/* ============================================================
   Corporativo Grupo Ríos — Hoja de estilos
   Identidad institucional derivada del logo oficial:
   azul marino #000063 · azul rey #0060F0 · verde #00A050 · hielo #D9E6F7
   Referentes de diseño: Veolia, Xylem, SUEZ, Aqualia (hero fotográfico,
   métricas de impacto, tarjetas por aplicación, casos con foto real).
   ============================================================ */

:root {
  /* Identidad (extraída del logo) */
  --marino-950: #00033f;
  --marino-900: #000063;
  --marino-800: #0a1f7a;
  --rey-600:    #0060f0;
  --rey-700:    #004fd0;
  --verde-600:  #00a050;
  --verde-700:  #008745;
  --hielo-100:  #eef4fc;
  --hielo-200:  #d9e6f7;

  /* Neutros */
  --ink:   #10173d;
  --slate: #45507a;
  --muted: #6a749c;
  --line:  #dfe6f2;
  --bg:    #ffffff;
  --bg-soft: #f6f9fd;
  --white: #ffffff;

  /* Aviso */
  --warn-bg: #fff7ed;
  --warn-line: #fdba74;
  --warn-ink: #9a3412;

  /* Tipografía */
  --font: "Manrope", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  /* Layout */
  --maxw: 1180px;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 14px 40px -14px rgba(0, 6, 99, 0.28);
  --shadow-sm: 0 5px 18px -8px rgba(0, 6, 99, 0.30);
  --header-h: 72px;
}

/* ---------- Reset / base ---------- */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 12px); }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: var(--rey-600); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.12; color: var(--marino-900); font-weight: 800; letter-spacing: -0.015em; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

.skip-link {
  position: absolute; left: -999px; top: 0; background: var(--marino-900);
  color: #fff; padding: 10px 16px; z-index: 200; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* ---------- Botones ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-weight: 700; font-size: 1rem; padding: 14px 28px; border-radius: 999px;
  border: 2px solid transparent; cursor: pointer;
  transition: transform .15s ease, background .2s ease, box-shadow .2s ease;
  text-decoration: none; white-space: nowrap;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }
.btn-primary { background: var(--verde-600); color: #fff; border-color: var(--verde-600); }
.btn-primary:hover { background: var(--verde-700); border-color: var(--verde-700); box-shadow: 0 10px 24px -8px rgba(0,135,69,.55); }
.btn-ghost { background: rgba(255,255,255,.06); color: #fff; border-color: rgba(255,255,255,.55); backdrop-filter: blur(2px); }
.btn-ghost:hover { background: rgba(255,255,255,.16); }
.btn-sm { padding: 10px 20px; font-size: .92rem; }
.btn-block { width: 100%; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.94); backdrop-filter: saturate(150%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; gap: 20px; height: var(--header-h); }
.brand { display: flex; align-items: center; gap: 12px; }
.brand:hover { text-decoration: none; }
.brand-logo { width: 46px; height: 46px; object-fit: contain; }
.brand-text { display: flex; flex-direction: column; line-height: 1.08; }
.brand-text strong { color: var(--marino-900); font-size: 1.12rem; font-weight: 800; letter-spacing: -0.01em; }
.brand-text small { color: var(--muted); font-size: .72rem; letter-spacing: .4px; font-weight: 600; }

.main-nav { display: flex; gap: 2px; margin-left: auto; }
.main-nav a {
  color: var(--slate); font-weight: 600; font-size: .95rem;
  padding: 9px 13px; border-radius: 9px;
}
.main-nav a:hover { color: var(--marino-900); background: var(--hielo-100); text-decoration: none; }

.header-actions { display: flex; align-items: center; gap: 10px; }
.lang-toggle {
  background: var(--hielo-100); border: 1px solid var(--line); color: var(--marino-900);
  font-family: inherit; font-weight: 800; font-size: .82rem; padding: 8px 12px; border-radius: 9px; cursor: pointer;
  min-width: 46px;
}
.lang-toggle:hover { background: var(--hielo-200); }

.nav-toggle { display: none; background: none; border: 0; cursor: pointer; width: 42px; height: 42px; padding: 9px; }
.nav-toggle span { display: block; height: 2px; background: var(--marino-900); border-radius: 2px; margin: 4px 0; transition: .25s; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------- Hero (foto real de obra + velo institucional) ---------- */
.hero { position: relative; color: #fff; overflow: hidden; }
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background-image:
    linear-gradient(100deg, rgba(0,3,63,.94) 0%, rgba(0,6,99,.86) 38%, rgba(0,31,122,.55) 68%, rgba(0,96,240,.28) 100%),
    url("../assets/img/hero.webp");
  background-size: cover;
  background-position: center 65%;
}
.hero-inner { position: relative; z-index: 1; padding: clamp(64px, 9vw, 128px) 24px clamp(52px, 7vw, 96px); max-width: var(--maxw); }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  text-transform: uppercase; letter-spacing: 1.6px; font-size: .78rem; font-weight: 700;
  color: #fff; background: rgba(0,160,80,.28); border: 1px solid rgba(0,200,110,.45);
  padding: 7px 14px; border-radius: 999px; margin-bottom: 22px;
}
.hero-title { color: #fff; font-size: clamp(2.1rem, 5.2vw, 3.6rem); max-width: 16ch; margin-bottom: 18px; }
.hero-sub { font-size: clamp(1.05rem, 2vw, 1.25rem); color: rgba(255,255,255,.92); max-width: 56ch; margin-bottom: 32px; font-weight: 500; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 44px; }

.hero-badges { list-style: none; display: flex; flex-wrap: wrap; gap: 14px; }
.hero-badges li {
  display: flex; flex-direction: column; padding: 14px 20px; border-radius: var(--radius-sm);
  background: rgba(255,255,255,.10); border: 1px solid rgba(255,255,255,.20); min-width: 160px;
  backdrop-filter: blur(3px);
}
.badge-num { font-weight: 800; font-size: 1.18rem; color: #fff; }
.hero-badges li span:last-child { color: rgba(255,255,255,.85); font-size: .85rem; }

/* ---------- Métricas ---------- */
.stats { background: var(--marino-900); position: relative; overflow: hidden; }
.stats::after {
  content: ""; position: absolute; right: -60px; top: -140px; width: 380px; height: 700px;
  background: url("../assets/img/marca-agua.webp") no-repeat center / contain; opacity: .5; pointer-events: none;
}
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; padding: 34px 24px; position: relative; z-index: 1; }
.stat { text-align: center; color: #fff; padding: 8px; }
.stat strong { display: block; font-size: clamp(1.5rem, 3.2vw, 2.3rem); color: #4ec98a; font-weight: 800; letter-spacing: -0.02em; }
.stat span { color: rgba(255,255,255,.78); font-size: .9rem; font-weight: 500; }

/* ---------- Secciones ---------- */
.section { padding: clamp(60px, 8vw, 104px) 0; }
.section-alt { background: var(--bg-soft); }
.section-eyebrow {
  text-transform: uppercase; letter-spacing: 1.6px; font-size: .76rem; font-weight: 800;
  color: var(--verde-600); margin-bottom: 12px;
}
.section-title { font-size: clamp(1.7rem, 3.4vw, 2.5rem); margin-bottom: 14px; }
.section-lead { color: var(--slate); max-width: 62ch; font-size: 1.06rem; }
.section-head { max-width: 760px; margin-bottom: 48px; }
.note { color: var(--muted); font-size: .85rem; font-style: italic; margin-top: 18px; }

/* ---------- Nosotros ---------- */
.about-grid { display: grid; grid-template-columns: 1.12fr .88fr; gap: 52px; align-items: center; }
.about-text p { color: var(--slate); margin-bottom: 16px; }
.quality-quote {
  border-left: 4px solid var(--verde-600); background: var(--hielo-100);
  padding: 20px 24px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; margin: 22px 0;
}
.quality-quote p { font-style: italic; color: var(--marino-800); margin-bottom: 8px; font-weight: 500; }
.quality-quote cite { font-style: normal; font-size: .82rem; color: var(--muted); font-weight: 600; }

.check-list { list-style: none; margin-top: 8px; display: grid; gap: 12px; }
.check-list li { position: relative; padding-left: 32px; color: var(--ink); font-weight: 500; }
.check-list li::before {
  content: ""; position: absolute; left: 0; top: 3px; width: 20px; height: 20px; border-radius: 50%;
  background: var(--verde-600);
  -webkit-mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'><path fill='white' d='M9 16.2 4.8 12l-1.4 1.4L9 19 21 7l-1.4-1.4z'/></svg>") center/70% no-repeat;
          mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'><path fill='white' d='M9 16.2 4.8 12l-1.4 1.4L9 19 21 7l-1.4-1.4z'/></svg>") center/70% no-repeat;
}

.about-media { position: relative; }
.about-photo { border-radius: var(--radius); box-shadow: var(--shadow); width: 100%; object-fit: cover; }
.about-caption {
  position: absolute; left: 16px; bottom: 16px; right: 16px;
  background: rgba(0,6,99,.82); color: #fff; border-radius: var(--radius-sm);
  padding: 10px 16px; font-size: .85rem; font-weight: 600; backdrop-filter: blur(4px);
}

/* Placeholders para imágenes aún pendientes */
.media-placeholder {
  position: relative; display: grid; place-items: center; text-align: center;
  background: repeating-linear-gradient(45deg, var(--hielo-100), var(--hielo-100) 12px, #e4edf8 12px, #e4edf8 24px);
  border: 1px dashed #b3c6de; border-radius: var(--radius); color: var(--muted);
  font-size: .85rem; padding: 24px; min-height: 220px;
}

/* ---------- Clientes ---------- */
.clients { background: var(--bg-soft); border-block: 1px solid var(--line); padding: 38px 0; }
.clients-title { text-align: center; font-size: .8rem; text-transform: uppercase; letter-spacing: 1.8px; color: var(--muted); font-weight: 800; margin-bottom: 20px; }
.clients-strip { list-style: none; display: flex; flex-wrap: wrap; justify-content: center; gap: 10px 14px; }
.clients-strip li {
  font-weight: 700; color: var(--marino-800); font-size: .95rem;
  background: var(--white); border: 1px solid var(--line); border-radius: 999px; padding: 8px 20px;
  box-shadow: 0 2px 6px -4px rgba(0,6,99,.18);
}

/* ---------- Sectores (rutas por tipo de cliente) ---------- */
.sectors-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.sector-card {
  background: linear-gradient(160deg, var(--marino-900), var(--marino-800) 70%, var(--rey-700));
  color: #fff; border-radius: var(--radius); padding: 30px 26px;
  display: flex; flex-direction: column; gap: 10px; position: relative; overflow: hidden;
}
.sector-card::after {
  content: ""; position: absolute; right: -70px; bottom: -110px; width: 240px; height: 440px;
  background: url("../assets/img/marca-agua.webp") no-repeat center / contain; opacity: .35; pointer-events: none;
}
.sector-card h3 { color: #fff; font-size: 1.22rem; }
.sector-card p { color: rgba(255,255,255,.85); font-size: .95rem; position: relative; z-index: 1; }
.sector-card a { color: #7ee0ac; font-weight: 700; font-size: .92rem; margin-top: auto; position: relative; z-index: 1; }

/* ---------- Tarjetas / Servicios ---------- */
.cards-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px 24px; transition: transform .18s ease, box-shadow .2s ease, border-color .2s ease;
}
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: #c4d8ee; }
.card-icon {
  width: 54px; height: 54px; border-radius: 14px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--hielo-100), var(--hielo-200)); color: var(--rey-600); margin-bottom: 16px;
}
.card-icon svg { width: 28px; height: 28px; }
.card h3 { font-size: 1.07rem; margin-bottom: 8px; }
.card p { color: var(--slate); font-size: .93rem; }

.supplies-strip {
  margin-top: 30px; padding: 18px 22px; background: var(--white); border: 1px solid var(--line);
  border-left: 4px solid var(--rey-600);
  border-radius: var(--radius-sm); color: var(--slate); font-size: .93rem;
}
.supplies-strip strong { color: var(--marino-900); }

/* ---------- Proyectos ---------- */
.projects-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.project-card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow-sm); display: flex; flex-direction: column;
  transition: transform .18s ease, box-shadow .2s ease;
}
.project-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.project-media { height: 200px; }
.project-media img { width: 100%; height: 100%; object-fit: cover; }
.project-media.media-placeholder { border: 0; border-radius: 0; min-height: 0; }
.project-body { padding: 20px 22px 24px; display: flex; flex-direction: column; gap: 8px; }
.tag {
  align-self: flex-start; background: var(--hielo-100); color: var(--rey-700);
  font-size: .72rem; font-weight: 800; text-transform: uppercase; letter-spacing: .7px;
  padding: 4px 12px; border-radius: 999px;
}
.project-body h3 { font-size: 1.1rem; }
.project-body p { color: var(--slate); font-size: .93rem; }

/* ---------- Galería ---------- */
.gallery-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.gallery-grid figure { margin: 0; border-radius: var(--radius-sm); overflow: hidden; position: relative; border: 1px solid var(--line); }
.gallery-grid img { width: 100%; height: 205px; object-fit: cover; display: block; transition: transform .25s ease; }
.gallery-grid figure:hover img { transform: scale(1.05); }
.gallery-grid figcaption {
  position: absolute; inset: auto 0 0 0; padding: 24px 12px 9px; font-size: .78rem; color: #fff; font-weight: 600;
  background: linear-gradient(transparent, rgba(0,3,63,.88)); text-transform: capitalize;
}

/* ---------- Certificaciones ---------- */
.certs-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 340px)); gap: 26px; justify-content: center; }
.cert-item { text-align: center; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 32px 24px; }
.cert-logo { width: 120px; height: 120px; margin: 0 auto 16px; border-radius: 18px; min-height: 0; font-weight: 800; color: var(--marino-800); }
.cert-item h3 { font-size: 1.2rem; margin-bottom: 6px; }
.cert-item p { color: var(--slate); font-size: .92rem; }
.cert-item p em { color: var(--muted); font-size: .82rem; }

/* ---------- Aviso de fraude ---------- */
.fraud { background: var(--warn-bg); border-top: 1px solid var(--warn-line); border-bottom: 1px solid var(--warn-line); }
.fraud-inner { display: grid; grid-template-columns: 64px 1fr; gap: 26px; align-items: start; }
.fraud-icon { color: var(--warn-ink); }
.fraud-icon svg { width: 56px; height: 56px; }
.fraud .section-title { color: var(--warn-ink); }
.fraud-body p { color: #7c2d12; margin-bottom: 14px; max-width: 72ch; }
.fraud-body a { color: var(--warn-ink); font-weight: 700; }

/* ---------- Contacto ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 52px; align-items: start; }
.contact-list { list-style: none; display: grid; gap: 16px; margin: 24px 0; }
.contact-list li { display: flex; flex-direction: column; gap: 2px; }
.ci-label { font-size: .72rem; text-transform: uppercase; letter-spacing: .9px; color: var(--muted); font-weight: 800; }
.contact-list a { font-weight: 600; }
.map { border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); margin-top: 20px; box-shadow: var(--shadow-sm); }
.map iframe { width: 100%; height: 260px; border: 0; display: block; }

.contact-form-wrap {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 32px; box-shadow: var(--shadow);
  border-top: 5px solid var(--verde-600);
}
.field { margin-bottom: 18px; display: flex; flex-direction: column; gap: 6px; }
.field label { font-weight: 700; font-size: .9rem; color: var(--marino-900); }
.field input, .field textarea {
  font-family: inherit; font-size: 1rem; padding: 13px 15px; border: 1px solid var(--line);
  border-radius: var(--radius-sm); background: var(--bg-soft); color: var(--ink); width: 100%;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.field input:focus, .field textarea:focus {
  outline: none; border-color: var(--rey-600); box-shadow: 0 0 0 3px rgba(0,96,240,.16); background: #fff;
}
.field textarea { resize: vertical; }
.form-hint { color: var(--muted); font-size: .82rem; text-align: center; margin-top: 12px; }
.hp { position: absolute; left: -5000px; } /* honeypot */

/* ---------- Footer ---------- */
.site-footer { background: var(--marino-950); color: rgba(255,255,255,.84); padding-top: 52px; position: relative; overflow: hidden; }
.site-footer::before {
  content: ""; position: absolute; left: -80px; bottom: -180px; width: 360px; height: 660px;
  background: url("../assets/img/marca-agua.webp") no-repeat center / contain; opacity: .35; pointer-events: none;
}
.footer-inner { display: grid; grid-template-columns: 1.4fr 1fr auto; gap: 32px; align-items: start; padding-bottom: 34px; position: relative; z-index: 1; }
.footer-brand { display: flex; gap: 14px; align-items: flex-start; }
.footer-logo { width: 52px; height: 52px; object-fit: contain; background: #fff; border-radius: 12px; padding: 4px; }
.footer-brand strong { color: #fff; font-size: 1rem; display: block; }
.footer-brand p { font-size: .9rem; color: rgba(255,255,255,.72); max-width: 40ch; }
.footer-nav { display: flex; flex-direction: column; gap: 8px; }
.footer-nav a, .footer-social a { color: rgba(255,255,255,.82); font-size: .92rem; font-weight: 500; }
.footer-nav a:hover, .footer-social a:hover { color: #fff; }
.footer-social { display: flex; flex-direction: column; gap: 8px; }
.footer-legal {
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px;
  border-top: 1px solid rgba(255,255,255,.14); padding-top: 20px; padding-bottom: 28px;
  font-size: .83rem; color: rgba(255,255,255,.62); position: relative; z-index: 1;
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .cards-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 34px; }
  .projects-grid { grid-template-columns: 1fr 1fr; }
  .sectors-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 18px; }
  .gallery-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 720px) {
  .main-nav {
    position: fixed; inset: var(--header-h) 0 auto 0; flex-direction: column; gap: 0;
    background: #fff; border-bottom: 1px solid var(--line); padding: 8px 16px 16px;
    transform: translateY(-120%); transition: transform .28s ease; box-shadow: var(--shadow);
  }
  .main-nav.open { transform: translateY(0); }
  .main-nav a { padding: 13px 8px; border-radius: 0; border-bottom: 1px solid var(--hielo-100); }
  .nav-toggle { display: block; }
  .header-actions .btn { display: none; }
  .cards-grid, .projects-grid, .certs-grid { grid-template-columns: 1fr; }
  .certs-grid { max-width: 360px; margin: 0 auto; }
  .fraud-inner { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: 1fr 1fr; }
  .hero-bg { background-position: 62% center; }
}

/* ---------- Accesibilidad ---------- */
@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}
:focus-visible { outline: 3px solid var(--rey-600); outline-offset: 2px; border-radius: 4px; }