main.css

@import url("https://cdn.msar.me/fonts/kalpurush/font.css");
* {
    margin: 0;
    padding: 0;
    -webkit-overflow-scrolling: touch;
}

a {
    color: #eee;
    text-decoration: none;
}

html,
body {
    height: 100%;
    font: 14px/25px "Avenir", "Arial", "sans-serif";
}

#wrapper {
    background: #fbfbfb;
    height: 100%;
    display: flex;
}

footer {
    width: 20%;
    padding: 10px;
    color: #eee;
    background: #1f1f1f;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

footer .layout-link {
    display: flex;
    flex-direction: column;
}

footer .layout {
    width: 100%;
    height: auto;
    margin: 0;
}

main {
    width: 80%;
    margin: 0 10px;
}
main .content {
    height: 100%;
    display: flex;
    flex-direction: column;
    position: relative;
}
main .content textarea {
    font: 18px/25px "Kalpurush", "Arial", "sans-serif";
    background: transparent;
    width: 100%;
    border: 0;
    resize: none;
    outline: none;
    padding: 20px 0;
    min-height: 200px;
    height: 100%;
    z-index: 99;
}

.layout-bg {
    position: absolute;
    bottom: 0;
    opacity: 0.2;
    width: 100%;
    text-align: center;
    display: flex;
    justify-content: center;
    margin: 0 auto;
    z-index: 11;
}
.layout-bg img {
    width: 75%;
}

footer .wrapper {
    padding: 20px;
}

/* Mobile */
@media all and (max-width: 800px) {
    #wrapper {
        position: relative;
        height: auto !important;
        min-height: 100%;
        flex-direction: column;
    }

    main {
        min-height: 100%;
        width: 100%;
        margin: 0;
    }

    main .content {
        padding: 0px 10px;
        height: 100vh;
        /* border-left: 3px solid #ffa729;
        border-right: 3px solid #ffa729; */
    }

    .sys main .content {
        border-color: #1f1f1f;
    }

    main .content textarea {
        padding-bottom: 0;
        -webkit-tap-highlight-color: none;
    }

    .layout-bg {
        display: none;
    }

    footer {
        width: 100%;
        padding: 0px;
    }
    footer .layout-link {
        margin: 10px;
    }
}

footer .title {
    text-align: right;
    display: flex;
    align-items: center;
    justify-content: flex-end;
}

footer .title span {
    margin-right: 10px;
}

footer .logo {
    height: 40px;
}

footer .social {
    text-align: right;
    height: 32px;
    margin: 10px 0;
    border-top: 1px solid #333;
    padding-top: 10px;
}

footer h2 {
    font-size: 15px;
    font-weight: 600;
    text-transform: uppercase;
    border-bottom: 1px solid #333;
    padding-bottom: 5px;
    margin-bottom: 20px;
}

footer ul li a {
    display: block;
    padding: 5px;
    margin: 5px 0;
}

footer ul li.active a {
    background: #ffa729;
    color: #1f1f1f;
    border-radius: 2px;
}

footer .social img {
    height: 32px;
    width: 32px;
}

/* Checkbox */
input,
textarea,
select,
button,
label {
    margin: 0;
    line-height: normal;
    font-family: inherit;
    font-size: 100%;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}