@font-face {
    font-family: JetBrains;
    src: url(JetBrainsMono-Bold.ttf);
}
body {
    font-family: JetBrains;
    max-width: 100%;
    min-height: 90vh;
    overflow-x: hidden;
    background: #999;

}
 
.contenedor {
    margin: 0 auto;
    min-width: 420px;
    max-width: 75%;
}
label {
    font-size: 1.2rem;
}
input {
    padding: 10px;
    font-size: 1.2rem;
}
input[type="button"], input[type="submit"] {
    font-weight: bold;
}
input[type="checkbox"] {
    width: 30px;
    height: 30px;
}

.row1 {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    margin: 10px;
}
.justSB {
    justify-content: space-between;
}