/* ==========================================================================
   LAYOUT.CSS — Header, Footer, Grid y Estructura del Sitio
   Don Andrés Corporativo
   ========================================================================== */

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: var(--color-white);
    z-index: calc(var(--z-overlay) + 1);
    transition: box-shadow var(--transition-base);
}

.site-header.is-scrolled {
    box-shadow: var(--shadow-header);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--container-wide);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* Logo */
.site-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
    flex-shrink: 0;
}

.site-logo__icon {
    width: 44px;
    height: 44px;
    background-color: var(--color-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    font-family: var(--font-heading);
    font-weight: var(--font-extrabold);
    font-size: var(--text-xl);
    transition: transform var(--transition-fast);
}

.site-logo:hover .site-logo__icon {
    transform: scale(1.05);
}

.site-logo__text {
    font-family: var(--font-heading);
    font-weight: var(--font-bold);
    font-size: var(--text-xl);
    color: var(--color-gray-900);
    line-height: 1;
}

.site-logo__text span {
    color: var(--color-primary);
}

/* Navegación principal */
.main-nav {
    display: flex;
    align-items: center;
}

.main-nav__list {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.main-nav__item {
    position: relative;
}

.main-nav__link {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: var(--space-sm) var(--space-md);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-gray-700);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: color var(--transition-fast), background-color var(--transition-fast);
    white-space: nowrap;
}

.main-nav__link:hover,
.main-nav__link:focus-visible {
    color: var(--color-primary);
    background-color: var(--color-gray-50);
}

.main-nav__link.is-active {
    color: var(--color-primary);
    font-weight: var(--font-semibold);
}

/* WhatsApp CTA */
.main-nav__whatsapp {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-xs);
    border-radius: 50%;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.main-nav__whatsapp:hover {
    transform: scale(1.15);
    box-shadow: 0 2px 10px rgba(37, 211, 102, 0.3);
}

.main-nav__whatsapp svg {
    display: block;
}

/* Icono dropdown */
.main-nav__arrow {
    width: 16px;
    height: 16px;
    transition: transform var(--transition-fast);
    fill: currentColor;
}

.main-nav__item.is-open .main-nav__arrow {
    transform: rotate(180deg);
}

/* Dropdown */
.dropdown {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    min-width: 240px;
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--color-gray-100);
    padding: var(--space-sm);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
    z-index: var(--z-dropdown);
}

.main-nav__item.is-open .dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown__link {
    display: block;
    padding: var(--space-sm) var(--space-md);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-gray-700);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

.dropdown__link:hover,
.dropdown__link:focus-visible {
    color: var(--color-primary);
    background-color: var(--color-gray-50);
}

/* Hamburguesa */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: calc(var(--z-overlay) + 1);
}

.hamburger__line {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-gray-900);
    border-radius: var(--radius-full);
    transition: transform var(--transition-base), opacity var(--transition-base);
}

.hamburger__line+.hamburger__line {
    margin-top: 6px;
}

.hamburger.is-active .hamburger__line:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.hamburger.is-active .hamburger__line:nth-child(2) {
    opacity: 0;
}

.hamburger.is-active .hamburger__line:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-footer {
    background-color: var(--color-gray-900);
    color: var(--color-gray-400);
    padding-top: var(--space-4xl);
    padding-bottom: var(--space-xl);
}

.site-footer__grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: var(--space-3xl);
    margin-bottom: var(--space-3xl);
}

.footer-col__title {
    font-family: var(--font-heading);
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--color-white);
    margin-bottom: var(--space-lg);
}

.footer-col__text {
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
    color: var(--color-gray-400);
    margin-bottom: var(--space-lg);
}

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

.footer-col__link {
    font-size: var(--text-sm);
    color: var(--color-gray-400);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-col__link:hover {
    color: var(--color-white);
}

.footer-col__contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    font-size: var(--text-sm);
    color: var(--color-gray-400);
    margin-bottom: var(--space-sm);
}

.footer-col__contact-icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    margin-top: 2px;
    fill: var(--color-primary);
}

.site-footer__bottom {
    border-top: 1px solid var(--color-gray-700);
    padding-top: var(--space-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.site-footer__copyright {
    font-size: var(--text-sm);
    color: var(--color-gray-500);
}

.site-footer__legal {
    display: flex;
    gap: var(--space-lg);
}

.site-footer__legal a {
    font-size: var(--text-sm);
    color: var(--color-gray-500);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.site-footer__legal a:hover {
    color: var(--color-white);
}

/* --------------------------------------------------------------------------
   Grid System
   -------------------------------------------------------------------------- */
.grid {
    display: grid;
    gap: var(--space-xl);
}

.grid--2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid--3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid--4 {
    grid-template-columns: repeat(4, 1fr);
}

.grid--about {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

/* Grid About — Alineado arriba */
.grid--about-top {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: start;
}

/* Footer — Logo override */
.site-footer .site-logo {
    margin-bottom: var(--space-lg);
}

.site-footer .site-logo__text {
    color: var(--color-white);
}

/* Offset del header para contenido */
.page-offset {
    padding-top: var(--header-height);
}