/* Buyer viewport integration; chat appearance is shared with the merchant site. */
body.smchat-viewport{position:fixed;inset:0;width:100%;height:100dvh;overflow:hidden}
body.smchat-viewport main{min-height:0!important}
body.smchat-viewport .smchat{grid-template-rows:minmax(0,1fr);overscroll-behavior:none}
body.smchat-viewport .smchat-main,body.smchat-viewport .smchat-aside{overflow:hidden}
body.smchat-viewport .smchat-messages{flex:1 1 0;overflow-y:auto;overflow-anchor:none;-webkit-overflow-scrolling:touch}