body {
    font-family: Arial;
    margin: 0;
    background: #f5f5f5;
}

header {
    background: #1b5e20;
    color: white;
    padding: 15px;
    text-align: center;
}

nav a {
    margin: 10px;
    color: white;
    text-decoration: none;
}

section {
    padding: 40px;
    margin: 20px;
    background: white;
    border-radius: 10px;
}

img {
    width: 100%;
    max-width: 500px;
    border-radius: 10px;
}

.btn {
    display: inline-block;
    padding: 10px 15px;
    background: #2e7d32;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    margin: 5px;
}

.whatsapp-float {
    position: fixed;
    width: 60px;
    height: 60px;
    bottom: 20px;
    right: 20px;
    background-color: #25D366;
    color: white;
    border-radius: 50%;
    text-align: center;
    font-size: 30px;
    line-height: 60px;
    box-shadow: 2px 2px 10px rgba(0,0,0,0.3);
    z-index: 100;
    transition: 0.3s;
}

.whatsapp-float:hover {
    background-color: #1ebe5d;
    transform: scale(1.1);
}