/* =========================================================
   SIERRA RGC — Identidad de marca
   Paleta tomada de los logos oficiales:
   Navy (logotipo) + Amarillo dorado (isotipo)
   ========================================================= */
:root {
  --navy:        #0c2a45;   /* azul marino del logotipo */
  --navy-deep:   #081d31;   /* navy más profundo */
  --navy-soft:   #14395c;
  --gold:        #ffb300;   /* amarillo dorado del isotipo */
  --gold-deep:   #e89c00;
  --ink:         #1b2733;
  --muted:       #5b6b7a;
  --paper:       #ffffff;
  --paper-soft:  #f4f6f8;
  --line:        #e4e9ee;

  --font-sans:    'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --font-display: 'Space Grotesk', 'Inter', system-ui, sans-serif;

  --shadow-sm: 0 4px 14px rgba(12, 42, 69, .08);
  --shadow-md: 0 14px 40px rgba(12, 42, 69, .14);
  --radius: 14px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

html, body {
  max-width: 100%;
  overflow-x: hidden;
}

body {
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
}

/* el isotipo decorativo del hero nunca debe generar scroll horizontal */
.hero, .cta-banner { overflow-x: clip; }

/* anclas con offset para navbar fija */
section[id], header[id] { scroll-margin-top: 78px; }

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

a { text-decoration: none; }

/* ====================== TIPOGRAFÍA ====================== */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -.02em;
  line-height: 1.14;
}

.section-eyebrow {
  display: inline-block;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--gold-deep);
  margin-bottom: .9rem;
}
.section-eyebrow.light { color: var(--gold); }

.section-title {
  font-size: clamp(1.7rem, 3.5vw, 2.7rem);
  color: var(--navy);
  margin-bottom: 1.1rem;
}

.lead-muted { font-size: 1.12rem; color: var(--ink); margin-bottom: 1rem; }
.text-muted { color: var(--muted) !important; }

/* ====================== BOTONES ====================== */
.btn { border-radius: 50px; font-weight: 600; padding: .7rem 1.6rem; transition: all .25s ease; border: 0; }
.btn-lg { padding: .9rem 2.1rem; }

.btn-cta { background: var(--gold); color: var(--navy-deep); }
.btn-cta:hover { background: var(--gold-deep); color: var(--navy-deep); transform: translateY(-2px); box-shadow: var(--shadow-md); }

.btn-dark-sierra { background: var(--navy); color: #fff; }
.btn-dark-sierra:hover { background: var(--navy-deep); color: #fff; transform: translateY(-2px); }

.btn-ghost { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,.6); }
.btn-ghost:hover { background: #fff; color: var(--navy); border-color: #fff; }

.btn-ghost-dark { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,.4); }
.btn-ghost-dark:hover { background: rgba(255,255,255,.12); color: #fff; }

/* ====================== NAVBAR ====================== */
.sierra-nav {
  background: transparent;
  padding: 1rem 0;
  transition: background .35s ease, padding .35s ease, box-shadow .35s ease;
}
.sierra-nav.scrolled {
  background: var(--navy-deep);
  padding: .55rem 0;
  box-shadow: 0 6px 24px rgba(0,0,0,.25);
}
.brand-logo { height: 38px; width: auto; }
.sierra-nav .nav-link {
  color: #fff !important;
  font-weight: 600;
  font-size: .95rem;
  margin: 0 .35rem;
  position: relative;
  opacity: .92;
}
.sierra-nav .nav-link:hover { opacity: 1; color: var(--gold) !important; }
.sierra-nav .nav-link::after {
  content: ""; position: absolute; left: .5rem; right: .5rem; bottom: -2px;
  height: 2px; background: var(--gold); transform: scaleX(0); transform-origin: left;
  transition: transform .25s ease;
}
.sierra-nav .nav-link:hover::after { transform: scaleX(1); }

.navbar-toggler { border: 0; }
.navbar-toggler:focus { box-shadow: none; }

/* toggle de idioma */
.lang-toggle {
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.3);
  color: #fff; border-radius: 50px;
  padding: .35rem .8rem; font-weight: 700; font-size: .82rem;
  letter-spacing: .05em; cursor: pointer; transition: all .2s;
}
.lang-toggle:hover { background: rgba(255,255,255,.18); }
.lang-opt { opacity: .5; transition: opacity .2s, color .2s; }
.lang-opt.active { opacity: 1; color: var(--gold); }
.lang-sep { opacity: .4; margin: 0 .15rem; }

/* ====================== HERO ====================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background:
    linear-gradient(105deg, rgba(8,29,49,.92) 0%, rgba(12,42,69,.72) 45%, rgba(12,42,69,.34) 100%),
    url("../img/section/hero-bg.jpg"),
    var(--navy-deep);
  background-size: cover, cover, cover;
  background-position: center, center right, center;
  color: #fff;
  overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background-image: url("../img/logo/iso-white.png");
  background-repeat: no-repeat;
  background-position: right -80px bottom -60px;
  background-size: 520px;
  opacity: .05;
  pointer-events: none;
}
.hero-content { position: relative; z-index: 2; padding-top: 80px; }
.hero-eyebrow {
  display: inline-block; font-weight: 700; letter-spacing: .16em;
  text-transform: uppercase; font-size: .82rem; color: var(--gold);
  margin-bottom: 1.3rem; padding-bottom: .4rem; border-bottom: 2px solid rgba(255,179,0,.5);
}
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 6vw, 4.2rem);
  font-weight: 700;
  letter-spacing: -.03em;
  white-space: pre-line;
  margin-bottom: 1.4rem;
}
.hero-sub { font-size: clamp(1rem, 2vw, 1.25rem); max-width: 620px; color: rgba(255,255,255,.85); margin-bottom: 2.2rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 1rem; }

.hero-scroll {
  position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%);
  color: rgba(255,255,255,.7); font-size: 1.6rem; z-index: 2;
  animation: bounce 2s infinite;
}
@keyframes bounce { 0%,100%{transform:translate(-50%,0)} 50%{transform:translate(-50%,10px)} }

.hero-overlay { position: absolute; inset: 0; }

/* ====================== TRUST BAR ====================== */
.trust-bar { background: var(--navy); color: #fff; padding: 2.4rem 0; }
.trust-num { display: block; font-family: var(--font-display); font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 700; letter-spacing: -.02em; color: var(--gold); line-height: 1; }
.trust-label { display: block; font-size: .85rem; color: rgba(255,255,255,.75); margin-top: .4rem; }

/* ====================== SECCIONES ====================== */
.section { padding: clamp(3.5rem, 8vw, 6.5rem) 0; }
.section-light { background: var(--paper-soft); }
.section-dark { background: var(--navy); color: #fff; }
.section-dark .section-title { color: #fff; }

/* foto del equipo en Nosotros */
.about-photo { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-md); max-width: 420px; }
.about-photo img { width: 100%; display: block; transition: transform .5s ease; }
.about-photo:hover img { transform: scale(1.04); }

/* value cards (nosotros) */
.value-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.6rem; box-shadow: var(--shadow-sm); transition: transform .25s, box-shadow .25s;
}
.value-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.value-icon { font-size: 1.9rem; color: var(--gold-deep); margin-bottom: .7rem; display: block; }
.value-title { font-size: 1.15rem; color: var(--navy); margin-bottom: .5rem; }
.value-card p { font-size: .94rem; color: var(--muted); margin: 0; }

/* service cards */
.service-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 2rem 1.6rem; box-shadow: var(--shadow-sm);
  transition: transform .25s, box-shadow .25s, border-color .25s;
  position: relative; overflow: hidden;
}
.service-card::before {
  content: ""; position: absolute; top: 0; left: 0; width: 4px; height: 0;
  background: var(--gold); transition: height .3s ease;
}
.service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: transparent; }
.service-card:hover::before { height: 100%; }
.service-icon { font-size: 2.2rem; color: var(--navy); margin-bottom: 1rem; display: block; transition: color .25s; }
.service-card:hover .service-icon { color: var(--gold-deep); }
.service-card h3 { font-size: 1.18rem; color: var(--navy); margin-bottom: .6rem; }
.service-card p { font-size: .92rem; color: var(--muted); margin: 0; }

/* ====================== SERVICE CARD CON FOTO (fusión servicios+galería) ====================== */
.service-card-photo {
  position: relative; border-radius: var(--radius); overflow: hidden;
  aspect-ratio: 4 / 3; cursor: pointer; box-shadow: var(--shadow-sm);
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-soft) 100%);
  transition: transform .3s ease, box-shadow .3s ease;
}
.service-card-photo:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
/* la foto cubre toda la card */
.service-card-photo img {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; z-index: 1; transition: transform .5s ease;
}
.service-card-photo:hover img { transform: scale(1.07); }
/* degradado + textos */
.service-card-photo .scp-body {
  position: absolute; inset: 0; z-index: 2;
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: 1.2rem 1.3rem;
  background: linear-gradient(180deg, rgba(8,29,49,0) 40%, rgba(8,29,49,.55) 68%, rgba(8,29,49,.9) 100%);
  transition: background .35s ease;
}
.service-card-photo:hover .scp-body { background: linear-gradient(180deg, rgba(8,29,49,.1) 20%, rgba(8,29,49,.75) 70%, rgba(8,29,49,.95) 100%); }
.service-card-photo .scp-body h3 {
  color: #fff; font-size: 1.1rem; margin-bottom: .3rem; line-height: 1.2;
}
.service-card-photo .scp-body h3::before {
  content: ""; display: block; width: 26px; height: 3px; background: var(--gold); margin-bottom: .55rem;
}
.service-card-photo .scp-body p {
  color: rgba(255,255,255,.82); font-size: .82rem; margin: 0;
  max-height: 0; opacity: 0; overflow: hidden;
  transition: max-height .4s ease, opacity .3s ease, margin .3s ease;
}
.service-card-photo:hover .scp-body p { max-height: 6em; opacity: 1; margin-top: .3rem; }
/* icono de lupa al hover (reutiliza el patrón de galería) */
.service-card-photo::after {
  content: "\F470"; font-family: "bootstrap-icons"; font-size: 1.4rem; color: #fff;
  position: absolute; top: 1rem; right: 1rem; z-index: 3;
  opacity: 0; transform: scale(.7); transition: opacity .3s, transform .3s; pointer-events: none;
}
.service-card-photo:hover::after { opacity: .95; transform: scale(1); }

@media (max-width: 575.98px) {
  .service-card-photo .scp-body h3 { font-size: .95rem; }
  .service-card-photo .scp-body p { display: none; } /* en móvil, solo título para no saturar */
}

/* ====================== CTA BANNER ====================== */
.cta-banner {
  position: relative;
  padding: clamp(3.5rem, 8vw, 6rem) 0;
  background: linear-gradient(120deg, rgba(8,29,49,.95), rgba(12,42,69,.85)), var(--navy-deep);
  color: #fff; text-align: center;
}
.cta-banner-title { font-family: var(--font-display); font-weight: 600; font-size: clamp(1.7rem, 4.5vw, 2.9rem); letter-spacing: -.02em; }

/* ====================== GALERÍA ====================== */
.gallery-item { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); }
.gallery-ph {
  aspect-ratio: 4 / 3;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: .6rem;
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-soft) 100%);
  color: rgba(255,255,255,.85); transition: transform .35s ease;
}
.gallery-ph i { font-size: 2.4rem; color: var(--gold); }
.gallery-ph span { font-weight: 600; letter-spacing: .05em; text-transform: uppercase; font-size: .82rem; }
.gallery-item:hover .gallery-ph { transform: scale(1.05); }

/* fotos reales de obras */
.gallery-photo { position: relative; }
.gallery-photo img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
  transition: transform .5s ease;
}
.gallery-photo::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(8,29,49,0) 45%, rgba(8,29,49,.78) 100%);
  transition: background .35s ease;
}
.gallery-caption {
  position: absolute; left: 1rem; bottom: .85rem; z-index: 2;
  color: #fff; font-weight: 600; letter-spacing: .05em;
  text-transform: uppercase; font-size: .82rem;
}
.gallery-caption::before {
  content: ""; display: inline-block; width: 18px; height: 2px;
  background: var(--gold); margin-right: .5rem; vertical-align: middle;
}
.gallery-photo:hover img { transform: scale(1.07); }
.gallery-photo:hover::after { background: linear-gradient(180deg, rgba(8,29,49,.15) 20%, rgba(8,29,49,.82) 100%); }

/* la foto invita a hacer click */
.gallery-photo { cursor: pointer; }

/* filtros de categoría */
.gallery-filters { display: flex; flex-wrap: wrap; justify-content: center; gap: .6rem; }
.filter-btn {
  background: transparent; border: 1.5px solid var(--line); color: var(--navy);
  border-radius: 50px; padding: .45rem 1.2rem; font-weight: 600; font-size: .9rem;
  cursor: pointer; transition: all .2s ease;
}
.filter-btn:hover { border-color: var(--navy); }
.filter-btn.active { background: var(--navy); border-color: var(--navy); color: #fff; }
.gallery-col { transition: opacity .3s ease; }
.gallery-col.hide { display: none; }

/* ====================== CONTACTO ====================== */
.contact-list { list-style: none; padding: 0; margin: 1.6rem 0 0; }
.contact-list li { display: flex; gap: 1rem; align-items: flex-start; margin-bottom: 1.2rem; }
.contact-list i { font-size: 1.2rem; color: var(--gold); margin-top: .2rem; }
.contact-label { display: block; font-size: .78rem; text-transform: uppercase; letter-spacing: .08em; color: rgba(255,255,255,.55); }
.contact-list a, .contact-list span:not(.contact-label) { color: #fff; }
.contact-list a:hover { color: var(--gold); }

.contact-form {
  background: #fff; border-radius: var(--radius); padding: 2.2rem;
  box-shadow: var(--shadow-md);
}
.contact-form .form-label { font-weight: 600; color: var(--navy); font-size: .9rem; }
.contact-form .form-control, .contact-form .form-select {
  border-radius: 10px; border: 1px solid var(--line); padding: .7rem .9rem;
}
.contact-form .form-control:focus, .contact-form .form-select:focus {
  border-color: var(--gold); box-shadow: 0 0 0 .2rem rgba(255,179,0,.18);
}

.map-wrap { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-md); }
.map-wrap iframe { display: block; filter: grayscale(.15); }

/* ====================== FOOTER ====================== */
.sierra-footer { background: var(--navy-deep); color: rgba(255,255,255,.75); padding: 3.5rem 0 1.8rem; }
.footer-logo { height: 42px; }
.footer-tag { font-family: var(--font-display); font-weight: 500; font-size: 1.02rem; color: rgba(255,255,255,.8); max-width: 300px; }
.footer-title { font-size: .85rem; text-transform: uppercase; letter-spacing: .12em; color: #fff; margin-bottom: 1rem; }
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links li { margin-bottom: .55rem; }
.footer-links a, .footer-links span { color: rgba(255,255,255,.7); font-size: .92rem; }
.footer-links a:hover { color: var(--gold); }
.footer-social a {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: 50%;
  background: rgba(255,255,255,.08); color: #fff; margin-right: .5rem; font-size: 1.1rem;
  transition: all .25s;
}
.footer-social a:hover { background: var(--gold); color: var(--navy-deep); transform: translateY(-3px); }
.footer-divider { border-color: rgba(255,255,255,.12); margin: 2.2rem 0 1.2rem; }
.footer-copy { font-size: .82rem; color: rgba(255,255,255,.55); }

/* ====================== LIGHTBOX ====================== */
.lightbox {
  position: fixed; inset: 0; z-index: 2000;
  background: rgba(8,29,49,.94);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden; transition: opacity .3s ease, visibility .3s ease;
  padding: 2rem;
}
.lightbox.open { opacity: 1; visibility: visible; }
.lb-stage { display: flex; flex-direction: column; align-items: center; gap: .8rem; max-width: 94vw; }
.lb-figure { margin: 0; max-width: 92vw; text-align: center; }
.lb-figure img {
  max-width: 92vw; max-height: 68vh; width: auto; height: auto;
  border-radius: 8px; box-shadow: 0 20px 60px rgba(0,0,0,.5);
  transform: scale(.94); transition: transform .3s ease;
}
.lightbox.open .lb-figure img { transform: scale(1); }
.lb-caption {
  color: #fff; margin-top: 1rem; font-weight: 600; letter-spacing: .05em;
  text-transform: uppercase; font-size: .9rem;
}
.lb-caption::before {
  content: ""; display: inline-block; width: 20px; height: 2px;
  background: var(--gold); margin-right: .6rem; vertical-align: middle;
}
.lb-close, .lb-nav {
  position: absolute; background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.25);
  color: #fff; width: 48px; height: 48px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center; font-size: 1.3rem;
  cursor: pointer; transition: all .2s ease; z-index: 2;
}
.lb-close:hover, .lb-nav:hover { background: var(--gold); border-color: var(--gold); color: var(--navy-deep); }
.lb-close { top: 1.4rem; right: 1.4rem; }
.lb-nav { top: 50%; transform: translateY(-50%); }
.lb-prev { left: 1.4rem; }
.lb-next { right: 1.4rem; }
.lb-counter {
  color: rgba(255,255,255,.7); font-size: .85rem; font-weight: 600; letter-spacing: .1em;
}
/* tira de miniaturas por categoría */
.lb-thumbs {
  display: flex; gap: .5rem; flex-wrap: wrap; justify-content: center;
  max-width: 92vw; margin-top: .2rem;
}
.lb-thumb {
  width: 64px; height: 48px; border-radius: 6px; border: 2px solid transparent;
  background-size: cover; background-position: center; background-repeat: no-repeat;
  cursor: pointer; opacity: .55; padding: 0;
  transition: opacity .2s ease, border-color .2s ease, transform .2s ease;
}
.lb-thumb:hover { opacity: .85; transform: translateY(-2px); }
.lb-thumb.active { opacity: 1; border-color: var(--gold); }
@media (max-width: 575.98px) {
  .lb-nav { width: 40px; height: 40px; font-size: 1.1rem; }
  .lb-prev { left: .6rem; } .lb-next { right: .6rem; }
  .lb-close { top: .8rem; right: .8rem; }
}

/* ====================== WHATSAPP FLOTANTE ====================== */
.wa-float {
  position: fixed; right: 22px; bottom: 22px; z-index: 1030;
  width: 56px; height: 56px; border-radius: 50%;
  background: #25d366; color: #fff; font-size: 1.7rem;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 24px rgba(37,211,102,.45);
  transition: transform .25s;
}
.wa-float:hover { transform: scale(1.08); color: #fff; }

/* ====================== REVEAL ANIMATION ====================== */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ====================== RESPONSIVE ====================== */
@media (max-width: 991.98px) {
  .sierra-nav { background: var(--navy-deep); padding: .6rem 0; }
  .navbar-collapse {
    background: var(--navy-deep);
    margin-top: .7rem;
    padding: 1rem;
    border-radius: 12px;
    width: 100%;
  }
  /* los items del menú ocupan todo el ancho disponible, sin desbordar */
  .navbar-nav { width: 100%; }
  .sierra-nav .nav-item { width: 100%; }
  .sierra-nav .nav-link { margin: .25rem 0; width: 100%; }
  .sierra-nav .nav-link::after { display: none; }
  .nav-item.ms-lg-3, .nav-item.ms-lg-2 { margin-left: 0 !important; }
  .lang-toggle, .btn-cta#ctaNav {
    width: 100%;
    display: block;
    text-align: center;
  }
  .hero { min-height: 90vh; text-align: left; }
  .hero::before { background-size: 340px; opacity: .04; }
}

@media (max-width: 575.98px) {
  .hero-actions .btn { width: 100%; }
  .contact-form { padding: 1.5rem; }
  /* trust-bar: el texto no debe cortarse en columnas estrechas */
  .trust-bar { padding: 1.8rem 0; }
  .trust-label { font-size: .78rem; padding: 0 .35rem; }
  .wa-float { width: 50px; height: 50px; font-size: 1.5rem; right: 16px; bottom: 16px; }
  .footer-tag { max-width: none; }
}

/* respeta usuarios con preferencia de reducir movimiento */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}