/* =============================================================
   1. Tokens
   ============================================================= */
:root {
  --bg:          #F4F0E4;   /* marfil cálido */
  --bg-2:        #EAE3D0;   /* arena */
  --paper:       #FFFFFF;
  --ink:         #16150F;   /* casi negro cálido */
  --ink-soft:    #2B2A22;
  --ink-mute:    #6E6A5C;
  --line:        rgba(22,21,15,0.12);
  --line-soft:   rgba(22,21,15,0.07);

  --green:       #1E3A2B;   /* verde profundo — acento principal */
  --green-2:     #2C4E3A;   /* verde para hover / superficies */
  --green-light: #3E6650;
  --gold:        #A9895F;   /* metálico cálido — acento secundario, uso escaso */

  --dark:        #14140F;   /* neutro oscuro — bandas de contraste */
  --dark-2:      #1C1B14;
  --dark-3:      #26251C;
  --cream-on-dark: #F1ECDC;
  --cream-mute:  rgba(241,236,220,0.66);
  --line-on-dark: rgba(241,236,220,0.14);

  --danger:      #8A2A20;

  --serif: "Cormorant", "EB Garamond", Georgia, serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", "JetBrains Mono", monospace;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-soft: cubic-bezier(0.25, 0.46, 0.45, 0.94);

  --container: 1240px;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --nav-h: 84px;
}

/* =============================================================
   2. Reset & base
   ============================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html {
  -webkit-text-size-adjust: 100%;
  tab-size: 2;
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-h);
  overflow-x: clip;
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  overscroll-behavior-y: none;
}
img, svg, video { display: block; max-width: 100%; }
img { height: auto; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
a { color: inherit; text-decoration: none; }
p { text-wrap: pretty; }
h1, h2, h3, h4 { text-wrap: balance; line-height: 1.05; letter-spacing: -0.01em; font-family: var(--serif); font-weight: 500; }
ul { list-style: none; padding: 0; }
::selection { background: var(--green); color: var(--cream-on-dark); }

:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 3px;
  border-radius: 3px;
}

/* =============================================================
   3. Utilities
   ============================================================= */
.container { max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }
.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: fixed; top: -100px; left: 1rem;
  padding: .7rem 1.1rem; background: var(--green); color: var(--cream-on-dark);
  z-index: 9999; border-radius: 6px; font-weight: 600; transition: top .3s var(--ease-out);
}
.skip-link:focus { top: 1rem; }

.kicker {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.kicker::before {
  content: "";
  width: 22px; height: 1px; background: var(--green);
  display: inline-block;
}
.on-dark .kicker { color: var(--gold); }
.on-dark .kicker::before { background: var(--gold); }

.eyebrow-dot {
  width: 6px; height: 6px; border-radius: 50%; background: var(--green); display: inline-block;
}

.section { padding-block: clamp(4rem, 9vw, 7.5rem); position: relative; }
.section-band { background: var(--dark); color: var(--cream-on-dark); }
.section-band .ink-mute-eq { color: var(--cream-mute); }
.section-sand { background: var(--bg-2); }

.section-head {
  max-width: 46rem;
  margin-bottom: clamp(2.25rem, 5vw, 3.5rem);
}
.section-head h2 { font-size: clamp(1.9rem, 3.4vw, 2.8rem); margin-top: 0.75rem; }
.section-head p { color: var(--ink-mute); font-size: 1.05rem; max-width: 42rem; margin-top: 1rem; }
.section-band .section-head p { color: var(--cream-mute); }

.eq { color: var(--ink-mute); }

/* =============================================================
   4. Typography
   ============================================================= */
em { font-style: italic; color: var(--green); }
.on-dark em { color: var(--gold); }

.lede { font-size: clamp(1.05rem, 1.6vw, 1.25rem); color: var(--ink-mute); max-width: 58ch; }

/* =============================================================
   5. Components
   ============================================================= */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 0.6rem;
  padding: 0.95rem 1.8rem;
  border-radius: 4px;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  transition: transform .35s var(--ease-out), box-shadow .35s var(--ease-out), background .3s var(--ease-out), color .3s var(--ease-out);
  white-space: nowrap;
}
.btn-primary {
  background: var(--green);
  color: var(--cream-on-dark);
  box-shadow: 0 1px 0 rgba(0,0,0,0.1), 0 12px 30px -14px rgba(30,58,43,0.55);
}
.btn-primary:hover { background: var(--green-2); transform: translateY(-2px); box-shadow: 0 18px 36px -16px rgba(30,58,43,0.65); }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}
.btn-ghost:hover { border-color: var(--green); color: var(--green); }
.on-dark .btn-ghost { color: var(--cream-on-dark); border-color: var(--line-on-dark); }
.on-dark .btn-ghost:hover { border-color: var(--gold); color: var(--gold); }
.btn-block { width: 100%; }
.btn[disabled] { opacity: 0.6; pointer-events: none; }

.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 10px;
}

/* Reveal-on-scroll (functional micro-interaction — never gated by reduced-motion) */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .8s var(--ease-out), transform .8s var(--ease-out); }
.reveal.is-visible { opacity: 1; transform: none; }
.reveal[data-split] { opacity: 1; transform: none; }

/* =============================================================
   6. Nav
   ============================================================= */
.nav {
  position: fixed; inset-inline: 0; top: 0; z-index: 100;
  height: var(--nav-h);
  display: flex; align-items: center;
  background: transparent;
  transition: background .4s var(--ease-out), box-shadow .4s var(--ease-out), border-color .4s var(--ease-out);
  border-bottom: 1px solid transparent;
}
.nav.is-solid {
  background: rgba(244,240,228,0.92);
  backdrop-filter: blur(10px) saturate(140%);
  -webkit-backdrop-filter: blur(10px) saturate(140%);
  border-bottom: 1px solid var(--line);
}
@supports not (backdrop-filter: blur(10px)) {
  .nav.is-solid { background: var(--bg); }
}
.nav-inner { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; }
.brand { display: flex; align-items: center; gap: 0.65rem; font-family: var(--serif); font-size: 1.35rem; letter-spacing: 0.02em; color: var(--ink); }
.brand-mark { width: 30px; height: 30px; color: var(--green); flex-shrink: 0; }
.brand-word { font-weight: 600; }
.brand-word small { display: block; font-family: var(--mono); font-size: 0.56rem; letter-spacing: 0.13em; color: var(--ink-mute); text-transform: uppercase; font-style: normal; }

.nav-links { display: none; align-items: center; gap: 2rem; font-size: 0.92rem; }
.nav-links a { position: relative; padding-block: 0.3rem; color: var(--ink-soft); }
.nav-links a::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: 0; height: 1px; background: var(--green);
  transition: right .35s var(--ease-out);
}
.nav-links a:hover::after { right: 0; }
@media (min-width: 960px) { .nav-links { display: flex; } }

.nav-cta { display: none; }
@media (min-width: 720px) { .nav-cta { display: inline-flex; padding: 0.65rem 1.35rem; font-size: 0.85rem; } }

.nav-burger { display: inline-flex; width: 42px; height: 42px; align-items: center; justify-content: center; }
@media (min-width: 960px) { .nav-burger { display: none; } }
.nav-burger span, .nav-burger::before, .nav-burger::after { content: ""; }
.nav-burger-icon { position: relative; width: 20px; height: 14px; }
.nav-burger-icon span { position: absolute; left: 0; right: 0; height: 1.5px; background: var(--ink); transition: transform .3s var(--ease-out), opacity .3s var(--ease-out); }
.nav-burger-icon span:nth-child(1) { top: 0; }
.nav-burger-icon span:nth-child(2) { top: 6px; }
.nav-burger-icon span:nth-child(3) { top: 12px; }
.nav.is-open .nav-burger-icon span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav.is-open .nav-burger-icon span:nth-child(2) { opacity: 0; }
.nav.is-open .nav-burger-icon span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.nav-mobile {
  position: fixed; inset: var(--nav-h) 0 0 0; background: var(--bg);
  display: flex; flex-direction: column; padding: 2rem var(--gutter);
  gap: 1.5rem; transform: translateY(-8px); opacity: 0; pointer-events: none;
  transition: opacity .3s var(--ease-out), transform .3s var(--ease-out);
  z-index: 90;
}
.nav.is-open .nav-mobile { opacity: 1; transform: none; pointer-events: auto; }
.nav-mobile a { font-family: var(--serif); font-size: 1.6rem; }
@media (min-width: 960px) { .nav-mobile { display: none; } }

/* =============================================================
   7. Hero
   ============================================================= */
.hero {
  position: relative;
  padding-top: calc(var(--nav-h) + clamp(1.5rem, 5vw, 3rem));
  padding-bottom: clamp(3rem, 7vw, 5rem);
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg) 70%, var(--bg-2) 100%);
  overflow: clip;
}
.hero-halo {
  position: absolute; inset: -20% -10% 20% -10%; z-index: 0; pointer-events: none;
  background: radial-gradient(45% 40% at 78% 18%, rgba(30,58,43,0.14), transparent 72%);
  filter: blur(10px);
}
.hero-grid {
  position: relative; z-index: 1;
  display: grid; gap: clamp(2.5rem, 5vw, 4rem);
  align-items: start;
}
@media (min-width: 1024px) { .hero-grid { grid-template-columns: 1.15fr 0.95fr; } }

.hero-copy { max-width: 40rem; }
.hero-copy .kicker { margin-bottom: 1.4rem; }
.hero-title { font-size: clamp(2.35rem, 4.6vw, 3.7rem); max-width: 16ch; }
.hero-sub { margin-top: 1.4rem; font-size: clamp(1.02rem, 1.4vw, 1.18rem); color: var(--ink-mute); max-width: 46ch; }
.hero-actions { margin-top: 2.1rem; display: flex; flex-wrap: wrap; gap: 1rem; align-items: center; }
.hero-note { margin-top: 1.75rem; display: flex; align-items: flex-start; gap: 0.65rem; font-size: 0.85rem; color: var(--ink-mute); max-width: 34rem; }
.hero-note svg { flex-shrink: 0; margin-top: 0.15rem; color: var(--green); width: 16px; height: 16px; }

.hero-figure {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: var(--bg-2);
  display: none;
}
@media (min-width: 1024px) { .hero-figure { display: block; } }
.hero-figure img { width: 100%; height: 100%; object-fit: cover; }
.hero-figure::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(200deg, rgba(20,20,15,0.05) 10%, rgba(20,20,15,0.38) 100%);
}
.hero-figure-cap {
  position: absolute; left: 1.4rem; bottom: 1.3rem; right: 1.4rem; z-index: 1;
  color: var(--cream-on-dark);
  font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.08em; text-transform: uppercase;
  opacity: 0.85;
}

/* =============================================================
   8. Form
   ============================================================= */
.form-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: clamp(1.6rem, 3vw, 2.4rem);
  box-shadow: 0 24px 60px -28px rgba(20,20,15,0.28);
}
.form-card-head h3 { font-size: 1.4rem; }
.form-card-head p { margin-top: 0.5rem; color: var(--ink-mute); font-size: 0.92rem; }

.field-grid { display: grid; gap: 1rem; margin-top: 1.5rem; }
@media (min-width: 540px) { .field-grid.cols-2 { grid-template-columns: 1fr 1fr; } }

.field { display: flex; flex-direction: column; gap: 0.4rem; }
.field label { font-size: 0.8rem; font-weight: 600; color: var(--ink-soft); }
.field-required::after { content: " *"; color: var(--green); }
.field input, .field select, .field textarea {
  width: 100%;
  font: inherit;
  font-size: 0.96rem;
  padding: 0.75rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--bg);
  color: var(--ink);
  transition: border-color .25s var(--ease-out), box-shadow .25s var(--ease-out);
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(30,58,43,0.14);
}
.field textarea { min-height: 108px; resize: vertical; }
.field-tel { display: flex; gap: 0.5rem; }
.field-tel-prefix {
  flex-shrink: 0; display: flex; align-items: center; justify-content: center;
  padding-inline: 0.7rem; border: 1px solid var(--line); border-radius: 7px;
  font-family: var(--mono); font-size: 0.9rem; color: var(--ink-mute); background: var(--bg-2);
}
.field-hint { font-size: 0.76rem; color: var(--ink-mute); }

.form-submit { margin-top: 1.6rem; }
.form-privacy {
  margin-top: 1rem; font-size: 0.78rem; color: var(--ink-mute);
  display: flex; gap: 0.5rem; align-items: flex-start;
}
.form-privacy svg { flex-shrink: 0; margin-top: 0.15rem; width: 14px; height: 14px; color: var(--green); }

.form-success {
  display: none;
  text-align: center;
  padding: 1.5rem 0.5rem 0.5rem;
}
.form-success.is-visible { display: block; }
.form-success svg { width: 46px; height: 46px; color: var(--green); margin-inline: auto; }
.form-success h3 { margin-top: 1rem; font-size: 1.3rem; }
.form-success p { margin-top: 0.6rem; color: var(--ink-mute); font-size: 0.92rem; }
.form-check-path { stroke-dasharray: 40; stroke-dashoffset: 40; animation: drawCheck .55s var(--ease-out) .1s forwards; }
@keyframes drawCheck { to { stroke-dashoffset: 0; } }

.form-body.is-sent { display: none; }

/* =============================================================
   9. Propuesta de valor
   ============================================================= */
.pillars {
  display: grid; gap: 1.4rem; margin-top: 2.5rem;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
}
.pillar {
  padding: 1.6rem 1.5rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--paper);
  transition: transform .4s var(--ease-out), box-shadow .4s var(--ease-out), border-color .4s var(--ease-out);
}
.pillar:hover { transform: translateY(-4px); box-shadow: 0 22px 44px -26px rgba(20,20,15,0.24); border-color: rgba(30,58,43,0.3); }
.pillar-num { font-family: var(--mono); font-size: 0.72rem; color: var(--green); letter-spacing: 0.08em; }
.pillar h3 { font-size: 1.12rem; margin-top: 0.9rem; font-family: var(--sans); font-weight: 650; }
.pillar p { margin-top: 0.55rem; font-size: 0.92rem; color: var(--ink-mute); }

.disclaimer-strip {
  margin-top: 2.6rem;
  padding: 1.1rem 1.4rem;
  border-left: 2px solid var(--green);
  background: var(--bg-2);
  border-radius: 0 8px 8px 0;
  font-size: 0.88rem;
  color: var(--ink-soft);
  max-width: 52rem;
}

/* =============================================================
   10. Áreas de investigación (dark band)
   ============================================================= */
.areas-grid {
  display: grid; gap: 1px;
  background: var(--line-on-dark);
  border: 1px solid var(--line-on-dark);
  border-radius: 10px;
  overflow: hidden;
  margin-top: 2.5rem;
  grid-template-columns: 1fr;
}
@media (min-width: 640px) { .areas-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 960px) { .areas-grid { grid-template-columns: repeat(3, 1fr); } }
.area-item {
  background: var(--dark);
  padding: 1.9rem 1.6rem;
  transition: background .35s var(--ease-out);
  position: relative;
}
.area-item:hover { background: var(--dark-3); }
.area-item svg { width: 26px; height: 26px; color: var(--gold); }
.area-item h3 { font-family: var(--sans); font-weight: 650; font-size: 1rem; margin-top: 1rem; color: var(--cream-on-dark); }
.area-item p { font-size: 0.85rem; color: var(--cream-mute); margin-top: 0.4rem; }

/* =============================================================
   11. Metodología
   ============================================================= */
.steps {
  margin-top: 2.75rem;
  display: grid; gap: 0;
  border-top: 1px solid var(--line);
}
.step {
  display: grid; grid-template-columns: 3.5rem 1fr; gap: 1.3rem;
  padding-block: 1.55rem;
  border-bottom: 1px solid var(--line);
  align-items: baseline;
}
.step-num { font-family: var(--mono); font-size: 0.95rem; color: var(--green); }
.step h3 { font-family: var(--sans); font-weight: 650; font-size: 1.05rem; }
.step p { margin-top: 0.4rem; color: var(--ink-mute); font-size: 0.92rem; max-width: 52ch; }

/* =============================================================
   12. Confianza (dark band)
   ============================================================= */
.trust-grid { margin-top: 2.5rem; display: grid; gap: 2rem; }
@media (min-width: 860px) { .trust-grid { grid-template-columns: 1fr 1fr; } }
.trust-list { display: grid; gap: 1.3rem; }
.trust-list li { display: flex; gap: 0.9rem; align-items: flex-start; }
.trust-list svg { flex-shrink: 0; margin-top: 0.2rem; width: 18px; height: 18px; color: var(--gold); }
.trust-list h3 { font-family: var(--sans); font-weight: 650; font-size: 1rem; color: var(--cream-on-dark); }
.trust-list p { font-size: 0.88rem; color: var(--cream-mute); margin-top: 0.3rem; }
.trust-figure {
  border-radius: 10px; overflow: hidden; aspect-ratio: 4/5; position: relative;
  border: 1px solid var(--line-on-dark);
}
.trust-figure img { width: 100%; height: 100%; object-fit: cover; }

/* =============================================================
   13. Qué puede esperar
   ============================================================= */
.expect-grid {
  margin-top: 2.5rem; display: grid; gap: 1.4rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}
.expect-card {
  padding: 1.8rem 1.7rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--paper);
  transition: transform .4s var(--ease-out), box-shadow .4s var(--ease-out), border-color .4s var(--ease-out);
}
.expect-card:hover { transform: translateY(-4px); box-shadow: 0 22px 44px -26px rgba(20,20,15,0.24); border-color: rgba(30,58,43,0.3); }
.expect-card h3 { font-size: 1.06rem; margin-top: 1rem; font-family: var(--sans); font-weight: 650; }
.expect-card p { margin-top: 0.55rem; font-size: 0.92rem; color: var(--ink-mute); }

/* =============================================================
   14. Sobre nosotros
   ============================================================= */
.about-grid { display: grid; gap: 2.5rem; margin-top: 2rem; align-items: start; }
@media (min-width: 960px) { .about-grid { grid-template-columns: 0.85fr 1.15fr; } }
.about-figure { border-radius: 10px; overflow: hidden; aspect-ratio: 4/5; }
.about-figure img { width: 100%; height: 100%; object-fit: cover; }
.about-copy p + p { margin-top: 1.1rem; }
.about-copy p { color: var(--ink-soft); font-size: 1rem; }

/* =============================================================
   15. FAQ
   ============================================================= */
.faq-list { margin-top: 2.5rem; border-top: 1px solid var(--line); max-width: 54rem; }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item summary {
  list-style: none; cursor: pointer;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding-block: 1.35rem;
  font-family: var(--sans); font-weight: 600; font-size: 1.02rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .faq-plus {
  flex-shrink: 0; width: 22px; height: 22px; position: relative;
}
.faq-item summary .faq-plus::before, .faq-item summary .faq-plus::after {
  content: ""; position: absolute; background: var(--green); transition: transform .3s var(--ease-out);
}
.faq-item summary .faq-plus::before { left: 0; top: 50%; width: 100%; height: 1.5px; transform: translateY(-50%); }
.faq-item summary .faq-plus::after { top: 0; left: 50%; width: 1.5px; height: 100%; transform: translateX(-50%); }
.faq-item[open] summary .faq-plus::after { transform: translateX(-50%) rotate(90deg); opacity: 0; }
.faq-item .faq-a { padding-bottom: 1.4rem; color: var(--ink-mute); font-size: 0.95rem; max-width: 52ch; }

/* =============================================================
   16. CTA final (dark band)
   ============================================================= */
.cta-final { text-align: center; }
.cta-final .section-head { margin-inline: auto; max-width: 40rem; }
.cta-final .hero-actions { justify-content: center; margin-top: 2rem; }

/* =============================================================
   17. Footer
   ============================================================= */
.footer { background: var(--dark-2); color: var(--cream-mute); padding-block: clamp(3rem, 6vw, 4.5rem) 2rem; }
.footer-top { display: grid; gap: 2.5rem; }
@media (min-width: 860px) { .footer-top { grid-template-columns: 1.3fr 1fr 1fr; } }
.footer-brand .brand { color: var(--cream-on-dark); }
.footer-brand p { margin-top: 1rem; font-size: 0.9rem; max-width: 28rem; color: var(--cream-mute); }
.footer-col h4 { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--gold); margin-bottom: 1rem; }
.footer-col ul { display: grid; gap: 0.65rem; }
.footer-col a { font-size: 0.9rem; color: var(--cream-mute); transition: color .25s var(--ease-out); }
.footer-col a:hover { color: var(--cream-on-dark); }
.footer-bottom {
  margin-top: 3rem; padding-top: 1.5rem; border-top: 1px solid var(--line-on-dark);
  display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between; align-items: center;
  font-size: 0.8rem; color: var(--cream-mute);
}

/* =============================================================
   18. Responsive helpers
   ============================================================= */
@media (min-width: 540px)  { .hero-actions { flex-wrap: nowrap; } }
@media (min-width: 720px)  { .container { padding-inline: var(--gutter); } }

/* =============================================================
   19. Reduced-motion — only intrusive effects
   ============================================================= */
@media (prefers-reduced-motion: reduce) {
  .reveal { transition-duration: .01s; }
}