style.css

body{
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(to linear-gradient);
    font-family: Arial;
    color: rgb(100, 14, 180);
}
.containor{
    background: rgba(255, 255, 255, 0.3);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.3);
    width: 85%;
    max-width: 450px;
    min-width: 350px;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.heading{
    font-size: 30px;
}
.temp-containor{
    width: 100%;
    padding: 15px;
    font-weight: bold;
    font-size: 18px;
}
input{
    width: 250px;
    font-family: Arial, Helvetica, sans-serif;
    float: right;
    padding: 5px;
    outline: none;
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(0, 0, 0, 0.6);
    color: darkgreen;
    font-size: 18px;
}
input::placeholder{
    color: darkgrey;
}