#reset-btn {
    background: #ffffff;
    color: #000000;
    border: none;
    padding: 10px 20px;
    font-size: 1rem;
    cursor: pointer;
    margin-bottom: 20px;
    border-radius: 6px;
    transition: background 0.2s ease;
}

#reset-btn:hover {
    background: #e0e0e0;
}

body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background: #000;
    color: #fff;
    text-align: center;
}

.title {
    margin-top: 20px;
    font-size: 2rem;
}

.subtitle {
    margin-bottom: 20px;
    opacity: 0.8;
}

#puzzle-container {
    width: 320px;
    height: 320px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    grid-template-rows: repeat(5, 1fr);

    background-image: url('png.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;

    padding: 10px;
    border-radius: 10px;
}

.tile {
    background: rgba(0, 0, 0, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.15);
    transition: opacity 0.25s ease;
}

.tile.revealed {
    opacity: 0;
}