html, body {height: 100%;width: 100%;}

body {
    background: linear-gradient(45deg, #003e74, #0290d7);
    background-repeat: no-repeat;
    background-size: cover;
    padding: 0;
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.header {
    text-align: center;
    padding: 15px;
    margin-bottom: 30px;
}

h3 {
    color: #fff;
    font-weight: 600;
}

form {
    margin: 20px;
    padding: 20px;
    background: #fff;
    border: 0;
    border-radius: 5px;
}

.field {
    width: 100%;
    padding: 3px;
    margin-bottom: 15px;
    background: #fff;
    border: 1px solid #a0b1b9;
    border-radius: 4px;
}

label {
    color: #607d8b;
    font-size: 14px;
    margin: 0;
    padding: 0;
}

.button {
    width: 100%;
    border: 0;
    border-radius: 5px;
    color: #fff;
    background: #f58711;
    padding: 10px;
    font-weight: 600;
}

.error {
    border-color: #f00 !important;
}