@import url('https://fonts.googleapis.com/css?family=Open+Sans&display=swap');
     :root {
        --success-color: rgb(0, 255, 0);
        --error-color: rgb(255, 0, 0);
    }
    
    * {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }
    
    body {
        background-color: #636a72;
        font-family: 'Open Sans', sans-serif;
        display: flex;
        align-items: center;
        justify-content: center;
        min-height: 100vh;
        margin: 0;
    }
    
    .container {
        background-color: #fff;
        border-radius: 5px;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
        width: 400px;
        border-radius: 10px;
    }
    
    h2 {
        text-align: center;
        margin: 20px 0 10px;
        color: rgb(3, 136, 43);
        font-weight: bolder;
    }
    
    #head {
        text-align: center;
    }
    
    .form {
        padding: 30px 40px;
    }
    
    .form-control {
        margin-bottom: 10px;
        padding-bottom: 20px;
        position: relative;
    }
    
    .form-control label {
        color: #777;
        display: block;
        margin-bottom: 5px;
    }
    
    .form-control input {
        border: 2px solid #f0f0f0;
        border-radius: 4px;
        display: block;
        width: 100%;
        padding: 10px;
        font-size: 14px;
    }
    
    .form-control input:focus {
        outline: 0;
        border-color: #777;
    }
    
    .form-control.success input {
        border-color: var(--success-color);
    }
    
    .form-control.error input {
        border-color: var(--error-color);
    }
    
    .form-control small {
        color: var(--error-color);
        position: absolute;
        bottom: 0;
        left: 0;
        visibility: hidden;
    }
    
    .form-control.error small {
        visibility: visible;
    }
    
    .form button {
        cursor: pointer;
        background-color: #2407a5;
        border: 2px solid;
        border-radius: 4px;
        color: white;
        display: block;
        font-size: 16px;
        padding: 10px;
        margin-top: 20px;
        width: 100%;
    }
    
    .form button:hover {
        background: linear-gradient(to left, rgb(101, 101, 236), rgb(25, 145, 224), rgb(86, 210, 241));
    }
    
    .form-control.success .fa-check-circle {
        visibility: visible;
        color: rgb(78, 241, 100);
    }
    
    .form-control.error input {
        border-color: red;
    }
    
    .form-control.error .fa-exclamation-circle {
        visibility: visible;
        color: red;
    }
    
    .form-control i {
        position: absolute;
        right: 10px;
        top: 36px;
        visibility: hidden;
    }