/* ============================================================================
   Novatecsystem | Portal Web Corporativo + NEIF
   Módulo M1 — Layout (contenedor, cabecera, navegación, pie).
   ============================================================================ */

.container {
    width: min(var(--container), calc(100% - 2 * var(--space-5)));
    margin: 0 auto;
}

/* ---------------------------------------------------------------------------
   Cabecera
   --------------------------------------------------------------------------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: var(--color-graphite);
    border-bottom: 1px solid var(--color-border);
}

.header-inner {
    display: flex;
    align-items: center;
    gap: var(--space-5);
    min-height: var(--header-h);
}

.brand {
    display: inline-flex;
    align-items: center;
    color: var(--color-text-light);
    font-weight: 700;
    font-size: 1.15rem;
    text-decoration: none;
}

.brand:hover {
    text-decoration: none;
}

.brand-logo {
    height: 44px;
    width: auto;
    max-height: 44px;
}

.brand-text {
    color: var(--color-text-light);
}

/* Navegación */
.site-nav {
    margin-left: auto;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.nav-link {
    display: inline-block;
    padding: var(--space-2) var(--space-3);
    color: var(--color-text-muted);
    font-weight: 600;
    border-radius: var(--radius-sm);
    transition: color var(--transition), background var(--transition);
}

.nav-link:hover {
    color: var(--color-text-light);
    text-decoration: none;
    background: rgba(255, 255, 255, 0.06);
}

.nav-link.is-active {
    color: var(--color-accent);
}

/* ---------------------------------------------------------------------------
   Submenú de navegación (Módulo M10-A)
   --------------------------------------------------------------------------- */
.nav-item {
    position: relative;
}

.nav-submenu {
    display: none;
    list-style: none;
    margin: 0;
    padding: 0;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background: var(--color-graphite);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    z-index: 100;
    padding: var(--space-2) 0;
}

.nav-item.is-open > .nav-submenu {
    display: block;
}

.nav-submenu-link {
    display: block;
    padding: var(--space-2) var(--space-4);
    color: var(--color-text-muted);
    font-weight: 600;
    font-size: 0.92rem;
    white-space: nowrap;
    transition: color var(--transition), background var(--transition);
}

.nav-submenu-link:hover,
.nav-submenu-link:focus {
    color: var(--color-text-light);
    background: rgba(255, 255, 255, 0.06);
    text-decoration: none;
}

.nav-submenu-link.is-active {
    color: var(--color-accent);
}

.nav-link[aria-expanded="true"] {
    color: var(--color-accent);
}

/* Botón de menú móvil (checkbox hack, sin JS requerido) */
.nav-toggle-input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.nav-toggle {
    display: none;
    width: 40px;
    height: 40px;
    margin-left: auto;
    cursor: pointer;
    align-items: center;
    justify-content: center;
}

.nav-toggle-bar,
.nav-toggle-bar::before,
.nav-toggle-bar::after {
    content: "";
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-text-light);
    border-radius: 2px;
    position: relative;
    transition: transform var(--transition);
}

.nav-toggle-bar::before {
    position: absolute;
    top: -7px;
}

.nav-toggle-bar::after {
    position: absolute;
    top: 7px;
}

.nav-toggle-input:checked ~ .nav-toggle .nav-toggle-bar {
    background: transparent;
}

.nav-toggle-input:checked ~ .nav-toggle .nav-toggle-bar::before {
    transform: rotate(45deg);
    top: 0;
}

.nav-toggle-input:checked ~ .nav-toggle .nav-toggle-bar::after {
    transform: rotate(-45deg);
    top: 0;
}

/* ---------------------------------------------------------------------------
   Pie de página
   --------------------------------------------------------------------------- */
.site-footer {
    background: var(--color-graphite);
    color: var(--color-text-muted);
    border-top: 1px solid var(--color-border);
    padding: var(--space-8) 0 var(--space-6);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.2fr;
    gap: var(--space-6);
}

.brand-footer {
    margin-bottom: var(--space-4);
}

.footer-tagline {
    color: var(--color-text-light);
    font-weight: 600;
}

.footer-note {
    font-size: 0.9rem;
}

.footer-title {
    color: var(--color-text-light);
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: var(--space-4);
}

.footer-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.footer-list a {
    color: var(--color-text-muted);
}

.footer-list a:hover {
    color: var(--color-accent);
    text-decoration: none;
}

.footer-contact li {
    word-break: break-word;
}

.footer-bottom {
    border-top: 1px solid var(--color-border);
    margin-top: var(--space-7);
    padding-top: var(--space-5);
    font-size: 0.85rem;
}

.footer-bottom p {
    margin: 0;
}

/* ---------------------------------------------------------------------------
   Estructura de secciones
   --------------------------------------------------------------------------- */
.section {
    padding: var(--space-8) 0;
}

.section-alt {
    background: var(--color-primary-soft);
}

.section-page {
    padding: var(--space-8) 0 var(--space-9);
}

.section-head {
    max-width: 760px;
    margin-bottom: var(--space-7);
}

.section-sub {
    font-size: 1.05rem;
    color: var(--color-ink);
    margin-top: var(--space-4);
}