/* INGAC — Ingeniería y Construcción
   Paleta y tipografía tomadas del brochure institucional 2026 */
:root {
  --azul: #356F94;        /* azul institucional (logo, acentos) */
  --azul-oscuro: #2A5A79;
  --tinta: #223746;       /* títulos */
  --texto: #2E3B45;
  --gris: #6B7A86;        /* bajadas y textos secundarios */
  --celeste: #DDE6F4;     /* formas diagonales */
  --panel: #EAEFF4;       /* fondo de tarjetas */
  --linea: #DCE3EA;
  --blanco: #FFFFFF;
  --font: Arial, "Helvetica Neue", Helvetica, sans-serif;
  --wrap: 1180px;
  --gutter: clamp(16px, 4vw, 40px);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--texto);
  background: var(--blanco);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
h1, h2, h3 { color: var(--tinta); margin: 0; line-height: 1.15; }

.wrap { width: 100%; max-width: calc(var(--wrap) + 2 * var(--gutter)); margin: 0 auto; padding: 0 var(--gutter); }

.eyebrow {
  margin: 0 0 14px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--azul);
}
.h2 { font-size: clamp(30px, 4.2vw, 48px); font-weight: 700; letter-spacing: -.01em; }
.h3 { font-size: clamp(22px, 2.4vw, 30px); font-weight: 700; }
.lead { font-size: clamp(17px, 1.8vw, 22px); color: var(--gris); margin: 16px 0 0; max-width: 62ch; }
.lead-dark { color: var(--texto); }
.lead-sm { font-size: 18px; margin-top: 8px; }
.num { font-weight: 700; color: var(--azul); font-size: 15px; letter-spacing: .02em; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 22px;
  font: 700 14px/1 var(--font);
  letter-spacing: .08em; text-transform: uppercase;
  text-decoration: none;
  border: 2px solid var(--azul);
  transition: background .2s, color .2s;
}
.btn-primary { background: var(--azul); color: #fff; }
.btn-primary:hover { background: var(--azul-oscuro); border-color: var(--azul-oscuro); }
.btn-ghost { color: var(--azul); background: transparent; }
.btn-ghost:hover { background: var(--azul); color: #fff; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--linea);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand-logo { height: 34px; width: auto; }
.brand-sub {
  border-left: 1px solid var(--azul); padding-left: 10px;
  font-size: 11px; line-height: 1.35; text-transform: uppercase; color: var(--tinta); letter-spacing: .02em;
}
.nav { display: flex; align-items: center; gap: 30px; }
.nav a {
  text-decoration: none; font-size: 13px; font-weight: 700; letter-spacing: .14em;
  text-transform: uppercase; color: var(--tinta); position: relative; padding: 6px 0;
}
.nav a:not(.nav-cta)::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: 0; height: 2px; background: var(--azul); transition: right .25s;
}
.nav a:hover::after, .nav a.active::after { right: 0; }
.nav .nav-cta { background: var(--azul); color: #fff; padding: 11px 18px; }
.nav .nav-cta:hover { background: var(--azul-oscuro); }
.nav-toggle { display: none; background: none; border: 0; padding: 8px; cursor: pointer; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--tinta); margin: 5px 0; transition: transform .2s, opacity .2s; }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  min-height: min(calc(100vh - 76px), 820px);
  display: flex; flex-direction: column; justify-content: center;
  padding: 72px 0 40px;
}
.hero-shapes { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; }
.hero-inner, .hero-foot { position: relative; z-index: 1; }
.hero-logo { display: inline-flex; flex-direction: column; width: min(560px, 100%); margin: 0; }
.hero-logo img { width: 100%; height: auto; }
.hero-rule { display: block; height: 2px; background: var(--azul); margin: 22px 0 18px; }
.hero-sub {
  display: flex; justify-content: space-between; font-size: clamp(13px, 1.9vw, 23px); font-weight: 700; color: var(--tinta);
  text-transform: uppercase; white-space: nowrap;
}
.hero-sub span { display: inline-block; }
.hero-tagline { font-size: clamp(26px, 3.8vw, 46px); font-weight: 700; color: var(--tinta); margin: clamp(48px, 9vh, 110px) 0 0; letter-spacing: -.01em; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; }
.hero-foot { margin-top: clamp(48px, 9vh, 96px); }
.hero-foot .wrap, .hero-foot { }
.hero-foot .eyebrow { display: block; border-top: 1.5px solid var(--azul); padding-top: 22px; margin: 0; }

/* ---------- Sections ---------- */
.section { padding: clamp(72px, 10vw, 120px) 0; border-top: 1px solid var(--linea); }
.section-alt { background: linear-gradient(180deg, #F6F8FB 0, #fff 100%); }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }

/* Service cards */
.svc-grid { margin-top: 56px; }
.svc-card {
  background: var(--panel); padding: 32px 32px 40px; text-decoration: none; color: var(--texto);
  display: block; position: relative; transition: transform .25s, box-shadow .25s;
  border-bottom: 3px solid transparent;
}
.svc-card:hover { transform: translateY(-4px); box-shadow: 0 18px 40px -24px rgba(34,55,70,.45); border-bottom-color: var(--azul); }
.svc-top { display: flex; justify-content: space-between; align-items: flex-start; min-height: 80px; }
.svc-icon { width: 64px; height: 64px; fill: none; stroke: var(--azul); stroke-width: 2.6; stroke-linecap: round; stroke-linejoin: round; }
.svc-card h3 { font-size: 24px; margin: 24px 0 18px; }
.svc-card p { margin: 0 0 14px; font-size: 17px; }

/* Tabs */
.tabs { display: flex; flex-wrap: wrap; gap: 0; margin-top: 48px; border-bottom: 1px solid var(--linea); }
.tabs button {
  font: 700 15px/1.3 var(--font); color: var(--gris); background: none; border: 0; cursor: pointer;
  padding: 16px 22px; border-bottom: 3px solid transparent; margin-bottom: -1px; text-align: left;
}
.tabs button:hover { color: var(--tinta); }
.tabs button[aria-selected="true"] { color: var(--azul); border-bottom-color: var(--azul); background: var(--panel); }
.tab-panel { padding-top: 36px; animation: fade .35s ease; }
@keyframes fade { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
.panel-head { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: 32px; align-items: end; margin-bottom: 28px; }
.panel-head p { margin: 0; color: var(--gris); font-size: 18px; }

/* Galleries */
.ph { margin: 0; overflow: hidden; background: var(--panel); position: relative; }
.ph img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.gallery .ph { cursor: zoom-in; }
.gallery .ph:hover img { transform: scale(1.04); }
.gallery { display: grid; gap: 20px; }
.g-1-2 { grid-template-columns: 1.82fr 1fr; grid-template-rows: repeat(2, minmax(0, 1fr)); height: clamp(360px, 46vw, 560px); }
.g-1-2 .ph-main { grid-row: 1 / 3; }
.g-fund { grid-template-columns: repeat(3, 1fr); grid-template-rows: repeat(2, minmax(0, 1fr)); height: clamp(420px, 50vw, 600px); }
.g-fund .ph-tall { grid-row: 1 / 3; }
.g-fund .ph:nth-child(3) { grid-column: 3; grid-row: 1; }
.g-fund .ph:nth-child(4) { grid-column: 3; grid-row: 2; }

/* Split layouts */
.split { display: grid; gap: clamp(32px, 5vw, 64px); align-items: center; margin-top: 56px; }
.split-gestion { grid-template-columns: 1fr 1.9fr; }
.split-hormigon { grid-template-columns: 1fr 1.05fr; }
.split-metal { grid-template-columns: 1fr 2.2fr; margin-top: 32px; }
.ph-plain img { height: auto; }
.ph-white { background: #fff; }

.feature-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 40px; }
.feature-list h3 { color: var(--azul); font-size: 26px; margin-bottom: 10px; }
.feature-list p { margin: 0; color: var(--gris); font-size: 18px; }

.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 36px; }
.steps li { display: grid; grid-template-columns: 52px 1fr; align-items: baseline; }
.steps h3 { font-size: 26px; margin-bottom: 8px; }
.steps p { margin: 0; color: var(--gris); font-size: 18px; }

.captioned { background: none; }
.captioned figcaption {
  border-top: 2px solid var(--azul); margin-top: 22px; padding-top: 14px;
  font-size: 13px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--azul);
}

.subblock { margin-top: clamp(72px, 9vw, 112px); }

/* Plans */
.plans { display: grid; grid-template-columns: 1.75fr 1fr; grid-template-rows: auto auto; gap: 24px; margin-top: 36px; }
.plan-main { grid-row: 1 / 3; }
.plan { margin: 0; background: var(--panel); padding: 22px; display: flex; flex-direction: column; cursor: zoom-in; }
.plan-sheet { background: #fff; flex: 1; display: flex; align-items: center; justify-content: center; padding: 10px; }
.plan-sheet img { max-height: 100%; width: 100%; object-fit: contain; }
.plan figcaption { font-size: 14px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--azul); padding: 16px 4px 2px; }

.metal-gallery { display: grid; grid-template-columns: 1.3fr 1fr; grid-template-rows: auto auto; gap: 20px; }
.metal-gallery .metal-tower { grid-column: 2; grid-row: 1 / 3; padding: 14px; }
.metal-gallery .ph { cursor: zoom-in; }
.metal-gallery .ph:first-child { align-self: end; }

/* Contact */
.contact-grid { margin-top: 56px; }
.vcard {
  border: 1px solid var(--linea); border-left: 8px solid var(--azul);
  padding: clamp(28px, 4vw, 44px); background: #fff;
  display: flex; flex-direction: column;
}
.vcard-brand { display: flex; align-items: center; gap: 10px; align-self: flex-end; margin-bottom: 32px; }
.vcard-brand img { height: 40px; width: auto; }
.vcard-brand span { border-left: 1px solid var(--azul); padding-left: 9px; font-size: 10px; line-height: 1.4; text-transform: uppercase; letter-spacing: .06em; color: var(--tinta); }
.vcard h3 { font-size: clamp(26px, 2.8vw, 34px); }
.vcard .role { color: var(--gris); margin: 8px 0 0; font-size: 17px; }
.vcard hr { border: 0; border-top: 1px solid var(--linea); margin: 24px 0 20px; }
.vline { text-decoration: none; font-size: 19px; color: var(--tinta); margin-bottom: 8px; width: fit-content; }
.vline:hover { color: var(--azul); text-decoration: underline; text-underline-offset: 3px; }
.btn-wa { margin-top: 22px; align-self: flex-start; }
.btn-wa svg { width: 18px; height: 18px; fill: currentColor; }

.territory { margin-top: 72px; border-top: 1px solid var(--linea); padding-top: 40px; }
.territory .lead { margin-top: 0; }

/* Footer */
.site-footer { border-top: 1px solid var(--linea); padding: 28px 0; font-size: 14px; color: var(--gris); }
.footer-inner { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.footer-tag { color: var(--azul); font-weight: 700; }

/* Lightbox */
.lightbox {
  position: fixed; inset: 0; z-index: 100; background: rgba(20,32,41,.92);
  display: flex; align-items: center; justify-content: center; padding: 24px;
}
.lightbox[hidden] { display: none; }
.lightbox img { max-width: 100%; max-height: 90vh; object-fit: contain; background: #fff; }
.lb-close { position: absolute; top: 14px; right: 18px; background: none; border: 0; color: #fff; font-size: 40px; cursor: pointer; line-height: 1; }

/* Reveal on scroll */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .grid-3 { grid-template-columns: 1fr; }
  .svc-card { padding: 28px; }
  .svc-top { min-height: 0; }
  .split-gestion, .split-hormigon, .split-metal { grid-template-columns: 1fr; }
  .panel-head { grid-template-columns: 1fr; gap: 12px; }
  .plans { grid-template-columns: 1fr 1fr; }
  .plan-main { grid-column: 1 / 3; grid-row: auto; }
}
@media (max-width: 820px) {
  .nav-toggle { display: block; }
  .nav {
    position: absolute; top: 76px; left: 0; right: 0; background: #fff;
    flex-direction: column; align-items: stretch; gap: 0;
    border-bottom: 1px solid var(--linea); padding: 8px var(--gutter) 20px;
    display: none;
  }
  .nav.open { display: flex; }
  .nav a { padding: 14px 0; border-bottom: 1px solid var(--linea); }
  .nav a::after { display: none; }
  .nav .nav-cta { margin-top: 14px; text-align: center; border: 0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .grid-2 { grid-template-columns: 1fr; }
  .tabs { flex-wrap: nowrap; overflow-x: auto; scrollbar-width: none; }
  .tabs button { white-space: nowrap; padding: 14px 16px; }
}
@media (max-width: 640px) {
  .brand-sub { display: none; }
  .hero { padding-top: 48px; min-height: auto; }
  .hero-sub { font-size: 11.5px; }
  .g-1-2, .g-fund { grid-template-columns: 1fr 1fr; grid-template-rows: none; height: auto; }
  .g-1-2 .ph, .g-fund .ph { aspect-ratio: 4 / 3; }
  .g-1-2 .ph-main { grid-column: 1 / 3; grid-row: auto; }
  .g-fund .ph-tall { grid-row: auto; aspect-ratio: 3 / 4; }
  .g-fund .ph:nth-child(3), .g-fund .ph:nth-child(4) { grid-column: auto; grid-row: auto; }
  .plans { grid-template-columns: 1fr; }
  .plan-main { grid-column: auto; }
  .metal-gallery { grid-template-columns: 1fr 1fr; }
  .steps li { grid-template-columns: 40px 1fr; }
  .vcard-brand { align-self: flex-start; }
  .btn { width: 100%; justify-content: center; }
  .btn-wa { align-self: stretch; }
}