/* ============================================
   TOKENS
============================================ */
:root {
  /* Color roles — una sola familia (verde-teal) hace el trabajo estructural;
     el cálido queda reservado solo para el momento de conversión */
  --color-bg: #F7F2E9;
  --color-surface: #FFFFFF;
  --color-surface-muted: #ECEBDE;
  --color-ink: #23322C;
  --color-ink-soft: #57645B;
  --color-border: #E1D9C4;

  /* Sección oscura — misma familia teal, más profunda */
  --color-dark-bg: #1C2925;
  --color-dark-surface: #24352F;
  --color-on-dark: #F3EFE4;
  --color-on-dark-soft: #B9C4BB;
  --color-on-dark-border: #37473F;

  /* Primario — verde salvia (confianza / calma / crecimiento). Hace casi todo el trabajo visual. */
  --color-primary: #2F6659;
  --color-primary-soft: #E1EAE4;
  --color-primary-tint: #8FC1AC;

  /* Acento cálido — reservado EXCLUSIVAMENTE para la acción de conversión (CTA) */
  --color-accent: #AD6146;
  --color-accent-hover: #8F4E38;

  --color-focus: #2F6659;
  --color-success: #2F6659;
  --color-error: #A5453A;

  /* Typography */
  --font-display: "Newsreader", Georgia, "Times New Roman", serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --fs-body: clamp(1rem, 0.96rem + 0.18vw, 1.0625rem);
  --fs-small: 0.875rem;
  --fs-eyebrow: 0.8125rem;
  --fs-h1: clamp(2rem, 1.6rem + 2.6vw, 3.6rem);
  --fs-h2: clamp(1.6rem, 1.35rem + 1.4vw, 2.5rem);
  --fs-h3: clamp(1.1rem, 1.02rem + 0.35vw, 1.3rem);
  --fs-lead: clamp(1.02rem, 0.98rem + 0.28vw, 1.2rem);
  --fs-number: clamp(1.6rem, 1.45rem + 0.8vw, 2.1rem);

  --lh-tight: 1.18;
  --lh-heading: 1.28;
  --lh-body: 1.65;

  /* Spacing scale — se re-escala en breakpoints (mobile-first) */
  --space-3xs: 0.25rem;
  --space-2xs: 0.5rem;
  --space-xs: 0.75rem;
  --space-sm: 1rem;
  --space-md: 1.25rem;
  --space-lg: 2rem;
  --space-xl: 2.75rem;
  --space-2xl: 3.5rem;

  /* Layout */
  --container-w: 1180px;
  --container-narrow-w: 740px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 28px;
  --border-w: 1px;

  /* Elevation — sombras suaves, difusas */
  --shadow-sm: 0 1px 3px rgba(35, 50, 44, 0.08);
  --shadow-md: 0 14px 32px rgba(35, 50, 44, 0.12);
  --shadow-lg: 0 28px 64px rgba(35, 50, 44, 0.18);

  /* Motion */
  --ease-standard: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur-fast: 160ms;
  --dur-base: 260ms;
  --dur-slow: 440ms;
}

@media (min-width: 640px) {
  :root {
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;
  }
}

/* ============================================
   RESET
============================================ */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; height: auto; display: block; }
figure { margin: 0; }
a { color: inherit; }
ul, ol { padding: 0; margin: 0; list-style: none; }
button { font: inherit; }
h1, h2, h3, h4 { font-family: var(--font-display); line-height: var(--lh-heading); margin: 0; font-weight: 500; }
p { margin: 0; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  background: var(--color-primary);
  color: var(--color-on-dark);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-sm);
  z-index: 200;
  transition: top var(--dur-base) var(--ease-standard);
}
.skip-link:focus { top: var(--space-sm); }

.demo-ribbon {
  background: var(--color-dark-bg);
  color: var(--color-on-dark);
  font-size: 0.8rem;
  text-align: center;
  padding: 0.55rem var(--space-md);
  line-height: 1.4;
}
.demo-ribbon__dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-primary-tint);
  margin-right: 0.4em;
}

:focus-visible {
  outline: 2.5px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: 4px;
}
.section--dark :focus-visible,
.cta :focus-visible { outline-color: var(--color-primary-tint); }

/* ============================================
   LAYOUT HELPERS
============================================ */
.container {
  width: 100%;
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: var(--space-md);
}
.container--narrow { max-width: var(--container-narrow-w); }

.section { padding-block: var(--space-2xl); }
.section--muted { background: var(--color-surface-muted); }
.section--dark { background: var(--color-dark-bg); color: var(--color-on-dark); }

.eyebrow {
  font-size: var(--fs-eyebrow);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
  display: block;
}
.eyebrow--center { text-align: center; }
.eyebrow--light { color: var(--color-primary-tint); }

.section-title {
  font-size: var(--fs-h2);
  max-width: 30ch;
  color: var(--color-ink);
  text-wrap: balance;
}
.section-title--center { margin-inline: auto; text-align: center; }
.section-title--light { color: var(--color-on-dark); }

/* ============================================
   BUTTONS
============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
  font-family: var(--font-body);
  font-weight: 600;
  text-decoration: none;
  border-radius: 999px;
  border: var(--border-w) solid transparent;
  cursor: pointer;
  transition: transform var(--dur-fast) var(--ease-standard),
              background-color var(--dur-fast) var(--ease-standard),
              box-shadow var(--dur-fast) var(--ease-standard);
  max-width: 100%;
}
.btn .icon { width: 1.1em; height: 1.1em; fill: currentColor; flex-shrink: 0; }

.btn--large { padding: 0.95rem 1.75rem; font-size: 1.0625rem; }
.btn--small { padding: 0.55rem 1.15rem; font-size: 0.9rem; }

.btn--primary {
  background: var(--color-accent);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn--primary:hover { background: var(--color-accent-hover); box-shadow: var(--shadow-md); transform: translateY(-1px); }
.btn--primary:active { transform: translateY(0); }

.btn--ghost {
  background: transparent;
  border-color: var(--color-ink);
  color: var(--color-ink);
  padding: 0.95rem 1.75rem;
  font-size: 1.0625rem;
}
.btn--ghost:hover { background: var(--color-ink); color: var(--color-bg); }

@media (min-width: 640px) { .hero__actions .btn { flex: 0 0 auto; } }

/* ============================================
   HEADER / NAV
============================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(247, 242, 233, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-sm);
}

.brand {
  font-family: var(--font-display);
  font-size: 1.25rem;
  text-decoration: none;
  color: var(--color-ink);
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.brand span {
  font-family: var(--font-body);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
}
.brand--footer { color: var(--color-on-dark); }
.brand--footer span { color: var(--color-primary-tint); }

.menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 0;
}
.menu-toggle__bar {
  width: 18px;
  height: 2px;
  background: var(--color-ink);
  margin-inline: auto;
  transition: transform var(--dur-base) var(--ease-standard), opacity var(--dur-base) var(--ease-standard);
}
.menu-toggle[aria-expanded="true"] .menu-toggle__bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] .menu-toggle__bar:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded="true"] .menu-toggle__bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.site-nav ul {
  display: flex;
  gap: var(--space-lg);
  align-items: center;
}
.site-nav a:not(.btn) {
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--color-ink-soft);
  transition: color var(--dur-fast) var(--ease-standard);
}
.site-nav a:not(.btn):hover { color: var(--color-primary); }

@media (max-width: 860px) {
  .menu-toggle { display: flex; }
  .site-nav {
    position: fixed;
    inset: 65px var(--space-md) auto var(--space-md);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: var(--space-md);
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-md);
    opacity: 0;
    transform: translateY(-8px);
    pointer-events: none;
    transition: opacity var(--dur-base) var(--ease-standard), transform var(--dur-base) var(--ease-standard);
  }
  .site-nav[data-state="open"] {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }
  .site-nav ul { flex-direction: column; align-items: flex-start; gap: var(--space-sm); }
  .site-nav .btn { align-self: stretch; justify-content: center; }
}
@media (min-width: 861px) {
  .menu-toggle { display: none; }
  .site-nav { display: flex; align-items: center; gap: var(--space-lg); }
}

/* ============================================
   HERO — mobile first: menos aire arriba, imagen menos dominante
============================================ */
.hero { padding-block: var(--space-xl) var(--space-lg); }
.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-lg);
  align-items: center;
}
.hero__lead {
  font-size: var(--fs-lead);
  color: var(--color-ink-soft);
  max-width: 52ch;
  margin-block: var(--space-sm) var(--space-md);
}
.hero h1 { font-size: var(--fs-h1); line-height: var(--lh-tight); max-width: 17ch; text-wrap: balance; }
.hero__actions { display: flex; flex-wrap: wrap; gap: var(--space-sm); }
.hero__microcopy { margin-top: var(--space-md); font-size: var(--fs-small); color: var(--color-ink-soft); }

.hero__media img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  aspect-ratio: 4 / 3;
  object-fit: cover;
  object-position: 50% 35%;
  width: 100%;
}

@media (min-width: 640px) {
  .hero { padding-block: var(--space-2xl) var(--space-xl); }
}
@media (min-width: 900px) {
  .hero__grid { grid-template-columns: 1.05fr 0.95fr; }
  .hero__media img { aspect-ratio: 3 / 4; box-shadow: var(--shadow-lg); }
}

/* ============================================
   PARA QUIÉN ES — lista editorial, no tarjetas
============================================ */
.para-quien__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-xl);
  align-items: start;
}
.para-quien__media img {
  border-radius: var(--radius-lg);
  aspect-ratio: 4 / 3;
  object-fit: cover;
  box-shadow: var(--shadow-md);
}

.audience-list { margin-top: var(--space-lg); }
.audience-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-md);
  padding-block: var(--space-lg);
  border-top: 1px solid var(--color-border);
}
.audience-row:last-child { border-bottom: 1px solid var(--color-border); }
.audience-row__num {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--color-primary-tint);
  line-height: 1;
}
.audience-row__tag {
  display: inline-block;
  font-size: var(--fs-eyebrow);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-2xs);
}
.audience-row__body h3 {
  font-size: var(--fs-h3);
  margin-bottom: var(--space-2xs);
  text-wrap: balance;
}
.audience-row__body p { color: var(--color-ink-soft); }

@media (min-width: 860px) {
  .para-quien__grid { grid-template-columns: 1.2fr 0.8fr; }
  .para-quien__media { order: 2; }
  .audience-row__num { font-size: 2rem; }
}

/* ============================================
   PROBLEM
============================================ */
.problem__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-lg);
  align-items: center;
}
.check-list { margin-top: var(--space-lg); display: flex; flex-direction: column; gap: var(--space-sm); }
.check-list li {
  position: relative;
  padding-left: 1.9em;
  color: var(--color-ink-soft);
}
.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 0.55em;
  height: 0.55em;
  border-radius: 50%;
  background: var(--color-primary);
}
.problem__media img { border-radius: var(--radius-lg); aspect-ratio: 3 / 2; object-fit: cover; box-shadow: var(--shadow-md); }

@media (min-width: 640px) {
  .problem__grid { gap: var(--space-xl); }
}
@media (min-width: 860px) {
  .problem__grid { grid-template-columns: 1.1fr 0.9fr; }
}

/* ============================================
   MÉTODO — timeline vertical
============================================ */
.timeline {
  margin-top: var(--space-xl);
  max-width: 640px;
  margin-inline: auto;
  position: relative;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 1.15rem;
  top: 0.4rem;
  bottom: 0.4rem;
  width: 1px;
  background: var(--color-border);
}
.timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-md);
  padding-bottom: var(--space-xl);
}
.timeline__item:last-child { padding-bottom: 0; }
.timeline__marker {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.3rem;
  height: 2.3rem;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--color-surface);
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
  font-family: var(--font-display);
  font-size: 0.95rem;
}
.timeline__body { padding-top: 0.15rem; }
.timeline__body h3 { font-size: var(--fs-h3); margin-bottom: var(--space-2xs); }
.timeline__body p { color: var(--color-ink-soft); max-width: 52ch; }

/* ============================================
   DETAIL / CONFIDENCIALIDAD (dark section)
============================================ */
.detail__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-lg);
  align-items: center;
}
.detail__media img { border-radius: var(--radius-lg); aspect-ratio: 4 / 3; object-fit: cover; }
.detail__text {
  color: var(--color-on-dark-soft);
  margin-top: var(--space-md);
  max-width: 46ch;
}
.detail__text--quote {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--fs-lead);
  color: var(--color-on-dark);
  border-left: 2px solid var(--color-primary-tint);
  padding-left: var(--space-md);
}
.detail__text + .detail__text { margin-top: var(--space-md); }

@media (min-width: 640px) {
  .detail__grid { gap: var(--space-xl); }
}
@media (min-width: 860px) {
  .detail__grid { grid-template-columns: 0.85fr 1.15fr; }
  .detail__media img { aspect-ratio: 3 / 4; }
}

/* ============================================
   MODALIDADES — panel único dividido, no tarjetas
============================================ */
.modality-split {
  margin-top: var(--space-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}
.modality-split__col { padding: var(--space-lg); }
.modality-split__col h3 { font-size: var(--fs-h3); margin-bottom: var(--space-sm); }
.modality-split__col p { color: var(--color-ink-soft); }
.modality-split__divider { height: 1px; background: var(--color-border); margin-inline: var(--space-lg); }

@media (min-width: 720px) {
  .modality-split { grid-template-columns: 1fr auto 1fr; align-items: stretch; }
  .modality-split__divider { width: 1px; height: auto; margin-inline: 0; margin-block: var(--space-lg); }
}
.modality-note {
  margin-top: var(--space-lg);
  text-align: center;
  color: var(--color-ink-soft);
  font-size: var(--fs-small);
  max-width: 56ch;
  margin-inline: auto;
}

/* ============================================
   FAQ
============================================ */
.faq-list { margin-top: var(--space-xl); display: flex; flex-direction: column; gap: var(--space-sm); }
.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-md);
}
.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  padding-block: var(--space-xs);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-sm);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--color-primary);
  flex-shrink: 0;
  transition: transform var(--dur-base) var(--ease-standard);
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p { color: var(--color-ink-soft); padding-bottom: var(--space-sm); max-width: 62ch; }

.emergency-note {
  margin-top: var(--space-xl);
  padding: var(--space-md) var(--space-lg);
  background: var(--color-primary-soft);
  border-radius: var(--radius-md);
  color: var(--color-ink);
  font-size: var(--fs-small);
  text-align: center;
  max-width: 62ch;
  margin-inline: auto;
}

/* ============================================
   CTA FINAL — cierre centrado, sin imagen ni formulario
============================================ */
.cta { background: var(--color-dark-bg); color: var(--color-on-dark); }
.cta__inner {
  max-width: 640px;
  margin-inline: auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.cta__title { margin-bottom: var(--space-md); }
.cta__lead {
  font-size: var(--fs-lead);
  color: var(--color-on-dark-soft);
  max-width: 48ch;
  margin-bottom: var(--space-lg);
}

/* ============================================
   FOOTER
============================================ */
.site-footer {
  background: var(--color-dark-bg);
  color: var(--color-on-dark-soft);
  padding-block: var(--space-xl) var(--space-lg);
  border-top: 1px solid var(--color-on-dark-border);
}
.footer-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-lg);
}
.footer-brand p:last-child { margin-top: var(--space-2xs); }
.footer-matricula { font-size: var(--fs-small); margin-top: var(--space-2xs); }
.footer-contact { display: flex; flex-direction: column; gap: var(--space-2xs); }
.footer-contact a { text-decoration: none; }
.footer-contact a:hover { color: var(--color-primary-tint); }
.footer-legal {
  font-size: 0.8rem;
  border-top: 1px solid var(--color-on-dark-border);
  padding-top: var(--space-md);
  margin-top: var(--space-sm);
}
.footer-credit {
  font-size: 0.8rem;
  margin-top: var(--space-2xs);
}
.footer-credit__brand {
  color: var(--color-primary-tint);
  font-weight: 700;
}

@media (min-width: 720px) {
  .footer-inner {
    grid-template-columns: 1fr 1fr;
    grid-template-areas: "brand contact" "legal legal" "credit credit";
  }
  .footer-brand { grid-area: brand; }
  .footer-contact { grid-area: contact; align-items: flex-end; text-align: right; }
  .footer-legal { grid-area: legal; margin-top: 0; }
  .footer-credit { grid-area: credit; margin-top: -0.5rem; }
}

/* ============================================
   REVEAL ON SCROLL
============================================ */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity var(--dur-slow) var(--ease-standard), transform var(--dur-slow) var(--ease-standard); }
.reveal.is-visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}