{
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background: #1c1e22;
    color: #fff;
    font-family: 'Open Sans', sans-serif;
    line-height: 1.6;
}

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));
    grid-gap: 0;
}

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

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


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

description {
    font-family: 'Open Sans', sans-serif;
    font-size: 1rem;
    line-height: 1.5;
    margin-bottom: 1.5rem;
}

description a {
    color: #ff6b6b;
    text-decoration: none;
    transition: color 0.3s ease;
}

description a:hover {
    color: #ff8e8e;
    text-decoration: underline;
}


theme-blue {
    background: #3498db;
    color: #fff;
}

theme-navy {
    background: #2c3e50;
    color: #fff;
}

theme-teal {
    background: #1abc9c;
    color: #fff;
}


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

img-background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    z-index: 0;
}

img-background content {
    position: relative;
    z-index: 1;
}

img-background--sea {
    background-image: linear-gradient(rgba(0, 0, 0, 0.2), rgba(0, 0, 0, 0.2)), url('https://github.com/vikaakkerman/pr4/blob/721253ebb65341564a3a348704c350cf6247b640/background--sea.jpg');
}

img-background--wave {
    background-image: linear-gradient(rgba(0, 0, 0, 0.2), rgba(0, 0, 0, 0.2)), url('https://github.com/vikaakkerman/pr4/blob/1b728a29069f9f85ae5865ca2da181fa36bd9856/background--wave.jpg');
}

img-background--horizon {
    background-image: linear-gradient(rgba(0, 0, 0, 0.2), rgba(0, 0, 0, 0.2)), url('https://github.com/vikaakkerman/pr4/blob/f16c36b0980c0f39d0f1e5cc3382ea9f9c120d07/background--horizon.jpg');
}