styles.css

@import url('https://fonts.googleapis.com/css?family=Poppins:200i,400&display=swap');

:root {
  --color-white: #f3f3f3;
  --color-darkblue: #1b1b32;
  --color-darkblue-alpha: rgba(27, 27, 50, 0.8);
  --color-green: #37af65;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}
body {
  font-family: 'Poppins', sans-serif;
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.4;
  color: var(--color-white);
  margin: 0;
}
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    z-index: -1;
    background: var(--color-darkblue);
    background-image: linear-gradient(
        115deg,
        rgba(58, 58, 158, 0.8),
        rgba(136, 136, 206, 0.7)
      ),
      url(https://media.admagazine.com/photos/618a6acacc7069ed5077ca7c/2:3/w_1000,h_1500,c_limit/69052.jpg);
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
}
.container {
    width: 100%;
    margin: 3.125rem auto 0 auto;
  }
  
  @media (min-width: 576px) {
    .container {
      max-width: 540px;
    }
  }
  
  @media (min-width: 768px) {
    .container {
      max-width: 720px;
    }
  }
  
    /* ScrollBar MOD */
::-webkit-scrollbar {
    width: 15px;
}
::-webkit-scrollbar-track{
    box-shadow: inset 0 0 5px #444;
}
::-webkit-scrollbar-thumb {
    background: #444;
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgb(59, 59, 59);
}

#title {
    text-align: center;
    margin: 0;
}
#description {
    text-align: center;
    font-style: italic;
    text-shadow: 1px 1px 1px rgba(0, 0, 0, 0.4);
}

input,
button,
select,
textarea {
    margin: 0;
    font-family: inherit;
    font-size: inherit;
    line-height: inherit;
}
/* FORM */
form {
    background: var(--color-darkblue-alpha);
    padding: 2.5rem 0.625rem;
    border-radius: 0.25rem;
  }
  
@media (min-width: 480px) {
    form {
        padding: 2.5rem;
    }
}
.form-group {
    margin: 0 auto 1.25rem auto;
    padding: 0.25rem;
  }
  
label {
    display: flex;
    align-items: center;
    margin-bottom: 0.5rem;
}
.form-control {
    display: block;
    width: 100%;
    height: 2.375rem;
    padding: 0.375rem 0.75rem;
    color: #495057;
    background-color: #fff;
    background-clip: padding-box;
    border: 1px solid #ced4da;
    border-radius: 0.25rem;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
} 
.form-control:focus {
    border-color: #80bdff;
    outline: 0;
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}
.input-radio,
.input-checkbox {
  display: inline-block;
  margin-right: 0.625rem;
  min-height: 1.25rem;
  min-width: 1.25rem;
}
.span {
    margin-left: 0.25rem;
    font-size: 0.9rem;
    color: #e4e4e4;
}
.text-area {
    min-height: 120px;
    width: 100%;
    padding: 0.625rem;
    resize: vertical;
}
.submit-button {
    display: block;
    width: 100%;
    padding: 0.75rem;
    background: var(--color-green);
    color: inherit;
    border-radius: 2px;
    cursor: pointer;
}