* { box-sizing: border-box; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  min-height: 100vh; margin: 0; display: flex; flex-direction: column;
  background: var(--color-white); color: var(--color-text);
  font-family: var(--font-family); line-height: 1.65; -webkit-font-smoothing: antialiased;
}
body.nav-open { overflow: hidden; }
button, input, select { font: inherit; }
button, a { touch-action: manipulation; }
a { color: var(--brand-orange-dark); font-weight: 600; text-underline-offset: .2em; }
img { max-width: 100%; }
h1, h2, h3, p { overflow-wrap: break-word; }
:focus-visible { outline: 3px solid var(--color-white); box-shadow: 0 0 0 6px var(--brand-orange-dark); outline-offset: 2px; }
.skip-link {
  position: fixed; top: .75rem; left: .75rem; z-index: 10000; padding: .7rem 1rem;
  border-radius: var(--radius-sm); background: var(--color-white); color: var(--color-ink);
  transform: translateY(-150%); transition: transform var(--transition);
}
.skip-link:focus { transform: translateY(0); }
main { flex: 1; }
.page-shell, .site-header__inner, .site-footer__bottom, .intro__inner, .guides-hero__inner, .guide-hero__inner {
  width: min(var(--page-width), calc(100% - 2 * var(--page-padding))); margin-inline: auto;
}

/* Cabecera */
.site-header {
  position: fixed; inset: 0 0 auto; z-index: 1000; color: var(--color-white);
  background: rgba(18, 12, 2, .46); border-bottom: 1px solid rgba(255, 255, 255, .1);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  transition: background-color 240ms ease, box-shadow 240ms ease;
}
.site-header.is-scrolled, .site-header.menu-open { background: rgba(18, 12, 2, .96); box-shadow: 0 8px 30px rgba(0, 0, 0, .22); }
.site-header__inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 2rem; }
.brand { position: relative; z-index: 2; width: 48px; height: 52px; display: grid; place-items: center; flex: 0 0 auto; border-radius: 50%; }
.brand img { width: 44px; height: 46px; display: block; object-fit: contain; }
.site-nav { display: flex; align-items: center; justify-content: flex-end; gap: .65rem; }
.site-nav a {
  min-height: 44px; padding: .65rem 1.2rem; display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid transparent; border-radius: var(--radius-sm); color: rgba(255, 255, 255, .9);
  font-size: .92rem; font-weight: 600; text-decoration: none;
  transition: color var(--transition), background-color var(--transition), border-color var(--transition);
}
.site-nav a:hover, .site-nav a:focus-visible { color: var(--color-white); background: rgba(255, 255, 255, .12); }
.site-nav a.is-active { color: var(--color-white); background: rgba(255, 255, 255, .3); }
.site-nav .support-link { border-color: rgba(255, 255, 255, .32); }
.nav-toggle { display: none; width: 48px; height: 48px; place-items: center; border: 0; border-radius: 50%; background: transparent; color: var(--color-white); cursor: pointer; }
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  width: 22px; height: 2px; display: block; border-radius: 999px; background: currentColor;
  transition: transform 220ms ease, opacity 220ms ease;
}
.nav-toggle span { position: relative; }
.nav-toggle span::before, .nav-toggle span::after { content: ""; position: absolute; left: 0; }
.nav-toggle span::before { transform: translateY(-7px); }
.nav-toggle span::after { transform: translateY(7px); }
.site-header.menu-open .nav-toggle span { background: transparent; }
.site-header.menu-open .nav-toggle span::before { transform: rotate(45deg); }
.site-header.menu-open .nav-toggle span::after { transform: rotate(-45deg); }

/* Héroes */
.brand-hero {
  position: relative; isolation: isolate; overflow: hidden; color: var(--color-white); background-color: #839f22;
  background-image: url("/assets/brand/hero-poligonal.svg"); background-size: cover; background-position: center;
}
.brand-hero::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(110deg, rgba(14, 43, 15, .64), rgba(72, 53, 4, .18) 54%, rgba(91, 39, 2, .2));
}
.eyebrow { margin: 0 0 .8rem; color: inherit; font-size: .78rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; }
.lead { margin: 1.2rem 0 0; color: inherit; font-size: clamp(1rem, 1.7vw, 1.18rem); line-height: 1.55; }
.intro { min-height: 500px; display: flex; align-items: center; padding: 9rem 0 4.5rem; }
.intro__inner { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(280px, .65fr); gap: clamp(2rem, 6vw, 5rem); align-items: end; }
.intro__inner--single { grid-template-columns: 1fr; }
.intro h1, .guides-hero h1, .guide-hero h1 { margin: 0; color: var(--color-white); font-weight: 650; letter-spacing: -.045em; }
.intro h1, .guides-hero h1 { max-width: 900px; font-size: clamp(2.5rem, 6vw, 4.8rem); line-height: .98; }
.intro-copy .lead { max-width: 760px; }
.intro-note, .guide-hero-note {
  padding: 1.5rem 1.6rem; display: grid; gap: .45rem; border-top: 5px solid var(--brand-yellow);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg); background: rgba(255, 255, 255, .92);
  color: var(--color-text); box-shadow: var(--shadow-card);
}
.intro-note strong, .guide-hero-note strong { color: var(--color-ink); font-size: 1.03rem; }
.download-area { padding: clamp(3rem, 7vw, 5rem) 0; }
.download-context { max-width: 900px; margin: 0 0 2rem; color: var(--color-text); font-size: 1rem; }
.download-context strong { color: var(--color-ink); }

/* Flujo de descarga */
.download-shell { overflow: hidden; border: 1px solid var(--color-border); border-radius: calc(var(--radius-lg) + .4rem); background: var(--color-white); box-shadow: var(--shadow-raised); }
.step { display: none; padding: clamp(1.6rem, 5vw, 3.2rem); }
.step.is-active { display: block; }
.section-heading { display: flex; gap: 1.25rem; align-items: flex-start; margin-bottom: 2.2rem; }
.section-heading h2 { margin: 0; color: var(--color-ink); font-size: clamp(1.55rem, 3vw, 2.25rem); line-height: 1.15; letter-spacing: -.03em; }
.section-heading p:not(.step-number) { margin: .4rem 0 0; color: var(--color-text); }
.step-number, .guide-step-number {
  width: 48px; height: 48px; margin: 0; display: grid; place-items: center; flex: 0 0 48px;
  border-radius: var(--radius-md); background: var(--brand-orange); color: var(--color-white); font-weight: 800;
}
.choice-grid, .installer-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.1rem; }
.choice-card, .installer-card {
  width: 100%; min-height: 124px; padding: 1.5rem; display: grid; grid-template-columns: auto 1fr auto;
  gap: 1.1rem; align-items: center; border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  background: var(--color-white); color: var(--color-ink); text-align: left; cursor: pointer;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.choice-card:hover, .installer-card:not(:disabled):hover { transform: translateY(-3px); border-color: var(--brand-orange); box-shadow: var(--shadow-card); }
.choice-icon, .os-mark {
  width: 54px; height: 54px; display: grid; place-items: center; border-radius: 1rem;
  background: #fff0d9; color: var(--brand-orange-dark); font-size: 1.7rem; font-weight: 750;
}
.choice-copy, .installer-card > span:nth-child(2) { display: grid; gap: .2rem; }
.choice-copy strong, .installer-card strong { color: var(--color-ink); font-size: 1.05rem; }
.choice-copy small, .installer-card small { color: var(--color-text); font-size: .9rem; }
.choice-arrow, .download-mark { color: var(--brand-orange-dark); font-size: 1.55rem; }
.back-button { margin: 0 0 1.7rem; padding: .4rem 0; border: 0; background: none; color: var(--brand-orange-dark); font-weight: 700; cursor: pointer; }
fieldset { margin: 0 0 2.4rem; padding: 0; border: 0; }
legend { margin-bottom: 1.2rem; color: var(--color-ink); font-size: 1.2rem; font-weight: 700; }
.form-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.1rem; }
.form-grid.two-columns { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.form-grid label { display: flex; flex-direction: column; gap: .45rem; color: var(--color-ink); font-size: .92rem; font-weight: 600; }
.form-grid label > span { color: var(--color-danger); }
.form-grid label.span-2 { grid-column: span 2; }
.form-grid input, .form-grid select {
  width: 100%; min-height: 52px; padding: .7rem .85rem; border: 1px solid #c9c9c9;
  border-radius: .7rem; background: var(--color-white); color: var(--color-ink); outline: 0;
}
.form-grid input:focus, .form-grid select:focus { border-color: var(--brand-orange-dark); box-shadow: 0 0 0 4px rgba(250, 162, 28, .2); }
.form-grid input[readonly] { background: var(--color-soft); color: var(--color-muted); }
.form-grid small { color: var(--color-text); font-weight: 400; }
.check-line { padding: 1.1rem; display: flex; gap: .8rem; align-items: flex-start; border-radius: var(--radius-md); background: var(--color-soft); }
.check-line input { width: 20px; height: 20px; margin-top: .2rem; flex: 0 0 20px; accent-color: var(--brand-orange-dark); }
.actions { margin-top: 1.8rem; display: flex; justify-content: flex-end; }
.actions.split { justify-content: space-between; gap: 1rem; }
.primary-button, .secondary-button { min-height: 48px; padding: .8rem 1.4rem; border-radius: .7rem; font-weight: 700; cursor: pointer; transition: background-color var(--transition), border-color var(--transition), transform var(--transition); }
.primary-button { border: 1px solid var(--brand-orange); background: var(--brand-orange); color: #2e210c; }
.primary-button:hover { border-color: var(--brand-orange-dark); background: var(--brand-orange-dark); color: var(--color-white); }
.secondary-button { border: 1px solid var(--color-border); background: var(--color-white); color: var(--color-ink); }
button:disabled { cursor: not-allowed; opacity: .5; }
.message { display: none; margin-top: 1.35rem; padding: 1rem 1.1rem; border-radius: var(--radius-md); }
.message.is-visible { display: block; }
.message.error { border: 1px solid #efc3c7; background: var(--color-danger-soft); color: var(--color-danger); }
.message.info { display: block; border: 1px solid #c7e3d1; background: var(--color-success-soft); color: var(--color-success); }
.installer-card:disabled { background: var(--color-soft); }
.windows-mark { font-family: "Segoe UI Symbol", sans-serif; }
.security-note { margin: 1.5rem 0 0; color: var(--color-muted); font-size: .88rem; text-align: center; }

/* Índice de guías */
.guides-hero { min-height: 500px; display: flex; align-items: center; padding: 9rem 0 4.5rem; }
.guides-hero__inner { max-width: var(--page-width); }
.guides-hero h1 { max-width: 820px; }
.guides-hero .lead { max-width: 680px; }
.guides-area { padding: clamp(3rem, 7vw, 5rem) 0; }
.guides-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.4rem; }
.guide-card {
  min-height: 230px; padding: 1.8rem; display: grid; grid-template-columns: 64px 1fr; grid-template-rows: 1fr auto;
  gap: 1.1rem 1.5rem; border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  background: var(--color-white); color: var(--color-ink); text-decoration: none; box-shadow: var(--shadow-card);
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.guide-card:hover { transform: translateY(-3px); border-color: rgba(250, 162, 28, .65); box-shadow: var(--shadow-raised); }
.guide-card-icon { width: 62px; height: 62px; display: grid; place-items: center; border-radius: .9rem; background: #fff0d9; font-size: 1.75rem; }
.guide-card-copy { display: grid; align-content: start; gap: .55rem; }
.guide-card-copy strong { color: var(--brand-orange-dark); font-size: 1.25rem; font-weight: 500; line-height: 1.25; }
.guide-card-copy span { color: var(--color-text); font-size: .93rem; font-weight: 400; }
.guide-card-action { grid-column: 1 / -1; display: inline-flex; align-items: center; gap: .65rem; align-self: end; color: var(--brand-orange-dark); font-size: .9rem; }
.guide-card-arrow { width: 32px; height: 32px; display: grid; place-items: center; border-radius: .55rem; background: #fff0d9; font-size: 1.15rem; }

/* Detalle de guía */
.guide-hero { min-height: 430px; padding: 7.5rem 0 3.5rem; display: flex; align-items: center; }
.guide-hero__inner { display: grid; gap: 1.6rem; }
.breadcrumb { color: rgba(255, 255, 255, .78); font-size: .86rem; }
.breadcrumb a { color: var(--color-white); }
.guide-hero__grid { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(260px, .6fr); gap: clamp(2rem, 5vw, 4rem); align-items: end; }
.guide-hero__grid--single { grid-template-columns: 1fr; }
.guide-hero h1 { max-width: 820px; font-size: clamp(2.2rem, 5vw, 4rem); line-height: 1.02; }
.guide-content { padding-block: clamp(2.6rem, 6vw, 4.5rem); }
.guide-context { max-width: 940px; margin: 0 0 2rem; color: var(--color-text); font-size: 1rem; }
.guide-context strong { color: var(--brand-orange-dark); }
.guide-flow { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: .65rem; margin-bottom: 2.2rem; }
.guide-flow-item {
  position: relative; min-height: 104px; padding: .8rem; display: grid; place-items: center; align-content: center;
  gap: .35rem; border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-white);
  color: var(--color-ink); font-size: .78rem; font-weight: 700; text-align: center;
}
.guide-flow-item::after { content: ""; position: absolute; right: -.7rem; z-index: 1; width: .7rem; height: 2px; background: var(--brand-orange); }
.guide-flow-item:last-child { border-color: #b8d99c; background: #f1f9e9; }
.guide-flow-item:last-child::after { display: none; }
.guide-emoji { font-size: 1.65rem; }
.guide-manual { overflow: hidden; margin-bottom: 2rem; border: 1px solid var(--color-border); border-radius: calc(var(--radius-lg) + .25rem); background: var(--color-white); box-shadow: var(--shadow-card); }
.guide-step { padding: 2rem; display: grid; grid-template-columns: 52px minmax(0, 1fr) 180px; gap: 1.4rem; align-items: center; border-bottom: 1px solid var(--color-border); }
.guide-step:last-child { border-bottom: 0; }
.guide-step h2 { margin: 0 0 .45rem; color: var(--color-ink); font-size: 1.25rem; line-height: 1.3; }
.guide-step p { margin: 0 0 .55rem; }
.guide-step ul { margin: 0; padding-left: 1.2rem; color: var(--color-text); }
.guide-illustration { min-height: 112px; padding: 1rem; display: grid; place-items: center; align-content: center; gap: .35rem; border-radius: var(--radius-md); background: var(--color-soft); color: var(--color-text); font-size: .76rem; font-weight: 600; text-align: center; }
.guide-illustration span:first-child { font-size: 2.1rem; }
.guide-options { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .75rem; margin-top: .8rem; }
.guide-option { padding: .75rem .85rem; border-left: 4px solid var(--brand-orange); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; background: #fff7eb; }
.guide-option strong { display: block; color: var(--color-ink); }
.guide-loop { margin-top: .75rem; padding: .8rem .9rem; border-radius: var(--radius-sm); background: var(--color-soft); }
.guide-key { margin: 0 0 1rem; padding: 1.1rem 1.3rem; display: flex; gap: .9rem; align-items: flex-start; border-left: 5px solid var(--brand-yellow); border-radius: 0 var(--radius-md) var(--radius-md) 0; background: #fff9dc; }
.guide-key > span:first-child { font-size: 1.4rem; }
.guide-back { display: inline-flex; margin-top: 1.2rem; }

/* Pie */
.site-footer { margin-top: auto; background: var(--color-white); }
.site-footer__main {
  width: 100%; padding: 3.2rem max(var(--page-padding), calc((100% - var(--page-width)) / 2));
  display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(320px, .75fr); gap: clamp(2rem, 8vw, 7rem);
  background: var(--color-footer); color: rgba(255, 255, 255, .9);
}
.site-footer__brand img { width: 48px; height: 50px; margin-bottom: 1rem; object-fit: contain; }
.site-footer__brand p { max-width: 610px; margin: 0; font-size: .86rem; }
.site-footer__links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2rem; }
.site-footer__links > div { display: grid; align-content: start; gap: .65rem; }
.site-footer__links strong { color: var(--color-white); font-size: .78rem; letter-spacing: .08em; text-transform: uppercase; }
.site-footer__links a { color: rgba(255, 255, 255, .82); font-size: .86rem; font-weight: 500; text-decoration: none; }
.site-footer__links a:hover { color: var(--color-white); text-decoration: underline; }
.site-footer__bottom { padding-block: 1rem; display: flex; justify-content: space-between; align-items: center; gap: 1.5rem; }
.site-footer__legal { display: flex; flex-wrap: wrap; gap: .75rem 1.8rem; color: var(--color-muted); font-size: .76rem; }
.site-footer__legal a { color: var(--color-text); font-weight: 500; text-decoration: none; }
.site-footer__social { display: flex; gap: .85rem; }
.site-footer__social a { width: 38px; height: 38px; display: grid; place-items: center; border-radius: 50%; background: var(--color-footer); transition: transform var(--transition), background-color var(--transition); }
.site-footer__social a:hover { transform: translateY(-2px); background: var(--brand-orange-dark); }
.site-footer__social img { width: 18px; height: 18px; }

@media (max-width: 900px) {
  .intro__inner, .guide-hero__grid { grid-template-columns: 1fr; align-items: start; }
  .intro-note, .guide-hero-note { max-width: 620px; }
  .form-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .guide-flow { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .guide-flow-item::after { display: none; }
  .guide-step { grid-template-columns: 52px minmax(0, 1fr); }
  .guide-illustration { grid-column: 2; min-height: 90px; }
  .site-footer__main { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .site-header__inner { min-height: 64px; }
  .brand { width: 44px; height: 48px; }
  .brand img { width: 40px; height: 42px; }
  .nav-toggle { display: grid; position: relative; z-index: 2; }
  .site-nav {
    position: absolute; inset: 0 0 auto; min-height: 100vh; min-height: 100dvh;
    padding: 6rem var(--page-padding) 2rem; display: flex; flex-direction: column;
    align-items: stretch; justify-content: flex-start; gap: .75rem; background: rgba(18, 12, 2, .98);
    opacity: 0; visibility: hidden; transform: translateY(-1rem);
    transition: opacity 220ms ease, transform 220ms ease, visibility 220ms ease;
  }
  .site-header.menu-open .site-nav { opacity: 1; visibility: visible; transform: translateY(0); }
  .site-nav a { width: 100%; min-height: 56px; justify-content: flex-start; padding-inline: 1rem; border-bottom: 1px solid rgba(255, 255, 255, .1); border-radius: 0; font-size: 1.05rem; }
  .site-nav a.is-active { border-radius: var(--radius-sm); }
  .site-nav .support-link { border: 1px solid rgba(255, 255, 255, .3); border-radius: var(--radius-sm); }
  .intro, .guides-hero { min-height: 520px; padding: 7.5rem 0 3.5rem; }
  .guide-hero { min-height: 520px; padding: 6.8rem 0 3.2rem; }
  .choice-grid, .installer-grid, .guides-grid { grid-template-columns: 1fr; }
  .form-grid, .form-grid.two-columns { grid-template-columns: 1fr; }
  .form-grid label.span-2 { grid-column: auto; }
  .guide-card { min-height: 210px; }
  .site-footer__bottom { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 560px) {
  .intro h1, .guides-hero h1 { font-size: 2.55rem; }
  .guide-hero h1 { font-size: 2.3rem; }
  .section-heading { gap: .8rem; }
  .step-number { width: 42px; height: 42px; flex-basis: 42px; }
  .choice-card, .installer-card { padding: 1.1rem; gap: .75rem; }
  .choice-icon, .os-mark { width: 46px; height: 46px; }
  .actions.split { flex-direction: column-reverse; }
  .actions button { width: 100%; }
  .guide-flow { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .guide-step { padding: 1.4rem 1rem; grid-template-columns: 42px minmax(0, 1fr); gap: .75rem; align-items: start; }
  .guide-step-number { width: 42px; height: 42px; flex-basis: 42px; }
  .guide-options { grid-template-columns: 1fr; }
  .guide-illustration { grid-column: 1 / -1; }
  .site-footer__links { grid-template-columns: 1fr 1fr; gap: 1.2rem; }
  .site-footer__legal { flex-direction: column; gap: .5rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}