:root{
  /* Neutrales base */
  --bg:#0a0c10;
  --card:#0f141a;
  --text:#e9eef5;
  --muted:#a6b2bf;

  /* Marca / acentos */
  --brand:#0c2e63;
  --accent:#4fa6ff;
  --accent-2:#2b6bcf;

  --concrete:#6a5b53;
  --radius:16px;
  --shadow:0 10px 30px rgba(0,0,0,.25);
}

*{box-sizing:border-box}
html,body{
  height:100%;
  max-width:100%;
  overflow-x:hidden;
}
body{
  margin:0;
  font-family:Manrope,system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,"Helvetica Neue",Arial,"Noto Sans",sans-serif;
  background:linear-gradient(180deg,var(--bg), #0c1118 40%);
  color:var(--text);
}

/* Top nav */
.nav{
  position:sticky; top:0; z-index:50;
  display:flex; align-items:center; justify-content:space-between;
  padding:12px 20px;
  background:rgba(10,14,20,.72);
  backdrop-filter:saturate(140%) blur(10px);
  border-bottom:1px solid rgba(255,255,255,.06);
  transition:background .25s ease, border-color .25s ease, transform .2s ease;
}
.nav.scrolled{ background:rgba(10,14,20,.92); border-bottom-color:rgba(255,255,255,.08); }
.nav a{color:var(--text); text-decoration:none; opacity:.92}
.nav a:hover{opacity:1}
.brand{display:flex; gap:10px; align-items:center; font-weight:800; letter-spacing:.3px}
.logo{height:38px; width:auto; filter:drop-shadow(0 2px 6px rgba(0,0,0,.4))}
.logo.sm{height:28px}
.nav nav{display:flex; gap:18px; align-items:center}
.nav nav a{ position:relative; padding-bottom:4px; font-weight:700; letter-spacing:.2px; }
.nav nav a::after{
  content:""; position:absolute; left:0; right:0; bottom:-2px; height:2px;
  background:linear-gradient(90deg, var(--accent), var(--accent-2));
  transform:scaleX(0); transform-origin:left; transition:transform .22s ease; border-radius:3px;
}
.nav nav a:hover::after,.nav nav a.active::after{ transform:scaleX(1); }

.btn{
  display:inline-block; padding:12px 18px; border-radius:999px;
  border:1px solid rgba(255,255,255,.16); text-decoration:none; font-weight:700
}
.btn-primary{ background:#ffffff; color:var(--brand); border:none; box-shadow:var(--shadow) }
.btn-primary:hover{ background:var(--brand); color:#fff }
.btn-ghost{ background:transparent; color:#fff; border:1px solid rgba(255,255,255,.28) }
.btn-ghost:hover{ border-color:#fff }

.burger{display:none; background:transparent; border:0; padding:8px}
.burger span{display:block; width:24px; height:2px; margin:5px 0; background:#fff}

/* Hero */
.hero{
  position:relative;
  min-height:68svh;
  display:grid;
  align-items:stretch;
  overflow:hidden;
}
.hero-video{
  position:absolute; inset:0;
  width:100%; height:100%;
  object-fit:cover;
  z-index:-2;
}
.hero-overlay{
  position:absolute; inset:0; z-index:-1;
  background:linear-gradient(90deg, rgba(6,10,16,.75) 0%, rgba(6,10,16,.45) 45%, rgba(6,10,16,.15) 100%);
}
.hero-content{
  max-width:1100px;
  margin:0 auto;
  padding:72px 20px;
}
.headline-box{
  display:inline-block; padding:16px 22px; border:2px solid #fff; border-radius:18px;
  box-shadow:0 10px 28px rgba(0,0,0,.35), inset 0 0 0 1px rgba(255,255,255,.15);
  backdrop-filter:saturate(150%) blur(4px);
}
.headline-box h1{
  margin:0;
  line-height:1.02;
  color:#fff;
  font-size:clamp(32px,4.8vw,60px);
}
.hero p{
  max-width:760px;
  font-size:clamp(16px,1.6vw,18px);
  color:var(--text);
  opacity:.9;
  margin-top:14px;
}

.cta{display:flex; gap:12px; margin:20px 0 10px}
.badges{display:flex; gap:14px; padding:0; margin:12px 0 0; list-style:none; flex-wrap:wrap}
.badges li{ background:rgba(0,0,0,.38); padding:8px 12px; border-radius:999px; border:1px solid rgba(255,255,255,.12) }

/* Sections */
.section{
  max-width:1100px;
  margin:64px auto;
  padding:0 20px;
}
.section h2{font-size:clamp(26px,3.6vw,36px); margin:0 0 10px}
.muted{color:var(--muted)}
.cards{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:18px;
  margin-top:22px;
}
.card{
  background:var(--card);
  border:1px solid rgba(255,255,255,.07);
  border-radius:var(--radius);
  padding:22px;
  box-shadow:var(--shadow);
}
.card h3{margin:0 0 8px; color:#fff}
.card ul{padding-left:18px; color:var(--muted)}

/* About */
.two-col{
  display:grid;
  grid-template-columns:1.2fr .8fr;
  gap:26px;
  align-items:start;
}
.stats{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:12px;
}
.stats div{
  background:var(--card);
  border:1px solid rgba(255,255,255,.07);
  border-radius:var(--radius);
  padding:22px;
  text-align:center;
}
.stats span{
  display:block;
  font-weight:900;
  font-size:28px;
  color:#fff;
}

/* Gallery */
.gallery{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:10px;
  margin-top:18px;
}
.gallery a{
  display:block;
  border-radius:12px;
  overflow:hidden;
  border:1px solid rgba(255,255,255,.08);
}
.gallery img{
  width:100%;
  height:220px;
  object-fit:cover;
  transform:scale(1.02);
  transition:transform .3s ease, filter .3s;
}
.gallery img:hover{transform:scale(1.06); filter:contrast(1.06)}

dialog#lightbox{
  border:none;
  padding:0;
  background:rgba(0,0,0,.85);
}
dialog#lightbox::backdrop{
  background:rgba(0,0,0,.65);
}
dialog#lightbox img{
  max-width:92vw;
  max-height:86svh;
  display:block;
  margin:auto;
}
dialog .close{
  position:fixed;
  top:20px;
  right:20px;
}

/* Form */
.form{
  background:var(--card);
  border:1px solid rgba(255,255,255,.08);
  border-radius:var(--radius);
  padding:22px;
  box-shadow:var(--shadow);
}
.form label{display:block; font-weight:700; margin:12px 0}
.form input,.form textarea,.form select{
  width:100%;
  margin-top:6px;
  padding:12px 14px;
  border-radius:12px;
  border:1px solid rgba(255,255,255,.14);
  background:#0c121a;
  color:var(--text);
}
.form input:focus,.form textarea:focus,.form select:focus{
  outline:2px solid var(--accent);
  border-color:transparent;
}
.grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:12px;
}
.form-foot{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  margin-top:12px;
}
#formMsg{display:block; margin-top:10px}

/* Footer */
.footer{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  max-width:1100px;
  margin:60px auto 30px;
  padding:0 20px;
  color:var(--muted);
}
.foot-links{display:flex; gap:14px}

/* Responsive layout */
@media (max-width:900px){
  .cards{grid-template-columns:1fr}
  .two-col{grid-template-columns:1fr}
  .gallery{grid-template-columns:repeat(2,1fr)}
  .grid{grid-template-columns:1fr}
  .nav nav{display:none}
  .burger{display:block}
  .nav.open nav{
    display:flex;
    position:absolute;
    right:12px;
    top:64px;
    flex-direction:column;
    gap:8px;
    background:#0c1118;
    padding:12px;
    border:1px solid rgba(255,255,255,.1);
    border-radius:12px;
    max-width:70vw;
  }
  .cta{
    flex-direction:column;
    align-items:flex-start;
  }
}

/* Socials */
.socials{
  margin-top:20px;
  display:flex;
  gap:14px;
  align-items:center;
  flex-wrap:wrap;
}
.socials p{
  margin:0 6px 0 0;
  color:var(--muted);
  font-size:14px;
}
.social-icon{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:44px;
  height:44px;
  border-radius:50%;
  background:#1b2330;
  color:white;
  font-size:22px;
  transition:all .2s ease;
  border:1px solid rgba(255,255,255,.08);
}
.social-icon:hover{transform:scale(1.08);opacity:.9}
.social-icon .fa-whatsapp{color:#25D366}
.social-icon .fa-instagram{color:#E1306C}
.nav .social-icon.sm{
  width:34px;
  height:34px;
  font-size:18px;
  margin-left:6px;
}
.nav .btn { opacity:1; }
.nav .btn-primary{
  background:linear-gradient(180deg, var(--accent), var(--accent-2));
  color:#fff; border:none;
  box-shadow:0 6px 18px rgba(47,124,255,.35), inset 0 1px 0 rgba(255,255,255,.18);
  padding:10px 18px; font-weight:800; border-radius:999px;
}
.nav .btn-primary:hover{ filter:brightness(1.08); transform:translateY(-1px); }
.nav .btn-primary:active{ transform:translateY(0); filter:brightness(1.0); }

input[type="date"]::-webkit-calendar-picker-indicator,
input[type="time"]::-webkit-calendar-picker-indicator { filter: invert(1); }

/* Toggle Shotcrete */
.switch-label{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  font-weight:700;
  cursor:pointer;
  user-select:none;
}
.switch-label input{ display:none; }
.switch-label .slider{
  position:relative;
  width:50px;
  height:26px;
  background:#555;
  border-radius:999px;
  transition:background .3s ease;
}
.switch-label .slider::before{
  content:"";
  position:absolute;
  top:3px; left:3px;
  width:20px; height:20px;
  background:#fff;
  border-radius:50%;
  transition:transform .3s ease;
}
.switch-label input:checked + .slider{ background:var(--accent); }
.switch-label input:checked + .slider::before{ transform:translateX(24px); }

/* Shotcrete segmented */
.field{display:flex; flex-direction:column; gap:6px}
.field .label{font-weight:700}
.segmented{
  display:inline-flex;
  align-items:center;
  gap:2px;
  background:#0c121a;
  border:1px solid rgba(255,255,255,.14);
  border-radius:999px;
  padding:4px;
}
.segmented input{position:absolute; opacity:0; pointer-events:none}
.segmented label{
  padding:8px 14px;
  border-radius:999px;
  cursor:pointer;
  font-weight:800;
  letter-spacing:.2px;
  user-select:none;
  color:var(--muted);
  transition:background .25s ease, color .25s ease, transform .12s ease;
}
.segmented input:checked + label{
  background:var(--accent);
  color:#fff;
  box-shadow:0 6px 20px rgba(62,148,255,.35);
}
.segmented label:hover{transform:translateY(-1px)}
.segmented label:active{transform:translateY(0)}
.segmented label:focus-visible,.segmented input:focus + label{
  outline:2px solid var(--accent);
  outline-offset:2px;
  border-radius:999px;
}
@media (max-width:900px){ .field{margin-top:6px} }

/* Before & After */
.ba-gallery{
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(280px, 1fr));
  gap:20px;
  margin-top:24px;
}
.ba-pair{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:10px;
}
.ba-pair figure{
  margin:0;
  text-align:center;
}
.ba-pair img{
  width:100%;
  height:220px;
  object-fit:cover;
  border-radius:12px;
  border:1px solid rgba(255,255,255,.1);
  box-shadow:0 4px 12px rgba(0,0,0,.4);
  transition:transform .3s ease;
}
.ba-pair img:hover{ transform:scale(1.05); }
.ba-pair figcaption{
  margin-top:6px;
  font-size:14px;
  color:var(--muted);
  text-transform:uppercase;
  letter-spacing:.5px;
}

/* Service cards: botón + animación */
.service-card{
  position:relative;
  cursor:pointer;
  transition: transform .28s ease, box-shadow .28s ease, border-color .28s ease, background .28s ease, opacity .28s ease;
  border:1px solid rgba(255,255,255,.10);
  will-change:transform;
  opacity:0;
  transform:translateY(18px) scale(.98);
}
.service-card::after{
  content:"";
  position:absolute;
  inset:0;
  border-radius:var(--radius);
  box-shadow:0 0 0 0 rgba(79,166,255,0);
  transition:box-shadow .28s ease;
  pointer-events:none;
}

/* Hover solo en dispositivos con puntero (desktop) */
@media (hover:hover){
  .service-card:hover,
  .service-card:focus-within{
    transform:translateY(-2px) scale(1.03);
    box-shadow:0 14px 34px rgba(0,0,0,.35);
    border-color:rgba(255,255,255,.22);
  }
  .service-card:hover::after,
  .service-card:focus-within::after{
    box-shadow:0 0 0 2px rgba(79,166,255,.55);
  }
}

.service-card:active{ transform:translateY(0) scale(.997); }
.service-card.reveal{ opacity:1; transform:translateY(0) scale(1); }

@media (prefers-reduced-motion:reduce){
  .service-card,
  .service-card::after{ transition:none !important; }
}

/* Móvil: lista vertical limpia (sin carrusel) */
@media (max-width:900px){
  .cards{
    grid-template-columns:1fr;
    gap:16px;
    overflow:visible;
    padding-bottom:0;
  }
  .cards .service-card{ transform-origin:center; }
}

.service-card:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:2px;
  border-radius:var(--radius);
}
/* Fondo sólido para la sección de Services, para que no se vea blanco al hacer scroll */
#services{
  position: relative;
  z-index: 1;
  background-color: #020617; /* oscuro, mismo tono del resto de la página */
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0,0,0,.35);
}

/* En móvil, que no se vea pegado al borde */
@media (max-width:900px){
  #services{
    margin-left: 12px;
    margin-right: 12px;
  }
}