.gray-block {
  background: #f0f0f0;
  padding: 3px 0;
  width: 80%;
  margin: 0 auto;
}

.gray-block-content {
    margin: 0 auto;
    color: #333;
    font-size: 1.2rem;
    padding: 8px 10px;
}

.gray-block-content P {
    margin: 0;
}

.gray-block-content h1, .gray-block-content h2, .gray-block-content h3, .gray-block-content h4, .gray-block-content h5, .gray-block-content h6 {
    margin: 0 0 0.5em 0;
}

@media (max-width: 768px) {
    .gray-block {
        width: 100%;
        padding: 8px 10px;
        margin:0;
    }
    .gray-block-content {
        font-size: 1rem;
    }
}