/* Chat List */
.chat-list {
  display: flex;
  flex-direction: column;
  gap: var(--block-space-half);
}

.chat-item {
  display: flex;
  align-items: center;
  background: var(--color-canvas);
  border: 1px solid var(--color-border);
  border-radius: 0.5rem;
  padding: var(--block-space) var(--inline-space-double);
  transition: border-color 0.15s ease;
}

.chat-item:hover {
  border-color: var(--color-primary);
}

.chat-item__link {
  flex: 1;
  text-decoration: none;
  color: inherit;
}

.chat-item__content {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.chat-item__title {
  font-weight: 500;
  color: var(--color-ink);
}

.chat-item__meta {
  font-size: var(--text-small);
  color: var(--color-ink-muted);
}

.chat-item__delete {
  background: none;
  border: none;
  color: var(--color-ink-muted);
  cursor: pointer;
  padding: 0.5rem;
  opacity: 0;
  transition: opacity 0.15s ease, color 0.15s ease;
}

.chat-item:hover .chat-item__delete {
  opacity: 1;
}

.chat-item__delete:hover {
  color: var(--color-negative);
}

.chat-item__delete svg {
  width: 1.25rem;
  height: 1.25rem;
}

/* Quick Start */
.chat-quick-start {
  margin-bottom: var(--block-space-double);
}

.chat-quick-start__form {
  display: flex;
  flex-direction: column;
}

.chat-quick-start .chat-input-wrapper {
  background: var(--color-canvas);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-subtle);
}

.chat-quick-start .chat-input-wrapper:focus-within {
  border-color: var(--color-primary);
}

/* Section Title */
.section-title {
  font-size: var(--text-small);
  font-weight: 500;
  color: var(--color-ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 0 0 var(--block-space-half);
}

/* Chat Container */
.chat-container {
  display: flex;
  flex-direction: column;
  height: calc(100vh - 8rem);
  max-height: calc(100vh - 8rem);
  background: var(--color-canvas);
  border-radius: 0.5rem;
  overflow: hidden;
}

.chat-header {
  display: flex;
  align-items: center;
  gap: var(--inline-space);
  padding: var(--block-space) var(--inline-space-double);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-canvas);
}

.chat-header__back {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  color: var(--color-ink-muted);
  text-decoration: none;
  border-radius: 0.25rem;
  transition: background-color 0.15s ease;
}

.chat-header__back:hover {
  background-color: var(--color-border-light);
}

.chat-header__back svg {
  width: 1.25rem;
  height: 1.25rem;
}

.chat-header__title {
  flex: 1;
  font-size: var(--text-medium);
  font-weight: 500;
  margin: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Chat Messages */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--block-space-double) var(--inline-space-double);
  display: flex;
  flex-direction: column;
  gap: var(--block-space);
}

.chat-message {
  display: flex;
  gap: var(--inline-space);
  max-width: 85%;
}

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

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

.chat-message__avatar {
  flex-shrink: 0;
}

.chat-avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  font-size: var(--text-x-small);
  font-weight: 600;
}

.chat-avatar--user {
  background: var(--color-primary);
  color: white;
}

.chat-avatar--assistant {
  background: var(--color-border);
  color: var(--color-ink);
}

.chat-avatar--assistant svg {
  width: 1.25rem;
  height: 1.25rem;
}

.chat-message__content {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.chat-message__text {
  padding: var(--block-space) var(--inline-space-double);
  border-radius: 1rem;
  line-height: 1.5;
}

.chat-message--user .chat-message__text {
  background: var(--color-primary);
  color: white;
  border-bottom-right-radius: 0.25rem;
}

.chat-message--assistant .chat-message__text {
  background: var(--color-border-light);
  color: var(--color-ink);
  border-bottom-left-radius: 0.25rem;
}

.chat-message__text p {
  margin: 0;
}

.chat-message__text p + p {
  margin-top: 0.5rem;
}

.chat-message__meta {
  font-size: var(--text-x-small);
  color: var(--color-ink-muted);
  padding: 0 var(--inline-space);
}

/* Welcome Screen */
.chat-welcome {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--block-space-double);
  flex: 1;
}

.chat-welcome h2 {
  font-size: var(--text-large);
  margin: 0 0 var(--block-space-half);
  color: var(--color-ink);
}

.chat-welcome p {
  color: var(--color-ink-muted);
  margin: 0 0 var(--block-space-double);
  max-width: 30rem;
}

.chat-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--block-space-half);
  justify-content: center;
}

.chat-suggestion {
  background: var(--color-canvas);
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  padding: 0.5rem 1rem;
  font-size: var(--text-small);
  color: var(--color-ink);
  cursor: pointer;
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.chat-suggestion:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
}

/* Typing Indicator */
.typing-indicator {
  display: flex;
  align-items: center;
  gap: var(--inline-space);
  padding: var(--block-space-half) 0;
}

.typing-dots {
  display: flex;
  gap: 0.25rem;
  padding: var(--block-space) var(--inline-space-double);
  background: var(--color-border-light);
  border-radius: 1rem;
}

.typing-dot {
  width: 0.5rem;
  height: 0.5rem;
  background: var(--color-ink-muted);
  border-radius: 50%;
  animation: typingBounce 1.4s infinite ease-in-out;
}

.typing-dot:nth-child(1) {
  animation-delay: 0s;
}

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

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

@keyframes typingBounce {
  0%, 60%, 100% {
    transform: translateY(0);
  }
  30% {
    transform: translateY(-0.25rem);
  }
}

/* Chat Input */
.chat-input-container {
  padding: var(--block-space) var(--inline-space-double);
  border-top: 1px solid var(--color-border);
  background: var(--color-canvas);
}

.chat-input-form {
  display: flex;
  flex-direction: column;
}

.chat-input-wrapper {
  display: flex;
  gap: var(--inline-space);
  align-items: flex-end;
  background: var(--color-border-light);
  border-radius: 1.5rem;
  padding: 0.5rem 0.5rem 0.5rem 1rem;
}

.chat-input {
  flex: 1;
  border: none;
  background: transparent;
  resize: none;
  font-family: inherit;
  font-size: var(--text-normal);
  line-height: 1.5;
  padding: 0.5rem 0;
  max-height: 10rem;
  overflow-y: auto;
}

.chat-input:focus {
  outline: none;
}

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

.chat-submit {
  background: var(--color-primary);
  color: white;
  border: none;
  border-radius: 1rem;
  padding: 0.5rem 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.15s ease, opacity 0.15s ease;
}

.chat-submit:hover {
  background: color-mix(in oklch, var(--color-primary) 90%, black);
}

.chat-submit:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Streaming Message */
.chat-message--streaming .chat-message__text {
  position: relative;
}

.chat-message--streaming .chat-message__text::after {
  content: '';
  display: inline-block;
  width: 0.5rem;
  height: 1rem;
  background: var(--color-ink);
  margin-left: 0.25rem;
  animation: cursorBlink 1s infinite;
}

@keyframes cursorBlink {
  0%, 50% {
    opacity: 1;
  }
  51%, 100% {
    opacity: 0;
  }
}