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

body {
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    overflow: hidden;
    height: 100vh;
    width: 100vw;
}

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

.background-slider img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transform: scale(1.1);
    filter: blur(0px);
    transition: opacity 1.5s cubic-bezier(0.4, 0, 0.2, 1), 
                transform 1.5s cubic-bezier(0.4, 0, 0.2, 1),
                filter 1.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.background-slider img.active {
    opacity: 1;
    transform: scale(1);
    filter: blur(0px);
}

.background-slider img:not(.active) {
    filter: blur(2px);
}

.dark-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        to bottom,
        rgba(0, 0, 0, 0.4) 0%,
        rgba(0, 0, 0, 0.5) 50%,
        rgba(0, 0, 0, 0.7) 80%,
        rgba(0, 0, 0, 0.85) 100%
    );
    z-index: 2;
}

.content {
    position: relative;
    z-index: 3;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    width: 100%;
    padding: 2rem;
}

.logo-container {
    margin-bottom: 3rem;
    animation: fadeInUp 1s ease-out;
}

.logo {
    width: 150px;
    height: auto;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.3));
}

.text-content {
    text-align: center;
    color: white;
    animation: fadeInUp 1s ease-out 0.3s both;
}

.main-title {
    font-size: 4rem;
    font-weight: 300;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.subtitle {
    font-size: 1.5rem;
    font-weight: 300;
    letter-spacing: 0.05em;
    opacity: 0.9;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.thumbnails-container {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    z-index: 4;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1.5rem;
    gap: 0.75rem;
    background: linear-gradient(
        to top,
        rgba(0, 0, 0, 0.25) 0%,
        rgba(0, 0, 0, 0.15) 30%,
        rgba(0, 0, 0, 0.2) 60%,
        transparent 100%
    );
    pointer-events: none;
}

.thumbnails-container.active {
    pointer-events: all;
}

.thumbnail {
    width: 80px;
    height: 60px;
    object-fit: cover;
    border-radius: 8px;
    cursor: pointer;
    opacity: 0.6;
    transition: all 0.17s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.thumbnail:hover {
    opacity: 0.9;
    transform: translateY(-6px) scale(1.05);
    border-color: rgba(255, 255, 255, 0.4);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.6), 0 0 0 2px rgba(255, 255, 255, 0.1);
}

.thumbnail.active {
    opacity: 1;
    border-color: white;
    border-width: 3px;
    transform: translateY(-6px) scale(1.08);
    box-shadow: 0 8px 24px rgba(255, 255, 255, 0.4), 
                0 0 0 3px rgba(255, 255, 255, 0.2);
}

/* Responsive design */
@media (max-width: 768px) {
    .main-title {
        font-size: 2.5rem;
    }
    
    .subtitle {
        font-size: 1.2rem;
    }
    
    .logo {
        width: 120px;
    }
    
    .thumbnails-container {
        padding: 1rem;
        gap: 0.5rem;
        overflow-x: auto;
        scrollbar-width: none;
        -ms-overflow-style: none;
    }
    
    .thumbnails-container::-webkit-scrollbar {
        display: none;
    }
    
    .thumbnail {
        width: 60px;
        height: 45px;
        flex-shrink: 0;
    }
}

@media (max-width: 480px) {
    .main-title {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .logo {
        width: 100px;
    }
    
    .thumbnails-container {
        padding: 0.75rem;
        gap: 0.4rem;
    }
    
    .thumbnail {
        width: 50px;
        height: 38px;
    }
}