.hidden {
  visibility: hidden;
}

body {
  box-sizing: border-box;
  color: white;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  margin: 0;
  flex-wrap: nowrap;
}

.container {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 50px;
  margin-bottom: 10px;
}

img {
  position: fixed;
  height: 100vh;
  width: 100vw;
  left: 0;
  top: 0;
  z-index: -1;
}

.login-form {
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-box {
  margin-right: 10px;
  width: 200px;
  height: 30px;
  border-radius: 15px;
  border-width: 0px;
  text-align: center;
}

#clock {
  display: flex;
  justify-content: center;
  color: aquamarine;
}

.submit-box {
  border-radius: 10px;
  border-width: 0;
  width: 80px;
  height: 30px;
  color: #638d87;
  text-decoration: solid;
  font-size: 15px;
  background-color: #ffeecb;
}

.submit-box:hover {
  background-color: rgb(209, 217, 49);
  color: green;
  transition: ease-in-out 1s;
}

#todo-form {
  display: flex;
  justify-content: center;
  margin-top: 20px;
}

.ask-todo {
  width: 200px;
  height: 30px;
  text-align: center;
  background-color: bisque;
  border-radius: 20px;
  border-width: 0px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.first-container {
  width: 400px;
  height: 600px;
  border: 3px solid white;
}

.clock-title {
  display: flex;
  justify-content: center;
  align-items: center;
  color: wheat;
}

.second-container {
  width: 500px;
  height: 600px;
  border: 3px solid white;
}

.third-container {
  width: 400px;
  height: 600px;
  border: 3px solid white;
  display: flex;
  justify-content: flex-end;
  align-items: flex-start;
}

.internet-box {
  display: flex;
  flex-direction: column;
  width: 80px;
  height: 300px;
  margin-right: 10px;
  margin-top: 10px;
}

.internet-box-img {
  width: 60px;
  height: 70px;
  margin-bottom: 20px;
}

figure {
  display: flex;
  width: 200px;
  height: 100px;
}

#greeting {
  display: flex;
  justify-content: center;
  align-items: center;
}

li::marker {
  content: "🔥";
  position: absolute;
}

#todo-list {
  align-items: center;
  justify-content: center;
}

#todo-list li {
  position: relative;
}

#todo-list span {
  display: inline-block;
  margin-left: 10px;
}

#todo-list button {
  background-color: transparent;
  border-style: none;
  cursor: pointer;
  position: absolute;
  right: 0;
}

.a {
  display: flex;
  width: 75px;
  height: 70px;
  z-index: 0;
  position: relative;
}

.a:hover {
  animation: Flip 2s ease-in-out;
}

@keyframes Flip {
  from {
    transform: rotateY(0);
  }
  to {
    transform: rotateY(360deg);
  }
}