* {
    margin: 0px;
    padding: 0px;
    box-sizing: border-box;
}

body {
    font-family: sans-serif;
    background: #469AC2;
}

.login-form {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90%;
    max-width: 450px;
    background: #fff;
    padding: 20px 30px;
    box-shadow: rgba(17, 12, 46, 0.15) 0px 48px 100px 0px;
    border: 1px solid rgba(17, 12, 46, 0.15);
    border-radius: 10px;
}

.login-form .form-title {
    text-align: center;
    font-size: 30px;
    font-weight: 600;
    margin: 10px 0px 0px;
    color: #111;
}

.login-form .form-input {
    margin: 10px 0px;
}

.login-form .form-input label,
.login-form .captcha label {
    display: block;
    font-size: 15px;
    color: #111;
    margin-bottom: 10px;
}

.login-form .form-input input {
    width: 100%;
    padding: 10px;
    outline: none;
    border-radius: 4px;
    border: 1px solid #888;
    font-size: 15px;
}

.login-form .captcha {
    margin: 15px 0px;
}

.login-form .captcha .preview {
    color: #555;
    width: 100%;
    text-align: center;
    height: 40px;
    line-height: 40px;
    letter-spacing: 8px;
    border: 1px dashed #888;
    border-radius: 4px;
    font-family: "monospace";
    margin: 15px 0px;
}

.login-form .captcha .preview span {
    display: inline-block;
    user-select: none;
}

.login-form .captcha .captcha-form {
    display: flex;
}

.login-form .captcha .captcha-form input {
    width: 100%;
    outline: none;
    padding: 8px;
    border-radius: 4px;
    border: 1px solid #888;
}

.login-form .captcha .captcha-form .captcha-refresh {
    width: 40px;
    border: none;
    outline: none;
    background: #888;
    border-radius: 4px;
    color: #eee;
    cursor: pointer;
}

#login-btn {
    margin-top: 5px;
    width: 100%;
    padding: 12px;
    border: none;
    outline: none;
    font-size: 15px;
    text-transform: uppercase;
    background: #4c81ff;
    border-radius: 5px;
    color: #fff;
    transition: .3s;
    cursor: pointer;
}

#login-btn:hover {
    opacity: .8;
}