/* =========================================================================
   COMPRESORES COPELAND MÉXICO — Hoja de estilos global
   Diseño B2B industrial · Responsive · Accesible (WCAG 2.1 AA)
   Paleta: azul industrial + naranja CTA + grises técnicos
   ========================================================================= */

:root {
  /* Colores de marca */
  --c-primary:        #0b2545;   /* Azul industrial */
  --c-primary-dark:   #061a33;
  --c-primary-light:  #1d4e89;
  --c-accent:         #f0a020;   /* Naranja CTA */
  --c-accent-dark:    #d98c10;
  --c-success:        #1e824c;
  --c-danger:         #c0392b;
  --c-ink:            #1c2733;   /* Texto principal */
  --c-muted:          #5b6b7b;   /* Texto secundario */
  --c-line:           #d9e2ec;   /* Bordes */
  --c-bg:             #ffffff;
  --c-bg-soft:        #f4f7fa;
  --c-bg-dark:        #07182b;

  /* Tipografía */
  --font-sans: "Segoe UI", Roboto, "Helvetica Neue", Arial, system-ui, sans-serif;
  --fs-base: 1.0625rem;          /* 17px */
  --lh-base: 1.7;

  /* Espaciado y formas */
  --radius: 8px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 3px rgba(10,34,51,.10);
  --shadow-md: 0 6px 20px rgba(10,34,51,.12);
  --shadow-lg: 0 14px 40px rgba(10,34,51,.18);
  --container: 1200px;
  --header-h: 76px;
  --transition: .2s ease;
}

/* ---------- Reset razonable ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-base);
  color: var(--c-ink);
  background: var(--c-bg);
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--c-primary-light); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--c-accent); text-decoration: underline; }
h1, h2, h3, h4 { color: var(--c-primary); line-height: 1.25; font-weight: 700; }
h1 { font-size: clamp(1.9rem, 4vw, 2.8rem); margin: 0 0 .6em; }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); margin: 1.8em 0 .6em; }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); margin: 1.5em 0 .5em; }
h4 { font-size: 1.1rem; margin: 1.2em 0 .4em; color: var(--c-primary-light); }
p  { margin: 0 0 1.1em; }
ul, ol { margin: 0 0 1.1em; padding-left: 1.3em; }
li { margin: .3em 0; }

/* ---------- Accesibilidad ---------- */
:focus-visible {
  outline: 3px solid var(--c-accent);
  outline-offset: 2px;
  border-radius: 3px;
}
.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 1000;
  background: var(--c-accent); color: #fff; padding: .8em 1.2em;
  font-weight: 700; border-radius: 0 0 var(--radius) 0;
}
.skip-link:focus { left: 0; }
.visually-hidden {
  position: absolute !important; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ---------- Layout ---------- */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 20px; }
.section { padding: 64px 0; }
.section--soft { background: var(--c-bg-soft); }
.section--dark { background: var(--c-bg-dark); color: #e7eef5; }
.section--dark h2, .section--dark h3 { color: #fff; }
.section__head { max-width: 760px; margin: 0 auto 40px; text-align: center; }
.section__head p { color: var(--c-muted); font-size: 1.1rem; }
.section--dark .section__head p { color: #b9c9d8; }
.eyebrow {
  display: inline-block; text-transform: uppercase; letter-spacing: .12em;
  font-size: .78rem; font-weight: 700; color: var(--c-accent); margin-bottom: .6em;
}

/* ---------- Header / Navegación ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 900;
  background: rgba(255,255,255,.97); backdrop-filter: saturate(160%) blur(8px);
  border-bottom: 1px solid var(--c-line); box-shadow: var(--shadow-sm);
  height: var(--header-h);
  transition: box-shadow var(--transition);
}
.site-header.is-scrolled { box-shadow: var(--shadow-md); }
.nav { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 800; color: var(--c-primary); font-size: 1.15rem; }
.brand:hover { text-decoration: none; }
.brand__mark {
  width: 42px; height: 42px; border-radius: 9px; flex: 0 0 auto;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-light));
  color: #fff; display: grid; place-items: center; font-weight: 800; font-size: 1.1rem;
}
.brand__name small { display: block; font-size: .68rem; font-weight: 600; color: var(--c-muted); letter-spacing: .02em; }

.nav__menu { display: flex; align-items: center; gap: 4px; list-style: none; margin: 0; padding: 0; }
.nav__menu a {
  display: block; padding: 10px 14px; color: var(--c-ink); font-weight: 600; border-radius: var(--radius);
}
.nav__menu a:hover, .nav__menu a[aria-current="page"] { background: var(--c-bg-soft); color: var(--c-primary); text-decoration: none; }
.nav__cta { margin-left: 10px; }

.nav__toggle {
  display: none; width: 46px; height: 46px; border: 1px solid var(--c-line);
  background: #fff; border-radius: var(--radius); cursor: pointer; padding: 0;
}
.nav__toggle span, .nav__toggle span::before, .nav__toggle span::after {
  content: ""; display: block; width: 22px; height: 2px; background: var(--c-primary);
  margin: 0 auto; position: relative; transition: var(--transition);
}
.nav__toggle span::before { position: absolute; top: -7px; }
.nav__toggle span::after  { position: absolute; top: 7px; }
.nav__toggle[aria-expanded="true"] span { background: transparent; }
.nav__toggle[aria-expanded="true"] span::before { top: 0; transform: rotate(45deg); }
.nav__toggle[aria-expanded="true"] span::after  { top: 0; transform: rotate(-45deg); }

/* ---------- Botones ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 22px; font-weight: 700; font-size: .98rem; border-radius: var(--radius);
  border: 2px solid transparent; cursor: pointer; transition: var(--transition);
  text-align: center; line-height: 1.2;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn--accent { background: var(--c-accent); color: #fff; }
.btn--accent:hover { background: var(--c-accent-dark); color: #fff; box-shadow: var(--shadow-md); }
.btn--primary { background: var(--c-primary); color: #fff; }
.btn--primary:hover { background: var(--c-primary-dark); color: #fff; box-shadow: var(--shadow-md); }
.btn--ghost { background: transparent; color: var(--c-primary); border-color: var(--c-primary); }
.btn--ghost:hover { background: var(--c-primary); color: #fff; }
.btn--light { background: #fff; color: var(--c-primary); }
.btn--light:hover { background: var(--c-bg-soft); color: var(--c-primary); }
.btn--block { width: 100%; }
.btn--sm { padding: 9px 16px; font-size: .9rem; }

/* ---------- Hero ---------- */
.hero {
  margin-top: var(--header-h);
  background: linear-gradient(135deg, var(--c-primary-dark) 0%, var(--c-primary) 55%, var(--c-primary-light) 100%);
  color: #fff; padding: 76px 0; position: relative; overflow: hidden;
}
.hero::after {
  content: ""; position: absolute; right: -120px; top: -120px; width: 460px; height: 460px;
  background: radial-gradient(circle, rgba(230,126,34,.28), transparent 70%); pointer-events: none;
}
.hero h1 { color: #fff; max-width: 22ch; }
.hero p { font-size: 1.18rem; color: #d9e6f2; max-width: 56ch; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 26px; }
.hero__stats { display: flex; flex-wrap: wrap; gap: 36px; margin-top: 44px; }
.hero__stats div strong { display: block; font-size: 2rem; color: var(--c-accent); }
.hero__stats div span { color: #c4d6e6; font-size: .92rem; }

/* ---------- Grids / Tarjetas ---------- */
.grid { display: grid; gap: 24px; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-lg);
  padding: 28px; box-shadow: var(--shadow-sm); transition: var(--transition); height: 100%;
}
.card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.card__icon {
  width: 54px; height: 54px; border-radius: 12px; display: grid; place-items: center;
  background: var(--c-bg-soft); color: var(--c-primary); font-size: 1.5rem; margin-bottom: 16px;
}
.card h3 { margin-top: 0; }
.card p { color: var(--c-muted); }
.card__link { font-weight: 700; }

.product-card { display: flex; flex-direction: column; }
.product-card .tag {
  align-self: flex-start; font-size: .72rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: .06em; color: var(--c-primary-light); background: var(--c-bg-soft);
  padding: 4px 10px; border-radius: 999px; margin-bottom: 12px;
}
.product-card ul { color: var(--c-muted); font-size: .95rem; }
.product-card .btn { margin-top: auto; }

/* ---------- Breadcrumbs ---------- */
.breadcrumbs { background: var(--c-bg-soft); border-bottom: 1px solid var(--c-line); margin-top: var(--header-h); }
.breadcrumbs ol { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; margin: 0; padding: 14px 0; font-size: .9rem; }
.breadcrumbs li::after { content: "/"; margin-left: 6px; color: var(--c-muted); }
.breadcrumbs li:last-child::after { content: ""; }
.breadcrumbs a { color: var(--c-muted); }
.breadcrumbs li[aria-current="page"] { color: var(--c-primary); font-weight: 600; }

/* ---------- Tablas técnicas ---------- */
.table-wrap { overflow-x: auto; margin: 1.5em 0; border-radius: var(--radius); border: 1px solid var(--c-line); }
table.tech { width: 100%; border-collapse: collapse; font-size: .96rem; min-width: 520px; }
table.tech caption { text-align: left; font-weight: 700; color: var(--c-primary); padding: 12px 14px; background: var(--c-bg-soft); }
table.tech th, table.tech td { padding: 12px 14px; border-bottom: 1px solid var(--c-line); text-align: left; vertical-align: top; }
table.tech thead th { background: var(--c-primary); color: #fff; font-weight: 700; }
table.tech tbody tr:nth-child(even) { background: var(--c-bg-soft); }
table.tech tbody tr:hover { background: #eaf2f8; }

/* ---------- Artículo / Blog ---------- */
.article { max-width: 820px; margin: 0 auto; }
.article__meta { color: var(--c-muted); font-size: .9rem; margin-bottom: 8px; }
.article__lead { font-size: 1.18rem; color: var(--c-muted); }
.article figure { margin: 1.5em 0; }
.article blockquote {
  border-left: 4px solid var(--c-accent); background: var(--c-bg-soft);
  margin: 1.5em 0; padding: 16px 20px; border-radius: 0 var(--radius) var(--radius) 0; color: var(--c-ink);
}
.callout {
  background: #eef6fb; border: 1px solid #cfe4f1; border-left: 4px solid var(--c-primary-light);
  border-radius: var(--radius); padding: 18px 22px; margin: 1.6em 0;
}
.callout--warn { background: #fef4ec; border-color: #f6d9bf; border-left-color: var(--c-accent); }
.callout strong { color: var(--c-primary); }

.cta-box {
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-light));
  color: #fff; border-radius: var(--radius-lg); padding: 34px; margin: 2.4em 0; text-align: center;
}
.cta-box h3 { color: #fff; margin-top: 0; }
.cta-box p { color: #d9e6f2; }
.cta-box .btn { margin: 6px; }

.related { border-top: 1px solid var(--c-line); margin-top: 3em; padding-top: 1.5em; }
.related h2 { margin-top: 0; }

/* Tarjeta de entrada en índice de blog */
.post-card { display: flex; flex-direction: column; }
.post-card .tag { margin-bottom: 10px; }
.post-card h3 { margin: 0 0 10px; font-size: 1.2rem; }
.post-card h3 a { color: var(--c-primary); }
.post-card p { color: var(--c-muted); font-size: .96rem; }
.post-card .read { margin-top: auto; font-weight: 700; }

/* ---------- FAQ ---------- */
.faq { max-width: 820px; margin: 2em auto 0; }
.faq details {
  border: 1px solid var(--c-line); border-radius: var(--radius); margin-bottom: 12px; background: #fff; overflow: hidden;
}
.faq summary {
  cursor: pointer; padding: 16px 20px; font-weight: 700; color: var(--c-primary);
  list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 12px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 1.4rem; color: var(--c-accent); transition: var(--transition); }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details > div { padding: 0 20px 18px; color: var(--c-muted); }

/* ---------- Formularios ---------- */
.form { display: grid; gap: 16px; }
.form .field { display: flex; flex-direction: column; gap: 6px; }
.form label { font-weight: 600; font-size: .95rem; }
.form label .req { color: var(--c-danger); }
.form input, .form select, .form textarea {
  font: inherit; padding: 12px 14px; border: 1px solid var(--c-line); border-radius: var(--radius);
  background: #fff; color: var(--c-ink); transition: var(--transition);
}
.form input:focus, .form select:focus, .form textarea:focus { border-color: var(--c-primary-light); outline: none; box-shadow: 0 0 0 3px rgba(27,108,168,.18); }
.form textarea { min-height: 130px; resize: vertical; }
.form .error-msg { color: var(--c-danger); font-size: .85rem; min-height: 1em; }
.form input[aria-invalid="true"], .form textarea[aria-invalid="true"], .form select[aria-invalid="true"] { border-color: var(--c-danger); }
.form__note { font-size: .85rem; color: var(--c-muted); }
.form-status { padding: 14px 18px; border-radius: var(--radius); font-weight: 600; }
.form-status--ok { background: #e6f4ec; color: var(--c-success); border: 1px solid #bfe3cd; }

.contact-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 40px; align-items: start; }
.info-list { list-style: none; padding: 0; margin: 0; }
.info-list li { display: flex; gap: 12px; padding: 14px 0; border-bottom: 1px solid var(--c-line); }
.info-list .ico { color: var(--c-accent); font-weight: 800; }

/* ---------- Bloque CTA ancho ---------- */
.cta-strip { background: var(--c-accent); color: #fff; text-align: center; padding: 50px 0; }
.cta-strip h2 { color: #fff; margin-top: 0; }
.cta-strip p { color: #fff5ec; max-width: 60ch; margin: 0 auto 22px; }

/* ---------- Footer ---------- */
.site-footer { background: var(--c-bg-dark); color: #b9c9d8; padding: 56px 0 22px; }
.site-footer h4 { color: #fff; font-size: 1rem; margin: 0 0 14px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 32px; }
.site-footer a { color: #b9c9d8; }
.site-footer a:hover { color: var(--c-accent); }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin: 8px 0; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); margin-top: 36px; padding-top: 18px; font-size: .85rem; display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; }

/* Botón flotante WhatsApp/Especialista */
.float-cta {
  position: fixed; right: 18px; bottom: 18px; z-index: 850;
  background: var(--c-success); color: #fff; border-radius: 999px; padding: 14px 20px;
  font-weight: 700; box-shadow: var(--shadow-lg); display: inline-flex; gap: 8px; align-items: center;
}
.float-cta:hover { color: #fff; transform: translateY(-2px); }

/* ---------- Utilidades ---------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; } .mb-0 { margin-bottom: 0; }
.lead { font-size: 1.15rem; color: var(--c-muted); }
.divider { height: 1px; background: var(--c-line); border: 0; margin: 2.4em 0; }

/* ---------- Responsive: Tablet ---------- */
@media (max-width: 980px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

/* ---------- Responsive: Mobile ---------- */
@media (max-width: 760px) {
  .nav__toggle { display: block; }
  .nav__menu {
    position: fixed; inset: var(--header-h) 0 auto 0; flex-direction: column; align-items: stretch;
    background: #fff; border-bottom: 1px solid var(--c-line); padding: 14px; gap: 4px;
    box-shadow: var(--shadow-md); transform: translateY(-130%); transition: transform .28s ease;
    max-height: calc(100vh - var(--header-h)); overflow-y: auto;
  }
  .nav__menu.is-open { transform: translateY(0); }
  .nav__menu a { padding: 14px; border-radius: var(--radius); }
  .nav__cta { margin: 8px 0 0; }
  .nav__cta .btn { width: 100%; }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero { padding: 54px 0; }
  .hero__stats { gap: 24px; }
  .section { padding: 48px 0; }
  .float-cta { right: 12px; bottom: 12px; padding: 12px 16px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}