body {
    font-family: 'Roboto', sans-serif;
    margin: 0;
    padding: 0;
    color: #333;
    line-height: 1.6;
}

header {
    background: #0066cc;
    color: white;
    padding: 1em 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

header .logo img {
    width: 150px;
}

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

nav ul li {
    margin: 0 1em;
}

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

nav ul li a:hover {
    text-decoration: underline;
}

.section {
    padding: 4em 0;
}

.section h1, .section h2, .section h3 {
    color: #0066cc;
    margin-bottom: 0.5em;
}

.section p, .section ul {
    margin-bottom: 1.5em;
}

.section ul {
    list-style: none;
    padding: 0;
}

.section ul li {
    margin-bottom: 1em;
    padding-left: 1.2em;
    position: relative;
}

.section ul li::before {
    content: '\2022';
    color: #0066cc;
    font-weight: bold;
    display: inline-block;
    width: 1em;
    margin-left: -1em;
}

.section img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin-top: 1em;
}

.section.bg-primary {
    background-color: #e6f2ff;
}

.section.bg-secondary {
    background-color: #f2f2f2;
}

.section.bg-light {
    background-color: #fff;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

.course {
    margin-bottom: 2em;
}

footer {
    background: #0066cc;
    color: white;
    text-align: center;
    padding: 1em 0;
}

footer .container {
    display: flex;
    justify-content: center;
    align-items: center;
}

footer p {
    margin: 0;
}