/* =========================================================================
   HEADER.CSS — Header negro, navegación desktop/mobile, drawer, overlay.
   Sprint 9. Convención BEM, prefijo imp-, mobile-first.
   ========================================================================= */

/* ── Bloque header ─────────────────────────────────── */
.imp-header {
    background-color: var(--color-neutral-900);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    transition: box-shadow var(--transition-base);
}

/* ── Inner (contenedor) ────────────────────────────── */
.imp-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    padding-top: var(--space-3);
    padding-bottom: var(--space-3);
    min-height: 56px;
}

@media (min-width: 1024px) {
    .imp-header__inner {
        padding-top: var(--space-4);
        padding-bottom: var(--space-4);
        min-height: 64px;
    }
}

/* ── Brand ─────────────────────────────────────────── */
.imp-header__brand {
    flex-shrink: 0;
}

.imp-header__brand-link {
    font-family: var(--font-display);
    font-weight: var(--font-weight-black);
    font-size: var(--text-xl);
    color: #ffffff;
    text-decoration: none;
    transition: color var(--transition-fast);
    white-space: nowrap;
}

.imp-header__brand-link:hover {
    color: var(--color-primary-400);
}

.imp-header__brand .custom-logo-link {
    display: block;
    line-height: 1;
}

.imp-header__brand .custom-logo {
    max-height: 40px;
    width: auto;
    display: block;
}

@media (min-width: 1024px) {
    .imp-header__brand .custom-logo {
        max-height: 48px;
    }
}

/* ── Navegación desktop ────────────────────────────── */
.imp-header__nav {
    display: none;
}

@media (min-width: 1024px) {
    .imp-header__nav {
        display: block;
    }
}

.imp-header__menu {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    list-style: none;
    margin: 0;
    padding: 0;
}

.imp-header__menu li {
    margin: 0;
}

.imp-header__menu a {
    display: block;
    padding: var(--space-2) var(--space-3);
    font-family: var(--font-body);
    font-weight: var(--font-weight-semibold);
    font-size: var(--text-sm);
    color: var(--color-neutral-200);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition:
        color var(--transition-fast),
        background-color var(--transition-fast);
    white-space: nowrap;
}

.imp-header__menu a:hover {
    color: var(--color-primary-400);
    background-color: rgb(255 255 255 / 0.08);
}

.imp-header__menu a:focus-visible {
    outline-color: var(--color-primary-400);
    outline-offset: -2px;
}

.imp-header__menu .current-menu-item a {
    color: var(--color-primary-400);
}

/* ── Toggle hamburguesa (mobile) ───────────────────── */
.imp-header__toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-2);
    background: none;
    border: none;
    border-radius: var(--radius-md);
    color: var(--color-neutral-200);
    cursor: pointer;
    transition:
        color var(--transition-fast),
        background-color var(--transition-fast);
    /* Oculto en desktop */
}

.imp-header__toggle:hover {
    color: var(--color-primary-400);
    background-color: rgb(255 255 255 / 0.08);
}

.imp-header__toggle:focus-visible {
    outline: 2px solid var(--color-primary-400);
    outline-offset: 2px;
}

@media (min-width: 1024px) {
    .imp-header__toggle {
        display: none;
    }
}

/* ── Drawer (mobile) ───────────────────────────────── */
.imp-header__drawer {
    position: fixed;
    top: 0;
    right: 0;
    width: 300px;
    max-width: 85vw;
    height: 100vh;
    height: 100dvh;
    z-index: var(--z-drawer);

    background-color: var(--color-neutral-800);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;

    transform: translateX(100%);
    transition: transform var(--transition-base);
}

/* Drawer abierto */
body.imp-nav-open .imp-header__drawer {
    transform: translateX(0);
}

/* Inner del drawer */
.imp-header__drawer-inner {
    padding: var(--space-6);
    padding-top: var(--space-16); /* Espacio superior amplio */
}

/* ── Botón cerrar ──────────────────────────────────── */
.imp-header__drawer-close {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-2);
    background: none;
    border: none;
    border-radius: var(--radius-md);
    color: var(--color-neutral-300);
    cursor: pointer;
    transition:
        color var(--transition-fast),
        background-color var(--transition-fast);
}

.imp-header__drawer-close:hover {
    color: #ffffff;
    background-color: rgb(255 255 255 / 0.1);
}

.imp-header__drawer-close:focus-visible {
    outline: 2px solid var(--color-primary-400);
    outline-offset: 2px;
}

/* ── Menú del drawer ───────────────────────────────── */
.imp-header__drawer-menu {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.imp-header__drawer-menu li {
    margin: 0;
}

.imp-header__drawer-menu a {
    display: block;
    padding: var(--space-3) var(--space-4);
    font-family: var(--font-body);
    font-weight: var(--font-weight-semibold);
    font-size: var(--text-base);
    color: var(--color-neutral-200);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition:
        color var(--transition-fast),
        background-color var(--transition-fast);
}

.imp-header__drawer-menu a:hover {
    color: #ffffff;
    background-color: rgb(255 255 255 / 0.08);
}

.imp-header__drawer-menu a:focus-visible {
    outline: 2px solid var(--color-primary-400);
    outline-offset: -2px;
}

.imp-header__drawer-menu .current-menu-item a {
    color: var(--color-primary-400);
}

/* ── Overlay ───────────────────────────────────────── */
.imp-header__overlay {
    position: fixed;
    inset: 0;
    z-index: calc(var(--z-drawer) - 1);
    background-color: rgb(0 0 0 / 0.6);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base);
}

body.imp-nav-open .imp-header__overlay {
    opacity: 1;
    pointer-events: auto;
}

/* ── Scroll lock ───────────────────────────────────── */
body.imp-nav-open {
    overflow: hidden;
}

/* ── Respetar prefers-reduced-motion ───────────────── */
@media (prefers-reduced-motion: reduce) {
    .imp-header__drawer {
        transition: none;
    }

    .imp-header__overlay {
        transition: none;
    }
}