/* =====================================================================
   Concrearmado SAS — Sitio web corporativo
   Paleta inspirada en ingeniería civil: acero, concreto, señalización
   ===================================================================== */

:root {
  --c-primary: #0f3f6b;      /* azul acero */
  --c-primary-dark: #0a2c4d;
  --c-primary-light: #1f5b91;
  --c-accent: #f39200;       /* naranja de seguridad */
  --c-accent-dark: #cc7900;
  --c-text: #1f2a37;
  --c-muted: #5b6773;
  --c-bg: #ffffff;
  --c-bg-alt: #f4f6f9;
  --c-border: #e3e8ef;
  --c-success: #2f8f4a;

  --radius: 6px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 3px rgba(15, 63, 107, 0.08);
  --shadow-md: 0 6px 20px rgba(15, 63, 107, 0.12);

  --container: 1200px;
  --font-sans: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-head: 'Poppins', 'Inter', system-ui, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--c-primary); text-decoration: none; transition: color .2s; }
a:hover { color: var(--c-accent); }

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.25;
  color: var(--c-primary-dark);
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.btn {
  display: inline-block;
  padding: .75rem 1.5rem;
  background: var(--c-accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: background .2s, transform .2s;
}
.btn:hover { background: var(--c-accent-dark); color: #fff; transform: translateY(-1px); }
.btn-outline {
  background: transparent;
  border: 2px solid #fff;
  color: #fff;
}
.btn-outline:hover { background: #fff; color: var(--c-primary-dark); }

/* =========================== TOP BAR =========================== */
.topbar {
  background: var(--c-primary-dark);
  color: #fff;
  font-size: .875rem;
  padding: .5rem 0;
}
.topbar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: .5rem;
}
.topbar a { color: #fff; }
.topbar a:hover { color: var(--c-accent); }
.topbar-contact { display: flex; gap: 1.25rem; flex-wrap: wrap; }

/* =========================== HEADER =========================== */
.site-header {
  background: #fff;
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .9rem 0;
}
.logo {
  display: flex;
  align-items: center;
  gap: .6rem;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--c-primary-dark);
}
.logo img { height: 48px; width: auto; }

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  font-size: 1.5rem;
  color: var(--c-primary-dark);
  cursor: pointer;
}

.main-nav ul {
  display: flex;
  gap: 2rem;
  list-style: none;
  align-items: center;
}
.main-nav a {
  color: var(--c-text);
  font-weight: 500;
  padding: .5rem 0;
  position: relative;
}
.main-nav a.active,
.main-nav a:hover { color: var(--c-accent); }
.main-nav a.active::after,
.main-nav a:hover::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -4px;
  height: 3px;
  background: var(--c-accent);
  border-radius: 2px;
}

/* =========================== HERO =========================== */
.hero {
  position: relative;
  min-height: 520px;
  display: flex;
  align-items: center;
  color: #fff;
  background: linear-gradient(135deg, rgba(10,44,77,.85), rgba(15,63,107,.7)),
    url('../images/slider/img1.png') center/cover no-repeat,
    linear-gradient(135deg, #0a2c4d, #1f5b91);
}
.hero-inner {
  padding: 5rem 0;
  max-width: 760px;
}
.hero h1 {
  color: #fff;
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  margin-bottom: 1rem;
}
.hero p {
  font-size: 1.125rem;
  margin-bottom: 2rem;
  opacity: .95;
}
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }

/* Sub-header for inner pages */
.page-hero {
  background: linear-gradient(135deg, var(--c-primary-dark), var(--c-primary));
  color: #fff;
  padding: 3.5rem 0 2.5rem;
  text-align: center;
}
.page-hero h1 { color: #fff; font-size: 2.25rem; }
.breadcrumb { margin-top: .75rem; font-size: .9rem; opacity: .85; }
.breadcrumb a { color: #fff; text-decoration: underline; }

/* =========================== SECTIONS =========================== */
section { padding: 4rem 0; }
.section-title {
  text-align: center;
  margin-bottom: 2.5rem;
}
.section-title h2 {
  font-size: 2rem;
  margin-bottom: .5rem;
}
.section-title .divider {
  width: 80px; height: 4px;
  background: var(--c-accent);
  margin: 1rem auto 0;
  border-radius: 2px;
}
.section-title p {
  color: var(--c-muted);
  max-width: 760px;
  margin: 1rem auto 0;
}

.bg-alt { background: var(--c-bg-alt); }

/* =========================== GRID CARDS =========================== */
.grid { display: grid; gap: 1.75rem; }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.card {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform .25s, box-shadow .25s;
  display: flex;
  flex-direction: column;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.card .card-img {
  aspect-ratio: 16/10;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-light));
  position: relative;
  overflow: hidden;
}
.card .card-img img {
  width: 100%; height: 100%; object-fit: cover;
}
.card .card-img .badge {
  position: absolute;
  top: .75rem; left: .75rem;
  background: var(--c-accent);
  color: #fff;
  padding: .25rem .65rem;
  font-size: .75rem;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: .5px;
  font-weight: 600;
}
.card .card-body {
  padding: 1.25rem 1.25rem 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.card h3 {
  font-size: 1.05rem;
  margin-bottom: .5rem;
  color: var(--c-primary-dark);
}
.card p { color: var(--c-muted); font-size: .95rem; flex: 1; }
.card .meta {
  margin-top: 1rem;
  font-size: .85rem;
  color: var(--c-muted);
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}
.card .meta span::before {
  content: '• ';
  color: var(--c-accent);
}

.service-card {
  text-align: center;
  padding: 2rem 1.5rem;
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform .25s, box-shadow .25s;
}
.service-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.service-card .icon {
  width: 80px; height: 80px;
  margin: 0 auto 1.25rem;
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-light) 100%);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 18px rgba(15,63,107,.22);
  transition: transform .3s, box-shadow .3s;
}
.service-card:hover .icon {
  transform: scale(1.08) rotate(-4deg);
  box-shadow: 0 10px 28px rgba(15,63,107,.32);
  background: linear-gradient(135deg, var(--c-accent) 0%, var(--c-accent-dark) 100%);
}
.service-card .icon svg {
  width: 44px; height: 44px;
  stroke: #fff;
  fill: none;
}

/* =========================== FEATURED STATS =========================== */
.stats {
  background: var(--c-primary-dark);
  color: #fff;
  padding: 3rem 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  text-align: center;
}
.stats-grid .num {
  font-family: var(--font-head);
  font-size: 2.75rem;
  font-weight: 700;
  color: var(--c-accent);
  line-height: 1;
}
.stats-grid .label { margin-top: .5rem; font-size: .95rem; opacity: .9; }

/* =========================== PROJECT FILTERS =========================== */
.filter-bar {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: .5rem;
  margin-bottom: 2.5rem;
}
.filter-bar button {
  background: transparent;
  border: 2px solid var(--c-border);
  color: var(--c-text);
  padding: .5rem 1.25rem;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 500;
  transition: all .2s;
}
.filter-bar button:hover { border-color: var(--c-primary); color: var(--c-primary); }
.filter-bar button.active {
  background: var(--c-primary);
  color: #fff;
  border-color: var(--c-primary);
}

/* =========================== DOC LIST =========================== */
.doc-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: .75rem;
  list-style: none;
}
.doc-list li {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: .9rem 1.1rem;
  display: flex;
  align-items: center;
  gap: .75rem;
  transition: all .2s;
}
.doc-list li:hover { border-color: var(--c-primary); box-shadow: var(--shadow-sm); }
.doc-list a {
  color: var(--c-text);
  font-weight: 500;
  flex: 1;
}
.doc-list a:hover { color: var(--c-primary); }
.doc-icon {
  width: 36px; height: 36px;
  background: var(--c-primary);
  color: #fff;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .75rem;
  font-weight: 700;
  flex-shrink: 0;
}

/* =========================== CONTACT =========================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 2.5rem;
  align-items: start;
}
.contact-info h3 {
  color: var(--c-primary-dark);
  margin-bottom: .5rem;
  font-size: 1rem;
}
.contact-info .info-block {
  background: #fff;
  border-left: 4px solid var(--c-accent);
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
  border-radius: 0 var(--radius) var(--radius) 0;
  box-shadow: var(--shadow-sm);
}
.contact-info a { word-break: break-word; }
.map-wrapper {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  height: 100%;
  min-height: 420px;
}
.map-wrapper iframe { width: 100%; height: 100%; border: 0; display: block; min-height: 420px; }

/* =========================== FOOTER =========================== */
.site-footer {
  background: #0a2030;
  color: #c8d0db;
  padding: 3.5rem 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}
.site-footer h4 {
  color: #fff;
  font-size: 1rem;
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.site-footer ul { list-style: none; }
.site-footer li { margin-bottom: .5rem; font-size: .95rem; }
.site-footer a { color: #c8d0db; }
.site-footer a:hover { color: var(--c-accent); }
.site-footer .logo { color: #fff; margin-bottom: 1rem; }
.site-footer p { font-size: .95rem; line-height: 1.7; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 1.25rem 0;
  text-align: center;
  font-size: .875rem;
}

/* =========================== RESPONSIVE =========================== */
@media (max-width: 992px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .main-nav {
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: #fff;
    box-shadow: var(--shadow-md);
    max-height: 0;
    overflow: hidden;
    transition: max-height .3s;
  }
  .main-nav.open { max-height: 600px; }
  .main-nav ul {
    flex-direction: column;
    gap: 0;
    padding: 1rem 1.25rem;
  }
  .main-nav li { border-bottom: 1px solid var(--c-border); }
  .main-nav li:last-child { border-bottom: 0; }
  .main-nav a { display: block; padding: .85rem 0; }
  .grid-3, .grid-2, .grid-4 { grid-template-columns: 1fr; }
  .doc-list { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .topbar-inner { justify-content: center; text-align: center; }
  .hero-inner { padding: 3.5rem 0; }
}