:root {
  --amarillo: #f9b400;
  --amarillo-osc: #e09e00;
  --azul: #0b3a5c;
  --azul-osc: #072a44;
  --texto: #1d2730;
  --suave: #f5f7f8;
  --blanco: #ffffff;
  --gris: #5b6770;
  --sombra: 0 10px 30px rgba(0, 0, 0, 0.08);
}

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

img {
  background: linear-gradient(120deg, #dfe9f0 25%, #eef4f7 50%, #dfe9f0 75%);
  background-size: 200% 100%;
  animation: shimmer 1.6s infinite linear;
}
@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}
img.loaded, img:not([src]) { animation: none; }

html { scroll-behavior: smooth; }

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--texto);
  line-height: 1.6;
  background: var(--blanco);
}

h1, h2, h3 { line-height: 1.15; color: var(--azul); }
img { display: block; max-width: 100%; }

/* Navegación */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 5%;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06);
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }

.brand-mark {
  width: 40px; height: 40px;
  display: grid; place-items: center;
  font-size: 22px;
  background: linear-gradient(135deg, var(--amarillo), var(--amarillo-osc));
  border-radius: 10px;
}
.brand-name { font-size: 1.4rem; font-weight: 800; color: var(--azul); }
.nav-links { display: flex; gap: 24px; }
.nav-links a { color: var(--texto); text-decoration: none; font-weight: 500; }
.nav-links a:hover { color: var(--amarillo-osc); }
.cta {
  background: var(--amarillo);
  color: var(--azul-osc);
  font-weight: 700;
  padding: 10px 20px;
  border-radius: 30px;
  text-decoration: none;
}
.cta:hover { background: var(--amarillo-osc); }
.menu-toggle { display: none; font-size: 26px; background: none; border: none; cursor: pointer; }

/* Hero */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  padding: 120px 5% 60px;
  overflow: hidden;
}
.hero-bg img {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  filter: brightness(0.55);
  opacity: 0;
  transition: opacity 0.6s ease;
}
.hero-bg img.loaded { opacity: 1; }
.hero-content {
  position: relative;
  max-width: 720px;
  color: var(--blanco);
}
.badge {
  display: inline-block;
  background: rgba(249, 180, 0, 0.9);
  color: var(--azul-osc);
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 30px;
  margin-bottom: 18px;
  font-size: 0.9rem;
}
.hero h1 { color: var(--blanco); font-size: clamp(2.2rem, 6vw, 4rem); margin-bottom: 18px; }
.hero-sub { color: #e8eef3; font-size: 1.15rem; max-width: 560px; margin-bottom: 30px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 44px; }
.btn {
  display: inline-block;
  padding: 14px 26px;
  border-radius: 30px;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  border: none;
  font-size: 1rem;
}
.btn-primary { background: var(--amarillo); color: var(--azul-osc); }
.btn-primary:hover { background: var(--amarillo-osc); }
.btn-ghost {
  background: transparent;
  color: var(--blanco);
  border: 2px solid rgba(255, 255, 255, 0.7);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.15); }
.hero-stats { display: flex; gap: 40px; flex-wrap: wrap; }
.hero-stats div { text-align: center; }
.hero-stats strong {
  display: block;
  font-size: 2.2rem;
  color: var(--amarillo);
}
.hero-stats span { color: #d7e2eb; font-size: 0.95rem; }

/* Secciones */
.section { padding: 90px 5%; scroll-margin-top: 70px; }
.section-dark { background: var(--azul); }
.section-dark h2, .section-dark .section-head p { color: var(--blanco); }
.section-dark h2 { color: var(--blanco); }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 48px; }
.section-head h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); margin-bottom: 14px; }
.section-head p { color: var(--gris); }

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  max-width: 1200px;
  margin: 0 auto;
}
.card {
  background: var(--blanco);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--sombra);
}
.card-img { position: relative; }
.card-img img { width: 100%; height: 190px; object-fit: cover; }
.card-icon {
  position: absolute;
  bottom: -18px; left: 20px;
  width: 54px; height: 54px;
  display: grid; place-items: center;
  font-size: 26px;
  background: var(--amarillo);
  border-radius: 14px;
  box-shadow: 0 6px 14px rgba(0, 0, 0, 0.15);
}
.card h3 { padding: 34px 22px 8px; }
.card p { padding: 0 22px 26px; color: var(--gris); }

/* Proyectos */
.proyectos-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  max-width: 1200px;
  margin: 0 auto;
}
.proyecto {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--sombra);
}
.proyecto-img { width: 100%; height: 340px; object-fit: cover; display: block; }
.proyecto-info {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 20px;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.78));
  color: var(--blanco);
}
.proyecto-info h3 { color: var(--blanco); }
.proyecto-info p { color: #e2ebf1; font-size: 0.95rem; }

/* Galería */
.galeria-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: 230px;
  gap: 16px;
  max-width: 1200px;
  margin: 0 auto;
}
.galeria-grid img {
  width: 100%; height: 100%;
  object-fit: cover;
  border-radius: 12px;
  box-shadow: var(--sombra);
}
.galeria-grid img.wide { grid-column: span 2; }
.galeria-grid img.tall { grid-row: span 2; }

/* Nosotros */
.nosotros-flex {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}
.nosotros-img img { border-radius: 16px; box-shadow: var(--sombra); width: 100%; height: 100%; object-fit: cover; }
.nosotros-texto h2 { font-size: clamp(1.8rem, 4vw, 2.4rem); margin-bottom: 20px; }
.nosotros-texto p { color: var(--gris); margin-bottom: 16px; }
.nosotros-list { list-style: none; margin-top: 10px; }
.nosotros-list li { padding: 6px 0; color: var(--texto); font-weight: 500; }

/* Contacto */
.contacto-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  max-width: 1200px;
  margin: 0 auto;
  color: #dce7f0;
}
.contacto-grid h3 { color: var(--amarillo); margin: 22px 0 12px; }
.contacto-line { margin-bottom: 8px; }
.contacto-line strong { color: var(--blanco); }
.mapa {
  margin: 20px 0;
  padding: 20px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.08);
  text-align: center;
}
.mapa p { margin-bottom: 14px; }
.social-links { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 10px; }
.social-link {
  background: rgba(255, 255, 255, 0.12);
  color: var(--blanco);
  padding: 10px 18px;
  border-radius: 30px;
  text-decoration: none;
  font-weight: 600;
}
.social-link:hover { background: var(--amarillo); color: var(--azul-osc); }

.contacto-form {
  background: rgba(255, 255, 255, 0.06);
  border-radius: 16px;
  padding: 30px;
}
.contacto-form h3 { margin-top: 0; }
.contacto-form label { display: block; margin-bottom: 14px; font-weight: 600; color: var(--blanco); }
.contacto-form input,
.contacto-form select,
.contacto-form textarea {
  width: 100%;
  margin-top: 6px;
  padding: 12px 14px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 10px;
  background: var(--blanco);
  color: var(--texto);
  font-size: 1rem;
  font-family: inherit;
}
.form-estado { margin-top: 14px; font-weight: 600; min-height: 22px; }
.form-estado.ok { color: #7ee0a0; }
.form-estado.err { color: #ffb3b3; }

/* Footer */
.footer {
  background: var(--azul-osc);
  color: #b9c8d4;
  text-align: center;
  padding: 30px 5%;
  font-size: 0.9rem;
}
.footer p { margin: 4px 0; }

/* Responsive */
@media (max-width: 900px) {
  .grid, .proyectos-grid, .galeria-grid { grid-template-columns: repeat(2, 1fr); }
  .nosotros-flex, .contacto-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .nav-links {
    position: fixed;
    top: 0; right: -260px;
    width: 260px;
    height: 100vh;
    background: var(--blanco);
    flex-direction: column;
    padding: 80px 30px 30px;
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.15);
    transition: right 0.3s ease;
  }
  .nav-links.open { right: 0; }
  .menu-toggle { display: block; z-index: 110; }
  .grid, .proyectos-grid, .galeria-grid { grid-template-columns: 1fr; }
  .hero { padding-top: 110px; }
}