* {
    margin: 0;
    padding: 0;
}

body {
    font-family: "Open Sans", Arial, sans-serif;
    line-height: 1.5;
    color: #333;
    background-color: #f9f9f9;
}

.container {
    max-width: 600px;
    margin: 2rem auto;
    padding: 0 1rem;
}

header, footer {
    max-width: 600px;
    padding: 0 1rem;
}

header {
    margin: 2rem auto 4rem auto;
}

footer {
    margin: 4rem auto 2rem auto;
}

.header__logo_lightmode {
    display: block;
}

.header__logo_darkmode {
    display: none;
}

.content {
    margin-bottom: 2rem;
}

h1 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
}

h2 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

p {
    font-size: 1rem;
    color: #555;
    padding-bottom: 1rem;
}

hr {
    border: 0;
    border-bottom: 1px solid #ccc;
    margin: 24px 0;
}

.button {
    display: block;
    padding: 0.75rem 1.5rem;
    background-color: #4773A4;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s ease;
    text-align: center;
    text-decoration: none;
    margin: 1rem auto 3rem auto;
}

.button + .button {
    margin-top: -2rem;
}

.form {
    display: flex;
    flex-direction: column;
    padding-bottom: 4rem;
}

.form label {
    font-size: 0.875rem;
    font-weight: 600;
    margin-top: 0.5rem;
}

.form input {
    padding: 0.75rem;
    border-radius: 4px;
    font-size: 1rem;
}

.form input:focus {
    outline: none;
    border-color: #4773A4;
}

form .button {
    width: 100%;
}

.button:hover {
    background-color: #0056b3;
}

img {
    border: 0;
    width: 100%;
    height: auto;
}

/* Responsive */
@media (min-width: 768px) {
    .container {
        padding: 0 2rem;
        max-width: 800px;
    }

    header, footer {
        max-width: 800px;
        padding: 0 2rem;
    }

    .header__logo_lightmode {
        display: none;
        width: 50%;
    }

    .header__logo_darkmode {
        display: block;
        width: 50%;
    }
}

@media (prefers-color-scheme: dark) {
    html, body {
        background: #181a1b;
        color: #dcdcdc;
    }

    h1, h2, h3, h4, .bold, p {
        color: #dcdcdc;
    }
    a {
        color: #fafafa;
    }


    hr {
        border-bottom-color: #3d3d3d;
    }

    .header__logo_lightmode {
        display: none;
    }

    .header__logo_darkmode {
        display: block;
    }

}