.main-header {
    padding: 2rem 0;
    text-align: center;
}

.header-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.profile-image {
    border-radius: 50%;
    border: 3px solid var(--secondary-color);
    object-fit: cover;
}

.header-text h1 {
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
    font-size: 2.5rem;
}

.subtitle {
    color: var(--text-color);
    opacity: 0.8;
    font-size: 1.1rem;
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 0.5rem;
    border-radius: 50%;
    transition: background 0.3s ease;
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
}