@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;700;800&display=swap');

/* Header stile moderno */
.header {
    background: white;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: flex-start;
    align-items: center;
    gap: 3rem;
}

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

.logo a {
    text-decoration: none;
    color: inherit;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 800;
    color: #1a1a1a;
    letter-spacing: -0.02em;
    transition: color 0.2s;
}

.logo a:hover h1 {
    color: #667eea;
}

.logo .highlight {
    color: #ff4444;
}

.nav-links {
    display: flex;
    gap: 1rem;
    align-items: center;
    list-style: none;
    flex-wrap: wrap;
}

.nav-links > li > a {
    text-decoration: none;
    color: #666;
    font-weight: 500;
    transition: color 0.2s;
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    font-size: 0.9rem;
    white-space: nowrap;
}

.nav-links > li > a:hover {
    color: #1a1a1a;
    background: #f8f9fa;
}

/* Sottomenu */
.has-submenu {
    position: relative;
}

.submenu {
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    border-radius: 8px;
    padding: 0.5rem 0;
    min-width: 220px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1000;
    list-style: none;
}

.has-submenu:hover > .submenu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.submenu li {
    margin: 0;
    position: relative;
}

.submenu a {
    display: block;
    padding: 0.75rem 1.5rem;
    color: #666;
    font-size: 0.9rem;
    border-radius: 0;
    transition: all 0.2s;
    text-decoration: none;
}

.submenu a:hover {
    background: #667eea;
    color: white;
}

/* Sottomenu di secondo livello */
.submenu .has-submenu > .submenu {
    left: 100%;
    top: 0;
    margin-left: 0.5rem;
}

.submenu .has-submenu > a::after {
    content: '›';
    float: right;
    margin-left: 1rem;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }

    .nav-links {
        flex-direction: column;
        width: 100%;
    }

    .nav-links > li {
        width: 100%;
    }

    .nav-links > li > a {
        display: block;
        width: 100%;
        text-align: center;
    }

    .submenu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: #f8f9fa;
        margin-top: 0.5rem;
    }

    .submenu .has-submenu > .submenu {
        left: 0;
        margin-left: 1rem;
    }
}