.img-slide-area {
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
}

.slider {
    width: 100%;
    height: auto;
    border-radius: 10px;
    overflow: hidden;
}

.slides {
    width: 500%;
    height: 100%;
    display: flex;
}

.slides input {
    display: none;
}

.slide {
    width: 20%;
    transition: 2s;
}

.slide img {
    width: 100%;
    height: auto;
}

.navigation-manual {
    width: 100%;
    margin-top: -30px;
    display: flex;
    justify-content: center;
}

.manual-btn {
    border: 2px solid #ccc;
    padding: 5px;
    border-radius: 10px;
    cursor: pointer;
    transition: 1s;
}

.manual-btn:not(:last-child) {
    margin-right: 40px;
}

.manual-btn:hover {
    background-color: #ccc;
}

#radio1:checked~.first {
    margin-left: 0;
}

#radio2:checked~.first {
    margin-left: -20%;
}

#radio3:checked~.first {
    margin-left: -40%;
}

#radio4:checked~.first {
    margin-left: -60%;
}

/* Automatic Navigation */
.navigation-auto {
    position: absolute;
    display: flex;
    width: 100%;
    justify-content: center;
    margin-top: 460px;
}

.navigation-auto div {
    border: 2px solid #333;
    padding: 5px;
    border-radius: 10px;
    transition: 1s;
}

.navigation-auto div:not(:last-child) {
    margin-right: 40px;
}

#radio1:checked~.navigation-auto .auto-btn-1 {
    background: #ccc;
}

#radio2:checked~.navigation-auto .auto-btn-2 {
    background: #ccc;
}


#radio3:checked~.navigation-auto .auto-btn-3 {
    background: #ccc;
}

#radio4:checked~.navigation-auto .auto-btn-4 {
    background: #ccc;
}