:root {
    --primary-color: #00AEFF;
    --secondary-color: #8D8CA4;
    --background-color: #f8f9fa;
    --text-color: #212529;
}
html, body {
    width: 100%;
    min-height: 100%;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: var(--background-color);
}

.box-login {
    width: 550px;
    max-width: 95%;
    padding: 40px;
    background-color: #ffffff;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
}

.bi {
    display: inline-block;
    width: 1rem;
    height: 1rem;
    vertical-align: -.125em;
    fill: currentColor;
}