.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 50;
    background: linear-gradient(to bottom, rgba(0,0,0,0.8) 0%, rgba(0,0,0,0) 100%);
    transition: background 0.3s ease;
}

.site-header.is-scrolled {
    background: rgba(20, 20, 20, 0.95);
    backdrop-filter: blur(10px);
}

.site-header__inner {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    padding: 1rem var(--container-padding);
}

.menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--color-text);
    padding: 0.5rem;
    margin-right: 1rem;
    cursor: pointer;
    transition: color 0.2s;
}

.menu-toggle:hover, .menu-toggle:focus {
    color: var(--color-accent);
}

.site-logo {
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    font-size: 1.2rem;
    font-weight: 800;
    letter-spacing: 0.05em;
    color: var(--color-text);
    text-transform: uppercase;
}

.site-logo__image {
    width: 32px;
    height: 32px;
    display: inline-block;
}

.header-actions {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 1.5rem;
}

.header-actions .search-trigger,
.header-actions .user-profile {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 999px;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    transition: background 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
}

.header-actions .search-trigger:hover,
.header-actions .search-trigger:focus,
.header-actions .user-profile:hover,
.header-actions .user-profile:focus {
    background: rgba(255,255,255,0.12);
    border-color: rgba(233,9,20,0.35);
}

.site-nav a.is-active,
.site-nav a[aria-current="page"] {
    background: rgba(233,9,20,0.12);
    color: var(--color-accent);
    border-left-color: var(--color-accent);
}

.site-nav a {
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.header-actions a {
    color: var(--color-text);
    display: inline-flex;
    transition: color 0.2s;
}

.header-actions a:hover, .header-actions a:focus {
    color: var(--color-accent);
}

/* Sidebar Navigation */
.site-nav {
    position: fixed;
    top: 0;
    left: -320px;
    width: 300px;
    max-width: 85vw;
    height: 100vh;
    background: var(--color-surface);
    flex-direction: column;
    padding: 0;
    align-items: flex-start;
    transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 5px 0 25px rgba(0,0,0,0.8);
    display: flex;
    z-index: 60;
    overflow-y: auto;
}

.site-nav.is-open {
    left: 0;
}

.site-nav__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 1.5rem;
    border-bottom: 1px solid var(--color-line);
    margin-bottom: 1rem;
}

.menu-close {
    background: transparent;
    border: none;
    color: var(--color-text);
    padding: 0.5rem;
    cursor: pointer;
    transition: color 0.2s;
}

.menu-close:hover, .menu-close:focus {
    color: var(--color-accent);
}

.nav-divider {
    width: 100%;
    height: 1px;
    background: var(--color-line);
    border: none;
    margin: 1rem 0;
}

.site-nav a {
    color: var(--color-text);
    font-size: 1.1rem;
    font-weight: 500;
    padding: 0.8rem 2rem;
    width: 100%;
    border-left: 4px solid transparent;
    transition: all 0.2s;
}

.site-nav a:hover, .site-nav a:focus {
    background: rgba(255,255,255,0.05);
    color: var(--color-accent);
    border-left-color: var(--color-accent);
}

/* Overlay for Sidebar */
.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(3px);
    z-index: 55;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.sidebar-overlay.is-active {
    opacity: 1;
    visibility: visible;
}

.site-main {
    padding: 4rem 0 4rem; /* Spazio per l'header fixed in pag internal */
}

/* Home non ha top padding e l'hero riempie sottomenu */
body[data-route="home"] .site-main {
    padding-top: 0;
}

.site-footer {
    padding: 3rem var(--container-padding);
    color: var(--color-muted);
    background: var(--color-surface);
    border-top: 1px solid var(--color-line);
}

@media (min-width: 1025px) {
    .menu-toggle {
        margin-right: 2rem;
    }
}