.block_horny {
    padding: 0em 0em;
}
.horny-heading {
    text-align: center;
    color: #ec1455;
    font-size: 2em;
    font-weight: bold;
    margin: 1.25em 0;
}

.slider-wrapper {
    width: 100%;
    max-width: 24.5em; /* hoặc 600px */
    overflow: hidden;
    margin: auto;
    position: relative;
    height: 8.5em;
    font-size: 1em;
}

.slider-track {
    position: absolute;
    top: 0;
    left: 0;
    display: flex;
}

.image-card {
    /* flex: 0 0 18%; 4 ảnh */
    position: relative;
    height: 8em;
    flex-shrink: 0;
    box-sizing: border-box;
}

.image-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.online-indicator {
    position: absolute;
    bottom: 0.3em;
    right: 0.3em;
    display: flex;
    align-items: center;
    /* background-color: rgba(255, 255, 255, 0.8); */
    padding: 0.2em 0.4em;
    border-radius: 1em;
    font-size: 0.6em;
    font-weight: bold;
    color: #fff;
    z-index: 2;
  }

  .online-indicator span {
    width: 0.8em;
    height: 0.8em;
    background-color: #0f0;
    border-radius: 50%;
    display: inline-block;
    margin-right: 0.3em;
  }
    

@media (min-width: 768px) {
    .horny-heading {
        font-size: 0.7em
    }
    .slider-wrapper {
        height: 5.5em;
        font-size: 0.8em;
    }

    .image-card {
        height: 5em;
    }

    .block_horny {
        font-size: 2.5em;
    }
    .online-indicator {
        font-size: 0.35em;
    }
}

@media (min-width: 921px) { 
    .slider-wrapper {
        height: 4.5em;
    }
    .image-card {
        height: 4em;
    }
}

@media (min-width: 1200px) {
    .block_horny {
        font-size: 0.9em;
    }
    .slider-wrapper {
        max-width: 68em;
        height: 8.5em;
        font-size: 0.45em
    }

    .image-card {
        flex: -1 0 18%; /* 4 ảnh */
        height: 8em;
    }

    .online-indicator {
        font-size: 0.4em;
    }
}