/* ===========================================================
   EcoPro Ingeniería — stylesheet
   Colores: Navy #001C3D · Azul #0056B3 · Verde #4CAF50
   Tipografía: Anton (títulos) · Montserrat (texto)
=========================================================== */

:root{
  --c-navy: #001C3D;
  --c-navy-2: #04305c;
  --c-blue: #0056B3;
  --c-blue-dark: #003f85;
  --c-green: #4CAF50;
  --c-white: #FFFFFF;
  --c-ink: #333333;
  --c-ink-soft: #5b6472;
  --c-bg-soft: #F4F7FA;
  --c-border: #E3E9EF;

  --font-display: 'Anton', 'Impact', 'Arial Narrow', sans-serif;
  --font-body: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --container: 1240px;
  --radius: 14px;
  --shadow-sm: 0 2px 10px rgba(0, 28, 61, 0.06);
  --shadow-md: 0 12px 32px rgba(0, 28, 61, 0.12);
  --shadow-lg: 0 24px 60px rgba(0, 28, 61, 0.18);

  --ease: cubic-bezier(.4,0,.2,1);
}

/* ---------- Reset ---------- */
*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin: 0;
  font-family: var(--font-body);
  color: var(--c-ink);
  background: var(--c-white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body.is-loading{ overflow: hidden; height: 100%; }
img{ max-width: 100%; display: block; }
a{ color: inherit; text-decoration: none; }
ul{ list-style: none; margin: 0; padding: 0; }
h1,h2,h3,h4{ margin: 0; }
p{ margin: 0 0 1em; }
p:last-child{ margin-bottom: 0; }
button{ font-family: inherit; }

.container{
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}

.icon{ width: 1.1em; height: 1.1em; fill: currentColor; flex-shrink: 0; }

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *, *::before, *::after{ animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

/* ---------- Typography helpers ---------- */
.eyebrow{
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-blue);
  margin-bottom: 0.9rem;
  position: relative;
  padding-left: 1.4rem;
}
.eyebrow::before{
  content: "";
  position: absolute;
  left: 0; top: 50%;
  width: 1rem; height: 2px;
  background: var(--c-green);
  transform: translateY(-50%);
}
.eyebrow--light{ color: #8fc2ff; }
.eyebrow--light::before{ background: var(--c-green); }

.section-title{
  font-family: var(--font-display);
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.01em;
  font-size: clamp(1.7rem, 3.6vw, 2.75rem);
  line-height: 1.15;
  color: var(--c-navy);
  margin-bottom: 1rem;
  max-width: 26ch;
}
.section-title--light{ color: var(--c-white); }

.section-intro{
  max-width: 62ch;
  color: var(--c-ink-soft);
  font-size: clamp(0.98rem, 1.4vw, 1.08rem);
  margin-bottom: 3rem;
}

.lead{
  font-size: clamp(1.05rem, 1.6vw, 1.2rem);
  font-weight: 600;
  color: var(--c-navy);
}

/* ---------- Buttons ---------- */
.btn{
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  padding: 0.95rem 1.8rem;
  border-radius: 999px;
  border: 2px solid transparent;
  white-space: nowrap;
  cursor: pointer;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), background-color .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease);
}
.btn--sm{ padding: 0.6rem 1.2rem; font-size: 0.85rem; }
.btn--primary{
  background: var(--c-blue);
  color: var(--c-white);
  box-shadow: 0 10px 24px rgba(0,86,179,0.28);
}
.btn--primary:hover{ background: var(--c-blue-dark); transform: translateY(-2px); box-shadow: 0 14px 30px rgba(0,86,179,0.35); }
.btn--outline-light{
  border-color: rgba(255,255,255,0.55);
  color: var(--c-white);
  background: rgba(255,255,255,0.06);
  backdrop-filter: blur(6px);
}
.btn--outline-light:hover{ background: rgba(255,255,255,0.16); border-color: var(--c-white); transform: translateY(-2px); }

/* ===========================================================
   SPLASH SCREEN
=========================================================== */
#splash{
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: radial-gradient(120% 120% at 50% 30%, var(--c-navy-2) 0%, var(--c-navy) 65%);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity .6s var(--ease), visibility .6s var(--ease);
}
#splash.is-hidden{ opacity: 0; visibility: hidden; pointer-events: none; }
.splash__inner{ text-align: center; }
.splash__logo{
  width: min(58vw, 300px);
  animation: splashIn 1s var(--ease) both;
}
.splash__bar{
  width: 140px;
  height: 3px;
  margin: 1.8rem auto 0;
  background: rgba(255,255,255,0.14);
  border-radius: 2px;
  overflow: hidden;
}
.splash__bar span{
  display: block;
  height: 100%;
  width: 40%;
  background: linear-gradient(90deg, var(--c-blue), var(--c-green));
  border-radius: 2px;
  animation: splashBar 1.1s ease-in-out infinite;
}
@keyframes splashIn{
  from{ opacity: 0; transform: scale(.88) translateY(8px); }
  to{ opacity: 1; transform: scale(1) translateY(0); }
}
@keyframes splashBar{
  0%{ transform: translateX(-120%); }
  100%{ transform: translateX(320%); }
}

/* ===========================================================
   HEADER
=========================================================== */
.site-header{
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding-block: 1.3rem;
  background: transparent;
  transition: background-color .35s var(--ease), box-shadow .35s var(--ease), padding .35s var(--ease);
}
.site-header.is-scrolled{
  background: rgba(255,255,255,0.98);
  box-shadow: var(--shadow-sm);
  padding-block: 0.7rem;
}
.header__inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}
.brand{ display: block; flex-shrink: 0; }
.brand__logo{ height: 54px; width: auto; transition: height .35s var(--ease); }
.site-header.is-scrolled .brand__logo{ height: 44px; }
/* Sobre el hero oscuro se ve el logo claro (texto blanco); al hacer scroll, el header se aclara y se muestra el logo oscuro (texto navy) */
.brand__logo--onlight{ display: none; }
.site-header.is-scrolled .brand__logo--ondark{ display: none; }
.site-header.is-scrolled .brand__logo--onlight{ display: block; }

.nav__list{
  display: flex;
  gap: clamp(1rem, 2vw, 2rem);
}
.nav__link{
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--c-white);
  position: relative;
  padding-bottom: 4px;
  transition: color .3s var(--ease);
}
.nav__link::after{
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 2px;
  background: var(--c-green);
  transition: width .3s var(--ease);
}
.nav__link:hover::after,
.nav__link.is-active::after{ width: 100%; }
.site-header.is-scrolled .nav__link{ color: var(--c-navy); }

.header__actions{ flex-shrink: 0; }

.nav-toggle{
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px; height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  flex-shrink: 0;
}
.nav-toggle span{
  display: block;
  height: 2px;
  background: var(--c-white);
  border-radius: 2px;
  transition: transform .3s var(--ease), opacity .3s var(--ease), background-color .3s var(--ease);
}
.site-header.is-scrolled .nav-toggle span{ background: var(--c-navy); }
.nav-toggle.is-open span:nth-child(1){ transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2){ opacity: 0; }
.nav-toggle.is-open span:nth-child(3){ transform: translateY(-7px) rotate(-45deg); }

/* ===========================================================
   HERO
=========================================================== */
.hero{
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  isolation: isolate;
}
.hero__media{
  position: absolute; inset: 0; z-index: -2;
}
.hero__media img{
  width: 100%; height: 100%; object-fit: cover;
  transform: scale(1.04);
}
.hero__scrim{
  position: absolute; inset: 0; z-index: -1;
  background:
    linear-gradient(180deg, rgba(0,20,43,0.75) 0%, rgba(0,20,43,0.55) 40%, rgba(0,20,43,0.88) 100%),
    linear-gradient(90deg, rgba(0,10,25,0.55) 0%, rgba(0,10,25,0.05) 55%);
}
.hero__content{
  padding-top: 6rem;
  padding-bottom: 4rem;
  max-width: 880px;
}
.hero__title{
  font-family: var(--font-display);
  font-weight: 400;
  text-transform: uppercase;
  color: var(--c-white);
  font-size: clamp(2.1rem, 6vw, 4.2rem);
  line-height: 1.08;
  letter-spacing: 0.005em;
  margin-bottom: 1.4rem;
  text-wrap: balance;
}
.hero__subtitle{
  color: rgba(255,255,255,0.88);
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  max-width: 58ch;
  margin-bottom: 2.2rem;
}
.hero__actions{
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}
/* ===========================================================
   SECTIONS (generic)
=========================================================== */
.section{ padding-block: clamp(4rem, 8vw, 7rem); }
.section--soft{ background: var(--c-bg-soft); }
.section--dark{
  background: linear-gradient(160deg, var(--c-navy) 0%, var(--c-navy-2) 100%);
  color: var(--c-white);
}

/* ---------- About ---------- */
.about{
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
  margin-bottom: clamp(4rem, 8vw, 6.5rem);
}
.about__text p{ color: var(--c-ink-soft); }
.about__text .lead{ color: var(--c-navy); margin-bottom: 1rem; }
.about__media img{
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  aspect-ratio: 4/3.1;
  object-fit: cover;
  width: 100%;
}

.purpose__grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.purpose-card{
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 2rem 1.75rem;
  box-shadow: var(--shadow-sm);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}
.purpose-card:hover{ transform: translateY(-6px); box-shadow: var(--shadow-md); }
.purpose-card__icon{
  display: block;
  font-size: 2.6rem;
  line-height: 1;
  color: var(--c-blue);
  margin-bottom: 1.3rem;
}
.purpose-card h3{
  font-family: var(--font-display);
  font-weight: 400;
  text-transform: uppercase;
  font-size: 1.2rem;
  color: var(--c-navy);
  margin-bottom: 0.6rem;
  letter-spacing: 0.01em;
}
.purpose-card p{ color: var(--c-ink-soft); font-size: 0.96rem; }

/* ---------- Services ---------- */
.services{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}
.service-card{
  background: var(--c-white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}
.service-card:hover{ transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.service-card__media{ aspect-ratio: 16/11; overflow: hidden; }
.service-card__media img{ width: 100%; height: 100%; object-fit: cover; transition: transform .5s var(--ease); }
.service-card:hover .service-card__media img{ transform: scale(1.07); }
.service-card__body{ padding: 1.9rem 1.75rem 2.1rem; position: relative; }
.service-card__num{
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 0.95rem;
  color: var(--c-green);
  letter-spacing: 0.08em;
}
.service-card h3{
  font-family: var(--font-display);
  font-weight: 400;
  text-transform: uppercase;
  font-size: 1.28rem;
  color: var(--c-navy);
  margin: 0.5rem 0 0.7rem;
  letter-spacing: 0.005em;
  line-height: 1.2;
}
.service-card p{ color: var(--c-ink-soft); font-size: 0.95rem; }

/* ---------- Steps / Metodología ---------- */
.steps{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.75rem;
  counter-reset: step;
  position: relative;
}
.step{
  position: relative;
  padding: 2.1rem 1.6rem 1.8rem;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  background: var(--c-white);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease), border-color .35s var(--ease);
}
.step:hover{ transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: transparent; }
.step__num{
  position: absolute;
  top: 1.1rem; right: 1.3rem;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.6rem;
  color: var(--c-bg-soft);
  -webkit-text-stroke: 1px var(--c-border);
}
.step__icon{
  display: block;
  font-size: 2.3rem;
  line-height: 1;
  color: var(--c-navy);
  margin-bottom: 1.4rem;
}
.step h3{
  font-family: var(--font-display);
  font-weight: 400;
  text-transform: uppercase;
  font-size: 1.05rem;
  color: var(--c-navy);
  margin-bottom: 0.55rem;
  letter-spacing: 0.005em;
  line-height: 1.25;
}
.step p{ color: var(--c-ink-soft); font-size: 0.92rem; }

/* ---------- Clientes marquee ---------- */
.marquee{
  margin-top: clamp(3rem, 6vw, 4.5rem);
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  -ms-overflow-style: none;
  cursor: grab;
  touch-action: pan-x pan-y pinch-zoom;
  overscroll-behavior-x: contain;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.marquee::-webkit-scrollbar{ display: none; }
.marquee.is-dragging{ cursor: grabbing; scroll-behavior: auto; }
.marquee__track{
  display: flex;
  align-items: center;
  gap: clamp(3rem, 7vw, 6rem);
  width: max-content;
  padding-inline: 1px; /* avoid clipping the first/last logo under the mask */
}
.marquee__track img{
  height: clamp(58px, 9vw, 96px);
  width: auto;
  filter: grayscale(1) opacity(0.55);
  transition: filter .3s var(--ease);
  -webkit-user-drag: none;
  user-select: none;
}
.marquee__track img:hover{ filter: grayscale(0) opacity(1); }

/* ---------- Casos de éxito ---------- */
.cases{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-bottom: clamp(3.5rem, 6vw, 5rem);
}
.case-card{
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform .35s var(--ease), border-color .35s var(--ease), background-color .35s var(--ease);
}
.case-card:hover{ transform: translateY(-6px); border-color: rgba(255,255,255,0.28); background: rgba(255,255,255,0.07); }
.case-card__media{ aspect-ratio: 4/3; overflow: hidden; }
.case-card__media img{ width: 100%; height: 100%; object-fit: cover; }
.case-card__body{ padding: 1.3rem 1.3rem 1.5rem; }
.case-card h3{
  font-family: var(--font-display);
  font-weight: 400;
  text-transform: uppercase;
  font-size: 1.05rem;
  letter-spacing: 0.01em;
  margin-bottom: 0.5rem;
}
.case-card__spec{ color: rgba(255,255,255,0.75); font-size: 0.86rem; margin-bottom: 0.6rem; }
.case-card__badge{
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--c-green);
  background: rgba(76,175,80,0.14);
  border: 1px solid rgba(76,175,80,0.35);
  border-radius: 999px;
  padding: 0.3rem 0.7rem;
  margin: 0;
}

.stats{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  border-top: 1px solid rgba(255,255,255,0.14);
  padding-top: clamp(2.5rem, 5vw, 3.5rem);
  text-align: center;
}
.stat__num{
  display: block;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  line-height: 1;
  color: var(--c-white);
  background: linear-gradient(90deg, #ffffff, #bfe0ff);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.stat__label{
  display: block;
  margin-top: 0.6rem;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.72);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ---------- CTA / Sostenibilidad ---------- */
.cta{
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding-block: clamp(5rem, 12vw, 9rem);
  text-align: center;
}
.cta__media{ position: absolute; inset: 0; z-index: -2; }
.cta__media img{ width: 100%; height: 100%; object-fit: cover; }
.cta__scrim{
  position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(160deg, rgba(0,28,61,0.94), rgba(0,17,38,0.88));
}
.cta__content{ max-width: 760px; }
.cta__title{
  font-family: var(--font-display);
  font-weight: 400;
  text-transform: uppercase;
  color: var(--c-white);
  font-size: clamp(1.9rem, 4.2vw, 3rem);
  line-height: 1.15;
  margin-bottom: 1.2rem;
}
.cta__text{
  color: rgba(255,255,255,0.85);
  font-size: clamp(1rem, 1.5vw, 1.1rem);
  margin-bottom: 2.2rem;
}

/* ===========================================================
   FOOTER
=========================================================== */
.footer{ background: #001120; color: rgba(255,255,255,0.82); }
.footer__inner{
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  padding-block: clamp(3.5rem, 7vw, 5.5rem);
}
.footer__logo{ height: 64px; width: auto; margin-bottom: 1.2rem; }
.footer__brand p{ max-width: 34ch; color: rgba(255,255,255,0.65); font-size: 0.92rem; }
.footer__social{
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin-top: 1.2rem;
  font-weight: 600;
  color: var(--c-white);
  transition: color .3s var(--ease);
}
.footer__social:hover{ color: var(--c-green); }
.footer__col h4{
  font-family: var(--font-display);
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: 1rem;
  color: var(--c-white);
  margin-bottom: 1.3rem;
}
.footer__link{
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.92rem;
  color: rgba(255,255,255,0.72);
  margin-bottom: 0.9rem;
  transition: color .3s var(--ease);
  word-break: break-word;
}
a.footer__link:hover{ color: var(--c-green); }
.footer__link .icon{ color: var(--c-blue); flex-shrink: 0; }

.footer__bottom{ border-top: 1px solid rgba(255,255,255,0.08); }
.footer__bottom-inner{
  padding-block: 1.4rem;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.5);
  text-align: center;
}

/* ---------- WhatsApp FAB ---------- */
.whatsapp-fab{
  position: fixed;
  right: clamp(1rem, 3vw, 1.75rem);
  bottom: clamp(1rem, 3vw, 1.75rem);
  width: 56px; height: 56px;
  border-radius: 50%;
  background: #25D366;
  color: var(--c-white);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 10px 26px rgba(37,211,102,0.45);
  z-index: 900;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.whatsapp-fab .icon{ width: 1.6em; height: 1.6em; }
.whatsapp-fab:hover{ transform: scale(1.08); box-shadow: 0 14px 32px rgba(37,211,102,0.55); }

/* ===========================================================
   SCROLL REVEAL
=========================================================== */
.reveal{
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.reveal.is-visible{ opacity: 1; transform: translateY(0); }

/* ===========================================================
   RESPONSIVE
=========================================================== */
@media (max-width: 1024px){
  .about{ grid-template-columns: 1fr; }
  .about__media{ order: -1; }
  .services{ grid-template-columns: repeat(2, 1fr); }
  .steps{ grid-template-columns: repeat(2, 1fr); }
  .cases{ grid-template-columns: repeat(2, 1fr); }
  .footer__inner{ grid-template-columns: 1fr 1fr; }
  .footer__brand{ grid-column: 1 / -1; }
}

@media (max-width: 860px){
  .nav-toggle{ display: flex; }
  .nav{
    position: fixed;
    top: 0; right: 0;
    height: 100vh;
    width: min(78vw, 340px);
    background: var(--c-navy);
    padding: 6.5rem 2rem 2rem;
    transform: translateX(100%);
    transition: transform .4s var(--ease);
    box-shadow: -20px 0 60px rgba(0,0,0,0.3);
  }
  .nav.is-open{ transform: translateX(0); }
  .nav__list{ flex-direction: column; gap: 1.6rem; }
  .nav__link{ color: var(--c-white); font-size: 1.05rem; }
  .site-header.is-scrolled .nav.is-open .nav__link{ color: var(--c-white); }
  .header__actions{ display: none; }
  body.nav-open{ overflow: hidden; }
}

@media (max-width: 640px){
  .purpose__grid{ grid-template-columns: 1fr; }
  .services{ grid-template-columns: 1fr; }
  .steps{ grid-template-columns: 1fr; }
  .cases{ grid-template-columns: 1fr; }
  .stats{ grid-template-columns: 1fr; gap: 2rem; }
  .footer__inner{ grid-template-columns: 1fr; }
  .hero__actions{ flex-direction: column; align-items: stretch; }
  .hero__actions .btn{ justify-content: center; }
  .hero__content{ padding-top: 5.5rem; }
}

@media (max-width: 400px){
  .section-title{ font-size: clamp(1.5rem, 8vw, 2rem); }
  .hero__title{ font-size: clamp(1.9rem, 9vw, 2.6rem); }
}