/* ==========================================================
   AJ ORBEM — Construções e Empreendimentos
   Concreto + aço + vermelho de obra.
   Motivo assinatura: "linha de cota" do desenho técnico,
   usada como divisor, legenda e régua de seção.
   ========================================================== */

:root {
  --ink:        #15120e;
  --ink-2:      #1d1811;
  --ink-3:      #2a231a;
  --paper:      #f4f0e6;
  --paper-2:    #ebe5d6;
  --cream:      #f7f3ea;
  --red:        #ec0107;   /* preenchimentos: botões, barras, ícone da marca */
  --red-hi:     #ff2a20;
  --red-soft:   #ff5b52;   /* texto vermelho sobre fundo escuro */
  --red-ink:    #c40105;   /* texto pequeno sobre fundo claro (contraste ≥ 4.5) */
  --red-glow:   rgba(236, 1, 7, .32);
  --steel:      #6b665c;
  --steel-lt:   #a8a191;

  --line-dark:  rgba(247, 243, 234, .15);
  --line-light: rgba(21, 18, 14, .14);

  --font-display: "Big Shoulders Display", "Arial Narrow", sans-serif;
  --font-body:    "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  --font-mono:    "IBM Plex Mono", ui-monospace, Menlo, monospace;

  --container: 1240px;
  --gut: 22px;
  --radius: 3px;
  --ease: cubic-bezier(.22, 1, .36, 1);
  --ease-out: cubic-bezier(.16, 1, .3, 1);
}

@media (min-width: 900px) { :root { --gut: 40px; } }

*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, picture, svg { display: block; max-width: 100%; }
img { height: auto; }
a { color: inherit; text-decoration: none; }
p, figure, figcaption, blockquote { margin: 0; }
h1, h2, h3, h4 { margin: 0; font-family: var(--font-display); text-wrap: balance; }
button { font-family: inherit; cursor: pointer; }

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gut);
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--red);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  left: 12px; top: -70px;
  z-index: 300;
  background: var(--red);
  color: #fff;
  padding: 11px 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  transition: top .2s var(--ease);
}
.skip-link:focus { top: 12px; }

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

/* ---------- ícones: um único sistema ---------- */

.ico {
  flex: none;
  width: 18px;
  height: 18px;
  display: block;
}
.ico--sm { width: 15px; height: 15px; }
.ico--lg { width: 26px; height: 26px; }

/* ---------- eyebrow + linha de cota ---------- */

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--red-ink);
}
.eyebrow::before {
  content: "";
  width: 28px; height: 1px;
  background: currentColor;
  transform-origin: left;
}
.on-dark { color: var(--red-soft); }

.rule {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--steel);
}
.rule::before, .rule::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line-light);
}
.section--dark .rule { color: var(--steel-lt); }
.section--dark .rule::before,
.section--dark .rule::after { background: var(--line-dark); }

/* ---------- topbar ---------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(21, 18, 14, .93);
  backdrop-filter: saturate(150%) blur(12px);
  border-bottom: 1px solid var(--line-dark);
  transition: box-shadow .3s var(--ease), background .3s var(--ease);
}
.topbar.is-stuck {
  background: rgba(21, 18, 14, .985);
  box-shadow: 0 10px 30px rgba(0, 0, 0, .38);
}

.topbar__in {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding-block: 12px;
}

.brand { flex: none; display: block; }
.brand img {
  height: 30px;
  width: auto;
}
@media (min-width: 700px) { .brand img { height: 36px; } }

.nav {
  display: none;
  align-items: center;
  gap: 30px;
  font-size: 14.5px;
  color: var(--cream);
}
.nav a { position: relative; padding-block: 5px; opacity: .8; transition: opacity .2s var(--ease); }
.nav a:hover { opacity: 1; }
.nav a::after {
  content: "";
  position: absolute; left: 0; right: 0; bottom: 0;
  height: 2px;
  background: var(--red);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .28s var(--ease);
}
.nav a:hover::after { transform: scaleX(1); }
@media (min-width: 1000px) { .nav { display: flex; } }

.topbar__right { display: flex; align-items: center; gap: 12px; }

.tel {
  display: none;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: var(--cream);
  transition: color .2s var(--ease);
}
.tel .ico { color: var(--red-soft); }
.tel:hover { color: var(--red-soft); }
@media (min-width: 760px) { .tel { display: inline-flex; } }

/* ---------- botões ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 46px;
  padding: 13px 20px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 14.5px;
  line-height: 1.15;
  white-space: nowrap;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  transition: transform .16s var(--ease), background .2s var(--ease),
              border-color .2s var(--ease), box-shadow .2s var(--ease), color .2s var(--ease);
}
.btn:active { transform: translateY(1px); }

.btn--red {
  background: var(--red);
  color: #fff;
  box-shadow: 0 6px 20px var(--red-glow);
}
.btn--red:hover { background: var(--red-hi); box-shadow: 0 10px 28px var(--red-glow); }

.btn--dark {
  background: transparent;
  border-color: rgba(247, 243, 234, .34);
  color: var(--cream);
}
.btn--dark:hover { border-color: var(--cream); background: rgba(247, 243, 234, .08); }

.btn--light {
  background: transparent;
  border-color: var(--line-light);
  color: var(--ink);
}
.btn--light:hover { border-color: var(--red); color: var(--red); }

.btn--sm { min-height: 40px; padding: 10px 16px; font-size: 13.5px; }
.btn--wide { width: 100%; }

.topbar .btn--red { display: none; }
@media (min-width: 560px) { .topbar .btn--red { display: inline-flex; } }

.navbtn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px; height: 46px;
  background: transparent;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  color: var(--cream);
}
.navbtn:hover { border-color: var(--red); }
@media (min-width: 1000px) { .navbtn { display: none; } }

/* Sanfona por altura (JS mede o conteúdo).
   O truque grid 0fr→1fr não serve aqui: o `overflow:hidden` que o item
   precisa para colapsar zera também sua contribuição de altura na trilha,
   e o menu nunca abre. */
.mnav {
  height: 0;
  overflow: hidden;
  background: var(--ink-2);
  transition: height .32s var(--ease);
}
.mnav__in { display: flex; flex-direction: column; padding: 4px var(--gut) 20px; }
.mnav a {
  padding: 14px 2px;
  color: var(--cream);
  font-size: 16px;
  border-bottom: 1px solid var(--line-dark);
}
.mnav a:last-child { border-bottom: 0; }
@media (min-width: 1000px) { .mnav { display: none; } }

/* ---------- hero ---------- */

.hero {
  position: relative;
  display: flex;
  align-items: flex-end;
  min-height: 640px;
  color: var(--cream);
  overflow: hidden;
  background: var(--ink);
}
@media (min-width: 700px) { .hero { min-height: min(90svh, 880px); } }

.hero__media { position: absolute; inset: 0; z-index: 0; }
.hero__media img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: 50% 42%;
  animation: heroSettle 1.6s var(--ease-out) both;
}
@media (min-width: 700px) { .hero__media img { object-position: 60% 38%; } }

@keyframes heroSettle {
  from { transform: scale(1.08); }
  to   { transform: scale(1); }
}

.hero__media::after {
  content: "";
  position: absolute; inset: 0;
  background:
    linear-gradient(180deg, rgba(14,11,8,.62) 0%, rgba(14,11,8,.30) 34%, rgba(14,11,8,.90) 84%, var(--ink) 100%),
    linear-gradient(90deg, rgba(14,11,8,.80) 0%, rgba(14,11,8,.12) 62%);
}

.hero__in {
  position: relative;
  z-index: 1;
  width: 100%;
  /* folga extra embaixo p/ a barra fixa do mobile não cobrir os números */
  padding-block: 104px 96px;
}
@media (min-width: 640px) { .hero__in { padding-block: 130px 56px; } }

.hero h1 {
  margin-top: 16px;
  font-weight: 800;
  font-size: clamp(2.7rem, 2rem + 4.4vw, 6.2rem);
  line-height: .93;
  letter-spacing: -.012em;
  text-transform: uppercase;
  max-width: 15ch;
}
.hero h1 em { font-style: normal; color: var(--red); }

.hero__sub {
  margin-top: 20px;
  max-width: 44ch;
  font-size: clamp(1rem, .95rem + .28vw, 1.18rem);
  color: rgba(247, 243, 234, .87);
}

.hero__cta {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.hero__cta .btn { flex: 1 1 auto; }
@media (min-width: 560px) { .hero__cta .btn { flex: 0 0 auto; } }

/* stats */
.stats {
  margin-top: 34px;
  padding-top: 20px;
  border-top: 1px solid var(--line-dark);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}
@media (min-width: 700px) {
  .stats { margin-top: 44px; display: flex; flex-wrap: wrap; gap: 26px 56px; }
}
.stat { display: flex; flex-direction: column; gap: 3px; }
.stat__num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.1rem, 1.7rem + 1.5vw, 3rem);
  line-height: 1;
  color: var(--cream);
  font-variant-numeric: tabular-nums;
}
.stat__num b { color: var(--red); font-weight: inherit; }
.stat__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--steel-lt);
}

.scroll-cue {
  position: absolute;
  right: var(--gut); bottom: 30px;
  z-index: 1;
  display: none;
  align-items: center;
  gap: 12px;
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: rgba(247, 243, 234, .62);
}
.scroll-cue::after {
  content: "";
  width: 1px; height: 54px;
  background: linear-gradient(var(--red), transparent);
  animation: cueDrop 2.4s var(--ease) infinite;
  transform-origin: top;
}
@keyframes cueDrop {
  0%, 100% { transform: scaleY(.35); opacity: .5; }
  50%      { transform: scaleY(1);   opacity: 1; }
}
@media (min-width: 1000px) { .scroll-cue { display: flex; } }

/* ---------- seções ---------- */

.section { position: relative; padding-block: 76px; }
@media (min-width: 900px) { .section { padding-block: 118px; } }

.section--paper { background: var(--paper); }
.section--paper2 { background: var(--paper-2); }
.section--dark  { background: var(--ink); color: var(--cream); }

/* malha de projeto (blueprint) nas seções escuras */
.section--dark::before {
  content: "";
  position: absolute; inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(247,243,234,.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(247,243,234,.028) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 40%, #000 20%, transparent 78%);
}
.section--dark > * { position: relative; z-index: 1; }

.head { max-width: 700px; margin-bottom: 44px; }
.head h2 {
  margin-top: 14px;
  font-weight: 800;
  font-size: clamp(2rem, 1.6rem + 1.9vw, 3.2rem);
  line-height: 1.02;
  letter-spacing: -.01em;
  text-transform: uppercase;
}
/* NB: usar classe (e não `.head p`) — um seletor de elemento aqui
   venceria `.eyebrow` por especificidade e apagaria o vermelho da marca. */
.head__desc {
  margin-top: 16px;
  max-width: 56ch;
  font-size: 1.06rem;
  color: var(--steel);
}
.section--dark .head__desc { color: var(--steel-lt); }

/* ---------- moldura de imagem + cortina de revelação ---------- */

.frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--ink-3);
  box-shadow: 0 26px 54px -24px rgba(0, 0, 0, .55);
}
.frame img { width: 100%; height: 100%; object-fit: cover; }
.frame::after {
  content: "";
  position: absolute; inset: 0;
  box-shadow: inset 0 0 0 1px rgba(247, 243, 234, .13);
  pointer-events: none;
}
.frame__curtain {
  position: absolute; inset: 0;
  z-index: 2;
  background: var(--ink);
  transform-origin: top;
  transform: scaleY(1);
  transition: transform .95s var(--ease-out);
}
.is-in .frame__curtain { transform: scaleY(0); }

.tag {
  position: absolute;
  top: 14px; left: 14px;
  z-index: 3;
  background: var(--red);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: 7px 11px;
}

/* ---------- promessa ---------- */

.promise { display: grid; gap: 32px; }
@media (min-width: 900px) { .promise { grid-template-columns: 1.05fr .95fr; gap: 64px; } }

.promise__lead {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.55rem, 1.2rem + 1.6vw, 2.45rem);
  line-height: 1.12;
}
.promise__lead .hl { color: var(--red); }
.promise__body { display: flex; flex-direction: column; gap: 22px; }
.promise__desc { color: var(--steel); font-size: 1.05rem; }
.promise__row { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; }
.promise__row .tel-inline { font-family: var(--font-mono); font-size: 13.5px; color: var(--steel); }

/* ---------- fundador ---------- */

.founder { display: grid; gap: 36px; }
@media (min-width: 960px) { .founder { grid-template-columns: .78fr 1.22fr; gap: 64px; align-items: center; } }

.founder__frame { aspect-ratio: 4 / 5; max-width: 420px; }
@media (min-width: 960px) { .founder__frame { max-width: none; } }

.badge {
  position: absolute;
  left: 16px; bottom: 16px;
  z-index: 3;
  display: flex;
  flex-direction: column;
  gap: 1px;
  padding: 11px 15px;
  background: rgba(21, 18, 14, .86);
  backdrop-filter: blur(8px);
  border: 1px solid var(--line-dark);
}
.badge b {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.85rem;
  line-height: 1;
  color: var(--red);
  font-variant-numeric: tabular-nums;
}
.badge span {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--steel-lt);
}

.founder__body h2 {
  margin-top: 14px;
  font-weight: 800;
  font-size: clamp(1.9rem, 1.5rem + 1.6vw, 2.8rem);
  line-height: 1.03;
  text-transform: uppercase;
}
.founder__name {
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--red-soft);
}
.founder__desc { margin-top: 16px; color: var(--steel-lt); font-size: 1.05rem; }
.founder__body .promise__row { margin-top: 28px; }

/* ---------- escritório (imagem contida, não gigante) ---------- */

.office { display: grid; gap: 32px; align-items: center; }
@media (min-width: 900px) { .office { grid-template-columns: 1fr 1fr; gap: 56px; } }

.office__frame { aspect-ratio: 3 / 2; max-width: 560px; }
@media (min-width: 900px) { .office__frame { max-width: none; } }

.office h2 {
  margin-top: 14px;
  font-weight: 800;
  font-size: clamp(1.85rem, 1.5rem + 1.5vw, 2.6rem);
  line-height: 1.04;
  text-transform: uppercase;
}
.office__desc { margin-top: 16px; max-width: 44ch; color: var(--steel); font-size: 1.05rem; }

.addr {
  margin-top: 22px;
  display: flex;
  gap: 11px;
  align-items: flex-start;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--steel);
}
.addr .ico { color: var(--red-ink); margin-top: 2px; }
.office__cta { margin-top: 26px; display: flex; flex-wrap: wrap; gap: 12px; }

/* ---------- confiança / depoimentos ---------- */

.trust { display: grid; gap: 36px; }
@media (min-width: 980px) { .trust { grid-template-columns: .82fr 1.18fr; gap: 60px; align-items: center; } }

.trust__frame { aspect-ratio: 16 / 11; }

.trust__title {
  margin-top: 14px;
  font-weight: 800;
  font-size: clamp(2rem, 1.6rem + 1.9vw, 3.2rem);
  line-height: 1.02;
  text-transform: uppercase;
}
.trust__desc { margin-top: 16px; max-width: 52ch; color: var(--steel-lt); font-size: 1.05rem; }

.reviews { margin-top: 28px; display: flex; flex-direction: column; gap: 16px; }

.review {
  margin: 0;
  padding: 24px;
  background: rgba(247, 243, 234, .045);
  border: 1px solid var(--line-dark);
  border-left: 3px solid var(--red);
  border-radius: var(--radius);
}
.review__stars { color: #ffb020; font-size: 14px; letter-spacing: 3px; margin-bottom: 10px; }
.review p { font-size: 1rem; line-height: 1.62; color: var(--cream); }
.review footer {
  margin-top: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--steel-lt);
}
.avatar {
  flex: none;
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--red);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 12px;
}

/* ---------- projetos ---------- */

.projects { margin-top: 4px; }

.strip {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 74%;
  gap: 12px;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x mandatory;
  scroll-padding-inline: var(--gut);
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding-inline: var(--gut);
  margin-inline: calc(var(--gut) * -1);
  padding-bottom: 4px;
}
.strip::-webkit-scrollbar { display: none; }
.strip > * { scroll-snap-align: start; }

@media (min-width: 720px) {
  .strip {
    grid-auto-flow: row;
    grid-template-columns: repeat(3, 1fr);
    grid-auto-columns: auto;
    gap: 18px;
    overflow: visible;
    padding-inline: 0;
    margin-inline: 0;
  }
}

.tile {
  position: relative;
  display: block;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--ink-3);
  box-shadow: 0 16px 32px -18px rgba(0, 0, 0, .4);
}
.tile img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .7s var(--ease);
}
.tile:hover img { transform: scale(1.07); }
.tile::after {
  content: "";
  position: absolute; left: 0; right: 0; bottom: 0;
  height: 3px;
  background: var(--red);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .4s var(--ease);
}
.tile:hover::after, .tile:focus-visible::after { transform: scaleX(1); }

.projects__foot {
  margin-top: 34px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}
.projects__foot .rule { flex: 1 1 200px; }

/* ---------- contato final ---------- */

.final { display: grid; gap: 34px; align-items: center; }
@media (min-width: 900px) { .final { grid-template-columns: 1.15fr .85fr; gap: 56px; } }

.final h2 {
  margin-top: 14px;
  font-weight: 800;
  font-size: clamp(2rem, 1.6rem + 1.9vw, 3.2rem);
  line-height: 1.02;
  text-transform: uppercase;
}
.final__desc { margin-top: 15px; max-width: 48ch; color: var(--steel-lt); font-size: 1.05rem; }
.final__cta { margin-top: 26px; display: flex; flex-wrap: wrap; gap: 12px; }

.card {
  padding: 26px;
  background: var(--ink-2);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
}
.card h3 {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--red-soft);
}
.card__row {
  display: flex;
  gap: 12px;
  padding-block: 13px;
  border-top: 1px solid var(--line-dark);
  font-size: 14px;
  color: var(--cream);
  line-height: 1.5;
}
.card__row:first-of-type { border-top: 0; padding-top: 0; }
.card__row .ico { color: var(--red-soft); margin-top: 2px; }
.card__row a:hover { color: var(--red-soft); }

/* ---------- rodapé ---------- */

.footer {
  background: var(--ink);
  color: var(--steel-lt);
  border-top: 1px solid var(--line-dark);
  padding-block: 48px 26px;
}
.footer__top {
  display: flex;
  flex-wrap: wrap;
  gap: 30px;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--line-dark);
}
.footer__brand img { height: 34px; width: auto; }
.footer__nav { display: flex; flex-wrap: wrap; gap: 12px 26px; font-size: 14px; }
.footer__nav a:hover { color: var(--cream); }
.footer__social { display: flex; gap: 10px; }
.footer__social a {
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  transition: border-color .2s var(--ease), color .2s var(--ease), background .2s var(--ease);
}
.footer__social a:hover { border-color: var(--red); color: var(--red-soft); background: rgba(236,1,7,.08); }

.footer__bottom {
  padding-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 11.5px;
}

/* ---------- WhatsApp flutuante (desktop) ---------- */

.fab {
  position: fixed;
  right: 22px; bottom: 22px;
  z-index: 90;
  display: none;
  align-items: center;
  justify-content: center;
  width: 58px; height: 58px;
  border-radius: 50%;
  background: #25d366;
  color: #fff;
  box-shadow: 0 12px 30px rgba(0, 0, 0, .34);
  transition: transform .2s var(--ease);
}
.fab:hover { transform: scale(1.07); }
.fab::before {
  content: "";
  position: absolute; inset: -5px;
  border-radius: 50%;
  border: 2px solid rgba(37, 211, 102, .5);
  animation: ping 2.6s var(--ease) infinite;
}
@keyframes ping {
  0%   { transform: scale(.92); opacity: .85; }
  70%  { transform: scale(1.34); opacity: 0; }
  100% { opacity: 0; }
}
@media (min-width: 640px) { .fab { display: flex; } }

/* ---------- barra fixa mobile ---------- */

.dock {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 91;
  display: flex;
  gap: 9px;
  padding: 9px 12px;
  padding-bottom: max(9px, env(safe-area-inset-bottom));
  background: rgba(21, 18, 14, .97);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--line-dark);
}
.dock .btn { flex: 1; min-width: 0; }
.dock .btn--zap { flex: 2; }
@media (min-width: 640px) { .dock { display: none; } }

/* espaço para a dock não cobrir o rodapé */
@media (max-width: 639px) { .footer { padding-bottom: 92px; } }

/* ---------- revelação em scroll ---------- */

[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .7s var(--ease-out), transform .7s var(--ease-out);
  transition-delay: var(--d, 0ms);
}
[data-reveal].is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
  .frame__curtain { transform: scaleY(0); }
  .hero__media img { animation: none; }
}