/* ============================================
   ACSOL — Advanced Construction Solutions
   ============================================ */

:root{
  --navy: #16233F;
  --navy-2: #1D2E4F;
  --steel: #3D5A73;
  --steel-light: #6E93B7;
  --gray-mid: #9DB2C2;
  --gray-light: #E4E8EC;
  --paper: #FFFFFF;
  --ink: #16233F;
  --ink-soft: #46566A;
  --line: #DCE2E7;

  --font-sans: 'IBM Plex Sans', Arial, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4rem;
  --space-7: 6rem;
  --space-8: 8rem;

  --max-w: 1240px;
  --radius: 2px;
  --ease: cubic-bezier(.4,0,.2,1);
}

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; scroll-padding-top: 84px; }
@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; }
}

body{
  margin: 0;
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--paper);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

h1,h2,h3{ font-family: var(--font-sans); font-weight: 700; line-height: 1.12; margin: 0; letter-spacing: -0.01em; }

.wrap{ max-width: var(--max-w); margin: 0 auto; padding: 0 var(--space-4); }
@media (max-width: 640px){ .wrap{ padding: 0 var(--space-3); } }

.skip-link{
  position: absolute; left: -9999px; top: 0; z-index: 1000;
  background: var(--navy); color: #fff; padding: 12px 18px;
}
.skip-link:focus{ left: var(--space-3); top: var(--space-3); }

:focus-visible{ outline: 2.5px solid var(--steel-light); outline-offset: 3px; }

.eyebrow{
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--steel);
  margin: 0 0 var(--space-2);
}
.section-title{
  font-size: clamp(1.6rem, 2.6vw, 2.4rem);
  max-width: 22ch;
}

.body-text{ color: var(--ink-soft); max-width: 56ch; }

.section{ padding: var(--space-7) 0; }
@media (max-width: 720px){ .section{ padding: var(--space-6) 0; } }

/* Buttons */
.btn{
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0.95em 1.7em;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius);
  border: 1.5px solid transparent;
  transition: background-color .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
  cursor: pointer;
  min-height: 44px;
}
.btn--primary{ background: var(--paper); color: var(--navy); }
.btn--primary:hover{ background: var(--gray-light); }
.btn--ghost{ background: transparent; color: #fff; border-color: rgba(255,255,255,0.55); }
.btn--ghost:hover{ background: rgba(255,255,255,0.12); border-color: #fff; }
.btn--dark{ background: var(--navy); color: #fff; }
.btn--dark:hover{ background: var(--steel); }
.btn:disabled{ opacity: 0.6; cursor: default; }

.text-link{ font-weight: 600; border-bottom: 1.5px solid currentColor; padding-bottom: 2px; }

/* ============ HEADER ============ */
.site-header{
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  transition: background-color .25s var(--ease), box-shadow .25s var(--ease);
}
.header-inner{
  display: flex; align-items: center; justify-content: space-between;
  height: 76px;
}
.brand{ display: inline-flex; align-items: center; }
.brand-logo{ height: 36px; width: auto; }
.brand-logo--solid{ display: none; }

.main-nav ul{ list-style: none; display: flex; gap: var(--space-5); margin: 0; padding: 0; }
.main-nav a{
  font-size: 0.92rem; font-weight: 600; color: #fff;
  padding: 6px 2px; border-bottom: 1.5px solid transparent;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}
.main-nav a:hover{ border-color: rgba(255,255,255,0.7); }

.nav-toggle{
  display: none;
  width: 44px; height: 44px;
  background: transparent; border: 0; cursor: pointer;
  flex-direction: column; align-items: center; justify-content: center; gap: 5px;
}
.nav-toggle span{ display: block; width: 22px; height: 2px; background: #fff; transition: transform .2s var(--ease), opacity .2s var(--ease); }

.mobile-menu{
  background: var(--navy);
  border-top: 1px solid rgba(255,255,255,0.12);
}
.mobile-menu ul{ list-style: none; margin: 0; padding: var(--space-2) var(--space-3) var(--space-4); }
.mobile-menu a{
  display: block; color: #fff; font-weight: 600; padding: 14px 0;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

/* scrolled state: solid header */
.site-header.is-solid{ background: var(--paper); box-shadow: 0 1px 0 var(--line); }
.site-header.is-solid .main-nav a{ color: var(--ink); }
.site-header.is-solid .main-nav a:hover{ border-color: var(--ink); }
.site-header.is-solid .nav-toggle span{ background: var(--ink); }
.site-header.is-solid .brand-logo--reverse{ display: none; }
.site-header.is-solid .brand-logo--solid{ display: block; }
.site-header.is-solid .mobile-menu{ background: var(--paper); border-top-color: var(--line); }
.site-header.is-solid .mobile-menu a{ color: var(--ink); border-bottom-color: var(--line); }

@media (max-width: 780px){
  .main-nav{ display: none; }
  .nav-toggle{ display: inline-flex; }
}

/* ============ HERO ============ */
.hero{
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex; align-items: flex-end;
  color: #fff;
  overflow: hidden;
}
.hero-media{ position: absolute; inset: 0; z-index: 0; }
.hero-media img{ width: 100%; height: 100%; object-fit: cover; object-position: center 40%; }
.hero-scrim{
  position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(180deg, rgba(22,35,63,0.55) 0%, rgba(22,35,63,0.35) 32%, rgba(22,35,63,0.78) 100%);
}
.hero-inner{
  position: relative; z-index: 2;
  padding-top: 120px;
  padding-bottom: var(--space-7);
}
.hero-headline{
  font-size: clamp(2.1rem, 4.6vw, 4rem);
  max-width: 17ch;
  margin-bottom: var(--space-3);
}
.hero-sub{
  font-size: clamp(1rem, 1.4vw, 1.2rem);
  max-width: 46ch;
  color: rgba(255,255,255,0.88);
  margin: 0 0 var(--space-5);
}
.hero-ctas{ display: flex; gap: var(--space-2); flex-wrap: wrap; }

@media (max-width: 640px){
  .hero-inner{ padding-top: 100px; }
}

/* ============ NOSOTROS ============ */
.nosotros-grid{
  display: grid; grid-template-columns: 1.1fr 0.9fr; gap: var(--space-7);
  align-items: center;
}
.lede{ font-size: clamp(1.25rem, 2vw, 1.6rem); font-weight: 500; line-height: 1.45; margin: 0 0 var(--space-3); }
.nosotros-media{ border-radius: var(--radius); overflow: hidden; max-height: 560px; }
.nosotros-media img{ width: 100%; height: 100%; object-fit: cover; }

@media (max-width: 900px){
  .nosotros-grid{ grid-template-columns: 1fr; gap: var(--space-4); }
  .nosotros-media{ order: -1; max-height: 380px; }
}

/* ============ SERVICIOS / AREAS ============ */
.servicios .wrap > .section-title{ margin-top: var(--space-1); }
.areas{ margin-top: var(--space-5); display: flex; flex-direction: column; gap: 4px; }

.area{ position: relative; color: #fff; padding: var(--space-6) var(--space-4); }
.area-num{ font-family: var(--font-mono); font-size: 0.85rem; letter-spacing: 0.1em; opacity: 0.75; display: block; margin-bottom: var(--space-2); }
.area h3{ font-size: clamp(1.3rem, 2.4vw, 1.9rem); margin-bottom: var(--space-2); }
.area p{ max-width: 60ch; color: rgba(255,255,255,0.85); margin: 0 0 var(--space-2); }

.area--featured{ min-height: 420px; display: flex; align-items: flex-end; }
.area--featured img{ position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: 0; }
.area-scrim{ position: absolute; inset: 0; background: linear-gradient(0deg, rgba(22,35,63,0.92) 10%, rgba(22,35,63,0.35) 70%); z-index: 1; }
.area--featured .area-content{ position: relative; z-index: 2; max-width: var(--max-w); margin: 0 auto; width: 100%; padding: 0 var(--space-2); }
.area--featured .area-content{ padding-left: calc(var(--space-4) - var(--space-4)); }

.area-row{ display: grid; grid-template-columns: 1fr 1fr; gap: 4px; }
.area--solid{ background: var(--navy); }
.area--solid.area--alt{ background: var(--steel); }

@media (max-width: 780px){
  .area-row{ grid-template-columns: 1fr; }
  .area--featured{ min-height: 360px; }
}

/* ============ PREFABRICADOS ============ */
.prefab-grid{ display: grid; grid-template-columns: 0.85fr 1.15fr; gap: var(--space-7); align-items: start; }
.capability-list{ list-style: none; margin: var(--space-4) 0 0; padding: 0; border-top: 1px solid var(--line); }
.capability-list li{
  display: flex; align-items: baseline; gap: var(--space-2);
  padding: 14px 0; border-bottom: 1px solid var(--line);
  font-family: var(--font-mono); font-size: 0.95rem;
}
.capability-list span{ color: var(--steel); font-size: 0.8rem; }

.prefab-gallery{ display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-2); }
.prefab-gallery figure{ margin: 0; position: relative; overflow: hidden; }
.prefab-gallery figure:first-child{ grid-column: 1 / -1; }
.prefab-gallery img{ width: 100%; height: 100%; object-fit: cover; aspect-ratio: 16/10; }
.prefab-gallery figure:first-child img{ aspect-ratio: 21/9; }
.prefab-gallery figcaption{
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 10px 14px;
  background: linear-gradient(0deg, rgba(22,35,63,0.85), rgba(22,35,63,0));
  color: #fff; font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase;
}

@media (max-width: 900px){
  .prefab-grid{ grid-template-columns: 1fr; gap: var(--space-4); }
  .prefab-gallery{ grid-template-columns: 1fr 1fr; }
}

/* ============ EXPERIENCIA / GALLERY ============ */
.gallery-grid{
  margin-top: var(--space-5);
  display: grid; grid-template-columns: repeat(4, 1fr); grid-auto-rows: 260px; gap: var(--space-2);
}
.gallery-item{ margin: 0; position: relative; overflow: hidden; grid-column: span 1; }
.gallery-item img{ width: 100%; height: 100%; object-fit: cover; transition: transform .5s var(--ease); }
.gallery-item:hover img{ transform: scale(1.04); }
.gallery-item--large{ grid-column: span 2; grid-row: span 2; }
.gallery-item figcaption{
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 10px 14px;
  background: linear-gradient(0deg, rgba(22,35,63,0.85), rgba(22,35,63,0));
  color: #fff; font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase;
}
.gallery-item--bw img{ filter: grayscale(1) contrast(1.05); }

@media (max-width: 900px){
  .gallery-grid{ grid-template-columns: repeat(2, 1fr); grid-auto-rows: 220px; }
  .gallery-item--large{ grid-column: span 2; grid-row: span 1; }
}

/* ============ CONTACTO ============ */
.contacto{ background: var(--gray-light); }
.contacto-grid{ display: grid; grid-template-columns: 0.8fr 1.2fr; gap: var(--space-7); }
.contact-details{ margin-top: var(--space-4); }
.contact-details div{ padding: var(--space-2) 0; border-bottom: 1px solid var(--line); }
.contact-details dt{ font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--steel); margin-bottom: 4px; }
.contact-details dd{ margin: 0; font-weight: 600; }
.contact-details a:hover{ text-decoration: underline; }

.contact-form{ display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3); }
.field{ display: flex; flex-direction: column; gap: 6px; }
.field--full{ grid-column: 1 / -1; }
.field label{ font-size: 0.85rem; font-weight: 600; }
.field input, .field textarea{
  font: inherit; padding: 0.85em 1em; border: 1.5px solid var(--line);
  border-radius: var(--radius); background: var(--paper); color: var(--ink);
  min-height: 44px;
}
.field textarea{ resize: vertical; min-height: 120px; }
.field input:focus, .field textarea:focus{ border-color: var(--steel); }

.form-status{ padding: 12px 14px; border-radius: var(--radius); font-size: 0.92rem; }
.form-status.is-success{ background: #E4F0E7; color: #1E4A2B; }
.form-status.is-error{ background: #F6E2E0; color: #6B2018; }

@media (max-width: 900px){
  .contacto-grid{ grid-template-columns: 1fr; gap: var(--space-4); }
  .contact-form{ grid-template-columns: 1fr; }
}

/* ============ FOOTER ============ */
.site-footer{ background: var(--navy); color: rgba(255,255,255,0.85); padding-top: var(--space-6); }
.footer-inner{ display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--space-4); padding-bottom: var(--space-5); border-bottom: 1px solid rgba(255,255,255,0.14); }
.footer-brand p{ margin: 4px 0 0; font-size: 0.92rem; }
.footer-brand a:hover{ text-decoration: underline; }
.footer-nav ul{ list-style: none; display: flex; gap: var(--space-4); margin: 0; padding: 0; flex-wrap: wrap; }
.footer-nav a{ font-size: 0.92rem; font-weight: 600; }
.footer-nav a:hover{ text-decoration: underline; }
.footer-bottom{ padding: var(--space-3) var(--space-4); font-size: 0.82rem; opacity: 0.7; }