[문의] 배경이나 본문 여백 어떻게줄여야되나요?

흰색배경,

아래쪽 하늘색배경이 자리를 너무많이차지해서

조금 작게하려고하는데 어떻게해야될까요? 코드로보기힘들어서, html모드말고 일반모드에서 백스페로 지우다보면 코드도 지워지는거같더라고요

<div style="width: 450px;border:1px solid black;font-size:15px;'"><div><img src="https://upload3.inven.co.kr/upload/2021/10/15/bbs/i16061955214.png" width="100%"><br></div><br><div style="width: 0px; height: 0px; display: inline-block;"><br><br><div style="width: 450px;"><br><div style="background: url(https://upload3.inven.co.kr/upload/2021/10/15/bbs/i14283750766.jpg) no-repeat center / 100%; margin: 0px auto; border-radius: 80px; top: -90px; width: 146px; height: 146px; overflow: hidden; position: relative;"><br><div style="transition:0.4s; width: 146px; height: 146px; color: rgba(255, 255, 255, 0); vertical-align: middle; display: table-cell;" data-inven-out-css="{'_SELF_':{'background-color':'rgba(255,255,255,0)','color':'rgba(255,255,255,0)'}}" data-inven-over-css="{'_SELF_':{'background-color':'rgba(255,255,255,0.4)','color':'rgba(55,55,55,1)'}}" data-inven-toggle="sealing"><br><div style="padding: 1em; text-align: center; font-size: 15px;"><br>인장 보기<br></div></div></div></div></div><br><br><br><div style="background-color:lightblue;"><br><div style="height: 60px;"></div><br><br><br><div style="padding: 1em; text-align: center; display: none;transition:0.4s;" data-inven-id="sealing"><br><br>시즌1: 아바타만드는게 소소한취미였음.<br><br><br><br>http://www.inven.co.kr/board/lostark/4823/32176<br><br>http://www.inven.co.kr/board/lostark/4823/32242<br><br><br><br><br><br><br><img src="https://upload3.inven.co.kr/upload/2021/01/16/bbs/i13894105336.jpg" width="95%"><br><br><img src="https://upload3.inven.co.kr/upload/2020/08/14/bbs/i14509939323.jpg" width="95%"><br><br><img src="https://upload3.inven.co.kr/upload/2020/08/14/bbs/i15154616842.jpg" width="95%"><br><br></div><br><br><div style="padding: 1em;text-align: center;"><br>#오버워치    #로스트아크    #브롤스타즈<br></div><br><div style="padding: 1em; text-align: center;"><br><div style="background: url(https://upload3.inven.co.kr/upload/2021/10/15/bbs/i13276844627.png); margin: 0px 15px; border-radius: 10px; border: 3px solid white; border-image: none; width: 92px; height: 92px; overflow: hidden; display: inline-block;"><br><div style="transition:0.4s; width: 92px; height: 92px; color: rgba(255, 255, 255, 0); vertical-align: middle; display: table-cell;" data-inven-out-css="{'_SELF_':{'background-color':'rgba(255,255,255,0)','color':'rgba(255,255,255,0)'}}" data-inven-over-css="{'_SELF_':{'background-color':'red','color':'rgba(255,255,255,1)'}}"><br><div style="padding: 0.5em;font">가입일<br><br><span style="font-weight:bold;">D + </span><span data-inven-dday="2014-08-22" style="font-weight:bold;"></span><br><br></div></div></div><div style="background: url(https://upload3.inven.co.kr/upload/2021/10/15/bbs/i15493199865.png); margin: 0px 15px; border-radius: 10px; border: 3px solid white; border-image: none; width: 92px; height: 92px; overflow: hidden; display: inline-block;"><br><div style="transition:0.4s; width: 92px; height: 92px; color: rgba(255, 255, 255, 0); vertical-align: middle; display: table-cell;" data-inven-out-css="{'_SELF_':{'background-color':'rgba(255,255,255,0)','color':'rgba(255,255,255,0)'}}" data-inven-over-css="{'_SELF_':{'background-color':'blue','color':'rgba(255,255,255,1)'}}"><br><div data-inven-action="" data-inven-nick-default="Gpain" style="border:0px;padding:0;margin:0;"><br><span data-inven-attr-for="input" style="display:none;"></span><br><span data-inven-attr-for="last-attack-all" style="background-color:rgba(255,255,255,0); width: 92px; height: 92px; color: rgba(255, 255, 255, 0);border-radius:123px;padding:0;margin:0;transition:0.4s;border:0px;font-family: 'Jeju Gothic', sans-serif;font-size:15px;" data-inven-text="마격" data-inven-over-css="{'_SELF_':{'color':'rgba(255,255,255,1)'}}" data-inven-out-css="{'_SELF_':{'color':'rgba(255,255,255,0)'}}"></span><br></div></div></div><div style="background: url(https://upload3.inven.co.kr/upload/2021/10/15/bbs/i13288382426.png); margin: 0px 15px; border-radius: 10px; border: 3px solid white; border-image: none; width: 92px; height: 92px; overflow: hidden; display: inline-block;"><br><div style="transition:0.4s; width: 92px; height: 92px; color: rgba(255, 255, 255, 0); vertical-align: middle; display: table-cell;" data-inven-out-css="{'_SELF_':{'background-color':'rgba(255,255,255,0)','color':'rgba(255,255,255,0)'}}" data-inven-over-css="{'_SELF_':{'background-color':'green','color':'rgba(255,255,255,1)'}}"><br><div data-inven-action="" data-inven-nick-default="Gpain" style="border:0px;padding:0;margin:0;"><br><span data-inven-attr-for="input" style="display:none;"></span><br><span data-inven-attr-for="send-note" style="background-color:rgba(255,255,255,0); width: 92px; height: 92px; color: rgba(255, 255, 255, 0);border-radius:123px;padding:0;margin:0;transition:0.4s;border:0px;font-family: 'Jeju Gothic', sans-serif;font-size:15px;" data-inven-text="쪽지" data-inven-over-css="{'_SELF_':{'color':'rgba(255,255,255,1)'}}" data-inven-out-css="{'_SELF_':{'color':'rgba(255,255,255,0)'}}"></span><br></div></div></div><br><br></div></div></div>