:root {
  --teal-900: #134e4a;
  --teal-800: #115e59;
  --teal-700: #0f766e;
  --teal-500: #14b8a6;
  --teal-100: #ccfbf1;
  --teal-50: #f0fdfa;
  --wpp: #25d366;
  --wpp-dark: #1eb456;
  --ink: #0f172a;
  --gray-600: #475569;
  --gray-100: #f1f5f9;
  --gray-50: #f8fafc;
  --white: #ffffff;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(2, 32, 27, 0.08);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  color: var(--ink);
  line-height: 1.6;
  background: var(--white);
}
h1, h2, h3 { line-height: 1.2; font-weight: 700; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }

.container { max-width: 1140px; margin: 0 auto; padding: 0 20px; }
.container-narrow { max-width: 760px; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 22px; border-radius: 10px; font-weight: 600; font-size: 16px;
  transition: transform .12s ease, background .15s ease, box-shadow .15s ease;
  cursor: pointer; border: none;
}
.btn:hover { transform: translateY(-1px); }
.btn-wpp { background: var(--wpp); color: #fff; }
.btn-wpp:hover { background: var(--wpp-dark); }
.btn-ghost { background: transparent; color: var(--white); border: 1.5px solid rgba(255,255,255,.55); }
.btn-ghost:hover { background: rgba(255,255,255,.12); }
.btn-lg { padding: 16px 30px; font-size: 18px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.9); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--gray-100);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { font-size: 24px; font-weight: 800; color: var(--teal-800); letter-spacing: -.5px; }
.brand span { color: var(--teal-500); }
.nav { display: flex; align-items: center; gap: 26px; }
.nav a { color: var(--gray-600); font-weight: 500; font-size: 15px; }
.nav a:hover { color: var(--teal-700); }
.nav .nav-cta { background: var(--teal-700); color: #fff; padding: 9px 16px; border-radius: 8px; font-weight: 600; }
.nav .nav-cta:hover { background: var(--teal-800); color: #fff; }
.nav-toggle { display: none; background: none; border: none; font-size: 26px; cursor: pointer; color: var(--teal-800); }

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--teal-700), var(--teal-900));
  color: #fff; padding: 72px 0;
}
.hero-inner { display: flex; align-items: center; gap: 48px; }
.hero-copy { flex: 1; }
.hero h1 { font-size: 44px; font-weight: 800; margin-bottom: 18px; letter-spacing: -1px; }
.hero-copy > p { font-size: 21px; color: var(--teal-100); margin-bottom: 28px; max-width: 560px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; }
.hero-note { font-size: 14px; color: rgba(255,255,255,.75); margin-top: 18px; }

.hero-card { flex: 0 0 360px; }
.chat {
  background: rgba(255,255,255,.1); backdrop-filter: blur(6px);
  border: 1px solid rgba(255,255,255,.18); border-radius: 20px; padding: 18px;
  display: flex; flex-direction: column; gap: 10px;
}
.msg { max-width: 80%; padding: 10px 14px; border-radius: 14px; font-size: 14.5px; }
.msg.in { background: rgba(255,255,255,.16); align-self: flex-start; border-bottom-left-radius: 4px; }
.msg.out { background: var(--wpp); color: #fff; align-self: flex-end; border-bottom-right-radius: 4px; }
.typing { align-self: flex-start; display: flex; gap: 4px; padding: 8px 4px; }
.typing span { width: 7px; height: 7px; background: rgba(255,255,255,.6); border-radius: 50%; animation: blink 1.2s infinite; }
.typing span:nth-child(2) { animation-delay: .2s; }
.typing span:nth-child(3) { animation-delay: .4s; }
@keyframes blink { 0%,60%,100% { opacity: .3; } 30% { opacity: 1; } }

/* Sections */
.section { padding: 80px 0; }
.section-alt { background: var(--gray-50); }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 52px; }
.section-head h2 { font-size: 34px; margin-bottom: 14px; letter-spacing: -.5px; }
.section-head p { font-size: 18px; color: var(--gray-600); }

.grid { display: grid; gap: 26px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card, .step, .panel {
  background: var(--white); border: 1px solid var(--gray-100);
  border-radius: var(--radius); padding: 28px;
}
.section-alt .card { background: #fff; }
.card .icon, .step .icon { font-size: 30px; margin-bottom: 14px; display: inline-block;
  background: var(--teal-50); width: 56px; height: 56px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center; }
.card h3, .step h3 { font-size: 18.5px; margin-bottom: 8px; }
.card p, .step p { color: var(--gray-600); font-size: 15.5px; }
.card.center { text-align: center; }
.card.center .icon { margin: 0 auto 14px; }
.step { text-align: center; border: none; background: transparent; }
.step .icon { margin: 0 auto 16px; width: 64px; height: 64px; box-shadow: var(--shadow); background: var(--teal-50); }

.detail { margin-top: 40px; }
.panel { background: var(--gray-50); }
.section-alt .panel { background: #fff; }
.panel h3 { font-size: 21px; margin-bottom: 12px; }
.panel p { color: var(--gray-600); margin-bottom: 14px; }
.panel ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.panel li { color: var(--gray-600); padding-left: 22px; position: relative; }
.panel li::before { content: "✓"; position: absolute; left: 0; color: var(--teal-600, var(--teal-700)); font-weight: 700; }

/* CTA band */
.cta-band { background: linear-gradient(135deg, var(--teal-700), var(--teal-800)); color: #fff; padding: 70px 0; }
.cta-inner { text-align: center; max-width: 680px; }
.cta-inner h2 { font-size: 32px; margin-bottom: 14px; }
.cta-inner p { font-size: 18px; color: var(--teal-100); margin-bottom: 28px; }

/* FAQ */
.faq { display: flex; flex-direction: column; gap: 12px; }
.faq-item { background: #fff; border: 1px solid var(--gray-100); border-radius: 12px; overflow: hidden; }
.faq-q {
  width: 100%; text-align: left; background: none; border: none; cursor: pointer;
  padding: 18px 22px; font-size: 16.5px; font-weight: 600; color: var(--ink);
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
}
.faq-q span { color: var(--teal-700); font-size: 24px; font-weight: 400; flex-shrink: 0; transition: transform .2s; }
.faq-item.open .faq-q span { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .25s ease; }
.faq-a p { padding: 0 22px 18px; color: var(--gray-600); }

/* Footer */
.site-footer { background: #0b1220; color: #fff; padding: 56px 0 28px; }
.footer-inner { display: flex; justify-content: space-between; gap: 40px; flex-wrap: wrap; }
.footer-brand { max-width: 420px; }
.footer-brand h2 { font-size: 24px; margin-bottom: 12px; }
.footer-brand p { color: #94a3b8; margin-bottom: 18px; }
.footer-links h3 { font-size: 16px; margin-bottom: 14px; }
.footer-links ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-links a { color: #94a3b8; }
.footer-links a:hover { color: #fff; }
.footer-bottom { margin-top: 36px; padding-top: 20px; border-top: 1px solid #1e293b; }
.footer-bottom p { color: #64748b; font-size: 14px; }

/* WhatsApp float */
.wpp-float {
  position: fixed; right: 22px; bottom: 22px; z-index: 60;
  width: 58px; height: 58px; border-radius: 50%; background: var(--wpp);
  display: flex; align-items: center; justify-content: center; font-size: 28px;
  box-shadow: 0 8px 24px rgba(37,211,102,.45); transition: transform .15s;
}
.wpp-float:hover { transform: scale(1.08); }

/* Responsive */
@media (max-width: 880px) {
  .nav { position: fixed; top: 68px; left: 0; right: 0; background: #fff;
    flex-direction: column; gap: 0; padding: 8px 0; border-bottom: 1px solid var(--gray-100);
    box-shadow: var(--shadow); transform: translateY(-130%); transition: transform .25s; }
  .nav.open { transform: translateY(0); }
  .nav a { width: 100%; padding: 13px 24px; }
  .nav .nav-cta { margin: 8px 24px; text-align: center; justify-content: center; }
  .nav-toggle { display: block; }
  .hero-inner { flex-direction: column; text-align: center; }
  .hero h1 { font-size: 34px; }
  .hero-copy > p { margin-left: auto; margin-right: auto; }
  .hero-cta { justify-content: center; }
  .hero-card { flex: 1; width: 100%; max-width: 380px; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .section { padding: 56px 0; }
  .section-head h2 { font-size: 27px; }
}