/* =========================================================
   Next Squad — Stylesheet
   Brand: cor primária #2e22fe.

   Estrutura:
   1. Tokens
   2. Reset / base
   3. Tipografia (eyebrow, display, prose)
   4. Container, navbar (+ menu mobile), footer
   5. Botões
   6. Hero (centralizado, type-only)
   7. Cards de valor (problema, etapa 1, entrega)
   8. Escada (ladder / acordeão)
   9. About (bignums)
   10. CTA final + contacts
   11. Reveal
   12. Responsivo
   ========================================================= */

/* 1. Tokens */
:root {
  --color-bg: #FAFAF9;
  --color-bg-soft: #F3F2EE;
  --color-bg-card: #FFFFFF;
  --color-fg: #0A0A0A;
  --color-fg-muted: #6B6B6B;
  --color-fg-dim: #A1A1A1;
  --color-border: #E5E3DE;
  --color-border-strong: #D4D2CC;
  --color-brand: #2e22fe;
  --color-brand-hover: #1f15d6;
  --color-brand-soft: rgba(46, 34, 254, 0.08);

  --container-max: 1200px;
  --container-pad: 1.25rem;
  --section-pad-y: clamp(5rem, 9vw, 8rem);
  --navbar-h: 5rem;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 999px;

  --font-sans: 'Geist', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'Geist Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --duration-fast: 160ms;
  --duration-base: 280ms;

  --shadow-card: 0 1px 1px rgba(10, 10, 10, 0.03), 0 4px 12px rgba(10, 10, 10, 0.02);
  --shadow-card-hover: 0 1px 2px rgba(10, 10, 10, 0.05), 0 10px 30px rgba(10, 10, 10, 0.05);
  --shadow-brand: 0 1px 2px rgba(46, 34, 254, 0.2), 0 10px 30px rgba(46, 34, 254, 0.1);
}

/* 2. Reset */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-fg);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

::selection { background: var(--color-brand); color: #fff; }

img, svg { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }

:focus-visible {
  outline: 2px solid var(--color-brand);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

h1, h2, h3, h4, p, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }
sup { font-size: 0.45em; vertical-align: super; font-weight: 500; }

/* 3. Tipografia */
em {
  font-style: normal;
  color: var(--color-brand);
}

.prose {
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--color-fg-muted);
  max-width: 38rem;
  text-wrap: pretty;
}
.prose--lg {
  font-size: 1.1875rem;
  line-height: 1.6;
  max-width: 52rem;
  margin-top: 1.5rem;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-fg-muted);
  margin-bottom: 1.5rem;
}
.eyebrow--centered { justify-content: center; }
.eyebrow__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.625rem;
  height: 1.625rem;
  padding-inline: 0.375rem;
  background: var(--color-brand-soft);
  color: var(--color-brand);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
}

.display {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 1.05;
  color: var(--color-fg);
  text-wrap: balance;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--color-fg);
  color: var(--color-bg);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  z-index: 1000;
  font-weight: 500;
}
.skip-link:focus { top: 1rem; }

/* 4. Container, navbar, footer */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color var(--duration-base) var(--ease-out),
              border-color var(--duration-base) var(--ease-out),
              backdrop-filter var(--duration-base) var(--ease-out);
}
.navbar[data-elevated="true"] {
  background: rgba(250, 250, 249, 0.85);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom-color: var(--color-border);
}
.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: var(--navbar-h);
}
.navbar__brand { display: flex; align-items: center; }
.navbar__logo {
  height: 2.5rem;
  width: auto;
}
.navbar__nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}
.navbar__link {
  font-size: 0.9375rem;
  color: var(--color-fg-muted);
  font-weight: 500;
  transition: color var(--duration-fast) var(--ease-out);
  display: none;
}
.navbar__link:hover { color: var(--color-fg); }

/* CTA da navbar: texto curto no mobile, completo a partir de 480px */
.navbar__cta-full { display: none; }
.navbar__cta-short { display: inline; }
@media (min-width: 480px) {
  .navbar__cta-full { display: inline; }
  .navbar__cta-short { display: none; }
}

/* Hamburger — visível só em mobile (< 768px) */
.navbar__toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0.5rem;
  border-radius: var(--radius-md);
  background: transparent;
  border: 1px solid var(--color-border);
}
.navbar__toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-fg);
  border-radius: 2px;
  transition: transform var(--duration-base) var(--ease-out), opacity var(--duration-base) var(--ease-out);
}
.navbar__toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.navbar__toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.navbar__toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Menu mobile (dropdown) */
.navbar__mobile {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.5rem var(--container-pad) 1.25rem;
  border-top: 1px solid var(--color-border);
  background: rgba(250, 250, 249, 0.96);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
}
.navbar__mobile[hidden] { display: none; }
.navbar__mobile a:not(.btn) {
  padding: 0.85rem 0.25rem;
  color: var(--color-fg);
  font-weight: 500;
  border-bottom: 1px solid var(--color-border);
}
.navbar__mobile a:not(.btn):last-of-type { border-bottom: none; }
.navbar__mobile-cta { margin-top: 0.75rem; justify-content: center; }

/* CTA "Pedir demonstração" da barra fica no menu mobile; some na barra < 768px */
.navbar__nav .navbar__cta { display: none; }

@media (min-width: 768px) {
  .navbar__toggle { display: none; }
  .navbar__mobile { display: none !important; }
  .navbar__nav .navbar__cta { display: inline-flex; }
}

/* Footer — simples: marca à esquerda, links + copyright à direita */
.footer {
  border-top: 1px solid var(--color-border);
  padding-block: 2.5rem;
  background: var(--color-bg);
}
.footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem 2rem;
}
.footer__brand { display: inline-flex; }
.footer__brand img { height: 1.75rem; width: auto; }
.footer__links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.875rem;
}
.footer__link { color: var(--color-fg-muted); transition: color var(--duration-fast) var(--ease-out); }
.footer__link:hover { color: var(--color-brand); }
.footer__copy { color: var(--color-fg-dim); font-size: 0.8125rem; }

/* 5. Botões */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  height: 2.625rem;
  padding-inline: 1.125rem;
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: 0.9375rem;
  letter-spacing: -0.005em;
  white-space: nowrap;
  border: 1px solid transparent;
  transition: background-color var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-base) var(--ease-out);
  user-select: none;
}
.btn:active { transform: translateY(1px); }
.btn--sm { height: 2.25rem; padding-inline: 0.875rem; font-size: 0.875rem; }
.btn--lg { height: 3.25rem; padding-inline: 1.5rem; font-size: 1rem; }

.btn--primary {
  background: var(--color-brand);
  color: #fff;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.15), 0 1px 2px rgba(46, 34, 254, 0.25);
}
.btn--primary:hover {
  background: var(--color-brand-hover);
  box-shadow: var(--shadow-brand);
  transform: translateY(-1px);
}

.btn--ghost {
  background: transparent;
  color: var(--color-fg);
  border-color: var(--color-border-strong);
}
.btn--ghost:hover {
  border-color: var(--color-fg);
  background: rgba(10, 10, 10, 0.02);
}

.btn__arrow {
  width: 0.875rem;
  height: 0.875rem;
  transition: transform var(--duration-base) var(--ease-out);
}
.btn:hover .btn__arrow { transform: translateX(3px); }

/* Section base */
.section {
  position: relative;
  padding-block: var(--section-pad-y);
}
.section--bordered { border-top: 1px solid var(--color-border); }

/* ========================================================
   6. Hero — centralizado, type-only
   ======================================================== */
.hero {
  position: relative;
  padding-block: clamp(5rem, 11vw, 8rem) clamp(4rem, 8vw, 6rem);
  overflow: hidden;
  min-height: calc(100vh - var(--navbar-h));
  min-height: calc(100dvh - var(--navbar-h));
  display: flex;
  align-items: center;
}
.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}
.hero__orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
}
.hero__orb--1 {
  top: -20%;
  right: -10%;
  width: 60vw;
  height: 60vw;
  max-width: 800px;
  max-height: 800px;
  background: radial-gradient(closest-side, rgba(46, 34, 254, 0.2), transparent 70%);
}
.hero__orb--2 {
  bottom: -30%;
  left: -10%;
  width: 50vw;
  height: 50vw;
  max-width: 700px;
  max-height: 700px;
  background: radial-gradient(closest-side, rgba(46, 34, 254, 0.08), transparent 70%);
}
.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(10, 10, 10, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10, 10, 10, 0.035) 1px, transparent 1px);
  background-size: 88px 88px;
  background-position: center center;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, #000 30%, transparent 80%);
}

.hero__inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  width: 100%;
}

.hero__title {
  font-size: clamp(2.25rem, 0.9rem + 5.6vw, 5.5rem);
  font-weight: 600;
  letter-spacing: -0.045em;
  line-height: 1.02;
  color: var(--color-fg);
  margin-bottom: 1.25rem;
  max-width: 20ch;
  text-wrap: balance;
  overflow-wrap: break-word;
}

.hero__lead {
  font-size: clamp(1rem, 1.3vw, 1.125rem);
  line-height: 1.65;
  color: var(--color-fg-muted);
  max-width: 36rem;
  margin-bottom: 2.5rem;
  text-wrap: pretty;
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

/* ========================================================
   Section head unificado — eyebrow + display + prose
   ======================================================== */
.section-head {
  max-width: 60rem;
  margin-bottom: 4rem;
}

/* ========================================================
   9. Value — Manifesto integrado + 3 pilares
   ======================================================== */
.value-section { background: var(--color-bg-soft); }
.value-section__inner {
  text-align: center;
  max-width: 72rem;
  margin: 0 auto;
}

.value__title {
  font-size: clamp(2.5rem, 6.5vw, 5rem);
  font-weight: 600;
  letter-spacing: -0.05em;
  line-height: 1.02;
  margin-block: 2rem 2.5rem;
  max-width: 22ch;
  margin-inline: auto;
  text-wrap: balance;
}

.value__manifesto {
  font-size: clamp(1.125rem, 1.6vw, 1.375rem);
  line-height: 1.55;
  color: var(--color-fg);
  max-width: 48rem;
  margin: 0 auto 5rem;
  text-wrap: pretty;
}

.value__cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  text-align: left;
  max-width: 64rem;
  margin: 0 auto;
}
/* Variante com 4 cards em 2x2 (ponto de partida, etapa 1) */
.problem__cards,
.cards--2up {
  margin: 3rem 0 0;
  max-width: none;
}
/* Grid de cards com respiro acima do header da seção */
.cards--spaced { margin-top: 3rem; }
.value-card {
  padding: 1.75rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--duration-base) var(--ease-out),
              box-shadow var(--duration-base) var(--ease-out),
              transform var(--duration-base) var(--ease-out);
  box-shadow: var(--shadow-card);
}
.value-card:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}
.value-card__icon {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius-md);
  background: var(--color-brand-soft);
  color: var(--color-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}
.value-card__icon svg { width: 1.25rem; height: 1.25rem; }
.value-card__title {
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  margin-bottom: 0.5rem;
}
.value-card__text {
  font-size: 0.9375rem;
  color: var(--color-fg-muted);
  line-height: 1.55;
}

/* ========================================================
   10. About — Bignums
   ======================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.bignum {
  padding: 3rem 0;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.bignum + .bignum { border-top: 1px solid var(--color-border); }
.bignum__value {
  font-size: clamp(5rem, 11vw, 9rem);
  font-weight: 500;
  letter-spacing: -0.07em;
  line-height: 0.85;
  color: var(--color-fg);
  display: flex;
  align-items: baseline;
  gap: 0.125rem;
}
.bignum__value sup {
  color: var(--color-brand);
  font-weight: 500;
}
.bignum--text .bignum__value {
  font-size: clamp(2.5rem, 5.5vw, 4rem);
  letter-spacing: -0.04em;
  line-height: 1;
  font-weight: 600;
}
.bignum__bold { font-weight: 600; }
.bignum__plus {
  color: var(--color-fg-muted);
  font-weight: 500;
}
.bignum__label {
  font-size: 0.9375rem;
  color: var(--color-fg-muted);
  line-height: 1.5;
}

/* ========================================================
   12. CTA Final
   ======================================================== */
.section--cta {
  position: relative;
  padding-block: clamp(5rem, 11vw, 9rem);
  overflow: hidden;
  text-align: center;
}
.cta__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}
.cta__watermark {
  position: absolute;
  top: 50%;
  left: 50%;
  width: clamp(400px, 50vw, 800px);
  height: auto;
  transform: translate(-50%, -50%);
  opacity: 0.05;
}
.cta__orb {
  position: absolute;
  top: 30%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 60vw;
  height: 60vw;
  max-width: 700px;
  max-height: 700px;
  filter: blur(80px);
  background: radial-gradient(closest-side, rgba(46, 34, 254, 0.15), transparent 70%);
}

.cta {
  position: relative;
  z-index: 1;
  max-width: 44rem;
  margin: 0 auto;
}
.cta__title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 600;
  letter-spacing: -0.045em;
  line-height: 1.02;
  margin-bottom: 1.25rem;
  text-wrap: balance;
}
.cta__lead {
  font-size: 1.1875rem;
  color: var(--color-fg-muted);
  line-height: 1.6;
  max-width: 36rem;
  margin: 0 auto 3.5rem;
  text-wrap: pretty;
}

/* ========================================================
   Contacts — cards de canal grandes e visuais
   ======================================================== */
.contacts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  max-width: 56rem;
  margin: 0 auto;
}
.contact {
  --c-accent: var(--color-brand);
  --c-accent-soft: var(--color-brand-soft);
  position: relative;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 1.75rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-align: left;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: border-color var(--duration-base) var(--ease-out),
              box-shadow var(--duration-base) var(--ease-out),
              transform var(--duration-base) var(--ease-out);
}
.contact::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top right, var(--c-accent-soft), transparent 60%);
  opacity: 0;
  transition: opacity var(--duration-base) var(--ease-out);
  pointer-events: none;
}
.contact:hover {
  border-color: var(--c-accent);
  box-shadow: 0 1px 2px rgba(10, 10, 10, 0.04), 0 12px 32px rgba(10, 10, 10, 0.06);
  transform: translateY(-2px);
}
.contact:hover::before { opacity: 1; }

.contact--whatsapp {
  --c-accent: #25D366;
  --c-accent-soft: rgba(37, 211, 102, 0.1);
}

.contact__icon {
  position: relative;
  width: 3.25rem;
  height: 3.25rem;
  flex-shrink: 0;
  border-radius: var(--radius-md);
  background: var(--c-accent-soft);
  color: var(--c-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--duration-base) var(--ease-out),
              color var(--duration-base) var(--ease-out);
}
.contact__icon svg { width: 1.5rem; height: 1.5rem; }
.contact:hover .contact__icon {
  background: var(--c-accent);
  color: #fff;
}

.contact__body {
  position: relative;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  min-width: 0;
}
.contact__label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-fg-muted);
}
.contact__value {
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--color-fg);
  overflow-wrap: anywhere;
}
.contact__hint {
  font-size: 0.8125rem;
  color: var(--color-fg-muted);
  margin-top: 0.125rem;
}

.contact__cta {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  flex-shrink: 0;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--c-accent);
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-full);
  background: var(--c-accent-soft);
  transition: background-color var(--duration-base) var(--ease-out),
              color var(--duration-base) var(--ease-out),
              transform var(--duration-base) var(--ease-out);
}
.contact__cta svg { transition: transform var(--duration-base) var(--ease-out); }
.contact:hover .contact__cta {
  background: var(--c-accent);
  color: #fff;
}
.contact:hover .contact__cta svg { transform: translateX(3px); }

@media (max-width: 640px) {
  .contact { padding: 1.25rem; gap: 1rem; }
  .contact__icon { width: 2.75rem; height: 2.75rem; }
  .contact__icon svg { width: 1.25rem; height: 1.25rem; }
  .contact__value { font-size: 1rem; }
  .contact__cta { display: none; }
}

@media (max-width: 600px) {
  .ladder__head { padding: 1.25rem 1.25rem; gap: 1rem; }
  .ladder__num { width: 2.25rem; height: 2.25rem; font-size: 0.8125rem; }
  .ladder__body { padding: 0 1.25rem 1.5rem 1.25rem; }
}

/* ========================================================
   12b. Ladder — As 5 etapas (acordeão vertical)
   Reaproveita a linguagem dos cards, com degrau ativo
   destacado e corpo expansível.
   ======================================================== */
.ladder {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.ladder__step {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: border-color var(--duration-base) var(--ease-out),
              box-shadow var(--duration-base) var(--ease-out);
}
.ladder__step:hover { border-color: var(--color-border-strong); }
.ladder__step--active {
  border-color: var(--color-brand);
  box-shadow: 0 1px 2px rgba(46, 34, 254, 0.12), 0 12px 32px rgba(46, 34, 254, 0.08);
}
.ladder__head {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 1.5rem 1.75rem;
  background: none;
  border: none;
  text-align: left;
}
.ladder__num {
  flex-shrink: 0;
  width: 2.75rem;
  height: 2.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--color-brand-soft);
  color: var(--color-brand);
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  font-weight: 500;
  transition: background-color var(--duration-base) var(--ease-out),
              color var(--duration-base) var(--ease-out);
}
.ladder__step--active .ladder__num { background: var(--color-brand); color: #fff; }
.ladder__titles { flex: 1; min-width: 0; }
.ladder__title {
  font-size: clamp(1.1875rem, 2.4vw, 1.5rem);
  font-weight: 600;
  letter-spacing: -0.025em;
  color: var(--color-fg);
}
.ladder__chev {
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
  color: var(--color-fg-muted);
  transition: transform var(--duration-base) var(--ease-out);
}
.ladder__head[aria-expanded="true"] .ladder__chev { transform: rotate(180deg); }
.ladder__body {
  padding: 0 1.75rem 1.75rem calc(1.75rem + 2.75rem + 1.25rem);
}
.ladder__body p {
  color: var(--color-fg-muted);
  font-size: 1rem;
  line-height: 1.7;
  max-width: 60rem;
}
.ladder__note {
  margin-top: 2.5rem;
  font-size: clamp(1.125rem, 1.6vw, 1.375rem);
  line-height: 1.55;
  color: var(--color-fg);
  text-align: center;
  max-width: 44rem;
  margin-inline: auto;
  text-wrap: pretty;
}

/* ========================================================
   13. Reveal
   ======================================================== */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 800ms var(--ease-out), transform 800ms var(--ease-out);
  will-change: opacity, transform;
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}
.reveal[data-delay="0"] { transition-delay: 0ms; }
.reveal[data-delay="1"] { transition-delay: 80ms; }
.reveal[data-delay="2"] { transition-delay: 160ms; }
.reveal[data-delay="3"] { transition-delay: 240ms; }
.reveal[data-delay="4"] { transition-delay: 320ms; }

/* ========================================================
   14. Responsivo
   ======================================================== */
@media (min-width: 640px) {
  :root { --container-pad: 2rem; }
  .navbar__logo { height: 2.75rem; }
}

@media (min-width: 768px) {
  .navbar__link { display: inline-flex; }

  .value__cards { grid-template-columns: repeat(3, 1fr); }
  .problem__cards,
  .cards--2up { grid-template-columns: repeat(2, 1fr); }

  .about-grid {
    grid-template-columns: repeat(3, 1fr);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
  }
  .bignum {
    padding: 4rem 2.5rem;
    border-left: 1px solid var(--color-border);
  }
  .bignum:first-child { border-left: none; padding-left: 0; }
  .bignum:last-child { padding-right: 0; }
  .bignum + .bignum { border-top: none; }
}

@media (min-width: 960px) {
  :root { --container-pad: 2.5rem; }
}

@media (min-width: 1280px) {
  :root { --container-pad: 3rem; }
}