styles.css

body, html {
    margin: 0;
    padding: 0;
    height: 100%;
    font-family: Arial, sans-serif;
}

.presentation {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background-color: #f2f2f2;
}

.slide {
    width: 80%;
    height: 80%;
    display: none;
    text-align: center;
    padding: 20px;
    box-sizing: border-box;
    background-color: #000;
    color: #fff;
    border-radius: 10px;
    opacity: 0;
    transition: opacity 1s ease-in-out;
}

.slide.active {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    opacity: 1;
}

h1 {
    font-size: 32px;
    margin-bottom: 10px;
}

p {
    font-size: 18px;
}

.arrow {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    font-size: 48px;
    color: #333;
    cursor: pointer;
    user-select: none;
    z-index: 999;
}

.arrow-prev {
    left: 30px;
}

.arrow-next {
    right: 30px;
}