/* IECA — Landing page | Mobile-first */
:root {
  --color-primary: #072155;      /* azul marino del logo */
  --color-primary-light: #11357e;
  --color-accent: #ffb400;       /* amarillo eléctrico */
  --color-whatsapp: #25d366;
  --color-ink: #1c2430;
  --color-muted: #5a6575;
  --color-bg: #ffffff;
  --color-bg-alt: #f2f5fa;
  --color-line: #dde3ec;
  --font-body: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --radius: 10px;
  --shadow: 0 4px 18px rgba(7, 33, 85, 0.10);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-ink);
  background: var(--color-bg);
}

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

h1, h2, h3 { line-height: 1.2; color: var(--color-primary); margin: 0 0 var(--space-2); }
h1 { font-size: clamp(1.7rem, 4.5vw + 0.6rem, 2.8rem); }
h2 { font-size: clamp(1.4rem, 3vw + 0.5rem, 2.1rem); }
h3 { font-size: 1.1rem; }
p { margin: 0 0 var(--space-2); }

a { color: var(--color-primary-light); }
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

.container { width: min(100% - 2.5rem, 72rem); margin-inline: auto; }
.container--narrow { width: min(100% - 2.5rem, 48rem); }

.section { padding-block: var(--space-5); }
.section--alt { background: var(--color-bg-alt); }
.section__lead { max-width: 46rem; color: var(--color-muted); margin-bottom: var(--space-4); }

/* ===== Botones ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1.5rem;
  border: 0;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
}
.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.btn--primary { background: var(--color-primary); color: #fff; }
.btn--primary:hover { background: var(--color-primary-light); }
.btn--whatsapp { background: var(--color-whatsapp); color: #fff; }
.btn--ghost { background: transparent; color: #fff; border: 2px solid rgba(255, 255, 255, 0.7); }
.btn--ghost:hover { border-color: #fff; }
.btn--email { background: var(--color-accent); color: var(--color-primary); }
.btn--email:hover { background: #ffc333; }
.contact__email-btn { margin-top: var(--space-2); }
.btn--lg { font-size: 1.1rem; padding: 1rem 1.8rem; }
.btn .icon { width: 1.4em; height: 1.4em; }

/* ===== Header ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-line);
}
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 0.6rem;
}
.header__brand img { width: 110px; height: auto; }

.nav__toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  padding: 0.5rem;
  cursor: pointer;
}
.nav__bar {
  width: 26px;
  height: 3px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.nav__toggle[aria-expanded="true"] .nav__bar:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] .nav__bar:nth-child(2) { opacity: 0; }
.nav__toggle[aria-expanded="true"] .nav__bar:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

.nav__list {
  list-style: none;
  margin: 0;
  padding: var(--space-2);
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-line);
  display: none;
  flex-direction: column;
  gap: var(--space-1);
}
.nav__list.is-open { display: flex; }
.nav__link {
  display: block;
  padding: 0.6rem 0.9rem;
  border-radius: var(--radius);
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: none;
}
.nav__link:hover { background: var(--color-bg-alt); }
.nav__link--cta { background: var(--color-accent); color: var(--color-primary); text-align: center; }
.nav__link--cta:hover { background: #ffc533; }

/* ===== Hero ===== */
.hero {
  background:
    linear-gradient(rgba(7, 33, 85, 0.82), rgba(7, 33, 85, 0.82)),
    url("../img/proyecto-alumbrado-publico-guatemala-800.webp") center / cover no-repeat;
  color: #fff;
}
.hero__inner { padding-block: var(--space-5); }
.hero__content { max-width: 40rem; }
.hero__kicker {
  color: var(--color-accent);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 0.85rem;
}
.hero h1 { color: #fff; }
.hero__text { color: #e8edf6; font-size: 1.05rem; }
.hero__actions { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-block: var(--space-3); }
.hero__stats {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
  margin: var(--space-3) 0 0;
  padding: 0;
  color: #cdd8ec;
  font-size: 0.9rem;
}
.hero__stats strong { display: block; font-size: 1.5rem; color: var(--color-accent); }

/* ===== Servicios ===== */
.grid { display: grid; gap: var(--space-2); }
.grid--services { grid-template-columns: 1fr; }
.card {
  background: var(--color-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: var(--space-3);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.card__icon { width: 2.2rem; height: 2.2rem; color: var(--color-accent); margin-bottom: var(--space-1); }
.card__title { font-size: 1.05rem; }
.card p { margin: 0; color: var(--color-muted); font-size: 0.95rem; }

/* ===== Beneficios ===== */
.grid--benefits { grid-template-columns: 1fr; }
.benefit {
  background: var(--color-bg);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: var(--space-2) var(--space-3);
  box-shadow: var(--shadow);
}
.benefit h3 { font-size: 1rem; margin-bottom: 0.3rem; }
.benefit p { margin: 0; color: var(--color-muted); font-size: 0.95rem; }

/* ===== Marcas / clientes ===== */
.brands {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-2);
}
.brands__item {
  display: grid;
  place-items: center;
  min-height: 90px;
  padding: var(--space-2);
  background: var(--color-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}
.brands__item img {
  max-width: 100%;
  max-height: 56px;
  width: auto;
  height: auto;
  filter: grayscale(1);
  opacity: 0.75;
  transition: filter 0.2s ease, opacity 0.2s ease;
}
.brands__item:hover img { filter: none; opacity: 1; }

/* ===== Galería de proyectos ===== */
.gallery { display: grid; gap: var(--space-2); grid-template-columns: 1fr 1fr; }
.gallery__item { margin: 0; position: relative; border-radius: var(--radius); overflow: hidden; }
.gallery__item img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 3 / 4; }
.gallery__item--wide { grid-column: 1 / -1; }
.gallery__item--wide img { aspect-ratio: 16 / 9; }
.gallery__item figcaption {
  position: absolute;
  inset: auto 0 0;
  padding: 0.5rem 0.8rem;
  background: linear-gradient(transparent, rgba(7, 33, 85, 0.85));
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
}

/* ===== Banner emergencias ===== */
.banner { background: var(--color-primary); color: #fff; padding-block: var(--space-4); }
.banner__inner { display: flex; flex-direction: column; gap: var(--space-2); align-items: flex-start; }
.banner__title { color: #fff; }
.banner__text { color: #cdd8ec; margin: 0; }
.banner__actions { display: flex; flex-wrap: wrap; gap: var(--space-2); }

/* ===== FAQ ===== */
.faq {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  margin-bottom: var(--space-1);
  background: var(--color-bg);
}
.faq summary {
  padding: var(--space-2) var(--space-3);
  font-weight: 700;
  color: var(--color-primary);
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 3rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.4rem;
  color: var(--color-accent);
}
.faq[open] summary::after { content: "−"; }
.faq p { padding: 0 var(--space-3) var(--space-2); margin: 0; color: var(--color-muted); }

/* ===== Contacto ===== */
.contact { display: grid; gap: var(--space-4); grid-template-columns: 1fr; }
.form__row { display: grid; gap: var(--space-2); grid-template-columns: 1fr; }
.form__field { margin-bottom: var(--space-2); }
.form__field label { display: block; font-weight: 600; margin-bottom: 0.3rem; font-size: 0.95rem; }
.form__field input,
.form__field select,
.form__field textarea {
  width: 100%;
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  font: inherit;
  background: var(--color-bg);
  color: var(--color-ink);
}
.form__field input:focus,
.form__field select:focus,
.form__field textarea:focus {
  outline: 3px solid var(--color-accent);
  outline-offset: 1px;
  border-color: var(--color-primary);
}
.form__field .is-invalid { border-color: #c0392b; }
.form__hp { position: absolute; left: -9999px; }
.form__privacy { font-size: 0.85rem; color: var(--color-muted); }
.form__status { font-weight: 600; min-height: 1.5em; }
.form__status.is-ok { color: #1e7d3c; }
.form__status.is-error { color: #c0392b; }

.contact__info address { font-style: normal; }
.contact__info p { margin-bottom: 0.5rem; }
.contact__map { margin-top: var(--space-2); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.contact__map iframe { width: 100%; height: 280px; border: 0; display: block; }

/* ===== Footer ===== */
.footer { background: var(--color-primary); color: #cdd8ec; padding-block: var(--space-4) var(--space-2); }
.footer a { color: #fff; }
.footer h3 { color: var(--color-accent); font-size: 1rem; }
.footer__inner { display: grid; gap: var(--space-3); grid-template-columns: 1fr; }
.footer__brand img { width: 100px; margin-bottom: var(--space-1); }
.footer__brand p, .footer__col p { font-size: 0.92rem; margin-bottom: 0.4rem; }
.footer__legal { border-top: 1px solid rgba(255, 255, 255, 0.15); margin-top: var(--space-3); padding-top: var(--space-2); font-size: 0.85rem; }

/* ===== WhatsApp flotante ===== */
.whatsapp-float {
  position: fixed;
  right: 1.1rem;
  bottom: 1.1rem;
  z-index: 60;
  width: 3.4rem;
  height: 3.4rem;
  display: grid;
  place-items: center;
  background: var(--color-whatsapp);
  color: #fff;
  border-radius: 50%;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.3);
  transition: transform 0.15s ease;
}
.whatsapp-float:hover { transform: scale(1.08); }
.whatsapp-float svg { width: 1.9rem; height: 1.9rem; }

/* ===== Animación al hacer scroll ===== */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.5s ease, transform 0.5s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn, .card, .whatsapp-float { transition: none; }
}

/* ===== Tablet ===== */
@media (min-width: 768px) {
  .nav__toggle { display: none; }
  .nav__list {
    position: static;
    display: flex;
    flex-direction: row;
    align-items: center;
    border: 0;
    padding: 0;
    gap: 0.2rem;
    background: transparent;
  }
  .grid--services { grid-template-columns: repeat(2, 1fr); }
  .grid--benefits { grid-template-columns: repeat(2, 1fr); }
  .brands { grid-template-columns: repeat(4, 1fr); }
  .gallery { grid-template-columns: repeat(3, 1fr); }
  .gallery__item--wide { grid-column: span 2; }
  .banner__inner { flex-direction: row; align-items: center; justify-content: space-between; }
  .contact { grid-template-columns: 1.2fr 1fr; }
  .form__row { grid-template-columns: 1fr 1fr; }
  .footer__inner { grid-template-columns: 1.4fr 1fr 1fr 0.8fr; }
  .hero {
    background-image:
      linear-gradient(100deg, rgba(7, 33, 85, 0.92) 35%, rgba(7, 33, 85, 0.55)),
      url("../img/proyecto-alumbrado-publico-guatemala.webp");
  }
}

/* ===== Escritorio ===== */
@media (min-width: 1100px) {
  .grid--services { grid-template-columns: repeat(3, 1fr); }
  .grid--benefits { grid-template-columns: repeat(3, 1fr); }
  .brands { grid-template-columns: repeat(7, 1fr); }
  .hero__inner { padding-block: 6.5rem; }
}