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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background: #0f172a;
    color: #f8fafc;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.presentation-container {
    width: 100%;
    max-width: 1200px;
    min-height: 600px;
    margin: 2rem;
    background: #1e293b;
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.slide {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    text-align: center;
    animation: fadeIn 0.5s ease-in-out;
}

.slide h1 {
    font-size: 3rem;
    font-weight: bold;
    color: #e2e8f0;
    line-height: 1.2;
    max-width: 800px;
}

.emoji {
    font-size: 6rem;
}

.champions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    width: 100%;
}

.champions img {
    width: 300px;
    height: 169px;
    object-fit: cover;
    border-radius: 0.5rem;
    transition: transform 0.3s ease;
}

.champions img:hover {
    transform: scale(1.05);
}

.navigation {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid #334155;
}

.nav-btn {
    background: #475569;
    color: #f8fafc;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.nav-btn:hover:not(:disabled) {
    background: #64748b;
}

.nav-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.progress {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.progress-dot {
    width: 0.75rem;
    height: 0.75rem;
    border-radius: 50%;
    background: #475569;
    transition: all 0.3s ease;
}

.progress-dot.active {
    background: #e2e8f0;
    transform: scale(1.2);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}