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

body {
    font-family: Arial, Helvetica, sans-serif;
    min-height: 100vh;
    position: relative;
    top: 20vh;
}

h1 {
    margin-bottom: .5em;
}

h1,
span {
    text-align: center;
}

.feature-card-container {
    width: min(100% - 2rem, 790px);
    margin-inline: auto;
}

.feature-card {
    width: 45%;
    display: inline-block;
    border: 1px solid gray;
    padding: 1rem;
    margin: 1em;
    min-height: 70px;
    border-radius: 8px;
}

.feature-card span {
    display: block;
    margin: 1em 0;
}

.feature-card span:first-of-type  {
    font-weight: bold;
}

input[type="checkbox"] {
    display: block;
    margin-left: auto;
    appearance: none;
    width: 20px;
    height: 20px;
    border: 1px solid gray;
    border-radius: 5px;
}

input[type="checkbox"]:checked {
    border-color: blue;
    outline: 2px solid blueviolet;
    outline-offset: 2px;
    background-color: blue;
}

input[type="checkbox"]:checked::after  {
    content:"✓";
    text-align: center;
    display: block;
    color: white;
}