.cst-chat-btn{position:fixed;bottom:28px;right:28px;width:56px;height:56px;border-radius:50%;background:#0d6efd;color:#fff;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 16px rgba(13,110,253,.45);z-index:9000;transition:background .2s}.cst-chat-btn:hover{background:#0b5ed7}.cst-chat-btn svg{width:26px;height:26px;fill:#fff}.cst-chat-window{position:fixed;bottom:96px;right:28px;width:340px;max-height:500px;display:flex;flex-direction:column;background:#fff;border-radius:14px;box-shadow:0 8px 32px rgba(0,0,0,.18);z-index:9001;overflow:hidden;font-family:'Montserrat',sans-serif}.cst-chat-window.cst-chat-hidden{display:none}.cst-chat-header{background:#0d6efd;color:#fff;padding:14px 16px;font-weight:600;font-size:15px;display:flex;align-items:center;justify-content:space-between}.cst-chat-header-actions{display:flex;align-items:center;gap:8px}.cst-chat-end-btn{background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.4);color:#fff;cursor:pointer;font-size:11px;font-weight:600;border-radius:6px;padding:3px 8px;transition:background .2s}.cst-chat-end-btn:hover{background:rgba(255,255,255,.28)}.cst-chat-header-close{background:none;border:none;color:#fff;cursor:pointer;font-size:20px;line-height:1;padding:0;opacity:.8}.cst-chat-header-close:hover{opacity:1}.cst-chat-name-form{padding:24px 20px;display:flex;flex-direction:column;gap:12px}.cst-chat-name-form p{margin:0;font-size:14px;color:#555}.cst-chat-name-input{border:1px solid #d0d5dd;border-radius:8px;padding:10px 12px;font-size:14px;outline:none;transition:border-color .2s}.cst-chat-name-input:focus{border-color:#0d6efd}.cst-chat-start-btn{background:#0d6efd;color:#fff;border:none;border-radius:8px;padding:10px;font-size:14px;font-weight:600;cursor:pointer;transition:background .2s}.cst-chat-start-btn:hover{background:#0b5ed7}.cst-chat-start-btn:disabled{background:#90b8f8;cursor:not-allowed}.cst-chat-status-bar{padding:8px 16px;font-size:12px;background:#f0f6ff;color:#0d6efd;border-bottom:1px solid #e2ecff;display:none}.cst-chat-messages{flex:1;overflow-y:auto;padding:14px 14px 6px;display:flex;flex-direction:column;gap:8px;min-height:200px}.cst-chat-msg{max-width:80%;padding:8px 12px;border-radius:12px;font-size:13px;line-height:1.45;word-break:break-word}.cst-chat-msg.visitor{align-self:flex-end;background:#0d6efd;color:#fff;border-bottom-right-radius:4px}.cst-chat-msg.operator{align-self:flex-start;background:#f1f3f5;color:#222;border-bottom-left-radius:4px}.cst-chat-msg.system{align-self:center;background:#fff3cd;color:#856404;font-size:12px;border-radius:8px;padding:5px 10px}.cst-chat-input-row{display:flex;gap:8px;padding:10px 12px;border-top:1px solid #eee}.cst-chat-input{flex:1;border:1px solid #d0d5dd;border-radius:8px;padding:8px 10px;font-size:13px;outline:none;transition:border-color .2s;resize:none;height:36px;font-family:inherit}.cst-chat-input:focus{border-color:#0d6efd}.cst-chat-send-btn{background:#0d6efd;color:#fff;border:none;border-radius:8px;padding:0 14px;cursor:pointer;font-size:18px;transition:background .2s;display:flex;align-items:center}.cst-chat-send-btn:hover{background:#0b5ed7}.cst-chat-send-btn:disabled{background:#90b8f8;cursor:not-allowed}.cst-chat-new-btn{margin:8px 12px 10px;background:#f1f3f5;color:#0d6efd;border:1px solid #d0d5dd;border-radius:8px;padding:9px;font-size:13px;font-weight:600;cursor:pointer;transition:background .2s;width:calc(100% - 24px)}.cst-chat-new-btn:hover{background:#e2ecff}@media (max-width:480px){.cst-chat-window{right:0;bottom:0;width:100%;max-height:100dvh;border-radius:14px 14px 0 0}.cst-chat-btn{bottom:18px;right:18px}}