body {
    background: #221E1E;
    color: #000;
    font-family: 'Roboto Mono', sans-serif;
    font-size: 14px;
    margin: 0;
    padding: 0;
}

.container {
    margin: 0 auto;
    text-align: center;
    width: 400px;
    padding-top: 100px;
}

#register, #login, #forgot_password {
    background: #F8F8F8;
    box-shadow: 0 3px 3px rgba(0, 0, 0, .1);
    margin: 0 auto;
    padding: 20px;
    width: 100%;
    max-width: 400px;
}

#register_header, #login_header, #forgot_password_header {
    color: #b4b4b4;
    font-size: 20px;
    font-weight: 400;
    margin-bottom: 20px;
}

.input-group {
    margin-bottom: 15px;
    position: relative;
    text-align: center;
}

.input-group .tip {
    background: #F0F0F0;
    border: 1px solid #ccc;
    border-radius: 3px;
    color: #000;
    padding: 14px 15px;
    width: 100%;
    box-sizing: border-box;
    text-align: center;
}

.input-group .tip::placeholder {
    color: rgba(255, 255, 255, 0.7);
    text-transform: lowercase;
    text-shadow: 1px 1px 2px #000;
}

.captcha-group {
    text-align: center;
    margin-bottom: 15px;
}

.captcha-group .captcha-image {
    display: block;
    margin: 10px auto 0;
    width: 80px;
    height: auto;
    transform: scale(1.4);
}

button {
    background: #2196F3;
    border: none;
    border-radius: 3px;
    color: #fff;
    cursor: pointer;
    font-size: 16px;
    font-weight: 400;
    padding: 14px 20px;
    width: 100%;
    box-sizing: border-box;
    transition: background 0.3s ease;
}

button:hover {
    background: #1976D2;
}

.error, .success {
    margin-bottom: 20px;
    padding: 10px;
    text-align: left;
}

.error {
    background: #F2DEDE;
    color: #A94442;
    border: 1px solid #EBCBCC;
    border-radius: 3px;
}

.success {
    background: #DFF0D8;
    color: #3C763D;
    border: 1px solid #D6E9C6;
    border-radius: 3px;
}

#login_link, #register_link, #forgot_password_link {
    border-bottom: 0px dashed;
    color: #2196F3;
    display: block;
    margin-top: 20px;
}