/* common use => */

* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  text-decoration: none;
  color: #fff;
  border-radius: 0.3rem;
}

body {
  background-color: #444;
}

h1 {
  font-size: 2.5rem;
  letter-spacing: 0.2rem;
}

ul {
  list-style: none;
}

select {
  font-size: 1.2rem;
  width: 20rem;
  padding-left: 1.5rem;
  text-align: left;
  background-color: #000;
}
/* <= common use */

/* section => */
section {
  width: 100vw;
  height: 100vh;
  display: none;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}

section.active {
  display: flex;
}
/* <= section */

/* nav bar => */
#nav {
  width: 100vw;
  height: 5vh;
  min-height: 2rem;
  background-color: #222;
  position: fixed;
  z-index: 100;
  display: flex;
  justify-content: space-around;
  align-items: center;
}

.nav-menu {
  cursor: pointer;
  padding: 0 1rem;
  border-radius: 1rem;
  transition: 0.3s;
  user-select: none;
}

.nav-menu:hover {
  color: #222;
  background-color: #fff;
}

.nav-menu:active {
  transform: scale(0.9);
}

.nav-menu.active {
  color: #222;
  background-color: #fff;
}

/* <= nav bar */

/* to_do => */
#todo > h1 {
  margin-bottom: 1.5rem;
}

.todo-container,
.done-container {
  width: 90vw;
  max-width: 600px;
  text-align: center;
  background-color: lightseagreen;
  margin-top: 1.5rem;
  padding: 0.5em 0;
}

.todo-container > ul > li {
  background-color: seagreen;
}

.done-container > ul > li {
  background-color: darkseagreen;
}

.td-search-form,
.td-add-form {
  border: 3px solid #fff;
  margin: 0.5rem 0;
}

.td-label {
  display: inline-block;
  text-align: center;
  min-width: 5rem;
}

.td-search-input,
.td-add-input {
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
  width: 60vw;
  max-width: 400px;
  padding: 0.4rem;
  color: black;
  outline: solid #fff;
}

.td-item {
  width: 80vw;
  max-width: 500px;
  margin: 0.3rem auto;
  padding: 0.2rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.td-content {
  width: 80%;
  max-width: 400px;
  text-align: left;
  word-break: break-all;
}

.td-btn-container {
  display: flex;
  justify-content: space-between;
}

.td-btn {
  height: 1.5rem;
  margin: 0 0.3rem;
  cursor: pointer;
  background-color: #fff;
  border-radius: 1rem;
}

.td-item.hide {
  display: none;
}

/* <= to_do */