/* =============================================================
   1. Tokens
   ============================================================= */
:root {
  --bg:        #08090b;   /* near-black, cool-toned */
  --bg-2:      #0e1014;
  --card:      #14171c;
  --card-2:    #191d23;
  --ink:       #f2f3f5;   /* near-white, never pure #fff */
  --ink-mute:  #9aa0aa;
  --ink-dim:   #5c626c;

  --accent:    #a855f7;   /* modern tech purple — Delta */
  --accent-2:  #c084fc;
  --accent-deep: #7c3aed;
  --accent-ink:#ffffff;
  --danger:    #ff5c72;   /* used only in the "them" comparison column */

  --line:      rgba(242,243,245,0.09);
  --line-2:    rgba(242,243,245,0.16);

  --display: "Sora", system-ui, sans-serif;
  --sans: "Plus Jakarta Sans", system-ui, -apple-system, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --gutter: 1.25rem;
  --container: 1180px;
  --radius: 16px;
}

/* =============================================================
   2. Reset & base
   ============================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html { -webkit-text-size-adjust: 100%; tab-size: 2; scroll-behavior: smooth; }
body {
  position: relative;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  overscroll-behavior-y: none;
}
/* Global cursor glow — fixed to the viewport so it persists across every
   section instead of cutting off at the hero's boundary. On fine-pointer
   devices JS updates --mx/--my on scroll+mousemove; everywhere else (touch,
   small screens) it just sits at the CSS fallback position as a static glow. */
.cursor-glow {
  position: fixed;
  inset: 0;
  z-index: -3;
  pointer-events: none;
  background:
    radial-gradient(circle 620px at var(--mx, 50%) var(--my, 22%), rgba(168,85,247,0.30), transparent 62%),
    radial-gradient(circle 780px at calc(var(--mx, 50%) + 14%) calc(var(--my, 22%) + 18%), rgba(192,132,252,0.14), transparent 68%);
  filter: blur(30px);
  transition: background .4s ease-out;
}
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 {
  font-family: var(--display);
  text-wrap: balance;
  line-height: 1.08;
  letter-spacing: -0.01em;
  font-weight: 700;
}
.hl { color: var(--accent); }
::selection { background: var(--accent); color: var(--accent-ink); }

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

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

/* =============================================================
   3. Utilities
   ============================================================= */
.skip-link {
  position: fixed; top: -100px; left: 1rem;
  padding: .6rem 1rem; background: var(--accent); color: var(--accent-ink);
  z-index: 9999; border-radius: 8px; font-weight: 600;
}
.skip-link:focus { top: 1rem; }

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.eyebrow {
  display: inline-block;
  color: var(--accent);
  font-family: var(--mono);
  font-weight: 500;
  letter-spacing: .04em;
  text-transform: uppercase;
  font-size: .78rem;
  margin-bottom: .9rem;
}
.eyebrow-center { display: block; text-align: center; }

/* =============================================================
   4. Buttons
   ============================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .85rem 1.6rem;
  border-radius: 10px;
  font-weight: 600;
  font-size: .95rem;
  white-space: nowrap;
  transition: transform .3s var(--ease-out), box-shadow .3s var(--ease-out), background .3s var(--ease-out);
}
.btn-primary {
  background: var(--accent);
  color: var(--accent-ink);
  box-shadow: 0 8px 24px -8px rgba(168,85,247,0.55);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 32px -6px rgba(168,85,247,0.75); background: var(--accent-2); }
.btn-ghost {
  border: 1px solid var(--line-2);
  color: var(--ink);
  background: rgba(242,243,245,0.03);
}
.btn-ghost:hover { transform: translateY(-2px); background: rgba(242,243,245,0.07); border-color: var(--accent); }
.btn-lg { padding: 1rem 2rem; font-size: 1rem; }
.btn-sm { padding: .55rem 1.1rem; font-size: .85rem; }
.btn-block { width: 100%; }
.ico-wsp { width: 20px; height: 20px; flex-shrink: 0; }

/* =============================================================
   5. Nav
   ============================================================= */
.nav {
  position: sticky;
  top: 0;
  z-index: 200;
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1rem;
}
.nav-brand {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.15rem;
  display: flex;
  align-items: center;
  gap: .4rem;
}
.nav-delta { color: var(--accent); font-size: 1.35rem; }
.nav-links { display: none; }
.nav-cta { display: none; }

.nav-burger {
  width: 40px; height: 40px;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 5px;
}
.nav-burger span {
  width: 22px; 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); }

.mobile-menu {
  position: fixed;
  inset: 0;
  top: 0;
  padding-top: 88px;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.75rem;
  padding-bottom: 3rem;
  transform: translateY(-8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s var(--ease-out), transform .3s var(--ease-out);
  z-index: 150;
}
.mobile-menu.is-open { opacity: 1; transform: translateY(0); pointer-events: auto; }
.mobile-menu a { font-family: var(--display); font-size: 1.35rem; font-weight: 600; }
.mobile-menu .btn { margin-top: 1rem; }

/* =============================================================
   6. Hero
   ============================================================= */
.hero {
  position: relative;
  padding-block: 6rem 4rem;
  overflow: clip;
  isolation: isolate;
}
.hero-bg { position: absolute; inset: 0; z-index: -1; }
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 20%, black 40%, transparent 90%);
}
.hero-delta-mark {
  position: absolute;
  top: -8%;
  right: -4%;
  font-family: var(--display);
  font-size: min(60vw, 42rem);
  line-height: 1;
  color: var(--ink);
  opacity: .035;
  pointer-events: none;
  user-select: none;
}
.hero-inner { text-align: center; }
.kicker {
  display: inline-block;
  font-family: var(--mono);
  color: var(--accent);
  font-size: .8rem;
  letter-spacing: .06em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}
.hero-title {
  font-size: clamp(2.3rem, 8.5vw, 4.2rem);
  max-width: 18ch;
  margin-inline: auto;
}
.hero-sub {
  margin: 1.5rem auto 0;
  max-width: 50ch;
  color: var(--ink-mute);
  font-size: 1.05rem;
}
.hero-actions {
  margin-top: 2.25rem;
  display: flex;
  flex-direction: column;
  gap: .85rem;
}
.hero-actions .btn { width: 100%; }

/* =============================================================
   7. Sections
   ============================================================= */
.section { padding-block: 4rem; }
.section-alt { background: transparent; border-block: 1px solid var(--line); }
.section-title {
  font-size: clamp(1.7rem, 5.5vw, 2.4rem);
  text-align: center;
  margin-bottom: 1.5rem;
}
.section-title-left { text-align: left; }

/* =============================================================
   8. El Efecto Delta
   ============================================================= */
.efecto-grid { display: grid; gap: 2.5rem; }
.efecto-copy { color: var(--ink-mute); margin-top: 1.25rem; max-width: 56ch; }

.contrast-visual {
  display: flex;
  flex-direction: column;
  padding-block: 1rem;
  max-width: 340px;
  margin-inline: auto;
}
.contrast-card {
  border-radius: var(--radius);
  padding: 1.5rem 1.75rem;
  border: 1px solid var(--line);
}
.contrast-head { display: flex; align-items: center; justify-content: space-between; gap: .75rem; margin-bottom: .25rem; }
.contrast-icon { width: 26px; height: 26px; flex-shrink: 0; margin-bottom: 0; }
.contrast-stat { font-family: var(--mono); font-size: .7rem; text-transform: uppercase; letter-spacing: .04em; font-weight: 600; }
.contrast-chart { width: 100%; height: 46px; margin-block: .85rem .9rem; }
.contrast-label { font-family: var(--display); font-weight: 700; font-size: 1.05rem; margin-bottom: .4rem; }
.contrast-desc { font-size: .88rem; color: var(--ink-mute); }

.contrast-card-bad {
  background: var(--card);
  color: var(--ink-dim);
  transform: rotate(-2deg);
  opacity: .8;
}
.contrast-card-bad .contrast-icon { color: var(--danger); opacity: .8; }
.contrast-card-bad .contrast-label { color: var(--ink-mute); }
.contrast-stat-bad { color: var(--danger); }

.contrast-card-good {
  background: linear-gradient(155deg, var(--card-2), var(--card));
  border-color: rgba(168,85,247,0.5);
  box-shadow: 0 24px 48px -20px rgba(168,85,247,0.45);
  transform: rotate(1.5deg) translateY(-4px);
  margin-top: -2.25rem;
  margin-left: auto;
  width: 92%;
  position: relative;
  z-index: 2;
}
.contrast-card-good .contrast-icon { color: var(--accent); }
.contrast-stat-good { color: var(--accent); }

/* =============================================================
   9. Servicios / pilares
   ============================================================= */
.pillars {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-top: 2.5rem;
}
.pillar-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: transform .3s var(--ease-out), border-color .3s var(--ease-out), box-shadow .3s var(--ease-out);
}
.pillar-card:hover {
  transform: translateY(-4px);
  border-color: rgba(168,85,247,0.5);
  box-shadow: 0 20px 40px -22px rgba(168,85,247,0.5);
}
.pillar-index {
  display: block;
  font-family: var(--mono);
  color: var(--accent);
  font-size: .85rem;
  margin-bottom: 1rem;
}
.pillar-card h3 { font-size: 1.15rem; margin-bottom: .6rem; }
.pillar-card p { color: var(--ink-mute); font-size: .93rem; }

/* =============================================================
   10. Por qué nosotros / comparación
   ============================================================= */
.pqn-copy { color: var(--ink-mute); max-width: 62ch; margin: 0 auto 2.5rem; text-align: center; }

.compare {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  max-width: 800px;
  margin-inline: auto;
}
.compare-col {
  border-radius: var(--radius);
  padding: 1.75rem;
  border: 1px solid var(--line);
}
.compare-us { background: var(--card); border-color: rgba(168,85,247,0.35); }
.compare-them { background: transparent; }
.compare-col h3 { font-size: 1rem; margin-bottom: 1rem; font-family: var(--sans); }
.compare-us h3 { color: var(--accent); }
.compare-them h3 { color: var(--ink-dim); }
.compare-col ul { list-style: none; display: flex; flex-direction: column; gap: .75rem; }
.compare-col li { padding-left: 1.6rem; position: relative; font-size: .92rem; color: var(--ink-mute); }
.compare-us li::before { content: "✓"; position: absolute; left: 0; color: var(--accent); font-weight: 700; }
.compare-them li::before { content: "✕"; position: absolute; left: 0; color: var(--danger); opacity: .6; }

/* =============================================================
   11. Contacto
   ============================================================= */
.contacto-grid { display: grid; gap: 2.5rem; }
.contacto-copy { color: var(--ink-mute); margin-top: 1.25rem; max-width: 50ch; }
.contacto-alt { margin-top: 1.5rem; font-size: .92rem; color: var(--ink-dim); }
.link-arrow { color: var(--accent); font-weight: 600; }
.link-arrow:hover { text-decoration: underline; }

.contacto-form {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}
.field { display: flex; flex-direction: column; gap: .45rem; }
.field label { font-size: .85rem; font-weight: 600; color: var(--ink-mute); }
.field .opt { font-weight: 400; color: var(--ink-dim); }
.field input, .field textarea {
  background: var(--bg);
  border: 1px solid var(--line-2);
  border-radius: 10px;
  padding: .75rem .9rem;
  color: var(--ink);
  font-family: var(--sans);
  font-size: .95rem;
  color-scheme: dark;
  transition: border-color .3s var(--ease-out);
}
.field input:focus, .field textarea:focus { border-color: var(--accent); }
.field textarea { resize: vertical; min-height: 80px; }

.form-fallback { font-size: .85rem; color: var(--ink-dim); text-align: center; }
.form-fallback a { color: var(--accent); text-decoration: underline; }

/* =============================================================
   12. Footer
   ============================================================= */
.footer { padding-block: 3rem 1.5rem; border-top: 1px solid var(--line); }
.footer-grid { display: grid; gap: 2rem; margin-bottom: 2rem; }
.footer h3 { font-family: var(--sans); font-size: .9rem; text-transform: uppercase; letter-spacing: .04em; color: var(--ink-mute); margin-bottom: .75rem; }
.footer p { color: var(--ink-mute); font-size: .92rem; margin-bottom: .3rem; }
.footer p a { color: var(--accent); }
.footer-tag { margin-top: .5rem; color: var(--ink-dim); }
.footer-bottom { border-top: 1px solid var(--line); padding-top: 1.5rem; color: var(--ink-dim); font-size: .82rem; }

/* =============================================================
   13. WhatsApp flotante
   ============================================================= */
.wsp-float {
  position: fixed;
  right: 1.1rem;
  bottom: 1.1rem;
  width: 58px; height: 58px;
  border-radius: 50%;
  background: #25D366;
  color: #0b1a10;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 10px 28px -8px rgba(37,211,102,0.6);
  z-index: 300;
  transition: transform .3s var(--ease-out);
}
.wsp-float svg { width: 30px; height: 30px; }
.wsp-float:hover { transform: scale(1.08); }
.wsp-float-ring {
  position: absolute; inset: 0; border-radius: 50%;
  border: 2px solid #25D366;
  animation: wspPing 2.4s var(--ease-out) infinite;
}
@keyframes wspPing {
  0%   { transform: scale(1); opacity: .6; }
  100% { transform: scale(1.7); opacity: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .wsp-float-ring { animation: none; }
}

/* =============================================================
   14. Reveal on scroll
   ============================================================= */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s var(--ease-out), transform .6s var(--ease-out); }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* =============================================================
   15. Responsive (mobile-first)
   ============================================================= */
@media (min-width: 540px) {
  .pillars { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 720px) {
  .hero-actions { flex-direction: row; justify-content: center; }
  .hero-actions .btn { width: auto; }
  .compare { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 960px) {
  .nav-links { display: flex; gap: 1.75rem; font-weight: 500; font-size: .93rem; }
  .nav-links a:hover { color: var(--accent); }
  .nav-cta { display: inline-flex; }
  .nav-burger { display: none; }

  .hero { padding-block: 8rem 6rem; }
  .hero-title { font-size: clamp(3rem, 5.5vw, 4.8rem); }

  .efecto-grid { grid-template-columns: 1.1fr .9fr; align-items: center; }
  .pillars { grid-template-columns: repeat(3, 1fr); }
  .contacto-grid { grid-template-columns: .9fr 1.1fr; align-items: start; }
  .footer-grid { grid-template-columns: 1.2fr 1fr 1fr; }
}