/* ==========================================================================
   Animaciones de Aparición por Scroll (GPU Accelerated)
   ========================================================================== */

/* Estado inicial (Oculto y desplazado hacia abajo) */
[data-animar="fade-up"] {
    opacity: 0;
    transform: translate3d(0, 30px, 0);
    transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    will-change: opacity, transform;
}

/* Efecto escalonado opcional para grids/cards */
.servicios__grid [data-animar="fade-up"]:nth-child(2),
.portafolio__grid [data-animar="fade-up"]:nth-child(2),
.nosotros__pilares [data-animar="fade-up"]:nth-child(2) {
    transition-delay: 0.1s;
}

.portafolio__grid [data-animar="fade-up"]:nth-child(3),
.nosotros__pilares [data-animar="fade-up"]:nth-child(3) {
    transition-delay: 0.2s;
}

.portafolio__grid [data-animar="fade-up"]:nth-child(4) {
    transition-delay: 0.3s;
}

/* Estado final cuando entra al viewport */
[data-animar].animado {
    opacity: 1;
    transform: translate3d(0, 0, 0);
}

/* Fallback de Accesibilidad: respetar usuarios con sensibilidad al movimiento */
@media (prefers-reduced-motion: reduce) {
    [data-animar] {
        opacity: 1 !important;
        transform: none !important;
        transition: none !important;
    }
}






/* ==========================================================================
   ANIMACIÓN DEL BOTÓN HAMBURGUESA A "X" (Complemento a responsiveDesign.css)
   ========================================================================== */

.header__toggle.is-active .header__toggle-linea:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.header__toggle.is-active .header__toggle-linea:nth-child(2) {
    opacity: 0;
}

.header__toggle.is-active .header__toggle-linea:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ==========================================================================
   MICRO-ANIMACIONES DE UX (ScrollSpy y Feedback)
   ========================================================================== */

/* Enlace activo en navegación según la sección visible */
.header__enlace.is-current {
    color: #ffffff;
    position: relative;
}

.header__enlace.is-current::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: #0ea5e9;
    border-radius: 2px;
}

/* Feedback de error en inputs (Shake sutil) */
@keyframes inputShake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-4px); }
    40%, 80% { transform: translateX(4px); }
}

.contacto__input.is-invalid,
.contacto__select.is-invalid,
.contacto__textarea.is-invalid {
    border-color: #ef4444 !important;
    animation: inputShake 300ms ease-in-out;
}

/* ==========================================================================
   ACCESIBILIDAD OBLIGATORIA (A11Y)
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
    .animar-scroll,
    .header__toggle-linea,
    .proyecto-card__imagen {
        transition: none !important;
        transform: none !important;
        opacity: 1 !important;
        animation: none !important;
    }
}