.top-image::after {
    background-image: url(../images/backgrounds/placeholder.png);
}

.big-logo {
  position: absolute;
  inset: 0; /* top:0; right:0; bottom:0; left:0 */
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  opacity: 0;
  animation: fadeCycle 45s infinite;
}

.logo-uk { background-image: url('https://test.aveteam.org/test/images/big-logo-uk.png'); animation-delay: 0s; }
.logo-el { background-image: url('https://test.aveteam.org/test/images/big-logo-el.png'); animation-delay: 15s; }
.logo-en { background-image: url('https://test.aveteam.org/test/images/big-logo-en.png'); animation-delay: 30s; }

@keyframes fadeCycle {
  0% { opacity: 0; }
  5% { opacity: 1; }   /* плавно з’являється */
  30% { opacity: 1; }  /* тримається видимою */
  35% { opacity: 0; }  /* плавно зникає */
  100% { opacity: 0; }
}

.image-container {
    width: fit-content;
    margin: 2rem auto;
    top: -5%;
}

.image-container img {
    width: 100%;
    border-radius: 1.5rem;
}

.about-column-text {
    color: var(--logo-blue);
}

.courses-banner {
    background-image: url(https://test.aveteam.org/test/images/decorations/fgtu-book.png);
    background-repeat: no-repeat;
    background-position: right bottom;
    background-size: auto;
    background-size: 30% auto;
}

.news-header-columns {
    width: 100%;
    padding: 10px 0px;
    display: inline-flex;
    gap: 2rem;
}

.news-header-columns .column {
    width: 50% !important;
}

.news-header-columns .column-right {
    justify-content: end;
}

.partner-list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    padding: 20px 0;
    width: 100%;
}

.partner {
    background-color: white;
    aspect-ratio: 1 / 1;
    border: 2px solid var(--accent-color);
    border-radius: 1.5rem;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.partner img {
    width: 80%;
    height: 80%;
    object-fit: contain;
    display: block;
    border-radius: 4px;
}

@media (max-width: 750px) {
    .content {
        gap: 1.5rem;
    }
    
    .about-button {
        width: 100%;
    }
    
    .image-container {
        top: 0;
        margin: 0;
    }
    
    .image-container img {
        width: calc(100vw - 40px);
        border-radius: 1.5rem;
    }
    
    .courses-banner {
        background-size: auto 120%;
        background-position: 63vw 100%;
    }
    
    .partner-list {
        grid-template-columns: repeat(3, 1fr);
        gap: 16px;
    }
}

@media (max-width: 440px) {
    .courses-banner {
        background-image: none;
    }
    
    .news-header-columns {
        flex-direction: column;
        gap: 1rem;
    }
    
    .news-header-columns .column {
        width: 100% !important;
    }
    
    .news-header-columns .column-right {
        justify-content: start;
    }
    
    .news-header {
        font-size: 1.7rem !important;
    }
    
    .list {
        margin-bottom: 10px;
    }
    
    .partner-list {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
}