:root {
  --blue-950: #061b34;
  --blue-900: #08264a;
  --blue-800: #0c2e59;
  --blue-700: #164b84;
  --blue-500: #2b7fc0;
  --sand-100: #f8f5ef;
  --sand-200: #efe7d8;
  --sand-400: #d5bd8d;
  --text: #142238;
  --muted: #5f6c7c;
  --white: #ffffff;
  --shadow: 0 22px 70px rgba(6, 27, 52, .16);
  --radius-lg: 28px;
  --radius-md: 18px;
  --max: 1160px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.6;
}

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

a {
  color: inherit;
}

.container {
  width: min(calc(100% - 40px), var(--max));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(8, 38, 74, .08);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 82px;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-logo {
  width: 48px;
  height: 48px;
  object-fit: contain;
}

.brand-name {
  color: var(--blue-950);
  font-weight: 900;
  letter-spacing: .12em;
  text-transform: uppercase;
  white-space: nowrap;
}

.main-nav {
  display: flex;
  gap: 26px;
  align-items: center;
  font-size: 14px;
  color: var(--blue-900);
}

.main-nav a,
.nav-cta {
  text-decoration: none;
  font-weight: 700;
}

.main-nav a:hover,
.contact-info a:hover {
  color: var(--blue-500);
}

.nav-cta {
  padding: 11px 18px;
  border-radius: 999px;
  color: var(--white);
  background: var(--blue-800);
  box-shadow: 0 10px 20px rgba(12, 46, 89, .16);
}

.hero {
  position: relative;
  min-height: 720px;
  display: grid;
  align-items: center;
  overflow: hidden;
  color: var(--white);
}

.hero-bg,
.hero-overlay {
  position: absolute;
  inset: 0;
}

.hero-bg {
  background-image: url("assets/obra-civil.jpg");
  background-size: cover;
  background-position: center;
  transform: scale(1.02);
}

.hero-overlay {
  background:
    linear-gradient(90deg, rgba(6, 27, 52, .94) 0%, rgba(8, 38, 74, .78) 44%, rgba(8, 38, 74, .25) 100%),
    linear-gradient(0deg, rgba(6, 27, 52, .45), rgba(6, 27, 52, .15));
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 90px 0;
  max-width: var(--max);
}

.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: var(--sand-400);
  text-transform: uppercase;
  letter-spacing: .18em;
  font-weight: 800;
  font-size: 12px;
}

.hero h1 {
  max-width: 720px;
  margin: 0;
  font-size: clamp(46px, 7vw, 86px);
  line-height: .98;
  letter-spacing: -.05em;
}

.hero-text {
  max-width: 650px;
  margin: 26px 0 0;
  color: rgba(255, 255, 255, .88);
  font-size: clamp(18px, 2vw, 22px);
}

.hero-actions,
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 14px 22px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 800;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--sand-400);
  color: var(--blue-950);
  box-shadow: 0 16px 34px rgba(0, 0, 0, .18);
}

.btn-secondary {
  border: 1px solid rgba(255, 255, 255, .42);
  color: var(--white);
  background: rgba(255, 255, 255, .12);
}

.btn-light {
  background: var(--white);
  color: var(--blue-900);
}

.section {
  padding: 92px 0;
}

.intro {
  background: var(--sand-100);
}

.intro-grid {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 52px;
  align-items: start;
}

h2 {
  margin: 0;
  color: var(--blue-950);
  font-size: clamp(34px, 5vw, 54px);
  line-height: 1.06;
  letter-spacing: -.035em;
}

.intro-copy p {
  margin-top: 0;
  font-size: 18px;
  color: var(--muted);
}

.intro-copy p:last-child {
  margin-bottom: 0;
}

.section-heading {
  max-width: 680px;
  margin-bottom: 42px;
}

.section-heading.compact {
  max-width: 760px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.card {
  padding: 32px;
  border-radius: var(--radius-md);
  background: var(--white);
  border: 1px solid rgba(8, 38, 74, .08);
  box-shadow: 0 14px 40px rgba(8, 38, 74, .07);
}

.card-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: rgba(43, 127, 192, .1);
  color: var(--blue-700);
  font-weight: 900;
  font-size: 13px;
}

.card h3 {
  margin: 22px 0 10px;
  color: var(--blue-950);
  font-size: 22px;
  line-height: 1.2;
}

.card p {
  margin: 0;
  color: var(--muted);
}

.feature-band {
  background: var(--blue-900);
  color: var(--white);
  padding: 34px 0;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.feature-item {
  padding: 22px 24px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .12);
}

.feature-item strong {
  display: block;
  font-size: 18px;
  margin-bottom: 6px;
}

.feature-item span {
  color: rgba(255, 255, 255, .72);
}

.gallery {
  background: var(--sand-100);
}

.gallery-grid {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  grid-template-rows: 260px 260px;
  gap: 18px;
}

.gallery-item {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  background: var(--blue-950);
}

.gallery-item.large {
  grid-row: span 2;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.contact {
  background: var(--blue-950);
  color: var(--white);
}

.contact-card {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 36px;
  align-items: stretch;
  padding: 44px;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at top right, rgba(43, 127, 192, .34), transparent 36%),
    var(--blue-900);
  box-shadow: 0 24px 80px rgba(0, 0, 0, .22);
}

.contact h2 {
  color: var(--white);
}

.contact-copy p:not(.section-kicker) {
  max-width: 640px;
  color: rgba(255, 255, 255, .74);
  font-size: 18px;
}

.contact-info {
  display: grid;
  gap: 16px;
  margin: 0;
  font-style: normal;
}

.contact-info div {
  padding: 24px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .1);
}

.contact-info span {
  display: block;
  margin-bottom: 8px;
  color: var(--sand-400);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .16em;
  font-weight: 900;
}

.contact-info a {
  display: block;
  color: var(--white);
  text-decoration: none;
  font-weight: 800;
}

.site-footer {
  background: #031326;
  color: rgba(255, 255, 255, .72);
  padding: 26px 0;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
  font-size: 14px;
}

@media (max-width: 900px) {
  .main-nav {
    display: none;
  }

  .hero {
    min-height: 640px;
  }

  .intro-grid,
  .cards,
  .feature-grid,
  .contact-card {
    grid-template-columns: 1fr;
  }

  .cards {
    gap: 14px;
  }

  .gallery-grid {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
  }

  .gallery-item,
  .gallery-item.large {
    min-height: 260px;
    grid-row: auto;
  }
}

@media (max-width: 620px) {
  .container {
    width: min(calc(100% - 28px), var(--max));
  }

  .nav {
    min-height: 72px;
  }

  .brand-logo {
    width: 42px;
    height: 42px;
  }

  .brand-name {
    font-size: 13px;
    letter-spacing: .08em;
  }

  .nav-cta {
    padding: 9px 14px;
    font-size: 14px;
  }

  .hero {
    min-height: 650px;
  }

  .hero-content {
    padding: 74px 0;
  }

  .hero-overlay {
    background: linear-gradient(90deg, rgba(6, 27, 52, .95), rgba(8, 38, 74, .7));
  }

  .section {
    padding: 68px 0;
  }

  .card,
  .contact-card {
    padding: 24px;
  }

  .footer-content {
    flex-direction: column;
  }
}