/* ============================================================
   Checka — Site (pré-launch comercial)
   Identidade: docs/brand/brand-guidelines.md
   Última atualização: 2026-05-27
   ============================================================ */

/* === Tokens (espelho de docs/brand/colors.css + typography.css) === */
:root {
  /* Cores principais */
  --checka-ink:      #0A0A0B;
  --checka-paper:    #FAFAF7;
  --checka-amber:    #C58D3F;
  --checka-graphite: #3F3F46;
  --checka-mist:     #A1A1AA;

  --color-amber-soft:  rgba(197, 141, 63, 0.18);
  --color-amber-hover: #B07E37;
  --color-amber-dim:   rgba(197, 141, 63, 0.65);

  --border-soft: rgba(63, 63, 70, 0.12);
  --border-soft-invert: rgba(250, 250, 247, 0.14);

  /* Tipografia */
  --font-display: 'Fraunces', Georgia, 'Times New Roman', serif;
  --font-body:    'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono:    'JetBrains Mono', 'Courier New', monospace;

  /* Layout */
  --max-page:    1100px;
  --max-narrow:  720px;
  --pad-x:       clamp(1.25rem, 4vw, 2.5rem);

  /* Sombras */
  --shadow-soft:   0 1px 3px rgba(10, 10, 11, 0.06), 0 1px 2px rgba(10, 10, 11, 0.04);
  --shadow-medium: 0 8px 30px rgba(10, 10, 11, 0.08);
  --shadow-amber:  0 4px 20px rgba(197, 141, 63, 0.20);
}

/* === Reset === */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--checka-ink);
  background: var(--checka-paper);
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; height: auto; display: block; }
a { color: var(--checka-ink); text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
ul, ol { list-style: none; padding: 0; margin: 0; }

/* === Layout primitives === */
.container {
  max-width: var(--max-page);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}
.container--narrow { max-width: var(--max-narrow); }

.section {
  padding: clamp(3.5rem, 7vw, 6rem) 0;
}
.section--paper {
  background: var(--checka-paper);
  border-top: 1px solid var(--border-soft);
}
.section--ink {
  background: var(--checka-ink);
  color: var(--checka-paper);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--checka-graphite);
  margin: 0 0 1.25rem;
  font-weight: 500;
}
.eyebrow--invert { color: var(--color-amber-dim); }

.section-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--checka-ink);
  margin: 0 0 1rem;
  max-width: 22ch;
}
.section-title--invert { color: var(--checka-paper); }
.section-title .amber { color: var(--checka-amber); }
.section-title em { font-style: italic; font-weight: 600; }

.section-sub {
  font-size: 1.125rem;
  line-height: 1.6;
  color: var(--checka-graphite);
  margin: 0 0 2.5rem;
  max-width: 50ch;
}
.section-sub--invert { color: rgba(250, 250, 247, 0.78); }

.section-foot {
  margin-top: 2.5rem;
  font-size: 1rem;
  color: var(--checka-graphite);
  max-width: 60ch;
}
.fineprint {
  font-size: 0.8125rem;
  color: var(--checka-mist);
  line-height: 1.55;
}

.amber { color: var(--checka-amber); }
em { font-style: italic; }

/* === Botões === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.9375rem;
  border-radius: 999px;
  border: 1px solid transparent;
  text-decoration: none;
  transition: transform 0.15s ease, background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
  cursor: pointer;
  white-space: nowrap;
}
.btn--lg { padding: 1rem 1.75rem; font-size: 1rem; }
.btn--block { width: 100%; }

.btn--primary {
  background: var(--checka-ink);
  color: var(--checka-paper);
}
.btn--primary:hover { background: #1a1a1d; transform: translateY(-1px); }

.btn--amber {
  background: var(--checka-amber);
  color: var(--checka-ink);
  font-weight: 700;
}
.btn--amber:hover { background: var(--color-amber-hover); transform: translateY(-1px); box-shadow: var(--shadow-amber); }

.btn--ghost {
  background: transparent;
  color: var(--checka-ink);
  border-color: var(--border-soft);
}
.btn--ghost:hover { border-color: var(--checka-ink); }

.section--ink .btn--ghost {
  color: var(--checka-paper);
  border-color: var(--border-soft-invert);
}
.section--ink .btn--ghost:hover { border-color: var(--checka-paper); }

/* === Status badge / dot === */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: lowercase;
  letter-spacing: 0.04em;
  color: var(--checka-graphite);
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--border-soft);
  border-radius: 999px;
}

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--checka-amber);
  box-shadow: 0 0 0 4px var(--color-amber-soft);
  animation: pulse 2.4s ease-in-out infinite;
  flex-shrink: 0;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 4px var(--color-amber-soft); }
  50%      { box-shadow: 0 0 0 8px rgba(197, 141, 63, 0.04); }
}

.tag {
  display: inline-block;
  padding: 0.35rem 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.03em;
  border-radius: 999px;
  background: var(--color-amber-soft);
  color: var(--color-amber-hover);
  font-weight: 500;
}
.tag--amber { color: var(--color-amber-hover); }

/* === NAV === */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 250, 247, 0.92);
  backdrop-filter: saturate(140%) blur(12px);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--border-soft);
}
.nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand { display: inline-flex; align-items: center; }
.brand-mark { height: 28px; width: auto; }
.brand-mark--dark { display: none; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  font-size: 0.9375rem;
  color: var(--checka-graphite);
}
.nav-links a {
  color: var(--checka-graphite);
  font-weight: 500;
  transition: color 0.15s;
}
.nav-links a:hover { color: var(--checka-ink); }
.nav-links .nav-cta { padding: 0.55rem 1.15rem; font-size: 0.875rem; }

.menu-toggle {
  display: none;
  background: none;
  border: none;
  width: 40px;
  height: 40px;
  padding: 8px;
  flex-direction: column;
  justify-content: space-around;
}
.menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--checka-ink);
  transition: transform 0.2s, opacity 0.2s;
}
.menu-toggle.is-open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.menu-toggle.is-open span:nth-child(2) { opacity: 0; }
.menu-toggle.is-open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* === HERO === */
.hero {
  padding: clamp(4rem, 9vw, 7rem) 0 clamp(3rem, 7vw, 5rem);
  background: radial-gradient(ellipse 80% 60% at 50% 30%, rgba(197, 141, 63, 0.05) 0%, transparent 70%), var(--checka-paper);
  text-align: center;
}
.hero-inner { max-width: var(--max-narrow); margin: 0 auto; }

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-amber-hover);
  margin: 0 0 1.5rem;
  font-weight: 500;
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.5rem, 7vw, 4.75rem);
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin: 0 0 1.5rem;
  color: var(--checka-ink);
}
.hero-title em { font-style: italic; font-weight: 600; }
.hero-title .amber { color: var(--checka-amber); }

.hero-lead {
  font-size: 1.1875rem;
  line-height: 1.55;
  color: var(--checka-graphite);
  margin: 0 auto 2rem;
  max-width: 38ch;
}

.hero-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.hero-meta {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--checka-mist);
  margin: 0;
}

/* === STATS GRID (Por que existimos) === */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
  margin: 2rem 0 0;
}
.stat {
  padding: 0.5rem 0;
  border-top: 2px solid var(--checka-ink);
}
.stat-number {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(3rem, 6vw, 4.5rem);
  line-height: 1;
  letter-spacing: -0.03em;
  margin: 1rem 0 0.5rem;
  color: var(--checka-ink);
}
.stat-unit {
  font-size: 0.55em;
  color: var(--checka-amber);
  vertical-align: super;
  font-weight: 700;
}
.stat-label {
  font-size: 1rem;
  line-height: 1.5;
  color: var(--checka-ink);
  margin: 0 0 0.75rem;
}
.stat-source {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--checka-mist);
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* === STEPS (Como funciona) === */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
  counter-reset: step-counter;
}
.step {
  padding: 2rem;
  background: var(--checka-paper);
  border: 1px solid var(--border-soft);
  border-radius: 18px;
  position: relative;
  transition: border-color 0.2s, transform 0.2s;
}
.step:hover {
  border-color: var(--checka-amber);
  transform: translateY(-2px);
}
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--checka-ink);
  color: var(--checka-amber);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 1.25rem;
}
.step h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.25rem;
  margin: 0 0 0.6rem;
  letter-spacing: -0.01em;
}
.step p {
  font-size: 0.9375rem;
  color: var(--checka-graphite);
  margin: 0;
  line-height: 1.6;
}

/* === Verdict mock (caixa de exemplo de resposta) === */
.verdict-mock {
  margin: 3rem auto 0;
  max-width: 480px;
  padding: 1.5rem 1.75rem;
  background: var(--checka-ink);
  color: var(--checka-paper);
  border-radius: 18px;
  font-size: 0.95rem;
  line-height: 1.55;
  text-align: left;
  box-shadow: var(--shadow-medium);
}
.verdict-head {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  letter-spacing: 0.04em;
  margin: 0 0 0.25rem;
  color: var(--checka-true);
}
.verdict-icon { font-size: 1rem; margin-right: 0.4rem; }
.verdict-confidence {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--checka-mist);
  margin: 0 0 1rem;
}
.verdict-body { margin: 0 0 0.75rem; }
.verdict-summary { color: rgba(250, 250, 247, 0.85); }
.verdict-foot {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--checka-mist);
  margin: 1.25rem 0 0;
  padding-top: 1rem;
  border-top: 1px solid var(--border-soft-invert);
}
.checka-mark {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.02em;
}

/* === PLANS (pricing previsto) === */
.plans {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  margin: 2rem 0;
}
.plan {
  padding: 2rem 1.75rem;
  background: var(--checka-paper);
  border: 1px solid var(--border-soft);
  border-radius: 18px;
  position: relative;
  display: flex;
  flex-direction: column;
}
.plan--featured {
  border-color: var(--checka-amber);
  background: #fff;
  box-shadow: var(--shadow-soft);
}
.plan-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--checka-amber);
  color: var(--checka-ink);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: lowercase;
  letter-spacing: 0.04em;
  padding: 0.3rem 0.95rem;
  border-radius: 999px;
  white-space: nowrap;
  box-shadow: 0 2px 8px rgba(197, 141, 63, 0.35);
}
.plan-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  text-transform: lowercase;
  letter-spacing: 0.02em;
  color: var(--checka-graphite);
  margin: 0 0 0.5rem;
}
.plan-price {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 2.5rem;
  line-height: 1;
  color: var(--checka-ink);
  margin: 0 0 0.25rem;
  letter-spacing: -0.02em;
}
.plan-period {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 0.875rem;
  color: var(--checka-mist);
}
.plan-pitch {
  font-size: 0.9375rem;
  color: var(--checka-graphite);
  margin: 0.5rem 0 1.5rem;
  font-style: italic;
}
.plan-features {
  margin: 0 0 1.5rem;
  flex-grow: 1;
}
.plan-features li {
  padding: 0.4rem 0;
  font-size: 0.9375rem;
  color: var(--checka-graphite);
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
}
.plan-features li::before {
  content: "→";
  color: var(--checka-amber);
  font-weight: 700;
  flex-shrink: 0;
}

/* === B2B === */
.b2b-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin: 2rem 0;
}
.b2b-card {
  padding: 1.75rem;
  background: rgba(250, 250, 247, 0.04);
  border: 1px solid var(--border-soft-invert);
  border-radius: 16px;
  transition: border-color 0.2s, background 0.2s;
}
.b2b-card:hover {
  border-color: var(--checka-amber);
  background: rgba(197, 141, 63, 0.06);
}
.b2b-icon { font-size: 1.75rem; margin-bottom: 0.85rem; }
.b2b-card h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.125rem;
  margin: 0 0 0.5rem;
  color: var(--checka-paper);
  letter-spacing: -0.01em;
}
.b2b-card p {
  font-size: 0.9375rem;
  line-height: 1.55;
  color: rgba(250, 250, 247, 0.72);
  margin: 0;
}

.b2b-cta {
  margin-top: 3rem;
  padding: 2.5rem;
  background: var(--checka-paper);
  color: var(--checka-ink);
  border-radius: 20px;
  text-align: center;
}
.b2b-cta h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.5rem, 3vw, 2rem);
  letter-spacing: -0.02em;
  margin: 0 0 0.75rem;
}
.b2b-cta p {
  font-size: 1.0625rem;
  color: var(--checka-graphite);
  margin: 0 0 1.5rem;
  max-width: 50ch;
  margin-left: auto;
  margin-right: auto;
}
.b2b-meta {
  font-family: var(--font-mono);
  font-size: 0.8125rem !important;
  color: var(--checka-mist) !important;
  margin: 1.25rem 0 0 !important;
}

/* === TESTIMONIALS === */
.testimonials {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0 0;
}
.test {
  margin: 0;
  padding: 1.75rem;
  background: var(--checka-paper);
  border: 1px solid var(--border-soft);
  border-radius: 18px;
  border-left: 3px solid var(--checka-amber);
}
.test-quote {
  font-family: var(--font-display);
  font-weight: 500;
  font-style: italic;
  font-size: 1.0625rem;
  line-height: 1.55;
  color: var(--checka-ink);
  margin: 0 0 1.25rem;
  padding: 0;
  border: none;
}
.test-author {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  font-family: var(--font-body);
}
.test-name {
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--checka-ink);
}
.test-role {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--checka-mist);
  letter-spacing: 0.02em;
}

/* === FAQ === */
.faq-list {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.faq-item {
  background: #fff;
  border: 1px solid var(--border-soft);
  border-radius: 14px;
  overflow: hidden;
  transition: border-color 0.2s;
}
.faq-item:hover { border-color: var(--checka-amber); }
.faq-q {
  width: 100%;
  background: transparent;
  border: none;
  padding: 1.15rem 1.5rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1rem;
  color: var(--checka-ink);
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.faq-icon {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.4rem;
  color: var(--checka-amber);
  transition: transform 0.2s ease;
  flex-shrink: 0;
}
.faq-item[aria-expanded="true"] .faq-icon,
.faq-item.is-open .faq-icon { transform: rotate(45deg); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.2s ease;
  padding: 0 1.5rem;
}
.faq-item.is-open .faq-a {
  max-height: 600px;
  padding: 0 1.5rem 1.25rem;
}
.faq-a p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--checka-graphite);
}
.faq-a a { color: var(--color-amber-hover); text-decoration: underline; text-underline-offset: 3px; }

/* === WAITLIST === */
.waitlist-block { text-align: center; }
.waitlist-block .section-title { margin-left: auto; margin-right: auto; max-width: 18ch; }
.waitlist-block .section-sub { margin-left: auto; margin-right: auto; }

.waitlist-form {
  margin: 2rem auto 0;
  max-width: 560px;
  background: var(--checka-paper);
  border-radius: 16px;
  overflow: hidden;
  min-height: 320px;
}
.waitlist-form iframe { display:none; }
.wl-form { display:flex; flex-direction:column; gap:14px; padding:28px; }
.wl-row { display:grid; grid-template-columns:1fr 1fr; gap:12px; }
.wl-form input { width:100%; padding:13px 16px; border:1px solid rgba(255,255,255,.12); border-radius:10px; background:rgba(255,255,255,.06); color:#fff; font:15px Inter,sans-serif; outline:none; transition:border-color .15s; }
.wl-form input:focus { border-color:#FFC300; }
.wl-form input::placeholder { color:rgba(255,255,255,.35); }
.wl-btn { width:100%; justify-content:center; }
.wl-success { padding:28px; text-align:center; font-size:17px; color:#fff; line-height:1.55; }
@media(max-width:520px){ .wl-row { grid-template-columns:1fr; } }
.waitlist-fallback {
  margin: 1.25rem auto 0;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: rgba(250, 250, 247, 0.55);
}
.waitlist-fallback a {
  color: var(--checka-amber);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* === FOOTER === */
.site-footer {
  background: var(--checka-paper);
  padding: clamp(3rem, 6vw, 4.5rem) 0 2rem;
  border-top: 1px solid var(--border-soft);
}
.footer-top {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}
@media (min-width: 720px) {
  .footer-top { grid-template-columns: 1fr 2fr; gap: 3rem; }
}

.footer-brand { display: flex; flex-direction: column; gap: 1rem; }
.footer-mark { height: 24px; width: auto; }
.footer-tagline {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 500;
  color: var(--checka-graphite);
  margin: 0;
  font-size: 0.9375rem;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1.5rem;
}
.footer-col { display: flex; flex-direction: column; gap: 0.5rem; }
.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--checka-graphite);
  font-weight: 500;
  margin: 0 0 0.5rem;
}
.footer-col a {
  font-size: 0.9375rem;
  color: var(--checka-ink);
  text-decoration: none;
  transition: color 0.15s;
}
.footer-col a:hover { color: var(--checka-amber); }

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--border-soft);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--checka-graphite);
}
.footer-attribution { margin: 0; }
.footer-attribution a {
  color: var(--checka-ink);
  font-weight: 500;
  border-bottom: 1px solid var(--checka-amber);
}
.footer-attribution a:hover { color: var(--checka-amber); }
.footer-legal {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--checka-mist);
}
.footer-legal a { color: var(--checka-mist); }
.footer-disabled { opacity: 0.6; cursor: not-allowed; }

/* === Responsivo === */
@media (max-width: 820px) {
  .menu-toggle { display: flex; }

  .nav-links {
    position: absolute;
    top: 68px;
    left: 0;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--checka-paper);
    border-bottom: 1px solid var(--border-soft);
    padding: 1rem var(--pad-x);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.2s, opacity 0.2s;
  }
  .nav-links a {
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--border-soft);
    text-align: left;
  }
  .nav-links .status-badge {
    margin: 0.85rem 0;
    align-self: flex-start;
  }
  .nav-links .nav-cta {
    margin-top: 0.85rem;
    text-align: center;
  }
  .nav-links.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
}

@media (max-width: 540px) {
  .hero-title { font-size: clamp(2rem, 9vw, 2.75rem); }
  .hero-lead { font-size: 1.05rem; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }
  .b2b-cta { padding: 2rem 1.5rem; }
  .stat-number { font-size: 3rem; }
  .verdict-mock { padding: 1.25rem; font-size: 0.875rem; }
}

/* === Modo escuro automático === */
@media (prefers-color-scheme: dark) {
  body {
    background: var(--checka-ink);
    color: var(--checka-paper);
  }

  a { color: var(--checka-paper); }

  .site-nav {
    background: rgba(10, 10, 11, 0.92);
    border-bottom-color: var(--border-soft-invert);
  }
  .nav-links a { color: rgba(250, 250, 247, 0.78); }
  .nav-links a:hover { color: var(--checka-paper); }
  .brand-mark--light { display: none; }
  .brand-mark--dark { display: block; }
  .menu-toggle span { background: var(--checka-paper); }

  .hero { background: radial-gradient(ellipse 80% 60% at 50% 30%, rgba(197, 141, 63, 0.08) 0%, transparent 70%), var(--checka-ink); }
  .hero-title { color: var(--checka-paper); }
  .hero-lead { color: rgba(250, 250, 247, 0.78); }

  .section--paper {
    background: #111114;
    border-top-color: var(--border-soft-invert);
  }

  .section-title { color: var(--checka-paper); }
  .section-sub, .section-foot { color: rgba(250, 250, 247, 0.72); }
  .stat { border-top-color: var(--checka-paper); }
  .stat-number, .stat-label { color: var(--checka-paper); }

  .step, .plan, .test, .faq-item {
    background: #18181c;
    border-color: var(--border-soft-invert);
  }
  .step h3, .test-quote, .test-name { color: var(--checka-paper); }
  .step p, .plan-pitch, .plan-features li, .faq-a p { color: rgba(250, 250, 247, 0.72); }
  .step-num { background: var(--checka-amber); color: var(--checka-ink); }
  .plan--featured { background: #1f1f24; }
  .plan-price { color: var(--checka-paper); }
  .faq-q { color: var(--checka-paper); }

  .b2b-cta {
    background: #111114;
    color: var(--checka-paper);
  }
  .b2b-cta h3 { color: var(--checka-paper); }
  .b2b-cta p { color: rgba(250, 250, 247, 0.78); }

  .waitlist-form { background: #18181c; }

  .site-footer {
    background: var(--checka-ink);
    border-top-color: var(--border-soft-invert);
  }
  .brand-mark.footer-mark { content: url("images/logo-wordmark-invertido.svg"); }
  .footer-tagline { color: rgba(250, 250, 247, 0.72); }
  .footer-col h4 { color: rgba(250, 250, 247, 0.55); }
  .footer-col a { color: var(--checka-paper); }
  .footer-bottom { border-top-color: var(--border-soft-invert); color: rgba(250, 250, 247, 0.72); }
  .footer-attribution a { color: var(--checka-paper); }

  .btn--ghost {
    color: var(--checka-paper);
    border-color: var(--border-soft-invert);
  }
  .btn--ghost:hover { border-color: var(--checka-paper); }
  .btn--primary {
    background: var(--checka-paper);
    color: var(--checka-ink);
  }
  .btn--primary:hover { background: #fff; }

  .status-badge { color: rgba(250, 250, 247, 0.72); border-color: var(--border-soft-invert); }
}