/* Chat Widget — uses Material theme CSS variables for automatic dark/light support */

/* Toggle button */
.chat-toggle {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: none;
  background: var(--md-primary-fg-color);
  color: var(--md-primary-bg-color);
  cursor: pointer;
  z-index: 1000;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.chat-toggle:hover {
  transform: scale(1.08);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.3);
}

.chat-toggle svg {
  width: 26px;
  height: 26px;
  fill: currentColor;
  transition: opacity 0.15s ease;
}

/* Popup container */
.chat-popup {
  position: fixed;
  bottom: 92px;
  right: 24px;
  width: 380px;
  height: 500px;
  max-height: calc(100vh - 120px);
  background: var(--md-default-bg-color);
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 12px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  opacity: 0;
  transform: translateY(12px) scale(0.96);
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.chat-popup.open {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

/* Header */
.chat-header {
  padding: 14px 16px;
  background: var(--md-primary-fg-color);
  color: var(--md-primary-bg-color);
  border-radius: 12px 12px 0 0;
  font-weight: 600;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.chat-header-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #4caf50;
  flex-shrink: 0;
}

/* Messages area */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.chat-messages::-webkit-scrollbar {
  width: 4px;
}

.chat-messages::-webkit-scrollbar-thumb {
  background: var(--md-default-fg-color--lighter);
  border-radius: 2px;
}

/* Message bubbles */
.chat-msg {
  max-width: 85%;
  padding: 10px 14px;
  border-radius: 14px;
  font-size: 0.85rem;
  line-height: 1.5;
  word-wrap: break-word;
}

.chat-msg a {
  color: var(--md-accent-fg-color);
  text-decoration: underline;
}

.chat-msg-bot {
  align-self: flex-start;
  background: var(--md-code-bg-color);
  color: var(--md-default-fg-color);
  border-bottom-left-radius: 4px;
}

.chat-msg-user {
  align-self: flex-end;
  background: var(--md-primary-fg-color);
  color: var(--md-primary-bg-color);
  border-bottom-right-radius: 4px;
}

/* Suggested topics */
.chat-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 6px;
}

.chat-suggestion-btn {
  background: var(--md-default-bg-color);
  color: var(--md-primary-fg-color);
  border: 1px solid var(--md-primary-fg-color);
  border-radius: 16px;
  padding: 5px 12px;
  font-size: 0.78rem;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.chat-suggestion-btn:hover {
  background: var(--md-primary-fg-color);
  color: var(--md-primary-bg-color);
}

/* Input area */
.chat-input-area {
  display: flex;
  padding: 10px 12px;
  border-top: 1px solid var(--md-default-fg-color--lightest);
  gap: 8px;
  flex-shrink: 0;
}

.chat-input {
  flex: 1;
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 20px;
  padding: 8px 14px;
  font-size: 0.85rem;
  background: var(--md-default-bg-color);
  color: var(--md-default-fg-color);
  outline: none;
  font-family: inherit;
}

.chat-input::placeholder {
  color: var(--md-default-fg-color--light);
}

.chat-input:focus {
  border-color: var(--md-primary-fg-color);
}

.chat-send {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  background: var(--md-primary-fg-color);
  color: var(--md-primary-bg-color);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: opacity 0.15s ease;
}

.chat-send:hover {
  opacity: 0.85;
}

.chat-send svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

/* Mobile */
@media (max-width: 480px) {
  .chat-popup {
    width: calc(100vw - 24px);
    right: 12px;
    bottom: 88px;
    height: calc(100vh - 120px);
  }

  .chat-toggle {
    right: 16px;
    bottom: 16px;
  }
}