#textBox {
  border-radius: 5px;
  width: 300px;
  height: 200px;
  padding: 10px;
  border: solid black 2px;
  font-size: 16px;
}
.container {
  padding: 10px;
  width: fit-content;
  background-color: lightgreen;
  border-radius: 20px;
  box-shadow: 10px 10px 10px black;
}
.charWar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  text-align: center;
}
#warning {
  visibility: hidden;
  font: optional;
}
#charCount {
  color: white;
  font-weight: bold;
}
#btnSend {
  width: 100%;
  color: white;
  background-color: green;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-weight: bolder;
  height: 30px;
}
.btns {
  display: flex;
  justify-content: center;
  gap: 30px;
  padding-top: 30px;
}
.btnStu {
  background-color: red;
  padding: 10px;
  text-decoration: none;
  border: solid rgb(12, 12, 12) 1px;
  border-radius: 5px;
  color: white;
  font-weight: bold;
}
.btnReg {
  background-color: blue;
  padding: 10px;
  text-decoration: none;
  border: solid rgb(7, 7, 7) 1px;
  border-radius: 5px;
  color: white;
  font-weight: bold;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}
#warning.blink {
  animation: blink 2s linear infinite;
}