src/styles/App.css

.app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  background: var(--bg-primary, #ffffff);
  color: var(--text-primary, #213547);
}

.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1.5rem;
  border-bottom: 1px solid var(--border-color, #e5e5e5);
  background: var(--bg-secondary, #fafafa);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.header-left h1 {
  font-size: 1.25rem;
  font-weight: 600;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.status-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  transition: background-color 0.3s;
}

.status-indicator.running {
  background-color: #22c55e;
  box-shadow: 0 0 8px #22c55e;
}

.status-indicator.stopped {
  background-color: #ef4444;
}

.status-indicator.checking {
  background-color: #f59e0b;
  animation: pulse 1.5s infinite;
}

.status-indicator.error {
  background-color: #ef4444;
  animation: pulse 1s infinite;
}

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

.version {
  font-size: 0.75rem;
  color: var(--text-muted, #888);
  font-family: monospace;
}

.app-main {
  flex: 1;
  overflow: auto;
  padding: 1.5rem;
}

.page {
  max-width: 1200px;
  margin: 0 auto;
}

.page h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--bg-secondary, #fafafa);
  border: 1px solid var(--border-color, #e5e5e5);
  border-radius: 12px;
  padding: 1.5rem;
}

.card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary, #213547);
}

.action-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  padding: 0.625rem 1.25rem;
  border-radius: 8px;
  font-weight: 500;
  font-size: 0.875rem;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn.primary {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}

.btn.primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.btn.secondary {
  background: var(--bg-tertiary, #f0f0f0);
  color: var(--text-primary, #213547);
  border: 1px solid var(--border-color, #e5e5e5);
}

.btn.secondary:hover {
  background: var(--bg-hover, #e5e5e5);
}

.placeholder {
  color: var(--text-muted, #888);
  font-style: italic;
}

.chat-container {
  display: flex;
  height: calc(100vh - 200px);
  gap: 1.5rem;
}

.chat-sidebar {
  width: 300px;
  flex-shrink: 0;
  background: var(--bg-secondary, #fafafa);
  border: 1px solid var(--border-color, #e5e5e5);
  border-radius: 12px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
}

.chat-sidebar h3 {
  margin-bottom: 1rem;
}

.conversation-list {
  flex: 1;
  overflow-y: auto;
  list-style: none;
}

.conversation-list .placeholder {
  padding: 2rem;
  text-align: center;
}

.chat-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: var(--bg-secondary, #fafafa);
  border: 1px solid var(--border-color, #e5e5e5);
  border-radius: 12px;
  overflow: hidden;
}

.messages {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem;
}

.message-form {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border-color, #e5e5e5);
  display: flex;
  gap: 0.75rem;
}

.message-form textarea {
  flex: 1;
  padding: 0.75rem;
  border: 1px solid var(--border-color, #e5e5e5);
  border-radius: 8px;
  background: var(--bg-primary, #fff);
  color: var(--text-primary, #213547);
  font-family: inherit;
  resize: none;
  min-height: 60px;
}

.files-container {
  display: flex;
  height: calc(100vh - 200px);
  gap: 1.5rem;
}

.files-sidebar {
  width: 280px;
  flex-shrink: 0;
  background: var(--bg-secondary, #fafafa);
  border: 1px solid var(--border-color, #e5e5e5);
  border-radius: 12px;
  padding: 1.5rem;
}

.files-sidebar h3 {
  margin-bottom: 1rem;
}

.files-main {
  flex: 1;
  background: var(--bg-secondary, #fafafa);
  border: 1px solid var(--border-color, #e5e5e5);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.settings-sections {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  max-width: 800px;
}

.settings-section {
  background: var(--bg-secondary, #fafafa);
  border: 1px solid var(--border-color, #e5e5e5);
  border-radius: 12px;
  padding: 1.5rem;
}

.settings-section h3 {
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color, #e5e5e5);
}

.setting-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border-color, #e5e5e5);
}

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

.setting-item label {
  font-weight: 500;
  color: var(--text-primary, #213547);
}

.setting-item select,
.setting-item input[type="text"] {
  padding: 0.5rem 1rem;
  border: 1px solid var(--border-color, #e5e5e5);
  border-radius: 8px;
  background: var(--bg-primary, #fff);
  color: var(--text-primary, #213547);
  font-family: inherit;
  min-width: 250px;
}

.setting-item input[type="checkbox"] {
  width: 1.25rem;
  height: 1.25rem;
  accent-color: #667eea;
}

.status-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 0;
}

.status-item .status {
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
}

.status-item .status.running {
  background: #dcfce7;
  color: #166534;
}

.status-item .status.stopped {
  background: #fee2e2;
  color: #991b1b;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-tertiary: #0f3460;
    --bg-hover: #1f4068;
    --text-primary: #eaeaea;
    --text-muted: #888;
    --border-color: #2a2a4a;
  }
  
  .btn.secondary {
    background: var(--bg-tertiary);
    border-color: var(--border-color);
  }
  
  .btn.secondary:hover {
    background: var(--bg-hover);
  }
  
  .setting-item select,
  .setting-item input[type="text"],
  .message-form textarea {
    background: var(--bg-tertiary);
    border-color: var(--border-color);
    color: var(--text-primary);
  }
  
  .status-item .status.running {
    background: #064e3b;
    color: #6ee7b7;
  }
  
  .status-item .status.stopped {
    background: #7f1d1d;
    color: #fca5a5;
  }
}