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

body {
    background: #0f172a;
    color: #fff;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 60px;
    background: #020617;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 10;
}

header h1 {
    color: #38bdf8;
}

nav a {
    margin-left: 20px;
    cursor: pointer;
    color: #fff;
    text-decoration: none;
}

nav a:hover {
    color: #38bdf8;
}

main {
    padding-top: 120px;
}

.section {
    display: none;
    padding: 60px;
    min-height: 100vh;
}

.section.active {
    display: block;
}

.profile-img {
    width: 180px;
    border-radius: 50%;
    margin-bottom: 20px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
    margin-top: 20px;
}

.grid span, .grid a {
    background: #1e293b;
    padding: 15px;
    text-align: center;
    border-radius: 8px;
    color: white;
    text-decoration: none;
}

.card, .project {
    background: #1e293b;
    padding: 20px;
    border-radius: 10px;
    margin-top: 20px;
}

.project img {
    width: 100%;
    border-radius: 10px;
}

video {
    width: 100%;
    margin-top: 20px;
}

form {
    max-width: 500px;
    margin: auto;
}

form input, form textarea, form button {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    border-radius: 6px;
    border: none;
}

form button {
    background: #38bdf8;
    font-weight: bold;
    cursor: pointer;
}

footer {
    background: #020617;
    text-align: center;
    padding: 20px;
}