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

:root {
    --main-bg-color: rgb(235, 235, 235);
    --header-bg-color: rgb(65, 65, 65);
    --border-color: rgb(55, 100, 255);
    --link-bg-color: rgb(200, 200, 200);
}

html, body{
    height: 100%;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    background-color: var(--main-bg-color);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    background-color: var(--header-bg-color);
    color: white;
    padding: 1rem;
    text-align: center;
}

header h2 {
    margin-bottom: 0.5rem;
}

nav ul {
    list-style: none;
}

nav li {
    margin: 0.5rem 0;
}

nav a {
    color: white;
    text-decoration: none;
    font-weight: bold;
}

main {
    flex: 1;
    padding: 1rem;
}

.container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.container img {
    width: 100%;
    border-radius: 10px;
}

.container h2 {
    margin-bottom: 0.5rem;
}

.container p {
    margin-bottom: 1rem;
}

.container a {
    display: inline-block;
    background-color: var(--link-bg-color);
    padding: 0.5rem 1rem;
    margin-right: 0.5rem;
    text-decoration: none;
    color: black;
    border-radius: 5px;
    border: 2px solid transparent;
    transition: 0.3s;
}

.container a:hover {
    border-color: var(--border-color);
}

footer {
    text-align: center;
    padding: 1rem;
    background-color: var(--header-bg-color);
    color: white;
    margin-top: 2rem;
}

@media (min-width: 768px) {

    nav ul {
        display: flex;
        justify-content: center;
        gap: 1rem;
    }

    nav li {
        margin: 0;
    }

    .container {
        flex-direction: row;
        align-items: center;
    }

    .container img {
        width: 50%;
    }

    .container div {
        width: 50%;
    }
}

@media (min-width: 1024px) {

    main {
        max-width: 1000px;
        margin: auto;
    }

    header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 1rem 2rem;
    }

    header h2 {
        margin: 0;
    }

    nav ul {
        justify-content: flex-end;
    }
}