/**
 * ============================================================
 * FOOTER.CSS - Estilos del pie de página
 * ============================================================
 * 
 * Archivo: footer.css
 * Descripción: Estilos para el footer completo incluyendo
 *              navegación, información de contacto y subfooter
 * 
 * Autor: TeknoSoft Development Team
 * Fecha: Febrero 2026
 * 
 * Dependencias: reset.css, variables.css, global.css
 * ============================================================
 */

/* ============================================================
   FOOTER PRINCIPAL
   ============================================================ */

.footer {
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-16) 0 0;
    position: relative;
    overflow: hidden;
}

/* Decoración superior del footer */
.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, 
        var(--color-accent) 0%, 
        var(--color-cta) 50%, 
        var(--color-accent) 100%
    );
}

/* ============================================================
   GRID DEL FOOTER (3 COLUMNAS)
   ============================================================ */

.footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-10);
    padding-bottom: var(--spacing-12);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

/* ============================================================
   COLUMNA: SOBRE TEKNOSOFT
   ============================================================ */

.footer__about {
    max-width: 320px;
}

.footer__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-6);
}

.footer__logo-image {
    width: 260px;
    height: 64px;
    filter: brightness(0) invert(1);
    /* Convierte el logo a blanco para mejor contraste en fondo oscuro */
}

.footer__logo-text {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-white);
}

.footer__logo-text span {
    color: var(--color-accent);
}

.footer__description {
    font-size: var(--font-size-base);
    color: rgba(255, 255, 255, 0.7);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-6);
}

/* Redes sociales */
.footer__social {
    display: flex;
    gap: var(--spacing-3);
}

.footer__social-link {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    font-size: var(--font-size-lg);
    transition: var(--transition-fast);
}

.footer__social-link:hover {
    background: var(--color-accent);
    color: var(--color-primary);
    transform: translateY(-3px);
}

/* ============================================================
   COLUMNAS DE NAVEGACIÓN
   ============================================================ */

.footer__column {
    padding-left: var(--spacing-4);
}

.footer__title {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-bold);
    color: var(--color-white);
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-wide);
    margin-bottom: var(--spacing-6);
    position: relative;
    padding-bottom: var(--spacing-3);
}

.footer__title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background: var(--color-accent);
}

.footer__nav {
    list-style: none;
}

.footer__nav-item {
    margin-bottom: var(--spacing-3);
}

.footer__nav-link {
    font-size: var(--font-size-base);
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
}

.footer__nav-link::before {
    content: '';
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width var(--duration-fast);
}

.footer__nav-link:hover {
    color: var(--color-white);
    padding-left: var(--spacing-2);
}

.footer__nav-link:hover::before {
    width: 8px;
}

/* ============================================================
   COLUMNA: CONTACTO
   ============================================================ */

.footer__contact-list {
    list-style: none;
}

.footer__contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-4);
}

.footer__contact-icon {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-base);
    color: var(--color-accent);
}

.footer__contact-text {
    font-size: var(--font-size-base);
    color: rgba(255, 255, 255, 0.7);
    line-height: var(--line-height-normal);
}

.footer__contact-text a {
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--duration-fast);
}

.footer__contact-text a:hover {
    color: var(--color-accent);
}

.footer__contact-text strong {
    display: block;
    color: var(--color-white);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-1);
}

/* Horario */
.footer__schedule {
    margin-top: var(--spacing-4);
    padding: var(--spacing-4);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    border-left: 3px solid var(--color-accent);
}

.footer__schedule p {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.7);
    margin: 0;
}

.footer__schedule strong {
    color: var(--color-white);
}

/* ============================================================
   SUBFOOTER
   ============================================================ */

.footer__bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-4);
    padding: var(--spacing-6) 0;
}

.footer__copyright {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.6);
}

.footer__legal {
    display: flex;
    gap: var(--spacing-6);
    list-style: none;
}

.footer__legal-link {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.6);
    transition: color var(--duration-fast);
}

.footer__legal-link:hover {
    color: var(--color-accent);
}

/* Separador en links legales */
.footer__legal li:not(:last-child)::after {
    content: '|';
    margin-left: var(--spacing-6);
    color: rgba(255, 255, 255, 0.3);
}

/* ============================================================
   BOTÓN BACK TO TOP
   ============================================================ */

.back-to-top {
    position: fixed;
    bottom: var(--spacing-6);
    right: var(--spacing-6);
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--border-radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    font-size: var(--font-size-lg);
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    z-index: var(--z-sticky);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition-normal);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--color-cta);
    transform: translateY(-3px);
}

.back-to-top:active {
    transform: translateY(0);
}

/* ============================================================
   NEWSLETTER (OPCIONAL - SI SE IMPLEMENTA)
   ============================================================ */

.footer__newsletter {
    margin-top: var(--spacing-6);
}

.footer__newsletter-title {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-white);
    margin-bottom: var(--spacing-3);
}

.footer__newsletter-form {
    display: flex;
    gap: var(--spacing-2);
}

.footer__newsletter-input {
    flex: 1;
    padding: var(--spacing-3) var(--spacing-4);
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius);
    color: var(--color-white);
    font-size: var(--font-size-sm);
}

.footer__newsletter-input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.footer__newsletter-input:focus {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--color-accent);
}

.footer__newsletter-btn {
    padding: var(--spacing-3) var(--spacing-4);
    background: var(--color-accent);
    border: none;
    border-radius: var(--border-radius);
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: var(--transition-fast);
}

.footer__newsletter-btn:hover {
    background: var(--color-white);
}

/* ============================================================
   FIN DEL ARCHIVO
   ============================================================ */