/*
 * layout.css
 * Contenedor, cabecera, navegacion, menu movil, pie.
 */

.container {
    width: min(100% - (var(--container-pad) * 2), var(--container-w));
    margin-inline: auto;
}

/* --- skip link --- */
.skip-nav {
    position: absolute;
    top: -120px;
    left: var(--space-sm);
    z-index: var(--z-menu);
    padding: var(--space-2xs) var(--space-sm);
    background: var(--color-ink);
    color: var(--color-paper);
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
    transition: top var(--dur-fast) var(--ease-standard);
}

.skip-nav:focus-visible {
    top: 0;
}

/* --- header --- */
.site-top {
    position: sticky;
    top: 0;
    z-index: var(--z-header);
    background: var(--color-paper);
    border-bottom: 1px solid var(--color-border);
}

.site-top-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-sm);
    padding-block: var(--space-xs);
}

.brand {
    display: flex;
    align-items: center;
    gap: var(--space-2xs);
    font-family: var(--font-serif);
    font-weight: 600;
    font-size: 1.15rem;
    color: var(--color-ink);
}

.brand-mark {
    width: 2.25rem;
    height: 2.25rem;
    flex-shrink: 0;
}

.brand-word-veil {
    color: var(--color-deep);
    font-style: italic;
    font-weight: 400;
}

.site-top-nav {
    display: none;
}

.site-top-nav-list {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.site-top-nav-link {
    font-size: var(--fs-small);
    font-weight: 500;
    padding-block: var(--space-3xs);
    border-bottom: 2px solid transparent;
    transition: border-color var(--dur-fast) var(--ease-standard), color var(--dur-fast) var(--ease-standard);
}

.site-top-nav-link:hover,
.site-top-nav-link[aria-current='page'] {
    color: var(--color-deep);
    border-bottom-color: var(--color-deep);
}

.site-top-cta {
    display: none;
}

/* --- boton hamburguesa --- */
.menu-btn {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: var(--radius-sm);
}

.menu-btn-bar {
    display: block;
    width: 1.5rem;
    height: 2px;
    background: var(--color-ink);
    border-radius: 2px;
    transition: transform var(--dur-base) var(--ease-standard), opacity var(--dur-fast) var(--ease-standard);
}

.menu-btn[aria-expanded='true'] .menu-btn-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.menu-btn[aria-expanded='true'] .menu-btn-bar:nth-child(2) {
    opacity: 0;
}

.menu-btn[aria-expanded='true'] .menu-btn-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

@media (min-width: 61.25rem) {
    .site-top-nav {
        display: block;
    }

    .site-top-cta {
        display: inline-flex;
    }

    .menu-btn {
        display: none;
    }
}

/* --- menu movil de pantalla completa --- */
.mobile-menu {
    display: none;
    position: fixed;
    inset: 0;
    z-index: var(--z-menu);
    background: var(--color-paper);
    overflow-y: auto;
}

.mobile-menu.is-open {
    display: block;
}

.mobile-menu-inner {
    display: flex;
    flex-direction: column;
    min-height: 100%;
    padding: var(--space-md) var(--container-pad) var(--space-xl);
}

.mobile-menu-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-lg);
}

.mobile-menu-close {
    width: 2.75rem;
    height: 2.75rem;
    font-size: 1.5rem;
    border-radius: var(--radius-sm);
}

.mobile-menu-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.mobile-menu-link {
    font-family: var(--font-serif);
    font-size: 1.6rem;
}

.mobile-menu-foot {
    margin-top: auto;
    padding-top: var(--space-lg);
    font-size: var(--fs-small);
    color: var(--color-deep-dark);
}

@media (min-width: 61.25rem) {
    .mobile-menu {
        display: none !important;
    }
}

/* --- pie --- */
.site-foot {
    background: var(--color-ink);
    color: var(--color-paper);
    padding-block: var(--space-xl) var(--space-lg);
}

.site-foot-inner {
    display: grid;
    gap: var(--space-lg);
    grid-template-columns: 1fr;
}

.site-foot-brand {
    font-family: var(--font-serif);
    font-size: 1.35rem;
    margin-bottom: var(--space-xs);
}

.site-foot-text {
    color: rgba(255, 255, 255, 0.72);
    max-width: 42ch;
}

.site-foot-col-title {
    font-family: var(--font-sans);
    font-size: var(--fs-small);
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.55);
    margin-bottom: var(--space-xs);
}

.site-foot-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-2xs);
}

.site-foot-links a:hover {
    color: var(--color-lavanda);
}

.site-foot-bottom {
    margin-top: var(--space-lg);
    padding-top: var(--space-sm);
    border-top: 1px solid rgba(255, 255, 255, 0.16);
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    justify-content: space-between;
    font-size: var(--fs-small);
    color: rgba(255, 255, 255, 0.55);
}

@media (min-width: 48rem) {
    .site-foot-inner {
        grid-template-columns: 1.4fr 1fr 1fr;
    }
}