body {
    margin: 0;
    font-family: 'Segoe UI', Arial, sans-serif;
    color: #222;
    line-height: 1.6;
}

header {
    position: relative;
    height: 85vh;
    background: url('images/hero.jpg') center/cover no-repeat;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

header::after {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(11, 44, 74, 0.75);
}

header .content {
    position: relative;
    z-index: 2;
    max-width: 900px;
}

header h1 {
    font-size: 42px;
}

nav {
    position: fixed;
    width: 100%;
    top: 0;
    background: white;
    display: flex;
    justify-content: center;
    padding: 15px 0;
    transition: 0.3s;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    z-index: 1000;
}

nav.scrolled {
    padding: 8px 0;
}

nav a {
    margin: 0 20px;
    text-decoration: none;
    color: #124b7c;
    font-weight: 600;
}

section {
    padding: 80px 20px;
    max-width: 1100px;
    margin: auto;
}

h2 {
    color: #124b7c;
}

.btn {
    background: #124b7c;
    color: white;
    padding: 12px 25px;
    text-decoration: none;
    border-radius: 4px;
}

footer {
    background: #0b2c4a;
    color: white;
    text-align: center;
    padding: 30px;
}