matrix-bot/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_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;
    padding: 25px 35px;
    color: #2e2f32;
}

.mx_Logo {
    height: 54px;
    margin-top: 2px;
}

.mx_ButtonGroup {
    margin-top: 10px;
}

.mx_ButtonRow {
    display: -webkit-box;
    display: -webkit-flex;
    display: -ms-flexbox;
    display: flex;
    -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;
    box-sizing: border-box;
    margin: 12px 0 0;
}

.mx_ButtonRow > * {
    margin: 0 10px;
}

.mx_ButtonRow > *:first-child {
    margin-left: 0;
}

.mx_ButtonRow > *:last-child {
    margin-right: 0;
}

.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_ButtonHeadline {
    margin-bottom: 14px;
}

.mx_ButtonLabel {
    margin-left: 20px;
}

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

.mx_Header_title {
    font-size: 24px;
    font-weight: 600;
    margin: 20px 0 0;
}

.mx_Header_subtitle {
    font-size: 12px;
    font-weight: normal;
    margin: 8px 0 0;
}

.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_Header_title">_t("Welcome to Riot.im")</h1>
    <h4 class="mx_Header_subtitle">_t("Decentralised, encrypted chat &amp; collaboration powered by [matrix]")</h4>
    <div class="mx_ButtonGroup">
        <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>
                <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>
                <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>