:root {
  --azul: #0b5fa5;
  --azul-osc: #083c6b;
  --sol: #ffb400;
  --sol-claro: #ffd166;
  --claro: #f4f7fb;
  --txt: #1d2733;
  --gris: #5b6b7b;
  --blanco: #ffffff;
  --sombras: 0 12px 30px rgba(11, 95, 165, 0.12);
  --radio: 16px;
}

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

html { scroll-behavior: smooth; }

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

.container { width: min(1120px, 92%); margin: 0 auto; }

img { display: block; max-width: 100%; }
a { text-decoration: none; color: inherit; }

/* ===== Header ===== */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  box-shadow: 0 2px 12px rgba(11, 95, 165, 0.08);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 0;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-logo { width: 46px; height: 46px; }
.brand-name { font-weight: 800; font-size: 1.15rem; color: var(--azul-osc); }
.brand-name em { font-style: normal; color: var(--sol); }

.main-nav { display: flex; gap: 26px; }
.main-nav a {
  color: var(--gris); font-weight: 600; font-size: 0.95rem;
  transition: color 0.2s;
}
.main-nav a:hover { color: var(--azul); }

.menu-toggle {
  display: none; background: none; border: none; cursor: pointer;
  width: 30px; height: 22px; position: relative;
}
.menu-toggle span {
  display: block; height: 3px; width: 100%; background: var(--azul-osc);
  border-radius: 2px; margin: 5px 0; transition: 0.3s;
}

/* ===== Hero ===== */
.hero { position: relative; min-height: 70vh; display: flex; align-items: center; overflow: hidden; }
.hero-bg {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  background-image: url("https://images.unsplash.com/photo-1509391366360-2e959784a276?auto=format&fit=crop&w=1600&q=80");
}
.hero-bg::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(120deg, rgba(8, 60, 107, 0.92), rgba(11, 95, 165, 0.6));
}
.hero-content { position: relative; z-index: 2; color: var(--blanco); padding: 70px 0; max-width: 620px; }
.hero-tagline {
  display: inline-block; background: rgba(255, 180, 0, 0.9); color: var(--azul-osc);
  font-weight: 700; font-size: 0.85rem; letter-spacing: 0.5px;
  padding: 6px 14px; border-radius: 999px; margin-bottom: 18px;
}
.hero h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); line-height: 1.1; margin-bottom: 16px; }
.hero p { font-size: 1.1rem; opacity: 0.95; margin-bottom: 28px; }

.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ===== Buttons ===== */
.btn {
  display: inline-block; padding: 14px 28px; border-radius: 999px;
  font-weight: 700; font-size: 1rem; cursor: pointer; transition: 0.25s;
  border: 2px solid transparent;
}
.btn-primary { background: var(--sol); color: var(--azul-osc); }
.btn-primary:hover { background: var(--sol-claro); transform: translateY(-2px); }
.btn-ghost { border-color: rgba(255,255,255,0.6); color: var(--blanco); }
.btn-ghost:hover { background: rgba(255,255,255,0.15); }

/* ===== Stats ===== */
.stats { background: var(--azul); color: var(--blanco); }
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
  text-align: center; padding: 34px 0;
}
.stat strong { display: block; font-size: 1.9rem; color: var(--sol-claro); }
.stat span { opacity: 0.85; font-size: 0.95rem; }

/* ===== Section base ===== */
.section { padding: 72px 0; }
.section:nth-of-type(even) { background: var(--claro); }
.section-head { text-align: center; margin-bottom: 44px; }
.section-head h2 { font-size: 2rem; color: var(--azul-osc); margin-bottom: 8px; }
.section-head p { color: var(--gris); }

/* ===== Cards ===== */
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.card {
  background: var(--blanco); border-radius: var(--radio);
  overflow: hidden; box-shadow: var(--sombras); transition: 0.3s;
}
.card:hover { transform: translateY(-6px); }
.card img { width: 100%; height: 190px; object-fit: cover; }
.card h3 { padding: 18px 18px 6px; color: var(--azul-osc); font-size: 1.05rem; }
.card p { padding: 0 18px 20px; color: var(--gris); font-size: 0.92rem; }

/* ===== Gallery ===== */
.gallery {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.gallery-item {
  position: relative; border-radius: var(--radio); overflow: hidden;
  cursor: zoom-in; aspect-ratio: 4/3;
}
.gallery-item img { width: 100%; height: 100%; object-fit: cover; transition: 0.4s; }
.gallery-item:hover img { transform: scale(1.06); }
.gallery-item figcaption {
  position: absolute; left: 0; right: 0; bottom: 0;
  background: linear-gradient(transparent, rgba(8,60,107,0.8));
  color: var(--blanco); font-size: 0.85rem; padding: 28px 14px 12px;
  opacity: 0; transition: 0.3s;
}
.gallery-item:hover figcaption { opacity: 1; }

/* ===== Offices ===== */
.offices { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.office {
  background: var(--blanco); border-radius: var(--radio); padding: 30px;
  box-shadow: var(--sombras); text-align: center;
}
.office-icon { font-size: 2.4rem; margin-bottom: 12px; }
.office h3 { color: var(--azul-osc); margin-bottom: 6px; }
.office p { color: var(--gris); margin-bottom: 6px; }
.office a { color: var(--azul); font-weight: 700; }

/* ===== Contact ===== */
.contact-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 44px;
  background: var(--blanco); border-radius: var(--radio);
  box-shadow: var(--sombras); padding: 34px;
}
.contact-info p { margin-bottom: 14px; font-size: 1.05rem; }
.contact-info a { color: var(--azul); font-weight: 600; }
.socials { display: flex; gap: 12px; margin-top: 20px; }
.social {
  width: 44px; height: 44px; border-radius: 50%;
  display: grid; place-items: center; background: var(--azul);
  color: var(--blanco); font-weight: 700; transition: 0.25s;
}
.social:hover { background: var(--sol); color: var(--azul-osc); transform: translateY(-3px); }

.contact-form { display: flex; flex-direction: column; gap: 14px; }
.contact-form input,
.contact-form select,
.contact-form textarea {
  padding: 14px; border: 1.5px solid #d7e0ea; border-radius: 10px;
  font-size: 1rem; font-family: inherit; color: var(--txt);
  transition: border 0.2s;
}
.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  outline: none; border-color: var(--azul);
}
.contact-form button { align-self: flex-start; }
.form-note { font-size: 0.9rem; color: green; font-weight: 600; }

/* ===== Footer ===== */
.site-footer { background: var(--azul-osc); color: rgba(255,255,255,0.85); }
.footer-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 26px 0; font-size: 0.9rem; gap: 16px; flex-wrap: wrap;
}
.footer-socials { display: flex; gap: 10px; }
.footer-socials a {
  width: 34px; height: 34px; border-radius: 50%;
  display: grid; place-items: center;
  background: rgba(255,255,255,0.1); transition: 0.25s; font-size: 0.8rem;
}
.footer-socials a:hover { background: var(--sol); color: var(--azul-osc); }

/* ===== Lightbox ===== */
.lightbox {
  display: none; position: fixed; inset: 0; z-index: 100;
  background: rgba(0,0,0,0.92); align-items: center; justify-content: center;
  padding: 30px;
}
.lightbox.show { display: flex; }
.lightbox img { max-width: 90vw; max-height: 85vh; border-radius: 8px; }
.lightbox-close {
  position: absolute; top: 18px; right: 26px; background: none; border: none;
  color: var(--blanco); font-size: 3rem; cursor: pointer; line-height: 1;
}

/* ===== Reveal ===== */
.reveal { opacity: 0; transform: translateY(24px); transition: 0.6s; }
.reveal.visible { opacity: 1; transform: none; }

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .cards { grid-template-columns: repeat(2, 1fr); }
  .gallery { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .offices { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 620px) {
  .main-nav {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    background: var(--blanco); flex-direction: column; padding: 18px 6%;
    box-shadow: 0 12px 20px rgba(11,95,165,0.12); gap: 16px;
  }
  .main-nav.open { display: flex; }
  .menu-toggle { display: block; }
  .cards, .gallery { grid-template-columns: 1fr; }
}