/* Kalibrate Science Chatbot Widget */

/* FAB Button */
#kb-chat-fab {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: none;
  background: var(--mint, #77FDC7);
  color: var(--dark, #242424);
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(36, 36, 36, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
  z-index: 9998;
}

#kb-chat-fab:hover {
  transform: scale(1.08);
  box-shadow: 0 6px 24px rgba(36, 36, 36, 0.25);
}

#kb-chat-fab.kb-hidden {
  opacity: 0;
  pointer-events: none;
  transform: scale(0.8);
}

/* Chat Panel */
#kb-chat-panel {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 380px;
  height: 540px;
  max-height: calc(100vh - 48px);
  max-width: calc(100vw - 32px);
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 8px 40px rgba(36, 36, 36, 0.15), 0 0 0 1px rgba(160, 158, 161, 0.1);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  z-index: 9999;
  opacity: 0;
  transform: translateY(16px) scale(0.95);
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
}

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

/* Header */
.kb-chat-header {
  background: var(--dark, #242424);
  color: #fff;
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}

.kb-chat-header-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.kb-chat-header-icon {
  font-size: 1.5rem;
}

.kb-chat-header-title {
  font-weight: 600;
  font-size: 0.95rem;
}

.kb-chat-header-subtitle {
  font-size: 0.75rem;
  color: var(--gray, #A09EA1);
}

.kb-chat-close {
  background: none;
  border: none;
  color: var(--gray, #A09EA1);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0 4px;
  line-height: 1;
  transition: color 0.2s;
}

.kb-chat-close:hover {
  color: #fff;
}

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

.kb-chat-welcome {
  margin-bottom: 8px;
}

.kb-chat-welcome p {
  font-size: 0.875rem;
  color: #666;
  line-height: 1.5;
  margin-bottom: 12px;
}

/* Suggestions */
.kb-chat-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.kb-chat-suggestion {
  background: #fff;
  border: 1px solid rgba(160, 158, 161, 0.3);
  border-radius: 16px;
  padding: 6px 12px;
  font-size: 0.8rem;
  color: var(--dark, #242424);
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}

.kb-chat-suggestion:hover {
  background: var(--mint, #77FDC7);
  border-color: var(--mint, #77FDC7);
}

/* Chat Bubbles */
.kb-chat-bubble {
  max-width: 85%;
  padding: 10px 14px;
  border-radius: 14px;
  font-size: 0.875rem;
  line-height: 1.5;
  word-wrap: break-word;
  white-space: pre-wrap;
}

.kb-chat-user {
  align-self: flex-end;
  background: var(--dark, #242424);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.kb-chat-assistant {
  align-self: flex-start;
  background: #fff;
  color: var(--dark, #242424);
  border: 1px solid rgba(160, 158, 161, 0.15);
  border-bottom-left-radius: 4px;
}

/* Loading dots */
.kb-chat-loading {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 12px 18px;
}

.kb-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gray, #A09EA1);
  animation: kb-bounce 1.2s infinite ease-in-out;
}

.kb-dot:nth-child(2) {
  animation-delay: 0.15s;
}

.kb-dot:nth-child(3) {
  animation-delay: 0.3s;
}

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

/* Input Area */
.kb-chat-input-area {
  display: flex;
  padding: 12px;
  gap: 8px;
  border-top: 1px solid rgba(160, 158, 161, 0.15);
  background: #fff;
  flex-shrink: 0;
}

.kb-chat-input {
  flex: 1;
  border: 1px solid rgba(160, 158, 161, 0.3);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 0.875rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s;
  background: #fafafa;
}

.kb-chat-input:focus {
  border-color: var(--mint, #77FDC7);
  background: #fff;
}

.kb-chat-send {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: none;
  background: var(--mint, #77FDC7);
  color: var(--dark, #242424);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
  flex-shrink: 0;
}

.kb-chat-send:hover {
  background: #65e8b5;
}

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

/* Mobile */
@media (max-width: 480px) {
  #kb-chat-panel {
    bottom: 0;
    right: 0;
    width: 100vw;
    height: 100vh;
    max-height: 100vh;
    max-width: 100vw;
    border-radius: 0;
  }

  #kb-chat-fab {
    bottom: 16px;
    right: 16px;
  }
}

/* Scrollbar */
.kb-chat-messages::-webkit-scrollbar {
  width: 5px;
}

.kb-chat-messages::-webkit-scrollbar-track {
  background: transparent;
}

.kb-chat-messages::-webkit-scrollbar-thumb {
  background: rgba(160, 158, 161, 0.3);
  border-radius: 3px;
}

.kb-chat-messages::-webkit-scrollbar-thumb:hover {
  background: rgba(160, 158, 161, 0.5);
}