.main-header {
    background: linear-gradient(135deg, var(--blue) 0%, var(--orange) 100%);
    box-shadow: var(--box-shadow);
    padding: 1.5rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 3px solid var(--orange);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo img {
    height: 60px;
    width: auto;
    object-fit: contain;
    filter: brightness(0) invert(1);
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
}

.main-nav {
    flex: 1;
    display: flex;
    justify-content: flex-end;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.main-nav a {
    color: var(--white);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    position: relative;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background-color: var(--orange);
    transition: width 0.3s;
}

.main-nav a:hover {
    color: var(--white);
    background-color: rgba(255, 255, 255, 0.1);
}

.main-nav a:hover::after {
    width: 80%;
}

.main-nav .active {
    background-color: var(--white);
    color: var(--blue);
}

.main-nav .active:hover {
    color: var(--blue);
    background-color: var(--white);
}

/* Responsive Design */
@media (max-width: 768px) {
    .main-header {
        padding: 1rem 0;
    }

    .logo img {
        height: 40px;
        width: auto;
    }

    .logo-text {
        font-size: 1.2rem;
    }

    .main-nav ul {
        gap: 1rem;
    }

    .main-nav a {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }
}