:root {
    --bg-color: #000000;
    --text-color: #ffffff;
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body,
html {
    width: 100%;
    min-height: 100%;
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    overflow-x: hidden;
    /* Prevent horizontal scroll */
}

#presentation {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.slide {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0;
    /* Remove padding to let images touch edges if needed */
    margin-bottom: 0;
    /* No gap between slides */
}

.content {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

img {
    max-width: 100%;
    height: auto;
    /* Maintain aspect ratio */
    display: block;
    /* Remove bottom space */
}

/* Mobile Adjustments */
@media (max-width: 600px) {
    .slide {
        padding: 0;
    }
}