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

body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    overflow: hidden;
    height: 100vh;
}

.slideshow-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 2s ease-in-out;
}

.slide.active {
    opacity: 1;
}

.slide picture,
.slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.slide img {
    will-change: transform;
    backface-visibility: hidden;
    transform: translateZ(0);
}

/* Slide 1: Elephant ride - slow pan right to left, gentle zoom */
.slide-1 img {
    animation: kenburns-elephant 20s ease-in-out infinite alternate;
}

@keyframes kenburns-elephant {
    0% {
        transform: scale(1) translate(0, 0);
    }
    100% {
        transform: scale(1.15) translate(-3%, -2%);
    }
}

/* Slide 2: Podium - gentle zoom on center chimp */
.slide-2 img {
    animation: kenburns-podium 20s ease-in-out infinite alternate;
}

@keyframes kenburns-podium {
    0% {
        transform: scale(1) translate(0, 0);
    }
    100% {
        transform: scale(1.12) translate(0, 0);
    }
}

/* Slide 3: Congress - subtle pan down with gentle zoom */
.slide-3 img {
    animation: kenburns-congress 20s ease-in-out infinite alternate;
}

@keyframes kenburns-congress {
    0% {
        transform: scale(1) translate(0, 0);
    }
    100% {
        transform: scale(1.15) translate(0, 3%);
    }
}

/* Text Overlay */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 10;
    color: white;
    text-align: center;
    background: rgba(0, 0, 0, 0.3);
    padding: 20px;
}

.overlay h1 {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 10px rgba(0, 0, 0, 0.5);
    letter-spacing: 2px;
    will-change: opacity, transform;
    backface-visibility: hidden;
    transition: opacity 0.3s ease-out, transform 0.3s ease-out;
}

/* Question animation - uncertain, wavering */
.overlay h1.question-enter {
    animation: question-appear 0.6s ease-out forwards;
}

@keyframes question-appear {
    0% {
        opacity: 0;
        transform: scale(0.95) translateY(10px);
    }
    50% {
        opacity: 0.7;
        transform: scale(0.98) translateY(-2px);
    }
    100% {
        opacity: 0.85;
        transform: scale(1) translateY(0);
    }
}

/* Answer animation - bold, confident */
.overlay h1.answer-enter {
    animation: answer-appear 0.8s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

@keyframes answer-appear {
    0% {
        opacity: 0;
        transform: scale(0.8);
    }
    60% {
        opacity: 1;
        transform: scale(1.05);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

.overlay p {
    font-size: 1.5rem;
    font-weight: 300;
    text-shadow: 1px 1px 5px rgba(0, 0, 0, 0.5);
    letter-spacing: 1px;
}

/* Responsive */
@media (max-width: 768px) {
    .overlay h1 {
        font-size: 2.5rem;
    }

    .overlay p {
        font-size: 1.2rem;
    }
}