* {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
}
body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  font-size: 16px;
}
:root {
  --main-color: brown;
  --header-color: red;
  --text-color: maroon;
}
/* header */
header {
  display: flex;
  justify-content: center;
}
nav > ul {
  width: 100%;
  display: flex;
  gap: 1em;
  justify-content: space-around;
  align-items: center;
  list-style-type: none;
  background-color: var(--main-color);
  padding: 1rem;
}
a {
  color: var(--text-color);
  font-weight: 700;
  font-size: 2rem;
  text-decoration: none;
  text-transform: uppercase;
}

/* section

/* todo cards */
.todo-card {
  margin: 1rem;
  background-color: var(--main-color);
  display: inline-block;
  padding: 0.5rem;
  border-radius: 10px;
  width: 33.3vw;
}
.todo-card > h2 {
  text-align: center;
  font-size: 2rem;
  text-decoration: underline;
  text-underline-offset: 1rem;
}
.todo-card > ul {
  list-style-type: none;
}
.todo-card ul > li {
  color: azure;
}