* {
     box-sizing-border: box;
}
.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;
}

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

.grid--4x4 > .grid__item {
     flex: 1 0 auto;   
}

@supports(display: grid) {
     .support-warning {
          display: none;
     }
     
     .grid {
         display: grid;
     }
     
}

.grid--4x4 {
     grid-template-columns: 1fr 1fr;
     grid-template-rows: repeat(auto-fit, minmax(50vh, auto) minmax(50vh, auto));
}

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

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

.heading {
     font-family: 'Playfair Display', serif;
     font-size: 2rem;
     font-weight: 700;
     line-height: 1.2;
     margin-bottom: 1rem;
}

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

/* Синяя тема */
.theme-blue {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    color: #ffffff;
}

.theme-blue .icon {
    color: #a3d5ff;
}

.theme-blue .tag {
    background-color: rgba(163, 213, 255, 0.25);
    color: #e6f2ff;
}

/* Зеленая тема */
.theme-green {
    background: linear-gradient(135deg, #0f9b0f 0%, #3db33d 100%);
    color: #ffffff;
}

.theme-green .icon {
    color: #a8e6a8;
}

.theme-green .tag {
    background-color: rgba(168, 230, 168, 0.25);
    color: #e6f9e6;
}

/* Оранжевая тема */
.theme-orange {
    background: linear-gradient(135deg, #ff7e5f 0%, #feb47b 100%);
    color: #000000;
}

.theme-orange .icon {
    color: #ffd1b3;
}

.theme-orange .tag {
    background-color: rgba(255, 209, 179, 0.4);
    color: #332211;
}

/* Фиолетовая тема */
.theme-purple {
    background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
    color: #ffffff;
}

.theme-purple .icon {
    color: #d9c2ff;
}

.theme-purple .tag {
    background-color: rgba(217, 194, 255, 0.25);
    color: #f3e6ff;

}