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

body, html {
    font-family: Arial, sans-serif;
    scroll-behavior: smooth;
}

header {
    position: fixed;
    width: 100%;
    background: #fff;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: auto;
    padding: 1rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
}

.nav-links li {
    list-style: none;
    display: inline;
    margin-left: 20px;
}

.nav-links a {
    text-decoration: none;
    color: #333;
}

section {
    padding: 100px 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
}

#hero {
    background: #f0f0f0;
}

.btn {
    display: inline-block;
    margin-top: 20px;
    padding: 10px 20px;
    background: #000;
    color: #fff;
    text-decoration: none;
    border-radius: 5px;
}

.service {
    margin: 20px;
    max-width: 400px;
}