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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-image: url('assets/tumblr_og6l8q8a0H1rn9y41o1_640.jpg');
    background-repeat: repeat;
    background-position: 0 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(3px);
    z-index: 0;
}

.container {
    background: white;
    border-radius: 1rem;
    padding: 2rem 1.5rem;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    max-width: 100%;
    width: 100%;
    position: relative;
    z-index: 1;
}

h1 {
    font-size: 2rem;
    color: #333;
    margin-bottom: 1rem;
}

p {
    font-size: 1rem;
    color: #666;
    margin-bottom: 1.5rem;
}

#imgContainer {
    width: 100%;
    margin-bottom: 1.5rem;
    z-index: 1;
    margin-top: 1.5rem;
    margin-bottom: 1.5rem;
    max-width: 100%;
    width: 100%;
}

#imgContainer img {
    width: 100%;
    height: auto;
    max-height: 30vh;
    object-fit: contain;
    display: block;
    opacity: 0;
    visibility: hidden;
    transition: opacity 1s ease, visibility 1s ease;
}

#imgContainer img.visible {
    opacity: 1;
    visibility: visible;
}

button {
    background: #667eea;
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: background 0.3s ease;
}

button:hover {
    background: #5568d3;
}

button:active {
    transform: scale(0.98);
}

@media (min-width: 768px) {
    .container {
        padding: 3rem 2.5rem;
        max-width: 500px;
    }

    #imgContainer {
        max-width: 500px;
    }

    h1 {
        font-size: 2.5rem;
    }

    p {
        font-size: 1.125rem;
    }
}