/* ==========================================================================
   METALES TREVISO S.R.L. — hoja de estilos única
   Minimalismo industrial. Sin frameworks, sin dependencias.
   ========================================================================== */

/* --- 1. Tokens ----------------------------------------------------------- */
:root {
  --ink:        #0C1826;
  --ink-soft:   #34465a;
  --ink-mute:   #6b7d90;
  --paper:      #F6F5F2;
  --paper-warm: #EDEAE4;
  --line:       rgba(12, 24, 38, .14);
  --line-soft:  rgba(12, 24, 38, .07);
  --accent:     #D9481C;
  --accent-dim: #b83c17;
  --blue:       #1266B2;
  --white:      #ffffff;

  --font-display: "Archivo", "Helvetica Neue", sans-serif;
  --font-body:    "Instrument Sans", "Helvetica Neue", sans-serif;
  --font-mono:    "IBM Plex Mono", ui-monospace, monospace;

  --wrap:    1240px;
  --gutter:  clamp(1.25rem, 5vw, 4.5rem);
  --section: clamp(4.5rem, 11vw, 9.5rem);

  --ease: cubic-bezier(.22, .61, .36, 1);
  --header-h: 68px;
}

/* --- 2. Reset ------------------------------------------------------------ */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: clamp(1rem, .95rem + .25vw, 1.125rem);
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; color: inherit; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

::selection { background: var(--accent); color: var(--white); }

/* --- 3. Tipografía ------------------------------------------------------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: .98;
  letter-spacing: -.025em;
  text-wrap: balance;
}

.display {
  font-size: clamp(2.6rem, 1.4rem + 6.2vw, 6.4rem);
  font-weight: 900;
  letter-spacing: -.04em;
  text-transform: uppercase;
}

.h2 { font-size: clamp(1.9rem, 1.2rem + 3.1vw, 3.6rem); text-transform: uppercase; }
.h3 { font-size: clamp(1.25rem, 1.05rem + .8vw, 1.6rem); letter-spacing: -.015em; }

.lead {
  font-size: clamp(1.075rem, 1rem + .55vw, 1.4rem);
  line-height: 1.5;
  color: var(--ink-soft);
  text-wrap: pretty;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 500;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: .8rem;
}
.eyebrow::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
  max-width: 8rem;
}

.muted { color: var(--ink-mute); }

/* --- 4. Estructura ------------------------------------------------------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

section { padding-block: var(--section); }

.section-head {
  display: grid;
  gap: 1.5rem;
  max-width: 62ch;
  margin-bottom: clamp(2.5rem, 5vw, 4.5rem);
}

.rule { height: 1px; background: var(--line); border: 0; }

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 200;
  background: var(--ink);
  color: var(--white);
  padding: .7rem 1.2rem;
  transition: top .2s var(--ease);
}
.skip-link:focus-visible { top: 1rem; }

/* Grano sutil que unifica las fotos de planta con la interfaz */
.grain::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .5;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.82' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.42'/%3E%3C/svg%3E");
}

/* --- 5. Cabecera --------------------------------------------------------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: rgba(246, 245, 242, .82);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s var(--ease), background .3s var(--ease);
}
.site-header.is-stuck { border-bottom-color: var(--line); }

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand { display: flex; align-items: center; gap: .7rem; }
.brand img { width: 34px; height: 34px; border-radius: 50%; }
.brand-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: .95rem;
  letter-spacing: -.01em;
  text-transform: uppercase;
  line-height: 1.05;
}
.brand-name span {
  display: block;
  font-family: var(--font-mono);
  font-size: .58rem;
  font-weight: 400;
  letter-spacing: .18em;
  color: var(--ink-mute);
}

.nav { display: flex; align-items: center; gap: clamp(1rem, 2.4vw, 2.2rem); }

.nav a {
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  padding-block: .3rem;
  position: relative;
  transition: color .2s var(--ease);
}
.nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s var(--ease);
}
.nav a:hover { color: var(--ink); }
.nav a:hover::after,
.nav a.is-active::after { transform: scaleX(1); }
.nav a.is-active { color: var(--ink); }

/* Barra de progreso de lectura */
.progress {
  position: absolute;
  left: 0; bottom: -1px;
  height: 2px;
  width: 100%;
  transform: scaleX(0);
  transform-origin: left;
  background: var(--accent);
}

/* Botón hamburguesa */
.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  background: none;
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 0;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}
.nav-toggle span {
  display: block;
  width: 18px; height: 1.5px;
  background: var(--ink);
  position: relative;
  transition: background .2s var(--ease);
}
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px; height: 1.5px;
  background: var(--ink);
  transition: transform .3s var(--ease);
}
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after  { top: 6px; }
.nav-toggle[aria-expanded="true"] span { background: transparent; }
.nav-toggle[aria-expanded="true"] span::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::after  { transform: translateY(-6px) rotate(-45deg); }

/* --- 6. Botones ---------------------------------------------------------- */
.btn {
  --btn-bg: var(--ink);
  --btn-fg: var(--paper);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .7rem;
  padding: .95rem 1.7rem;
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-family: var(--font-mono);
  font-size: .78rem;
  font-weight: 500;
  letter-spacing: .12em;
  text-transform: uppercase;
  border: 1px solid var(--btn-bg);
  border-radius: 2px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease);
}
.btn > * { position: relative; z-index: 1; }
.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--accent);
  transform: translateY(101%);
  transition: transform .35s var(--ease);
}
.btn:hover::before { transform: translateY(0); }
.btn:hover { transform: translateY(-2px); box-shadow: 0 10px 24px -12px rgba(12, 24, 38, .5); }
.btn:active { transform: translateY(0); }
.btn[disabled] { opacity: .55; pointer-events: none; }

.btn--ghost { --btn-bg: transparent; --btn-fg: var(--ink); border-color: var(--line); }
.btn--ghost:hover { --btn-fg: var(--white); }
/* Variante de contorno sobre fondos oscuros */
.btn--ghost-light { --btn-bg: transparent; --btn-fg: var(--paper); border-color: rgba(246, 245, 242, .3); }
.btn--light { --btn-bg: var(--paper); --btn-fg: var(--ink); }
.btn--light:hover { --btn-fg: var(--white); }
.btn--full { width: 100%; }

.arrow { transition: transform .3s var(--ease); }
.btn:hover .arrow { transform: translateX(4px); }

/* --- 7. Hero ------------------------------------------------------------- */
.hero {
  position: relative;
  min-height: min(94svh, 900px);
  display: flex;
  align-items: flex-end;
  padding-block: calc(var(--header-h) + 5rem) clamp(2.5rem, 5vw, 4rem);
  background: var(--ink);
  color: var(--paper);
  overflow: hidden;
}
.hero__media {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero__media picture { display: block; width: 100%; height: 100%; }

/* Movimiento de la portada mientras no hay video: acercamiento lento sobre la
   foto del horno. No agrega ni un byte, porque la foto ya estaba cargada.
   Si se sube un video a video/, la clase .has-video lo detiene. */
.hero__media picture img {
  animation: acercar 24s ease-in-out infinite alternate;
  transform-origin: 58% 45%;
  will-change: transform;
}
.hero__media.has-video picture img { animation: none; }

@keyframes acercar {
  from { transform: scale(1);    }
  to   { transform: scale(1.12); }
}

/* Video ambiental: aparece por encima de la foto recién cuando puede reproducirse,
   así nunca se ve un rectángulo negro mientras carga. */
.hero__video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 42%;
  filter: saturate(.85) contrast(1.05);
  opacity: 0;
  transition: opacity 1.2s var(--ease);
}
.hero__video.is-playing { opacity: 1; }

/* Control de pausa: la norma de accesibilidad pide poder detener
   cualquier movimiento automático que dure más de cinco segundos. */
.video-toggle {
  /* Arriba a la derecha: abajo a la izquierda pisaba el botón "Pedir cotización". */
  position: absolute;
  right: var(--gutter);
  top: calc(var(--header-h) + 1.25rem);
  z-index: 3;
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  padding: .55rem .9rem .55rem .75rem;
  background: rgba(12, 24, 38, .5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(246, 245, 242, .25);
  border-radius: 999px;
  color: rgba(246, 245, 242, .85);
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease);
}
/* Sin esto el botón se vería aunque tenga el atributo hidden: el display de
   arriba le gana al display:none que el navegador aplica por defecto. */
.video-toggle[hidden] { display: none; }
.video-toggle:hover { background: rgba(12, 24, 38, .75); color: var(--paper); border-color: rgba(246, 245, 242, .45); }

/* Dos barras (pausa) que pasan a triángulo (reproducir) al activarse */
.video-toggle__icon {
  width: 9px; height: 10px;
  flex: none;
  background: currentColor;
  clip-path: polygon(0 0, 35% 0, 35% 100%, 0 100%, 0 0, 65% 0, 100% 0, 100% 100%, 65% 100%, 65% 0);
}
.video-toggle[aria-pressed="true"] .video-toggle__icon {
  clip-path: polygon(0 0, 100% 50%, 0 100%);
}

@media (max-width: 760px) {
  .video-toggle { top: calc(var(--header-h) + 1rem); padding: .6rem; }
  .video-toggle__label { display: none; }
}

.hero__media img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center 42%;
  filter: saturate(.85) contrast(1.05);
}
.hero__media::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(180deg, rgba(12,24,38,.72) 0%, rgba(12,24,38,.45) 38%, rgba(12,24,38,.94) 100%),
    linear-gradient(90deg, rgba(12,24,38,.7) 0%, rgba(12,24,38,0) 68%);
}
.hero .wrap { position: relative; z-index: 2; width: 100%; }

.hero .eyebrow { color: #ff8a5c; }
.hero .eyebrow::after { background: rgba(246, 245, 242, .28); }

.hero__title { margin-block: 1.6rem 1.5rem; max-width: 16ch; }
.hero__title em {
  font-style: normal;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(246, 245, 242, .7);
  display: block;
}
.hero__text { max-width: 46ch; color: rgba(246, 245, 242, .82); }
.hero__cta { display: flex; flex-wrap: wrap; gap: .9rem; margin-top: 2.4rem; }

.scroll-hint {
  position: absolute;
  right: var(--gutter);
  bottom: clamp(2.5rem, 5vw, 4rem);
  z-index: 2;
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: rgba(246, 245, 242, .55);
  writing-mode: vertical-rl;
  display: flex;
  align-items: center;
  gap: .9rem;
}
.scroll-hint::after {
  content: "";
  width: 1px; height: 54px;
  background: linear-gradient(to bottom, rgba(246,245,242,.55), transparent);
  animation: drip 2.4s var(--ease) infinite;
}
@keyframes drip {
  0%, 100% { transform: scaleY(.35); transform-origin: top; opacity: .4; }
  50%      { transform: scaleY(1);   transform-origin: top; opacity: 1; }
}

/* --- 8. Cifras ----------------------------------------------------------- */
.stats {
  background: var(--ink);
  color: var(--paper);
  padding-block: 0;
  border-top: 1px solid rgba(246, 245, 242, .12);
}
.stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.stat {
  padding: clamp(2rem, 4vw, 3.2rem) clamp(1.1rem, 2vw, 2rem);
  border-right: 1px solid rgba(246, 245, 242, .12);
}
/* Las cifras de los extremos se alinean con el resto del contenido */
.stat:first-child { padding-left: 0; }
.stat:last-child  { padding-right: 0; border-right: 0; }
.stat__num {
  font-family: var(--font-display);
  font-size: clamp(2rem, 1.2rem + 2.6vw, 3.4rem);
  font-weight: 900;
  letter-spacing: -.04em;
  line-height: 1;
  display: flex;
  align-items: baseline;
  gap: .1em;
}
.stat__num sup {
  font-size: .38em;
  color: var(--accent);
  font-weight: 700;
  top: -.1em;
}
.stat__label {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: rgba(246, 245, 242, .58);
  margin-top: .9rem;
  line-height: 1.5;
}

/* --- 9. Qué hacemos (bento) ---------------------------------------------- */
.section--warm { background: var(--paper-warm); }
.section--warm .card { background: var(--paper-warm); }
.section--warm .card:hover { background: var(--paper); }

.offer {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border-block: 1px solid var(--line);
}
.offer--2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--paper);
  padding: clamp(1.8rem, 3vw, 2.8rem);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  position: relative;
  transition: background .35s var(--ease);
}
.card::after {
  content: "";
  position: absolute;
  left: 0; top: 0;
  width: 100%; height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .45s var(--ease);
}
.card:hover { background: var(--paper-warm); }
.card:hover::after { transform: scaleX(1); }

.card__index {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .18em;
  color: var(--ink-mute);
}
.card p { color: var(--ink-soft); font-size: .98rem; }
.card ul {
  list-style: none;
  padding: 0;
  margin-top: auto;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line-soft);
  display: grid;
  gap: .45rem;
}
.card li {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .04em;
  color: var(--ink-soft);
  display: flex;
  gap: .6rem;
}
.card li::before { content: "—"; color: var(--accent); }

/* --- 10. Proceso --------------------------------------------------------- */
.process {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(1rem, 2vw, 1.8rem);
}
.step { display: flex; flex-direction: column; gap: 1.1rem; }
.step__figure {
  position: relative;
  aspect-ratio: 3 / 4;
  overflow: hidden;
  background: var(--paper-warm);
  border-radius: 2px;
}
.step__figure picture { display: block; width: 100%; height: 100%; }
.step__figure img {
  width: 100%; height: 100%;
  object-fit: cover;
  filter: grayscale(.55) contrast(1.05);
  transition: transform .8s var(--ease), filter .6s var(--ease);
}
.step:hover .step__figure img { transform: scale(1.06); filter: grayscale(0) contrast(1.05); }
.step__figure figcaption {
  position: absolute;
  left: 0; top: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .16em;
  padding: .45rem .8rem;
}
.step h3 { font-size: 1.15rem; }
.step p { font-size: .93rem; color: var(--ink-soft); }

/* --- 11. Especificaciones ------------------------------------------------ */
.specs-layout {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: clamp(2.5rem, 6vw, 5.5rem);
  align-items: start;
}

.spec-tabs { display: flex; gap: .5rem; margin-bottom: 1.8rem; flex-wrap: wrap; }
.spec-tab {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: .6rem 1.1rem;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 2px;
  cursor: pointer;
  color: var(--ink-mute);
  transition: all .25s var(--ease);
}
.spec-tab:hover { color: var(--ink); border-color: var(--ink-mute); }
.spec-tab[aria-selected="true"] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.spec-panel[hidden] { display: none; }
.spec-table { width: 100%; border-collapse: collapse; }
.spec-table caption {
  text-align: left;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-mute);
  padding-bottom: 1rem;
}
.spec-table th,
.spec-table td {
  text-align: left;
  padding: 1rem .5rem;
  border-bottom: 1px solid var(--line-soft);
  vertical-align: baseline;
}
.spec-table th {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: .95rem;
  color: var(--ink-soft);
  width: 52%;
}
.spec-table td {
  font-family: var(--font-mono);
  font-size: .92rem;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}
.spec-table tr { transition: background .2s var(--ease); }
.spec-table tbody tr:hover { background: var(--paper-warm); }

.lab {
  background: var(--paper-warm);
  padding: clamp(1.8rem, 3.5vw, 2.8rem);
  border-radius: 2px;
  display: grid;
  gap: 1.2rem;
  align-content: start;
  border-left: 2px solid var(--accent);
}
.lab__kicker {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--accent);
}
.lab p { color: var(--ink-soft); font-size: .98rem; }
.lab dl {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: .55rem 1.2rem;
  margin: 0;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: .78rem;
}
.lab dt { color: var(--ink-mute); letter-spacing: .06em; }
.lab dd { margin: 0; font-weight: 500; }

/* --- 11b. Preguntas frecuentes ------------------------------------------ */
.faq {
  display: grid;
  border-top: 1px solid var(--line);
  max-width: 60rem;
}
.faq details {
  border-bottom: 1px solid var(--line);
}
.faq summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.5rem 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.02rem, .98rem + .3vw, 1.22rem);
  letter-spacing: -.012em;
  line-height: 1.3;
  transition: color .2s var(--ease);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary:hover { color: var(--accent); }

/* Signo + que gira hasta convertirse en − al abrir */
.faq summary::after {
  content: "";
  flex: none;
  width: 14px; height: 14px;
  margin-top: .3rem;
  background:
    linear-gradient(var(--accent), var(--accent)) center/100% 1.5px no-repeat,
    linear-gradient(var(--accent), var(--accent)) center/1.5px 100% no-repeat;
  transition: transform .35s var(--ease);
}
.faq details[open] summary::after { transform: rotate(135deg); }

.faq details p {
  padding-bottom: 1.6rem;
  max-width: 68ch;
  color: var(--ink-soft);
  font-size: .98rem;
}
.faq details[open] p { animation: faq-in .4s var(--ease); }
@keyframes faq-in {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: none; }
}

/* --- 12. Contacto -------------------------------------------------------- */
.contact {
  background: var(--ink);
  color: var(--paper);
  position: relative;
}
.contact .eyebrow { color: #ff8a5c; }
.contact .eyebrow::after { background: rgba(246, 245, 242, .22); }
.contact .lead { color: rgba(246, 245, 242, .78); }

.contact-layout {
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  gap: clamp(2.5rem, 6vw, 5rem);
  align-items: start;
}

.contact-list { display: grid; gap: 1.6rem; }
.contact-item {
  display: grid;
  gap: .35rem;
  padding-bottom: 1.6rem;
  border-bottom: 1px solid rgba(246, 245, 242, .14);
}
.contact-item:last-child { border-bottom: 0; padding-bottom: 0; }
.contact-item dt {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: rgba(246, 245, 242, .5);
}
.contact-item dd { margin: 0; font-size: 1.02rem; line-height: 1.5; }
.contact-item a { border-bottom: 1px solid rgba(246, 245, 242, .3); transition: border-color .2s var(--ease), color .2s var(--ease); }
.contact-item a:hover { color: #ff8a5c; border-color: #ff8a5c; }

/* Formulario */
.form { display: grid; gap: 1.15rem; }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.15rem; }

.field { display: grid; gap: .5rem; position: relative; }
.field label {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: rgba(246, 245, 242, .55);
}
.field input,
.field textarea {
  background: transparent;
  border: 0;
  border-bottom: 1px solid rgba(246, 245, 242, .28);
  padding: .75rem .1rem;
  color: var(--paper);
  font-size: 1rem;
  border-radius: 0;
  transition: border-color .25s var(--ease);
}
.field textarea { resize: vertical; min-height: 110px; line-height: 1.55; }
.field input::placeholder,
.field textarea::placeholder { color: rgba(246, 245, 242, .3); }
.field input:focus,
.field textarea:focus { outline: none; border-bottom-color: var(--accent); }
.field:focus-within label { color: #ff8a5c; }

.field .error {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .04em;
  color: #ff8a5c;
  min-height: 0;
}
.field.is-invalid input,
.field.is-invalid textarea { border-bottom-color: #ff8a5c; }

.form__note {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .08em;
  color: rgba(246, 245, 242, .45);
  line-height: 1.6;
}

.form__status {
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .04em;
  padding: .9rem 1.1rem;
  border-radius: 2px;
  border-left: 2px solid;
}
.form__status[hidden] { display: none; }
.form__status.is-ok  { background: rgba(255, 255, 255, .06); border-color: #6ee7a8; color: #a8f0c8; }
.form__status.is-err { background: rgba(217, 72, 28, .12); border-color: var(--accent); color: #ffb499; }

.spinner {
  width: 14px; height: 14px;
  border: 1.5px solid rgba(255, 255, 255, .35);
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* --- 13. WhatsApp flotante ----------------------------------------------- */
.wa {
  position: fixed;
  right: clamp(1rem, 3vw, 2rem);
  bottom: clamp(1rem, 3vw, 2rem);
  z-index: 90;
  display: flex;
  align-items: center;
  gap: .65rem;
  padding: .8rem 1.1rem;
  background: #25D366;
  color: #06301a;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: .74rem;
  font-weight: 500;
  letter-spacing: .08em;
  text-transform: uppercase;
  box-shadow: 0 12px 30px -12px rgba(6, 48, 26, .6);
  transform: translateY(120%);
  transition: transform .45s var(--ease), box-shadow .25s var(--ease);
}
.wa.is-visible { transform: translateY(0); }
.wa:hover { box-shadow: 0 16px 36px -12px rgba(6, 48, 26, .75); }
.wa svg { width: 18px; height: 18px; flex: none; }
.wa span { display: none; }
@media (min-width: 640px) { .wa span { display: inline; } }

/* --- 14. Pie ------------------------------------------------------------- */
.site-footer {
  background: var(--ink);
  color: rgba(246, 245, 242, .55);
  border-top: 1px solid rgba(246, 245, 242, .12);
  padding-block: 2.5rem;
  font-size: .84rem;
}
.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  align-items: center;
  justify-content: space-between;
}
.site-footer a:hover { color: var(--paper); }
.to-top {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: .5rem;
}
.to-top:hover .arrow { transform: translateY(-3px); }

/* --- 15. Animación de entrada ------------------------------------------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
  transition-delay: var(--delay, 0ms);
}
[data-reveal].is-in { opacity: 1; transform: none; }

/* --- 16. Responsive ------------------------------------------------------ */
@media (max-width: 1024px) {
  .offer   { grid-template-columns: repeat(2, 1fr); }
  .process { grid-template-columns: repeat(2, 1fr); }
  .specs-layout,
  .contact-layout { grid-template-columns: 1fr; }
  .stats__grid { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(2) { border-right: 0; }
  .stat:nth-child(-n+2) { border-bottom: 1px solid rgba(246, 245, 242, .12); }
}

@media (max-width: 760px) {
  :root { --header-h: 60px; }

  .nav-toggle { display: inline-flex; }

  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    padding: .5rem var(--gutter) 1.5rem;
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform .4s var(--ease), opacity .3s var(--ease);
    max-height: calc(100svh - var(--header-h));
    overflow-y: auto;
  }
  .nav.is-open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav a {
    font-size: 1.05rem;
    font-family: var(--font-display);
    font-weight: 700;
    letter-spacing: -.01em;
    text-transform: uppercase;
    padding-block: 1rem;
    border-bottom: 1px solid var(--line-soft);
  }
  .nav a::after { display: none; }
  .nav a.is-active { color: var(--accent); }
  .nav .btn { margin-top: 1.2rem; }

  .hero { min-height: 88svh; align-items: flex-end; }
  .hero__title em { -webkit-text-stroke-width: 1px; }
  .scroll-hint { display: none; }
  .hero__cta .btn { flex: 1 1 100%; }

  .offer   { grid-template-columns: 1fr; }
  .process { grid-template-columns: 1fr; gap: 2.5rem; }
  .step__figure { aspect-ratio: 16 / 11; }

  .form__row { grid-template-columns: 1fr; }

  .spec-table th, .spec-table td { display: block; width: auto; padding-block: .35rem; }
  .spec-table th { border-bottom: 0; padding-top: 1rem; }
  .spec-table td { padding-bottom: 1rem; }

  .site-footer .wrap { justify-content: flex-start; }
}

@media (max-width: 420px) {
  .stats__grid { grid-template-columns: 1fr; }
  .stat { border-right: 0; border-bottom: 1px solid rgba(246, 245, 242, .12); }
  .stat:last-child { border-bottom: 0; }
}

/* --- 17. Preferencias del usuario --------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
}

@media print {
  .site-header, .wa, .scroll-hint, .form { display: none; }
  body { background: #fff; color: #000; }
}