/* =============================================================
   1. Tokens
   ============================================================= */
:root {
  --bg:        #05070c;   /* near-black */
  --bg-2:      #0a0f1c;   /* navy black */
  --bg-3:      #0e1526;
  --ink:       #f2eee4;   /* warm off-white, never pure #fff */
  --ink-soft:  rgba(242,238,228,0.76);
  --mute:      #6f7890;

  --navy:      #14274d;   /* deep navy */
  --navy-2:    #24437f;   /* mid navy */
  --navy-3:    #3d63a8;   /* lighter navy-blue — used for links/hover/focus */
  --cream:     #f5ead2;   /* warm cream — reserved for detail accents */

  --accent:    var(--navy-3);
  --line:      rgba(242,238,228,0.12);

  --gradient-1: var(--navy-3);
  --gradient-2: var(--navy-2);
  --gradient-3: var(--navy);

  --serif: "Instrument Serif", "Georgia", serif;
  --sans:  "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --mono:  "JetBrains Mono", "SFMono-Regular", Consolas, monospace;

  --ease-out:    cubic-bezier(0.16, 1, 0.3, 1);
  --ease-soft:   cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);

  --nav-h: 76px;
}

/* =============================================================
   2. Reset & base
   ============================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html { -webkit-text-size-adjust: 100%; tab-size: 2; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  background: var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  overscroll-behavior-y: none;
}

img, svg, video { display: block; max-width: 100%; }
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-weight: 600; }
em { font-family: var(--serif); font-style: italic; font-weight: 400; color: var(--cream); }
::selection { background: var(--accent); color: var(--bg); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* =============================================================
   3. Utilities
   ============================================================= */
.container { max-width: 1180px; margin-inline: auto; padding-inline: 1.5rem; }
.mono { font-family: var(--mono); }

/* Anchor targets: offset so the sticky nav never covers the section title.
   Needed for native hash navigation (no-JS / direct #links), independent
   of the JS-driven smooth-scroll-with-offset used for in-page clicks. */
#top, #servicios, #proceso, #incluye, #contacto { scroll-margin-top: var(--nav-h); }

.skip-link {
  position: fixed; top: -100px; left: 1rem;
  padding: .6rem 1rem; background: var(--ink); color: var(--bg);
  z-index: 9999; border-radius: 8px; font-weight: 600;
  transition: top .2s var(--ease-out);
}
.skip-link:focus { top: 1rem; }

/* Reveal-on-scroll: content visible by default, JS only enhances */
.reveal { opacity: 1; transform: none; }
.reveal.is-ready {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .7s var(--ease-out), transform .7s var(--ease-out);
}
.reveal.is-ready.is-visible { opacity: 1; transform: none; }

/* =============================================================
   4. Mouse-reactive gradient background (signature effect)
   ============================================================= */
.hero-gradient {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle 620px at var(--mx, 30%) var(--my, 20%), color-mix(in srgb, var(--gradient-1) 55%, transparent) 0%, transparent 60%),
    radial-gradient(circle 720px at calc(var(--mx, 30%) + 25%) calc(var(--my, 20%) + 30%), color-mix(in srgb, var(--gradient-2) 45%, transparent) 0%, transparent 60%),
    radial-gradient(circle 560px at calc(var(--mx, 30%) - 15%) calc(var(--my, 20%) + 55%), color-mix(in srgb, var(--gradient-3) 35%, transparent) 0%, transparent 60%),
    var(--bg);
  filter: blur(60px) saturate(140%);
  transition: background 0.4s ease;
}

/* =============================================================
   5. Nav
   ============================================================= */
.nav {
  position: sticky; top: 0; z-index: 100;
  height: var(--nav-h);
  display: flex; align-items: center;
  background: rgba(10,14,22,0.6);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  border-bottom: 1px solid var(--line);
}
@supports not (backdrop-filter: blur(1px)) {
  .nav { background: rgba(10,14,22,0.94); }
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; width: 100%; }

.nav-logo { display: flex; align-items: center; gap: .6rem; font-weight: 700; font-size: 1.05rem; }
.nav-logo-mark {
  width: 34px; height: 34px; border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 0 0 1px var(--line);
}
.nav-logo-text { letter-spacing: -0.01em; }
.nav-logo-dim { color: var(--mute); font-weight: 500; margin-left: .15em; }

.nav-links { display: none; align-items: center; gap: 2rem; font-size: .95rem; color: var(--ink-soft); }
.nav-links a { position: relative; padding: .2rem 0; }
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: -2px;
  width: 0; height: 1px; background: var(--cream);
  transition: width .3s var(--ease-out);
}
.nav-links a:hover { color: var(--ink); }
.nav-links a:hover::after { width: 100%; }

.nav-actions { display: flex; align-items: center; gap: 1rem; }

.nav-burger {
  display: flex; flex-direction: column; gap: 5px; padding: .4rem;
}
.nav-burger span { width: 20px; height: 2px; background: var(--ink); transition: transform .3s var(--ease-out), opacity .3s var(--ease-out); }
.nav-burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* =============================================================
   6. Buttons
   ============================================================= */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: .85rem 1.6rem; border-radius: 999px;
  font-weight: 600; font-size: .95rem;
  transition: transform .3s var(--ease-out), box-shadow .3s var(--ease-out), background .3s var(--ease-out);
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--navy-2), var(--navy-3));
  color: var(--cream);
  box-shadow: 0 8px 24px -8px color-mix(in srgb, var(--navy-3) 60%, transparent);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 32px -8px color-mix(in srgb, var(--accent) 75%, transparent); }
.btn-ghost {
  color: var(--ink); border: 1px solid var(--line);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-small { padding: .6rem 1.15rem; font-size: .85rem; }

@media (max-width: 719px) {
  .nav-actions .btn-small { display: none; }
}

/* =============================================================
   7. Hero
   ============================================================= */
.hero {
  min-height: 92svh; min-height: 92vh;
  display: flex; align-items: center;
  padding-block: 4rem 3rem;
}
.hero-inner { max-width: 900px; }

.kicker {
  font-family: var(--mono); font-size: .8rem; letter-spacing: .06em;
  color: var(--mute); text-transform: uppercase; margin-bottom: 1.5rem;
}

.hero-title {
  font-size: clamp(2.6rem, 8.5vw, 6.2rem);
  font-weight: 700;
  max-width: 16ch;
  margin-bottom: 1.75rem;
}

.hero-sub {
  font-size: clamp(1.05rem, 1.6vw, 1.3rem);
  color: var(--ink-soft);
  max-width: 46ch;
  margin-bottom: 2.25rem;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 1rem; }

/* =============================================================
   8. Manifesto
   ============================================================= */
.manifesto { padding-block: 5rem; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.manifesto-text {
  font-size: clamp(1.3rem, 2.6vw, 1.9rem);
  line-height: 1.45;
  max-width: 42ch;
  margin-inline: auto;
  text-align: center;
  color: var(--ink-soft);
  font-family: var(--serif);
}
.manifesto-text strong { color: var(--ink); font-weight: 400; font-family: var(--sans); font-weight: 700; }

/* =============================================================
   9. Section headers (shared)
   ============================================================= */
.section-kicker {
  font-family: var(--mono); font-size: .8rem; letter-spacing: .06em;
  color: var(--cream); text-transform: uppercase; margin-bottom: 1rem;
}
.section-title {
  font-size: clamp(1.9rem, 4vw, 2.9rem);
  max-width: 20ch;
  margin-bottom: 3rem;
}

/* =============================================================
   10. Services — vertical expandable rows
   ============================================================= */
.services { padding-block: 6rem; }

.service-list { border-top: 1px solid var(--line); }
.service-row { border-bottom: 1px solid var(--line); }
.service-row summary {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  align-items: center;
  gap: 1rem 1.25rem;
  padding-block: 1.6rem;
  cursor: pointer;
  list-style: none;
  transition: color .3s var(--ease-out);
}
.service-row summary::-webkit-details-marker { display: none; }
.service-row summary:hover { color: var(--navy-3); }
.service-row summary:hover .service-num { color: var(--navy-3); }

.service-num { font-family: var(--mono); color: var(--mute); font-size: .95rem; }
.service-name {
  font-size: clamp(1.4rem, 3vw, 2.1rem);
  font-weight: 600;
  transition: transform .3s var(--ease-out);
}
.service-row[open] .service-name { color: var(--cream); }
.service-brief { color: var(--mute); font-size: .95rem; display: none; }
@media (min-width: 720px) { .service-brief { display: block; } }

.service-toggle {
  font-family: var(--mono); font-size: 1.4rem; color: var(--mute);
  width: 32px; height: 32px; display: grid; place-items: center;
  border-radius: 50%; border: 1px solid var(--line);
  transition: transform .35s var(--ease-out), background .3s var(--ease-out), border-color .3s var(--ease-out);
}
.service-row[open] .service-toggle {
  transform: rotate(45deg);
  background: var(--cream); color: var(--bg); border-color: var(--cream);
}

.service-detail { padding-bottom: 1.8rem; max-width: 62ch; }
.service-detail p { color: var(--ink-soft); font-size: 1.02rem; }

/* Smooth open/close for <details> */
.service-row summary { transition: color .3s var(--ease-out); }

/* =============================================================
   11. Process
   ============================================================= */
.process { padding-block: 6rem; border-top: 1px solid var(--line); }
.process-grid {
  display: grid; gap: 2.5rem;
  grid-template-columns: 1fr;
}
@media (min-width: 720px) { .process-grid { grid-template-columns: repeat(3, 1fr); gap: 2rem; } }

.process-step { position: relative; padding-top: 1.5rem; }
.process-step::before {
  content: ""; position: absolute; top: 0; left: 0; width: 40px; height: 2px;
  background: linear-gradient(90deg, var(--navy-3), var(--cream));
}
.process-num { display: block; font-size: .9rem; color: var(--mute); margin-bottom: .75rem; }
.process-step h3 { font-size: 1.3rem; margin-bottom: .6rem; }
.process-step p { color: var(--ink-soft); }

/* =============================================================
   12. Includes grid
   ============================================================= */
.includes { padding-block: 6rem; border-top: 1px solid var(--line); }
.includes-grid {
  list-style: none; display: grid; gap: 1.25rem;
  grid-template-columns: 1fr;
}
@media (min-width: 720px) { .includes-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .includes-grid { grid-template-columns: repeat(3, 1fr); } }

.includes-card {
  padding: 1.75rem;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: color-mix(in srgb, var(--bg-2) 60%, transparent);
  transition: transform .35s var(--ease-out), border-color .35s var(--ease-out);
}
.includes-card:hover { transform: translateY(-4px); border-color: color-mix(in srgb, var(--navy-3) 60%, var(--line)); }
.includes-icon { color: var(--cream); font-size: 1.1rem; display: block; margin-bottom: 1rem; }
.includes-card h3 { font-size: 1.1rem; margin-bottom: .5rem; }
.includes-card p { color: var(--mute); font-size: .95rem; }

/* =============================================================
   13. Contact CTA
   ============================================================= */
.cta-contact { padding-block: 7rem 6rem; text-align: center; border-top: 1px solid var(--line); }
.contact-title { font-size: clamp(2.2rem, 6vw, 4rem); margin-bottom: 2rem; }

.contact-link {
  position: relative;
  display: inline-block;
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(1.6rem, 5vw, 3rem);
  color: var(--cream);
  padding-bottom: .3rem;
}
.contact-link::after {
  content: ""; position: absolute; left: 0; bottom: 0; width: 100%; height: 2px;
  background: linear-gradient(90deg, var(--navy-3), var(--cream));
  transform: scaleX(0); transform-origin: left;
  transition: transform .4s var(--ease-out);
}
.contact-link:hover::after { transform: scaleX(1); }

.contact-alt { margin-top: 1.5rem; color: var(--mute); }
.contact-alt a { color: var(--ink-soft); text-decoration: underline; text-underline-offset: 3px; }
.contact-alt a:hover { color: var(--navy-3); }

/* =============================================================
   14. Footer
   ============================================================= */
.footer { padding-block: 2.5rem; border-top: 1px solid var(--line); }
.footer-inner {
  display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between;
  font-size: .875rem; color: var(--mute);
}
.footer-inner a:hover { color: var(--navy-3); }
.footer-brand { display: inline-flex; align-items: center; gap: .6rem; }
.footer-brand img { border-radius: 50%; }

/* =============================================================
   15. Responsive nav (mobile menu)
   ============================================================= */
@media (max-width: 719px) {
  .nav-links {
    position: fixed; inset: var(--nav-h) 0 auto 0;
    flex-direction: column; align-items: flex-start; gap: 0;
    background: var(--bg-2);
    border-bottom: 1px solid var(--line);
    padding: .5rem 1.5rem 1.5rem;
    transform: translateY(-8px);
    opacity: 0; pointer-events: none;
    transition: opacity .25s var(--ease-out), transform .25s var(--ease-out);
  }
  .nav-links.is-open { opacity: 1; transform: none; pointer-events: auto; }
  .nav-links a { width: 100%; padding: .9rem 0; border-bottom: 1px solid var(--line); }
}
@media (min-width: 720px) {
  .nav-links { display: flex; }
  .nav-burger { display: none; }
}

/* =============================================================
   16. Reduced motion — only intrusive effects
   ============================================================= */
@media (prefers-reduced-motion: reduce) {
  .hero-gradient { transition: none; }
  .reveal.is-ready { transition-duration: .2s; }
}