/* styles.css — estilos propios de la landing de CLAM Estructuras.
   Los valores (colores, tipografía, espaciados, duraciones) vienen de design-system.css.
   El tramo entre "critical:start" y "critical:end" es el que index.html lleva además en línea en el <head>. */

/* critical:start */
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.grid { display: grid; gap: var(--space-3); }
.icon { width: 22px; height: 22px; flex: none; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 50; background: #fff; border-bottom: 1px solid var(--color-border); transition: box-shadow var(--transition-base) var(--easing-base); }
.site-header.is-scrolled { box-shadow: 0 4px 16px rgba(21, 24, 29, .08); }
.site-header .container { display: flex; align-items: center; gap: var(--space-3); height: var(--header-height); }
.logo { font-family: var(--font-primary); font-weight: 700; font-size: 1.5rem; color: var(--color-primary); text-decoration: none; letter-spacing: .04em; line-height: 1; display: inline-flex; flex-direction: column; justify-content: center; min-height: 48px; }
.logo small { display: block; font-size: .625rem; letter-spacing: .22em; font-weight: 600; }
.nav { display: none; gap: var(--space-4); margin-left: var(--space-4); }
.nav a { color: var(--color-text); text-decoration: none; font-weight: 500; padding: 12px 0; border-bottom: 2px solid transparent; transition: border-color var(--transition-base) var(--easing-base); }
@media (hover: hover) { .nav a:hover { border-color: var(--color-accent); } }
.nav a.is-clicked, .nav a.is-clicked:hover { border-color: transparent; }
.header-wa { display: none; margin-left: auto; }
.header-cta { margin-left: auto; }
.menu-toggle { width: 48px; height: 48px; border: 0; background: none; cursor: pointer; display: grid; place-items: center; }
.menu-toggle span, .menu-toggle span::before, .menu-toggle span::after { display: block; width: 22px; height: 2px; background: var(--color-primary); border-radius: 2px; position: relative; content: ""; }
.menu-toggle span::before { position: absolute; top: -7px; }
.menu-toggle span::after { position: absolute; top: 7px; }
/* Menú mobile: panel flotante bajo la hamburguesa. No ocupa espacio en la página (no la desplaza),
   aparece con fundido y tiene fondo translúcido (mejora al prototipo n.º 12) */
.mobile-nav { position: absolute; top: calc(100% + 8px); right: 16px; min-width: 220px; background: rgba(255, 255, 255, .86); -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px); border: 1px solid var(--color-border); border-radius: var(--radius-md); box-shadow: var(--shadow-floating); overflow: hidden; opacity: 0; visibility: hidden; transform: translateY(-8px); transition: opacity var(--transition-base) var(--easing-base), transform var(--transition-base) var(--easing-base), visibility 0s linear var(--transition-base); }
.mobile-nav.is-open { opacity: 1; visibility: visible; transform: none; transition-delay: 0s; }
.mobile-nav a { display: flex; align-items: center; min-height: 48px; padding: 12px 20px; color: var(--color-text); text-decoration: none; font-weight: 500; border-bottom: 1px solid rgba(21, 24, 29, .08); }
.mobile-nav a:last-child { border-bottom: 0; }
.mobile-nav a:active { background: rgba(255, 107, 0, .12); }
@media (min-width: 1000px) {
  .nav { display: flex; }
  .header-wa { display: inline-flex; }
  .header-cta { margin-left: 0; }
  .menu-toggle, .mobile-nav { display: none !important; }
}

/* Botón con borde naranja (WhatsApp) */
.btn--outline-accent { background: #fff; color: var(--color-primary); border-color: var(--color-accent); }
.btn--outline-accent .icon { color: var(--color-accent-text); }
.btn--outline-accent:hover { background: #FFF0E3; transform: translateY(-2px); }

/* Hero */
.hero { padding-top: var(--space-6); }
.hero .grid { align-items: center; }
.hero p.lead { font-size: var(--text-body-lg); color: var(--color-text-muted); max-width: 560px; }
.hero-points { list-style: none; padding: 0; margin: var(--space-3) 0; display: grid; grid-template-columns: 1fr 1fr; gap: 10px var(--space-3); max-width: 620px; }
.hero-points li { position: relative; padding-left: 26px; font-weight: 500; }
.hero-points li::before { content: ""; position: absolute; left: 0; top: .45em; width: 14px; height: 8px; border-left: 3px solid var(--color-accent); border-bottom: 3px solid var(--color-accent); transform: rotate(-45deg); }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2) var(--space-3); }
.hero .img-placeholder { aspect-ratio: 4 / 3; }
@media (min-width: 900px) {
  .hero { padding-top: 32px; padding-bottom: 36px; }
  .hero h1 { font-size: clamp(2.25rem, 1.5rem + 2vw, 3rem); }
  .hero .grid { grid-template-columns: 1.1fr .9fr; gap: var(--space-8); }
  .hero .img-placeholder { aspect-ratio: auto; height: 380px; }
  .hero-points { margin: var(--space-2) 0 var(--space-3); }
}

/* Autoridad y clientes */
.authority { padding: 32px 0 36px; }
.stats { grid-template-columns: repeat(2, 1fr); margin-bottom: var(--space-4); }
.stat strong { display: block; font-family: var(--font-primary); font-size: clamp(1.5rem, 1.2rem + 1.4vw, 2.25rem); line-height: 1.1; color: #fff; }
.stat span { color: var(--color-text-on-dark-muted); font-size: var(--text-caption); }
.authority h2 { font-size: var(--text-label); font-weight: 600; color: var(--color-highlight); text-transform: uppercase; letter-spacing: var(--tracking-label); margin-bottom: var(--space-3); }
@media (min-width: 640px) { .stats { grid-template-columns: repeat(4, 1fr); } }
.marquee { overflow: hidden; -webkit-mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent); mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent); }
.marquee-track { display: flex; width: max-content; list-style: none; margin: 0; padding: 0; animation: marquee 45s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee-item { flex: 0 0 auto; width: clamp(80px, calc((100vw - 48px) / 4), 150px); padding: 0 6px; }
.marquee-item .img-placeholder { height: 56px; background: #fff; color: var(--color-secondary); font-weight: 600; font-size: .6875rem; padding: 4px; }
@keyframes marquee { to { transform: translateX(-50%); } }
/* critical:end */

.section-head { margin-bottom: var(--space-6); }

/* Íconos en bloque (mejora al prototipo n.º 1) */
.icon-badge { width: 48px; height: 48px; border-radius: 50%; border: 2px solid var(--color-accent); display: grid; place-items: center; margin-bottom: var(--space-2); color: var(--color-accent-text); transition: transform var(--transition-base) var(--easing-base), background-color var(--transition-base) var(--easing-base); }
.icon-badge svg { width: 24px; height: 24px; }
.section--dark .icon-badge { color: var(--color-accent); }
.highlight:hover .icon-badge, .benefit:hover .icon-badge { transform: scale(1.08); background: rgba(255, 107, 0, .12); }

/* 3. Destacados */
.highlights { padding: var(--space-8) 0; }
.highlights h2 { font-size: var(--text-h3); margin-bottom: var(--space-4); }
.highlights .grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-3) var(--space-2); }
.highlight h3 { font-size: 1.0625rem; margin-bottom: 4px; }
.highlight p { margin: 0; font-size: var(--text-caption); color: var(--color-text-muted); }
@media (min-width: 900px) { .highlights .grid { grid-template-columns: repeat(5, 1fr); gap: var(--space-4); } }

/* 4. Modelos (guía de altura) */
.guide { background: var(--color-background-alt); border-radius: var(--radius-lg); padding: var(--space-3); }
.guide table { width: 100%; border-collapse: collapse; margin: var(--space-2) 0; background: #fff; border-radius: var(--radius-md); overflow: hidden; }
.guide th, .guide td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--color-border); }
.guide th { font-family: var(--font-primary); font-size: var(--text-label); text-transform: uppercase; letter-spacing: var(--tracking-label); background: #E9EBEF; }
.guide td:last-child { font-weight: 600; }
.guide .link-icon { margin-top: var(--space-1); }
@media (min-width: 900px) { .guide { display: grid; grid-template-columns: 1fr 1.4fr; gap: var(--space-6); align-items: center; padding: var(--space-4) var(--space-6); } }

/* 5. Cómo funciona */
.steps { grid-template-columns: 1fr; counter-reset: step; list-style: none; padding: 0; margin: 0; }
.steps li { counter-increment: step; padding-top: 72px; position: relative; }
.steps li::before { content: counter(step); position: absolute; top: 0; left: 0; width: 56px; height: 56px; border: 2px solid var(--color-accent); border-radius: 50%; display: grid; place-items: center; font-family: var(--font-primary); font-weight: 700; font-size: 1.5rem; color: var(--color-accent-text); background: #fff; transition: transform var(--transition-base) var(--easing-base), background-color var(--transition-base) var(--easing-base); }
/* Mismo efecto que los íconos de Destacados (mejora al prototipo n.º 11) */
.steps li:hover::before { transform: scale(1.08); background: #FFEBDD; }
.steps p { color: var(--color-text-muted); margin: 0; }
@media (min-width: 640px) { .steps { grid-template-columns: repeat(2, 1fr); gap: var(--space-4); } }
@media (min-width: 1000px) { .steps { grid-template-columns: repeat(4, 1fr); } }

/* 6. Precios */
.products { grid-template-columns: 1fr; }
@media (min-width: 640px) { .products { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1100px) { .products { grid-template-columns: repeat(4, 1fr); } }
.card--product { display: flex; flex-direction: column; padding: var(--space-2); }
.card--product .img-placeholder { aspect-ratio: 4 / 3; margin-bottom: var(--space-2); background: var(--color-background-alt); border: 1px dashed var(--color-border-strong); }
.card--product .badge { align-self: flex-start; }
.card--product h3 { margin: 10px 0 6px; }
.card--product p { font-size: .9375rem; color: var(--color-text-muted); }
.price { font-family: var(--font-primary); font-weight: 700; font-size: 1.625rem; color: var(--color-primary); margin: auto 0 var(--space-2); padding-top: var(--space-1); }
.card--product p.price { font-size: 1.625rem; color: var(--color-primary); }
.price small { font-family: var(--font-secondary); font-size: var(--text-caption); font-weight: 500; color: var(--color-text-muted); }
.price-label { font-size: var(--text-label); text-transform: uppercase; letter-spacing: var(--tracking-label); color: var(--color-text-muted); display: block; font-family: var(--font-secondary); font-weight: 600; }

/* Carrusel, solo en celulares (mejoras al prototipo n.º 2 y 10): secciones Precios y Usos por industria: una tarjeta a la vez, con flechas laterales */
.carousel { position: relative; }
.carousel-arrow, .carousel-status { display: none; }
@media (max-width: 639px) {
  .carousel .carousel-track { display: flex; gap: var(--space-2); overflow-x: auto; scroll-snap-type: x mandatory; scroll-behavior: smooth; overscroll-behavior-x: contain; scrollbar-width: none; padding: 8px 0 var(--space-2); }
  .carousel .carousel-track::-webkit-scrollbar { display: none; }
  .carousel .carousel-track > .card { flex: 0 0 100%; scroll-snap-align: center; scroll-snap-stop: always; }
  .carousel .carousel-track > .card.reveal { opacity: 1; transform: none; }
  .carousel .card--product:hover, .carousel .card--product:focus-within { transform: none; }
  .carousel-arrow { display: grid; place-items: center; position: absolute; top: 132px; z-index: 2; width: 48px; height: 48px; padding: 0; border-radius: 50%; border: 2px solid var(--color-accent); background: #fff; color: var(--color-primary); box-shadow: var(--shadow-floating); cursor: pointer; transition: background-color var(--transition-base) var(--easing-base), opacity var(--transition-base) var(--easing-base), transform var(--transition-base) var(--easing-base); }
  .carousel-arrow svg { width: 24px; height: 24px; }
  .carousel--industries .carousel-arrow { top: 96px; }
  .carousel-arrow--prev { left: -14px; }
  .carousel-arrow--next { right: -14px; }
  .carousel-arrow:active { transform: scale(.94); background: #FFF0E3; }
  .carousel-arrow:disabled { opacity: .35; border-color: var(--color-border-strong); box-shadow: none; cursor: default; }
  .carousel-status { display: block; text-align: center; margin: 0; font-family: var(--font-primary); font-weight: 600; font-size: var(--text-caption); color: var(--color-text-muted); }
}
@media (max-width: 639px) and (prefers-reduced-motion: reduce) { .carousel .carousel-track { scroll-behavior: auto; } }

/* Desplegables (especificaciones y preguntas): <details> nativo, con altura animada por main.js */
details summary { cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; gap: var(--space-2); min-height: 48px; font-weight: 600; }
details summary::-webkit-details-marker { display: none; }
details summary::after { content: "+"; flex: none; font-family: var(--font-primary); font-size: 1.5rem; line-height: 1; color: var(--color-accent-text); transition: transform 300ms var(--easing-base); }
details.is-open summary::after { transform: rotate(45deg); }
details .panel { overflow: hidden; }
details.specs { margin-top: var(--space-2); border-top: 1px solid var(--color-border); }
details.specs summary { padding: 14px 0; }
details.specs ul { margin: 0 0 var(--space-2); padding-left: 18px; font-size: var(--text-caption); color: var(--color-text-muted); }

/* 7. Por qué comprar al fabricante */
.feature { background: #1E232B; border: 1px solid #2C333D; border-left: 4px solid var(--color-accent); border-radius: var(--radius-lg); padding: var(--space-4); }
.feature p { color: var(--color-text-on-dark-muted); margin: 0; }
.benefits { grid-template-columns: 1fr; margin: var(--space-4) 0 var(--space-6); }
.benefit { padding: var(--space-3); border: 1px solid #2C333D; border-radius: var(--radius-lg); transition: border-color var(--transition-base) var(--easing-base), transform var(--transition-base) var(--easing-base); }
.benefit:hover { border-color: var(--color-accent); transform: translateY(-3px); }
.benefit p { color: var(--color-text-on-dark-muted); margin: 0; font-size: .9375rem; }
@media (min-width: 640px) { .benefits { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1100px) { .benefits { grid-template-columns: repeat(5, 1fr); } }

/* 8. Fabricación a medida */
.custom { padding: var(--space-8) 0; }
.custom-band { max-width: 980px; margin: 0 auto; background: var(--color-background-alt); border-radius: var(--radius-lg); padding: var(--space-4); }
.custom-band h2 { font-size: clamp(1.375rem, 1.2rem + .8vw, 1.75rem); margin-bottom: 8px; }
.custom-band .intro p { margin: 0; color: var(--color-text-muted); }
.custom-top { display: grid; gap: var(--space-3); align-items: center; }
.sizes { display: flex; flex-wrap: wrap; gap: 10px; margin: 0 0 var(--space-2); padding: 0; list-style: none; }
.sizes li { font-family: var(--font-primary); font-weight: 700; font-size: 1rem; padding: 6px 14px; border: 2px solid var(--color-primary); border-radius: var(--radius-pill); background: #fff; }
.custom-acc { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-3); margin-top: var(--space-3); padding-top: var(--space-3); border-top: 1px solid var(--color-border); }
.custom-acc h3 { font-size: 1rem; margin-bottom: 2px; }
.custom-acc p { margin: 0; font-size: var(--text-caption); color: var(--color-text-muted); }
@media (min-width: 900px) { .custom-top { grid-template-columns: 1.3fr 1fr; gap: var(--space-6); } .custom-acc { grid-template-columns: repeat(4, 1fr); } }

/* 9. Usos por industria */
.industries { grid-template-columns: 1fr; }
.industries .card { padding: 0; overflow: hidden; }
.industries .img-placeholder { aspect-ratio: 3 / 2; border-radius: 0; }
.industries .card .body { padding: var(--space-3); }
.industries .card p { margin: 0; color: var(--color-text-muted); font-size: .9375rem; }
@media (min-width: 640px) { .industries { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1100px) { .industries { grid-template-columns: repeat(3, 1fr); } }

/* 10. Preguntas frecuentes */
/* Dos columnas que comparten filas: cada pregunta y su línea quedan a la altura de la de al lado.
   Se llenan por columna (6 a la izquierda, 5 a la derecha) para conservar el orden de lectura. */
.faq { display: grid; grid-template-columns: 1fr; gap: 0 var(--space-6); }
@media (min-width: 900px) { .faq { grid-template-columns: 1fr 1fr; grid-template-rows: repeat(6, auto); grid-auto-flow: column; } }
.faq details { border-bottom: 1px solid var(--color-border); }
.faq summary { padding: 18px 0; }
.faq summary h3 { margin: 0; }
.faq details p { margin: 0; padding-bottom: 18px; color: var(--color-text-muted); }

/* 11. Cotización */
.quote .grid { align-items: start; }
.form-card { padding: var(--space-3); }
.progress { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; margin-bottom: var(--space-1); }
.progress span { height: 6px; border-radius: 3px; background: var(--color-border); transition: background-color var(--transition-base) var(--easing-base); }
.progress span.is-on { background: var(--color-accent); }
.step-label { font-family: var(--font-primary); font-weight: 600; margin-bottom: var(--space-3); }
.form-step { display: none; border: 0; padding: 0; margin: 0; min-width: 0; animation: fade var(--transition-base) var(--easing-base); }
.form-step.is-active { display: block; }
@keyframes fade { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
.row-2 { display: grid; grid-template-columns: 1fr 120px; gap: var(--space-2); }
.form-actions { display: flex; gap: var(--space-2); flex-wrap: wrap; }
.form-actions .btn--primary { flex: 1; }
.form-note { font-size: var(--text-caption); color: var(--color-text-muted); margin: var(--space-2) 0 0; }
.form-success { display: none; padding: var(--space-3); border: 2px solid var(--color-success); border-radius: var(--radius-md); font-weight: 500; }
.form-success.is-visible { display: block; }
.form-error { display: none; margin-top: var(--space-2); padding: var(--space-2); border: 2px solid var(--color-error); border-radius: var(--radius-md); color: var(--color-error); font-weight: 500; }
.form-error.is-visible { display: block; }
.form-error a { color: inherit; }
.hp-field { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
#field-product.flash select { box-shadow: 0 0 0 4px rgba(255, 107, 0, .45); border-color: var(--color-accent); }
.btn.is-loading { opacity: .7; pointer-events: none; }
.contact-card { padding: var(--space-4); background: #fff; border: 1px solid var(--color-border); box-shadow: none; }
.contact-card .btn { margin-bottom: var(--space-2); flex-wrap: wrap; text-align: center; }
.nowrap { white-space: nowrap; }
@media (min-width: 900px) { .quote > .container > .grid { grid-template-columns: 1.3fr .7fr; gap: var(--space-6); } .form-card { padding: var(--space-6); } }

/* Footer */
.site-footer { background: var(--color-background-dark); color: var(--color-text-on-dark-muted); padding: var(--space-8) 0 var(--space-12); }
.site-footer .grid { grid-template-columns: 1fr; gap: var(--space-4); }
.site-footer .logo { color: #fff; }
.site-footer .tagline { margin-top: 16px; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer .footer-title { font-family: var(--font-primary); font-weight: 600; color: #fff; font-size: var(--text-label); text-transform: uppercase; letter-spacing: var(--tracking-label); margin-bottom: var(--space-2); }
.contact-list li { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; color: #fff; }
.contact-list a { color: #fff; text-decoration: none; transition: color var(--transition-base) var(--easing-base); }
.contact-list a:hover { color: var(--color-accent); }
.contact-list .icon { width: 20px; height: 20px; color: var(--color-accent); }
.site-footer .legal { border-top: 1px solid #2C333D; margin-top: var(--space-4); padding-top: var(--space-3); font-size: var(--text-caption); display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2) var(--space-4); }
.site-footer .legal a { color: #fff; text-decoration: none; }
.site-footer .legal a:hover { text-decoration: underline; }
@media (min-width: 900px) { .site-footer .grid { grid-template-columns: 1.2fr 1fr 1fr; } }
@media (max-width: 899px) {
  .contact-list li { margin-bottom: 0; }
  .contact-list a, .site-footer .legal a, .form-note a { display: inline-flex; align-items: center; min-height: 48px; }
}

/* WhatsApp flotante */
.wa-float { position: fixed; right: 20px; bottom: 20px; z-index: 60; width: 60px; height: 60px; border-radius: 50%; background: var(--color-accent); color: var(--color-primary); display: grid; place-items: center; box-shadow: var(--shadow-floating); transition: transform var(--transition-base) var(--easing-base), background-color var(--transition-base) var(--easing-base); }
.wa-float:hover { transform: scale(1.08); background: var(--color-accent-hover); }
.wa-float svg { width: 30px; height: 30px; }

/* Página de política de privacidad */
.legal-page { max-width: 760px; }
.legal-page h1 { font-size: var(--text-h2); }
.legal-page h2 { font-size: var(--text-h3); margin-top: var(--space-4); }
.back-link { display: inline-flex; align-items: center; min-height: 48px; font-weight: 600; }

@media (prefers-reduced-motion: reduce) {
  .marquee { overflow-x: auto; -webkit-mask-image: none; mask-image: none; }
  .marquee-track { animation: none; }
}