/* ================================================================
   JOÃO VICTOR SERPA: style.css
   Landing page completa: reset, design tokens, tipografia, grid,
   botões, cards, header, hero, áreas de atuação, timeline, sobre,
   institucional, FAQ, CTA final, rodapé, CTA flutuante mobile e
   animações de revelação (fade up / fade in / hover / scroll reveal).
   Mobile-first: regras base = mobile; media queries elevam para
   telas maiores (min-width).
================================================================ */


/* ================================================================
   1. RESET MODERNO
================================================================ */
*, *::before, *::after { box-sizing: border-box; }

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

body, h1, h2, h3, h4, p, figure, blockquote, dl, dd, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }
html, body { height: 100%; }

body {
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}


/* ================================================================
   2. DESIGN TOKENS: Design System v2.0
================================================================ */
:root {
  --color-primary: #1F5E3B;
  --color-primary-dark: #17462D;
  --color-secondary: #163A70;
  --color-accent: #C8A04D;
  --color-accent-dark: #B08F42;
  --color-background: #FAFAF8;
  --color-text: #2F2F2F;
  --color-text-muted: #5B5B57;
  --color-gray: #ECECEC;
  --color-on-dark: #F3F1EA;
  --color-on-dark-muted: rgba(243, 241, 234, 0.72);

  --font-display: "Merriweather", Georgia, serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --text-h1: clamp(2rem, 1.4rem + 2.6vw, 3.5rem);
  --text-h2: clamp(1.625rem, 1.35rem + 1.2vw, 2.25rem);
  --text-h3: clamp(1.25rem, 1.15rem + 0.4vw, 1.5rem);
  --text-body: 1.0625rem;
  --text-small: 0.875rem;

  --leading-tight: 1.2;
  --leading-snug: 1.35;
  --leading-body: 1.7;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;
  --space-32: 8rem;

  --container-max: 1280px;
  --container-padding: 1.5rem;
  --grid-gutter: 1rem;

  --radius-btn: 16px;
  --radius-card: 18px;
  --radius-sm: 10px;

  --shadow-xs: 0 1px 2px rgba(31, 41, 33, 0.04);
  --shadow-sm: 0 2px 8px rgba(31, 41, 33, 0.06);
  --shadow-md: 0 4px 20px rgba(31, 41, 33, 0.08);
  --shadow-card: 0 4px 20px rgba(31, 41, 33, 0.04);

  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
  --reveal-duration: 600ms;

  --header-height: 76px;
}

@media (min-width: 768px) {
  :root {
    --container-padding: 3rem;
    --grid-gutter: 1.5rem;
  }
}

@media (min-width: 1024px) {
  :root {
    --container-padding: 6rem;
    --header-height: 88px;
  }
}


/* ================================================================
   3. TIPOGRAFIA BASE
================================================================ */
body {
  font-family: var(--font-body);
  font-size: var(--text-body);
  font-weight: 400;
  color: var(--color-text);
  background-color: var(--color-background);
  line-height: var(--leading-body);
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-text);
  line-height: var(--leading-tight);
}

h1 { font-size: var(--text-h1); }
h2 { font-size: var(--text-h2); }
h3 { font-size: var(--text-h3); font-weight: 400; line-height: var(--leading-snug); }

.eyebrow {
  font-family: var(--font-body);
  font-size: var(--text-small);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.section__header {
  max-width: 640px;
  margin-bottom: var(--space-12);
}

.section__title { margin-bottom: var(--space-4); }

.section__subtitle {
  color: var(--color-text-muted);
  font-size: 1.0625rem;
}


/* ================================================================
   4. GRID / CONTAINER / UTILITÁRIOS
================================================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.section { padding-block: var(--space-16); }

@media (min-width: 1024px) {
  .section { padding-block: var(--space-24); }
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.icon { flex-shrink: 0; }

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: 1000;
  padding: var(--space-3) var(--space-6);
  background: var(--color-primary);
  color: var(--color-on-dark);
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: top var(--transition-base);
}

.skip-link:focus-visible { top: var(--space-4); }

a:focus-visible, button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.header-sentinel {
  position: absolute;
  top: 0; left: 0;
  width: 1px; height: 1px;
  pointer-events: none;
}


/* ================================================================
   5. SISTEMA DE BOTÕES
================================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  height: 56px;
  padding-inline: var(--space-8);
  border-radius: var(--radius-btn);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1rem;
  white-space: nowrap;
  border: 1.5px solid transparent;
  transition: transform var(--transition-base), box-shadow var(--transition-base),
              background-color var(--transition-base), border-color var(--transition-base),
              color var(--transition-base);
}

.btn--primary {
  background-color: var(--color-accent);
  color: var(--color-primary-dark);
  box-shadow: var(--shadow-sm);
}

.btn--primary:hover {
  background-color: var(--color-accent-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn--primary:active { transform: translateY(0); }

.btn--outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn--outline:hover {
  background-color: var(--color-primary);
  color: var(--color-on-dark);
  transform: translateY(-2px);
}

.btn--ghost {
  background-color: transparent;
  color: var(--color-on-dark);
  border-color: rgba(243, 241, 234, 0.35);
}

.btn--ghost:hover {
  border-color: var(--color-on-dark);
  transform: translateY(-2px);
}

.btn--large { height: 56px; padding-inline: var(--space-8); }

.btn--nav {
  height: 44px;
  padding-inline: var(--space-6);
  font-size: var(--text-small);
}

.btn:disabled, .btn[aria-disabled="true"] {
  opacity: 0.5;
  pointer-events: none;
  box-shadow: none;
  transform: none;
}


/* ================================================================
   6. CARDS
================================================================ */
.card {
  background-color: var(--color-background);
  border: 1px solid rgba(47, 47, 47, 0.08);
  border-radius: var(--radius-card);
  padding: var(--space-8);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.card__icon { color: var(--color-accent); margin-bottom: var(--space-4); }
.card__title { margin-bottom: var(--space-2); }
.card__text { color: var(--color-text-muted); }

.cards-grid {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .cards-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .cards-grid { grid-template-columns: repeat(4, 1fr); }
}

.highlight {
  display: flex;
  align-items: flex-start;
  gap: var(--space-6);
  margin-top: var(--space-6);
  padding: var(--space-8);
  background-color: var(--color-primary);
  border-radius: var(--radius-card);
  border-left: 4px solid var(--color-accent);
}

.highlight__icon {
  flex-shrink: 0;
  color: var(--color-accent);
  margin-top: var(--space-1);
}

.highlight__title {
  color: var(--color-on-dark);
  margin-bottom: var(--space-2);
}

.highlight__text {
  color: var(--color-on-dark-muted);
  font-size: 1.0625rem;
  max-width: 68ch;
}

@media (max-width: 639px) {
  .highlight { flex-direction: column; gap: var(--space-4); }
}


/* ================================================================
   7. HEADER
================================================================ */
.site-header {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: 100;
  min-height: var(--header-height);
  display: flex;
  align-items: center;
}

/* Camada separada para o efeito de vidro fosco ao rolar. Isolar o
   backdrop-filter aqui (em vez de aplicá-lo direto no .site-header)
   evita que ele vire "containing block" para o menu mobile, que é
   position:fixed e precisa continuar relativo à janela inteira. */
.site-header__backdrop {
  position: absolute;
  inset: 0;
  z-index: -1;
  background-color: transparent;
  transition: background-color var(--transition-base), box-shadow var(--transition-base),
              backdrop-filter var(--transition-base);
}

.site-header--scrolled .site-header__backdrop {
  background-color: rgba(250, 250, 248, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-xs);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  row-gap: var(--space-2);
  width: 100%;
}

@media (min-width: 1024px) {
  /* O header usa um respiro lateral menor que as demais seções,
     é uma barra de navegação densa, não um bloco de conteúdo. */
  .site-header .container {
    padding-inline: var(--space-8);
  }
}

.logo { display: flex; align-items: center; gap: var(--space-3); flex-shrink: 0; }

.logo__mark {
  flex-shrink: 0;
  height: 34px;
  width: auto;
}

.logo__text { display: flex; flex-direction: column; line-height: 1.15; }

.logo__title {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-on-dark);
  white-space: nowrap;
  transition: color var(--transition-base);
}

.logo__subtitle {
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-on-dark-muted);
  white-space: nowrap;
  transition: color var(--transition-base);
}

.site-header--scrolled .logo__title { color: var(--color-primary-dark); }
.site-header--scrolled .logo__subtitle { color: var(--color-text-muted); }
.logo__title--light { color: var(--color-on-dark); }

.menu-toggle {
  position: relative;
  z-index: 110;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px; height: 44px;
  color: var(--color-on-dark);
  transition: color var(--transition-base);
}

.site-header--scrolled .menu-toggle { color: var(--color-primary-dark); }

.menu-toggle__icon {
  position: absolute;
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.menu-toggle__icon--close { opacity: 0; transform: rotate(-90deg); }
.menu-toggle[aria-expanded="true"] .menu-toggle__icon--open { opacity: 0; transform: rotate(90deg); }
.menu-toggle[aria-expanded="true"] .menu-toggle__icon--close { opacity: 1; transform: rotate(0deg); }

.nav {
  position: fixed;
  inset-block: 0;
  inset-inline-end: 0;
  width: min(88vw, 360px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-8);
  padding: var(--space-16) var(--space-8);
  background-color: var(--color-primary);
  transform: translateX(100%);
  transition: transform var(--transition-slow);
}

.nav.is-open { transform: translateX(0); }

.nav__list { display: flex; flex-direction: column; gap: var(--space-6); }

.nav__link {
  display: inline-block;
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--color-on-dark);
  position: relative;
  transition: color var(--transition-base);
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 0; bottom: -4px;
  width: 0; height: 1.5px;
  background-color: var(--color-accent);
  transition: width var(--transition-base);
}

.nav__link:hover, .nav__link--active { color: var(--color-accent); }
.nav__link--active::after { width: 100%; }
.nav .btn--nav { width: 100%; }

@media (min-width: 1024px) {
  .menu-toggle { display: none; }

  .nav {
    position: static;
    width: auto;
    flex-direction: row;
    align-items: center;
    gap: var(--space-6);
    padding: 0;
    background-color: transparent;
    transform: none;
    transition: none;
  }

  .nav__list { flex-direction: row; gap: var(--space-6); }
  .nav__link { font-size: var(--text-small); color: var(--color-on-dark); white-space: nowrap; }
  .site-header--scrolled .nav__link { color: var(--color-text); }
  .btn--nav { padding-inline: var(--space-4); }
}

@media (min-width: 1280px) {
  .nav { gap: var(--space-8); }
  .nav__list { gap: var(--space-8); }
  .btn--nav { padding-inline: var(--space-6); }
}


/* ================================================================
   8. HERO
================================================================ */
.hero {
  position: relative;
  overflow: hidden;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-block: calc(var(--header-height) + var(--space-16)) var(--space-16);
  background-color: var(--color-primary);
  isolation: isolate;
}

.hero__background { position: absolute; inset: 0; z-index: -1; }

.hero__radial {
  position: absolute; inset: 0;
  background:
    radial-gradient(60% 55% at 78% 22%, rgba(200, 160, 77, 0.10) 0%, rgba(200, 160, 77, 0) 70%),
    radial-gradient(80% 70% at 15% 85%, rgba(22, 58, 112, 0.35) 0%, rgba(22, 58, 112, 0) 65%),
    linear-gradient(160deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
}

.hero__contours { position: absolute; inset: 0; width: 100%; height: 100%; }

.hero__contour-line {
  fill: none;
  stroke: var(--color-accent);
  stroke-width: 1.4;
  opacity: 0.05;
}

.hero__grid { display: grid; gap: var(--space-16); grid-template-columns: 1fr; }

.hero__content { display: flex; flex-direction: column; align-items: flex-start; gap: var(--space-6); }

.hero__title { color: var(--color-on-dark); max-width: 22ch; }

.hero__subtitle {
  font-size: 1.125rem;
  color: var(--color-on-dark-muted);
  max-width: 42ch;
  line-height: var(--leading-body);
}

.hero__actions { display: flex; flex-wrap: wrap; gap: var(--space-4); margin-top: var(--space-2); }

.trust-indicators { display: flex; flex-direction: column; gap: var(--space-3); margin-top: var(--space-6); }

.trust-indicators__item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-small);
  font-weight: 500;
  color: var(--color-on-dark);
}

.trust-indicators__item .icon { color: var(--color-accent); }

.hero__photo { display: flex; justify-content: center; }

.hero__photo-frame {
  position: relative;
  width: 100%;
  max-width: 420px;
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.hero__photo-frame::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(23, 70, 45, 0) 65%, var(--color-primary-dark) 100%);
  pointer-events: none;
}

.hero__photo-frame img { width: 100%; height: 100%; object-fit: cover; }

.scroll-indicator {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  border: 1px solid rgba(243, 241, 234, 0.35);
  border-radius: 999px;
  color: var(--color-on-dark);
  transition: border-color var(--transition-base), transform var(--transition-base);
}

.scroll-indicator:hover { border-color: var(--color-accent); transform: translateX(-50%) translateY(4px); }

@media (min-width: 480px) {
  .hero__actions .btn { flex: 0 0 auto; }
}

@media (min-width: 768px) {
  .hero { padding-block: calc(var(--header-height) + var(--space-24)) var(--space-24); }
}

@media (min-width: 1024px) {
  .hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
    min-height: calc(100svh - var(--header-height));
  }
  .hero__content { padding-right: var(--space-8); }
  .hero__photo { justify-content: flex-end; }
  .hero__photo-frame { max-width: 100%; }
  .scroll-indicator { display: flex; }
}

@media (min-width: 1280px) {
  .hero__title { max-width: 20ch; }
}


/* ================================================================
   9. TIMELINE (Como Trabalhamos)
================================================================ */
.timeline {
  display: grid;
  gap: var(--space-8);
  grid-template-columns: 1fr;
  counter-reset: none;
}

.timeline__item {
  position: relative;
  padding-left: var(--space-12);
  border-left: 1.5px solid var(--color-gray);
}

.timeline__marker {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-small);
  color: var(--color-accent);
  margin-bottom: var(--space-2);
}

.timeline__title { margin-bottom: var(--space-2); }
.timeline__text { color: var(--color-text-muted); }

@media (min-width: 1024px) {
  .timeline {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
  }
  .timeline__item {
    padding-left: 0;
    padding-top: var(--space-8);
    border-left: none;
    border-top: 1.5px solid var(--color-gray);
  }
}


/* ================================================================
   10. SOBRE
================================================================ */
.sobre__grid {
  display: grid;
  gap: var(--space-12);
  align-items: center;
}

.sobre__photo {
  border-radius: var(--radius-card);
  overflow: hidden;
  max-width: 420px;
  margin-inline: auto;
  box-shadow: var(--shadow-card);
}

.sobre__text {
  color: var(--color-text-muted);
  font-size: 1.0625rem;
  margin-bottom: var(--space-8);
  max-width: 52ch;
}

@media (min-width: 1024px) {
  .sobre__grid { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: var(--space-24); }
  .sobre__photo { margin-inline: 0; max-width: none; }
}


/* ================================================================
   11. INSTITUCIONAL (valores)
================================================================ */
.institucional { background-color: var(--color-gray); }

.values-grid {
  display: grid;
  gap: var(--space-8);
  grid-template-columns: 1fr;
}

.value__icon { color: var(--color-primary); margin-bottom: var(--space-4); }
.value__title { margin-bottom: var(--space-2); }
.value__text { color: var(--color-text-muted); }

@media (min-width: 640px) {
  .values-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .values-grid { grid-template-columns: repeat(4, 1fr); }
}


/* ================================================================
   12. FAQ
================================================================ */
.faq__container { max-width: 800px; }

.accordion { display: flex; flex-direction: column; }

.faq-item { border-bottom: 1px solid var(--color-gray); }

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-6);
  text-align: left;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-text);
}

.faq-question__icon {
  color: var(--color-accent);
  transition: transform var(--transition-base);
  flex-shrink: 0;
}

.faq-question[aria-expanded="true"] .faq-question__icon { transform: rotate(45deg); }

.faq-answer {
  overflow: hidden;
  max-height: 0;
  transition: max-height var(--transition-slow) ease, padding-bottom var(--transition-slow) ease;
}

.faq-answer[data-open="true"] {
  padding-bottom: var(--space-6);
}

.faq-answer p {
  color: var(--color-text-muted);
  max-width: 68ch;
}


/* ================================================================
   13. CTA FINAL
================================================================ */
.cta-final {
  background-color: var(--color-primary);
  text-align: center;
}

.cta-final__inner {
  max-width: 640px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
}

.cta-final__title { color: var(--color-on-dark); }
.cta-final__text { color: var(--color-on-dark-muted); font-size: 1.0625rem; }


/* ================================================================
   14. RODAPÉ
================================================================ */
.site-footer {
  background-color: var(--color-primary-dark);
  color: var(--color-on-dark-muted);
  padding-block: var(--space-16) var(--space-8);
}

.footer__grid {
  display: grid;
  gap: var(--space-12);
  grid-template-columns: 1fr;
  padding-bottom: var(--space-12);
}

.footer__brand { display: flex; flex-direction: column; align-items: flex-start; gap: var(--space-3); }

.footer__logo-mark { height: 40px; width: auto; }

.footer__note {
  font-size: var(--text-small);
  color: var(--color-on-dark-muted);
  padding-top: var(--space-1);
}

.footer__tagline {
  font-size: var(--text-small);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-on-dark-muted);
}

.footer__social {
  display: inline-flex;
  width: 36px; height: 36px;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(243, 241, 234, 0.25);
  border-radius: 999px;
  color: var(--color-on-dark);
  transition: border-color var(--transition-base), color var(--transition-base);
}

.footer__social:hover { border-color: var(--color-accent); color: var(--color-accent); }

.footer__heading {
  font-family: var(--font-body);
  font-size: var(--text-small);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-on-dark);
  margin-bottom: var(--space-4);
}

.footer__col ul { display: flex; flex-direction: column; gap: var(--space-3); }

.footer__col a { transition: color var(--transition-base); }
.footer__col a:hover { color: var(--color-accent); }

.footer__contact li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
}

.footer__contact li .icon {
  margin-top: 2px;
}

.footer__bottom {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding-top: var(--space-8);
  border-top: 1px solid rgba(243, 241, 234, 0.12);
  font-size: var(--text-small);
}

.footer__bottom-info {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-3);
}

.footer__credit {
  opacity: 0.7;
}

@media (min-width: 640px) {
  .footer__grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .footer__grid { grid-template-columns: 1.5fr repeat(3, 1fr); }
  .footer__bottom { flex-direction: row; justify-content: space-between; }
}


/* ================================================================
   15. BOTÃO FLUTUANTE DE WHATSAPP
   Sempre visível, mobile e desktop, canto inferior direito.
================================================================ */
.whatsapp-float {
  position: fixed;
  z-index: 90;
  right: var(--space-4);
  bottom: max(var(--space-4), env(safe-area-inset-bottom));
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-primary);
  color: var(--color-on-dark);
  border-radius: 999px;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base), background-color var(--transition-base);
}

.whatsapp-float:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-3px);
  box-shadow: 0 10px 28px rgba(23, 70, 45, 0.28);
}

.whatsapp-float:active {
  transform: translateY(0);
}

@media (min-width: 640px) {
  .whatsapp-float {
    right: var(--space-6);
    bottom: max(var(--space-6), env(safe-area-inset-bottom));
  }
}


/* ================================================================
   16. ANIMAÇÕES: Fade Up / Fade In / Hover / Scroll Reveal
   Lista fechada, conforme Design System (nada além disso).
   As classes .is-visible são adicionadas via IntersectionObserver
   em script.js.
================================================================ */
[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--reveal-duration) ease-out,
              transform var(--reveal-duration) ease-out;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger discreto entre itens de um mesmo grupo (cards, timeline, valores) */
[data-reveal-group] [data-reveal]:nth-child(1) { transition-delay: 0ms; }
[data-reveal-group] [data-reveal]:nth-child(2) { transition-delay: 80ms; }
[data-reveal-group] [data-reveal]:nth-child(3) { transition-delay: 160ms; }
[data-reveal-group] [data-reveal]:nth-child(4) { transition-delay: 240ms; }

@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; transition: none; }
}