/* ===========================================================
   J&A ENCOFRADOS · ESTRUCTURAS · EXCAVACIONES
   Sistema de diseño — ver notas en README.txt
   =========================================================== */

:root{
  /* color */
  --graphite:   #1B1A17;
  --graphite-2: #242220;
  --graphite-3: #302D28;
  --paper:      #F4F0E6;
  --paper-2:    #EAE3D3;
  --ink:        #201E1A;
  --concrete:   #8D8779;
  --concrete-2: #B9B2A0;
  --mustard:    #D69A2D;
  --mustard-2:  #F0B546;
  --rust:       #93392A;
  --white:      #FFFFFF;

  /* type */
  --font-display: 'Oswald', sans-serif;
  --font-body: 'Work Sans', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  --container: 1180px;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:600;
  text-transform:uppercase;
  letter-spacing:.01em;
  line-height:1.08;
  margin:0 0 .5em;
  color:var(--ink);
}
p{margin:0 0 1em;}
.container{
  max-width:var(--container);
  margin:0 auto;
  padding:0 28px;
}
:focus-visible{outline:2px solid var(--mustard);outline-offset:3px;}
@media (prefers-reduced-motion: reduce){
  *{animation-duration:0.01ms !important;animation-iteration-count:1 !important;transition-duration:0.01ms !important;scroll-behavior:auto !important;}
}

/* ---------- eyebrow / dimension-line signature ---------- */
.dim{
  display:flex;
  align-items:center;
  gap:0;
  margin-bottom:22px;
  color:var(--mustard);
}
.dim .tick{width:1px;height:14px;background:currentColor;flex-shrink:0;}
.dim .rule{flex:1;height:1px;background:currentColor;min-width:16px;}
.dim .label{
  padding:0 12px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
  white-space:nowrap;
  color:inherit;
}
.dim--start{justify-content:flex-start;}
.dim--start .rule:first-of-type{flex:0 0 20px;}
section.on-dark .dim{color:var(--mustard-2);}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:14px 26px;
  font-family:var(--font-display);
  font-weight:600;
  font-size:15px;
  text-transform:uppercase;
  letter-spacing:.04em;
  border:1px solid transparent;
  cursor:pointer;
  transition:background .15s ease, color .15s ease, border-color .15s ease;
}
.btn-primary{background:var(--mustard);color:var(--graphite);}
.btn-primary:hover{background:var(--mustard-2);}
.btn-ghost{border-color:currentColor;color:var(--paper);background:transparent;}
.btn-ghost:hover{background:rgba(244,240,230,.08);}
.btn-ghost-dark{border-color:var(--ink);color:var(--ink);background:transparent;}
.btn-ghost-dark:hover{background:var(--ink);color:var(--paper);}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:var(--graphite);
  border-bottom:1px solid var(--graphite-3);
}
.site-header .container{
  display:flex;align-items:center;justify-content:flex-start;gap:20px;
  padding-top:16px;padding-bottom:16px;
}
.logo{display:flex;flex-direction:column;line-height:1;margin-right:auto;}
.logo-mark{
  font-family:var(--font-display);
  font-size:28px;font-weight:700;letter-spacing:.03em;
  color:var(--paper);
}
.logo-mark .amp{color:var(--mustard);}
.logo-sub{
  font-family:var(--font-mono);
  font-size:10px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--concrete-2);margin-top:5px;
}
.nav-links{display:flex;align-items:center;gap:34px;}
.nav-links a{
  font-family:var(--font-display);
  font-size:14px;font-weight:500;text-transform:uppercase;letter-spacing:.05em;
  color:var(--paper-2);
  padding:6px 0;border-bottom:2px solid transparent;
  transition:color .15s ease, border-color .15s ease;
}
.nav-links a:hover,.nav-links a.active{color:var(--mustard-2);border-color:var(--mustard);}
.nav-cta{margin-left:8px;}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:6px;}
.nav-toggle span{display:block;width:26px;height:2px;background:var(--paper);margin:5px 0;}

.lang-switch{display:flex;align-items:center;gap:7px;flex-shrink:0;}
.lang-btn{
  width:28px;height:20px;padding:0;
  border:1.5px solid transparent;border-radius:2px;
  background:none;cursor:pointer;overflow:hidden;
  opacity:.5;line-height:0;
  transition:opacity .15s ease, border-color .15s ease;
}
.lang-btn svg{width:100%;height:100%;display:block;}
.lang-btn:hover{opacity:.85;}
.lang-btn.active{opacity:1;border-color:var(--mustard);}

@media (max-width:900px){
  .nav-toggle{display:block;}
  .nav-links{
    position:absolute;top:100%;left:0;right:0;
    background:var(--graphite);
    flex-direction:column;align-items:flex-start;gap:0;
    max-height:0;overflow:hidden;
    transition:max-height .25s ease;
    border-bottom:1px solid var(--graphite-3);
  }
  .nav-links.open{max-height:420px;}
  .nav-links a{width:100%;padding:16px 28px;border-bottom:1px solid var(--graphite-3);}
  .nav-links a.active,.nav-links a:hover{border-bottom-color:var(--graphite-3);}
  .nav-cta{margin:16px 28px;}
}

/* ---------- hero ---------- */
.hero{
  position:relative;
  min-height:86vh;
  display:flex;align-items:flex-end;
  color:var(--paper);
  overflow:hidden;
}
.hero-media{position:absolute;inset:0;z-index:0;}
.hero-media img{width:100%;height:100%;object-fit:cover;}
.hero-media::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(0deg, rgba(15,14,12,.92) 0%, rgba(15,14,12,.55) 46%, rgba(15,14,12,.28) 100%);
}
.hero-content{position:relative;z-index:1;padding:80px 0 64px;width:100%;}
.hero-eyebrow{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--mustard-2);margin-bottom:18px;display:flex;align-items:center;gap:10px;
}
.hero h1{
  font-size:clamp(2.4rem,5.4vw,4.4rem);
  color:var(--white);
  max-width:16ch;
  margin-bottom:.4em;
}
.hero p.lede{
  max-width:52ch;color:var(--paper-2);font-size:1.15rem;margin-bottom:2em;
}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;}
.hero-tags{
  position:absolute;right:28px;bottom:64px;z-index:1;
  font-family:var(--font-mono);font-size:12px;color:var(--concrete-2);
  text-align:right;display:none;
}
@media (min-width:900px){.hero-tags{display:block;}}

/* ---------- sections ---------- */
section{padding:96px 0;}
section.tight{padding:64px 0;}
section.on-dark{background:var(--graphite);color:var(--paper);}
section.on-dark h2,section.on-dark h3{color:var(--paper);}
section.on-paper2{background:var(--paper-2);}
.section-head{max-width:640px;margin-bottom:52px;}
.section-head h2{font-size:clamp(1.9rem,3.4vw,2.7rem);}
.section-head p{color:var(--concrete);font-size:1.05rem;max-width:56ch;}
section.on-dark .section-head p{color:var(--concrete-2);}

/* ---------- intro / about teaser ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center;}
@media (max-width:860px){.split{grid-template-columns:1fr;gap:36px;}}
.split img{width:100%;height:520px;object-fit:cover;}
.stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-top:40px;}
@media (max-width:640px){.stat-row{grid-template-columns:1fr 1fr;}}
.stat{border-top:1px solid var(--graphite-3);padding-top:14px;}
section:not(.on-dark) .stat{border-top:1px solid var(--concrete-2);}
.stat .num{font-family:var(--font-display);font-size:2.6rem;color:var(--mustard);line-height:1;}
.stat .lbl{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--concrete);margin-top:8px;}
section.on-dark .stat .lbl{color:var(--concrete-2);}

/* ---------- service cards ---------- */
.card-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--concrete-2);}
@media (max-width:980px){.card-grid{grid-template-columns:1fr 1fr;}}
@media (max-width:560px){.card-grid{grid-template-columns:1fr;}}
.service-card{
  background:var(--paper);padding:36px 30px;min-height:300px;
  display:flex;flex-direction:column;
}
.service-card .idx{font-family:var(--font-mono);font-size:12px;color:var(--mustard);letter-spacing:.1em;margin-bottom:22px;}
.service-card h3{font-size:1.3rem;margin-bottom:12px;}
.service-card p{color:var(--concrete);font-size:.96rem;flex:1;}
.service-card .tag-list{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}
.service-card .tag-list span{
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.06em;
  border:1px solid var(--concrete-2);padding:4px 9px;color:var(--concrete);
  text-transform:uppercase;
}

/* ---------- gallery ---------- */
.gallery{
  display:grid;grid-template-columns:repeat(3,1fr);gap:18px;
}
@media (max-width:900px){.gallery{grid-template-columns:repeat(2,1fr);}}
@media (max-width:560px){.gallery{grid-template-columns:1fr;}}
.gallery-item{position:relative;overflow:hidden;background:var(--graphite);cursor:default;}
.gallery-item img{
  width:100%;height:340px;object-fit:cover;
  transition:transform .5s ease;
  filter:saturate(.92) contrast(1.04);
}
.gallery-item:hover img{transform:scale(1.045);}
.gallery-item.tall img{height:520px;}
.gallery-caption{
  position:absolute;left:0;right:0;bottom:0;
  padding:16px 18px 14px;
  background:linear-gradient(0deg, rgba(15,14,12,.88), rgba(15,14,12,0));
  color:var(--paper);
}
.gallery-caption .cap-label{
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--mustard-2);
  margin-bottom:4px;display:block;
}
.gallery-caption .cap-title{font-family:var(--font-display);font-size:1.05rem;text-transform:none;letter-spacing:0;}

/* ---------- values list ---------- */
.value-list{display:grid;grid-template-columns:repeat(3,1fr);gap:40px;margin-top:8px;}
@media (max-width:820px){.value-list{grid-template-columns:1fr;gap:32px;}}
.value-item .dim{margin-bottom:14px;}
.value-item h3{font-size:1.15rem;margin-bottom:10px;}
.value-item p{color:var(--concrete);font-size:.96rem;}

/* ---------- CTA band ---------- */
.cta-band{
  background:var(--graphite);color:var(--paper);
  padding:80px 0;text-align:center;
}
.cta-band h2{color:var(--white);font-size:clamp(1.8rem,3.6vw,2.6rem);max-width:20ch;margin:0 auto .3em;}
.cta-band p{color:var(--concrete-2);max-width:48ch;margin:0 auto 34px;}
.cta-actions{display:flex;justify-content:center;gap:16px;flex-wrap:wrap;}

/* ---------- forms ---------- */
.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:64px;}
@media (max-width:900px){.contact-grid{grid-template-columns:1fr;gap:48px;}}
.field{margin-bottom:20px;}
.field label{
  display:block;font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--concrete);margin-bottom:8px;
}
.field input,.field textarea,.field select{
  width:100%;padding:13px 14px;
  background:var(--paper);
  border:1px solid var(--concrete-2);
  font-family:var(--font-body);font-size:15px;color:var(--ink);
}
.field textarea{resize:vertical;min-height:130px;}
.field input:focus,.field textarea:focus,.field select:focus{border-color:var(--mustard);}
.row-2{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
@media (max-width:560px){.row-2{grid-template-columns:1fr;}}
.form-note{font-size:.85rem;color:var(--concrete);margin-top:10px;}

.info-block{margin-bottom:34px;}
.info-block .dim{margin-bottom:16px;}
.info-line{display:flex;gap:14px;padding:14px 0;border-top:1px solid var(--concrete-2);}
.info-line:last-child{border-bottom:1px solid var(--concrete-2);}
.info-line .k{font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--concrete);width:110px;flex-shrink:0;padding-top:2px;}
.info-line .v{font-family:var(--font-display);font-size:1.05rem;text-transform:none;}
.info-line .v a:hover{color:var(--rust);}
.map-frame{width:100%;height:280px;border:0;filter:grayscale(.35) contrast(1.05);margin-top:8px;}

/* ---------- whatsapp flotante ---------- */
.whatsapp-float{
  position:fixed;
  right:22px;bottom:22px;
  z-index:200;
  width:58px;height:58px;
  border-radius:50%;
  background:#25D366;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 6px 18px rgba(0,0,0,.28);
  transition:transform .15s ease, box-shadow .15s ease;
}
.whatsapp-float:hover{transform:translateY(-2px) scale(1.04);box-shadow:0 10px 22px rgba(0,0,0,.32);}
.whatsapp-float svg{width:30px;height:30px;fill:#ffffff;}
.whatsapp-float .wa-label{
  position:absolute;right:70px;
  background:var(--graphite);color:var(--paper);
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.06em;
  padding:8px 12px;white-space:nowrap;
  opacity:0;transform:translateX(6px);pointer-events:none;
  transition:opacity .15s ease, transform .15s ease;
}
.whatsapp-float:hover .wa-label{opacity:1;transform:translateX(0);}
@media (max-width:600px){
  .whatsapp-float{right:16px;bottom:16px;width:52px;height:52px;}
  .whatsapp-float svg{width:26px;height:26px;}
  .whatsapp-float .wa-label{display:none;}
}

/* ---------- footer ---------- */
.site-footer{background:var(--graphite);color:var(--concrete-2);padding:64px 0 28px;}
.footer-top{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:48px;
  padding-bottom:48px;border-bottom:1px solid var(--graphite-3);
}
@media (max-width:820px){.footer-top{grid-template-columns:1fr 1fr;row-gap:36px;}}
@media (max-width:520px){.footer-top{grid-template-columns:1fr;}}
.footer-top h4{
  color:var(--paper-2);font-size:.8rem;letter-spacing:.12em;margin-bottom:16px;
  font-family:var(--font-mono);text-transform:uppercase;
}
.footer-top .logo-mark{font-size:24px;margin-bottom:10px;}
.footer-top p{font-size:.92rem;max-width:32ch;}
.footer-links li{margin-bottom:10px;}
.footer-links a:hover{color:var(--mustard-2);}
.footer-bottom{
  display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;
  padding-top:24px;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.05em;color:var(--concrete);
}

/* ---------- page hero (interior pages, shorter) ---------- */
.page-hero{
  position:relative;min-height:52vh;display:flex;align-items:flex-end;color:var(--paper);overflow:hidden;
}
.page-hero .hero-content{padding:56px 0 48px;}
.page-hero h1{font-size:clamp(2.1rem,4.4vw,3.4rem);max-width:20ch;color:var(--white);}

/* ---------- misc ---------- */
.lead-block{max-width:820px;}
.lead-block p{font-size:1.08rem;color:var(--concrete);}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:56px;}
@media (max-width:820px){.two-col{grid-template-columns:1fr;gap:32px;}}
.check-list li{
  display:flex;gap:12px;padding:10px 0;border-top:1px solid var(--concrete-2);font-size:.98rem;
}
.check-list li:last-child{border-bottom:1px solid var(--concrete-2);}
.check-list li::before{content:'';flex-shrink:0;width:7px;height:7px;background:var(--mustard);margin-top:8px;}