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

:root {
  --bg-dark: #0d1117;
  --bg-card: #161b22;
  --bg-hover: #21262d;
  --border: #30363d;
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --accent: #7c3aed;
  --accent-hover: #8b5cf6;
  --success: #3fb950;
  --warning: #d29922;
  --danger: #f85149;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  min-height: 100vh;
}

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

/* Sidebar */
.sidebar {
  width: 240px;
  background: var(--bg-card);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  height: 100vh;
}

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

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--accent), #a855f7);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 18px;
}

.logo-text {
  font-size: 18px;
  font-weight: 600;
}

.nav {
  flex: 1;
  padding: 16px 12px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: 8px;
  margin-bottom: 4px;
  transition: all 0.2s;
}

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

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

.nav-icon {
  font-size: 14px;
}

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

.status-indicator {
  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(--text-secondary);
}

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

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

/* Main Content */
.main {
  flex: 1;
  margin-left: 240px;
  padding: 32px;
}

.page {
  display: none;
}

.page.active {
  display: block;
}

h1 {
  font-size: 28px;
  font-weight: 600;
  margin-bottom: 24px;
}

h2 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 16px;
}

h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-secondary);
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}

.stat-card.large {
  padding: 24px;
}

.stat-card.highlight {
  border-color: var(--accent);
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.1), rgba(168, 85, 247, 0.05));
}

.stat-label {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-value {
  font-size: 24px;
  font-weight: 600;
}

.stat-card.large .stat-value {
  font-size: 32px;
}

/* Buttons */
.btn {
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

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

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

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

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

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

.btn-danger:hover {
  background: #da3633;
}

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

/* Terminal */
.terminal-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.terminal-output {
  height: 500px;
  overflow-y: auto;
  padding: 16px;
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  font-size: 13px;
  line-height: 1.6;
}

.terminal-line {
  margin-bottom: 4px;
}

.terminal-line.system {
  color: var(--text-secondary);
}

.terminal-line.user {
  color: var(--accent);
}

.terminal-line.user::before {
  content: '> ';
  color: var(--success);
}

.terminal-line.response {
  color: var(--text-primary);
  padding-left: 16px;
  border-left: 2px solid var(--accent);
  margin-left: 8px;
}

.terminal-line.error {
  color: var(--danger);
}

.terminal-input-container {
  display: flex;
  gap: 12px;
  padding: 16px;
  border-top: 1px solid var(--border);
  background: var(--bg-hover);
  align-items: center;
}

.terminal-input-container label {
  font-size: 13px;
  color: var(--text-secondary);
}

.terminal-input-container input[type="text"] {
  flex: 1;
  padding: 10px 14px;
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 14px;
}

.terminal-input-container input#chatIdInput {
  width: 120px;
  flex: none;
}

.terminal-input-container input:focus {
  outline: none;
  border-color: var(--accent);
}

/* Conversations */
.conversations-list {
  display: grid;
  gap: 12px;
}

.conv-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  cursor: pointer;
  transition: all 0.2s;
}

.conv-card:hover {
  border-color: var(--accent);
}

.conv-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.conv-id {
  font-weight: 600;
}

.conv-count {
  font-size: 13px;
  color: var(--text-secondary);
}

.conv-preview {
  font-size: 13px;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.messages-list {
  margin-top: 16px;
  max-height: 600px;
  overflow-y: auto;
}

.message {
  padding: 12px 16px;
  margin-bottom: 8px;
  border-radius: 8px;
}

.message.user {
  background: var(--accent);
  margin-left: 20%;
}

.message.assistant {
  background: var(--bg-card);
  border: 1px solid var(--border);
  margin-right: 20%;
}

.message-role {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
  opacity: 0.7;
}

/* Usage */
.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 24px;
}

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

.pricing-table td {
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}

.pricing-table td:last-child {
  text-align: right;
  font-weight: 500;
  color: var(--accent);
}

.usage-chart {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin-top: 24px;
}

#userUsageChart {
  min-height: 200px;
}

.usage-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.usage-bar-label {
  width: 120px;
  font-size: 13px;
  color: var(--text-secondary);
}

.usage-bar-track {
  flex: 1;
  height: 24px;
  background: var(--bg-hover);
  border-radius: 4px;
  overflow: hidden;
}

.usage-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #a855f7);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 8px;
  font-size: 12px;
  font-weight: 500;
}

/* Settings */
.settings-form {
  max-width: 600px;
}

.form-group {
  margin-bottom: 24px;
}

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

.form-group textarea,
.form-group input,
.form-group select {
  width: 100%;
  padding: 12px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 14px;
  margin-bottom: 12px;
}

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

.form-group select {
  cursor: pointer;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}

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

/* Login Screen */
.login-screen {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.login-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px;
  width: 100%;
  max-width: 400px;
  text-align: center;
}

.login-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 24px;
}

.login-card h2 {
  margin-bottom: 32px;
  color: var(--text-secondary);
  font-weight: 400;
}

.login-card input {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 16px;
  margin-bottom: 16px;
}

.login-card input:focus {
  outline: none;
  border-color: var(--accent);
}

.login-card .btn {
  width: 100%;
  padding: 14px;
  font-size: 16px;
}

.login-error {
  color: var(--danger);
  margin-top: 16px;
  font-size: 14px;
}

/* Responsive */
@media (max-width: 768px) {
  .sidebar {
    width: 60px;
  }

  .logo-text,
  .nav-item span:not(.nav-icon) {
    display: none;
  }

  .main {
    margin-left: 60px;
  }
}