/* Додаткові стилі для завдань */
.return-home {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 10px 20px;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    transition: all 0.3s ease;
}

.return-home:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
}

.navbar {
    background: var(--surface-color);
    padding: 1rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
}

.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-size: 1.5em;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: bold;
}

.nav-links {
    display: flex;
    gap: 1rem;
}

.nav-link {
    color: var(--text-color);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.nav-link:hover {
    background: var(--primary-color);
}

.nav-link.active {
    background: var(--primary-color);
}

main {
    margin-top: 80px;
    padding: 2rem;
}