/* Parsion Environment & Engineering: estilos compartidos */

:root {
  /* Paleta del sitio original */
  --sage: #C9D6C9;
  --sage-soft: #EEF3EE;
  --petrol: #134256;
  --petrol-deep: #0B2D3C;
  --teal: #0BB4AA;
  --teal-dark: #08827B;
  --ink: #1F3440;
  --muted: #52646B;
  --white: #FFFFFF;

  --s1: 8px;
  --s2: 16px;
  --s3: 24px;
  --s4: 48px;
  --s5: 80px;

  --wrap: 1200px;
  --measure: 720px;
  --header-h: 76px;
  --radius: 8px;
  --ease: cubic-bezier(.2, .7, .2, 1);

  --z-header: 50;
  --z-lightbox: 100;

  --font: "Onest", system-ui, -apple-system, "Segoe UI", sans-serif;
}

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + var(--s2)); }

body {
  margin: 0;
  background: var(--white);
  color: var(--ink);
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.65;
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
}

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

h1, h2, h3 {
  margin: 0 0 var(--s2);
  color: var(--petrol);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.015em;
  text-wrap: balance;
}
h1 { font-size: clamp(2.25rem, 1.5rem + 3.2vw, 4rem); }
h2 { font-size: clamp(1.75rem, 1.35rem + 1.6vw, 2.5rem); }
h3 { font-size: 1.1875rem; }

p { margin: 0 0 var(--s2); }
p:last-child { margin-bottom: 0; }

a { color: var(--petrol); text-decoration-color: var(--teal); text-decoration-thickness: 2px; text-underline-offset: 3px; }
a:hover { color: var(--teal-dark); }

:focus-visible { outline: 3px solid var(--teal); outline-offset: 3px; border-radius: 2px; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip-path: inset(50%); white-space: nowrap;
}

.skip-link {
  position: absolute; left: var(--s2); top: -100px; z-index: calc(var(--z-header) + 1);
  padding: var(--s1) var(--s2); background: var(--petrol); color: var(--white); border-radius: var(--radius);
}
.skip-link:focus { top: var(--s1); }

.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: var(--s2); }
@media (min-width: 768px) { .wrap { padding-inline: var(--s3); } }

.prose { max-width: var(--measure); }
.lead { font-size: 1.1875rem; }
.rounded { border-radius: var(--radius); }

/* ---------- Header ---------- */

.site-header {
  position: sticky; top: 0; z-index: var(--z-header);
  background: var(--sage);
  box-shadow: 0 1px 0 rgba(19, 66, 86, 0.12);
  transition: background-color .3s var(--ease), box-shadow .3s var(--ease);
}
/* Sobre el hero o el banner: fijo y transparente hasta que se hace scroll */
.site-header[data-overlay] { position: fixed; left: 0; right: 0; }

.site-header .wrap {
  position: relative;
  display: flex; align-items: center; gap: var(--s3);
  min-height: var(--header-h);
}

.brand { position: relative; display: flex; align-items: center; flex-shrink: 0; }
.brand img { width: auto; height: 52px; transition: opacity .3s var(--ease); }
.brand .brand-light { position: absolute; left: 0; top: 50%; transform: translateY(-50%); opacity: 0; }

.site-nav { margin-left: auto; }
.site-nav ul { display: flex; align-items: center; gap: 4px; margin: 0; padding: 0; list-style: none; }
.site-nav a {
  position: relative; display: block; padding: var(--s1) 14px;
  color: var(--petrol); font-weight: 500; text-decoration: none; white-space: nowrap;
  transition: color .2s var(--ease);
}
.site-nav a::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 2px; height: 2px;
  background: var(--teal); border-radius: 2px;
  transform: scaleX(0); transform-origin: left; transition: transform .25s var(--ease);
}
.site-nav a:hover::after, .site-nav a[aria-current="page"]::after { transform: scaleX(1); }

.lang { display: flex; align-items: center; gap: 2px; padding-left: var(--s2); border-left: 1px solid rgba(19, 66, 86, 0.25); }
.lang a {
  display: grid; place-items: center; min-width: 36px; height: 32px; padding-inline: 6px;
  color: var(--petrol); font-size: 0.875rem; font-weight: 600; text-decoration: none; border-radius: 6px;
  transition: background-color .2s var(--ease), color .2s var(--ease);
}
.lang a:hover { background: rgba(255, 255, 255, 0.5); }
.lang a[aria-current="true"] { background: var(--petrol); color: var(--white); }

.nav-toggle {
  display: none;
  width: 44px; height: 44px; padding: 0; margin-left: var(--s1);
  background: transparent; border: 0; border-radius: 6px; color: var(--petrol); cursor: pointer;
}
.nav-toggle svg { margin: auto; }
.nav-toggle .icon-close { display: none; }
.nav-toggle[aria-expanded="true"] .icon-open { display: none; }
.nav-toggle[aria-expanded="true"] .icon-close { display: block; }

/* Estado transparente (solo con JS, y mientras el menú móvil esté cerrado) */
.js .site-header[data-overlay]:not(.is-solid):not(.menu-open) {
  background: transparent;
  box-shadow: none;
}
.js .site-header[data-overlay]:not(.is-solid):not(.menu-open) .brand-dark { opacity: 0; }
.js .site-header[data-overlay]:not(.is-solid):not(.menu-open) .brand-light { opacity: 1; }
.js .site-header[data-overlay]:not(.is-solid):not(.menu-open) :is(.site-nav a, .lang a, .nav-toggle) { color: var(--white); }
.js .site-header[data-overlay]:not(.is-solid):not(.menu-open) .lang { border-color: rgba(255, 255, 255, 0.4); }
.js .site-header[data-overlay]:not(.is-solid):not(.menu-open) .lang a:hover { background: rgba(255, 255, 255, 0.18); }
.js .site-header[data-overlay]:not(.is-solid):not(.menu-open) .lang a[aria-current="true"] { background: var(--white); color: var(--petrol); }

@media (max-width: 959px) {
  :root { --header-h: 64px; }
  .brand img { height: 42px; }
  .site-header .wrap { gap: var(--s1); flex-wrap: wrap; }
  .lang { margin-left: auto; padding-left: 0; border-left: 0; }

  /* Sin JS el menú queda visible en una segunda fila */
  .site-nav { order: 3; width: 100%; margin-left: 0; }
  .site-nav ul { flex-wrap: wrap; padding-bottom: var(--s1); }

  .js .nav-toggle { display: grid; }
  .js .site-nav {
    display: none;
    position: absolute; top: 100%; left: 0; right: 0;
    background: var(--sage);
    box-shadow: 0 16px 24px rgba(11, 45, 60, 0.18);
  }
  .js .site-nav.is-open { display: block; }
  .js .site-nav ul { flex-direction: column; align-items: stretch; gap: 0; padding: var(--s1) var(--s2) var(--s2); }
  .js .site-nav a { padding: 14px var(--s1); border-bottom: 1px solid rgba(19, 66, 86, 0.12); }
  .js .site-nav li:last-child a { border-bottom: 0; }
  .js .site-nav a::after { left: 0; right: auto; top: 12px; bottom: 12px; width: 3px; height: auto; transform: scaleY(0); }
  .js .site-nav a[aria-current="page"] { padding-left: var(--s2); }
  .js .site-nav a[aria-current="page"]::after { transform: scaleY(1); }
}

/* ---------- Botones ---------- */

.button {
  display: inline-flex; align-items: center; justify-content: center; min-height: 48px;
  padding: 12px var(--s3);
  background: var(--petrol); color: var(--white); border: 2px solid transparent;
  font-family: inherit; font-size: 1rem; font-weight: 600; text-decoration: none; border-radius: var(--radius); cursor: pointer;
  transition: background-color .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}
.button:hover { background: var(--petrol-deep); color: var(--white); }
.button--light { background: var(--white); color: var(--petrol); }
.button--light:hover { background: var(--sage); color: var(--petrol-deep); }
.button--ghost { background: transparent; color: var(--white); border-color: rgba(255, 255, 255, 0.7); }
.button--ghost:hover { background: rgba(255, 255, 255, 0.14); border-color: var(--white); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; }

.more { font-weight: 600; }

/* ---------- Secciones ---------- */

.section { padding-block: var(--s4); }
@media (min-width: 768px) { .section { padding-block: var(--s5); } }
.section--tint { background: var(--sage-soft); }

.section-head { max-width: var(--measure); margin-bottom: var(--s4); }
.section-foot { margin-top: var(--s4); }

/* ---------- Hero del inicio ---------- */

.hero {
  position: relative; display: grid; align-items: end;
  min-height: max(560px, 88vh);
  background: var(--petrol-deep);
  color: var(--white);
  overflow: hidden;
}
/* El archivo trae franjas negras de 33 px arriba y abajo (sobre 1080): el scale las deja fuera de cuadro */
.hero video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 48% 57%; transform: scale(1.07); }
.hero::before, .hero::after { content: ""; position: absolute; inset: 0; pointer-events: none; }
/* Arriba: legibilidad del header transparente. Abajo: legibilidad del título */
.hero::before { background: linear-gradient(180deg, rgba(11, 45, 60, 0.55) 0, rgba(11, 45, 60, 0) 180px); z-index: 1; }
.hero::after { background: linear-gradient(180deg, rgba(11, 45, 60, 0) 35%, rgba(11, 45, 60, 0.82) 100%); }
.hero .wrap { position: relative; z-index: 2; padding-top: calc(var(--header-h) + var(--s4)); padding-bottom: var(--s5); }
.hero h1 { color: var(--white); margin-bottom: var(--s2); }
.hero-sep { color: var(--teal); font-weight: 400; }
.hero-line { display: block; font-weight: 500; }
@media (min-width: 768px) { .hero-line { display: inline; } }
.hero p { max-width: 40ch; font-size: clamp(1.125rem, 1rem + .5vw, 1.375rem); margin-bottom: var(--s4); color: rgba(255, 255, 255, 0.92); }

/* Única animación de carga: el bloque del hero entra escalonado */
@media (prefers-reduced-motion: no-preference) {
  .hero .wrap > * { animation: rise .9s var(--ease) both; }
  .hero .wrap > :nth-child(2) { animation-delay: .15s; }
  .hero .wrap > :nth-child(3) { animation-delay: .3s; }
  .hero video { animation: fade 1.2s ease both; }
}
@keyframes rise { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: none; } }
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }

/* ---------- Banner de páginas internas ---------- */

.page-banner {
  position: relative; display: grid; align-items: end;
  min-height: calc(var(--header-h) + 240px);
  background: var(--petrol-deep) center / cover no-repeat;
  color: var(--white);
}
.page-banner::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(11, 45, 60, 0.6) 0, rgba(11, 45, 60, 0.2) 45%, rgba(11, 45, 60, 0.8) 100%);
}
.page-banner .wrap { position: relative; padding-block: calc(var(--header-h) + var(--s3)) var(--s4); }
.page-banner h1 { color: var(--white); margin: 0; }
@media (min-width: 768px) { .page-banner { min-height: calc(var(--header-h) + 300px); } }
.page-banner--plain { min-height: calc(var(--header-h) + 180px); }

/* ---------- Grillas ---------- */

.split { display: grid; gap: var(--s4); align-items: center; }
@media (min-width: 900px) { .split { grid-template-columns: 1fr 1fr; gap: var(--s5); } }
.split > img { width: 100%; }

/* Tarjetas de servicios */
.service-grid { display: grid; gap: var(--s4) var(--s3); grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr)); margin: 0; padding: 0; list-style: none; }
.service-card a { display: block; height: 100%; color: inherit; text-decoration: none; }
.service-card .media { position: relative; display: block; overflow: hidden; border-radius: var(--radius); background: var(--sage); }
.service-card .media::after { content: ""; position: absolute; inset: 0; background: var(--petrol-deep); opacity: 0; transition: opacity .35s var(--ease); }
.service-card img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; transition: transform .6s var(--ease); }
.service-card h3 { margin: var(--s2) 0 6px; transition: color .2s var(--ease); }
.service-card p { color: var(--muted); font-size: 0.9688rem; line-height: 1.55; }
@media (hover: hover) {
  .service-card a:hover img { transform: scale(1.05); }
  .service-card a:hover .media::after { opacity: .25; }
  .service-card a:hover h3 { color: var(--teal-dark); }
}

/* Collage de proyectos */
.collage {
  display: grid; grid-template-columns: repeat(2, 1fr); grid-auto-rows: 150px; grid-auto-flow: dense;
  gap: 10px; margin: 0; padding: 0; list-style: none;
}
@media (min-width: 600px) { .collage { grid-auto-rows: 200px; } }
@media (min-width: 900px) { .collage { grid-template-columns: repeat(4, 1fr); grid-auto-rows: 210px; gap: 14px; } }
@media (min-width: 1200px) { .collage { grid-auto-rows: 240px; } }
.collage .big { grid-column: span 2; grid-row: span 2; }
.collage .wide { grid-column: span 2; }
.collage .tall { grid-row: span 2; }

.tile {
  position: relative; display: block; height: 100%; overflow: hidden;
  border-radius: var(--radius); background: var(--petrol-deep); color: var(--white); text-decoration: none; cursor: zoom-in;
}
.tile:hover { color: var(--white); }
.tile img { width: 100%; height: 100%; object-fit: cover; transition: transform .7s var(--ease), opacity .4s var(--ease); }
.tile-info {
  position: absolute; inset: auto 0 0 0; display: block;
  padding: var(--s3) var(--s2) var(--s2);
  background: linear-gradient(180deg, rgba(11, 45, 60, 0), rgba(11, 45, 60, 0.85));
  line-height: 1.35;
}
.tile-info strong { display: block; font-weight: 600; font-size: 0.9375rem; }
.tile-info span { display: none; }
.tile:focus-visible { outline-offset: 2px; }

@media (hover: hover) {
  .tile::after {
    content: ""; position: absolute; inset: 0; pointer-events: none;
    background: var(--petrol-deep); opacity: 0; transition: opacity .4s var(--ease);
  }
  .tile-info {
    z-index: 1; background: none; padding: var(--s3);
    transform: translateY(8px); opacity: 0;
    transition: opacity .35s var(--ease), transform .35s var(--ease);
  }
  .tile-info strong { font-size: 1.0625rem; margin-bottom: 6px; }
  .tile-info span { display: block; font-size: 0.9375rem; color: rgba(255, 255, 255, 0.88); }
  .tile:is(:hover, :focus-visible) img { transform: scale(1.06); }
  .tile:is(:hover, :focus-visible)::after { opacity: .72; }
  .tile:is(:hover, :focus-visible) .tile-info { opacity: 1; transform: none; }
}

/* Lightbox */
.lightbox {
  width: 100%; max-width: none; height: 100%; max-height: none; margin: 0; padding: 0; border: 0;
  background: rgba(6, 24, 32, 0.94); color: var(--white);
}
.lightbox[open] { display: grid; grid-template-columns: 64px 1fr 64px; align-items: center; }
.lightbox::backdrop { background: transparent; }
.lightbox figure { grid-column: 2; margin: 0; display: grid; justify-items: center; gap: var(--s2); padding: var(--s4) 0; min-width: 0; }
.lightbox img { max-width: 100%; max-height: calc(100vh - 180px); width: auto; height: auto; border-radius: 4px; }
.lightbox figcaption { max-width: 72ch; text-align: center; font-size: 0.9375rem; color: rgba(255, 255, 255, 0.85); }
.lightbox figcaption strong { display: block; color: var(--white); font-size: 1.0625rem; margin-bottom: 4px; }
.lightbox button {
  display: grid; place-items: center; width: 48px; height: 48px; margin: auto; padding: 0;
  background: rgba(255, 255, 255, 0.1); color: var(--white); border: 0; border-radius: 50%; cursor: pointer;
  transition: background-color .2s var(--ease);
}
.lightbox button:hover { background: rgba(255, 255, 255, 0.22); }
.lightbox .lb-close { position: absolute; top: var(--s2); right: var(--s2); }
.lightbox .lb-prev { grid-column: 1; grid-row: 1; }
.lightbox .lb-next { grid-column: 3; grid-row: 1; }
@media (max-width: 599px) {
  .lightbox[open] { grid-template-columns: 1fr 1fr; grid-template-rows: 1fr auto; }
  .lightbox figure { grid-column: 1 / -1; grid-row: 1; padding: var(--s5) var(--s2) 0; }
  .lightbox .lb-prev, .lightbox .lb-next { grid-row: 2; margin-block: var(--s2); }
  .lightbox .lb-prev { grid-column: 1; }
  .lightbox .lb-next { grid-column: 2; }
}

/* ---------- Destacado ESMADA Air ---------- */

.feature { background: var(--petrol); color: rgba(255, 255, 255, 0.9); }
.feature h2 { color: var(--white); }
.feature .button { margin-top: var(--s2); }
.award { display: inline-flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-bottom: var(--s3); font-size: 0.9375rem; }
.award img { height: 46px; width: auto; max-width: 100%; padding: 8px 12px; object-fit: contain; background: var(--white); border-radius: 6px; }

/* ---------- Servicios (página) ---------- */

.service-list { display: grid; gap: var(--s4) var(--s5); margin: 0; padding: 0; list-style: none; }
@media (min-width: 900px) { .service-list { grid-template-columns: 1fr 1fr; } }
.service-list > li { padding-top: var(--s3); border-top: 2px solid var(--sage); }
.service-list ul { margin: 0; padding-left: 1.1em; }
.service-list ul li { margin-bottom: 6px; }
.service-list ul li::marker { color: var(--teal); }

/* ---------- Nosotros ---------- */

.quote { margin: var(--s4) 0; padding-left: var(--s3); border-left: 3px solid var(--teal); max-width: var(--measure); }
.quote p { font-size: 1.375rem; line-height: 1.4; color: var(--petrol); }
.quote cite { display: block; margin-top: var(--s1); font-style: normal; color: var(--muted); }

.values { display: grid; gap: var(--s3) var(--s4); grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr)); margin: 0; }
.values div { padding-top: var(--s2); border-top: 2px solid var(--sage); }
.values dt { margin-bottom: var(--s1); font-weight: 600; font-size: 1.1875rem; color: var(--petrol); }
.values dd { margin: 0; }

.closing { max-width: 30ch; font-size: clamp(1.5rem, 1.2rem + 1.4vw, 2.25rem); line-height: 1.3; font-weight: 500; }

/* ---------- Contacto ---------- */

.contact-layout { display: grid; gap: var(--s4); align-items: start; }
@media (min-width: 960px) { .contact-layout { grid-template-columns: 1fr 1.15fr; gap: var(--s5); } }
.contact-layout .contact-grid { margin-top: var(--s4); grid-template-columns: repeat(auto-fill, minmax(min(100%, 200px), 1fr)); gap: var(--s3); }

.contact-form {
  display: grid; gap: var(--s2);
  padding: var(--s3); background: var(--sage-soft); border: 1px solid rgba(19, 66, 86, 0.1); border-radius: 12px;
}
@media (min-width: 768px) { .contact-form { padding: var(--s4); } }
.contact-form .form-title { font-size: 1.375rem; margin-bottom: var(--s1); }
.field-row { display: grid; gap: var(--s2); }
@media (min-width: 600px) { .field-row { grid-template-columns: 1fr 1fr; align-items: end; } }
.field { display: grid; gap: 6px; font-size: 0.9375rem; font-weight: 500; color: var(--petrol); }
.field :is(input, select, textarea) {
  width: 100%; min-height: 48px; padding: 10px 12px;
  font: inherit; font-weight: 400; font-size: 1rem; color: var(--ink);
  background: var(--white); border: 1px solid rgba(19, 66, 86, 0.25); border-radius: 6px;
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.field textarea { resize: vertical; min-height: 140px; }
.field :is(input, select, textarea):focus { outline: none; border-color: var(--teal); box-shadow: 0 0 0 3px rgba(11, 180, 170, 0.25); }
.contact-form .button { justify-self: start; }
.form-note { font-size: 0.875rem; color: var(--muted); }

.contact-grid { display: grid; gap: var(--s4); grid-template-columns: repeat(auto-fill, minmax(min(100%, 240px), 1fr)); margin: 0; }
.contact-grid dt { margin-bottom: var(--s1); font-weight: 600; color: var(--petrol); }
.contact-grid dd { margin: 0 0 4px; }

/* ---------- Llamado a la acción ---------- */

.cta {
  position: relative;
  background: var(--petrol) url("../img/cta-fondo.webp") center / cover no-repeat;
  color: var(--white);
}
.cta::before { content: ""; position: absolute; inset: 0; background: rgba(11, 45, 60, 0.84); }
.cta .wrap { position: relative; }
.cta h2 { color: var(--white); }
.cta p { max-width: var(--measure); }
.cta .button { margin-top: var(--s3); }

/* ---------- Footer ---------- */

.site-footer { background: var(--sage-soft); border-top: 1px solid rgba(19, 66, 86, 0.12); padding-block: var(--s4) var(--s3); font-size: 0.9375rem; }
.footer-grid { display: grid; gap: var(--s4) var(--s3); grid-template-columns: repeat(auto-fit, minmax(min(100%, 180px), 1fr)); }
.footer-grid h2 { margin-bottom: var(--s1); font-size: 1rem; }
.footer-grid ul { margin: 0; padding: 0; list-style: none; }
.footer-grid li { margin-bottom: 4px; }
a[href^="tel:"] { white-space: nowrap; }
.footer-brand { grid-column: 1 / -1; }
@media (min-width: 1000px) { .footer-grid { grid-template-columns: 1.4fr repeat(4, 1fr); } .footer-brand { grid-column: auto; } }
.footer-brand img { width: auto; height: 56px; margin-bottom: var(--s2); }
.footer-brand p { color: var(--muted); max-width: 36ch; }
.footer-bottom { margin-top: var(--s4); padding-top: var(--s3); border-top: 1px solid rgba(19, 66, 86, 0.12); color: var(--muted); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}