main.css

:root {
  --color-white: #f4f4f4;
  --color-gray-light: #d1d1d1;
  --color-black: #222;
  --color-primary: #3184d1;
  --color-primary-light: #a9d0f5;
  --color-danger: #e90000;
  --color-danger-light: #f5b5b5;
  --min-width: 360px;
  --max-width: 1200px;
  --base-font-family: Arial, Helvetica, sans-serif;
  --fancy-font-family: "Pacifico", serif;
  --base-padding: 10px;
  font-size: 12px;
}

@media screen and (min-width: 600px) {
  :root {
    --base-padding: 12px;
    font-size: 14px;
  }
}

@media screen and (min-width: 1000px) {
  :root {
    --base-padding: 20px;
    font-size: 16px;
  }
}

body {
  margin: 0;
  min-width: var(--min-width);
  color: var(--color-black);
  font-family: var(--base-font-family);
}

/* ----------------- Layout ----------------- */

.main-container {
  max-width: var(--max-width);
  display: grid;
  grid-gap: var(--base-padding);
  grid-template-columns: 1fr 3fr;
  margin: 0 auto;
  padding: 0 var(--base-padding);
}

@media screen and (min-width: 600px) {
  .main-container {
    grid-template-columns: 5fr 6fr;
  }
}

@media screen and (min-width: 1000px) {
  .main-container {
    grid-template-columns: 5fr 3fr;
  }
}

.section {
  display: flex;
  flex-direction: column;
  max-height: 100vh;
}

/* ----------------- Typography ----------------- */

h1,
h2,
h3 {
  font-family: var(--fancy-font-family);
  font-weight: 400;
  margin: 1rem auto;
}

p {
  margin: 1rem auto;
}

.text-center {
  text-align: center;
}

/* ----------------- Buttons ----------------- */

button {
  font-family: var(--base-font-family);
  cursor: pointer;
  font-size: 0.95rem;
  border: none;
}

:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn {
  padding: 0.65rem 1rem;
  transition: 0.3s all;
}

.btn--small {
  padding: 0.2rem 0.4rem;
}

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

.btn--primary:hover:not(:disabled),
.btn--primary:focus {
  outline: none;
  box-shadow: 0 0 0 5px var(--color-primary-light);
}

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

.btn--danger:hover:not(:disabled),
.btn--danger:focus {
  outline: none;
  box-shadow: 0 0 0 5px var(--color-danger-light);
}

/* ----------------- Products ----------------- */

.products {
  display: grid;
  grid-gap: var(--base-padding);
  overflow: auto;
}

@media screen and (min-width: 600px) {
  .products {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media screen and (min-width: 1000px) {
  .products {
    grid-template-columns: repeat(3, 1fr);
  }
}

.product {
  text-align: center;
  padding: var(--base-padding);
  border: 2px solid var(--color-gray-light);
}

.product:hover {
  border-style: solid;
}

.product__price:before {
  content: "$";
}

.product__image {
  max-width: 65px;
  transition: 0.3s all;
  filter: drop-shadow(0px 0px 0px transparent);
}

@media screen and (min-width: 600px) {
  .product__image {
    max-width: 100px;
  }
}

.product:hover .product__image {
  animation: 0.5s shake-product-image;
}

@keyframes shake-product-image {
  25% {
    transform: rotate(-10deg);
  }
  50% {
    transform: rotate(10deg);
  }
  75% {
    transform: rotate(-10deg);
  }
  100% {
    transform: rotate(0deg);
  }
}

/* ----------------- Cart ----------------- */

.cart {
  display: grid;
  grid-gap: var(--base-padding);
  overflow-x: hidden;
  overflow-y: auto;
}

.cart h3 {
  margin: 0;
}

.cart__item {
  display: grid;
  grid-template-columns: 2rem 7rem 3rem auto 1rem auto auto;
  justify-content: space-between;
  align-items: center;
  text-align: center;
  padding: var(--base-padding);
  border: 2px solid var(--color-gray-light);
  animation: 0.3s add-cart-item;
}

@keyframes add-cart-item {
  from {
    margin-left: -200px;
    margin-right: 200px;
    opacity: 0;
  }
  to {
    margin-left: 0;
    margin-right: 0;
    opacity: 1;
  }
}

.cart__item--removed {
  animation: 0.3s remove-cart-item;
}

@keyframes remove-cart-item {
  to {
    margin-left: 200px;
    margin-right: -200px;
    opacity: 0;
  }
}

.cart__item__image {
  max-width: 28px;
}

@media screen and (min-width: 600px) {
  .cart__item__image {
    max-width: 38.5px;
  }
}

.cart__item__price:before {
  content: "$";
}

.cart-footer {
  display: flex;
  justify-content: space-between;
  margin-top: var(--base-padding);
}

.overlay {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background: rgba(255, 255, 255, 0.7);
  cursor: wait;
}