body, html {
    height: 100%;
}

body {
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 300 234'%3E%3Cpath d='M0 0h300L0 234z' fill='%230fa0ea'/%3E%3C/svg%3E") left top/auto 100% no-repeat;
}

form {
    display: flex;
    justify-content: center;
    align-items: center;
}

div.box {
    max-width: 350px;
    margin: 7em auto 1em auto;
    padding: 2em;
}

div.box h2 {
    text-align: left;
    border-radius: 0;
    box-shadow: none;
    line-height: initial;
    height: auto;
}

#logo-small {
    width: 3.5em;
    height: 3.5em;
    background-repeat: no-repeat;
    background-size: auto;
    flex: 0 0 3.5em;
}

p {
    font-size: 0.8em;
    margin-bottom: 2em;
}

a {
    display: block;
    color: #ccc;
    text-align: center;
    margin: 0.8em 0;
    font-size: 0.8em;
}

/* start button app style */
.box {
    position: relative;
}

.app-btn-content {
    position: absolute;
    display: flex;
    justify-content: center;
    width: 100%;
    height: auto;
    top: -4.5rem;
    left: 0;
    user-select: none;
    -webkit-user-select: none;
    -ms-user-select: none;
    -moz-user-select: none;
}

.app-btn-content > .app-btn {
    color: white;
    background-color: #014284;
    padding: 10px 20px;
    border-radius: 10px;
    cursor: pointer;
    display: none;
    transition-duration: .2s;
}

.app-btn-content > .app-btn:hover {
    background-color: #1b5a9d;
    transform: scale(1.01);
}

.app-btn-content > .app-btn-show {
    display: inline;
}