#signInBtn {
                transition: all 0.2s ease;
                cursor: pointer;
            }
            
            #signInBtn.sign-in-mode {
                background: #000000;
                color: #fff;
                font-weight: 800;
                padding: 10px 14px;
                border: none;
            }
            
            #signInBtn.sign-in-mode:hover {
                background: #111827;
                transform: scale(1.05);
            }
            
            #signInBtn.signed-in-mode {
                background: transparent;
                color: #ffffff;
                font-weight: 700;
                padding: 8px 12px;
                border: none;
                border-radius: 6px;
                font-size: 13px;
            }

            #signInBtn.signed-in-mode:hover {
                background: rgba(74, 222, 128, 0.1);
                color: #ffffff;
                transform: scale(1.05);
            }

            /* Buy title styles removed to avoid header overlap */