/* =========================================================
   Transporte Samuel Zaldívar  ·  Sistema de diseño industrial
   Tema oscuro bloqueado · acento único ámbar #F5B301
   Radios: tarjetas/inputs 12px · botones 8px · chips y FAB = pill
   ========================================================= */

:root{
  --bg:#0E0E0F;
  --bg-2:#131417;
  --surface:#17191E;
  --surface-2:#1E2128;
  --line:rgba(255,255,255,.09);
  --line-2:rgba(255,255,255,.16);
  --text:#F3F4F6;
  --muted:#A7ADB6;
  --amber:#F5B301;
  --amber-2:#FFC62E;
  --ink:#0E0E0F;
  --f-display:"Oswald","Arial Narrow",system-ui,sans-serif;
  --f-body:"Barlow",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --r:12px;      /* tarjetas / inputs */
  --rb:8px;      /* botones */
  --wrap:1200px;
  --pad:clamp(1.1rem,4vw,2rem);
  --shadow:0 18px 40px -20px rgba(0,0,0,.75);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:var(--f-body);font-size:clamp(1rem,.96rem + .2vw,1.075rem);
  line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4{font-family:var(--f-display);font-weight:600;line-height:1.05;margin:0;letter-spacing:.2px}
p{margin:0}

.ic{width:1.25em;height:1.25em;fill:none;flex:none}
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--pad)}

.skip-link{position:fixed;left:1rem;top:-60px;z-index:200;background:var(--amber);color:var(--ink);
  padding:.6rem 1rem;border-radius:var(--rb);font-weight:700;transition:top .2s}
.skip-link:focus{top:1rem}

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

/* ---------- Botones ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  font-family:var(--f-display);font-weight:600;letter-spacing:.4px;text-transform:uppercase;
  font-size:.92rem;padding:.72rem 1.15rem;border-radius:var(--rb);border:2px solid transparent;
  cursor:pointer;transition:transform .15s ease,background .2s ease,border-color .2s,box-shadow .2s;white-space:nowrap}
.btn .ic{width:1.15em;height:1.15em}
.btn:active{transform:translateY(1px)}
.btn-lg{font-size:1.02rem;padding:.9rem 1.5rem}
.btn-block{width:100%}
.btn-wa{background:var(--amber);color:var(--ink);box-shadow:0 10px 24px -12px rgba(245,179,1,.7)}
.btn-wa:hover{background:var(--amber-2);transform:translateY(-2px)}
.btn-outline{background:transparent;color:var(--text);border-color:var(--line-2)}
.btn-outline:hover{border-color:var(--amber);color:var(--amber);transform:translateY(-2px)}

/* ---------- Header ---------- */
#top-sentinel{position:absolute;top:0;height:1px;width:1px}
/* El desenfoque va en un pseudo-elemento: si estuviera en el header, éste se
   volvería el bloque contenedor del menú móvil position:fixed y lo recortaría. */
.site-header{position:sticky;top:0;z-index:100;
  transition:box-shadow .25s,border-color .25s;border-bottom:1px solid transparent}
.site-header::before{content:"";position:absolute;inset:0;z-index:-1;
  background:linear-gradient(180deg,rgba(14,14,15,.9),rgba(14,14,15,.45));
  backdrop-filter:blur(7px);-webkit-backdrop-filter:blur(7px);transition:background .25s}
.site-header.scrolled{border-bottom-color:var(--line);box-shadow:0 8px 30px -18px #000}
.site-header.scrolled::before{background:rgba(12,12,13,.95)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:70px}
.brand{display:flex;align-items:center;gap:.65rem}
.brand-logo{height:44px;width:auto;border-radius:6px}
.brand-txt{display:flex;flex-direction:column;line-height:1;font-family:var(--f-display);letter-spacing:.3px}
.brand-txt strong{font-size:.72rem;text-transform:uppercase;letter-spacing:2.5px;color:var(--muted);font-weight:500}
.brand-txt span{font-size:1.12rem;font-weight:700;color:#fff;text-transform:uppercase}

.nav{display:flex;align-items:center;gap:1.6rem}
.nav>a:not(.btn){font-family:var(--f-display);text-transform:uppercase;letter-spacing:.6px;font-size:.92rem;
  font-weight:500;color:var(--text);padding:.35rem 0;position:relative}
.nav>a:not(.btn)::after{content:"";position:absolute;left:0;bottom:-2px;height:2px;width:0;background:var(--amber);transition:width .22s}
.nav>a:not(.btn):hover{color:#fff}
.nav>a:not(.btn):hover::after{width:100%}
.nav-cta{margin-left:.4rem}
.nav-close{display:none}
.nav-toggle{display:none;background:transparent;border:1px solid var(--line-2);color:#fff;
  width:46px;height:46px;border-radius:var(--rb);align-items:center;justify-content:center;cursor:pointer}
.nav-toggle .ic{width:1.6em;height:1.6em}

/* ---------- Hero ---------- */
.hero{position:relative;min-height:88vh;min-height:88dvh;display:flex;align-items:center;
  padding-block:6rem 4rem;overflow:hidden}
.hero-media{position:absolute;inset:0;z-index:-2}
.hero-media img{width:100%;height:100%;object-fit:cover;object-position:center 40%}
.hero::before{content:"";position:absolute;inset:0;z-index:-1;
  background:linear-gradient(90deg,rgba(9,9,10,.94) 0%,rgba(9,9,10,.78) 42%,rgba(9,9,10,.35) 100%),
             linear-gradient(0deg,rgba(9,9,10,.95),rgba(9,9,10,0) 55%)}
.hero-fade{position:absolute;left:0;right:0;bottom:0;height:120px;z-index:-1;
  background:linear-gradient(0deg,var(--bg),transparent)}
.hero-inner{position:relative;max-width:780px}
.kicker{font-family:var(--f-display);text-transform:uppercase;letter-spacing:3px;font-size:.82rem;
  font-weight:600;color:var(--amber);margin-bottom:1rem;display:flex;align-items:center;gap:.6rem}
.kicker::before{content:"";width:34px;height:3px;background:var(--amber);display:inline-block}
.hero-title{font-size:clamp(2.5rem,6.4vw,4.7rem);font-weight:700;text-transform:uppercase;
  letter-spacing:.5px;color:#fff;text-shadow:0 2px 30px rgba(0,0,0,.5)}
.hero-title span{color:var(--amber)}
.hero-sub{margin-top:1.2rem;max-width:34rem;font-size:1.12rem;color:#E4E7EB}
.hero-cta{margin-top:1.9rem;display:flex;flex-wrap:wrap;gap:.9rem}

/* ---------- Franja de valor ---------- */
.valuebar{background:var(--amber);color:var(--ink);position:relative;overflow:hidden}
.valuebar::before{content:"";position:absolute;inset:0;opacity:.14;
  background:repeating-linear-gradient(-45deg,#000 0 14px,transparent 14px 28px)}
.valuebar-grid{position:relative;display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;padding-block:1.15rem}
.value{display:flex;align-items:center;gap:.7rem;font-weight:600;font-family:var(--f-display);
  text-transform:uppercase;letter-spacing:.4px;font-size:.98rem}
.value .ic{width:1.7em;height:1.7em;stroke-width:1.8}

/* ---------- Secciones ---------- */
.section{padding-block:clamp(3.5rem,7vw,6rem)}
.section-alt{background:var(--bg-2)}
.section-head{max-width:56rem;margin-bottom:2.4rem}
.h-mark{font-size:clamp(1.9rem,4vw,2.9rem);text-transform:uppercase;color:#fff;position:relative;padding-bottom:.7rem}
.h-mark::after{content:"";position:absolute;left:0;bottom:0;width:60px;height:4px;background:var(--amber)}
.section-lead{margin-top:1.1rem;color:var(--muted);font-size:1.1rem;max-width:44rem}

/* ---------- Bento servicios ---------- */
.bento{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem}
.svc{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:1.6rem;
  display:flex;flex-direction:column;gap:.6rem;transition:transform .2s,border-color .2s,background .2s;position:relative;overflow:hidden}
.svc:hover{transform:translateY(-4px);border-color:var(--line-2)}
.svc-ic{width:52px;height:52px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  background:rgba(245,179,1,.12);color:var(--amber);margin-bottom:.3rem}
.svc-ic .ic{width:1.7em;height:1.7em;stroke-width:1.6}
.svc h3{font-size:1.24rem;color:#fff;text-transform:uppercase;letter-spacing:.3px}
.svc p{color:var(--muted);font-size:1rem}
.svc-feature{grid-column:span 2;justify-content:flex-end;min-height:270px;color:#fff;border-color:transparent}
.svc-feature::before{content:"";position:absolute;inset:0;z-index:0;
  background-size:cover;background-position:center;transition:transform .4s}
.svc-maquinaria::before{background-image:url('../img/flota/01-excavadora-case-cx220c.jpg')}
.svc-concreto::before{background-image:url('../img/galeria/obra-4-bombeo.jpg')}
.svc-feature::after{content:"";position:absolute;inset:0;z-index:1;
  background:linear-gradient(180deg,rgba(10,10,11,.15) 0%,rgba(10,10,11,.72) 55%,rgba(10,10,11,.94) 100%)}
.svc-feature:hover::before{transform:scale(1.05)}
.svc-feature>*{position:relative;z-index:2}
.svc-feature .svc-ic{background:var(--amber);color:var(--ink)}
.svc-feature .svc-txt h3{font-size:1.5rem}
.svc-feature .svc-txt p{color:#Dfe2e6;max-width:32rem}

/* ---------- Flota ---------- */
.filters{display:flex;flex-wrap:wrap;gap:.6rem;margin-bottom:2rem}
.filter{background:var(--surface);border:1px solid var(--line-2);color:var(--text);
  font-family:var(--f-display);text-transform:uppercase;letter-spacing:.5px;font-size:.86rem;font-weight:500;
  padding:.55rem 1.1rem;border-radius:999px;cursor:pointer;transition:all .18s}
.filter:hover{border-color:var(--amber);color:var(--amber)}
.filter.is-active{background:var(--amber);border-color:var(--amber);color:var(--ink);font-weight:600}

.fleet-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(255px,1fr));gap:1.1rem}
.fleet-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;
  transition:transform .2s,border-color .2s,box-shadow .2s}
.fleet-card:hover{transform:translateY(-4px);border-color:var(--line-2);box-shadow:var(--shadow)}
.fleet-media{display:block;width:100%;padding:0;border:0;background:#0b0b0c;cursor:zoom-in;position:relative;aspect-ratio:4/3;overflow:hidden}
.fleet-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s}
.fleet-card:hover .fleet-media img{transform:scale(1.06)}
.fleet-media::after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(0,0,0,.28),transparent 45%);opacity:0;transition:opacity .2s}
.fleet-card:hover .fleet-media::after{opacity:1}
.is-product .fleet-media{background:#eceef1}
.is-product .fleet-media img{object-fit:contain;padding:1.2rem}
.is-product:hover .fleet-media img{transform:scale(1.03)}
.fleet-body{padding:1rem 1.1rem 1.2rem}
.fleet-tag{display:inline-block;font-family:var(--f-display);text-transform:uppercase;letter-spacing:1px;
  font-size:.7rem;font-weight:600;color:var(--amber);margin-bottom:.35rem}
.fleet-body h3{font-size:1.08rem;color:#fff;text-transform:uppercase;letter-spacing:.2px;line-height:1.15}
.fleet-card[hidden]{display:none}
.fleet-note{margin-top:2rem;text-align:center;color:var(--muted)}
.fleet-note a{color:var(--amber);font-weight:600;text-decoration:underline;text-underline-offset:3px}

/* ---------- Nosotros ---------- */
.about{display:grid;grid-template-columns:1fr 1fr;gap:clamp(1.5rem,4vw,3.5rem);align-items:center}
.about-media{position:relative;border-radius:var(--r);overflow:hidden;border:1px solid var(--line)}
.about-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.about-badge{position:absolute;left:1rem;bottom:1rem;background:var(--amber);color:var(--ink);
  font-family:var(--f-display);font-weight:600;letter-spacing:.5px;font-size:.78rem;padding:.4rem .8rem;border-radius:6px}
.about-txt p{color:var(--muted);margin-top:1rem}
.about-txt .about-vision{color:var(--text)}
.about-txt .about-vision strong{color:var(--amber)}
.values{list-style:none;margin:1.6rem 0 0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:.7rem}
.values li{display:flex;align-items:center;gap:.55rem;font-family:var(--f-display);text-transform:uppercase;
  letter-spacing:.5px;font-weight:500;font-size:.98rem}
.values .ic{width:1.3em;height:1.3em;color:var(--amber)}

/* ---------- Galería ---------- */
.gallery{columns:3;column-gap:1rem}
.gal-item{break-inside:avoid;margin:0 0 1rem;padding:0;border:1px solid var(--line);border-radius:var(--r);
  overflow:hidden;cursor:zoom-in;background:#0b0b0c;width:100%;display:block;position:relative}
.gal-item img{width:100%;transition:transform .35s,filter .3s;filter:saturate(.96)}
.gal-item:hover img{transform:scale(1.05);filter:saturate(1.08)}
.gal-item::after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(245,179,1,.16),transparent 60%);opacity:0;transition:opacity .2s}
.gal-item:hover::after{opacity:1}

/* ---------- Contacto ---------- */
.contact{display:grid;grid-template-columns:1.3fr .9fr;gap:clamp(1.5rem,4vw,3rem);align-items:start}
.form{margin-top:1.6rem;display:grid;gap:1.05rem}
.field{display:grid;gap:.4rem}
.field label{font-family:var(--f-display);text-transform:uppercase;letter-spacing:.7px;font-size:.82rem;
  font-weight:500;color:#D7DbE0}
.field input,.field select,.field textarea{
  background:var(--surface-2);border:1px solid var(--line-2);color:var(--text);border-radius:var(--r);
  padding:.8rem .9rem;font-family:var(--f-body);font-size:1rem;width:100%;transition:border-color .18s,box-shadow .18s}
.field textarea{resize:vertical;min-height:110px}
.field input::placeholder,.field textarea::placeholder{color:#7f858e}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--amber);
  box-shadow:0 0 0 3px rgba(245,179,1,.22)}
.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--amber) 50%),linear-gradient(135deg,var(--amber) 50%,transparent 50%);
  background-position:calc(100% - 20px) center,calc(100% - 14px) center;background-size:6px 6px,6px 6px;background-repeat:no-repeat;padding-right:2.4rem}
.form-hint{color:var(--muted);font-size:.9rem;text-align:center;margin-top:-.2rem}

.contact-info{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:1.6rem;
  position:relative;overflow:hidden}
.contact-info::before{content:"";position:absolute;left:0;top:0;height:100%;width:4px;background:var(--amber)}
.contact-info h3{font-size:1.3rem;text-transform:uppercase;color:#fff;margin-bottom:1.2rem}
.cinfo{display:flex;align-items:center;gap:.9rem;padding:.75rem 0;border-bottom:1px solid var(--line);color:var(--text)}
.cinfo:last-of-type{border-bottom:0}
.cinfo .ic{width:1.7em;height:1.7em;color:var(--amber);flex:none}
.cinfo span{display:flex;flex-direction:column;line-height:1.25}
.cinfo small{color:var(--muted);font-size:.78rem;text-transform:uppercase;letter-spacing:1px}
.cinfo strong{font-size:1.08rem;color:#fff;font-weight:600}
.cinfo-wa{border-radius:var(--rb);background:rgba(245,179,1,.1);border:1px solid rgba(245,179,1,.3);
  padding:.85rem .9rem;margin-bottom:.4rem}
.cinfo-wa:hover{background:rgba(245,179,1,.16)}
.cinfo-rtn{margin-top:1.2rem;color:var(--muted);font-size:.85rem;letter-spacing:.5px}

/* ---------- Footer ---------- */
.site-footer{background:#0A0A0B;border-top:1px solid var(--line)}
.site-footer::before{content:"";display:block;height:4px;
  background:repeating-linear-gradient(-45deg,var(--amber) 0 22px,#0A0A0B 22px 44px)}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:2rem;padding-block:3rem}
.footer-logo{height:56px;width:auto;border-radius:6px;margin-bottom:.9rem}
.footer-slogan{font-family:var(--f-display);text-transform:uppercase;letter-spacing:.5px;color:var(--amber);font-weight:600}
.footer-desc{color:var(--muted);margin-top:.5rem;max-width:26rem;font-size:.98rem}
.footer-nav,.footer-contact{display:flex;flex-direction:column;gap:.6rem}
.footer-grid h4{font-size:.85rem;text-transform:uppercase;letter-spacing:2px;color:#fff;margin-bottom:.3rem}
.footer-nav a,.footer-contact a,.footer-contact p{color:var(--muted);display:flex;align-items:center;gap:.5rem;transition:color .18s}
.footer-nav a:hover,.footer-contact a:hover{color:var(--amber)}
.footer-contact .ic{width:1.2em;height:1.2em;color:var(--amber)}
.footer-rtn{font-size:.85rem;letter-spacing:.5px}
.footer-bottom{border-top:1px solid var(--line);padding-block:1.1rem}
.footer-bottom .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:.5rem;color:var(--muted);font-size:.86rem}

/* ---------- WhatsApp flotante ---------- */
.wa-float{position:fixed;right:1.1rem;bottom:1.1rem;z-index:90;width:58px;height:58px;border-radius:50%;
  background:var(--amber);color:var(--ink);display:flex;align-items:center;justify-content:center;
  box-shadow:0 12px 30px -8px rgba(245,179,1,.6);transition:transform .2s}
.wa-float .ic{width:1.9em;height:1.9em}
.wa-float:hover{transform:scale(1.08)}
.wa-float::after{content:"";position:absolute;inset:0;border-radius:50%;border:2px solid var(--amber);animation:pulse 2.4s ease-out infinite}
@keyframes pulse{0%{transform:scale(1);opacity:.7}100%{transform:scale(1.7);opacity:0}}

/* ---------- Lightbox ---------- */
.lightbox{position:fixed;inset:0;z-index:150;background:rgba(6,6,7,.94);display:flex;align-items:center;justify-content:center;padding:1.4rem}
.lightbox[hidden]{display:none}
.lb-figure{margin:0;max-width:min(960px,94vw);max-height:90vh;display:flex;flex-direction:column;align-items:center;gap:.8rem}
.lb-figure img{max-width:100%;max-height:80vh;object-fit:contain;border-radius:var(--r);border:1px solid var(--line-2)}
.lb-figure figcaption{font-family:var(--f-display);text-transform:uppercase;letter-spacing:1px;color:#fff;font-size:1.05rem}
.lb-close{position:absolute;top:1rem;right:1rem;width:48px;height:48px;border-radius:50%;
  background:rgba(255,255,255,.1);border:1px solid var(--line-2);color:#fff;cursor:pointer;
  display:flex;align-items:center;justify-content:center;transition:background .2s}
.lb-close:hover{background:var(--amber);color:var(--ink)}
.lb-close .ic{width:1.5em;height:1.5em}

/* ---------- Reveal (guarda no-js: sin JavaScript, todo queda visible) ---------- */
.reveal{transition:opacity .6s ease,transform .6s cubic-bezier(.16,1,.3,1)}
.js .reveal{opacity:0;transform:translateY(26px)}
.reveal.in{opacity:1;transform:none}

/* ========================================================
   RESPONSIVE
   ======================================================== */
@media (max-width:1024px){
  .bento{grid-template-columns:repeat(2,1fr)}
  .svc-feature{grid-column:span 2}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:820px){
  .nav{position:fixed;inset:0 0 0 auto;width:min(320px,82vw);flex-direction:column;align-items:stretch;
    justify-content:flex-start;gap:.4rem;background:#101114;border-left:1px solid var(--line);
    padding:5rem 1.4rem 2rem;transform:translateX(105%);transition:transform .3s ease;box-shadow:-20px 0 50px -20px #000}
  .nav.open{transform:none}
  .nav>a:not(.btn){padding:.85rem .2rem;border-bottom:1px solid var(--line);font-size:1.05rem}
  .nav>a:not(.btn)::after{display:none}
  .nav-cta{margin-top:1rem}
  .nav-close{display:flex;position:absolute;top:1rem;right:1rem;width:44px;height:44px;border-radius:var(--rb);
    background:transparent;border:1px solid var(--line-2);color:#fff;align-items:center;justify-content:center;cursor:pointer}
  .nav-close .ic{width:1.5em;height:1.5em}
  .nav-toggle{display:flex}
  body.nav-open{overflow:hidden}
  .contact{grid-template-columns:1fr}
  .about{grid-template-columns:1fr}
  .about-media{order:-1}
}
@media (max-width:720px){
  .valuebar-grid{grid-template-columns:1fr;gap:.5rem;padding-block:1rem}
  .value{font-size:.92rem}
  .gallery{columns:2}
  .hero{min-height:auto;padding-block:5.5rem 3.5rem}
  .hero-title{font-size:clamp(2.3rem,9vw,3.2rem)}
}
@media (max-width:520px){
  .bento{grid-template-columns:1fr}
  .svc-feature{grid-column:span 1;min-height:230px}
  .values{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom .wrap{flex-direction:column}
  .hero-cta .btn{width:100%}
  .brand-txt strong{font-size:.62rem}
  .brand-txt span{font-size:.98rem}
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion:reduce){
  .reveal,.js .reveal{opacity:1;transform:none;transition:none}
  .wa-float::after{animation:none}
  *{transition-duration:.01ms !important;animation-duration:.01ms !important;animation-iteration-count:1 !important}
}