/* Google Font applied */
body {
    font-family: 'Roboto', sans-serif;
    margin: 0;
    background-color: #f4f7fb;
    color: #222;
}

/* HEADER */
header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: #1f3a5f;
    color: white;
    padding: 1rem;
}

header span {
    font-weight: bold;
    font-size: 1.2rem;
}

img {
    max-width: 100%;
    height: auto;
}

section img {
    max-width: 250px;
    display: block;
    margin: 0 auto;
}

#menuBtn {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: white;
}

/* NAV */
nav {
    display: none;
    background-color: #2c4a73;
}

nav.open {
    display: block;
}

nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

nav li {
    border-bottom: 1px solid #ddd;
}

nav a {
    display: block;
    padding: 0.8rem;
    text-decoration: none;
    color: white;
}

nav a:hover {
    background-color: #4CAF50;
}

/* MAIN */
main {
    padding: 1rem;
}

h1,
h2 {
    color: #1f3a5f;
}

/* SECTIONS */
section {
    background: white;
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: 10px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

/* COURSE BUTTONS */
button {
    margin: 0.3rem;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 6px;
    background-color: #1f3a5f;
    color: white;
    cursor: pointer;
}

button:hover {
    background-color: #4CAF50;
}

/* COURSE CARDS */
#coursesContainer div {
    padding: 0.7rem;
    margin: 0.4rem 0;
    border-radius: 6px;
    background-color: #e0e6ef;
}

.completed {
    background-color: #4CAF50;
    color: white;
}

/* FOOTER */
footer {
    text-align: center;
    padding: 1rem;
    background-color: #1f3a5f;
    color: white;
}

footer a {
    color: white;
    margin: 0 0.5rem;
}