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

body {
    font-family: 'Arial', sans-serif;
    background-color: #f4f4f4;
}

nav {
    width: 100vw;
    height: 70px;
    background-color: #333;
    color: #fff;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 40px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.5);
}

nav h1 {
    font-size: 24px;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 20px;
}

nav ul li {
    font-size: 18px;
}

nav ul li a {
    text-decoration: none;
    color: white;
    transition: color 0.3s ease;
}

nav ul li a:hover {
    color: #f39c12;
}

.hero {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    position: sticky;
    top: 70px; /* Leaves room for sticky navbar */
    background-color: #e1e1e1;
    text-align: center;
    transition: background-color 0.6s ease;
}

.hero img {
    height: 300px;
    width: 300px;
    border-radius: 50%;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
    transition: transform 0.6s ease;
}

.hero:hover img {
    transform: scale(1.1);
}

.hero-1 {
    background: linear-gradient(135deg, #7f7fd5, #86a8e7, #91eae4);
}

.hero-2 {
    background: linear-gradient(135deg, #f12711, #f5af19);
}

.hero-3 {
    background: linear-gradient(135deg, #00c6ff, #0072ff);
}

.hero-4 {
    backg