body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #fff;
    color: #333;
}
.hero {
    background: url('https://images.unsplash.com/photo-1617791160514-ef7dff5b88d3?auto=format&fit=crop&w=1500&q=80') no-repeat center center/cover;
    height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    position: relative;
}
.overlay {
    background-color: rgba(0, 0, 0, 0.6);
    padding: 2rem;
}
.logo {
    width: 120px;
    margin-bottom: 20px;
}
.about, .services, .workflow {
    padding: 3rem 1rem;
    text-align: center;
}
.services {
    background-color: #fef6e4;
}
.service-card {
    background: #fff;
    margin: 1rem auto;
    padding: 1rem;
    border: 1px solid #ccc;
    border-radius: 10px;
    max-width: 300px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}
footer {
    background: #222;
    color: #fff;
    text-align: center;
    padding: 1rem;
}
.btn-whatsapp {
    display: inline-block;
    background: #25d366;
    color: white;
    padding: 0.8rem 1.2rem;
    border-radius: 10px;
    text-decoration: none;
    font-weight: bold;
    margin-top: 1rem;
}
.floating-whatsapp {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1000;
}