/* =============================================================
   1. Tokens
   ============================================================= */
:root {
  --bg:        #f3f8f8;
  --bg-soft:   #e9f4f3;
  --paper:     #ffffff;
  --glass:     rgba(255, 255, 255, 0.55);
  --glass-2:   rgba(255, 255, 255, 0.32);
  --glass-line:rgba(255, 255, 255, 0.6);
  --ink:       #0c2b32;
  --ink-soft:  #355861;
  --ink-mute:  #6b8890;
  --accent:    #0fb8a6;   /* turquesa */
  --accent-2:  #0a4f5e;   /* azul petróleo */
  --accent-soft: rgba(15, 184, 166, 0.14);
  --line:      rgba(12, 43, 50, 0.12);
  --cream:     #ffffff;

  --sans:  "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --display: "Sora", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;

  --ease-out:  cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in:   cubic-bezier(0.7, 0, 0.84, 0);
  --ease-soft: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);

  --radius: 22px;
  --radius-sm: 14px;
  --container: 1200px;
}

/* =============================================================
   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: 1.65;
  color: var(--ink-soft);
  background: var(--bg);
  -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%; }
img { height: auto; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
a { color: inherit; text-decoration: none; }
p { text-wrap: pretty; }
ul { list-style: none; padding: 0; }
h1, h2, h3, h4 { text-wrap: balance; line-height: 1.08; letter-spacing: -0.02em; color: var(--ink); font-family: var(--display); }
::selection { background: var(--accent); color: #fff; }

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

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

/* =============================================================
   3. Utilities
   ============================================================= */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: 1.25rem; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }
.section { padding-block: clamp(3.5rem, 8vw, 7rem); position: relative; }
.section-head { max-width: 60ch; margin-bottom: clamp(2rem, 5vw, 3.5rem); }
.eyebrow {
  display: inline-flex; align-items: center; gap: .5rem;
  font-size: .8rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
  color: var(--accent-2); margin-bottom: .9rem;
}
.eyebrow::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); display: inline-block; }
.section-title { font-size: clamp(1.9rem, 4vw, 2.8rem); margin-bottom: .9rem; }
.section-lead { font-size: 1.08rem; color: var(--ink-mute); max-width: 56ch; }

.grain { display: none; }

/* =============================================================
   4. Buttons
   ============================================================= */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  padding: .85rem 1.6rem; border-radius: 999px; font-weight: 600; font-size: .96rem;
  transition: transform .35s var(--ease-out), box-shadow .35s var(--ease-out), background .3s var(--ease-out);
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  color: #fff;
  box-shadow: 0 10px 30px -8px rgba(15, 184, 166, .55);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 36px -8px rgba(15, 184, 166, .65); }
.btn-ghost {
  background: var(--glass);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  border: 1px solid var(--glass-line);
  color: var(--ink);
}
.btn-ghost:hover { transform: translateY(-2px); background: var(--glass-2); }
.btn-outline {
  border: 1.5px solid var(--line);
  color: var(--ink);
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent-2); transform: translateY(-2px); }
.btn-sm { padding: .6rem 1.1rem; font-size: .85rem; }

/* =============================================================
   5. Nav
   ============================================================= */
.nav {
  position: sticky; top: 0; z-index: 500;
  padding-block: .6rem;
  background: rgba(243, 248, 248, 0.7);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.brand { display: flex; align-items: center; gap: .6rem; font-family: var(--display); font-weight: 700; font-size: 1.05rem; color: var(--ink); white-space: nowrap; flex-shrink: 0; }
.brand-mark {
  width: 34px; height: 34px; border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 800; font-size: .95rem;
}
.brand-logo-icon { height: 56px; width: auto; display: block; }
.nav-links { display: none; align-items: center; gap: 1.1rem; flex-wrap: nowrap; }
.nav-links a {
  font-size: .88rem; font-weight: 500; color: var(--ink-soft);
  position: relative; padding-bottom: 4px; white-space: nowrap;
}
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: 0; width: 0; height: 2px;
  background: var(--accent); transition: width .3s var(--ease-out);
}
.nav-links a:hover::after, .nav-links a[aria-current="page"]::after { width: 100%; }
.nav-links a[aria-current="page"] { color: var(--accent-2); font-weight: 600; }
.nav-cta { display: none; align-items: center; gap: .7rem; }
.nav-burger {
  display: inline-flex; width: 42px; height: 42px; border-radius: 12px;
  background: var(--glass); border: 1px solid var(--glass-line);
  align-items: center; justify-content: center;
}
.nav-burger span, .nav-burger span::before, .nav-burger span::after {
  content: ""; display: block; width: 18px; height: 2px; background: var(--ink); position: relative;
  transition: transform .3s var(--ease-out), opacity .3s var(--ease-out);
}
.nav-burger span::before { position: absolute; top: -6px; }
.nav-burger span::after { position: absolute; top: 6px; }
.nav-burger[aria-expanded="true"] span { background: transparent; }
.nav-burger[aria-expanded="true"] span::before { transform: translateY(6px) rotate(45deg); }
.nav-burger[aria-expanded="true"] span::after { transform: translateY(-6px) rotate(-45deg); }

.mobile-menu {
  position: fixed; inset: 0; z-index: 600;
  background: rgba(243, 248, 248, .98);
  backdrop-filter: blur(20px);
  display: flex; flex-direction: column; padding: 6rem 1.5rem 2rem;
  transform: translateY(-100%); transition: transform .45s var(--ease-out);
}
.mobile-menu.is-open { transform: translateY(0); }
.mobile-menu nav { display: flex; flex-direction: column; }
.mobile-menu nav a { display: block; font-size: 1.4rem; font-weight: 600; padding: .8rem 0; border-bottom: 1px solid var(--line); color: var(--ink); }
.mobile-menu .btn { display: inline-flex; margin-top: 1.5rem; }
.mobile-menu-close {
  position: absolute; top: 1.4rem; right: 1.4rem;
  width: 44px; height: 44px; border-radius: 12px; background: var(--glass);
  border: 1px solid var(--glass-line); display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
}

@media (min-width: 1300px) {
  .nav-links { display: flex; }
  .nav-cta { display: flex; }
  .nav-burger { display: none; }
}

/* =============================================================
   6. Hero
   ============================================================= */
.hero {
  position: relative;
  padding-block: clamp(2rem, 5vw, 3.5rem) clamp(3rem, 7vw, 5rem);
  overflow: visible;
}
.hero-mesh {
  position: absolute; inset: -10% -10% 10% -10%; z-index: -1;
  background:
    radial-gradient(at 15% 20%, rgba(15,184,166,.35) 0%, transparent 55%),
    radial-gradient(at 85% 10%, rgba(10,79,94,.28) 0%, transparent 55%),
    radial-gradient(at 50% 90%, rgba(15,184,166,.2) 0%, transparent 60%);
  filter: blur(60px) saturate(150%);
  animation: meshDrift 26s ease-in-out infinite;
}
@keyframes meshDrift {
  0%, 100% { transform: scale(1) rotate(0deg); }
  50%      { transform: scale(1.15) rotate(6deg); }
}
.hero-grid {
  display: grid; gap: 2.5rem; align-items: center;
}
.hero-kicker {
  display: inline-flex; align-items: center; gap: .5rem;
  font-size: .82rem; font-weight: 700; letter-spacing: .06em;
  color: var(--accent-2); background: var(--accent-soft);
  padding: .5rem 1rem; border-radius: 999px; margin-bottom: 1.2rem;
}
.hero-title {
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  max-width: 16ch;
}
.hero-title em { color: var(--accent-2); font-style: normal; }
.hero-sub {
  font-size: 1.15rem; color: var(--ink-mute); margin-top: 1.3rem; max-width: 46ch;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: .9rem; margin-top: 2rem; }
.hero-visual { position: relative; }
.hero-visual img {
  border-radius: var(--radius);
  box-shadow: 0 40px 80px -30px rgba(10, 79, 94, .35);
}
.hero-stat-card {
  position: absolute; bottom: -1.5rem; left: -1.5rem;
  background: var(--glass);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--glass-line);
  border-radius: var(--radius-sm);
  padding: 1rem 1.3rem;
  box-shadow: 0 20px 40px -20px rgba(10,79,94,.3);
}
.hero-stat-card strong { display: block; font-size: 1.6rem; color: var(--accent-2); font-family: var(--display); }
.hero-stat-card span { font-size: .8rem; color: var(--ink-mute); }

@media (min-width: 960px) {
  .hero-grid { grid-template-columns: 1.1fr 1fr; }
}

/* =============================================================
   7. Glass cards
   ============================================================= */
.glass-card {
  background: rgba(255,255,255,0.72);
  border: 1px solid var(--glass-line);
  border-radius: var(--radius);
  padding: 1.8rem;
  transition: transform .4s var(--ease-out), box-shadow .4s var(--ease-out);
}
@supports (backdrop-filter: blur(20px)) {
  .glass-card { background: var(--glass); backdrop-filter: blur(20px) saturate(180%); -webkit-backdrop-filter: blur(20px) saturate(180%); }
}
.glass-card:hover { transform: translateY(-6px); box-shadow: 0 24px 50px -20px rgba(10,79,94,.25); }

.icon-badge {
  width: 50px; height: 50px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff; margin-bottom: 1.1rem;
}
.icon-badge svg { width: 24px; height: 24px; }

.grid-cards { display: grid; gap: 1.4rem; }
@media (min-width: 720px) { .grid-cards.cols-2 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 960px) { .grid-cards.cols-3 { grid-template-columns: repeat(3, 1fr); } .grid-cards.cols-2 { grid-template-columns: repeat(2, 1fr); } }

.card-title { font-size: 1.18rem; margin-bottom: .5rem; }
.card-desc { font-size: .96rem; color: var(--ink-mute); }
.card-link { display: inline-flex; align-items: center; gap: .4rem; margin-top: 1rem; font-weight: 600; font-size: .9rem; color: var(--accent-2); }
.card-link::after { content: "→"; transition: transform .3s var(--ease-out); }
.glass-card:hover .card-link::after { transform: translateX(4px); }

/* =============================================================
   8. Sections — tech band / why choose
   ============================================================= */
.band-tech {
  background: linear-gradient(135deg, var(--accent-2) 0%, #0c3a44 100%);
  color: #fff; border-radius: var(--radius); margin-inline: 1.25rem;
  padding: clamp(2.5rem, 6vw, 4.5rem);
  position: relative; overflow: hidden;
}
.band-tech h2, .band-tech h3 { color: #fff; }
.band-tech .section-lead { color: rgba(255,255,255,.78); }
.band-tech::before {
  content: ""; position: absolute; inset: -40% -10% -60% -10%;
  background: radial-gradient(circle at 30% 30%, rgba(15,184,166,.4), transparent 60%);
  filter: blur(60px);
}
@media (min-width: 1280px) { .band-tech { margin-inline: auto; max-width: calc(var(--container) + 2.5rem); } }

.feature-list { display: grid; gap: 1.1rem; margin-top: 1.6rem; }
@media (min-width: 720px) { .feature-list { grid-template-columns: repeat(2, 1fr); } }
.feature-item { display: flex; gap: .8rem; align-items: flex-start; }
.feature-check {
  width: 26px; height: 26px; border-radius: 50%; flex-shrink: 0;
  background: rgba(15,184,166,.22); color: var(--accent);
  display: flex; align-items: center; justify-content: center; font-size: .8rem; font-weight: 800;
}
.band-tech .feature-check { background: rgba(255,255,255,.15); color: #6ff0e0; }
.feature-item strong { display: block; font-size: .98rem; color: var(--ink); }
.band-tech .feature-item strong { color: #fff; }
.feature-item p { font-size: .88rem; color: var(--ink-mute); }
.band-tech .feature-item p { color: rgba(255,255,255,.7); }

/* =============================================================
   9. Numbered solutions
   ============================================================= */
.solutions-list { display: grid; gap: 1.4rem; margin-top: 2rem; }
@media (min-width: 720px) { .solutions-list { grid-template-columns: repeat(2, 1fr); } }
.solution-row {
  display: flex; gap: 1.2rem; padding: 1.6rem;
  border: 1px solid var(--line); border-radius: var(--radius-sm);
  background: rgba(255,255,255,.5);
  transition: border-color .3s var(--ease-out), transform .3s var(--ease-out);
}
.solution-row:hover { border-color: var(--accent); transform: translateY(-3px); }
.solution-num { font-family: var(--display); font-size: 1.6rem; font-weight: 700; color: var(--accent); flex-shrink: 0; }
.solution-row h3 { font-size: 1.1rem; margin-bottom: .35rem; }
.solution-row p { font-size: .92rem; color: var(--ink-mute); }

.band-tech .solution-row {
  background: rgba(255,255,255,.08);
  border-color: rgba(255,255,255,.18);
}
.band-tech .solution-row h3 { color: #fff; }
.band-tech .solution-row p { color: rgba(255,255,255,.72); }
.band-tech .solution-num { color: #6ff0e0; }

/* =============================================================
   10. Lab / Moodle section
   ============================================================= */
.lab-section { display: grid; gap: 2rem; align-items: center; }
@media (min-width: 960px) { .lab-section { grid-template-columns: 1fr 1fr; } }
.lab-visual { position: relative; border-radius: var(--radius); overflow: hidden; }
.lab-visual img { width: 100%; }
.lab-tag {
  position: absolute; top: 1.2rem; left: 1.2rem;
  background: rgba(255,255,255,.85); backdrop-filter: blur(10px);
  padding: .5rem 1rem; border-radius: 999px; font-size: .78rem; font-weight: 700; color: var(--accent-2);
}

/* =============================================================
   11. Use cases strip
   ============================================================= */
.usecase-strip { display: flex; gap: 1rem; overflow-x: auto; overflow-y: visible; padding: .5rem .25rem 1.5rem; scroll-snap-type: x mandatory; }
.usecase-strip::-webkit-scrollbar { display: none; }
.usecase-card {
  flex: 0 0 auto; width: 250px; scroll-snap-align: start;
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: 1.5rem;
}
.usecase-card h3 { font-size: 1.02rem; margin-bottom: .4rem; }
.usecase-card p { font-size: .88rem; color: var(--ink-mute); }

/* =============================================================
   12. Final CTA
   ============================================================= */
.cta-final {
  text-align: center; border-radius: var(--radius);
  background: var(--glass); backdrop-filter: blur(20px) saturate(180%); -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--glass-line);
  padding: clamp(2.5rem, 6vw, 4.5rem);
  margin-inline: 1.25rem;
}
@media (min-width: 1280px) { .cta-final { margin-inline: auto; max-width: calc(var(--container) + 2.5rem); } }
.cta-final h2 { max-width: 32ch; margin-inline: auto; }
.cta-final p { max-width: 48ch; margin-inline: auto; margin-top: 1rem; color: var(--ink-mute); }
.cta-final .hero-actions { justify-content: center; margin-top: 1.8rem; }

/* =============================================================
   13. Footer
   ============================================================= */
.footer { background: var(--ink); color: rgba(255,255,255,.78); padding-block: 3.5rem 2rem; margin-top: 3rem; }
.footer .brand { color: #fff; margin-bottom: .8rem; }
.footer-grid { display: grid; gap: 2.2rem; }
@media (min-width: 720px) { .footer-grid { grid-template-columns: 2fr 1fr 1fr; } }
.footer h4 { color: #fff; font-size: .95rem; margin-bottom: .9rem; }
.footer ul li { margin-bottom: .55rem; font-size: .9rem; }
.footer ul a:hover { color: var(--accent); }
.footer-bottom {
  margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid rgba(255,255,255,.12);
  display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between; font-size: .82rem; color: rgba(255,255,255,.5);
}
.footer-bottom a { text-decoration: underline; }

/* =============================================================
   14. Page header (sub-pages)
   ============================================================= */
.page-header { padding-block: clamp(3rem, 7vw, 5rem) clamp(2rem, 5vw, 3rem); position: relative; }
.page-header .eyebrow { margin-bottom: 1rem; }
.page-header h1 { font-size: clamp(2.1rem, 5vw, 3.2rem); max-width: 26ch; }
.page-header p { margin-top: 1rem; font-size: 1.05rem; color: var(--ink-mute); max-width: 56ch; }
.breadcrumb { font-size: .85rem; color: var(--ink-mute); margin-bottom: 1rem; }
.breadcrumb a { color: var(--accent-2); }

/* =============================================================
   15. Blog
   ============================================================= */
.blog-grid { display: grid; gap: 1.6rem; }
@media (min-width: 720px) { .blog-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1280px) { .blog-grid { grid-template-columns: repeat(3, 1fr); } }
.post-card { border-radius: var(--radius-sm); overflow: hidden; background: var(--paper); border: 1px solid var(--line); transition: transform .35s var(--ease-out), box-shadow .35s var(--ease-out); }
.post-card:hover { transform: translateY(-5px); box-shadow: 0 20px 40px -22px rgba(10,79,94,.28); }
.post-card img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }
.post-body { padding: 1.4rem; }
.post-cat { font-size: .76rem; font-weight: 700; letter-spacing: .05em; color: var(--accent-2); text-transform: uppercase; }
.post-card h3 { font-size: 1.08rem; margin-block: .5rem; }
.post-date { font-size: .8rem; color: var(--ink-mute); }

/* =============================================================
   16. Contact
   ============================================================= */
.contact-grid { display: grid; gap: 2rem; }
@media (min-width: 960px) { .contact-grid { grid-template-columns: 1fr 1fr; } }
.form-field { margin-bottom: 1.1rem; }
.form-field label { display: block; font-size: .88rem; font-weight: 600; margin-bottom: .4rem; color: var(--ink); }
.form-field input, .form-field textarea, .form-field select {
  width: 100%; padding: .85rem 1rem; border-radius: 12px; border: 1.5px solid var(--line);
  background: var(--paper); font-family: var(--sans); font-size: .95rem; color: var(--ink);
  transition: border-color .25s var(--ease-out);
}
.form-field input:focus, .form-field textarea:focus, .form-field select:focus { border-color: var(--accent); }
.contact-info-card { display: flex; gap: 1rem; align-items: flex-start; margin-bottom: 1.4rem; }
.form-status { margin-top: 1rem; font-size: .9rem; font-weight: 600; }
.form-status.is-success { color: var(--accent-2); }

/* =============================================================
   17. FAQ accordion
   ============================================================= */
.faq-item { border-bottom: 1px solid var(--line); }
.faq-q {
  width: 100%; display: flex; justify-content: space-between; align-items: center;
  padding: 1.3rem 0; font-weight: 600; font-size: 1rem; color: var(--ink); text-align: left;
}
.faq-q .plus { transition: transform .3s var(--ease-out); color: var(--accent); font-size: 1.3rem; }
.faq-item[data-open="true"] .plus { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .35s var(--ease-out); font-size: .94rem; color: var(--ink-mute); }
.faq-a-inner { padding-bottom: 1.3rem; }

/* =============================================================
   18. Reveal on scroll
   ============================================================= */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s var(--ease-out), transform .7s var(--ease-out); }
.reveal.is-visible { opacity: 1; transform: none; }
.reveal[data-split] { opacity: 1; transform: none; }

/* =============================================================
   19. Marquee (logos / trust strip)
   ============================================================= */
.marquee { overflow: hidden; padding-block: 1.2rem; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.marquee-track { display: flex; gap: 3.5rem; width: max-content; animation: marqueeScroll 28s linear infinite; }
@keyframes marqueeScroll { from { transform: translateX(0); } to { transform: translateX(-50%); } }
.marquee-track span { font-size: .92rem; font-weight: 600; color: var(--ink-mute); white-space: nowrap; }
@media (prefers-reduced-motion: reduce) { .marquee-track { animation-duration: 50s; } }

/* =============================================================
   20. Responsive base adjustments
   ============================================================= */
@media (max-width: 539px) {
  .hero-stat-card { left: .8rem; bottom: -1.2rem; padding: .8rem 1rem; }
}

/* =============================================================
   21. WhatsApp floating button
   ============================================================= */
.whatsapp-float {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 700;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: #25D366;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 28px -6px rgba(0, 0, 0, .35);
  transition: transform .3s var(--ease-out), box-shadow .3s var(--ease-out);
}
.whatsapp-float:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 14px 32px -6px rgba(0, 0, 0, .4);
}
.whatsapp-float svg { width: 30px; height: 30px; }
.whatsapp-float .wa-pulse {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: #25D366;
  opacity: .55;
  animation: waPulse 2.4s ease-out infinite;
  z-index: -1;
}
@keyframes waPulse {
  0% { transform: scale(1); opacity: .55; }
  100% { transform: scale(1.7); opacity: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .whatsapp-float .wa-pulse { animation: none; display: none; }
}
@media (max-width: 539px) {
  .whatsapp-float { width: 52px; height: 52px; bottom: 1.1rem; right: 1.1rem; }
  .whatsapp-float svg { width: 26px; height: 26px; }
}