.custom-collapse{border:1px solid #ddd;border-radius:8px;margin:20px 0;overflow:hidden}.custom-collapse-toggle{background:#f5f5f5;border:none;cursor:pointer;font-size:16px;font-weight:600;padding:14px 18px;text-align:left;width:100%}.custom-collapse-content{max-height:0;overflow:hidden;padding:0 18px;transition:max-height .3s ease}.custom-collapse-content.open{max-height:3000px;padding:18px}