/* Welcome screen */
.welcome {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  padding: 32px;
  text-align: center;
}

.welcome.hidden {
  display: none;
}

.welcome-icon {
  margin-bottom: 24px;
}

.welcome-logo-badge {
  width: 200px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
}

.welcome-logo {
  width: 100%;
  height: auto;
}

.welcome-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.welcome-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 400px;
}

.welcome-suggestions {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  max-width: 520px;
  width: 100%;
}

.suggestion-chip {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.8125rem;
  text-align: left;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.suggestion-chip:hover {
  background-color: var(--bg-hover);
  border-color: var(--accent);
}

.suggestion-chip svg {
  flex-shrink: 0;
  color: var(--accent);
}

/* Messages */
.messages {
  display: none;
  flex-direction: column;
  padding: 24px 16px;
  gap: 0;
  max-width: calc(var(--chat-max-width) + 32px);
  width: 100%;
  margin: 0 auto;
}

.messages.visible {
  display: flex;
  flex: 1;
}

.message {
  display: flex;
  gap: 16px;
  padding: 20px 0;
}

.message + .message {
  border-top: 1px solid var(--border-light);
}

.message-avatar {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  font-weight: 600;
}

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

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

.message-content {
  flex: 1;
  min-width: 0;
  overflow-wrap: break-word;
}

.message-role {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.message-body {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--text-primary);
}

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

.typing-indicator span {
  width: 6px;
  height: 6px;
  background-color: var(--text-tertiary);
  border-radius: 50%;
  animation: typing-bounce 1.4s ease-in-out infinite;
}

.typing-indicator span:nth-child(2) {
  animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes typing-bounce {
  0%, 60%, 100% { transform: translateY(0); }
  30% { transform: translateY(-6px); }
}

/* Input area */
.input-container {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  max-width: var(--chat-max-width);
  margin: 0 auto;
  width: 100%;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 8px 8px 8px 16px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.input-container:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.chat-input {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.9375rem;
  line-height: 1.5;
  resize: none;
  max-height: var(--input-max-height);
  padding: 4px 0;
  outline: none;
}

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

.btn-send,
.btn-stop {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: var(--radius-md);
}

.input-hint {
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-tertiary);
  margin-top: 8px;
  max-width: var(--chat-max-width);
  margin-left: auto;
  margin-right: auto;
}

/* Attachment button */
.btn-attach {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: var(--radius-md);
  color: var(--text-tertiary);
}

.btn-attach:hover {
  color: var(--accent);
}

/* Attachment preview */
.attachment-preview {
  display: none;
  flex-wrap: wrap;
  gap: 6px;
  max-width: var(--chat-max-width);
  margin: 0 auto 8px auto;
  width: 100%;
  padding: 0 4px;
}

.attachment-preview.visible {
  display: flex;
}

.attachment-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  color: var(--text-primary);
  max-width: 200px;
}

.attachment-chip-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.attachment-chip .remove-attachment {
  cursor: pointer;
  color: var(--text-tertiary);
  font-size: 1rem;
  line-height: 1;
  flex-shrink: 0;
}

.attachment-chip .remove-attachment:hover {
  color: var(--danger);
}

/* Drag-and-drop overlay */
.chat-area.drag-over {
  position: relative;
}

.chat-area.drag-over::after {
  content: 'Datei hier ablegen';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: color-mix(in srgb, var(--accent) 10%, var(--bg-primary) 90%);
  border: 2px dashed var(--accent);
  border-radius: var(--radius-md);
  font-size: 1.125rem;
  color: var(--accent);
  z-index: 10;
  pointer-events: none;
}

/* Attachment tags in messages */
.message-attachments {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 6px;
}

.message-attachment-tag {
  font-size: 0.6875rem;
  padding: 2px 8px;
  background: var(--bg-active);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
}

/* Uploading state */
.attachment-chip.uploading {
  opacity: 0.6;
}

/* Error message */
.message-error {
  color: var(--danger);
  font-size: 0.875rem;
  padding: 8px 12px;
  background-color: color-mix(in srgb, var(--danger) 10%, transparent);
  border-radius: var(--radius-md);
  margin-top: 8px;
}

/* Input options bar */
.input-options {
  display: flex;
  align-items: center;
  gap: 16px;
  max-width: var(--chat-max-width);
  margin: 0 auto 6px auto;
  width: 100%;
  padding: 0 4px;
}

.input-option {
  display: flex;
  align-items: center;
  gap: 4px;
}

.option-label {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.75rem;
  color: var(--text-tertiary);
  white-space: nowrap;
}

.option-label svg {
  flex-shrink: 0;
}

.option-select {
  appearance: none;
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 2px 20px 2px 6px;
  font-family: inherit;
  font-size: 0.75rem;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 4px center;
  transition: border-color var(--transition-fast);
}

.option-select:hover {
  border-color: var(--accent);
}

.option-toggle {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.75rem;
  color: var(--text-tertiary);
  cursor: pointer;
  white-space: nowrap;
  transition: color var(--transition-fast);
}

.option-toggle:hover {
  color: var(--text-primary);
}

.option-toggle input[type="checkbox"] {
  width: 14px;
  height: 14px;
  margin: 0;
  accent-color: var(--accent);
  cursor: pointer;
}

.option-toggle svg {
  flex-shrink: 0;
}

/* Thinking block */
.thinking-block {
  margin-bottom: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background-color: var(--bg-secondary);
  overflow: hidden;
}

.thinking-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-tertiary);
  cursor: pointer;
  user-select: none;
  transition: color var(--transition-fast);
}

.thinking-header:hover {
  color: var(--text-primary);
}

.thinking-header svg {
  flex-shrink: 0;
  color: var(--accent);
}

.thinking-block[open] .thinking-header {
  border-bottom: 1px solid var(--border);
}

.thinking-content {
  padding: 12px;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--text-secondary);
  max-height: 300px;
  overflow-y: auto;
}

/* Grounding sources */
.message-grounding {
  margin-top: 10px;
  padding: 8px 12px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.grounding-header {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-tertiary);
  margin-bottom: 6px;
}

.grounding-header svg {
  color: var(--accent);
}

.grounding-source {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--accent);
  text-decoration: none;
  padding: 2px 8px;
  margin: 2px 4px 2px 0;
  background: var(--accent-light);
  border-radius: var(--radius-sm);
  transition: opacity var(--transition-fast);
}

.grounding-source:hover {
  opacity: 0.8;
  text-decoration: underline;
}