/* ConstruxGen — landing */

:root {
  /* Paleta de marca */
  --orange: #F26B21;
  --charcoal: #2D2D2D;
  --gray: #58595B;
  --gray-light: #CCCCCC;
  --white: #FFFFFF;

  /* Derivados */
  --orange-dark: #D4561A;
  --charcoal-deep: #1F1F1F;
  --surface: #F4F4F4;
  --border: #E2E2E2;
  --danger: #B42318;
  --success: #1E7B3A;

  --font-display: "Oswald", "Arial Narrow", sans-serif;
  --font-body: "Montserrat", system-ui, sans-serif;

  --radius: 6px;
  --container: 1160px;
  --header-h: 72px;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--gray);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

h1, h2, h3 {
  font-family: var(--font-display);
  color: var(--charcoal);
  line-height: 1.15;
  margin: 0 0 .5em;
  text-transform: uppercase;
  letter-spacing: .01em;
}

a { color: inherit; }

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 20px;
}

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

.skip-link {
  position: absolute; left: 12px; top: -48px; z-index: 100;
  background: var(--orange); color: var(--white); padding: 8px 14px;
  border-radius: var(--radius); font-weight: 600; text-decoration: none;
}
.skip-link:focus { top: 12px; }

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

.icon { width: 1.2em; height: 1.2em; flex: none; }

/* ---------- Botones ---------- */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5em;
  font-family: var(--font-display);
  font-size: 1.05rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: .04em;
  text-decoration: none;
  padding: .8em 1.6em;
  border: 2px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background-color .2s, color .2s, border-color .2s, transform .2s;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--orange); color: var(--white); }
.btn-primary:hover { background: var(--orange-dark); }
.btn-ghost { border-color: rgba(255,255,255,.45); color: var(--white); }
.btn-ghost:hover { border-color: var(--white); background: rgba(255,255,255,.08); }
.btn-sm { padding: .5em 1.1em; font-size: .95rem; }
.btn-block { width: 100%; }
.btn[disabled] { opacity: .6; cursor: progress; transform: none; }

/* ---------- Marca ---------- */

.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand img { border-radius: 6px; }

.wordmark { display: flex; flex-direction: column; line-height: 1; }
.wordmark-name {
  font-family: var(--font-body);
  font-weight: 900;
  font-size: 1.35rem;
  letter-spacing: -.01em;
  color: var(--white);
}
.wordmark-x {
  display: inline-block;
  background: var(--orange);
  color: var(--charcoal);
  padding: 0 .12em;
  margin: 0 .06em;
}
.wordmark-sub {
  font-family: var(--font-display);
  font-size: .62rem;
  letter-spacing: .32em;
  text-transform: uppercase;
  color: var(--gray-light);
  margin-top: 5px;
}

/* ---------- Header ---------- */

.site-header {
  position: sticky; top: 0; z-index: 50;
  background: var(--charcoal);
  border-bottom: 3px solid var(--orange);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  min-height: var(--header-h);
}

.site-nav { display: flex; align-items: center; gap: 28px; }
.site-nav a:not(.btn) {
  color: var(--white);
  text-decoration: none;
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: .06em;
  font-size: .95rem;
}
.site-nav a:not(.btn):hover { color: var(--orange); }

.nav-toggle {
  display: none;
  background: none; border: 0; padding: 10px; cursor: pointer;
}
.nav-toggle-bar,
.nav-toggle-bar::before,
.nav-toggle-bar::after {
  display: block; width: 24px; height: 2px; background: var(--white);
  position: relative; transition: transform .2s, background-color .2s;
}
.nav-toggle-bar::before, .nav-toggle-bar::after { content: ""; position: absolute; left: 0; }
.nav-toggle-bar::before { top: -7px; }
.nav-toggle-bar::after { top: 7px; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar::before { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar::after { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */

.hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(160deg, #3a3a3a 0%, var(--charcoal) 45%, var(--charcoal-deep) 100%);
  color: var(--gray-light);
  padding: 96px 0 104px;
}

/* Franjas diagonales naranjas, igual que en el material impreso */
.hero-stripes span {
  position: absolute;
  background: var(--orange);
  transform: skewX(-38deg);
}
.hero-stripes span:nth-child(1) { width: 34px; height: 140%; top: -20%; right: 8%; opacity: .9; }
.hero-stripes span:nth-child(2) { width: 12px; height: 140%; top: -20%; right: calc(8% + 60px); opacity: .6; }
.hero-stripes span:nth-child(3) { width: 240px; height: 18px; bottom: 0; left: -40px; }

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 56px;
  align-items: center;
}

.eyebrow {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: .2em;
  font-size: .9rem;
  color: var(--orange);
  margin: 0 0 16px;
}

.hero h1 {
  color: var(--white);
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 700;
}
.hero h1 .accent { color: var(--orange); }

.lead {
  font-size: 1.12rem;
  max-width: 34em;
  margin: 0 0 32px;
  color: #DADADA;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }

.values {
  list-style: none; padding: 0; margin: 40px 0 0;
  display: flex; flex-wrap: wrap; gap: 8px 24px;
  font-family: var(--font-display);
  text-transform: uppercase; letter-spacing: .12em;
  color: var(--white);
}
.values li { display: flex; align-items: center; }
.values li + li::before {
  content: ""; width: 8px; height: 8px; margin-right: 24px;
  background: var(--orange); transform: rotate(45deg);
}

.hero-mark { display: flex; flex-direction: column; align-items: center; gap: 24px; }
.hero-mark img {
  width: min(320px, 70vw);
  height: auto;
  border-radius: 14px;
  box-shadow: 0 30px 60px rgba(0,0,0,.45), 0 0 0 1px rgba(255,255,255,.08);
}
.hero-tagline {
  font-family: var(--font-display);
  font-size: 1.4rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--white);
  text-align: center;
  line-height: 1.25;
  margin: 0;
  padding-bottom: 8px;
  border-bottom: 3px solid var(--orange);
}

/* ---------- Secciones ---------- */

.section { padding: 96px 0; }
.section-head { max-width: 720px; margin-bottom: 48px; }
.section-head h2 { font-size: clamp(1.8rem, 3.6vw, 2.6rem); }
.section-lead { margin: 0; font-size: 1.05rem; }

.kicker {
  display: inline-block;
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: .14em;
  font-weight: 600;
  font-size: .9rem;
  color: var(--white);
  background: var(--orange);
  padding: 4px 18px 4px 12px;
  margin: 0 0 16px;
  clip-path: polygon(0 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
}

.section-dark { background: var(--charcoal); color: var(--gray-light); }
.section-dark h2 { color: var(--white); }

/* Servicios */
.services {
  list-style: none; padding: 0; margin: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.service {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 28px 26px;
  border-top: 4px solid var(--orange);
  transition: transform .2s, box-shadow .2s;
}
.service:hover { transform: translateY(-3px); box-shadow: 0 14px 30px rgba(0,0,0,.08); }
.service-icon {
  width: 48px; height: 48px; margin-bottom: 14px;
  fill: none; stroke: var(--orange); stroke-width: 2.5;
  stroke-linecap: round; stroke-linejoin: round;
}
.service h3 { font-size: 1.2rem; }
.service p { margin: 0; font-size: .95rem; }

/* Galería */
.gallery {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 200px;
  gap: 12px;
}
.gallery figure {
  position: relative; margin: 0; overflow: hidden;
  border-radius: var(--radius);
  background: var(--charcoal-deep);
}
.gallery figure.wide { grid-column: span 2; }
.gallery img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .4s;
}
.gallery figure:hover img { transform: scale(1.05); }
.gallery figcaption {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 24px 14px 10px;
  font-family: var(--font-display);
  text-transform: uppercase; letter-spacing: .06em; font-size: .9rem;
  color: var(--white);
  background: linear-gradient(transparent, rgba(0,0,0,.75));
}

/* Proceso */
.steps {
  list-style: none; padding: 0; margin: 0;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
  counter-reset: step;
}
.steps li {
  counter-increment: step;
  position: relative;
  padding: 28px 22px 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.steps li::before {
  content: "0" counter(step);
  display: block;
  font-family: var(--font-display);
  font-size: 2.6rem;
  font-weight: 700;
  line-height: 1;
  color: var(--orange);
  margin-bottom: 12px;
}
.steps h3 { font-size: 1.2rem; }
.steps p { margin: 0; font-size: .95rem; }

/* Contacto */
.section-contact { background: var(--surface); }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 56px;
  align-items: start;
}
.contact-info h2 { font-size: clamp(1.8rem, 3.6vw, 2.6rem); }
.contact-list { list-style: none; padding: 0; margin: 28px 0 0; display: grid; gap: 16px; }
.contact-list li { display: flex; align-items: center; gap: 12px; }
.contact-list .icon { color: var(--orange); width: 24px; height: 24px; }
.contact-list a { color: var(--charcoal); font-weight: 600; text-decoration: none; }
.contact-list a:hover { color: var(--orange); }

.contact-form {
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: 0 20px 50px rgba(0,0,0,.08);
  border-top: 4px solid var(--orange);
}
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 18px; min-width: 0; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field label { font-weight: 600; font-size: .9rem; color: var(--charcoal); }
.field label span { color: var(--orange); }
.field input, .field select, .field textarea {
  font: inherit; color: var(--charcoal);
  padding: 12px 14px;
  border: 1px solid #C9C9C9;
  border-radius: var(--radius);
  background: var(--white);
  width: 100%;
}
.field textarea { resize: vertical; min-height: 130px; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--orange);
  box-shadow: 0 0 0 3px rgba(242,107,33,.2);
}
.field [aria-invalid="true"] { border-color: var(--danger); }
.field-error { color: var(--danger); font-size: .85rem; }

.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.form-status { margin: 14px 0 0; font-weight: 600; min-height: 1.6em; }
.form-status.is-error { color: var(--danger); }
.form-status.is-success { color: var(--success); }

/* Footer */
.site-footer { background: var(--charcoal-deep); color: var(--gray-light); padding: 40px 0; border-top: 3px solid var(--orange); }
.footer-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px; }
.footer-tagline {
  font-family: var(--font-display); text-transform: uppercase;
  letter-spacing: .12em; color: var(--white); margin: 0;
}
.footer-legal { margin: 0; font-size: .85rem; width: 100%; color: #9A9A9A; }

/* WhatsApp flotante */
.wa-float {
  position: fixed; right: 20px; bottom: 20px; z-index: 60;
  width: 58px; height: 58px; border-radius: 50%;
  display: grid; place-items: center;
  background: #25D366; color: var(--white);
  box-shadow: 0 10px 24px rgba(0,0,0,.25);
  transition: transform .2s;
}
.wa-float:hover { transform: scale(1.07); }
.wa-float svg { width: 32px; height: 32px; }

/* ---------- Responsive ---------- */

@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .hero-mark { order: -1; }
  .hero-mark img { width: 180px; }
  .hero-tagline { display: none; }
  .services { grid-template-columns: repeat(2, 1fr); }
  .gallery { grid-template-columns: repeat(2, 1fr); grid-auto-rows: 170px; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; gap: 36px; }
}

@media (max-width: 760px) {
  .nav-toggle { display: block; }
  .site-nav {
    position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--charcoal);
    border-bottom: 3px solid var(--orange);
    padding: 8px 20px 20px;
    display: none;
  }
  .site-nav.is-open { display: flex; }
  .site-nav a:not(.btn) { padding: 14px 0; border-bottom: 1px solid rgba(255,255,255,.08); }
  .site-nav .btn { margin-top: 16px; }
}

@media (max-width: 600px) {
  .container { padding-inline: 16px; }
  .hero { padding: 56px 0 72px; }
  .section { padding: 64px 0; }
  .services, .steps { grid-template-columns: 1fr; }
  .gallery { grid-auto-rows: 140px; }
  .field-row { grid-template-columns: 1fr; gap: 0; }
  .contact-form { padding: 22px 18px; }
  .wordmark-name { font-size: 1.1rem; }
  .wordmark-sub { font-size: .52rem; letter-spacing: .26em; }
  .brand img { width: 38px; height: 38px; }
  .hero-actions .btn { width: 100%; }
  .hero-stripes span:nth-child(1), .hero-stripes span:nth-child(2) { right: -40px; opacity: .35; }
  .values { font-size: .85rem; letter-spacing: .08em; gap: 8px 12px; }
  .values li + li::before { margin-right: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}