* {
    box-sizing: border-box;
}

body {
    margin: 0;
    color: #233238;
    background: #f3f6f4;
    font-family: "Roboto", Arial, sans-serif;
    line-height: 1.6;
}

.site-header {
    color: white;
    background: #164b50;
}

.header-inner {
    width: 90%;
    max-width: 1100px;
    margin: 0 auto;
}

#course-title {
    display: block;
    padding: 20px 0;
    color: #f3d48a;
    font-family: "Roboto Slab", Georgia, serif;
    font-size: 1.8rem;
    text-align: center;
}

nav {
    display: flex;
    justify-content: space-around;
    background: #102f34;
}

nav a {
    padding: 12px 18px;
    color: white;
    text-align: center;
    text-decoration: none;
}

nav a:hover {
    color: #102f34;
    background: #f3d48a;
}

main {
    width: 90%;
    max-width: 1100px;
    margin: 30px auto;
}

h1,
h2 {
    font-family: "Roboto Slab", Georgia, serif;
}

h1 {
    margin: 0 0 20px;
    color: #164b50;
    text-align: center;
}

.card-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.card {
    overflow: hidden;
    border: 1px solid #d5dfda;
    border-radius: 8px;
    background: white;
}

.card h2 {
    margin: 0;
    padding: 12px;
    color: white;
    background: #28716c;
    text-align: center;
}

.card-content {
    padding: 18px;
}

.profile-photo,
.location-photo {
    display: block;
    width: 100%;
    height: 240px;
    object-fit: cover;
}

.profile-photo {
    object-position: center 35%;
}

.card-copy {
    color: #40545a;
}

.card-copy a {
    color: #145c58;
}

.card-copy a:hover {
    color: #102f34;
}

.site-footer {
    padding: 18px;
    color: white;
    background: #164b50;
    text-align: center;
}

.site-footer p {
    margin: 5px;
}

#lastModified {
    color: #e0ece8;
}

@media (max-width: 650px) {
    nav {
        flex-wrap: wrap;
    }

    nav a {
        padding: 10px;
    }

    .card-grid {
        grid-template-columns: 1fr;
    }
}