style.css

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

main {
    width: 100%;
    height: 100%;
    min-height: 100vh;

    display: flex;
    justify-content: center;
    align-items: center;

    flex-direction: column;
    background-image: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.container {
    width: 40%;
    padding: 20px;
    border-radius: 10px;
    background: #c1c1c14a;
}

.form-container {
    margin: 30px 0;
    display: flex;
    align-items: center;
}

.inp {
    outline: none;
    border: 2px solid #808080;
    border-radius: 10px;

    margin: 0 10px;
    padding: 5px;
    width: 70px;
}

.btn {
    outline: none;
    border: none;
    padding: 5px 10px;

    border-radius: 10px;
    cursor: pointer;
    transition: .4s;
}

.text-result {
    margin: 10px 0;
}