/* ===================================================================
   Comercializadora NUA — estilos
   Paleta industrial: negro grafito + acero + acento ámbar (señalética)
   =================================================================== */

:root {
  --ink: #0e0f12;
  --ink-2: #16181d;
  --steel: #1f2329;
  --steel-line: #2c313a;
  --concrete: #e7e5e1;
  --concrete-2: #f3f1ed;
  --text: #14151a;
  --muted: #6b7280;
  --muted-light: #9aa3af;
  --amber: #f5a623;       /* señalética / acento minería */
  --amber-deep: #e08e00;
  --wa: #25d366;
  --white: #ffffff;
  --maxw: 1180px;
  --radius: 4px;
  --shadow: 0 18px 40px rgba(0,0,0,.18);
  --hairline: 1px solid var(--steel-line);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: "Inter", system-ui, sans-serif;
  color: var(--text);
  background: var(--concrete-2);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, .brand-mark {
  font-family: "Oswald", "Inter", sans-serif;
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: .01em;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

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

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  font-family: "Oswald", sans-serif; font-weight: 500; letter-spacing: .04em;
  text-transform: uppercase; font-size: 14px;
  padding: 14px 26px; border-radius: var(--radius); border: 2px solid transparent;
  cursor: pointer; transition: transform .12s ease, background .2s ease, color .2s ease, border-color .2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--amber); color: #1a1205; }
.btn-primary:hover { background: var(--amber-deep); }
.btn-ghost { background: transparent; color: var(--white); border-color: rgba(255,255,255,.4); }
.btn-ghost:hover { border-color: var(--white); }
.btn-dark { background: var(--ink); color: var(--white); }
.btn-dark:hover { background: #000; }
.btn-block { width: 100%; }
.btn-wa { background: var(--wa); color: #053b1c; }
.btn-wa:hover { background: #1fb858; }
.btn-call { background: transparent; color: var(--white); border-color: rgba(255,255,255,.35); }
.btn-call:hover { border-color: var(--white); }
.btn-call--light { color: var(--ink); border-color: rgba(0,0,0,.25); }
.btn-call--light:hover { border-color: var(--ink); }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: #ffffff;
  border-bottom: 1px solid #e3e0da;
  box-shadow: 0 2px 8px rgba(0,0,0,.06);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; }
.brand-logo { height: 44px; width: auto; display: block; }
.main-nav { display: flex; align-items: center; gap: 28px; }
.main-nav a { color: var(--text); font-size: 14px; font-weight: 500; transition: color .2s; }
.main-nav a:hover { color: var(--amber-deep); }
.nav-cta { background: var(--amber); color: #1a1205 !important; padding: 9px 18px; border-radius: var(--radius); font-family: "Oswald"; text-transform: uppercase; letter-spacing: .04em; }
.nav-cta:hover { background: var(--amber-deep); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--ink); display: block; }

/* ---------- Hero ---------- */
.hero {
  background:
    linear-gradient(180deg, rgba(14,15,18,.86), rgba(14,15,18,.96)),
    repeating-linear-gradient(45deg, #1a1d22 0 14px, #16181d 14px 28px);
  color: var(--white);
  padding: 84px 0 72px;
  border-bottom: 4px solid var(--amber);
}
.hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 56px; align-items: center; }
.eyebrow { color: var(--amber); text-transform: uppercase; letter-spacing: .28em; font-size: 12px; font-weight: 600; margin-bottom: 18px; }
.hero h1 { font-size: clamp(40px, 5.4vw, 68px); font-weight: 700; }
.hero h1 span { color: var(--amber); }

/* Rotador de tipos de equipamiento */
.hero-rotator {
  margin-top: 16px; min-height: 1.4em;
  font-family: "Oswald", sans-serif; font-weight: 600;
  text-transform: uppercase; letter-spacing: .06em;
  font-size: clamp(20px, 2.6vw, 30px);
}
.rotator-text {
  display: inline-block; color: var(--amber);
  border-left: 4px solid var(--amber); padding-left: 14px;
  transition: opacity .35s ease, transform .35s ease;
}
.rotator-text.is-out { opacity: 0; transform: translateY(8px); }
@media (prefers-reduced-motion: reduce) {
  .rotator-text { transition: none; }
}
.hero-lead { color: #c5cad2; font-size: 18px; max-width: 540px; margin: 22px 0 32px; }
.hero-lead strong { color: var(--white); }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats { list-style: none; display: flex; gap: 36px; margin-top: 44px; border-top: var(--hairline); padding-top: 24px; }
.hero-stats strong { display: block; font-family: "Oswald"; font-size: 20px; color: var(--amber); }
.hero-stats span { font-size: 13px; color: var(--muted-light); }

.hero-panel { background: var(--steel); border: var(--hairline); border-radius: 6px; padding: 22px; }
.hero-panel-tag { font-size: 10px; letter-spacing: .3em; color: var(--muted-light); margin-bottom: 16px; }
.hero-split { display: grid; gap: 14px; }
.hero-split-item { display: grid; gap: 4px; padding: 22px; border-radius: var(--radius); position: relative; overflow: hidden; }
.hero-split-item.is-mineria { background: linear-gradient(135deg, #2a2f37, #1c2026); border-left: 4px solid var(--amber); }
.hero-split-item.is-pintura { background: linear-gradient(135deg, #20242b, #14161b); border-left: 4px solid #6b7280; }
.hs-num { font-family: "Oswald"; font-size: 12px; color: var(--muted-light); letter-spacing: .2em; }
.hs-title { font-family: "Oswald"; font-size: 24px; color: var(--white); }
.hs-desc { font-size: 13px; color: #b3bac4; }

/* ---------- Trust strip ---------- */
.trust-strip { background: var(--amber); color: #1a1205; }
.trust-inner { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 14px; padding: 14px 24px; font-family: "Oswald"; text-transform: uppercase; letter-spacing: .06em; font-size: 14px; }
.trust-inner i { width: 5px; height: 5px; background: #1a1205; border-radius: 50%; display: inline-block; opacity: .5; }

/* ---------- Zones ---------- */
.zone { padding: 90px 0; }
.zone-mineria { background: var(--concrete-2); }
.zone-head { max-width: 680px; margin-bottom: 50px; }
.zone-index { display: inline-block; font-family: "Oswald"; text-transform: uppercase; letter-spacing: .18em; font-size: 13px; color: var(--amber-deep); background: rgba(245,166,35,.12); padding: 6px 14px; border-radius: 100px; margin-bottom: 18px; }
.zone-index--light { color: #cbd0d8; background: rgba(255,255,255,.08); }
.zone-head h2 { font-size: clamp(32px, 4vw, 48px); margin-bottom: 14px; }
.zone-head p { color: var(--muted); font-size: 17px; }
.zone-head .tagline { color: var(--amber-deep); font-style: italic; font-size: 16px; margin-bottom: 10px; }

/* ---------- Cards ---------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.card { background: var(--white); border: 1px solid #e3e0da; border-radius: 6px; overflow: hidden; transition: transform .15s ease, box-shadow .2s ease; }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.card-media {
  height: 200px; display: flex; align-items: flex-end; padding: 16px;
  font-family: "Oswald"; letter-spacing: .14em; color: #fff; font-size: 13px;
  background: #1b1f25;
  position: relative; overflow: hidden;
}
.card-media::before {
  content: ""; position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(to top, rgba(0,0,0,.65) 0%, rgba(0,0,0,.1) 55%, transparent 100%);
}
.card-media img {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
  transition: transform .3s ease;
}
.card-media span { position: relative; z-index: 2; }
.card:hover .card-media img { transform: scale(1.06); }
.card:nth-child(odd) .card-media { background: #1b1f25; }
.card-body { padding: 22px; }
.card-body h3 { font-size: 21px; margin-bottom: 8px; }
.card-body p { color: var(--muted); font-size: 14px; margin-bottom: 14px; }
.tag { font-family: "Oswald"; font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--amber-deep); border: 1px solid var(--amber); padding: 4px 10px; border-radius: 100px; }

/* ---------- Service banner ---------- */
.service-banner {
  margin-top: 28px; display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap;
  background: var(--ink); color: var(--white); border-radius: 6px; padding: 34px 38px;
  border-left: 6px solid var(--amber);
}
.service-banner h3 { font-size: 26px; margin-bottom: 6px; }
.service-banner p { color: #c5cad2; max-width: 560px; }

/* ---------- Quick CTA ---------- */
.quick-cta { display: flex; gap: 14px; flex-wrap: wrap; margin: 40px 0 14px; }
.quick-cta--light .btn-wa { color: #053b1c; }

/* ---------- Forms ---------- */
.form-wrap {
  margin-top: 30px; background: var(--ink); color: var(--white);
  border-radius: 8px; padding: 44px; display: grid; grid-template-columns: .8fr 1.2fr; gap: 40px;
  border-top: 4px solid var(--amber);
}
.form-wrap--light { background: var(--white); color: var(--text); border: 1px solid #e3e0da; border-top: 4px solid var(--ink); }
.form-intro h3 { font-size: 28px; margin-bottom: 12px; }
.form-intro p { color: #c5cad2; }
.form-wrap--light .form-intro p { color: var(--muted); }
.quote-form { display: grid; gap: 16px; }
.quote-form .row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.quote-form label { display: grid; gap: 6px; font-size: 13px; font-weight: 600; letter-spacing: .02em; }
.quote-form input, .quote-form select, .quote-form textarea {
  font-family: inherit; font-size: 15px; padding: 12px 14px; border-radius: var(--radius);
  border: 1px solid var(--steel-line); background: var(--ink-2); color: var(--white); width: 100%;
}
.form-wrap--light .quote-form input,
.form-wrap--light .quote-form select,
.form-wrap--light .quote-form textarea { background: var(--concrete-2); color: var(--text); border-color: #d8d5cf; }
.quote-form input:focus, .quote-form select:focus, .quote-form textarea:focus { outline: 2px solid var(--amber); border-color: var(--amber); }
.quote-form textarea { resize: vertical; }
.form-note { font-size: 12px; color: var(--muted-light); text-align: center; }
.form-note--light { color: var(--muted); }

/* ---------- Zone divider ---------- */
.zone-divider {
  background: var(--amber); text-align: center; padding: 10px;
  font-family: "Oswald"; text-transform: uppercase; letter-spacing: .4em; font-size: 12px; color: #1a1205;
}

/* ---------- Pinturas zone ---------- */
.zone-pinturas { background: var(--ink); color: var(--white); }
.zone-pinturas .zone-head h2 { color: var(--white); }
.zone-pinturas .zone-head p { color: #b3bac4; }
.paint-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.paint-card { background: var(--steel); border: var(--hairline); border-radius: 8px; overflow: hidden; }
.paint-card img { width: 100%; height: 320px; object-fit: cover; }
.paint-card figcaption { padding: 24px; }
.paint-card h3 { font-size: 22px; margin-bottom: 8px; color: var(--white); }
.paint-card p { color: #b3bac4; font-size: 14px; }
.paint-features { list-style: none; display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; margin-top: 30px; }
.paint-features li { border: var(--hairline); border-radius: 6px; padding: 22px; }
.paint-features strong { display: block; font-family: "Oswald"; font-size: 18px; color: var(--amber); margin-bottom: 4px; }
.paint-features span { font-size: 13px; color: #b3bac4; }

/* ---------- About ---------- */
.about { background: var(--concrete-2); padding: 90px 0; }
.about-inner { display: grid; grid-template-columns: 1.2fr .8fr; gap: 56px; align-items: center; }
.about h2 { font-size: clamp(28px, 3.4vw, 40px); margin: 14px 0 18px; }
.about p { color: var(--muted); font-size: 17px; margin-bottom: 14px; }
.about-points { display: grid; gap: 14px; }
.about-points div { background: var(--white); border: 1px solid #e3e0da; border-left: 4px solid var(--amber); border-radius: 4px; padding: 20px; }
.about-points strong { display: block; font-family: "Oswald"; font-size: 18px; margin-bottom: 4px; }
.about-points span { color: var(--muted); font-size: 14px; }

/* ---------- Footer ---------- */
.site-footer { background: var(--ink); color: #c5cad2; padding: 60px 0 28px; border-top: 4px solid var(--amber); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; }
.footer-brand .brand-mark { color: var(--white); font-size: 30px; letter-spacing: .18em; }
.footer-brand p { margin-top: 12px; max-width: 320px; font-size: 14px; }
.footer-col h4 { color: var(--white); font-size: 16px; margin-bottom: 14px; text-transform: uppercase; letter-spacing: .08em; }
.footer-col a { display: block; color: #c5cad2; font-size: 14px; margin-bottom: 10px; transition: color .2s; }
.footer-col a:hover { color: var(--amber); }
.footer-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; margin-top: 40px; padding-top: 20px; border-top: var(--hairline); font-size: 12px; color: var(--muted-light); }

/* ---------- WhatsApp float ---------- */
.wa-float {
  position: fixed; right: 22px; bottom: 22px; z-index: 60;
  width: 58px; height: 58px; border-radius: 50%; background: var(--wa); color: #fff;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 24px rgba(0,0,0,.3);
  transition: transform .15s ease;
  animation: wa-glow 2.4s ease-in-out infinite;
}
.wa-float:hover { transform: scale(1.08); animation-play-state: paused; }

/* Resplandor pulsante sutil */
@keyframes wa-glow {
  0%, 100% { box-shadow: 0 8px 24px rgba(0,0,0,.3), 0 0 0 0 rgba(37,211,102,.45); }
  50%      { box-shadow: 0 8px 24px rgba(0,0,0,.3), 0 0 18px 6px rgba(37,211,102,.55); }
}
@media (prefers-reduced-motion: reduce) {
  .wa-float { animation: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .hero-grid, .about-inner { grid-template-columns: 1fr; gap: 36px; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .form-wrap { grid-template-columns: 1fr; padding: 30px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .main-nav { display: none; }
  .main-nav.open {
    display: flex; flex-direction: column; position: absolute; top: 68px; left: 0; right: 0;
    background: #ffffff; padding: 18px 24px; gap: 16px; border-bottom: 1px solid #e3e0da;
    box-shadow: 0 4px 12px rgba(0,0,0,.08);
  }
  .nav-toggle { display: flex; }
  .cards, .paint-grid, .paint-features { grid-template-columns: 1fr; }
  .quote-form .row { grid-template-columns: 1fr; }
  .hero-stats { gap: 20px; flex-wrap: wrap; }
  .footer-grid { grid-template-columns: 1fr; }
  .service-banner { padding: 26px; }
  .zone { padding: 60px 0; }
}