:root {
  --dark: #2D3B1A;
  --dark2: #1E2A10;
  --lime: #AACC00;
  --lime-dark: #7A9400;
  --lime-bg: #F0F5D8;
  --cream: #F7F7F1;
  --white: #FFFFFF;
  --ink: #16200C;
  --ink-soft: #3c4a2e;
  --gray: #6b7166;
  --amber: #A8760F;
  --amber-bg: #FBF3E1;
  --serif: 'Source Serif 4', Georgia, serif;
  --sans: 'Archivo', 'Helvetica Neue', Arial, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, monospace;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--serif);
  color: var(--ink);
  background: var(--white);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
h1, h2, h3 { font-family: var(--sans); margin: 0; letter-spacing: -0.01em; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 40px; }
.wrap-narrow { max-width: 780px; }

/* ---------- progress bar ---------- */
.progress-bar {
  position: fixed; top: 0; left: 0; height: 3px; width: 0%;
  background: var(--lime); z-index: 200; transition: width 0.1s linear;
}

/* ---------- header ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: transparent;
  transition: background 0.3s ease, box-shadow 0.3s ease, padding 0.3s ease;
  padding: 22px 0;
}
.site-header.scrolled {
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(8px);
  box-shadow: 0 1px 0 rgba(0,0,0,0.06);
  padding: 12px 0;
}
.header-inner { max-width: var(--max); margin: 0 auto; padding: 0 40px; display: flex; align-items: center; justify-content: space-between; }
.brand-logo { height: 34px; width: auto; transition: filter 0.3s; }
.site-header:not(.scrolled) .brand-logo { filter: brightness(0) invert(1); }
.main-nav { display: flex; align-items: center; gap: 30px; font-family: var(--sans); font-size: 14px; font-weight: 600; }
.main-nav a {
  text-decoration: none; color: var(--white); opacity: 0.88;
  transition: opacity 0.2s, color 0.3s;
}
.site-header.scrolled .main-nav a { color: var(--ink); }
.main-nav a:hover { opacity: 1; }
.main-nav a.nav-active:not(.nav-cta) { color: var(--lime) !important; opacity: 1; }
.nav-cta {
  background: var(--lime); color: var(--dark) !important; opacity: 1 !important;
  padding: 9px 18px; border-radius: 2px; font-weight: 700;
}
.nav-toggle { display: none; }

/* ---------- hero ---------- */
.hero { position: relative; height: 100vh; min-height: 600px; overflow: hidden; }
.hero-media { position: absolute; inset: 0; }
.hero-media img { width: 100%; height: 100%; object-fit: cover; }
.hero-scrim {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(20,26,10,0.55) 0%, rgba(20,26,10,0.25) 45%, rgba(20,26,10,0.75) 100%);
}
.hero-content {
  position: relative; z-index: 2; height: 100%;
  display: flex; flex-direction: column; justify-content: flex-end;
  max-width: var(--max); margin: 0 auto; padding: 0 40px 100px;
  color: var(--white);
}
.eyebrow {
  font-family: var(--sans); font-size: 13px; font-weight: 700; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--lime); margin: 0 0 18px;
}
.hero h1 {
  font-size: clamp(34px, 5.4vw, 62px); font-weight: 800; line-height: 1.08;
  margin: 0 0 22px; max-width: 780px;
}
.hero-sub { font-family: var(--serif); font-size: 19px; max-width: 520px; opacity: 0.92; margin: 0; }
.scroll-cue {
  position: absolute; bottom: 36px; left: 40px;
  width: 26px; height: 42px; border: 1.5px solid rgba(255,255,255,0.6); border-radius: 14px;
}
.scroll-cue span {
  position: absolute; top: 8px; left: 50%; width: 4px; height: 8px; margin-left: -2px;
  background: var(--lime); border-radius: 2px; animation: scrollcue 1.8s infinite;
}
@keyframes scrollcue { 0% { opacity:1; transform: translateY(0);} 70% {opacity:0; transform: translateY(14px);} 100% {opacity:0;} }

/* ---------- sections ---------- */
.section { padding: 120px 0; }
.section-dark { background: var(--dark); color: var(--white); }
.section-dark .prose p, .section-dark .lead, .section-dark .fine-note { color: rgba(255,255,255,0.78); }
.section-tint { background: var(--cream); }
.section-closing { background: var(--dark2); color: var(--white); padding: 130px 0; }

.kicker {
  display: inline-block; font-family: var(--sans); font-size: 12.5px; font-weight: 700;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--lime-dark); margin-bottom: 18px;
}
.section-dark .kicker, .kicker-light { color: var(--lime); }

h2 { font-size: clamp(26px, 3.4vw, 40px); font-weight: 700; line-height: 1.18; margin-bottom: 34px; max-width: 720px; }
h2.light { color: var(--white); }
h3 { font-size: 21px; font-weight: 700; margin-bottom: 16px; }

.lead { font-family: var(--serif); font-size: 19px; color: var(--ink-soft); max-width: 640px; margin: -12px 0 40px; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; }
.grid-gap-lg { gap: 64px; }
.align-center { align-items: center; }
.align-start  { align-items: start; }

.prose p, .prose-p { font-family: var(--serif); font-size: 17px; color: var(--ink-soft); margin: 0 0 18px; }
.light-p { color: rgba(255,255,255,0.82); }

.pull-quote {
  font-family: var(--sans); font-weight: 700; font-size: clamp(22px,2.6vw,30px);
  line-height: 1.3; max-width: 820px; margin: 56px 0 0; color: var(--white);
}
.section:not(.section-dark) .pull-quote { color: var(--dark); }

/* ---------- steps diagram ---------- */
.steps-diagram { display: flex; gap: 24px; }
.steps-col { flex: 1; background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.12); padding: 24px 22px; border-radius: 4px; }
.steps-col-accent { background: rgba(170,204,0,0.09); border-color: rgba(170,204,0,0.3); }
.steps-label { font-family: var(--sans); font-weight: 700; font-size: 13px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--lime); margin: 0 0 16px; }
.steps-list { list-style: none; margin: 0; padding: 0; counter-reset: step; }
.steps-list li {
  counter-increment: step; padding: 9px 0 9px 30px; position: relative;
  font-size: 15px; color: rgba(255,255,255,0.8); border-top: 1px solid rgba(255,255,255,0.08);
}
.steps-list li:first-child { border-top: none; }
.steps-list li::before {
  content: counter(step); position: absolute; left: 0; top: 9px;
  font-family: var(--mono); font-size: 12px; color: rgba(255,255,255,0.4);
}
.steps-highlight { color: var(--lime) !important; font-weight: 700; }

/* ---------- screw diagram ---------- */
.screw-diagram { text-align: center; }
.screw-photo-card {
  border-radius: 8px; overflow: hidden; max-width: 300px; margin: 0 auto;
  box-shadow: 0 18px 34px -18px rgba(0,0,0,0.35);
}
.screw-photo-card img { width: 100%; display: block; aspect-ratio: 3/4; object-fit: cover; }
.callout-text { font-family: var(--sans); font-size: 11px; font-weight: 700; letter-spacing: 0.04em; fill: var(--ink); }
.callout-amber { fill: var(--amber); }
.fig-caption { font-family: var(--sans); font-size: 12px; color: var(--gray); margin-top: 10px; }
.screw-diagram .fig-caption { max-width: 300px; margin-left: auto; margin-right: auto; text-align: left; }
.fig-caption-center { text-align: center; margin-top: 16px; margin-bottom: 0; }
.section-dark .fig-caption-center { color: rgba(255,255,255,0.5); }

.tech-principle { margin-top: 90px; padding-top: 60px; border-top: 1px solid #e6e6dc; }
.tech-principle h3 { font-size: 24px; max-width: 700px; }
.tech-principle p { font-family: var(--serif); font-size: 17px; color: var(--ink-soft); max-width: 700px; }
.param-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 18px; margin-top: 32px; }
.param {
  font-family: var(--sans); font-weight: 600; font-size: 14.5px; color: var(--ink);
  background: var(--lime-bg); border-radius: 4px; padding: 20px 16px;
}
.param-num { display: block; font-family: var(--mono); font-size: 12px; color: var(--lime-dark); margin-bottom: 8px; }

/* ---------- installation ---------- */
.driver-cards { display: flex; flex-direction: column; gap: 18px; }
.driver-card { background: var(--white); border: 1px solid #e6e6dc; border-radius: 6px; padding: 22px 24px; display: flex; gap: 18px; align-items: center; }
.driver-photo { width: 84px; height: 84px; flex-shrink: 0; border-radius: 6px; overflow: hidden; background: #eee; }
.driver-photo img { width: 100%; height: 100%; object-fit: cover; }
.driver-title { font-family: var(--sans); font-weight: 700; font-size: 15px; margin: 0 0 4px; }
.driver-torque { font-family: var(--sans); font-weight: 800; font-size: 26px; color: var(--dark); margin: 0 0 4px; }
.driver-torque span { font-size: 13px; font-weight: 600; color: var(--gray); }
.driver-desc { font-family: var(--serif); font-size: 14px; color: var(--ink-soft); margin: 0; }

.figure-wide { margin: 56px 0 0; }
.figure-wide img { border-radius: 6px; width: 100%; }
.figure-wide figcaption { font-family: var(--sans); font-size: 12.5px; color: var(--gray); margin-top: 10px; }

/* video feature */
.video-feature { margin: 56px 0 0; }
.video-feature video { width: 100%; display: block; border-radius: 8px; background: #000; }
.video-feature figcaption { font-family: var(--sans); font-size: 12.5px; color: var(--gray); margin-top: 10px; }

/* install steps strip */
.steps-heading { font-family: var(--sans); font-weight: 700; font-size: 20px; color: var(--lime-dark); margin: 56px 0 28px; }
.steps-strip { display: grid; grid-template-columns: repeat(5,1fr); gap: 22px; }
.step-card { display: flex; flex-direction: column; align-items: center; text-align: center; }
.step-photo {
  width: 96px; height: 96px; border-radius: 50%; overflow: hidden; flex-shrink: 0;
  border: 4px solid var(--white); box-shadow: 0 0 0 1px #d8dfc4, 0 8px 18px -10px rgba(0,0,0,0.3);
  position: relative; z-index: 1; margin-bottom: -48px;
}
.step-photo img { width: 100%; height: 100%; object-fit: cover; display: block; }
.step-body {
  background: var(--lime-dark); border-radius: 12px; padding: 60px 16px 22px;
  display: flex; flex-direction: column; align-items: center; flex: 1;
}
.step-title { font-family: var(--sans); font-weight: 800; font-size: 15px; color: var(--white); margin: 0 0 10px; letter-spacing: 0.01em; }
.step-desc { font-family: var(--serif); font-size: 13.5px; line-height: 1.5; color: rgba(255,255,255,0.92); margin: 0; }

/* application card grid */
.app-card-grid { display: grid; grid-template-columns: repeat(5,1fr); gap: 12px; margin-top: 10px; }
.app-card {
  position: relative;
  background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.1); border-radius: 8px;
  overflow: hidden; text-align: center; transition: border-color 0.2s;
}
.app-card:hover { border-color: var(--lime); }
.app-card img { width: 100%; aspect-ratio: 4/3; object-fit: cover; display: block; transition: transform 0.45s ease; filter: grayscale(1); }
.app-card:hover img { transform: scale(1.08); }
.app-card p { font-family: var(--sans); font-size: 12px; font-weight: 600; color: rgba(255,255,255,0.85); margin: 0; padding: 7px 8px; }
#aplicacoes { padding: 36px 0; }
#aplicacoes .kicker { margin-bottom: 4px; }
#aplicacoes h2 { margin-bottom: 14px; font-size: clamp(26px, 3vw, 36px); }
#aplicacoes .lead { font-size: 12px; line-height: 1.5; margin-bottom: 10px; white-space: nowrap; }
#aplicacoes .app-card-grid { margin-top: 6px; }
.app-card-own { position: relative; border-color: rgba(170,204,0,0.5); }
.app-card-own::before {
  content: 'SICLA'; position: absolute; top: 8px; left: 8px; z-index: 1;
  background: var(--lime); color: var(--dark); font-family: var(--sans); font-size: 9px; font-weight: 800;
  letter-spacing: 0.05em; padding: 3px 7px; border-radius: 3px;
}

/* ---------- real project gallery ---------- */
.obra-gallery { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 20px; margin-top: 40px; }
.obra-card { position: relative; border-radius: 8px; overflow: hidden; background: #eee; }
.obra-card img { width: 100%; height: 100%; aspect-ratio: 4/5; object-fit: cover; display: block; }
.obra-card-tall img { aspect-ratio: auto; height: 100%; }
.obra-card figcaption {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 20px 16px 14px;
  background: linear-gradient(180deg, rgba(0,0,0,0) 0%, rgba(0,0,0,0.65) 100%);
  color: var(--white); font-family: var(--sans); font-size: 13px; font-weight: 600;
}

/* ---------- benefits ---------- */
.benefit-cards {
  display: grid; grid-template-columns: repeat(3,1fr); gap: 48px 48px; margin-top: 64px;
}
.benefit-card {
  padding: 28px 0 8px; border-top: 2px solid var(--lime);
  display: flex; flex-direction: column; gap: 12px;
  transition: border-color 0.22s, transform 0.22s;
}
.benefit-card:hover { border-color: var(--dark); transform: translateY(-3px); }
.bc-header {
  display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 2px;
}
.bc-header svg {
  width: 26px; height: 26px; stroke: var(--dark); stroke-width: 1.5;
  fill: none; stroke-linecap: round; stroke-linejoin: round;
}
.bc-num {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.1em;
  color: var(--lime-dark); font-weight: 700;
}
.bc-title {
  font-family: var(--sans); font-size: 16.5px; font-weight: 700;
  color: var(--ink); line-height: 1.3;
}
.bc-desc {
  font-family: var(--serif); font-size: 14.5px; color: #5d5d4e; line-height: 1.65; margin: 0;
}

/* ---------- applications ---------- */
.fine-note { font-family: var(--sans); font-size: 13.5px; color: var(--gray); margin-top: 30px; }
.fine-note-light { color: rgba(255,255,255,0.55); }

/* ---------- tables ---------- */
.table-scroll { overflow-x: auto; margin-top: 12px; }
.data-table { width: 100%; border-collapse: collapse; font-family: var(--sans); font-size: 14.5px; min-width: 600px; }
.data-table th {
  background: var(--dark); color: var(--white); text-align: left; padding: 12px 16px;
  font-weight: 600; font-size: 12.5px; text-transform: uppercase; letter-spacing: 0.03em;
}
.data-table-dense th { text-align: center; padding: 10px 10px; font-size: 11.5px; }
.data-table-dense td { text-align: center; }
.data-table td { padding: 12px 16px; border-bottom: 1px solid #e6e6dc; }
.data-table tbody tr:nth-child(odd) { background: #FAFAF5; }
.mono { font-family: var(--mono); font-weight: 600; font-size: 13.5px; color: var(--dark); }

.note-box {
  background: var(--amber-bg); border-left: 3px solid var(--amber); padding: 18px 22px;
  margin-top: 22px; border-radius: 0 4px 4px 0;
}
.note-box p { margin: 0; font-family: var(--sans); font-size: 14px; color: #5c4a12; line-height: 1.6; }

/* ---------- soil ---------- */
.soil-block { margin-top: 80px; }
.soil-block h3 { white-space: nowrap; }
.soil-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; margin-top: 26px; }

/* flip cards */
.soil-card-flip { perspective: 900px; cursor: pointer; height: 160px; }
.soil-card-flip:hover .soil-card-front { box-shadow: 0 4px 16px rgba(0,0,0,0.10); }
.soil-card-inner {
  position: relative; width: 100%; height: 100%;
  transition: transform 0.55s cubic-bezier(.4,0,.2,1);
  transform-style: preserve-3d;
}
.soil-card-flip.is-flipped .soil-card-inner { transform: rotateY(180deg); }
.soil-card-front, .soil-card-back {
  position: absolute; inset: 0; border-radius: 6px; padding: 28px 24px;
  backface-visibility: hidden; -webkit-backface-visibility: hidden;
  display: flex; flex-direction: column; justify-content: center;
}
.soil-card-front {
  background: var(--lime-bg); align-items: center; justify-content: center;
  transition: box-shadow 0.2s;
}
.soil-card-front::after {
  content: '+'; position: absolute; bottom: 14px; right: 18px;
  font-family: var(--sans); font-size: 20px; font-weight: 300;
  color: var(--lime-dark); opacity: 0.6; line-height: 1;
}
.soil-card-back {
  background: var(--dark); color: #fff;
  transform: rotateY(180deg);
}
.soil-areia  .soil-card-front { background: #E8D49A; }
.soil-argila .soil-card-front { background: #D9A07C; }
.soil-rocha  .soil-card-front { background: #B4C0C6; }
.soil-name { font-family: var(--sans); font-weight: 700; font-size: 15px; margin: 0 0 8px; }
.soil-card-front .soil-name { color: var(--ink); font-size: 20px; text-transform: uppercase; letter-spacing: 0.04em; }
.soil-card-back .soil-name { color: var(--lime); margin-bottom: 12px; }
.soil-card-back p { font-family: var(--serif); font-size: 14px; color: rgba(255,255,255,0.82); margin: 0; line-height: 1.6; }

/* ---------- comparativo ---------- */
/* comparativo section background photo */
#comparativo { position: relative; padding: 48px 0; }
#comparativo::before {
  content: ''; position: absolute; inset: 0;
  background: url('assets/canada_house_install.jpg') center/cover no-repeat;
  opacity: 0.12; z-index: 0; pointer-events: none;
}
#comparativo .wrap { position: relative; z-index: 1; }

#comparativo h2 { margin-bottom: 16px; }
.compare-table { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: rgba(255,255,255,0.1); border-radius: 6px; overflow: hidden; margin-top: 10px; }
.compare-col { background: rgba(255,255,255,0.04); padding: 26px 30px; }
.compare-col-accent { background: rgba(170,204,0,0.08); }
.compare-head { font-family: var(--sans); font-weight: 700; font-size: 14px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--lime); margin: 0 0 16px; }

/* row entrance */
.compare-head,
.compare-row {
  font-family: var(--sans); font-size: 13px; padding: 5px 0;
  border-top: 1px solid rgba(255,255,255,0.08); margin: 0;
  color: rgba(255,255,255,0.85);
  opacity: 0; transform: translateY(10px);
  transition: opacity 0.4s ease, transform 0.4s ease;
  transition-delay: var(--rd, 0s);
}
.compare-head { border-top: none; margin: 0 0 10px; font-size: 12px; }
.compare-table.is-visible .compare-head,
.compare-table.is-visible .compare-row { opacity: 1; transform: translateY(0); }

/* strike — animated draw */
.compare-row.strike { color: rgba(255,255,255,0.28); position: relative; }
.compare-row.strike::after {
  content: ''; position: absolute;
  left: 0; top: 50%; height: 1.5px;
  background: rgba(255,255,255,0.45);
  width: 0;
  transition: width 0.38s ease;
  transition-delay: calc(var(--rd, 0s) + 0.25s);
}
.compare-table.is-visible .compare-row.strike::after { width: 100%; }

.compare-row.done { color: rgba(255,255,255,0.25); font-family: var(--mono); }
.compare-row.highlight { color: var(--lime); font-weight: 700; }

/* ---------- flange carousel ---------- */
.flange-intro { max-width: 680px; margin-bottom: 40px; }
.flange-intro h2 { margin-bottom: 16px; }

.flange-carousel-wrap {
  position: relative;
}

.flange-carousel {
  display: flex; gap: 12px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch; scrollbar-width: none;
  padding: 4px 0 16px;
}
.flange-carousel::-webkit-scrollbar { display: none; }

.carousel-btn {
  position: absolute; top: 40%; transform: translateY(-50%);
  width: 40px; height: 40px; border-radius: 50%;
  background: #fff; border: 1px solid #d8d8cc;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; z-index: 10;
  box-shadow: 0 2px 8px rgba(0,0,0,0.10);
  transition: background 0.18s, border-color 0.18s;
}
.carousel-btn:hover { background: var(--dark); border-color: var(--dark); }
.carousel-btn:hover svg { stroke: #fff; }
.carousel-btn svg { width: 18px; height: 18px; stroke: var(--dark); stroke-width: 2; fill: none; stroke-linecap: round; stroke-linejoin: round; }
.carousel-btn-prev { left: -16px; }
.carousel-btn-next { right: -16px; }
.flange-item {
  margin: 0; border-radius: 8px; overflow: hidden;
  border: 1px solid #e0dfd6; background: #fff;
  display: flex; flex-direction: column;
  flex: 0 0 220px;
}
.flange-item:hover { border-color: var(--lime); border-width: 2px; }
.flange-img-wrap { background: #fff; padding: 12px; }
.flange-img-wrap img { width: 100%; display: block; aspect-ratio: 1; object-fit: contain; }
.flange-item figcaption {
  padding: 10px 12px 12px; font-family: var(--sans); font-size: 12px;
  color: var(--gray); border-top: 1px solid #f0efe8; line-height: 1.5;
}
.flange-item figcaption strong {
  display: block; font-size: 13px; font-weight: 700; color: var(--ink); margin-bottom: 1px;
}
.flange-badge {
  font-family: var(--mono); font-size: 9px; letter-spacing: 0.08em;
  color: var(--lime-dark); font-weight: 700; text-transform: uppercase;
}

/* ---------- FAQ ---------- */
.accordion { border-top: 1px solid #e6e6dc; margin-top: 10px; }
.acc-item { border-bottom: 1px solid #e6e6dc; }
.acc-trigger {
  width: 100%; text-align: left; background: none; border: none; cursor: pointer;
  font-family: var(--sans); font-weight: 600; font-size: 17px; color: var(--ink);
  padding: 24px 0; display: flex; justify-content: space-between; align-items: center; gap: 20px;
}
.acc-plus { position: relative; width: 16px; height: 16px; flex-shrink: 0; }
.acc-plus::before, .acc-plus::after {
  content: ''; position: absolute; background: var(--lime-dark); border-radius: 1px;
}
.acc-plus::before { width: 16px; height: 2px; top: 7px; left: 0; }
.acc-plus::after { width: 2px; height: 16px; top: 0; left: 7px; transition: transform 0.25s; }
.acc-item.open .acc-plus::after { transform: rotate(90deg); opacity: 0; }
.acc-panel { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
.acc-item.open .acc-panel { max-height: 220px; }
.acc-panel p { font-family: var(--serif); font-size: 15.5px; color: var(--ink-soft); margin: 0 0 24px; max-width: 680px; }

/* ---------- campo ---------- */
.field-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; margin-top: 10px; }
.field-grid img { border-radius: 6px; width: 100%; aspect-ratio: 1/1; object-fit: cover; }
.field-grid figcaption { font-family: var(--sans); font-size: 12.5px; color: var(--gray); margin-top: 10px; }

/* ---------- closing ---------- */
.cert-logos {
  display: flex; gap: 12px; align-items: flex-start; flex-wrap: nowrap;
  margin: 32px 0 40px; padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.16);
}
.cert-logo-item { display: flex; flex-direction: column; align-items: center; gap: 8px; margin: 0; }
.cert-logo-item figcaption {
  font-family: var(--mono); font-size: 9px; letter-spacing: 0.06em;
  color: rgba(255,255,255,0.38); text-transform: uppercase; text-align: center; max-width: 130px;
}
.cert-img {
  display: block; height: auto; width: auto; max-height: 56px;
  filter: brightness(0) invert(1); opacity: 0.88;
}
.cert-img-iso  { max-height: 60px; }
.cert-img-astm { max-height: 44px; }
.cert-img-en   { max-height: 60px; }
.cert-img-icc  { max-height: 48px; }
.btn-primary {
  display: inline-block; background: var(--lime); color: var(--dark); text-decoration: none;
  font-family: var(--sans); font-weight: 700; font-size: 14.5px; padding: 16px 30px; border-radius: 2px;
  transition: background 0.2s;
}
.btn-primary:hover { background: #bfe000; }
.closing-photo img { border-radius: 6px; width: 100%; }
.closing-photo figcaption { font-family: var(--sans); font-size: 12.5px; color: rgba(255,255,255,0.5); margin-top: 10px; }

/* ---------- footer ---------- */
.site-footer { background: var(--dark2); padding: 40px 0; }
.footer-inner { display: flex; align-items: center; gap: 18px; }
.footer-logo { height: 22px; opacity: 0.85; }
.footer-inner p { font-family: var(--sans); font-size: 13px; color: rgba(255,255,255,0.5); margin: 0; }

/* ---------- reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in { opacity: 1; transform: translateY(0); }

/* =============================================
   PRODUCT TECHNICAL SHEET
   ============================================= */
.prod-header {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  background: var(--dark);
  border-radius: 8px;
  padding: 22px 28px;
  margin: 32px 0 40px;
}
.prod-header-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  padding-top: 4px;
}
.prod-header-tag {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--lime);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  white-space: nowrap;
}
.prod-header-title {
  font-family: var(--sans);
  font-size: 19px;
  font-weight: 700;
  color: var(--white);
  margin: 0 0 10px;
  letter-spacing: -0.01em;
  text-transform: uppercase;
}
.prod-header-desc {
  font-family: var(--serif);
  font-size: 14px;
  color: rgba(255,255,255,0.68);
  line-height: 1.6;
  margin: 0;
}

.prod-sheet {
  display: grid;
  grid-template-columns: 310px 1fr;
  gap: 48px;
  align-items: start;
}

/* Diagram */
.prod-diag { position: sticky; top: 80px; }
.prod-diag-svg {
  width: 100%;
  height: auto;
  background: var(--cream);
  border: 1px solid #e0e0d4;
  border-radius: 8px;
  padding: 12px 4px;
  display: block;
}

/* Table column */
.prod-table-col {}
.prod-table-note {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--lime-dark);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0 0 12px;
}
.prod-col-key {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--dark);
  color: var(--lime);
  font-size: 10px;
  font-weight: 700;
  margin-right: 4px;
  vertical-align: middle;
}
.prod-spec-table th { white-space: nowrap; }
.prod-inch {
  color: var(--gray);
  font-size: 12px;
}

/* Accessories section */
.prod-accessories {
  margin-top: 28px;
  border-top: 1px solid #e0e4d8;
  padding-top: 20px;
}
.prod-acc-title {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--gray);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0 0 14px;
}
.prod-acc-row {
  display: grid;
  grid-template-columns: 76px 1fr auto;
  gap: 12px;
  align-items: baseline;
  padding: 8px 0;
  border-bottom: 1px solid #eeeeea;
  font-family: var(--serif);
  font-size: 13.5px;
  color: var(--ink-soft);
}
.prod-acc-row:last-child { border-bottom: none; }
.prod-acc-row .mono { color: var(--dark); font-weight: 600; font-size: 13px; }
.prod-acc-row span:last-child { color: var(--gray); font-size: 11.5px; text-align: right; white-space: nowrap; }

/* =============================================
   CROSS-SECTION DIAGRAM
   ============================================= */
.cs-diagram {
  position: relative;
  width: 100%;
  height: 560px;
  overflow: hidden;
  margin: 56px 0 0;
}

/* Above-ground zone */
.cs-surface {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 44%;
  background: linear-gradient(180deg, #e8edd8 0%, #dfe8c8 100%);
  z-index: 1;
}

/* Wavy grass SVG */
.cs-grass-svg {
  position: absolute;
  top: calc(44% - 26px);
  left: 0; right: 0;
  height: 52px;
  z-index: 3;
  pointer-events: none;
}
.cs-grass-svg svg { width: 100%; height: 100%; }

/* Underground zone */
.cs-underground {
  position: absolute;
  top: 44%; left: 0; right: 0; bottom: 0;
  display: flex;
  z-index: 1;
}
.cs-soil {
  flex: 1;
  position: relative;
  background: #2a1f10;
  background-image:
    radial-gradient(ellipse 80px 50px at 18% 35%, rgba(56,42,18,0.7) 0%, transparent 70%),
    radial-gradient(ellipse 60px 40px at 72% 60%, rgba(44,32,12,0.6) 0%, transparent 70%),
    radial-gradient(ellipse 50px 35px at 40% 80%, rgba(64,50,22,0.5) 0%, transparent 70%);
}
.cs-rock {
  flex: 1;
  position: relative;
  background: #5e5e5e;
  background-image:
    repeating-linear-gradient(-38deg, transparent, transparent 14px, rgba(0,0,0,0.07) 14px, rgba(0,0,0,0.07) 15px),
    repeating-linear-gradient(52deg, transparent, transparent 22px, rgba(255,255,255,0.04) 22px, rgba(255,255,255,0.04) 23px),
    linear-gradient(170deg, #686868 0%, #555 30%, #686868 60%, #545454 100%);
}
.cs-zone-label {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--sans);
  font-size: 54px;
  font-weight: 800;
  letter-spacing: -0.02em;
  pointer-events: none;
  user-select: none;
  white-space: nowrap;
}
.cs-soil .cs-zone-label { color: rgba(255,255,255,0.06); }
.cs-rock .cs-zone-label { color: rgba(255,255,255,0.09); }

/* Screw centered column */
.cs-screw-col {
  position: absolute;
  top: 0; bottom: 0;
  left: calc(50% - 70px);
  width: 140px;
  z-index: 4;
  overflow: visible;
  pointer-events: none;
}
.cs-screw-img {
  width: 140px;
  height: auto;
  display: block;
  transform: translateY(-65px);
  transition: transform 2s cubic-bezier(0.15, 0.0, 0.0, 1.0);
  filter: drop-shadow(0 8px 24px rgba(0,0,0,0.55)) drop-shadow(0 2px 6px rgba(0,0,0,0.3));
}
.cs-diagram.cs-animate .cs-screw-img {
  transform: translateY(90px);
}

/* Callout positioning wrappers — anchored next to screw, vertically centered */
.cs-callout-pos {
  position: absolute;
  z-index: 5;
  display: flex;
  align-items: center;
  width: 340px;
  transform: translateY(-50%);
}
/* left callouts: right edge stops at screw's left side → dot stays in soil zone */
.cs-ul { top: 22%;  right: calc(50% + 70px + 16px); left: auto; }
.cs-ll { top: 68%;  right: calc(50% + 70px + 16px); left: auto; }
/* right callouts: left edge starts at screw's right side */
.cs-ur { top: 22%;  left: calc(50% + 70px + 16px); right: auto; }
.cs-lr { top: 68%;  left: calc(50% + 70px + 16px); right: auto; }

/* Callout reveal animation */
.cs-callout {
  display: flex;
  align-items: center;
  width: 100%;
  gap: 0;
  opacity: 0;
  transition: opacity 0.55s ease var(--cs-delay, 0s), transform 0.55s ease var(--cs-delay, 0s);
}
.cs-cl { transform: translateX(-18px); flex-direction: row; }
.cs-cr { transform: translateX(18px);  flex-direction: row; }
.cs-diagram.cs-animate .cs-callout {
  opacity: 1;
  transform: translateX(0);
}

/* Callout card */
.cs-card {
  background: rgba(255,255,255,0.96);
  border-radius: 6px;
  padding: 11px 14px;
  max-width: 200px;
  flex-shrink: 0;
  box-shadow: 0 4px 18px rgba(0,0,0,0.18);
}
.cs-card-dark {
  background: rgba(28,40,14,0.92);
}
.cs-card strong {
  display: block;
  font-family: var(--sans);
  font-size: 11.5px;
  font-weight: 700;
  color: var(--dark);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}
.cs-card-dark strong { color: var(--lime); }
.cs-card span {
  font-family: var(--serif);
  font-size: 12px;
  color: #555;
  line-height: 1.45;
}
.cs-card-dark span { color: rgba(255,255,255,0.75); }

/* Connector line + dot */
.cs-cx { display: flex; align-items: center; flex: 1; }
.cs-cline { flex: 1; height: 1px; background: rgba(170,204,0,0.55); }
.cs-cdot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--lime);
  flex-shrink: 0;
}

/* 4 benefit blocks */
.cs-benefits {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 40px;
  padding-bottom: 8px;
}
.cs-benefit {
  background: var(--cream);
  border: 1px solid #e4e8da;
  border-radius: 8px;
  padding: 22px 18px 20px;
  text-align: center;
}
.cs-bicon {
  width: 44px; height: 44px;
  background: var(--lime-bg);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 12px;
  color: var(--dark);
}
.cs-bicon svg { width: 22px; height: 22px; }
.cs-benefit strong {
  display: block;
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 5px;
}
.cs-benefit span {
  font-family: var(--serif);
  font-size: 12.5px;
  color: var(--gray);
  line-height: 1.45;
}

/* ---------- engenharia stat blocks ---------- */
.eng-stats {
  display: grid; grid-template-columns: repeat(3,1fr); gap: 2px;
  margin: 40px 0 28px; border: 1px solid #e6e6dc; border-radius: 8px; overflow: hidden;
}
.eng-stat {
  padding: 36px 32px; background: var(--cream);
  border-top: 3px solid var(--lime);
  display: flex; flex-direction: column; gap: 4px;
}
.eng-stat-num {
  font-family: var(--sans); font-size: clamp(28px, 3vw, 42px);
  font-weight: 800; color: var(--dark); line-height: 1; letter-spacing: -0.02em;
}
.eng-stat-unit {
  font-family: var(--mono); font-size: 13px; font-weight: 600;
  color: var(--lime-dark); margin-bottom: 10px;
}
.eng-stat-label {
  font-family: var(--sans); font-size: 13px; font-weight: 600;
  color: var(--ink); line-height: 1.5; margin: 0;
}
.eng-stat-label em { font-style: normal; color: var(--gray); font-weight: 400; }
@media (max-width: 880px) { .eng-stats { grid-template-columns: 1fr; } }

/* ---------- especificacao CTA ---------- */
#especificacao { position: relative; }
#especificacao::before {
  content: ''; position: absolute; inset: 0;
  background: url('assets/hero-screws.jpg') center/cover no-repeat;
  opacity: 0.10; z-index: 0; pointer-events: none;
}
#especificacao .wrap { position: relative; z-index: 1; }

.cta-chips {
  display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-bottom: 36px;
}
.cta-chips span {
  font-family: var(--sans); font-size: 13px; font-weight: 600;
  color: rgba(255,255,255,0.85); border: 1px solid rgba(255,255,255,0.22);
  border-radius: 100px; padding: 7px 18px;
}

/* ---------- whatsapp fab ---------- */
.whatsapp-fab {
  position: fixed; bottom: 28px; right: 28px; z-index: 150;
  width: 56px; height: 56px; border-radius: 50%;
  background: #25D366;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 16px rgba(0,0,0,0.22);
  transition: transform 0.2s, box-shadow 0.2s;
}
.whatsapp-fab:hover { transform: scale(1.08); box-shadow: 0 6px 22px rgba(0,0,0,0.3); }
.whatsapp-fab svg { width: 30px; height: 30px; fill: #fff; }

/* ---------- responsive ---------- */
@media (max-width: 880px) {
  .wrap { padding: 0 24px; }
  .header-inner { padding: 0 24px; }
  .main-nav {
    position: fixed; top: 0; right: 0; bottom: 0; width: 78vw; max-width: 320px;
    background: var(--dark); flex-direction: column; align-items: flex-start; justify-content: center;
    gap: 26px; padding: 40px; transform: translateX(100%); transition: transform 0.3s ease;
  }
  .main-nav.open { transform: translateX(0); }
  .main-nav a { color: var(--white) !important; font-size: 18px; }
  .nav-toggle {
    display: flex; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer;
    z-index: 101; padding: 6px;
  }
  .nav-toggle span { width: 22px; height: 2px; background: var(--white); }
  .site-header.scrolled .nav-toggle span { background: var(--ink); }
  .grid-2 { grid-template-columns: 1fr; gap: 40px; }
  .steps-diagram { flex-direction: column; }
  .param-grid { grid-template-columns: repeat(2,1fr); }
  .benefit-cards { grid-template-columns: 1fr; gap: 0; }
  .benefit-card { padding: 24px 0; }
  .field-grid { grid-template-columns: 1fr; }
  .soil-grid { grid-template-columns: 1fr; }
  .steps-strip { grid-template-columns: 1fr; gap: 56px 0; max-width: 320px; margin: 0 auto; }
  .app-card-grid { grid-template-columns: repeat(3,1fr); }
  .obra-gallery { grid-template-columns: 1fr; }
  .obra-card-tall img { aspect-ratio: 4/5; }
  .driver-card { flex-direction: column; align-items: flex-start; }
  .compare-table { grid-template-columns: 1fr; }
  .section { padding: 80px 0; }
  .hero-content { padding-bottom: 70px; }
  /* product sheet mobile */
  .prod-sheet { grid-template-columns: 1fr; }
  .prod-diag { position: static; }
  .prod-diag-svg { max-width: 260px; margin: 0 auto; }
  .prod-acc-row { grid-template-columns: 70px 1fr; }
  .prod-acc-row span:last-child { display: none; }
  /* cross-section mobile */
  .cs-diagram { height: 420px; margin-top: 40px; }
  .cs-ul, .cs-ur, .cs-ll, .cs-lr { display: none; }
  .cs-zone-label { font-size: 32px; }
  .cs-benefits { grid-template-columns: repeat(2, 1fr); }
  .cs-screw-img { width: 90px; }
  .cs-screw-col { left: calc(50% - 45px); width: 90px; }
}