body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f4f7f6;
    color: #333333;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    background: linear-gradient(135deg, #2c3e50, #3498db);
    color: white;
    text-align: center;
    padding: 2rem 1rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

header h1 {
    margin: 0 0 1rem 0;
    font-size: 2.2rem;
}

header img {
    width: 150px;
    height: 150px;
    object-fit: cover;
    border-radius: 50%;
    border: 4px solid white;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

nav {
    background-color: #ffffff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    padding: 0.5rem 0;
}

nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    text-align: center;
}

nav li {
    display: inline-block;
}

nav a {
    color: #3498db;
    text-decoration: none;
    font-weight: 600;
    padding: 0.5rem 1rem;
    transition: color 0.3s ease;
}

nav a:hover {
    color: #2c3e50;
    text-decoration: underline;
}

main {
    max-width: 800px;
    width: 90%;
    margin: 2rem auto;
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    text-align: center;
    flex: 1;
}

main p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

iframe {
    border-radius: 6px;
    border: 1px solid #e0e0e0 !important;
}

footer {
    background-color: #2c3e50;
    color: white;
    text-align: center;
    padding: 1rem;
    font-size: 0.9rem;
    margin-top: auto;
}