:root {
  --bg: #f7f6f2;
  --paper: #ffffff;
  --ink: #171819;
  --muted: #666a6e;
  --line: rgba(23, 24, 25, .11);
  --graphite: #2b2e30;
  --stone: #d9d7cf;
  --mist: #e4ebee;
  --blue: #2f7f9f;
  --blue-soft: #85b5cd;
  --whatsapp: #1fae63;
  --whatsapp-dark: #128c4d;
  --whatsapp-soft: rgba(31, 174, 99, .16);
  --moss: #6f8268;
  --sand: #b8aa90;
  --shadow: 0 24px 70px rgba(26, 27, 27, .08);
  --radius: 8px;
  --container: min(1160px, calc(100vw - 40px));
  --wide-container: min(1280px, calc(100vw - 40px));
  --font-body: "Manrope", system-ui, sans-serif;
  --font-display: "Outfit", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.55;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
:focus-visible { outline: 3px solid rgba(31, 174, 99, .55); outline-offset: 4px; }
.skip-link {
  position: fixed;
  left: 16px;
  top: 16px;
  z-index: 1000;
  transform: translateY(-160%);
  background: var(--ink);
  color: #fff;
  padding: 10px 14px;
  border-radius: var(--radius);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: fixed;
  inset: 18px 20px auto;
  z-index: 50;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 22px;
  width: min(1180px, calc(100vw - 40px));
  margin: auto;
  padding: 10px 12px;
  border: 1px solid rgba(255,255,255,.24);
  border-radius: 8px;
  background: rgba(255,255,255,.72);
  box-shadow: 0 12px 40px rgba(0,0,0,.08);
  backdrop-filter: blur(18px);
  transition: transform .25s ease, background .25s ease, border-color .25s ease;
}
.site-header.is-scrolled {
  background: rgba(247,246,242,.92);
  border-color: var(--line);
}
.brand img {
  width: 118px;
  height: auto;
  mix-blend-mode: multiply;
}
.nav {
  display: flex;
  justify-content: center;
  gap: 24px;
  font-size: .9rem;
  font-weight: 700;
  color: rgba(23,24,25,.74);
}
.nav a { transition: color .2s ease; }
.nav a:hover { color: var(--blue); }
.header-cta {
  padding: 12px 16px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--whatsapp), var(--whatsapp-dark));
  color: #fff;
  font-size: .86rem;
  font-weight: 800;
  box-shadow: 0 16px 34px rgba(31,174,99,.24);
}
.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255,255,255,.7);
}
.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 5px auto;
  background: var(--ink);
  transition: transform .2s ease;
}


.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

/* Card em destaque */
.cardfinal {
  grid-column: 1 / -1; /* ocupa todas as colunas */
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 2rem;
  width: 100%;
}

/* Ajuste da imagem */
.cardfinal .product-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Ajuste do conteúdo */
.cardfinal .product-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

/* Responsivo */
@media (max-width: 768px) {
  .product-grid {
    grid-template-columns: 1fr;
  }

  .cardfinal {
    grid-template-columns: 1fr;
  }
}

.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: grid;
  align-items: end;
  overflow: hidden;
  padding: 148px 20px 78px;
  color: #fff;
}
.hero-media, .hero-overlay {
  position: absolute;
  inset: 0;
}
.hero-media img {
  width: 100%;
  height: 110%;
  object-fit: cover;
  object-position: center;
  transform: translate3d(0,0,0) scale(1.04);
  will-change: transform;
}
.hero-overlay {
  background:
    linear-gradient(180deg, rgba(8,9,9,.35), rgba(8,9,9,.42) 42%, rgba(8,9,9,.72)),
    radial-gradient(circle at 78% 18%, rgba(79,159,197,.22), transparent 34%);
}
.hero-content {
  position: relative;
  z-index: 1;
  width: var(--container);
  margin: 0 auto;
}
.eyebrow {
  margin: 0 0 14px;
  color: var(--blue);
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.hero .eyebrow { color: #d7eef8; }
h1, h2, h3 {
  font-family: var(--font-display);
  line-height: 1;
  letter-spacing: 0;
}
h1 {
  max-width: 850px;
  margin: 0;
  font-size: clamp(3.1rem, 8vw, 6rem);
}
h2 {
  margin: 0;
  max-width: 820px;
  font-size: clamp(2rem, 3.4vw, 3.15rem);
  line-height: 1.08;
}
h3 {
  margin: 0;
  font-size: clamp(1.35rem, 2vw, 2rem);
}
.hero-subtitle {
  max-width: 690px;
  margin: 24px 0 0;
  color: rgba(255,255,255,.84);
  font-size: clamp(1.05rem, 2vw, 1.35rem);
}
.hero-actions, .section-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 34px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 800;
  line-height: 1;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: linear-gradient(135deg, var(--whatsapp), var(--whatsapp-dark));
  color: #fff;
  box-shadow: 0 18px 44px rgba(31,174,99,.28);
}
.btn-secondary {
  background: linear-gradient(135deg, var(--whatsapp), var(--whatsapp-dark));
  color: #fff;
  box-shadow: 0 18px 44px rgba(31,174,99,.26);
}
.btn-glass {
  color: #fff;
  border-color: rgba(255,255,255,.34);
  background: rgba(255,255,255,.1);
  backdrop-filter: blur(12px);
}
.btn-quiet {
  background: var(--whatsapp-soft);
  color: var(--whatsapp-dark);
  border-color: rgba(31,174,99,.22);
}
.hero-proof {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 0;
  margin: 34px 0 0;
  list-style: none;
}
.hero-proof li {
  padding: 9px 12px;
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 8px;
  background: rgba(255,255,255,.1);
  font-size: .88rem;
  font-weight: 700;
  backdrop-filter: blur(12px);
}
.hero-proof li::before {
  content: "✓";
  margin-right: 8px;
  color: #d7eef8;
}
.scroll-cue {
  position: absolute;
  right: 32px;
  bottom: 30px;
  z-index: 2;
  width: 42px;
  height: 64px;
  border: 1px solid rgba(255,255,255,.34);
  border-radius: 999px;
}
.scroll-cue::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 14px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #fff;
  transform: translateX(-50%);
  animation: scrollDot 1.8s ease infinite;
}

.section {
  width: var(--container);
  margin: 0 auto;
  padding: 96px 0;
  scroll-margin-top: 130px;
}
.section-heading {
  display: block;
  max-width: 860px;
  margin: 0 0 38px;
}
.section-heading p:last-child {
  max-width: 620px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 1.05rem;
}
.section-heading .eyebrow {
  margin-bottom: 16px;
}
.intro-band {
  display: grid;
  grid-template-columns: repeat(3, 1fr) auto;
  gap: 16px;
  align-items: stretch;
  position: relative;
  z-index: 4;
  margin-top: -78px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255,255,255,.82);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}
.metric {
  padding: 24px;
  border-right: 1px solid var(--line);
}
.metric strong, .proof-card strong {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1;
}
.metric span, .proof-card span { color: var(--muted); font-size: .93rem; }
.text-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 18px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--whatsapp), var(--whatsapp-dark));
  color: #fff;
  font-weight: 800;
  box-shadow: 0 16px 38px rgba(31,174,99,.24);
}
.text-link::after {
  content: "→";
  font-size: 1.05rem;
}

.product-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(430px, .82fr);
  grid-template-rows: repeat(2, minmax(230px, auto));
  gap: 22px;
  align-items: stretch;
}
.product-card {
  display: grid;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  box-shadow: 0 10px 36px rgba(23,24,25,.05);
  transition: transform .25s ease, box-shadow .25s ease;
}
.product-card-featured {
  grid-row: 1 / 3;
  grid-template-columns: minmax(0, 1fr) minmax(330px, .9fr);
}
.product-card:not(.product-card-featured) {
  grid-template-columns: 38% 1fr;
  min-height: 230px;
}
.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}
.product-media {
  min-height: 0;
  overflow: hidden;
  background: var(--stone);
}
.product-media img {
  width: 100%;
  height: 100%;
  min-height: 100%;
  aspect-ratio: auto;
  object-fit: cover;
  background: var(--stone);
}
.product-card-featured .product-media img { object-position: 50% 45%; }
.product-card:nth-child(2) .product-media img { object-position: 50% 54%; }
.product-card:nth-child(3) .product-media img { object-position: 52% 42%; }
.product-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(24px, 3vw, 42px);
}
.product-card:not(.product-card-featured) .product-copy {
  padding: 24px 26px;
}
.product-card span, .application-row span {
  display: block;
  margin-bottom: 8px;
  color: var(--blue);
  font-size: .78rem;
  font-weight: 800;
  text-transform: uppercase;
}
.product-card p, .application-row p, .lead-copy p, .lead-copy li { color: var(--muted); }
.product-card p {
  margin: 16px 0 0;
}
.product-card ul {
  display: grid;
  gap: 10px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  color: var(--muted);
  font-size: .94rem;
}
.product-card li {
  position: relative;
  padding-left: 18px;
}
.product-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--blue);
}
.product-card a {
  display: inline-flex;
  width: fit-content;
  margin-top: auto;
  padding-top: 24px;
  color: var(--whatsapp-dark);
  font-weight: 800;
}

.product-card-featured h3 {
  font-size: clamp(2rem, 3vw, 2.65rem);
}
.product-card:not(.product-card-featured) h3 {
  font-size: clamp(1.45rem, 2vw, 1.9rem);
}
.product-card:not(.product-card-featured) p {
  font-size: .96rem;
}

.stone-catalog {
  padding-top: 28px;
}
.stone-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}
.stone-card {
  display: grid;
  grid-template-rows: 160px 1fr;
  min-height: 210px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255,255,255,.82);
  box-shadow: 0 10px 32px rgba(23,24,25,.04);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.stone-card:hover {
  transform: translateY(-4px);
  border-color: rgba(47,127,159,.28);
  box-shadow: var(--shadow);
}
.stone-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: var(--stone);
}
.stone-card:nth-child(1) img { object-position: 50% 58%; }
.stone-card:nth-child(2) img { object-position: 45% 52%; }
.stone-card:nth-child(3) img { object-position: 50% 58%; }
.stone-card:nth-child(4) img { object-position: 50% 48%; }
.stone-card:nth-child(5) img { object-position: 50% 48%; }
.stone-card:nth-child(6) img { object-position: 52% 42%; }
.stone-card div {
  display: flex;
  flex-direction: column;
  padding: 22px 24px 24px;
}
.stone-card h3 {
  margin-top: 0;
  font-size: 1.45rem;
  line-height: 1.05;
}
.stone-card p {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: .92rem;
}
.stone-card a {
  width: fit-content;
  margin-top: auto;
  padding-top: 18px;
  color: var(--whatsapp-dark);
  font-size: .9rem;
  font-weight: 900;
}

.gallery-section {
  width: var(--wide-container);
  padding-left: 0;
  padding-right: 0;
}
.masonry {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  grid-template-rows: repeat(6, 112px);
  gap: 18px;
  grid-auto-flow: dense;
}
.gallery-item {
  position: relative;
  grid-column: span 4;
  grid-row: span 3;
  overflow: hidden;
  border: 0;
  border-radius: 8px;
  padding: 0;
  background: var(--graphite);
  color: #fff;
}
.gallery-item:nth-child(1) {
  grid-column: 1 / 5;
  grid-row: 1 / 4;
}
.gallery-item:nth-child(2) {
  grid-column: 5 / 9;
  grid-row: 1 / 4;
}
.gallery-item:nth-child(3) {
  grid-column: 9 / 13;
  grid-row: 1 / 4;
}
.gallery-item:nth-child(4) {
  grid-column: 5 / 13;
  grid-row: 4 / 7;
}
.gallery-item:nth-child(5) {
  grid-column: 1 / 5;
  grid-row: 4 / 7;
}
.gallery-item:nth-child(1) img { object-position: 50% 56%; }
.gallery-item:nth-child(2) img { object-position: 50% 64%; }
.gallery-item:nth-child(3) img { object-position: 50% 48%; }
.gallery-item:nth-child(4) img { object-position: 50% 45%; }
.gallery-item:nth-child(5) img { object-position: 52% 54%; }
.gallery-item:nth-child(5)::after {
  content: "Origem";
  position: absolute;
  right: 16px;
  top: 16px;
  padding: 8px 10px;
  border-radius: 8px;
  background: rgba(23,24,25,.64);
  color: #fff;
  font-size: .78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .08em;
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .6s ease, filter .4s ease;
}
.gallery-item:hover img { transform: scale(1.06); filter: brightness(.86); }
.gallery-item span {
  position: absolute;
  left: 16px;
  bottom: 16px;
  padding: 9px 11px;
  border-radius: 8px;
  background: rgba(255,255,255,.16);
  font-weight: 800;
  backdrop-filter: blur(12px);
}
.section-cta {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: clamp(22px, 5vw, 64px);
  align-items: center;
  margin-top: 26px;
  padding: clamp(26px, 4vw, 44px);
  overflow: hidden;
  border: 1px solid rgba(23,24,25,.1);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(255,255,255,.94), rgba(228,235,238,.66)),
    radial-gradient(circle at 94% 18%, var(--whatsapp-soft), transparent 34%);
  box-shadow: 0 28px 80px rgba(23,24,25,.08);
}
.section-cta::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(31,174,99,.26), transparent 38%),
    linear-gradient(180deg, rgba(255,255,255,.5), transparent);
  opacity: .38;
}
.section-cta > * {
  position: relative;
  z-index: 1;
}
.cta-copy {
  max-width: 720px;
}
.cta-copy span {
  display: inline-flex;
  margin-bottom: 14px;
  color: var(--blue);
  font-size: .76rem;
  font-weight: 900;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.cta-copy h3 {
  max-width: 680px;
  font-size: clamp(1.65rem, 3vw, 2.6rem);
  line-height: 1.04;
}
.cta-copy p {
  max-width: 650px;
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 1.02rem;
}
.cta-action {
  display: grid;
  justify-items: end;
  gap: 10px;
  min-width: 220px;
}
.cta-action small {
  color: rgba(23,24,25,.58);
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.cta-gallery {
  background:
    linear-gradient(135deg, rgba(255,255,255,.95), rgba(244,244,240,.78)),
    radial-gradient(circle at 96% 12%, rgba(31,174,99,.18), transparent 32%);
}
.cta-process {
  background:
    linear-gradient(135deg, rgba(23,24,25,.94), rgba(43,46,48,.9)),
    url("../assets/images/pedreira-sao-tome-extracao-thumb.webp") center/cover;
  color: #fff;
}
.cta-process::before {
  background:
    linear-gradient(90deg, rgba(31,174,99,.3), transparent 46%),
    rgba(0,0,0,.28);
  opacity: 1;
}
.cta-process .cta-copy span,
.cta-process .cta-copy p,
.cta-process .cta-action small {
  color: rgba(255,255,255,.74);
}
.cta-process .btn-primary {
  background: linear-gradient(135deg, var(--whatsapp), var(--whatsapp-dark));
  color: #fff;
  box-shadow: 0 18px 44px rgba(31,174,99,.26);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.feature-card {
  min-height: 188px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(180deg, #fff, rgba(255,255,255,.64));
  transition: transform .25s ease, border-color .25s ease;
}
.feature-card:hover {
  transform: translateY(-5px);
  border-color: rgba(79,159,197,.38);
}
.feature-card span {
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  margin-bottom: 30px;
  border-radius: 8px;
  background: var(--mist);
  color: var(--graphite);
  font-weight: 800;
}
.feature-card p { color: var(--muted); }

.applications { display: grid; gap: 18px; }
.application-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, .72fr);
  align-items: center;
  gap: clamp(28px, 5vw, 64px);
  padding: clamp(16px, 2.4vw, 28px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}
.application-row.reverse img { order: 2; }
.application-row img {
  width: 100%;
  height: clamp(440px, 44vw, 600px);
  min-height: 0;
  object-fit: cover;
  object-position: center;
  border-radius: 8px;
  background: var(--stone);
}
.application-row:nth-of-type(1) img { object-position: 50% 44%; }
.application-row:nth-of-type(2) img { object-position: 50% 52%; }
.application-row div {
  max-width: 520px;
}
.application-row .btn { margin-top: 18px; }

.timeline {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: item;
}
.timeline li {
  position: relative;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}
.timeline li::after {
  content: "";
  position: absolute;
  top: 38px;
  right: -12px;
  width: 12px;
  height: 1px;
  background: var(--line);
}
.timeline li:last-child::after { display: none; }
.timeline span {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  margin-bottom: 18px;
  border-radius: 50%;
  background: var(--blue);
  color: #fff;
  font-weight: 800;
}
.timeline p { color: var(--muted); font-size: .9rem; }

.proof-layout {
  display: grid;
  grid-template-columns: 1.2fr .8fr .8fr;
  grid-auto-rows: minmax(220px, auto);
  gap: 14px;
}
.testimonial, .proof-card {
  min-height: 230px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}
.testimonial {
  grid-row: span 2;
  display: flex;
  flex-direction: column;
  justify-content: end;
  background: linear-gradient(145deg, rgba(23,24,25,.92), rgba(43,46,48,.86)), url("../assets/images/pedreira-sao-tome-extracao-thumb.webp") center/cover;
  color: #fff;
}
.testimonial p { font-family: var(--font-display); font-size: clamp(1.5rem, 3vw, 2.5rem); line-height: 1.08; }
.testimonial span { color: rgba(255,255,255,.68); }
.image-card { padding: 0; overflow: hidden; }
.proof-layout .image-card { grid-column: span 2; }
.image-card img {
  width: 100%;
  height: 100%;
  min-height: 230px;
  object-fit: cover;
  object-position: center;
}

.lead-section {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 34px;
  align-items: start;
}
.lead-copy {
  position: sticky;
  top: 120px;
}
.lead-copy ul {
  padding: 0;
  margin: 26px 0 0;
  list-style: none;
}
.lead-copy li {
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}
.lead-copy li::before {
  content: "✓";
  margin-right: 10px;
  color: var(--blue);
  font-weight: 800;
}
.lead-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255,255,255,.86);
  box-shadow: var(--shadow);
}
.field { display: grid; gap: 7px; }
.field.full, .lead-form .full { grid-column: 1 / -1; }
label { font-weight: 800; font-size: .9rem; }
input, select, textarea {
  width: 100%;
  border: 1px solid rgba(23,24,25,.16);
  border-radius: 8px;
  background: #fff;
  padding: 14px 14px;
  color: var(--ink);
}
textarea { resize: vertical; }
.field small {
  display: none;
  color: #9b2d24;
  font-size: .8rem;
}
.field.is-invalid input,
.field.is-invalid select,
.field.is-invalid textarea { border-color: #b43c31; background: #fff8f7; }
.field.is-invalid small { display: block; }
.form-note {
  grid-column: 1 / -1;
  margin: 0;
  color: var(--muted);
  font-size: .84rem;
}

.accordion {
  display: grid;
  gap: 10px;
}
.faq-item {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  overflow: hidden;
}
.faq-item button {
  display: flex;
  justify-content: space-between;
  width: 100%;
  border: 0;
  background: transparent;
  padding: 22px;
  color: var(--ink);
  font-weight: 800;
  text-align: left;
}
.faq-item button::after { content: "+"; font-size: 1.4rem; }
.faq-item.is-open button::after { content: "−"; }
.faq-item div {
  max-height: 0;
  overflow: hidden;
  transition: max-height .25s ease;
}
.faq-item p {
  margin: 0;
  padding: 0 22px 22px;
  color: var(--muted);
}

.site-footer {
  display: grid;
  grid-template-columns: 1.4fr .8fr 1fr;
  gap: 34px;
  padding: 62px max(20px, calc((100vw - 1160px) / 2));
  background: #111213;
  color: #fff;
}
.site-footer img {
  width: 132px;
  border-radius: 6px;
  background: #fff;
}
.site-footer p, .site-footer small { color: rgba(255,255,255,.62); }
.site-footer nav, .site-footer address {
  display: grid;
  gap: 10px;
  font-style: normal;
}
.site-footer small { grid-column: 1 / -1; border-top: 1px solid rgba(255,255,255,.12); padding-top: 18px; }

.whatsapp-float, .back-to-top {
  position: fixed;
  z-index: 45;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 50%;
  color: #fff;
}
.whatsapp-float {
  right: 18px;
  bottom: 18px;
  width: 60px;
  height: 60px;
  background: #1d9f58;
  font-weight: 900;
  box-shadow: 0 14px 34px rgba(29,159,88,.28);
  animation: pulse 2.2s ease infinite;
}
.back-to-top {
  right: 22px;
  bottom: 92px;
  width: 44px;
  height: 44px;
  background: var(--ink);
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s ease, transform .2s ease;
}
.back-to-top.is-visible {
  opacity: 1;
  pointer-events: auto;
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: none;
  place-items: center;
  padding: 24px;
  background: rgba(10,11,11,.88);
}
.lightbox.is-open { display: grid; }
.lightbox img {
  max-height: 86vh;
  border-radius: 8px;
  box-shadow: 0 30px 100px rgba(0,0,0,.45);
}
.lightbox button {
  position: fixed;
  right: 20px;
  top: 20px;
  width: 46px;
  height: 46px;
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 50%;
  background: rgba(255,255,255,.08);
  color: #fff;
  font-size: 2rem;
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
@keyframes scrollDot {
  0% { opacity: 0; transform: translate(-50%, 0); }
  30% { opacity: 1; }
  100% { opacity: 0; transform: translate(-50%, 26px); }
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(29,159,88,.34), 0 14px 34px rgba(29,159,88,.28); }
  50% { box-shadow: 0 0 0 12px rgba(29,159,88,0), 0 14px 34px rgba(29,159,88,.28); }
}

@media (max-width: 980px) {
  .site-header { grid-template-columns: auto 1fr auto; }
  .nav {
    position: fixed;
    left: 0;
    right: 0;
    top: calc(100% + 10px);
    display: none;
    flex-direction: column;
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: rgba(255,255,255,.96);
    box-shadow: var(--shadow);
  }
  .nav.is-open { display: flex; }
  .header-cta { justify-self: end; }
  .menu-toggle { display: block; }
  .section-heading,
  .intro-band,
  .lead-section,
  .application-row,
  .site-footer { grid-template-columns: 1fr; }
  .lead-copy { position: static; }
  .product-grid {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
  }
  .product-card-featured,
  .product-card:not(.product-card-featured) {
    grid-row: auto;
    grid-template-columns: 1fr;
  }
  .product-media img {
    height: auto;
    min-height: 0;
    aspect-ratio: 16 / 10;
  }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .stone-grid { grid-template-columns: 1fr 1fr; }
  .stone-card { grid-template-rows: 170px 1fr; }
  .timeline { grid-template-columns: 1fr 1fr; }
  .timeline li::after { display: none; }
  .masonry {
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: none;
    grid-auto-rows: 220px;
  }
  .gallery-item,
  .gallery-item.wide,
  .gallery-item.tall,
  .gallery-item:nth-child(n) {
    grid-column: auto;
    grid-row: auto;
  }
  .proof-layout { grid-template-columns: 1fr 1fr; }
  .testimonial { grid-column: 1 / -1; }
  .proof-layout .image-card { grid-column: 1 / -1; }
  .application-row.reverse img { order: 0; }
  .application-row img { height: clamp(340px, 56vw, 520px); }
  .section-cta {
    grid-template-columns: 1fr;
  }
  .cta-action {
    justify-items: start;
    min-width: 0;
  }
}

@media (max-width: 640px) {
  :root { --container: min(100vw - 28px, 1160px); }
  .site-header {
    inset: 10px 10px auto;
    width: calc(100vw - 20px);
    gap: 8px;
  }
  .brand img { width: 96px; }
  .header-cta { display: none; }
  .hero { padding: 112px 14px 48px; }
  .hero .eyebrow {
    max-width: 310px;
    font-size: .66rem;
  }
  h1 { font-size: clamp(2.45rem, 11vw, 2.9rem); }
  .hero-subtitle {
    margin-top: 18px;
    font-size: .98rem;
  }
  .hero-actions { margin-top: 22px; }
  .hero-actions .btn { width: 100%; }
  .hero-proof {
    gap: 8px;
    margin-top: 22px;
  }
  .hero-proof li {
    padding: 8px 10px;
    font-size: .8rem;
  }
  .scroll-cue { display: none; }
  .section { padding: 76px 0; }
  h2 { font-size: clamp(2rem, 9vw, 2.45rem); }
  .section-heading { margin-bottom: 30px; }
  .metric { border-right: 0; border-bottom: 1px solid var(--line); }
  .feature-grid,
  .stone-grid,
  .timeline,
  .proof-layout,
  .lead-form { grid-template-columns: 1fr; }
  .masonry { display: grid; grid-template-columns: 1fr; grid-template-rows: none; grid-auto-rows: auto; }
  .gallery-section { padding-left: 14px; padding-right: 14px; }
  .product-copy,
  .product-card:not(.product-card-featured) .product-copy {
    padding: 22px;
  }
  .product-card a { padding-top: 18px; }
  .stone-card {
    grid-template-rows: auto 1fr;
    min-height: 0;
  }
  .stone-card img {
    height: auto;
    aspect-ratio: 16 / 9;
  }
  .stone-card div { padding: 20px; }
  .gallery-item, .gallery-item.wide, .gallery-item.tall {
    min-height: 0;
    height: auto;
    aspect-ratio: 4 / 3;
    grid-row: auto;
  }
  .application-row { padding: 14px; gap: 24px; }
  .application-row h3 {
    font-size: 1.45rem;
    line-height: 1.12;
  }
  .application-row img {
    min-height: 0;
    height: auto;
    aspect-ratio: 4 / 3;
  }
  .lead-form { padding: 16px; }
  .site-footer { padding: 46px 20px; }
  .section-cta {
    padding: 24px;
  }
  .cta-copy h3 {
    font-size: 1.65rem;
  }
  .section-cta .btn {
    width: 100%;
  }
  .cta-action {
    width: 100%;
  }
  .testimonial { min-height: 520px; }
  .testimonial p { font-size: 1.55rem; }
  .back-to-top { display: none; }
  .whatsapp-float {
    width: 54px;
    height: 54px;
    right: 14px;
    bottom: 16px;
    opacity: .92;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
  }
}