* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    background-color: #ffffff;
    color: #333;
}

header {
    background-color: #004080;
    color: white;
    padding: 1.2em;
    text-align: center;
}

nav {
    margin-top: 10px;
}

nav a {
    color: white;
    margin: 0 1em;
    text-decoration: none;
    font-weight: bold;
}

.hero {
    text-align: center;
    background-color: #e6f2ff;
    padding: 2em 5%;
}

.hero-img {
    width: 100%;
    height: auto;
    display: block;
    margin-bottom: 1em;
}

main {
    padding: 2em 5%;
    width: 100%;
}

section h2, section h3 {
    color: #004080;
    margin-bottom: 0.5em;
}

footer {
    background-color: #f2f2f2;
    text-align: center;
    padding: 1em;
    margin-top: 2em;
    width: 100%;
}

.whatsapp {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: #25D366;
    color: white;
    padding: 12px 20px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: bold;
    box-shadow: 0 4px 6px rgba(0,0,0,0.2);
    z-index: 1000;
}