:root {
  --bg: hsl(0, 0%, 100%);
  --txt: hsl(0, 0%, 15%);
  --brand-col1: #5a5560;
  --brand-col2: rgb(72, 95, 154);
  --brand-col3: #9d8d8f;
  --shadow: 4px 4px 20px 4px rgba(0,0,0,0.4);
  --font1: system-ui, sans-serif;
}

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

html {
  font-size: 62.5%;
  line-height: 1.15;
  -webkit-text-size-adjust: 100%;
}

body {
  position: relative;
  color: #ffffff;
  background: var(--brand-col2);
  font-family: var(--font1);
  font-size: 1.8rem;
  line-height: 1.6;
  -webkit-tap-highlight-color: transparent;
}


#products, #cart, #payment-form {
  width: 700px;
  margin: 150px auto;

}

.add-to-cart, #checkout-button, #submit-payment {
  background: #000;
  color: #fff;
  border: none;
  border-radius: 8px;
  margin: 50px 0;
  padding: 0;
  width: 35rem;
  height: 6rem;
  font-size: 3.4rem;
  font-weight: bold;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
}