style.css

html {
  box-sizing: border-box;
  font-size: 100%;
}

*, *::before, *::after {
  box-sizing: inherit;
}

body {
  font-family: 'Karla', sans-serif;
  line-height: 1.3;
  background-color: var(--ltgray);
  color: var(--grayblue);
  padding: var(--paddingX);
}

:root {
  --white: hsl(0, 0%, 100%);
  --cyan: hsl(179, 62%, 40%);
  --ltcyan: hsl(179, 62%, 45%);
  --yellow: hsl(71, 73%, 54%);
  --dkyellow: hsl(71, 73%, 48%);
  --ltgray: hsl(204, 43%, 93%);
  --grayblue: hsl(218, 22%, 67%);
  --paddingX: 1.8rem;
  --paddingY: 1.5rem;
}

a {
  text-decoration: none;
}

h1, h2, h3 {  
  font-weight: bold;
  margin-top: 0;
  line-height: 1.15;
}

h2 {
  font-size: 1.25rem;
  margin-bottom: 1.25rem;
}

h3 {
  font-size: 1.1rem;
}

p {
  margin-top: 0;
}

.price {
  border-radius: 0.5rem;
  overflow: hidden;
  max-width: 40rem;
  margin: auto;
}

@media only screen and (min-width: 62.5em){

  .price {    
    display: grid;    
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(2, auto);
  }  

  .community {
    grid-column: 1 / 3;
  }
}

.price > * {
  padding: var(--paddingX) var(--paddingY);
}

.community {
  background-color: var(--white);  
}

.community h2 {
  color: var(--cyan);
}

.community .subtitle {    
  font-size: 1rem;
  color: var(--yellow);
  font-weight: bold;  
  margin-bottom: 1rem;
}

.community p {
  font-size: 0.85rem;  
  line-height: 1.75;
  margin-bottom: 0;
}

.subscription, .why {
  color: var(--ltgray);
}

.subscription {
  background-color: var(--cyan);  
}

.subscription__price {  
  display: flex;
  align-items: center;
  font-size: 2rem;
  font-weight: bold;
  margin-bottom: 0.25rem;
}

.subscription__price span {
  font-size: 1rem;
  margin-left: 0.8rem;
  font-weight: normal;
  opacity: 0.75;
}

.subscription p {
  font-size: 0.9rem;
  margin-bottom: 1.75rem;
}

.subscription a {
  display: block;
  background-color: var(--yellow);
  color: var(--white);
  padding: 0.75rem;
  text-align: center;
  border-radius: 0.25rem;
  box-shadow: 0 0.5rem 1rem rgba(0,0,0,0.15); 
  transition: background-color 200ms ease;
}

.subscription a:hover {
  background-color: var(--dkyellow);  
}

.why {
  background-color: var(--ltcyan);
}

.why ul {
  margin-top: 0;
  padding: 0;
}

.why ul li {
  list-style-type: none;
  font-size: 0.85rem;
  margin-bottom: 0.2rem;
}