color: var(--color-primary); }
.bg-green { background-color: rgba(16, 185, 129, 0.15); color: var(--color-success); }
.bg-purple { background-color: rgba(139, 92, 246, 0.15); color: var(--color-purple); }
.bg-red { background-color: rgba(239, 68, 68, 0.15); color: var(--color-danger); }
.bg-yellow { background-color: rgba(245, 158, 11, 0.15); color: var(--color-warning); }

.stat-content h3 {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 500;
}

.stat-content p {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 700;
  margin-top: 4px;
}

/* --- Card Styles --- */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 24px;
  margin-bottom: 24px;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.card-header h2 {
  font-size: 18px;
  font-weight: 600;
}

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.col-2 {
  grid-column: span 2;
}

/* --- Buttons --- */
.btn {
  background-color: var(--color-primary);
  color: #fff;
  border: none;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.2s;
}

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

.btn-outline {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
}

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

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

.sync-btn {
  margin-left: 12px;
  padding: 4px 12px;
  font-size: 12px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background: var(--bg-card);
  color: var(--text-light);
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s;
}
.sync-btn:hover {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.sync-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}
.sync-btn.syncing {
  animation: pulse 1s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

/* --- Table Styling --- */
.table-container {
  overflow-x: auto;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

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

th, td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-color);
}

th {
  background-color: var(--bg-sidebar);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

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

tr:hover td {
  background-color: rgba(255, 255, 255, 0.02);
}

.loading {
  text-align: center;
  color: var(--text-muted);
  padding: 30px;
  font-style: italic;
}

/* --- Badges & Statuses --- */
.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 30px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
}

.badge-success { background-color: var(--color-success-bg); color: var(--color-success); }
.badge-warning { background-color: var(--color-warning-bg); color: var(--color-warning); }
.badge-danger { background-color: var(--color-danger-bg); color: var(--color-danger); }
.badge-neutral { background-color: rgba(255, 255, 255, 0.05); color: var(--text-muted); }

/* --- Diagnostic List --- */
.diagnostic-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.diagnostic-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

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

.diagnostic-label {
  color: var(--text-muted);
  font-weight: 500;
}

/* --- Chats Layout split --- */
.chats-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 24px;
  height: calc(100vh - 180px);
  overflow: hidden;
}

.chat-sessions-card, .chat-viewer-card {
  height: 100%;
  display: flex;
  flex-direction: column;
  padding: 20px;
  margin-bottom: 0;
  min-height: 0; /* Prevents flex children from expanding beyond the parent grid */
}

.chat-sessions-list {
  overflow-y: auto;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 0; /* Prevents list from overflowing */
}

.chat-session-item {
  background-color: var(--bg-sidebar);
  border: 1px solid var(--border-color);
  padding: 14px;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.2s;
}

.chat-session-item:hover, .chat-session-item.active {
  border-color: var(--color-primary);
  background-color: var(--bg-card-hover);
}

.chat-session-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2px;
}

.chat-name-text {
  font-weight: 600;
  font-size: 13px;
  color: var(--text-light);
}

.chat-id-sub {
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chat-id-text {
  font-weight: 600;
  font-size: 13px;
}

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

.chat-preview-text {
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* --- Chat Messages Viewer --- */
.chat-messages-container {
  flex-grow: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 12px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-sidebar);
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 0;
  /* Prevent any child from forcing horizontal scroll */
  max-width: 100%;
  box-sizing: border-box;
}

.chat-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  text-align: center;
  color: var(--text-muted);
  gap: 16px;
}

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

.chat-bubble {
  max-width: 80%;
  padding: 10px 14px;
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  animation: fadeInBubble 0.2s ease-in-out;
  word-break: break-word;
  overflow-wrap: break-word;
  line-height: 1.5;
}

@keyframes fadeInBubble {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.chat-bubble.user {
  background-color: var(--color-primary);
  color: #fff;
  align-self: flex-end;
  border-bottom-right-radius: 2px;
  margin-left: auto;
}

.chat-bubble.model {
  background-color: var(--bg-card);
  color: var(--text-main);
  align-self: flex-start;
  border-bottom-left-radius: 2px;
  border: 1px solid var(--border-color);
  margin-right: auto;
}

.chat-bubble.function {
  background-color: rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
  font-family: monospace;
  font-size: 11px;
  align-self: center;
  max-width: 90%;
  border-radius: 8px;
  border: 1px dashed var(--border-color);
}

.bubble-meta {
  font-size: 10px;
  margin-top: 4px;
  opacity: 0.5;
  text-align: right;
  letter-spacing: 0.3px;
}

.bubble-content {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
}

/* Ensure links inside bubbles also wrap */
.bubble-content a {
  overflow-wrap: anywhere;
  word-break: break-all;
}

/* --- WhatsApp-like formatting inside bubbles --- */
.bubble-content a {
  color: inherit;
  text-decoration: underline;
  opacity: 0.9;
}
.bubble-content a:hover {
  opacity: 1;
}
.chat-bubble.user .bubble-content a {
  color: #fff;
}
.chat-bubble.model .bubble-content a {
  color: #60a5fa;
}

.bubble-content strong {
  font-weight: 700;
}
.bubble-content em {
  font-style: italic;
}
.bubble-content s {
  text-decoration: line-through;
}
.bubble-content code {
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 0.9em;
  background-color: rgba(255,255,255,0.08);
  padding: 1px 5px;
  border-radius: 4px;
}
.chat-bubble.user .bubble-content code {
  background-color: rgba(255,255,255,0.15);
}

/* Settings Grid Layout (used in Channel Management) */
.settings-grid {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

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

::-webkit-scrollbar-track {
  background: var(--bg-app);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 10px;
}

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

/* Toggle Switch Premium Style */
.switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 22px;
}

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

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--border-color);
  transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 34px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 16px;
  width: 16px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 50%;
  box-shadow: 0 1px 3px rgba(0,0,0,0.15);
}

input:checked + .slider {
  background-color: #10b981; /* Emerald green when active */
}

input:checked + .slider:before {
  transform: translateX(22px);
}

/* Chat Input Styling */
.chat-input-area input:focus {
  outline: none;
  border-color: #10b981 !important;
  box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.15);
}