* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
    scroll-behavior: smooth;
}

body {
    transition: background 0.3s, color 0.3s;
    background: #f6fff8;
    margin: 0;
    display: flex;
    flex-direction: column;
    padding-top: 72px;
    overflow-x: hidden;
}

/* header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 24px;
    gap: 18px;
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    z-index: 1000;
}

header .nav-links {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 32px;
    align-items: center;
}

header .nav-links li {
    margin: 0;
}

header .nav-links li a {
    color: #fffffa;
    text-decoration: none;
    padding: 8px 0;
    display: inline-block;
    font-size: 1rem;
}

header h1 {
    font-size: 1.6rem;
    line-height: 1.1;
}

header nav {
    margin-left: auto;
}

/* img */
.hero-image {
    width: 500px;
    height: 500px;
    border-radius: 50%;
    object-fit: cover;
}