* {
    box-sizing: border-box;
}

body {
    background: #1c1e22;
    color: #fff;
}

.support-warning {
    background: #ccb11c;
    color: #000;
    display: block;
    font-family: 'Raleway', sans-serif;
    font-weight: 700;
    opacity: 0.95;
    padding: 3rem;
    position: fixed;
    text-align: center;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 5;
}

.support-warning a {
    color: inherit;
}

.support-warning {
    background: #ccb11c;
    color: #000;
    display: block;
    font-family: 'Raleway', sans-serif;
    font-weight: 700;
    opacity: 0.95;
    padding: 3rem;
    position: fixed;
    text-align: center;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 5;
}

.support-warning a {
    color: inherit;
}

.l-grid {
    display: flex;
    flex-wrap: wrap;
}

.l-grid > .l-grid__item {
    flex: 1 0 auto;
}

.l-grid--4x4 > .l-grid__item {
    width: 25%;
}

@supports(display: grid) {
    .support-warning {
         display: none;
    }
    .l-grid--4x4 > .l-grid__item {
        width: auto;
    }
    
    .l-grid {
         display: grid;
    }
}

.l-grid--4x4 {
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(3, minmax(13rem, 1fr));
}

.l-span-column-2 {
    grid-column-start: span 2;
}

.l-span-row-2 {
    grid-row-start: span 2;
}

.l-full-height {
    min-height: 100vh;
}

.align-center {
    align-items: center;
    justify-content: center;
}

.content {
    padding: 3.5rem;
    max-width: 400px;
}

.l-grid--4x4 {
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(3, minmax(13rem, 1fr));
}

.l-span-column-2 {
    grid-column-start: span 2;
}

.l-span-row-2 {
    grid-row-start: span 2;
}

.l-full-height {
    min-height: 100vh;
}

.align-center {
    align-items: center;
    justify-content: center;
}

.content {
    padding: 3.5rem;
    max-width: 400px;
}

.heading {
    font-family: '?', serif;
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

.description {
    font-family: '?', sans-serif;
    font-size: 1rem;
    line-height: 1.5;
}

.theme-blue__black{
    background-color:blue;
    color: #000;
}

.theme-red__white{
    background-color:red;
    color: white;
}

.theme-green__blue{
    background-color:green;
    color: blue;
}

.img-background {
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center center;
    color: #fff;
}

.img-background--sea {
    background-image: linear-gradient( rgba(0, 0, 0, 0.2), rgba(0, 0, 0, 0.2)), url("https://sun9-25.userapi.com/impg/E6kHMX5lMOE36u5IxykI-u0iRN_Ww4GPw1wgUQ/kBtw1OsAI7s.jpg?size=1200x799&quality=96&sign=e856373bba34ed57ddf97a2551d9b26d&type=album");
}

.img-background--wave {
    background-image: linear-gradient( rgba(0, 0, 0, 0.2), rgba(0, 0, 0, 0.2)), url("https://sun9-69.userapi.com/impg/b--jlylXCoLOHSKZTqxFq0bhrRt5iOgj9lMZJg/uJrEl2PxZfk.jpg?size=2560x1707&quality=96&sign=0557b4ff63273389af9c04f9fb3fa7dd&type=album");
}

.img-background--horizon {
    background: linear-gradient( rgba(0, 0, 0, 0.2), rgba(0, 0, 0, 0.2)), url("https://sun9-23.userapi.com/impg/E83TNh_TvLxKFfaSTZpGB8JP1_6Ux8N0_bcczQ/1frtbyuUIVw.jpg?size=2560x1702&quality=96&sign=59399f0b4de32a89add9fe1659196115&type=album");
    background-size: cover;
    background-repeat: no-repeat;
    color: #fff;
}