/* ==========================================
   SIMPLIUM.IO - CSS OPTIMIZADO PARA CORE WEB VITALS
   ========================================== */

/* === VARIABLES CSS === */
:root {
    /* Colores principales */
    --color-primary: #0066FF;
    --color-primary-dark: #0052CC;
    --color-primary-light: #3385FF;
    --color-secondary: #00D9FF;
    --color-accent: #FF6B35;

    /* Grises */
    --color-dark: #1A1A1A;
    --color-gray-900: #2D2D2D;
    --color-gray-800: #404040;
    --color-gray-600: #666666;
    --color-gray-400: #999999;
    --color-gray-200: #E5E5E5;
    --color-gray-100: #F5F5F5;
    --color-white: #FFFFFF;

    /* Tipografía */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --font-size-base: 16px;
    --font-size-small: 14px;
    --font-size-large: 18px;
    --font-size-h1: clamp(2.5rem, 5vw, 4rem);
    --font-size-h2: clamp(2rem, 4vw, 3rem);
    --font-size-h3: clamp(1.5rem, 3vw, 2rem);
    --font-size-h4: 1.25rem;

    /* Espaciado */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;

    /* Layout */
    --container-max: 1200px;
    --container-padding: 1.5rem;
    --border-radius: 8px;
    --border-radius-lg: 16px;

    /* Sombras */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);

    /* Transiciones */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

/* === RESET Y BASE === */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--color-dark);
    background-color: var(--color-white);
    overflow-x: hidden;
}

/* Mejora CLS (Cumulative Layout Shift) */
img, video, iframe {
    max-width: 100%;
    height: auto;
    display: block;
}

/* === TIPOGRAFÍA === */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--color-dark);
}

h1 { font-size: var(--font-size-h1); }
h2 { font-size: var(--font-size-h2); }
h3 { font-size: var(--font-size-h3); }
h4 { font-size: var(--font-size-h4); }

p {
    margin-bottom: var(--spacing-sm);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-dark);
}

a:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
    border-radius: 4px;
}

/* === LAYOUT === */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* === HEADER Y NAVEGACIÓN === */
.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-gray-200);
    /* Optimización CLS - altura fija */
    height: 80px;
}

.nav {
    height: 100%;
}

.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    /* Evita CLS */
    min-width: 140px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    list-style: none;
}

.nav-menu a {
    font-weight: 500;
    color: var(--color-gray-800);
    transition: color var(--transition-fast);
}

.nav-menu a:hover {
    color: var(--color-primary);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.hamburger {
    display: block;
    width: 28px;
    height: 2px;
    background: var(--color-dark);
    position: relative;
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 28px;
    height: 2px;
    background: var(--color-dark);
    left: 0;
    transition: transform var(--transition-base);
}

.hamburger::before { top: -8px; }
.hamburger::after { top: 8px; }

/* === BOTONES === */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-size: var(--font-size-base);
    font-weight: 600;
    text-align: center;
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

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

.btn-large {
    padding: 1rem 2rem;
    font-size: var(--font-size-large);
}

.btn-block {
    display: block;
    width: 100%;
}

/* === HERO SECTION === */
.hero {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, #F0F7FF 0%, #FFFFFF 100%);
    /* Optimización LCP - min-height previene CLS */
    min-height: calc(100vh - 80px);
    display: flex;
    align-items: center;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.hero-title {
    margin-bottom: var(--spacing-md);
}

.hero-title .highlight {
    color: var(--color-primary);
    position: relative;
}

.hero-title .highlight::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--color-secondary);
    opacity: 0.3;
}

.hero-subtitle {
    font-size: var(--font-size-large);
    color: var(--color-gray-800);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-gray-200);
}

.stat {
    text-align: center;
}

.stat strong {
    display: block;
    font-size: 1.75rem;
    color: var(--color-primary);
    font-weight: 700;
}

.stat span {
    display: block;
    font-size: var(--font-size-small);
    color: var(--color-gray-600);
    margin-top: var(--spacing-xs);
}

.hero-visual {
    /* Reserva espacio para evitar CLS */
    aspect-ratio: 16 / 9;
}

.video-wrapper {
    position: relative;
    width: 100%;
    height: 100%;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.video-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    cursor: pointer;
    transition: transform var(--transition-base);
}

.video-placeholder:hover {
    transform: scale(1.02);
}

.video-placeholder p {
    margin-top: var(--spacing-md);
    font-weight: 600;
}

/* === TRUST SECTION === */
.trust-section {
    padding: var(--spacing-2xl) 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-gray-200);
}

.trust-text {
    text-align: center;
    color: var(--color-gray-600);
    font-size: var(--font-size-small);
    margin-bottom: var(--spacing-md);
}

.trust-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
}

.trust-logo {
    font-weight: 600;
    color: var(--color-gray-400);
    font-size: var(--font-size-large);
    opacity: 0.7;
    transition: opacity var(--transition-fast);
}

.trust-logo:hover {
    opacity: 1;
}

/* === SECTION HEADERS === */
.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-2xl);
}

.section-header h2 {
    margin-bottom: var(--spacing-md);
}

.section-header p {
    font-size: var(--font-size-large);
    color: var(--color-gray-600);
}

/* === SERVICES SECTION === */
.services-section {
    padding: var(--spacing-3xl) 0;
    background: var(--color-white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.service-card {
    padding: var(--spacing-xl);
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--border-radius-lg);
    transition: all var(--transition-base);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.service-card h3 {
    margin-bottom: var(--spacing-md);
}

.service-card p {
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-md);
}

.service-features {
    list-style: none;
}

.service-features li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-gray-700);
    font-size: var(--font-size-small);
}

.service-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: 700;
}

/* === USE CASES SECTION === */
.use-cases-section {
    padding: var(--spacing-3xl) 0;
    background: var(--color-gray-100);
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.use-case {
    padding: var(--spacing-lg);
    background: var(--color-white);
    border-radius: var(--border-radius);
    transition: transform var(--transition-base);
}

.use-case:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.use-case h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.use-case p {
    color: var(--color-gray-600);
    font-size: var(--font-size-small);
    margin-bottom: var(--spacing-md);
}

.use-case-result {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(0, 102, 255, 0.1);
    color: var(--color-primary);
    font-weight: 600;
    font-size: var(--font-size-small);
    border-radius: var(--border-radius);
}

/* === CALCULATOR SECTION === */
.calculator-section {
    padding: var(--spacing-3xl) 0;
    background: var(--color-white);
}

.calculator {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    max-width: 1000px;
    margin: 0 auto;
}

.calculator-inputs,
.calculator-results {
    padding: var(--spacing-xl);
    background: var(--color-gray-100);
    border-radius: var(--border-radius-lg);
}

.input-group {
    margin-bottom: var(--spacing-lg);
}

.input-group label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-dark);
}

.tooltip {
    cursor: help;
    margin-left: var(--spacing-xs);
}

.input-group input,
.input-group select {
    width: 100%;
    padding: 0.75rem;
    font-size: var(--font-size-base);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--border-radius);
    transition: border-color var(--transition-fast);
    font-family: var(--font-primary);
}

.input-group input:focus,
.input-group select:focus {
    outline: none;
    border-color: var(--color-primary);
}

.input-group small {
    display: block;
    margin-top: var(--spacing-xs);
    color: var(--color-gray-600);
    font-size: 0.875rem;
}

.calculator-results h3 {
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.result-card {
    padding: var(--spacing-md);
    background: var(--color-white);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.result-label {
    font-size: var(--font-size-small);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-xs);
}

.result-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-dark);
}

.result-value.highlight {
    color: var(--color-primary);
}

.result-card.savings {
    background: rgba(0, 217, 255, 0.1);
}

.result-card.savings .result-value {
    color: var(--color-secondary);
}

.result-card.savings-big {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: var(--color-white);
    padding: var(--spacing-lg);
}

.result-card.savings-big .result-label {
    color: rgba(255, 255, 255, 0.9);
}

.result-value-big {
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-white);
}

.result-details {
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-md);
    background: rgba(0, 102, 255, 0.05);
    border-radius: var(--border-radius);
}

.result-details p {
    margin-bottom: var(--spacing-xs);
    font-size: var(--font-size-small);
}

/* === BENEFITS SECTION === */
.benefits-section {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
    color: var(--color-white);
}

.benefits-section .section-header h2,
.benefits-section .section-header p {
    color: var(--color-white);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.benefit {
    padding: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius-lg);
    transition: all var(--transition-base);
}

.benefit:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-4px);
}

.benefit-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-sm);
    line-height: 1;
}

.benefit h3 {
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
}

.benefit p {
    color: rgba(255, 255, 255, 0.9);
    font-size: var(--font-size-small);
}

/* === FAQ SECTION === */
.faq-section {
    padding: var(--spacing-3xl) 0;
    background: var(--color-white);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: var(--spacing-md);
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.faq-item summary {
    padding: var(--spacing-lg);
    font-weight: 600;
    cursor: pointer;
    user-select: none;
    transition: background var(--transition-fast);
    list-style: none;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: '+';
    float: right;
    font-size: 1.5rem;
    font-weight: 300;
    transition: transform var(--transition-base);
}

.faq-item[open] summary::after {
    transform: rotate(45deg);
}

.faq-item summary:hover {
    background: var(--color-gray-100);
}

.faq-answer {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--color-gray-600);
}

/* === CTA SECTION === */
.cta-section {
    padding: var(--spacing-3xl) 0;
    background: var(--color-gray-100);
}

.cta-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.cta-content h2 {
    margin-bottom: var(--spacing-md);
}

.cta-content > p {
    font-size: var(--font-size-large);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-xl);
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.cta-note {
    color: var(--color-gray-600);
    font-size: var(--font-size-small);
}

/* === CONTACT SECTION === */
.contact-section {
    padding: var(--spacing-3xl) 0;
    background: var(--color-white);
}

.contact-form {
    max-width: 700px;
    margin: 0 auto;
    padding: var(--spacing-xl);
    background: var(--color-gray-100);
    border-radius: var(--border-radius-lg);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-dark);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    font-size: var(--font-size-base);
    font-family: var(--font-primary);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--border-radius);
    background: var(--color-white);
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.checkbox-group {
    display: flex;
    align-items: flex-start;
}

.checkbox-group label {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    font-weight: 400;
    cursor: pointer;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    margin-top: 0.25rem;
    cursor: pointer;
}

.form-note {
    text-align: center;
    color: var(--color-gray-600);
    font-size: var(--font-size-small);
    margin-top: var(--spacing-md);
}

/* === FOOTER === */
.footer {
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
    background: var(--color-dark);
    color: rgba(255, 255, 255, 0.8);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-col h3,
.footer-col h4 {
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
}

.footer-col p {
    font-size: var(--font-size-small);
    margin-bottom: var(--spacing-md);
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-col a {
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition-fast);
}

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

.social-links {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.social-links a:hover {
    background: var(--color-primary);
    transform: translateY(-2px);
}

.footer-bottom {
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-bottom p {
    font-size: var(--font-size-small);
    color: rgba(255, 255, 255, 0.6);
}

/* ==========================================
   RESPONSIVE DESIGN
   ========================================== */

@media (max-width: 768px) {
    /* Header responsive */
    .nav-toggle {
        display: block;
    }

    .nav-menu {
        position: absolute;
        top: 80px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--color-white);
        padding: var(--spacing-lg);
        box-shadow: var(--shadow-lg);
        display: none;
    }

    .nav-menu[aria-expanded="true"] {
        display: flex;
    }

    /* Hero responsive */
    .hero .container {
        grid-template-columns: 1fr;
    }

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

    .hero-cta {
        flex-direction: column;
    }

    .hero-cta .btn {
        width: 100%;
    }

    /* Calculator responsive */
    .calculator {
        grid-template-columns: 1fr;
    }

    /* Form responsive */
    .form-row {
        grid-template-columns: 1fr;
    }

    /* Footer responsive */
    .footer-grid {
        grid-template-columns: 1fr;
    }

    /* Stats */
    .stat strong {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    :root {
        --container-padding: 1rem;
        --spacing-3xl: 3rem;
    }

    .hero-stats {
        grid-template-columns: 1fr;
    }

    .services-grid,
    .use-cases-grid,
    .benefits-grid {
        grid-template-columns: 1fr;
    }
}

/* ==========================================
   OPTIMIZACIONES DE RENDIMIENTO
   ========================================== */

/* Reducir repaints y reflows */
.btn,
.service-card,
.use-case,
.benefit {
    will-change: transform;
}

/* Mejorar rendering de fuentes */
@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;
    }
}

/* Print styles */
@media print {
    .header,
    .nav,
    .cta-section,
    .contact-section,
    .footer {
        display: none;
    }
}

/* ==========================================
   VIEW TRANSITIONS API (2025)
   ========================================== */

/* Personalizar las transiciones entre vistas */
@view-transition {
    navigation: auto;
}

/* Transición de salida (elemento viejo) */
::view-transition-old(root) {
    animation: fade-out 0.3s cubic-bezier(0.4, 0, 1, 1);
}

/* Transición de entrada (elemento nuevo) */
::view-transition-new(root) {
    animation: fade-in 0.4s cubic-bezier(0, 0, 0.2, 1);
}

/* Animaciones personalizadas */
@keyframes fade-out {
    from {
        opacity: 1;
        transform: scale(1);
    }
    to {
        opacity: 0;
        transform: scale(0.98);
    }
}

@keyframes fade-in {
    from {
        opacity: 0;
        transform: scale(1.02);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Transición especial para secciones específicas */
::view-transition-old(hero),
::view-transition-new(hero) {
    animation-duration: 0.5s;
}

/* Transición más rápida para elementos pequeños */
::view-transition-old(nav),
::view-transition-new(nav) {
    animation-duration: 0.2s;
}

/* ==========================================
   CONTAINER QUERIES (2025)
   ========================================== */

/* Convertir grids principales en containers */
.services-grid {
    container-type: inline-size;
    container-name: services;
}

.use-cases-grid {
    container-type: inline-size;
    container-name: use-cases;
}

.benefits-grid {
    container-type: inline-size;
    container-name: benefits;
}

.calculator {
    container-type: inline-size;
    container-name: calculator;
}

/* Service cards responsive por contenedor */
@container services (max-width: 400px) {
    .service-card {
        padding: var(--spacing-md);
    }

    .service-icon {
        font-size: 2rem;
    }

    .service-features {
        font-size: 0.8rem;
    }
}

@container services (min-width: 800px) {
    .service-card {
        padding: var(--spacing-xl);
    }

    .service-card h3 {
        font-size: 1.5rem;
    }
}

/* Calculadora adaptable */
@container calculator (max-width: 500px) {
    .calculator {
        grid-template-columns: 1fr;
    }

    .calculator-inputs,
    .calculator-results {
        padding: var(--spacing-md);
    }

    .result-value {
        font-size: 1.5rem;
    }

    .result-value-big {
        font-size: 2rem;
    }
}

@container calculator (min-width: 800px) {
    .calculator {
        gap: var(--spacing-3xl);
    }

    .result-value {
        font-size: 2.5rem;
    }
}

/* Use cases adaptables */
@container use-cases (max-width: 350px) {
    .use-case {
        padding: var(--spacing-md);
    }

    .use-case h3 {
        font-size: 1rem;
    }
}

/* ==========================================
   :has() SELECTOR (2025)
   ========================================== */

/* Formulario con errores */
.contact-form:has(.error) {
    border: 2px solid #FF6B35;
    background: rgba(255, 107, 53, 0.05);
}

.contact-form:has(.error) button[type="submit"] {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Form group con input válido */
.form-group:has(input:valid:not(:placeholder-shown)) label {
    color: var(--color-primary);
    font-weight: 600;
}

/* Mostrar checkmark en inputs válidos */
.form-group:has(input:valid:not(:placeholder-shown))::after {
    content: '✓';
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: #00C853;
    font-weight: 700;
    font-size: 1.25rem;
}

.form-group {
    position: relative;
}

/* Service card con CTA destacada */
.service-card:has(.btn) {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
}

/* FAQ item abierto */
.faq-item:has(summary[open]) {
    background: var(--color-gray-100);
    border-color: var(--color-primary);
}

/* Calculadora con valores ingresados */
.calculator:has(input:not(:placeholder-shown)) {
    border: 2px solid var(--color-primary);
}

.calculator:has(input:not(:placeholder-shown)) .calculator-results {
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.05), rgba(0, 217, 255, 0.05));
}

/* Header cuando hay navegación activa */
.nav:has(a:target) {
    background: rgba(255, 255, 255, 1);
}

/* Section en viewport (para highlight en nav) */
.hero:has(:target) {
    scroll-margin-top: 100px;
}

/* ==========================================
   UTILIDADES
   ========================================== */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}