:root {
  --primary-color: #6c2bd9;
  --secondary-color: #6c757d;
  --light-color: #f8f9fa;
  --dark-color: #343a40;
  --message-user-bg: #007bff;
  --message-user-text: #ffffff;
  --message-assistant-bg: #e9ecef;
  --message-assistant-text: #212529;
  --border-color: #ced4da;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --border-radius: 0.375rem;
  --spacing-unit: 8px;
}

body {
  font-family: var(--font-family);
  margin: 0;
  background-color: #fff;
  display: flex;
  justify-content: center;
  min-height: 100vh;
  padding: calc(var(--spacing-unit) * 2);
  box-sizing: border-box;
}

.app-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: 600px;
  margin-top: auto;
  margin-bottom: auto;
}

.logo {
  width: 160px;
  height: 160px;
  object-fit: contain;
  margin-bottom: calc(var(--spacing-unit) * 2);
}

.chat-container {
  width: 100%;
  background-color: #fff;
  border-radius: var(--border-radius);
  box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  height: 65vh;
  max-height: 700px;
}

.chat-header {
  background-color: var(--primary-color);
  color: white;
  padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 2);
  text-align: center;
  font-size: 1.2rem;
}

.chat-header h1 {
  margin: 0;
  font-size: 1.25rem;
}

.chat-window {
  flex-grow: 1;
  padding: calc(var(--spacing-unit) * 2);
  overflow-y: auto;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-unit);
}

.chat-window::-webkit-scrollbar {
  width: 8px;
}

.chat-window::-webkit-scrollbar-track {
  background: var(--light-color);
}

.chat-window::-webkit-scrollbar-thumb {
  background-color: var(--secondary-color);
  border-radius: 10px;
  border: 2px solid var(--light-color);
}

.message {
  padding: var(--spacing-unit) calc(var(--spacing-unit) * 1.5);
  border-radius: var(--border-radius);
  max-width: 80%;
  line-height: 1.4;
  word-wrap: break-word;
  white-space: normal;
}

.message.user {
  background-color: var(--message-user-bg);
  color: var(--message-user-text);
  align-self: flex-end;
  border-bottom-right-radius: 0;
}

.message.assistant {
  background-color: var(--message-assistant-bg);
  color: var(--message-assistant-text);
  align-self: flex-start;
  border-bottom-left-radius: 0;
}

.message.error {
  background-color: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
  align-self: stretch;
  text-align: center;
}

.typing-indicator {
  padding: calc(var(--spacing-unit) * 0.5) calc(var(--spacing-unit) * 2);
  font-style: italic;
  color: var(--secondary-color);
  font-size: 0.9rem;
}

.chat-input-area {
  display: flex;
  padding: var(--spacing-unit);
  border-top: 1px solid var(--border-color);
  background-color: #fff;
}

#userInput {
  flex-grow: 1;
  padding: calc(var(--spacing-unit) * 1.25);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 1rem;
  margin-right: var(--spacing-unit);
}

#userInput:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 0.2rem rgba(186, 58, 55, 0.25);
}

#sendButton {
  padding: calc(var(--spacing-unit) * 1.25);
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s ease;
}

#sendButton:hover {
  background-color: color-mix(in srgb, var(--primary-color) 70%, black);
}

#sendButton:disabled {
  background-color: var(--secondary-color);
  cursor: not-allowed;
}

#sendButton svg {
  fill: white;
}

.chat-image {
  display: block;
  max-width: 80%;
  max-height: 300px;
  border-radius: var(--border-radius);
  margin-top: calc(var(--spacing-unit) * 1);
  margin-bottom: calc(var(--spacing-unit) * 0.5);
  border: 1px solid var(--border-color);
}

.message.assistant .chat-image {
  margin-left: 0;
  margin-right: auto;
}

.message.user .chat-image {
  margin-left: auto;
  margin-right: 0;
}

.chat-pdf-link {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  background-color: var(--message-assistant-bg);
  color: var(--message-assistant-text);
  padding: calc(var(--spacing-unit) * 1) calc(var(--spacing-unit) * 1.5);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  margin-top: calc(var(--spacing-unit) * 1);
  transition: background-color 0.2s ease, border-color 0.2s ease;
  font-size: 0.9rem;
  max-width: 100%;
}

.chat-pdf-link:hover {
  background-color: color-mix(in srgb, var(--message-assistant-bg) 90%, black);
  border-color: color-mix(in srgb, var(--border-color) 70%, black);
  color: var(--primary-color);
}

.chat-pdf-link svg {
  margin-right: calc(var(--spacing-unit) * 0.75);
}

.chat-pdf-link span {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: calc(100% - 24px - var(--spacing-unit));
}

.message.user .chat-pdf-link {
  background-color: var(--message-user-bg);
  color: var(--message-user-text);
  border: 1px solid color-mix(in srgb, var(--message-user-bg) 80%, black);
}
.message.user .chat-pdf-link:hover {
  background-color: color-mix(in srgb, var(--message-user-bg) 80%, black);
  border-color: color-mix(in srgb, var(--message-user-bg) 60%, black);
}
.message.user .chat-pdf-link svg {
  fill: var(--message-user-text);
}

.chat-product-link {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  background-color: var(--primary-color);
  color: white;
  padding: calc(var(--spacing-unit) * 1) calc(var(--spacing-unit) * 1.5);
  border-radius: var(--border-radius);
  margin-top: calc(var(--spacing-unit) * 1);
  transition: background-color 0.2s ease;
  font-size: 0.9rem;
  font-weight: bold;
  border: 1px solid var(--primary-color);
}

.chat-product-link:hover {
  background-color: color-mix(in srgb, var(--primary-color) 80%, black);
  border-color: color-mix(in srgb, var(--primary-color) 70%, black);
}

.chat-product-link svg {
  margin-right: calc(var(--spacing-unit) * 0.75);
  fill: white;
}

.chat-product-link span {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

@media (max-width: 640px) {
  body {
    padding: var(--spacing-unit);
    align-items: flex-start;
  }

  .app-wrapper {
    padding-top: var(--spacing-unit);
  }

  .logo {
    margin-bottom: var(--spacing-unit);
  }

  .chat-container {
    height: 75vh;
    max-height: none;
  }

  .chat-header h1 {
    font-size: 1.1rem;
  }

  .message {
    max-width: 90%;
  }

  .chat-image {
    max-width: 100%;
  }
}