/* Chat Widget */
.chat-toggle {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  background: var(--accent-color);
  color: #fff;
  border: 2px solid var(--primary-color);
  cursor: pointer;
  font-family: var(--font-family);
  font-size: 1.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  transition: background 0.15s;
}

.chat-toggle:hover {
  background: var(--primary-color);
}

.chat-toggle[aria-expanded="true"] {
  display: none;
}

/* Chat Panel */
.chat-panel {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 500px;
  height: 600px;
  background: var(--background-color);
  border: 2px solid var(--primary-color);
  display: none;
  flex-direction: column;
  z-index: 1001;
  font-family: var(--font-family);
}

.chat-panel.open {
  display: flex;
}

/* Header */
.chat-header {
  background: var(--accent-color);
  color: #fff;
  padding: 10px 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-shrink: 0;
}

.chat-header-title {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}

.chat-header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.chat-clear {
  background: none;
  border: 1px solid rgba(255, 255, 255, 0.5);
  color: rgba(255, 255, 255, 0.7);
  font-family: var(--font-family);
  font-size: 0.7rem;
  cursor: pointer;
  padding: 2px 6px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.chat-clear:hover {
  color: #fff;
  border-color: #fff;
}

.chat-close {
  background: none;
  border: none;
  color: #fff;
  font-family: var(--font-family);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 0 4px;
  line-height: 1;
}

.chat-close:hover {
  opacity: 0.7;
}

/* Messages */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.chat-message {
  font-size: 0.82rem;
  line-height: 1.55;
  color: var(--text-color);
  padding: 8px 10px;
  border-left: 3px solid var(--border-color);
  max-width: 90%;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.chat-message.user {
  border-left-color: var(--accent-color);
  align-self: flex-end;
  text-align: right;
  border-left: none;
  border-right: 3px solid var(--accent-color);
  padding: 8px 10px;
}

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

.chat-message a {
  color: var(--link-color);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.chat-message a:hover {
  color: var(--link-hover);
}

/* Streaming cursor */
.chat-cursor {
  display: inline-block;
  width: 0.55em;
  height: 1.05em;
  background: var(--accent-color);
  vertical-align: text-bottom;
  animation: blink 0.7s step-end infinite;
}

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

/* Input */
.chat-input-area {
  display: flex;
  border-top: 2px solid var(--primary-color);
  flex-shrink: 0;
}

.chat-input {
  flex: 1;
  padding: 10px 12px;
  border: 2px solid var(--primary-color);
  border-right: none;
  background: #fff;
  font-family: var(--font-family);
  font-size: 0.82rem;
  color: var(--primary-color);
  outline: none;
}

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

.chat-send {
  background: var(--accent-color);
  color: #fff;
  border: 2px solid var(--primary-color);
  border-left: none;
  padding: 10px 14px;
  font-family: var(--font-family);
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  text-transform: uppercase;
}

.chat-send:hover {
  background: var(--primary-color);
}

.chat-send:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* Rate limit / error */
.chat-status {
  font-size: 0.75rem;
  color: var(--secondary-color);
  padding: 6px 14px;
  text-align: center;
  border-top: 1px solid var(--border-color);
  display: none;
}

.chat-status.visible {
  display: block;
}

/* Mobile */
@media (max-width: 600px) {
  .chat-toggle {
    bottom: 16px;
    right: 16px;
    width: 48px;
    height: 48px;
    font-size: 1.2rem;
    background: var(--primary-color);
    border-color: var(--background-color);
  }

  .chat-toggle:hover {
    background: var(--accent-color);
  }
}