:root {
  font-family: system-ui, Avenir, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  font-weight: 400;

  color-scheme: light dark;
  color: rgba(255, 255, 255, 0.87);
  background-color: #242424;

  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  font-weight: 500;
  color: #646cff;
  text-decoration: inherit;
}
a:hover {
  color: #535bf2;
}

body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  width: 100%;
}

#root {
  width: 100%;
  min-height: 100vh;
}

h1 {
  font-size: 3.2em;
  line-height: 1.1;
}

button {
  border-radius: 8px;
  border: 1px solid transparent;
  padding: 0.6em 1.2em;
  font-size: 1em;
  font-weight: 500;
  font-family: inherit;
  background-color: #1a1a1a;
  cursor: pointer;
  transition: border-color 0.25s;
}
button:hover {
  border-color: #646cff;
}
button:focus,
button:focus-visible {
  outline: 4px auto -webkit-focus-ring-color;
}

@media (prefers-color-scheme: light) {
  :root {
    color: #213547;
    background-color: #ffffff;
  }
  a:hover {
    color: #747bff;
  }
  button {
    background-color: #f9f9f9;
  }
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #0176d3;
  --primary-dark: #014486;
  --bg-primary: #f4f6f9;
  --bg-secondary: #ffffff;
  --text-primary: #181818;
  --text-secondary: #5c5c5c;
  --border-color: #e5e5e5;
  --accent: #7c3aed;
  --success: #2e844a;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 4px 20px rgba(0, 0, 0, 0.12);
}

.canvas-app {
  min-height: 100vh;
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.canvas-container {
  width: 100%;
  max-width: 100%;
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg-secondary);
}

/* Header */
.canvas-header {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-secondary);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--primary);
  font-weight: 600;
  font-size: 18px;
}

.logo svg {
  color: var(--primary);
}

/* Main Content */
.canvas-main {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
}

/* Welcome Section */
.welcome-section {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
}

.welcome-content {
  text-align: center;
  max-width: 600px;
}

.welcome-content h1 {
  font-size: 32px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.welcome-content p {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.suggestion-chip {
  padding: 12px 20px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  font-size: 14px;
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.2s ease;
}

.suggestion-chip:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
  box-shadow: var(--shadow);
}

/* Conversation Area */
.conversation-area {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.message {
  display: flex;
  gap: 16px;
  max-width: 85%;
}

.message.user {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.message-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.message.user .message-avatar {
  background: var(--primary);
}

.message-content {
  background: var(--bg-primary);
  padding: 16px 20px;
  border-radius: 20px;
  border-top-left-radius: 4px;
}

.message.user .message-content {
  background: var(--primary);
  color: white;
  border-radius: 20px;
  border-top-right-radius: 4px;
}

.message-content p {
  font-size: 15px;
  line-height: 1.5;
}

/* Typing Indicator */
.typing-indicator {
  display: flex;
  gap: 4px;
  padding: 8px 0;
}

.typing-indicator span {
  width: 8px;
  height: 8px;
  background: var(--text-secondary);
  border-radius: 50%;
  animation: bounce 1.4s infinite ease-in-out both;
}

.typing-indicator span:nth-child(1) { animation-delay: -0.32s; }
.typing-indicator span:nth-child(2) { animation-delay: -0.16s; }

@keyframes bounce {
  0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
  40% { transform: scale(1); opacity: 1; }
}

/* Canvas Result */
.canvas-result {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 24px;
  box-shadow: var(--shadow);
}

/* Error Message */
.error-message {
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: 12px;
  padding: 16px;
  color: #dc2626;
}

/* Footer / Input Area */
.canvas-footer {
  padding: 20px 24px;
  border-top: 1px solid var(--border-color);
  background: var(--bg-secondary);
}

.input-form {
  max-width: 800px;
  margin: 0 auto;
}

.input-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-primary);
  border: 2px solid var(--border-color);
  border-radius: 28px;
  padding: 8px 8px 8px 20px;
  transition: all 0.2s ease;
}

.input-wrapper:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(1, 118, 211, 0.1);
}

.prompt-input {
  flex: 1;
  border: none;
  background: transparent;
  font-size: 16px;
  color: var(--text-primary);
  outline: none;
}

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

.send-button {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary);
  border: none;
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.send-button:hover:not(:disabled) {
  background: var(--primary-dark);
  transform: scale(1.05);
}

.send-button:disabled {
  background: var(--border-color);
  cursor: not-allowed;
}

.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* Responsive */
@media (max-width: 768px) {
  .canvas-container {
    max-width: 100%;
  }
  
  .welcome-content h1 {
    font-size: 24px;
  }
  
  .suggestions {
    flex-direction: column;
  }
  
  .message {
    max-width: 95%;
  }
}