element-web/res/welcome.html

<style type="text/css">

/* we deliberately inline style here to avoid flash-of-CSS problems, and to avoid
 * voodoo where we have to set display: none by default
 */

h1::after {
    content: "!";
}

.mx_HomePage_body {
    display: flex;
    flex-direction: column;
    justify-content: center;
    height: 100%;
}

.mx_Parent {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -webkit-flex-direction: column;
  -ms-flex-direction: column;
  flex-direction: column;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  -ms-flex-pack: center;
  justify-content: center;
  -webkit-box-align: center;
  -webkit-align-items: center;
  -ms-flex-align: center;
  align-items: center;
  text-align: center;
  margin-bottom: 50px;
}

.mx_Well {
  display: block;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  -ms-flex-pack: center;
  justify-content: center;
  -webkit-flex-wrap: wrap;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
  -webkit-box-align: center;
  -webkit-align-items: center;
  -ms-flex-align: center;
  align-items: center;
  border-radius: 10px;
  background-color: #F2F5F8;
}

.mx_ButtonParent {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  padding: 10px 20px;
  -webkit-box-orient: horizontal;
  -webkit-box-direction: normal;
  -webkit-flex-direction: row;
  -ms-flex-direction: row;
  flex-direction: row;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  -ms-flex-pack: center;
  justify-content: center;
  -webkit-box-align: center;
  -webkit-align-items: center;
  -ms-flex-align: center;
  align-items: center;
  border-radius: 4px;
  width: 150px;
  background-repeat: no-repeat;
  background-position: 10px center;
  text-decoration: none;
  color: #2e2f32 !important;
}

.mx_ButtonRow {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  width: 480px;
  -webkit-justify-content: space-around;
  -ms-flex-pack: distribute;
  justify-content: space-around;
  -webkit-box-align: center;
  -webkit-align-items: center;
  -ms-flex-align: center;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
  box-sizing: border-box;
  margin: 28px 0;
}

.mx_buttonheadline {
  margin-bottom: 14px;
}

.mx_buttonlabel {
  margin-left: 20px;
}

.mx_buttonwrappertext {
  font-size: 13px;
  margin-bottom: 10px;
}

.mx_Header2 {
  font-size: 32px;
  font-weight: 600;
  margin-top: 40px;
}

.mx_Header22 {
  font-size: 14px;
  font-weight: 200;
  margin-bottom: 40px;
}

.mx_ButtonSignIn {
  background-color: #368BD6;
  color: white !important;
}

.mx_ButtonCreateAccount {
  background-color: #03B381;
  color: white !important;
}

.mx_secondarybutton {
  background-color: #FFFFFF;
  color: #2E2F32;
}

.mx_Button_iconSignIn {
    background-image: url('welcome/images/icon-sign-in.svg');
}
.mx_Button_iconCreateAccount {
    background-image: url('welcome/images/icon-create-account.svg');
}
.mx_Button_iconHelp {
    background-image: url('welcome/images/icon-help.svg');
}
.mx_Button_iconRoomDirectory {
    background-image: url('welcome/images/icon-room-directory.svg');
}

</style>

<div class="mx_Parent">
    <a href="https://riot.im" target="_blank" rel="noopener">
        <img src="welcome/images/logo.svg" alt="" class="mx_logo"/>
    </a>
    <h1 class="mx_Header2">_t("Welcome to Riot.im")</h1>
    <h4 class="mx_Header22">_t("Decentralised, encrypted chat &amp; collaboration powered by [matrix]")</h4>
    <div class="mx_Well">
        <div class="mx_ButtonRow">
            <a href="#/login" class="mx_ButtonParent mx_ButtonSignIn mx_Button_iconSignIn">
                <div class="mx_buttonlabel">_t("Sign In")</div>
            </a>
            <a href="#/register" class="mx_ButtonParent mx_ButtonCreateAccount mx_Button_iconCreateAccount">
                <div class="mx_buttonlabel">_t("Create Account")</div>
            </a>
        </div>
        <div class="mx_ButtonRow">
            <div class="mx_buttonwrapper">
                <div class="mx_buttonwrappertext">_t("Need help?")</div>
                <a href="#/user/@riot-bot:matrix.org?action=chat" class="mx_ButtonParent mx_secondarybutton mx_Button_iconHelp">
                    <div class="mx_buttonlabel">_t("Chat with Riot Bot")</div>
                </a>
            </div>
            <div class="mx_buttonwrapper">
                <div class="mx_buttonwrappertext">_t("Explore rooms")</div>
                <a href="#/directory" class="mx_ButtonParent mx_secondarybutton mx_Button_iconRoomDirectory">
                    <div class="mx_buttonlabel">_t("Room Directory")</div>
                </a>
            </div>
        </div>
    </div>
</div>