body{
    font-family: Arial, Helvetica, sans-serif;
    background: linear-gradient(to right, #8aa3b6, #ffffff);
}

.container {
    padding: 40px 30px;
    max-width: 600px;
}

h1 {
    text-align: center;
    color: #1565c0;
    font-weight: 600;
    font-size: 36;
}

p {
    text-align: center;
    font-size: 18;
    color: #555;

}

form {
    display: flex;
}

.form-container {
    padding: 15px 20px;
}

label {
    font-weight: 600;
    margin-bottom: 5px;
    color: #1565c0;
    }

.instruction {
    padding: 10px;
    color: #365193;
    border: 1px solid rgb(221, 221, 221);
    border-color: #1976d2;
    width: 80%;
    font-size: 16px;
    border-radius: 10px;
    line-height: 20px;
}

.submit {
    background: #1565c0;
    color: white;
    border: none;
    padding: 12px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 16px;
    transition: all 1.s ease-in-out;
}
.submit:hover {
    background-color: #0d47a1;
    transform: scale(1);
}

.letter {
    margin-top: 30px;
    background-color: #e3f2fd;
    padding: 20px;
    border-radius: 20px;
    line-height: 1.5;
    font-size: 16px;
    white-space: pre-wrap;
}
.hidden {
    display: none;
}

footer{
    text-align: center;
    font-size: 13px;
    margin-top: 30px;
    color: #666;
}

@keyframes blink {
  50% {
    opacity: 0.0;
  }
}
.blink {
  animation: blink 1s step-start 0s infinite;
}