/* Chat interface styles */

.chat-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  max-width: var(--max-width-chat);
  width: 100%;
  margin: 0 auto;
  min-height: 0; /* Allow flex shrinking */
  box-sizing: border-box;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-4);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
}

/* Message bubbles */
.message {
  display: flex;
  gap: var(--spacing-3);
  max-width: 85%;
  animation: fadeIn var(--transition-normal);
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

.message-assistant {
  align-self: flex-start;
}

.message-avatar {
  width: 2rem;
  height: 2rem;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  flex-shrink: 0;
}

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

.message-assistant .message-avatar {
  background-color: var(--color-bg-secondary);
  color: var(--color-text-secondary);
}

.message-content {
  padding: var(--spacing-3) var(--spacing-4);
  border-radius: var(--radius-xl);
  line-height: var(--line-height-relaxed);
}

.message-user .message-content {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  border-bottom-right-radius: var(--radius-sm);
}

.message-assistant .message-content {
  background-color: var(--color-bg-white);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-bottom-left-radius: var(--radius-sm);
}

.message-content p {
  margin: 0;
}
.message-content p + p,
.message-content p + ul,
.message-content p + ol,
.message-content p + .md-table-wrap,
.message-content ul + p,
.message-content ol + p,
.message-content .md-table-wrap + p {
  margin-top: var(--spacing-2);
}
.message-content ul,
.message-content ol {
  margin: 0;
  padding-left: 1.25em;
}
.message-content li + li {
  margin-top: 2px;
}
.message-content a {
  color: inherit;
  text-decoration: underline;
}

.md-table-wrap {
  overflow-x: auto;
  margin: var(--spacing-2) 0 0 0;
}
.md-table-wrap:first-child {
  margin-top: 0;
}
.md-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9em;
}
.md-table th,
.md-table td {
  text-align: left;
  padding: var(--spacing-1) var(--spacing-2);
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}
.md-table th {
  font-weight: 600;
}
.md-table tr:last-child td {
  border-bottom: 0;
}
.message-user .md-table th,
.message-user .md-table td {
  border-bottom-color: rgba(255, 255, 255, 0.3);
}

/* Typing dots animation */
.typing-dots {
  display: inline-flex;
  gap: 3px;
  align-items: center;
  padding: 4px 0;
}

.typing-dots span {
  display: inline-block;
  width: 8px;
  height: 8px;
  background-color: var(--color-text-muted);
  border-radius: 50%;
  animation: dotBounce 1.4s ease-in-out infinite;
}

.typing-dots span:nth-child(1) { animation-delay: 0s; }
.typing-dots span:nth-child(2) { animation-delay: 0.16s; }
.typing-dots span:nth-child(3) { animation-delay: 0.32s; }

@keyframes dotBounce {
  0%, 60%, 100% {
    transform: translateY(0);
    opacity: 0.4;
  }
  30% {
    transform: translateY(-6px);
    opacity: 1;
  }
}

/* Typing indicator */
.typing-indicator {
  display: flex;
  gap: var(--spacing-1);
  padding: var(--spacing-4);
}

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

.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);
  }
  40% {
    transform: scale(1);
  }
}

/* Input area - full width background, centered content */
.chat-input-container {
  /* Break out of parent to span full viewport width */
  width: 100vw;
  margin-left: calc(-50vw + 50%);
  padding: var(--spacing-4);
  padding-bottom: calc(var(--spacing-4) + env(safe-area-inset-bottom, 0px));
  background-color: var(--color-bg-white);
  border-top: 1px solid var(--color-border);
  flex-shrink: 0; /* Never shrink the input area */
}

.chat-input-wrapper {
  display: flex;
  gap: var(--spacing-3);
  align-items: flex-end;
  max-width: var(--max-width-chat);
  margin: 0 auto;
  padding: 0 var(--spacing-4);
  box-sizing: border-box;
}

.chat-input {
  flex: 1;
  min-width: 0; /* Allow flex shrinking */
  min-height: var(--input-height);
  max-height: 150px;
  resize: none;
  padding: var(--spacing-3) var(--spacing-4);
  font-family: inherit;
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.chat-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.chat-input::placeholder {
  color: var(--color-text-muted);
}

.chat-input:disabled {
  background-color: var(--color-bg-secondary);
  cursor: not-allowed;
}

.send-btn {
  width: var(--input-height);
  height: var(--input-height);
  padding: 0;
  border-radius: var(--radius-full);
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-fast);
  flex-shrink: 0;
}

.send-btn:hover:not(:disabled) {
  background-color: var(--color-primary-hover);
}

.send-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.send-btn svg {
  width: 1.25rem;
  height: 1.25rem;
}

/* Upload button (paperclip) — ghost-style to avoid competing with Send. */
.upload-btn {
  width: var(--input-height);
  height: var(--input-height);
  padding: 0;
  border-radius: var(--radius-full);
  background-color: transparent;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-fast), color var(--transition-fast);
  flex-shrink: 0;
}

.upload-btn:hover:not(:disabled) {
  background-color: var(--color-bg-secondary);
  color: var(--color-text);
}

.upload-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.upload-btn svg {
  width: 1.1rem;
  height: 1.1rem;
}

.upload-input {
  display: none;
}

.message-attachment {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-2) var(--spacing-3);
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
}

.message-attachment-icon {
  font-size: 1.1em;
}

.message-attachment-name {
  font-family: var(--font-mono, monospace);
}

.message-attachment--error {
  color: var(--color-error, #b91c1c);
  background-color: var(--color-error-bg, #fef2f2);
}

/* Staged-attachment chip row above the text input. Each chip shows a
 * spinner while uploading, then swaps to a filetype glyph plus a × button
 * to unstage the file before sending. The row hides itself when empty via
 * the [hidden] attribute. */
.pending-attachments {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-2);
  max-width: var(--max-width-chat);
  margin: 0 auto var(--spacing-2);
  padding: 0 var(--spacing-4);
  box-sizing: border-box;
}

.pending-attachment-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-1) var(--spacing-2);
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  max-width: 100%;
}

.pending-attachment-name {
  font-family: var(--font-mono, monospace);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 18rem;
}

.pending-attachment-icon {
  font-size: 1em;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1em;
  height: 1em;
  flex-shrink: 0;
}

.pending-attachment-spinner {
  width: 0.9em;
  height: 0.9em;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: pending-attachment-spin 0.8s linear infinite;
}

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

.pending-attachment-chip--uploading {
  color: var(--color-text-muted);
}

.pending-attachment-remove {
  appearance: none;
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 0;
  width: 1.25em;
  height: 1.25em;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1em;
  line-height: 1;
  flex-shrink: 0;
}

.pending-attachment-remove:hover {
  color: var(--color-text);
  background-color: var(--color-border);
}

/* Welcome message */
.welcome-message {
  text-align: center;
  padding: var(--spacing-8) var(--spacing-4);
  color: var(--color-text-secondary);
}

.welcome-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin-bottom: var(--spacing-2);
}

.welcome-subtitle {
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  max-width: 24rem;
  margin: 0 auto;
}

.welcome-small {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-normal);
  color: var(--color-text-muted);
  max-width: 28rem;
  margin: var(--spacing-4) auto 0;
}

.welcome-begin-btn {
  margin-top: var(--spacing-6);
  padding: var(--spacing-3) var(--spacing-6);
}

/* Small consent line under the Begin button on the welcome screen. */
.welcome-consent {
  margin-top: var(--spacing-4);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  line-height: var(--line-height-normal);
}

.welcome-consent a {
  color: var(--color-text-secondary);
  text-decoration: underline;
  text-decoration-color: var(--color-border);
  text-underline-offset: 2px;
}

.welcome-consent a:hover {
  color: var(--color-primary);
  text-decoration-color: currentColor;
}

/* Chat ended link */
.chat-ended-link {
  text-align: center;
  padding: var(--spacing-6) var(--spacing-4);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

.start-over-link {
  color: var(--color-primary);
  text-decoration: underline;
  cursor: pointer;
}

.start-over-link:hover {
  color: var(--color-primary-hover);
}

/* Error state */
.chat-error {
  background-color: var(--color-error-bg);
  color: var(--color-error);
  padding: var(--spacing-3) var(--spacing-4);
  border-radius: var(--radius-md);
  margin: var(--spacing-2) 0;
  font-size: var(--font-size-sm);
}

/* Mobile responsive */
@media (max-width: 640px) {
  .chat-messages {
    padding: var(--spacing-3);
  }

  .message {
    max-width: 90%;
  }

  .chat-input-container {
    padding: var(--spacing-3);
    padding-bottom: calc(var(--spacing-3) + env(safe-area-inset-bottom, 0px));
  }

  .chat-input-wrapper {
    padding: 0 var(--spacing-3);
  }

  .chat-input {
    padding: var(--spacing-2) var(--spacing-3);
  }
}