/* ========================================
   Reset y Estilos Base - Metasoft Solutions
   ======================================== */

/* Reset CSS */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Estilos Base */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-dark);
}

/* Remove underline from all links */
a {
    text-decoration: none;
    color: inherit;
}

a:hover {
    text-decoration: none;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1rem;
}

@media (min-width: 1024px) {
    .container {
        padding: 0 2rem;
    }
}

/* ========================================
   Smooth Scrolling
   ======================================== */
html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

/* ========================================
   Animaciones de Entrada de Secciones
   ======================================== */

/* Estado inicial: oculto y desplazado */
section {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 1s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                transform 1s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Hero siempre visible (sin animación) */
section.hero {
    opacity: 1;
    transform: translateY(0);
}

/* Estado visible: aparece con fade + slide */
section.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Animaciones progresivas para contenido interno */
.is-visible .about-header,
.is-visible .services-header,
.is-visible .methodology-header,
.is-visible .values-header,
.is-visible .contact-header,
.is-visible .why-header,
.is-visible .faq-header {
    animation: fadeInUp 0.8s ease-out backwards;
    animation-delay: 0.2s;
}

.is-visible .about-intro,
.is-visible .services-intro,
.is-visible .methodology-intro,
.is-visible .values-intro,
.is-visible .why-intro,
.is-visible .faq-intro {
    animation: fadeInUp 0.8s ease-out backwards;
    animation-delay: 0.3s;
}

.is-visible .about-content,
.is-visible .contact-wrapper {
    animation: fadeInUp 0.8s ease-out backwards;
    animation-delay: 0.4s;
}

/* Cards y grids con delay progresivo */
.is-visible .services-grid > *,
.is-visible .methodology-grid > *,
.is-visible .values-grid > *,
.is-visible .why-grid > *,
.is-visible .faq-item {
    opacity: 0;
    animation: fadeInUp 0.6s ease-out forwards;
}

.is-visible .services-grid > *:nth-child(1),
.is-visible .methodology-grid > *:nth-child(1),
.is-visible .values-grid > *:nth-child(1),
.is-visible .why-grid > *:nth-child(1),
.is-visible .faq-item:nth-child(1) {
    animation-delay: 0.5s;
}

.is-visible .services-grid > *:nth-child(2),
.is-visible .methodology-grid > *:nth-child(2),
.is-visible .values-grid > *:nth-child(2),
.is-visible .why-grid > *:nth-child(2),
.is-visible .faq-item:nth-child(2) {
    animation-delay: 0.6s;
}

.is-visible .services-grid > *:nth-child(3),
.is-visible .methodology-grid > *:nth-child(3),
.is-visible .values-grid > *:nth-child(3),
.is-visible .why-grid > *:nth-child(3),
.is-visible .faq-item:nth-child(3) {
    animation-delay: 0.7s;
}

.is-visible .services-grid > *:nth-child(4),
.is-visible .methodology-grid > *:nth-child(4),
.is-visible .values-grid > *:nth-child(4),
.is-visible .why-grid > *:nth-child(4),
.is-visible .faq-item:nth-child(4) {
    animation-delay: 0.8s;
}

.is-visible .services-grid > *:nth-child(5),
.is-visible .methodology-grid > *:nth-child(5),
.is-visible .values-grid > *:nth-child(5),
.is-visible .why-grid > *:nth-child(5),
.is-visible .faq-item:nth-child(5) {
    animation-delay: 0.9s;
}

.is-visible .services-grid > *:nth-child(6),
.is-visible .methodology-grid > *:nth-child(6),
.is-visible .values-grid > *:nth-child(6),
.is-visible .why-grid > *:nth-child(6),
.is-visible .faq-item:nth-child(6) {
    animation-delay: 1s;
}

/* Keyframe para fadeInUp */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   Separadores Entre Secciones
   ======================================== */

/* Línea sutil entre secciones */
section::after {
    content: '';
    display: block;
    height: 1px;
    background: linear-gradient(
        to right,
        transparent,
        rgba(255, 255, 255, 0.1) 20%,
        rgba(255, 255, 255, 0.1) 80%,
        transparent
    );
    margin-top: var(--section-padding, 4rem);
    opacity: 0.5;
}

section.hero::after,
section.contact::after {
    display: none;
}

/* ========================================
   Fondos Alternados
   ======================================== */

section:nth-of-type(even) {
    background: linear-gradient(
        180deg,
        rgba(15, 23, 42, 0.95) 0%,
        rgba(15, 23, 42, 1) 50%,
        rgba(15, 23, 42, 0.95) 100%
    );
    position: relative;
}

section:nth-of-type(odd) {
    background: linear-gradient(
        180deg,
        rgba(30, 41, 59, 0.3) 0%,
        transparent 50%,
        rgba(30, 41, 59, 0.3) 100%
    );
}

/* ========================================
   Transiciones Suaves Globales
   ======================================== */

button,
.btn,
.btn-primary,
.btn-secondary,
a.button {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

a {
    transition: color 0.2s ease, opacity 0.2s ease;
}

.service-card,
.methodology-card,
.value-card,
.why-card,
.faq-item {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========================================
   Hardware Acceleration
   ======================================== */

.service-card,
.methodology-card,
.value-card,
.why-card,
.btn-primary,
.btn-secondary {
    transform: translateZ(0);
    backface-visibility: hidden;
}

/* ========================================
   Reduced Motion (Accesibilidad)
   ======================================== */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    section {
        opacity: 1;
        transform: none;
    }
}

/* ========================================
   Responsive Animations
   ======================================== */

@media (max-width: 768px) {
    section {
        transform: translateY(30px);
    }
    
    .is-visible .section-header,
    .is-visible .section-intro,
    .is-visible .section-subtitle {
        animation-duration: 0.5s;
    }
    
    /* Reducir delays en móviles pero mantener progresión */
    .is-visible .services-grid > *:nth-child(1),
    .is-visible .methodology-grid > *:nth-child(1),
    .is-visible .values-grid > *:nth-child(1),
    .is-visible .why-grid > *:nth-child(1),
    .is-visible .faq-item:nth-child(1) {
        animation-delay: 0.2s;
    }
    
    .is-visible .services-grid > *:nth-child(2),
    .is-visible .methodology-grid > *:nth-child(2),
    .is-visible .values-grid > *:nth-child(2),
    .is-visible .why-grid > *:nth-child(2),
    .is-visible .faq-item:nth-child(2) {
        animation-delay: 0.3s;
    }
    
    .is-visible .services-grid > *:nth-child(3),
    .is-visible .methodology-grid > *:nth-child(3),
    .is-visible .values-grid > *:nth-child(3),
    .is-visible .why-grid > *:nth-child(3),
    .is-visible .faq-item:nth-child(3) {
        animation-delay: 0.4s;
    }
    
    .is-visible .services-grid > *:nth-child(4),
    .is-visible .methodology-grid > *:nth-child(4),
    .is-visible .values-grid > *:nth-child(4),
    .is-visible .why-grid > *:nth-child(4),
    .is-visible .faq-item:nth-child(4) {
        animation-delay: 0.5s;
    }
    
    .is-visible .services-grid > *:nth-child(5),
    .is-visible .methodology-grid > *:nth-child(5),
    .is-visible .values-grid > *:nth-child(5),
    .is-visible .why-grid > *:nth-child(5),
    .is-visible .faq-item:nth-child(5) {
        animation-delay: 0.6s;
    }
    
    .is-visible .services-grid > *:nth-child(6),
    .is-visible .methodology-grid > *:nth-child(6),
    .is-visible .values-grid > *:nth-child(6),
    .is-visible .why-grid > *:nth-child(6),
    .is-visible .faq-item:nth-child(6) {
        animation-delay: 0.7s;
    }
}

/* ========================================
   Selection Styling
   ======================================== */
::selection {
    background-color: var(--primary-color);
    color: var(--text-light);
}

::-moz-selection {
    background-color: var(--primary-color);
    color: var(--text-light);
}

/* ========================================
   Skip to Content (Accesibilidad)
   ======================================== */
.skip-to-content {
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--primary-color);
    color: var(--text-light);
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-md);
    font-weight: 600;
    text-decoration: none;
    z-index: 10000;
    transition: top 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.skip-to-content:focus {
    top: 1rem;
    outline: 3px solid var(--primary-light);
    outline-offset: 3px;
}

/* ========================================
   Scroll Progress Indicator
   ======================================== */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(to right, var(--primary-color), var(--primary-light));
    z-index: 9999;
    transition: width 0.1s ease-out;
    box-shadow: 0 0 10px rgba(26, 107, 194, 0.5);
}

/* ========================================
   Scroll to Top Button
   ======================================== */
.scroll-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 3rem;
    height: 3rem;
    background: linear-gradient(to bottom right, var(--primary-color), var(--primary-light));
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: scale(0.8) translateY(20px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(26, 107, 194, 0.4);
}

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

.scroll-to-top:hover {
    transform: scale(1.1) translateY(-3px);
    box-shadow: 0 8px 20px rgba(26, 107, 194, 0.6);
}

.scroll-to-top:active {
    transform: scale(0.95);
}

.scroll-to-top svg {
    color: var(--text-light);
    transition: transform 0.3s ease;
}

.scroll-to-top:hover svg {
    transform: translateY(-3px);
}

.scroll-to-top:focus {
    outline: 3px solid var(--primary-light);
    outline-offset: 3px;
}

@media (max-width: 768px) {
    .scroll-to-top {
        bottom: 1.5rem;
        right: 1.5rem;
        width: 2.5rem;
        height: 2.5rem;
    }
}

/* ========================================
   Focus Visible States (Accesibilidad WCAG 2.1)
   ======================================== */

/* Reset de outline por defecto */
*:focus {
    outline: none;
}

/* Focus visible solo con teclado */
*:focus-visible {
    outline: 3px solid var(--primary-light);
    outline-offset: 3px;
    border-radius: 4px;
}

/* ========================================
   Prevención de FOUC (Flash of Unstyled Content)
   ======================================== */
html.loading {
    overflow: hidden;
}

html.loading body {
    opacity: 0;
}

html.loaded body {
    opacity: 1;
    transition: opacity 0.3s ease-in;
}

/* ========================================
   Toast Notifications
   ======================================== */
.toast-container {
    position: fixed;
    top: 5rem;
    right: 1rem;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    pointer-events: none;
}

.toast {
    display: flex;
    align-items: center;
    gap: 1rem;
    min-width: 300px;
    max-width: 400px;
    padding: 1rem 1.25rem;
    background-color: rgba(2, 8, 20, 0.95);
    border: 1px solid rgba(26, 107, 194, 0.3);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(8px);
    opacity: 0;
    transform: translateX(400px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: all;
}

.toast.show {
    opacity: 1;
    transform: translateX(0);
}

.toast.success {
    border-left: 4px solid var(--success-color);
}

.toast.error {
    border-left: 4px solid var(--error-color);
}

.toast.info {
    border-left: 4px solid var(--info-color);
}

.toast-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 600;
    color: var(--text-light);
    margin-bottom: 0.25rem;
}

.toast-message {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.toast-close {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.25rem;
    color: var(--text-muted);
    transition: color 0.2s ease;
}

.toast-close:hover {
    color: var(--text-light);
}

@media (max-width: 768px) {
    .toast-container {
        right: 1rem;
        left: 1rem;
    }

    .toast {
        min-width: auto;
        max-width: 100%;
    }
}

/* ========================================
   Skeleton Loading States
   ======================================== */
.skeleton {
    background: linear-gradient(
        90deg,
        rgba(35, 66, 95, 0.3) 25%,
        rgba(35, 66, 95, 0.5) 50%,
        rgba(35, 66, 95, 0.3) 75%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
    border-radius: var(--border-radius-md);
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-text {
    height: 1rem;
    margin-bottom: 0.5rem;
}

.skeleton-title {
    height: 1.5rem;
    width: 60%;
    margin-bottom: 1rem;
}

.skeleton-image {
    height: 200px;
    width: 100%;
}

/* ========================================
   Prefers Reduced Motion (Accesibilidad)
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .scroll-progress {
        transition: none;
    }

    .scroll-to-top {
        transition: opacity 0.2s ease, visibility 0.2s ease;
    }
}

/* ========================================
   Optimización de Performance Visual
   ======================================== */
.hero-circle-1,
.hero-circle-2,
.about-circle,
.services-decorative,
.methodology-circle-1,
.methodology-circle-2,
.contact-circle-1,
.contact-circle-2 {
    will-change: transform;
}