styles.css

@import url('https://fonts.googleapis.com/css2?family=Patrick+Hand&display=swap');

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

:root {
  --font-patrick: 'Patrick Hand', cursive;
}

html {
  font-size: 10px;
}

main {
  font-family: var(--font-patrick);
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main h1,
h2 {
  font-size: 2.4rem;
}

main div.container > div {
  display: inline-flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: center;
  border: 0.3rem solid #000;
  width: 100%;
  min-width: 31rem;
  max-width: 80rem;
}

main div.container > div > div {
  display: flex;
  width: 100%;
  justify-content: space-between;
  padding: 1rem 0.5rem 0 0.5rem;
}

main div.container > div > div:nth-child(odd) {
  background-color: #e8e8e8;
}

main div.container div p {
  font-size: 1.8rem;
}

form button {
  padding: 0.3rem 0.6rem;
}

main div.container div button,
button.add {
  background-color: white;
  padding: 0.3rem 1.5rem;
  border: 0.3rem solid #000;
  box-shadow: 0.3rem 0.3rem 0.3rem #000;
  font-family: var(--font-patrick);
  cursor: pointer;
}

div.bar {
  width: 20vw;
  margin: 0 auto;
  border-bottom: 0.2rem solid #000;
  margin-bottom: 4rem;
  padding-bottom: 2rem;
}

form {
  width: 32rem;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

form > * {
  font-family: var(--font-patrick);
  font-size: 1.6rem;
}

form input {
  width: 100%;
  border: 0.3rem solid #000;
  padding: 0.3rem 0.6rem;
}

header {
  display: flex;
  justify-content: space-between;
  border: 0.25rem solid #000;
  padding: 1rem;
}

header ul {
  display: flex;
  list-style: none;
  gap: 2rem;
}

header ul li + li {
  border-left: 0.3rem solid #000;
  padding: 0 2rem;
}

header a {
  text-decoration: none;
  color: #000;
  font-size: 2rem;
}

.pages {
  display: flex;
  flex-direction: column;
  left: 0;
  transition: left 1s;
  overflow: hidden;
  justify-content: center;
}

.mainWrapper section {
  margin: 0 auto;
  display: inline;
  float: left;
  text-align: center;
}

.mainWrapper > * {
  width: 100vw;
}

footer {
  width: 100vw;
  border: 0.25rem solid #000;
  height: 4rem;
  margin-top: 2rem;
  position: absolute;
  bottom: 1rem;
}

footer h4 {
  font-size: 2rem;
  text-align: left;
  padding-left: 2rem;
}

.hidden {
  display: none !important;
}

.time {
  text-align: end;
  margin-right: 2rem;
  font-size: 1.5rem;
  margin-bottom: 5rem;
}