:root {
  --red: #aa2c2d;
  --red-dark: #8a2223;
  --black: #1d1b1b;
  --gray: #6b6b6b;
  --gray-light: #b8babc;
  --bg: #f3efec;        /* off-white cálido: fondo base, más suave que el blanco puro */
  --bg-light: #ece6e1;  /* tono alterno un poco más cálido */
  --white: #ffffff;
  --radius: 8px;
  --shadow: 0 10px 30px rgba(0,0,0,.12);
  --maxw: 1180px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--black);
  background: var(--bg);
  line-height: 1.6;
}

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

a { color: inherit; text-decoration: none; }

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: 90px 0; }
.section--alt { background: var(--bg-light); }

/* Sección oscura (corta el blanco; la galería de obras luce sobre negro) */
.section--dark { background: var(--black); color: #e8e6e6; }
.section--dark h2 { color: var(--white); }
.section--dark .section-head p { color: #b6b2b2; }
.section--dark .eyebrow { color: #ff8a8a; }

.eyebrow {
  color: var(--red);
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  font-size: .8rem;
  margin-bottom: 10px;
  display: block;
}

h1, h2, h3 { font-family: inherit; font-weight: 800; line-height: 1.15; }
h2 { font-size: clamp(1.8rem, 3vw, 2.4rem); margin-bottom: 18px; }
.section-head { max-width: 680px; margin-bottom: 50px; }
.section-head h2 { position: relative; padding-bottom: 16px; }
.section-head h2::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 56px; height: 4px;
  background: var(--red);
  border-radius: 2px;
}
.section-head.center h2::after { left: 50%; transform: translateX(-50%); }
.section-head p { color: var(--gray); font-size: 1.05rem; }
.center { text-align: center; margin-left: auto; margin-right: auto; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 999px;
  font-weight: 700;
  font-size: .95rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease, background .2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: var(--red); color: var(--white); box-shadow: 0 8px 22px rgba(170,44,45,.35); }
.btn--primary:hover { background: var(--red-dark); }
.btn--outline { border-color: var(--red); color: var(--white); }
.btn--outline:hover { background: var(--red); border-color: var(--red); }
.btn--dark { border-color: var(--black); color: var(--black); }
.btn--dark:hover { background: var(--black); color: var(--white); }
.btn--whatsapp { background: #25d366; color: var(--white); box-shadow: 0 8px 22px rgba(37,211,102,.35); }
.btn--whatsapp:hover { background: #1ebe5a; }
.btn--whatsapp svg { flex-shrink: 0; }

/* Latido del botón "Pedir presupuesto" */
.btn--beat { animation: btnBeat 1.5s ease-in-out infinite; }
.btn--beat:hover { animation-play-state: paused; }
@keyframes btnBeat {
  0%, 100% { transform: scale(1); }
  10% { transform: scale(1.07); }
  20% { transform: scale(1); }
  30% { transform: scale(1.05); }
  40% { transform: scale(1); }
}
@media (prefers-reduced-motion: reduce) {
  .btn--beat { animation: none; }
}

/* Header */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: var(--black);
  border-bottom: 1px solid rgba(255,255,255,.08);
  transition: background .25s ease, box-shadow .25s ease, padding .25s ease;
  padding: 16px 0;
}
.header.scrolled {
  background: var(--black);
  box-shadow: 0 2px 18px rgba(0,0,0,.4);
  padding: 9px 0;
}
.header .container { display: flex; align-items: center; justify-content: space-between; }
.logo { display: inline-grid; align-items: center; }
.logo img { grid-area: 1 / 1; height: 52px; width: auto; transition: height .25s ease, opacity .25s ease; }
.header.scrolled .logo img { height: 42px; }

.nav { display: flex; gap: 32px; }
.nav a {
  font-weight: 600;
  font-size: .95rem;
  color: var(--white);
  transition: color .2s;
}
.nav a:hover { color: var(--red); }

.header-cta { display: flex; align-items: center; gap: 18px; }
.burger { display: none; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none; }
.burger span { width: 26px; height: 3px; background: var(--white); border-radius: 2px; }

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  color: var(--white);
  overflow: hidden;
}
.hero-video {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  z-index: 0;
}
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(20,18,18,.55) 0%, rgba(20,18,18,.72) 55%, rgba(20,18,18,.92) 100%);
}
.hero-content { position: relative; z-index: 2; padding-top: 120px; max-width: 760px; }
.hero-content .eyebrow { color: #ff8a8a; }
.hero-content h1 { font-size: clamp(2.4rem, 5.4vw, 3.8rem); margin-bottom: 20px; }
.hero-content p { font-size: 1.15rem; color: #ececec; margin-bottom: 34px; max-width: 560px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* Rotador de palabras (estilo M2) */
.hero-title { display: flex; flex-direction: column; }
.rotator {
  position: relative;
  display: block;
  height: 1.2em;
  overflow: hidden;
  color: var(--red);
}
.rotator-word {
  position: absolute;
  left: 0; top: 0;
  white-space: nowrap;
  opacity: 0;
  transform: translateY(100%);
  transition: opacity .5s ease, transform .5s ease;
}
.rotator-word.is-active { opacity: 1; transform: translateY(0); }
.rotator-word.is-out { opacity: 0; transform: translateY(-100%); }
.hero-title-static { color: var(--white); }

/* Reveal de entrada del hero.
   Solo se oculta cuando body.anim está activo (página visible);
   si la pestaña está en segundo plano nunca se oculta y se ve completo. */
.anim .hero-content > * { opacity: 0; transform: translateY(26px); }
.hero.reveal-in .hero-content > * {
  opacity: 1; transform: none;
  transition: opacity .7s ease, transform .7s ease;
}
.hero.reveal-in .hero-content > *:nth-child(1) { transition-delay: .05s; }
.hero.reveal-in .hero-content > *:nth-child(2) { transition-delay: .18s; }
.hero.reveal-in .hero-content > *:nth-child(3) { transition-delay: .31s; }
.hero.reveal-in .hero-content > *:nth-child(4) { transition-delay: .44s; }
.anim .hero-stats { opacity: 0; transform: translateY(26px); }
.hero.reveal-in .hero-stats {
  opacity: 1; transform: none;
  transition: opacity .7s ease .55s, transform .7s ease .55s;
}

/* Preloader */
.preloader {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: var(--black);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform .8s cubic-bezier(.76,0,.24,1), opacity .5s ease;
}
.preloader.is-hidden { transform: translateY(-100%); }
.preloader-inner { display: flex; flex-direction: column; align-items: center; gap: 26px; }
.preloader-logo {
  width: min(70vw, 420px);
  height: auto;
  opacity: 0;
  transform: scale(.9);
  animation: preloaderLogoIn .9s cubic-bezier(.22,1,.36,1) forwards;
}
@keyframes preloaderLogoIn {
  to { opacity: 1; transform: scale(1); }
}
.preloader-bar {
  position: relative;
  width: 180px; height: 3px;
  background: rgba(255,255,255,.15);
  border-radius: 2px;
  overflow: hidden;
}
.preloader-bar-fill {
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 0;
  background: var(--red);
  animation: preloaderBar 2.2s ease forwards;
}
@keyframes preloaderBar {
  0% { width: 0; }
  100% { width: 100%; }
}

.hero-stats {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 24px; margin-top: 70px; padding-top: 36px;
  border-top: 1px solid rgba(255,255,255,.25);
  max-width: 920px;
}
.stat-num { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 800; color: var(--white); }
.stat-label { font-size: .82rem; color: #d9d4d4; text-transform: uppercase; letter-spacing: .06em; }

/* Quienes somos */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.about-grid img { border-radius: var(--radius); box-shadow: var(--shadow); }
.about-text p { color: var(--gray); margin-bottom: 18px; font-size: 1.05rem; }
.about-badge {
  display: inline-flex; flex-direction: column; align-items: flex-start;
  background: var(--red); color: var(--white);
  padding: 18px 26px; border-radius: var(--radius); margin-top: 10px;
  box-shadow: 0 10px 24px rgba(170,44,45,.3);
}
.about-badge strong { font-size: 2.2rem; color: var(--white); line-height: 1; }
.about-badge span { font-size: .8rem; text-transform: uppercase; letter-spacing: .08em; color: #ffd9d9; margin-top: 4px; }

/* Mision/Vision */
.mv-section {
  background: linear-gradient(135deg, var(--red) 0%, var(--red-dark) 100%);
  position: relative;
  overflow: hidden;
}
.mv-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 85% 15%, rgba(255,255,255,.12), transparent 55%);
  pointer-events: none;
}
.mv-logo-wrap { text-align: center; margin-bottom: 46px; }
.mv-logo {
  height: 64px;
  width: auto;
  margin: 0 auto;
  background: var(--white);
  padding: 14px 28px;
  border-radius: 999px;
  box-shadow: 0 10px 26px rgba(0,0,0,.25);
}
.mv-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; position: relative; z-index: 1; }
.mv-card {
  position: relative;
  overflow: hidden;
  background: rgba(255,255,255,.96);
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow);
  border-top: 4px solid var(--black);
  transition: transform .28s ease, box-shadow .28s ease;
}
/* Barra roja lateral que crece al pasar el mouse */
.mv-card::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 5px;
  background: var(--red);
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform .3s ease;
}
.mv-card:hover { transform: translateY(-6px); box-shadow: 0 18px 42px rgba(0,0,0,.3); }
.mv-card:hover::before { transform: scaleY(1); }

.mv-card h3 {
  position: relative;
  display: inline-block;
  font-size: 1.4rem;
  margin-bottom: 14px;
  padding-bottom: 10px;
  color: var(--red);
}
/* Subrayado que se dibuja solo al aparecer la tarjeta */
.mv-card h3::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 3px;
  background: var(--red);
  transform: scaleX(1);
  transform-origin: left;
  transition: transform .6s ease .35s;
}
.anim .mv-card h3::after { transform: scaleX(0); }
.anim .mv-card.in h3::after { transform: scaleX(1); }
.mv-card p { color: var(--gray); }

/* Entrada de las tarjetas desde los costados */
.anim .mv-grid .mv-card:nth-child(1).in { animation: mvCardInLeft .7s cubic-bezier(.22,1,.36,1) .15s backwards; }
.anim .mv-grid .mv-card:nth-child(2).in { animation: mvCardInRight .7s cubic-bezier(.22,1,.36,1) .28s backwards; }
@keyframes mvCardInLeft {
  from { opacity: 0; transform: translateX(-60px); }
  to   { opacity: 1; transform: translateX(0); }
}
@keyframes mvCardInRight {
  from { opacity: 0; transform: translateX(60px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* Servicios */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.service-card {
  background: var(--white);
  border: 1px solid #eee;
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s;
}
.service-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: transparent; }

/* Entrada en cascada de las tarjetas de servicios (efecto al llegar a la sección) */
.anim .services-grid .service-card.in {
  animation: serviceCardIn .65s cubic-bezier(.22,1,.36,1) backwards;
}
@keyframes serviceCardIn {
  from { opacity: 0; transform: translateY(48px) scale(.92); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
.anim .services-grid .service-card:nth-child(1).in { animation-delay: .00s; }
.anim .services-grid .service-card:nth-child(2).in { animation-delay: .09s; }
.anim .services-grid .service-card:nth-child(3).in { animation-delay: .18s; }
.anim .services-grid .service-card:nth-child(4).in { animation-delay: .27s; }
.anim .services-grid .service-card:nth-child(5).in { animation-delay: .36s; }
.anim .services-grid .service-card:nth-child(6).in { animation-delay: .45s; }
.service-icon {
  width: 52px; height: 52px;
  border-radius: 50%;
  background: var(--red);
  color: var(--white);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 18px;
  box-shadow: 0 6px 16px rgba(170,44,45,.35);
  /* easing con sobrepaso para el efecto "pop" con rebote */
  transition: transform .4s cubic-bezier(.34,1.56,.64,1), box-shadow .3s ease;
}
.service-card:hover .service-icon {
  transform: scale(1.14) rotate(-7deg);
  box-shadow: 0 10px 22px rgba(170,44,45,.5);
}
.service-card { border-top: 3px solid transparent; }
.service-card:hover { border-top-color: var(--red); }
.service-card h3 { font-size: 1.1rem; margin-bottom: 10px; }
.service-card p { color: var(--gray); font-size: .95rem; }

/* Obras */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
}
.project-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  aspect-ratio: 4/3;
}
.project-card img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s ease; }
.project-card:hover img { transform: scale(1.06); }
.project-info {
  position: absolute; left: 0; right: 0; bottom: 0;
  background: linear-gradient(180deg, transparent, rgba(10,9,9,.88));
  color: var(--white);
  padding: 50px 22px 18px;
}
.project-collage .collage-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 3px;
  width: 100%;
  height: 100%;
}
.project-collage .collage-grid img { display: block; width: 100%; height: 100%; min-height: 0; min-width: 0; object-fit: cover; transition: transform .35s ease; }
.project-collage:hover .collage-grid img { transform: scale(1.06); }
.project-info .tag {
  display: inline-block; background: var(--red); color: var(--white);
  font-size: .72rem; font-weight: 700; text-transform: uppercase;
  padding: 3px 10px; border-radius: 4px; margin-bottom: 8px; letter-spacing: .05em;
}
.project-info h3 { font-size: 1.15rem; }

/* Contacto */
.contact-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
}
.contact-info h2 { margin-bottom: 14px; }
.contact-info p { color: var(--gray); margin-bottom: 30px; }
.contact-item { display: flex; gap: 16px; align-items: flex-start; margin-bottom: 22px; }
.contact-item .ic {
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--red); color: var(--white);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; font-size: 1.1rem;
}
.contact-item strong { display: block; }
.contact-item span, .contact-item a { color: var(--gray); }

.contact-form {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 36px;
}
.contact-form input, .contact-form textarea {
  width: 100%;
  padding: 13px 16px;
  border: 1px solid #ddd;
  border-radius: 6px;
  margin-bottom: 16px;
  font-family: inherit;
  font-size: .95rem;
}
.contact-form button { width: 100%; justify-content: center; }
.form-note { font-size: .78rem; color: var(--gray); margin-top: 10px; text-align: center; }

/* WhatsApp floating button */
.whatsapp-float {
  position: fixed;
  bottom: 26px; right: 26px;
  width: 58px; height: 58px;
  border-radius: 50%;
  background: #25d366;
  color: var(--white);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem;
  box-shadow: 0 8px 24px rgba(0,0,0,.25);
  z-index: 99;
  animation: pulse 2.4s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(37,211,102,.5); }
  70% { box-shadow: 0 0 0 14px rgba(37,211,102,0); }
  100% { box-shadow: 0 0 0 0 rgba(37,211,102,0); }
}

/* Footer */
.footer {
  background: var(--black);
  color: var(--gray-light);
  padding: 50px 0 24px;
  text-align: center;
  border-top: 4px solid var(--red);
}
.footer .logo { justify-content: center; margin-bottom: 16px; }
.footer .logo img { height: 56px; margin: 0 auto; }
.footer-links { display: flex; justify-content: center; gap: 26px; margin: 18px 0; flex-wrap: wrap; }
.footer-bottom { font-size: .82rem; color: #8a8888; margin-top: 24px; border-top: 1px solid rgba(255,255,255,.08); padding-top: 20px; }

/* Reveal animation (solo oculta cuando body.anim está activo) */
.reveal { transition: opacity .6s ease, transform .6s ease; }
.anim .reveal { opacity: 0; transform: translateY(24px); }
.anim .reveal.in { opacity: 1; transform: translateY(0); }

/* Responsive */
@media (max-width: 900px) {
  .about-grid, .mv-grid, .contact-wrap { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .projects-grid { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .nav { display: none; }
  .burger { display: flex; }
}
@media (max-width: 560px) {
  .services-grid { grid-template-columns: 1fr; }
  .section { padding: 60px 0; }
}

.nav.open {
  display: flex;
  position: absolute;
  top: 64px; left: 0; right: 0;
  background: var(--black);
  flex-direction: column;
  padding: 20px 24px;
  box-shadow: 0 10px 20px rgba(0,0,0,.35);
  border-top: 1px solid rgba(255,255,255,.08);
}
.nav.open a { color: var(--white); padding: 10px 0; }