:root {
  --bg: #0f172a;
  --bg-elevated: #172033;
  --line: rgba(231, 224, 216, 0.16);
  --text: #f8fafc;
  --muted: #d5deea;
  --rose: #c98982;
  --sand: #e7e0d8;
  --teal: #5ee0ee;
  --indigo: #a5b4fc;
  --wa: #25d366;
  --wa-ink: #052e16;
  --shadow: 0 18px 40px rgba(2, 6, 23, 0.35);
  --radius: 16px;
  --header: 4.25rem;
  font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    radial-gradient(900px 420px at 100% -10%, rgba(201, 137, 130, 0.28), transparent 60%),
    radial-gradient(700px 380px at -10% 20%, rgba(20, 154, 171, 0.22), transparent 55%),
    var(--bg);
  color: var(--text);
  line-height: 1.6;
}

img { max-width: 100%; display: block; }

a { color: var(--teal); }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  background: var(--sand);
  color: var(--bg);
  padding: 0.5rem 0.8rem;
  border-radius: 12px;
  z-index: 20;
}

.skip-link:focus { top: 0.75rem; }

.container {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(15, 23, 42, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.header-bar {
  min-height: var(--header);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--sand);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.brand img {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 0 0 2px rgba(94, 224, 238, 0.45);
}

.nav-toggle { position: absolute; opacity: 0; pointer-events: none; }

.nav-toggle-btn {
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  display: grid;
  place-items: center;
  gap: 5px;
  cursor: pointer;
}

.nav-toggle-btn span:not(.sr-only) {
  display: block;
  width: 1.1rem;
  height: 2px;
  background: var(--sand);
}

.site-nav {
  display: none;
  position: absolute;
  left: 0;
  right: 0;
  top: var(--header);
  padding: 0.75rem 1rem 1rem;
  background: #121b2e;
  border-bottom: 1px solid var(--line);
  flex-direction: column;
  gap: 0.35rem;
}

.site-nav a {
  color: var(--sand);
  text-decoration: none;
  padding: 0.7rem 0.4rem;
  border-radius: 12px;
}

.site-nav a:hover,
.site-nav a:focus-visible { background: rgba(231, 224, 216, 0.08); }

.nav-toggle:checked ~ .site-nav { display: flex; }

.nav-toggle:focus-visible + .nav-toggle-btn {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

.hero { padding: 2.5rem 0 1rem; }

.hero-grid { display: grid; gap: 2rem; }

.eyebrow {
  margin: 0 0 0.6rem;
  color: var(--indigo);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1, h2, h3 { line-height: 1.2; letter-spacing: -0.02em; }

h1 {
  margin: 0 0 0.8rem;
  font-size: clamp(1.85rem, 6vw, 3.3rem);
}

h2 { margin: 0 0 0.6rem; font-size: clamp(1.5rem, 3vw, 2.15rem); }

h3 { margin: 0 0 0.45rem; font-size: 1.08rem; }

.lede, .section-head p { color: var(--muted); font-size: 1.05rem; }

.cta-row, .trust-badges { display: flex; flex-wrap: wrap; gap: 0.75rem; }

.cta-row { margin: 1.4rem 0 1.1rem; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.75rem 1.15rem;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 700;
  border: 1px solid transparent;
}

.btn:focus-visible { outline: 2px solid var(--sand); outline-offset: 3px; }

.btn-primary { background: var(--wa); color: var(--wa-ink); box-shadow: var(--shadow); }

.btn-primary:hover { filter: brightness(1.05); }

.btn-ghost {
  color: var(--sand);
  border-color: var(--line);
  background: transparent;
}

.btn-sm { min-height: 2.6rem; }

.trust-badges { list-style: none; padding: 0; margin: 0; }

.trust-badges li {
  border: 1px solid var(--line);
  background: rgba(23, 32, 51, 0.8);
  color: var(--sand);
  border-radius: 999px;
  padding: 0.4rem 0.75rem;
  font-size: 0.86rem;
}

.phone {
  margin: 0 auto;
  width: min(100%, 22.5rem);
  background: #0b1220;
  border: 1px solid rgba(231, 224, 216, 0.28);
  border-radius: 28px;
  padding: 0.7rem;
  box-shadow: var(--shadow);
}

.phone-notch {
  width: 38%;
  height: 0.45rem;
  margin: 0.15rem auto 0.6rem;
  border-radius: 999px;
  background: #1e293b;
}

.chat-head, .chat-input {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background: #111b2c;
  border-radius: 12px;
  padding: 0.55rem 0.7rem;
}

.chat-head small, .chat-input { color: var(--muted); font-size: 0.78rem; }

.chat-avatar {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--rose);
  color: #1c1010;
  font-size: 0.72rem;
  font-weight: 800;
}

.chat-thread {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: 0.8rem 0.15rem;
  min-height: 18rem;
}

.bubble {
  margin: 0;
  max-width: 88%;
  padding: 0.65rem 0.75rem;
  border-radius: 14px;
  font-size: 0.92rem;
  line-height: 1.45;
}

.bubble.out {
  align-self: flex-end;
  background: #14532d;
  color: #ecfdf3;
  border-bottom-right-radius: 4px;
}

.bubble.in {
  align-self: flex-start;
  background: #e7e0d8;
  color: #1c1917;
  border-bottom-left-radius: 4px;
}

.section { padding: 3.5rem 0; }

.section-alt {
  background: linear-gradient(180deg, rgba(23, 32, 51, 0.65), rgba(15, 23, 42, 0));
}

.section-head { max-width: 40rem; margin-bottom: 1.6rem; }

.cards, .steps, .demo-grid {
  display: grid;
  gap: 0.9rem;
}

.demo-grid { width: 100%; min-width: 0; }

.demo-card {
  width: 100%;
  max-width: 360px;
  min-width: 0;
  margin: 0 auto;
}

.demo-card video {
  display: block;
  width: 100%;
  max-width: 100%;
  min-width: 0;
  height: auto;
  aspect-ratio: 9 / 16;
  object-fit: contain;
  object-position: center;
  margin: 0 auto 1rem;
  border-radius: 16px;
  background: #0b1220;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.demo-points {
  margin: 0.85rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.45rem;
  color: var(--muted);
}

.card, .steps li, .faq details, .closing {
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 10px 24px rgba(2, 6, 23, 0.18);
}

.card, .steps li { padding: 1.1rem 1.15rem 1.2rem; }

.card p, .steps p, .faq p, .site-footer p { margin: 0; color: var(--muted); }

.steps { list-style: none; padding: 0; margin: 0; counter-reset: none; }

.steps li span {
  display: inline-grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  margin-bottom: 0.7rem;
  border-radius: 999px;
  background: var(--indigo);
  color: #1e1b4b;
  font-weight: 800;
}

.narrow { max-width: 46rem; }

.faq { display: grid; gap: 0.7rem; }

.faq summary {
  cursor: pointer;
  font-weight: 700;
  padding: 1rem 1.1rem;
}

.faq p { padding: 0 1.1rem 1rem; }

.closing {
  margin-top: 1.4rem;
  padding: 1.4rem 1.2rem;
  text-align: center;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 2rem 0 6.5rem;
}

.footer-grid { display: grid; gap: 1rem; }

.site-footer a { color: var(--sand); }

.copy { color: var(--muted); font-size: 0.9rem; }

.mobile-cta {
  position: fixed;
  left: 0.8rem;
  right: 0.8rem;
  bottom: 0.8rem;
  z-index: 12;
  min-height: 3.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: var(--wa);
  color: var(--wa-ink);
  text-decoration: none;
  font-weight: 800;
  box-shadow: var(--shadow);
}

/* ─────────────────────────────────────────────
   TECH GRID — Seção de Arquitetura / Stack
───────────────────────────────────────────── */
.tech-grid {
  display: grid;
  gap: 0.9rem;
}

.tech-block {
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 10px 24px rgba(2, 6, 23, 0.18);
  padding: 1.1rem 1.15rem 1.2rem;
}

.tech-block h3 { margin: 0 0 0.45rem; font-size: 1.08rem; }

.tech-block p {
  margin: 0 0 0.9rem;
  color: var(--muted);
  font-size: 1rem;
}

/* Tech pills / badges */
.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.tech-tags li {
  background: rgba(165, 180, 252, 0.12);
  border: 1px solid rgba(165, 180, 252, 0.3);
  color: var(--indigo);
  border-radius: 999px;
  padding: 0.25rem 0.7rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

@media (min-width: 860px) {
  .nav-toggle-btn { display: none; }

  .site-nav {
    position: static;
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 0.35rem;
    padding: 0;
    background: transparent;
    border: 0;
  }

  .site-nav .btn { margin-left: 0.4rem; }

  .hero { padding: 4.5rem 0 2rem; }

  .hero-grid {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
  }

  .cards, .steps { grid-template-columns: repeat(3, 1fr); }

  .demo-grid { grid-template-columns: 1fr 1fr; align-items: start; }

  .tech-grid { grid-template-columns: repeat(3, 1fr); }

  .footer-grid {
    grid-template-columns: 1.4fr 1fr;
    align-items: start;
  }

  .copy { grid-column: 1 / -1; }

  .mobile-cta { display: none; }

  .site-footer { padding-bottom: 2.5rem; }
}

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