style.css

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

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: #ffffff;
  color: #111827;
  min-height: 100vh;
  line-height: 1.6;
}

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

/* Chat Panel */
.chat-panel {
  flex: 0 0 30%;
  display: flex;
  flex-direction: column;
  border-right: 1px solid #e5e7eb;
  background: #fafafa;
  height: 100vh;
}

.chat-header {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid #e5e7eb;
  background: #ffffff;
}

.chat-header h1 {
  font-size: 1.25rem;
  font-weight: 600;
  color: #111827;
}

.chat-messages {
  flex: 1;
  padding: 1rem 1.5rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.message {
  display: flex;
}

.message.system {
  justify-content: flex-start;
}

.message.user {
  justify-content: flex-end;
}

.message-content {
  max-width: 80%;
  padding: 0.75rem 1rem;
  border-radius: 4px;
  background: #ffffff;
  border: 1px solid #e5e7eb;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.message.system .message-content {
  background: #ffffff;
}

.message.user .message-content {
  background: #111827;
  color: #ffffff;
}

.chat-input {
  padding: 1rem 1.5rem;
  border-top: 1px solid #e5e7eb;
  background: #ffffff;
  display: flex;
  gap: 0.5rem;
  align-items: flex-end;
}

.chat-input textarea {
  flex: 1;
  min-height: 2.5rem;
  max-height: 6rem;
  padding: 0.75rem;
  border: 1px solid #d1d5db;
  border-radius: 4px;
  resize: none;
  outline: none;
  font-family: inherit;
  font-size: 0.875rem;
  transition: border-color 0.2s;
}

.chat-input textarea:focus {
  border-color: #9ca3af;
}

.send-button {
  padding: 0.75rem 1rem;
  background: #111827;
  color: #ffffff;
  border: none;
  border-radius: 4px;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s;
}

.send-button:hover {
  background: #374151;
}

/* Workspace Panel */
.workspace-panel {
  flex: 0 0 70%;
  display: flex;
  flex-direction: column;
  background: #ffffff;
  height: 100vh;
}

.workspace-header {
  padding: 0.75rem 1.5rem;
  border-bottom: 1px solid #e5e7eb;
  background: #fafafa;
  display: flex;
  gap: 0.5rem;
}

.tab-button {
  padding: 0.5rem 1rem;
  background: #ffffff;
  color: #6b7280;
  border: 1px solid #e5e7eb;
  border-radius: 4px;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.tab-button.active {
  background: #111827;
  color: #ffffff;
  border-color: #111827;
}

.tab-button:hover:not(.active) {
  background: #f3f4f6;
}

.workspace-content {
  flex: 1;
  position: relative;
}

.view {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.view.active {
  opacity: 1;
  visibility: visible;
}

.preview-container {
  height: 100%;
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

#preview-iframe {
  width: 100%;
  height: 100%;
  border: 1px solid #e5e7eb;
  border-radius: 4px;
  background: #ffffff;
}

.spinner {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 24px;
  height: 24px;
  border: 2px solid #e5e7eb;
  border-top: 2px solid #6b7280;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.hidden {
  display: none;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.editors-container {
  height: 100%;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  overflow-y: auto;
}

.editor-group {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

.editor-group label {
  font-size: 0.875rem;
  font-weight: 500;
  color: #6b7280;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.code-editor {
  flex: 1;
  font-family: 'Fira Code', 'JetBrains Mono', 'Monaco', 'Cascadia Code', monospace;
  font-size: 13px;
  line-height: 1.5;
  padding: 1rem;
  border: 1px solid #d1d5db;
  border-radius: 4px;
  background: #ffffff;
  resize: none;
  outline: none;
  transition: border-color 0.2s;
  min-height: 150px;
}

.code-editor:focus {
  border-color: #9ca3af;
}

.image-upload {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  padding: 0.5rem 0;
}

.image-upload input {
  flex: 1;
  padding: 0.5rem 0.75rem;
  border: 1px solid #d1d5db;
  border-radius: 4px;
  font-size: 0.875rem;
  outline: none;
  transition: border-color 0.2s;
}

.image-upload input:focus {
  border-color: #9ca3af;
}

/* Responsive */
@media (max-width: 900px) {
  .app {
    flex-direction: column;
    height: auto;
  }

  .chat-panel {
    flex: none;
    height: 50vh;
    border-right: none;
    border-bottom: 1px solid #e5e7eb;
  }

  .workspace-panel {
    flex: none;
    height: 50vh;
  }

  .workspace-content {
    height: 100%;
  }

  .editors-container {
    height: 100%;
  }
}