body {
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    color: #333;
    line-height: 1.6;
    background-color: #f4faff;
}

header {
    background: #1E90FF;
    color: #fff;
    padding: 15px 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

nav .logo {
    font-size: 28px;
    font-weight: bold;
}

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

nav ul li {
    margin-left: 20px;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
    font-weight: 500;
    padding: 5px 10px;
    border-radius: 3px;
    transition: background 0.3s, color 0.3s;
}

nav ul li a:hover {
    background: rgba(255, 255, 255, 0.2);
    color: #1E90FF;
}

#hero {
    background: url('https://cdn.b12.io/client_media/SUq5Z6sp/064edf6e-41b7-11ef-b586-0242ac110002-jpg-hero_image.jpeg') no-repeat center center/cover;
    color: #ffffff;
    text-align: center;
    padding: 120px 20px;
    transition: background 0.3s;
}

.hero-content h1 {
    font-size: 48px;
    margin: 0 0 20px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
    transition: transform 0.3s;
}

.hero-content p {
    font-size: 24px;
    margin: 0 0 30px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
    transition: transform 0.3s;
}

.hero-content h1:hover, .hero-content p:hover {
    transform: translateY(-5px);
}

.btn {
    background: #1E90FF;
    color: #fff;
    padding: 12px 25px;
    text-decoration: none;
    border-radius: 5px;
    transition: background 0.3s, transform 0.3s;
    font-weight: bold;
}

.btn:hover {
    background: #1C86EE;
    transform: translateY(-2px);
}

section {
    padding: 60px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

h2 {
    text-align: center;
    margin-bottom: 50px;
    font-size: 32px;
    color: #333;
    position: relative;
}

h2::after {
    content: '';
    width: 60px;
    height: 3px;
    background: #1E90FF;
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
}

.course, .testimonial {
    margin-bottom: 40px;
    padding: 20px;
    background: #fff;
    border-radius: 5px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.course:hover, .testimonial:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.course h3, .testimonial cite {
    margin: 15px 0;
    font-size: 24px;
    color: #1E90FF;
}

.testimonial p {
    font-style: italic;
}

#call-to-action {
    text-align: center;
    padding: 80px 20px;
    background: #1E90FF;
    color: #fff;
    transition: background 0.3s;
}

#call-to-action:hover {
    background: #1C86EE;
}

footer {
    background: #333;
    color: #fff;
    text-align: center;
    padding: 20px 0;
    margin-top: 40px;
}

footer p {
    margin: 0;
    font-size: 14px;
}