@keyframes fabPulse {
  0%, 100% { transform: scale(1); opacity: 0.3; }
  50% { transform: scale(1.15); opacity: 0; }
}
@keyframes chatSlideIn {
  from { opacity: 0; transform: translateY(16px) scale(0.95); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.chat-fab { position: fixed; bottom: 32px; right: 32px; z-index: 999; }
.chat-fab__btn { width: 60px; height: 60px; border-radius: 50%; background: linear-gradient(135deg, var(--color-primary) 0%, #0077B6 100%); color: #fff; font-size: 26px; display: flex; align-items: center; justify-content: center; border: none; cursor: pointer; box-shadow: 0 8px 24px rgba(0, 168, 232, 0.35); transition: all var(--transition-normal); position: relative; }
.chat-fab__btn::before { content: ""; position: absolute; inset: -6px; border-radius: 50%; background: linear-gradient(135deg, var(--color-primary) 0%, #0077B6 100%); opacity: 0.3; animation: fabPulse 2.5s ease-in-out infinite; z-index: -1; }
.chat-fab__btn:hover { transform: scale(1.05); }
.chat-fab__tooltip { position: absolute; right: 72px; top: 50%; transform: translateY(-50%); background: var(--color-bg-white); color: var(--color-text-primary); font-size: 13px; font-weight: 500; padding: 8px 16px; border-radius: 10px; box-shadow: var(--shadow-card); white-space: nowrap; opacity: 0; pointer-events: none; transition: opacity var(--transition-fast); }
.chat-fab__btn:hover + .chat-fab__tooltip, .chat-fab:hover .chat-fab__tooltip { opacity: 1; }

.chat-window { position: fixed; bottom: 100px; right: 32px; width: 380px; max-height: 520px; background: var(--color-bg-white); border-radius: var(--radius-card-lg); box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15); z-index: 999; display: none; flex-direction: column; overflow: hidden; animation: chatSlideIn 0.3s ease-out; }
.chat-window.active { display: flex; }
.chat-window__header { background: linear-gradient(135deg, var(--color-primary) 0%, #0077B6 100%); color: #fff; padding: 20px; display: flex; align-items: center; justify-content: space-between; }
.chat-window__header-info { display: flex; align-items: center; gap: 12px; }
.chat-window__avatar { width: 36px; height: 36px; background: rgba(255, 255, 255, 0.2); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 18px; }
.chat-window__name { font-size: 15px; font-weight: 600; }
.chat-window__status { font-size: 12px; opacity: 0.8; }
.chat-window__close { background: none; border: none; color: #fff; font-size: 20px; cursor: pointer; opacity: 0.8; transition: opacity var(--transition-fast); padding: 4px; min-width: 44px; min-height: 44px; }
.chat-window__close:hover { opacity: 1; }
.chat-window__quick { padding: 16px; border-bottom: 1px solid var(--color-border); }
.chat-window__quick-title { font-size: 12px; color: var(--color-text-tertiary); margin-bottom: 10px; }
.chat-window__quick-list { display: flex; flex-wrap: wrap; gap: 8px; }
.chat-window__quick-btn { padding: 8px 16px; background: var(--color-primary-light); color: var(--color-primary); font-size: 13px; font-weight: 500; border-radius: var(--radius-tag); border: none; cursor: pointer; transition: all var(--transition-fast); min-height: 36px; display: inline-flex; align-items: center; }
.chat-window__quick-btn:hover { background: var(--color-primary); color: #fff; }
.chat-window__quick-btn--solution { background: var(--color-primary); color: #fff; font-weight: 600; }
.chat-window__quick-btn--solution:hover { background: #0077B6; }
.chat-window__body { flex: 1; padding: 20px; overflow-y: auto; min-height: 200px; }
.chat-window__msg { margin-bottom: 16px; }
.chat-window__msg--bot { display: flex; gap: 10px; }
.chat-window__msg-avatar { width: 28px; height: 28px; background: var(--color-primary-light); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 14px; color: var(--color-primary); flex-shrink: 0; }
.chat-window__msg-bubble { background: var(--color-bg-gray); padding: 12px 16px; border-radius: 16px 16px 16px 4px; font-size: 14px; color: var(--color-text-secondary); line-height: 1.6; max-width: 280px; }
.chat-window__msg--user { display: flex; justify-content: flex-end; }
.chat-window__msg-bubble--user { background: var(--color-primary); color: #fff; padding: 12px 16px; border-radius: 16px 16px 4px 16px; font-size: 14px; line-height: 1.6; max-width: 280px; }
.chat-window__input-area { padding: 16px; border-top: 1px solid var(--color-border); display: flex; gap: 10px; }
.chat-window__input { flex: 1; padding: 10px 16px; border: 1px solid var(--color-border); border-radius: var(--radius-tag); font-size: 14px; font-family: inherit; outline: none; transition: border-color var(--transition-fast); }
.chat-window__input:focus { border-color: var(--color-primary); }
.chat-window__send { width: 44px; height: 44px; background: var(--color-primary); color: #fff; border: none; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 16px; cursor: pointer; transition: background var(--transition-fast); }
.chat-window__send:hover { background: #0077B6; }

@media (max-width: 767px) {
  .chat-fab { bottom: 24px; right: 24px; }
  .chat-fab__btn { width: 52px; height: 52px; font-size: 22px; }
  .chat-window { right: 16px; left: 16px; width: auto; bottom: 96px; }
}