/* =========================================================================
   CITEM — Navegación: "Blockout Suizo" (Standalone Theme Folder)
   Header navy con crimson bottom, tipografía 900, sin micro-animaciones.
   ========================================================================= */

.main-header {
    width: 100%;
    height: var(--nav-height);
    background-color: var(--c-navy);
    color: var(--c-cream);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 5px solid var(--c-crimson);
    display: flex;
    align-items: center;
    transition: transform 0.3s cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 0.3s ease;
}

.main-header.is-scrolled {
    box-shadow: 0 10px 0 var(--c-navy);
}

.main-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    padding: 0 1.5rem;
    max-width: 100%;
}

/* --- Logo --- */
.logo a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-heading);
    font-weight: 900;
    font-size: 2rem;
    letter-spacing: -1px;
    color: var(--c-cream);
}

.logo img {
    height: 48px;
    width: auto;
    filter: brightness(0) invert(1) sepia(0) saturate(0) hue-rotate(0deg); 
}

.logo span {
    color: var(--c-cream);
}

/* --- Nav Desktop --- */
.main-nav ul {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.main-nav a {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 900;
    text-transform: uppercase;
    color: var(--c-cream);
    position: relative;
    padding-bottom: 0;
    opacity: 1;
    transition: none;
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--c-crimson);
}

.main-nav a:hover::after,
.main-nav a.active::after {
    display: none;
}

/* --- Hamburger Mobile --- */
.mobile-menu-btn {
    display: none;
    background: transparent;
    color: var(--c-cream);
    border: none;
    font-size: 2rem;
    cursor: pointer;
}

.mobile-menu-btn:focus-visible {
    outline: var(--border-weight) solid var(--c-cream);
    outline-offset: 4px;
}

/* --- Tablet / small desktop: compact nav --- */
@media (max-width: 1200px) and (min-width: 769px) {
    .logo img {
        height: 36px;
    }

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

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

    .main-nav .nav-cta {
        padding: 0.5rem 1rem;
        font-size: 0.85rem;
        white-space: nowrap;
    }
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }

    /* Ocultar el nav por defecto — fixed para salir del stacking context del header */
    .main-nav {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        width: 100%;
        height: auto;
        max-height: calc(100vh - var(--nav-height));
        overflow-y: auto;
        background-color: var(--c-navy);
        padding: 0;
        transform: translateY(-110%);
        opacity: 0;
        transition: transform 0.4s ease, opacity 0.3s ease;
        z-index: 999;
        pointer-events: none;
        border-bottom: 5px solid var(--c-crimson);
    }

    .main-nav.is-open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .main-nav ul {
        display: flex;
        flex-direction: column;
        align-items: stretch;
        justify-content: flex-start;
        width: 100%;
        height: auto;
        gap: 0;
    }

    .main-nav ul li {
        width: 100%;
    }

    .main-nav a {
        display: block;
        color: var(--c-cream);
        font-size: 1.5rem;
        width: 100%;
        padding: 1rem 1.5rem;
        border-bottom: var(--border-weight) solid rgba(var(--c-cream-rgb), 0.2);
    }

    .main-nav a:hover,
    .main-nav a.active {
        background-color: var(--c-cream);
        color: var(--c-navy);
    }

    /* CTA button in mobile nav */
    .main-nav .nav-cta {
        background-color: var(--c-crimson);
        color: var(--c-cream);
        border-bottom: none;
        text-align: center;
    }
    .main-nav .nav-cta:hover {
        background-color: var(--c-cream);
        color: var(--c-navy);
    }
}

/* --- Nav CTA Button (Desktop only) ---
   Wrapped in min-width to prevent cascading over mobile nav styles.
   Same selector .main-nav .nav-cta exists in ≤768px block above — without
   this guard, the desktop padding/border/shadow leak into mobile. */
@media (min-width: 769px) {
    .main-nav .nav-cta {
        background-color: var(--c-crimson);
        color: var(--c-cream);
        padding: 0.6rem 1.5rem;
        border: var(--border-weight) solid var(--c-cream);
        transition: background-color 0.15s ease, transform 0.1s ease, box-shadow 0.1s ease;
        box-shadow: 3px 3px 0 rgba(0,0,0,0.3);
        letter-spacing: 0.5px;
    }

    .main-nav .nav-cta:hover {
        background-color: var(--c-cream);
        color: var(--c-navy);
        transform: translate(2px, 2px);
        box-shadow: 1px 1px 0 rgba(0,0,0,0.3);
    }
}