/* ==========================================================================
   GESSO DESIGN — ARACAJU/SE
   Architectural & Technical Design System inspired by Heron AI (heronaiapp.com)
   ========================================================================== */

:root {
  /* Core Palette (logo Gesso Design: verde-oliva, verde-sálvia e grafite) */
  --cl-bg: #f6f7ef;
  --cl-bg-elevated: #fafbf4;
  --cl-bg-panel: #eef0e8;
  --cl-bg-dark: #2b2d2e;
  --content--primary: #333536;
  --content--secondary: #414140;
  --content--tertiary: rgba(51, 53, 54, 0.72);
  --content--surface: #72726f;
  --content--granite: #626260;
  --content--disable: #b4b4b0;
  --content--border: #b6bab0;
  --content--border-subtle: rgba(182, 186, 176, 0.45);
  --content--brand: #5f7026;
  --content--brand-hover: #4b5a1e;
  --content--brand-soft: rgba(95, 112, 38, 0.08);
  --content--brand-light: #9bb04a;
  --content--sage: #899d84;
  --content--white: #ffffff;
  --content--ok: #1f7a4c;

  /* Typography */
  --font-sans: 'Space Grotesk', 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Geist Mono', ui-monospace, monospace;

  /* Structural Grid & Sizing */
  --size--border: 1px;
  --container-max: 100%;
  --header-height: 68px;
  --ease-out-expo: cubic-bezier(0.23, 1, 0.32, 1);
  --ease-in-out: cubic-bezier(0.625, 0.05, 0, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  background-color: var(--cl-bg);
  color: var(--content--primary);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
  overflow-x: clip;
  -webkit-tap-highlight-color: transparent;
}

html::selection,
*::selection {
  background-color: var(--content--brand-hover);
  color: var(--content--white);
}

body {
  background-color: var(--cl-bg);
  color: var(--content--primary);
  min-height: 100vh;
  position: relative;
  overflow-x: clip;
  /* Subtle architectural blueprint dot-matrix + paper grain feel */
  background-image:
    radial-gradient(rgba(51, 53, 54, 0.11) 1px, transparent 1px),
    radial-gradient(rgba(95, 112, 38, 0.03) 1px, transparent 1px);
  background-size: 24px 24px, 96px 96px;
  background-position: 0 0, 12px 12px;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  outline: none;
}

button {
  cursor: pointer;
}

button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

:is(a, button, input, select, textarea, summary, [tabindex]):focus-visible {
  outline: 2px solid #2b2d2e;
  outline-offset: 2px;
  box-shadow: 0 0 0 4px #fff;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1000;
  padding: 0.75rem 1rem;
  background-color: #fff;
  color: #2b2d2e;
  font-weight: 600;
  transform: translateY(-200%);
}

.skip-link:focus {
  transform: translateY(0);
}

.privacy-note {
  font-family: var(--font-body);
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--content--secondary);
}

input:invalid:not(:placeholder-shown) {
  outline: 1px solid #a33a2b;
  outline-offset: 2px;
}

/* ==========================================================================
   ARCHITECTURAL GRID LINES, DASHES & CORNER BRACKETS (Heron AI Signature)
   ========================================================================== */

.page-frame {
  width: 100%;
  max-width: 100%;
  margin: 0;
  border-left: none;
  border-right: none;
  position: relative;
  background-color: rgba(246, 247, 239, 0.86);
}

.section-block {
  position: relative;
  border-top: var(--size--border) solid var(--content--border);
  border-bottom: var(--size--border) solid var(--content--border);
  margin-top: clamp(3rem, 5vw, 5.25rem);
  background-color: rgba(246, 247, 239, 0.94);
  scroll-margin-top: calc(var(--header-height) + 1.25rem);
}

.section-block.hero-section {
  margin-top: 0;
  border-top: none;
}

.line-dash-h {
  height: 1px;
  width: 100%;
  background-image: linear-gradient(to right, var(--content--border) 50%, transparent 50%);
  background-size: 12px 1px;
  background-repeat: repeat-x;
}

.line-dash-v {
  width: 1px;
  height: 100%;
  background-image: linear-gradient(to bottom, var(--content--border) 50%, transparent 50%);
  background-size: 1px 12px;
  background-repeat: repeat-y;
}

/* Corner Crosshair (+) Marker */
.crosshair {
  position: absolute;
  width: 11px;
  height: 11px;
  pointer-events: none;
  z-index: 5;
}
.crosshair::before,
.crosshair::after {
  content: '';
  position: absolute;
  background-color: var(--content--primary);
}
.crosshair::before {
  top: 5px;
  left: 0;
  width: 11px;
  height: 1px;
}
.crosshair::after {
  left: 5px;
  top: 0;
  width: 1px;
  height: 11px;
}
.crosshair.tl { top: -6px; left: -6px; }
.crosshair.tr { top: -6px; right: -6px; }
.crosshair.bl { bottom: -6px; left: -6px; }
.crosshair.br { bottom: -6px; right: -6px; }

/* Corner L-Bracket Ticks */
.corner-tick {
  position: absolute;
  width: 7px;
  height: 7px;
  pointer-events: none;
  transition: transform 0.35s var(--ease-out-expo), border-color 0.35s ease;
}
.corner-tick.tl {
  top: 6px;
  left: 6px;
  border-top: 1.5px solid currentColor;
  border-left: 1.5px solid currentColor;
}
.corner-tick.tr {
  top: 6px;
  right: 6px;
  border-top: 1.5px solid currentColor;
  border-right: 1.5px solid currentColor;
}
.corner-tick.bl {
  bottom: 6px;
  left: 6px;
  border-bottom: 1.5px solid currentColor;
  border-left: 1.5px solid currentColor;
}
.corner-tick.br {
  bottom: 6px;
  right: 6px;
  border-bottom: 1.5px solid currentColor;
  border-right: 1.5px solid currentColor;
}

/* Monospace Utility Tags */
.mono-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.2;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--content--secondary);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.mono-tag .dot {
  flex-shrink: 0;
  width: 6px;
  height: 6px;
  background-color: var(--content--brand);
  display: inline-block;
}

.mono-tag .dot.pulse {
  animation: pulseDot 1.8s infinite ease-in-out;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.35; transform: scale(0.8); }
}

.coord-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--content--surface);
  letter-spacing: 0.04em;
}

/* ==========================================================================
   HERON AI SIGNATURE BUTTON (.btn-heron)
   Features dual-layer vertical text roll + horizontal arrow slide + 5-tick divider
   ========================================================================== */

.btn-heron {
  max-width: 100%;
  min-height: 44px;
  position: relative;
  display: inline-flex;
  align-items: stretch;
  background-color: var(--content--brand);
  color: var(--content--white);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border: 1px solid var(--content--brand);
  overflow: hidden;
  transition: border-color 0.4s var(--ease-out-expo), color 0.4s var(--ease-out-expo);
  user-select: none;
}

.btn-heron::after {
  content: '';
  position: absolute;
  inset: 0;
  background-color: var(--content--primary);
  transform: translateY(102%);
  transition: transform 0.48s var(--ease-out-expo);
  z-index: 0;
}

.btn-heron:hover {
  border-color: var(--content--primary);
}

.btn-heron:hover::after {
  transform: translateY(0%);
}

/* Outline Variant */
.btn-heron.btn-outline {
  background-color: transparent;
  color: var(--content--primary);
  border-color: var(--content--border);
}

.btn-heron.btn-outline::after {
  background-color: var(--content--primary);
}

.btn-heron.btn-outline:hover {
  color: var(--content--white);
  border-color: var(--content--primary);
}

/* Dark Primary Variant */
.btn-heron.btn-dark {
  background-color: var(--content--primary);
  color: var(--content--white);
  border-color: var(--content--primary);
}

.btn-heron.btn-dark::after {
  background-color: var(--content--brand);
}

.btn-heron.btn-dark:hover {
  border-color: var(--content--brand);
}

.btn-heron-label {
  flex: 1;
  min-width: 0;
  position: relative;
  z-index: 1;
  padding: 0.9rem 1.35rem;
  overflow: hidden;
  display: flex;
  align-items: center;
}

.btn-heron-label-stack {
  position: relative;
  display: block;
  overflow: hidden;
  line-height: 1.2;
}

.btn-heron-label-top,
.btn-heron-label-bot {
  display: block;
  transition: transform 0.48s var(--ease-out-expo);
  white-space: normal;
  overflow-wrap: anywhere;
}

.btn-heron-label-bot {
  width: 100%;
  position: absolute;
  top: 0;
  left: 0;
  transform: translateY(110%);
}

.btn-heron:hover .btn-heron-label-top {
  transform: translateY(-110%);
}

.btn-heron:hover .btn-heron-label-bot {
  transform: translateY(0%);
}

/* Heron AI's signature 5-segment vertical perforated divider inside button icon */
.btn-heron-icon {
  flex-shrink: 0;
  position: relative;
  z-index: 1;
  width: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.btn-heron-icon::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  width: 1px;
  height: calc(100% - 10px);
  transform: translateY(-50%);
  background:
    linear-gradient(currentColor 0 0) top center / 1px 6px no-repeat,
    linear-gradient(currentColor 0 0) center 28% / 1px 2px no-repeat,
    linear-gradient(currentColor 0 0) center / 1px 6px no-repeat,
    linear-gradient(currentColor 0 0) center 72% / 1px 2px no-repeat,
    linear-gradient(currentColor 0 0) bottom center / 1px 6px no-repeat;
  opacity: 0.65;
}

.btn-heron-icon-track {
  position: relative;
  width: 18px;
  height: 18px;
  overflow: hidden;
}

.btn-heron-icon-top,
.btn-heron-icon-bot {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.48s var(--ease-out-expo);
}

.btn-heron-icon-bot {
  transform: translateX(-120%);
}

.btn-heron:hover .btn-heron-icon-top {
  transform: translateX(120%);
}

.btn-heron:hover .btn-heron-icon-bot {
  transform: translateX(0%);
}

/* ==========================================================================
   HEADER & ARCHITECTURAL NAVIGATION
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(246, 247, 239, 0.98);
  border-bottom: var(--size--border) solid var(--content--border);
  transition: transform 0.4s var(--ease-out-expo);
}

.header-container {
  width: 100%;
  max-width: 100%;
  margin: 0;
  height: var(--header-height);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: stretch;
  border-left: none;
  border-right: none;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0 1.5rem;
  border-right: var(--size--border) solid var(--content--border);
  position: relative;
  transition: background-color 0.3s ease;
}

.brand-logo:hover {
  background-color: var(--cl-bg-elevated);
}

.brand-logo-img {
  display: block;
  height: 46px;
  width: auto;
}

.brand-logo-mark {
  width: 32px;
  height: 36px;
  color: var(--content--primary);
  flex-shrink: 0;
  transition: transform 0.4s var(--ease-out-expo);
}

.brand-logo:hover .brand-logo-mark {
  transform: scale(1.05);
}

.brand-logo-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--content--primary);
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  color: var(--content--surface);
  margin-top: 3px;
}

.header-status {
  display: flex;
  align-items: center;
  padding: 0 1.25rem;
  gap: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--content--secondary);
}

.header-nav {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: 0.5rem;
}

.nav-item {
  position: relative;
  display: flex;
  align-items: center;
  padding: 0 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--content--primary);
  overflow: hidden;
  transition: color 0.3s ease, background-color 0.3s ease;
}

.nav-item .nav-text-wrap {
  position: relative;
  overflow: hidden;
  display: block;
}

.nav-item .nav-t1,
.nav-item .nav-t2 {
  display: block;
  transition: transform 0.4s var(--ease-out-expo);
}

.nav-item .nav-t2 {
  position: absolute;
  top: 0;
  left: 0;
  transform: translateY(110%);
  color: var(--content--brand);
}

.nav-item:hover .nav-t1 {
  transform: translateY(-110%);
}

.nav-item:hover .nav-t2 {
  transform: translateY(0%);
}

.nav-item .corner-tick {
  opacity: 0;
  transform: scale(0.6);
  color: var(--content--brand);
}

.nav-item:hover .corner-tick {
  opacity: 1;
  transform: scale(1);
}

.header-cta-wrap {
  display: flex;
  align-items: center;
  padding: 0 1rem;
}

.mobile-menu-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0 1.25rem;
  border-left: var(--size--border) solid var(--content--border);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
}

/* ==========================================================================
   HERO SECTION (Inspired by Heron AI's Interactive CAD Ruler + Model Canvas)
   ========================================================================== */

.hero-ruler-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 36px;
  padding: 0 1.25rem;
  border-bottom: var(--size--border) solid var(--content--border);
  background-color: var(--cl-bg-panel);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--content--surface);
  overflow: hidden;
  user-select: none;
}

.ruler-ticks {
  display: flex;
  align-items: flex-end;
  gap: 24px;
  height: 100%;
  flex: 1;
  overflow: hidden;
  mask-image: linear-gradient(to right, transparent, black 5%, black 95%, transparent);
}

.ruler-tick {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  height: 100%;
  padding-bottom: 4px;
  position: relative;
}

.ruler-tick::after {
  content: '';
  width: 1px;
  height: 6px;
  background-color: var(--content--border);
  margin-top: 2px;
}

.ruler-tick.major::after {
  height: 10px;
  background-color: var(--content--primary);
}

.hero-coords-live {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-left: 1rem;
  border-left: var(--size--border) solid var(--content--border);
  height: 100%;
  white-space: nowrap;
  color: var(--content--primary);
}

.hero-coords-live strong {
  color: var(--content--brand);
  font-weight: 600;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 1.15fr;
  min-height: calc(100vh - var(--header-height) - 36px);
}

/* Left Column: Architectural Typography & Value Proposition */
.hero-content-col {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border-right: var(--size--border) solid var(--content--border);
  position: relative;
  overflow: hidden;
}

/* Marca d'água: cubo da logo atrás do texto do hero */
.hero-content-col::before {
  content: '';
  position: absolute;
  right: -90px;
  bottom: -70px;
  width: clamp(320px, 38vw, 600px);
  aspect-ratio: 1;
  background: url('./assets/logo-mark.webp') center / contain no-repeat;
  opacity: 0.09;
  pointer-events: none;
}

.hero-content-col > * {
  position: relative;
  z-index: 1;
}

.hero-top-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 2rem;
  border-bottom: 1px dashed var(--content--border);
}

.hero-main-copy {
  padding: 3rem 2rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--content--border);
  background-color: var(--cl-bg-elevated);
  margin-bottom: 1.5rem;
  width: fit-content;
}

.hero-title {
  font-family: var(--font-sans);
  font-size: clamp(2.35rem, 4.3vw, 4.25rem);
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: -0.035em;
  text-transform: uppercase;
  color: var(--content--primary);
  margin-bottom: 1.5rem;
}

.hero-title .accent-word {
  color: var(--content--brand);
  position: relative;
  display: inline-block;
}

.hero-title .blueprint-box {
  display: inline-block;
  border: 1px dashed var(--content--brand);
  background-color: var(--content--brand-soft);
  padding: 0 0.25em;
  position: relative;
}

.hero-description {
  font-size: clamp(1rem, 1.15vw, 1.15rem);
  line-height: 1.6;
  color: var(--content--secondary);
  max-width: 54ch;
  margin-bottom: 2.25rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}

/* Bottom 3-Pillar Strip inside Hero Left Column (Just like Heron AI's "Faster iterations | Fewer mistakes | Less busywork") */
.hero-pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: var(--size--border) solid var(--content--border);
}

.hero-pillar-item {
  padding: 1.25rem 1.35rem;
  border-right: var(--size--border) solid var(--content--border);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  transition: background-color 0.3s ease;
}

.hero-pillar-item:last-child {
  border-right: none;
}

.hero-pillar-item:hover {
  background-color: var(--cl-bg-elevated);
}

.hero-pillar-num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--content--brand);
}

.hero-pillar-title {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--content--primary);
}

.hero-pillar-desc {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--content--surface);
}

/* Right Column: Interactive Architectural CAD / Drywall Blueprint Canvas */
.hero-canvas-col {
  position: relative;
  background-color: #eceee4;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
  cursor: crosshair;
}

/* Blueprint subtle grid inside canvas */
.hero-canvas-col::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(51, 53, 54, 0.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(51, 53, 54, 0.06) 1px, transparent 1px);
  background-size: 36px 36px;
  pointer-events: none;
}

/* Interactive cursor crosshair lines (Heron AI signature) */
.canvas-cursor-h,
.canvas-cursor-v {
  position: absolute;
  pointer-events: none;
  z-index: 4;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.hero-canvas-col:hover .canvas-cursor-h,
.hero-canvas-col:hover .canvas-cursor-v {
  opacity: 1;
}

.canvas-cursor-h {
  top: 0;
  left: 0;
  will-change: transform;
  right: 0;
  height: 1px;
  background-image: linear-gradient(to right, var(--content--brand) 50%, transparent 50%);
  background-size: 8px 1px;
}

.canvas-cursor-v {
  left: 0;
  top: 0;
  will-change: transform;
  bottom: 0;
  width: 1px;
  background-image: linear-gradient(to bottom, var(--content--brand) 50%, transparent 50%);
  background-size: 1px 8px;
}

.canvas-toolbar {
  position: relative;
  z-index: 6;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px dashed var(--content--border);
  background-color: rgba(246, 247, 239, 0.85);
  gap: 0.75rem;
  flex-wrap: wrap;
}

.canvas-mode-tabs {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.mode-tab {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--content--border);
  background-color: var(--cl-bg);
  color: var(--content--secondary);
  transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease, opacity 0.25s ease;
}

.mode-tab:hover {
  border-color: var(--content--primary);
  color: var(--content--primary);
}

.mode-tab.active {
  background-color: var(--content--primary);
  color: var(--content--white);
  border-color: var(--content--primary);
}

.canvas-stage {
  position: relative;
  z-index: 5;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  min-height: 440px;
}

.blueprint-svg-wrap {
  position: relative;
  width: 100%;
  max-width: 640px;
  aspect-ratio: 4 / 3;
}

.blueprint-svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.blueprint-svg .layer-group {
  transition: opacity 0.45s ease, transform 0.55s var(--ease-out-expo);
}

.blueprint-svg.xray-active .layer-surface {
  opacity: 0.25;
}

.blueprint-svg.xray-active .layer-studs {
  opacity: 1;
  stroke: var(--content--brand);
}

/* Interactive CAD Inspection Pins (Like Heron AI's IBC 1015.3 / IBC 1011.11 Popovers) */
.cad-pin {
  position: absolute;
  z-index: 10;
  transform: translate(-50%, -50%);
}

.cad-pin.active,
.cad-pin:hover {
  z-index: 100;
}

.cad-pin-btn {
  width: 28px;
  height: 28px;
  background-color: var(--content--brand);
  color: var(--content--white);
  border: 1.5px solid var(--content--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  box-shadow: 0 4px 14px rgba(95, 112, 38, 0.35);
  transition: transform 0.3s var(--ease-out-expo), background-color 0.3s ease;
}

.cad-pin-btn::before {
  content: '';
  position: absolute;
  inset: -5px;
  border: 1px solid var(--content--brand);
  animation: pingRing 2.2s infinite ease-out;
}

@keyframes pingRing {
  0% { transform: scale(0.9); opacity: 0.9; }
  100% { transform: scale(1.45); opacity: 0; }
}

.cad-pin.active .cad-pin-btn,
.cad-pin:hover .cad-pin-btn {
  background-color: var(--content--primary);
  transform: scale(1.12);
}

.cad-pin-card {
  position: absolute;
  left: 36px;
  top: -12px;
  width: 250px;
  background-color: var(--cl-bg-elevated);
  border: 1px solid var(--content--primary);
  padding: 0.85rem;
  box-shadow: 0 12px 28px rgba(51, 53, 54, 0.14);
  opacity: 0;
  pointer-events: none;
  transform: translateY(6px);
  transition: opacity 0.3s ease, transform 0.3s var(--ease-out-expo);
  z-index: 110;
}

.cad-pin.pin-top .cad-pin-card {
  top: -75px;
}

.cad-pin.pin-left .cad-pin-card {
  left: auto;
  right: 36px;
}

.cad-pin.active .cad-pin-card,
.cad-pin:hover .cad-pin-card {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.cad-pin-code {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--content--white);
  background-color: var(--content--brand);
  padding: 0.15rem 0.45rem;
  display: inline-block;
  margin-bottom: 0.45rem;
}

.cad-pin-title {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--content--primary);
  margin-bottom: 0.25rem;
}

.cad-pin-desc {
  font-size: 0.76rem;
  line-height: 1.45;
  color: var(--content--secondary);
}

.canvas-footer-bar {
  position: relative;
  z-index: 6;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.5rem;
  border-top: 1px solid var(--content--border);
  background-color: rgba(246, 247, 239, 0.9);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--content--secondary);
}

/* ==========================================================================
   EDITORIAL MANIFESTO & MARQUEE SECTION (.home-intro)
   ========================================================================== */

.intro-section {
  display: grid;
  grid-template-columns: 280px 1fr;
}

.intro-sidebar {
  padding: 3.5rem 2.5rem;
  border-right: var(--size--border) solid var(--content--border);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.intro-body {
  padding: 4.5rem 3.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 3rem;
}

.intro-statement {
  font-family: var(--font-sans);
  font-size: clamp(1.5rem, 2.6vw, 2.55rem);
  font-weight: 600;
  line-height: 1.18;
  letter-spacing: -0.025em;
  text-transform: uppercase;
  color: var(--content--primary);
}

.intro-statement .muted {
  color: var(--content--surface);
}

.intro-statement .highlight {
  color: var(--content--brand);
}

.intro-metrics-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px dashed var(--content--border);
  padding-top: 2rem;
  gap: 1.5rem;
}

.metric-box {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.metric-value {
  font-family: var(--font-sans);
  font-size: clamp(1.8rem, 2.8vw, 2.75rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--content--primary);
}

.metric-value span {
  color: var(--content--brand);
}

.metric-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  color: var(--content--surface);
  letter-spacing: 0.04em;
}

/* Technical Marquee Strip */
.marquee-strip {
  border-top: var(--size--border) solid var(--content--border);
  background-color: var(--cl-bg-panel);
  padding: 0.9rem 0;
  overflow: hidden;
  display: flex;
  position: relative;
}

.marquee-track {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  white-space: nowrap;
  animation: marqueeScroll 32s linear infinite;
  will-change: transform;
  padding-right: 2.5rem;
}

.marquee-item {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--content--secondary);
}

.marquee-item .sep {
  color: var(--content--brand);
  font-weight: 700;
}

@keyframes marqueeScroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* ==========================================================================
   PROBLEMS / COMPARISON SECTION (.home-problem)
   Heron AI's 4-Column Numbered Technical Grid [01] - [04]
   ========================================================================== */

.section-header-grid {
  display: grid;
  grid-template-columns: 280px 1fr 380px;
  border-bottom: var(--size--border) solid var(--content--border);
  background-color: var(--cl-bg-panel);
  position: relative;
}

.section-header-grid::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 72px;
  height: 3px;
  background-color: var(--content--brand);
  z-index: 2;
}

.section-header-tag {
  padding: 2.75rem 2.25rem;
  border-right: var(--size--border) solid var(--content--border);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background-color: rgba(239, 239, 234, 0.7);
}

.section-header-title-wrap {
  padding: 3.5rem 3rem;
  border-right: var(--size--border) solid var(--content--border);
  display: flex;
  align-items: center;
}

.section-title {
  font-family: var(--font-sans);
  font-size: clamp(1.85rem, 3.1vw, 3rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  color: var(--content--primary);
}

.section-header-desc {
  padding: 3.5rem 2.5rem;
  display: flex;
  align-items: center;
  font-size: 0.98rem;
  line-height: 1.68;
  color: var(--content--secondary);
}

.problem-cards-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.problem-card {
  position: relative;
  padding: 2.75rem 2.25rem;
  border-right: var(--size--border) solid var(--content--border);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 410px;
  transition: background-color 0.35s ease;
  overflow: hidden;
}

.problem-card:last-child {
  border-right: none;
}

.problem-card:hover {
  background-color: var(--cl-bg-elevated);
}

.problem-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1rem;
  border-bottom: 1px dashed var(--content--border);
}

.problem-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.2rem 0.55rem;
  border: 1px solid var(--content--border);
  color: var(--content--secondary);
}

.problem-num {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--content--surface);
  transition: color 0.3s ease;
}

.problem-card:hover .problem-num {
  color: var(--content--brand);
}

.problem-diagram {
  height: 130px;
  margin: 1.5rem 0;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.problem-diagram svg {
  width: 100%;
  max-width: 180px;
  height: 110px;
  transition: transform 0.5s var(--ease-out-expo);
}

.problem-card:hover .problem-diagram svg {
  transform: scale(1.06);
}

.problem-card-title {
  font-family: var(--font-sans);
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
  color: var(--content--primary);
}

.problem-card-title span {
  color: var(--content--brand);
}

.problem-card-desc {
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--content--secondary);
  margin-bottom: 1.25rem;
}

.problem-solution-pill {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--content--primary);
  background-color: var(--cl-bg-panel);
  border-left: 2px solid var(--content--brand);
  padding: 0.55rem 0.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ==========================================================================
   EXPLODED ISOMETRIC DRYWALL ARCHITECTURE (.home-map adaptation)
   Interactive 5-Layer Engineering Inspector
   ========================================================================== */

.exploded-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
}

.exploded-stage-col {
  padding: 4.25rem 3rem;
  border-right: var(--size--border) solid var(--content--border);
  background-color: #eceee4;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
}

.exploded-svg-container {
  width: 100%;
  max-width: 560px;
  margin: 1.5rem auto;
}

.exploded-svg {
  width: 100%;
  height: auto;
  overflow: visible;
}

.exploded-layer {
  cursor: pointer;
  transition: transform 0.5s var(--ease-out-expo), opacity 0.4s ease;
}

.exploded-layer:hover {
  opacity: 0.9;
}

.exploded-layer.dimmed {
  opacity: 0.32;
}

.exploded-layer.highlighted {
  opacity: 1;
}

.exploded-controls-col {
  display: flex;
  flex-direction: column;
}

.layer-selector-item {
  padding: 1.85rem 2.25rem;
  border-bottom: var(--size--border) solid var(--content--border);
  cursor: pointer;
  transition: background-color 0.3s ease;
  position: relative;
}

.layer-selector-item:last-child {
  border-bottom: none;
}

.layer-selector-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background-color: var(--content--brand);
  transform: scaleY(0);
  transition: transform 0.35s var(--ease-out-expo);
}

.layer-selector-item:hover,
.layer-selector-item.active {
  background-color: var(--cl-bg-elevated);
}

.layer-selector-item.active::before {
  transform: scaleY(1);
}

.layer-item-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.45rem;
}

.layer-item-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--content--brand);
  font-weight: 600;
}

.layer-item-spec {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--content--surface);
  padding: 0.15rem 0.5rem;
  border: 1px solid var(--content--border);
}

.layer-item-title {
  font-family: var(--font-sans);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--content--primary);
  margin-bottom: 0.35rem;
}

.layer-item-desc {
  font-size: 0.86rem;
  line-height: 1.55;
  color: var(--content--secondary);
}

/* ==========================================================================
   CORE SOLUTIONS / FLAGSHIP SERVICES (.home-platform)
   ========================================================================== */

.services-bento-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
}

.service-module {
  border-right: var(--size--border) solid var(--content--border);
  border-bottom: var(--size--border) solid var(--content--border);
  padding: 3.25rem 2.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: background-color 0.35s ease;
}

.service-module:nth-child(2n) {
  border-right: none;
}

.service-module:nth-last-child(-n+2) {
  border-bottom: none;
}

.service-module:hover {
  background-color: var(--cl-bg-elevated);
}

.service-module-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.75rem;
}

.service-index {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--content--brand);
}

.service-norm-tags {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.norm-chip {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 0.2rem 0.55rem;
  border: 1px solid var(--content--border);
  background-color: var(--cl-bg);
  color: var(--content--secondary);
}

.service-visual-box {
  height: 200px;
  border: 1px solid var(--content--border);
  background-color: #eceee4;
  margin-bottom: 1.75rem;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.service-visual-box::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(51, 53, 54, 0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(51, 53, 54, 0.05) 1px, transparent 1px);
  background-size: 20px 20px;
}

.service-visual-box svg {
  position: relative;
  z-index: 2;
  width: 88%;
  height: 84%;
  transition: transform 0.5s var(--ease-out-expo);
}

.service-visual-box picture {
  display: block;
  width: 100%;
  height: 100%;
}

.service-visual-box img {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.service-module:hover .service-visual-box svg {
  transform: scale(1.04);
}

.service-title {
  font-family: var(--font-sans);
  font-size: 1.65rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
  color: var(--content--primary);
}

.service-desc {
  font-size: 0.94rem;
  line-height: 1.6;
  color: var(--content--secondary);
  margin-bottom: 1.5rem;
}

.service-specs-list {
  list-style: none;
  border-top: 1px dashed var(--content--border);
  padding-top: 1rem;
  margin-bottom: 1.75rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
}

.service-specs-list li {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--content--secondary);
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.service-specs-list li::before {
  content: '+';
  color: var(--content--brand);
  font-weight: 700;
}

/* ==========================================================================
   INTERACTIVE DRYWALL & CEILING CALCULATOR (High-Conversion CAD Tool)
   ========================================================================== */

.calc-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
}

.calc-form-col {
  padding: 3.5rem 3rem;
  border-right: var(--size--border) solid var(--content--border);
}

.calc-step-group {
  margin-bottom: 1.75rem;
}

.calc-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--content--primary);
  margin-bottom: 0.75rem;
}

.calc-options-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.65rem;
}

.calc-option-btn {
  padding: 0.9rem 1rem;
  border: 1px solid var(--content--border);
  background-color: var(--cl-bg-elevated);
  text-align: left;
  transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease, opacity 0.25s ease;
  position: relative;
}

.calc-option-btn:hover {
  border-color: var(--content--primary);
}

.calc-option-btn.active {
  border-color: var(--content--brand);
  background-color: var(--content--brand-soft);
}

.calc-option-title {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--content--primary);
  display: block;
}

.calc-option-sub {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--content--surface);
  margin-top: 2px;
  display: block;
}

.calc-inputs-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.85rem;
}

.calc-input-box {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.calc-input-box label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--content--secondary);
  text-transform: uppercase;
}

.calc-input {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--content--border);
  background-color: var(--cl-bg-elevated);
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--content--primary);
  transition: border-color 0.25s ease;
}

.calc-input:focus {
  border-color: var(--content--brand);
}

.calc-board-pills {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.65rem;
}

.board-pill {
  padding: 0.75rem;
  border: 1px solid var(--content--border);
  background-color: var(--cl-bg-elevated);
  text-align: left;
  transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease, opacity 0.25s ease;
}

.board-pill.active {
  border-color: var(--content--primary);
  background-color: var(--content--primary);
  color: var(--content--white);
}

.board-pill-code {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.board-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.board-dot.st { background-color: #d8d5c8; border: 1px solid #888; }
.board-dot.ru { background-color: #2e8b57; }
.board-dot.rf { background-color: #d94662; }

.board-pill-name {
  font-size: 0.75rem;
  margin-top: 3px;
  opacity: 0.85;
}

/* Right Column: Live Technical Output Blueprint Sheet */
.calc-output-col {
  padding: 3.5rem 3rem;
  background-color: var(--cl-bg-dark);
  color: var(--content--white);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
}

.calc-output-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1.25rem;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.2);
}

.calc-area-display {
  margin: 1.75rem 0;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.calc-area-num {
  font-family: var(--font-sans);
  font-size: 3.2rem;
  font-weight: 700;
  line-height: 1;
  color: var(--content--brand-light);
}

.calc-area-unit {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.7);
}

.calc-bom-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 1.75rem;
}

.bom-item {
  padding: 0.85rem;
  border: 1px solid rgba(255, 255, 255, 0.15);
  background-color: rgba(255, 255, 255, 0.03);
}

.bom-val {
  overflow-wrap: anywhere;
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--content--white);
}

.bom-lbl {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: rgba(255, 255, 255, 0.6);
  text-transform: uppercase;
  margin-top: 2px;
}

.calc-time-comparison {
  padding: 1rem;
  border: 1px dashed var(--content--brand-light);
  background-color: rgba(155, 176, 74, 0.12);
  margin-bottom: 1.75rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  line-height: 1.5;
}

/* ==========================================================================
   PROCESS / WORKFLOW (.home-why) & USE CASES MATRIX (.home-usecase)
   ========================================================================== */

.process-steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.process-step-card {
  padding: 2rem 2.25rem;
  border-right: var(--size--border) solid var(--content--border);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  position: relative;
  transition: background-color 0.3s ease;
}

.process-step-card:last-child {
  border-right: none;
}

.process-step-card:hover {
  background-color: var(--cl-bg-elevated);
}

.process-verb {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--content--brand);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.process-title {
  font-family: var(--font-sans);
  font-size: 1.3rem;
  font-weight: 700;
  margin: 0 0 0.4rem;
}

.process-desc {
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--content--secondary);
}

/* 8-Card Use Case Matrix (Heron AI's "MADE FOR THE PEOPLE IN THE MODEL") */
.usecase-matrix {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.usecase-cell {
  padding: 2rem;
  border-right: var(--size--border) solid var(--content--border);
  border-bottom: var(--size--border) solid var(--content--border);
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  position: relative;
  transition: background-color 0.3s ease;
}

.usecase-cell:nth-child(4n) {
  border-right: none;
}

.usecase-cell:nth-last-child(-n+4) {
  border-bottom: none;
}

.usecase-cell:hover {
  background-color: var(--cl-bg-elevated);
}

.usecase-cell:hover .corner-tick {
  color: var(--content--brand);
}

.usecase-role {
  font-family: var(--font-sans);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--content--primary);
}

.usecase-text {
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--content--secondary);
}

/* ==========================================================================
   PROJECTS IN ARACAJU SHOWCASE (Filterable Technical Cards)
   ========================================================================== */

.portfolio-filter-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 2rem;
  border-bottom: var(--size--border) solid var(--content--border);
  background-color: var(--cl-bg-panel);
  flex-wrap: wrap;
  gap: 1rem;
}

.filter-btns {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.filter-btn {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--content--border);
  background-color: var(--cl-bg);
  color: var(--content--secondary);
  transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease, opacity 0.25s ease;
}

.filter-btn.active,
.filter-btn:hover {
  background-color: var(--content--primary);
  color: var(--content--white);
  border-color: var(--content--primary);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.project-card {
  border-right: var(--size--border) solid var(--content--border);
  padding: 2.75rem 2.25rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: background-color 0.3s ease;
}

.project-card:nth-child(3n) {
  border-right: none;
}

.project-card:hover {
  background-color: var(--cl-bg-elevated);
}

.project-meta-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--content--surface);
  margin-bottom: 1rem;
}

.project-Loc {
  color: var(--content--brand);
  font-weight: 600;
}

.project-visual {
  height: 190px;
  border: 1px solid var(--content--border);
  background-color: #eceee4;
  margin-bottom: 1.25rem;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.project-title {
  font-family: var(--font-sans);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.45rem;
}

.project-desc {
  font-size: 0.86rem;
  line-height: 1.55;
  color: var(--content--secondary);
  margin-bottom: 1.25rem;
}

.project-stats {
  display: flex;
  justify-content: space-between;
  border-top: 1px dashed var(--content--border);
  padding-top: 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--content--primary);
}

/* ==========================================================================
   FAQ ACCORDION (Heron AI's .product-faq style)
   ========================================================================== */

.faq-layout {
  display: grid;
  grid-template-columns: 420px 1fr;
}

.faq-title-col {
  padding: 4rem 3rem;
  border-right: var(--size--border) solid var(--content--border);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background-color: var(--cl-bg-panel);
}

.faq-list-col {
  display: flex;
  flex-direction: column;
}

.faq-item {
  border-bottom: var(--size--border) solid var(--content--border);
  transition: background-color 0.3s ease;
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-trigger {
  width: 100%;
  padding: 2.15rem 2.5rem;
  display: grid;
  grid-template-columns: 60px 1fr 32px;
  align-items: center;
  text-align: left;
}

.faq-num {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--content--surface);
  transition: color 0.3s ease;
}

.faq-question {
  font-family: var(--font-sans);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--content--primary);
}

.faq-icon {
  width: 24px;
  height: 24px;
  border: 1px solid var(--content--border);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: border-color 0.3s ease, background-color 0.3s ease;
}

.faq-icon-h,
.faq-icon-v {
  position: absolute;
  background-color: var(--content--primary);
  transition: transform 0.35s var(--ease-out-expo);
}
.faq-icon-h { width: 10px; height: 1.5px; }
.faq-icon-v { width: 1.5px; height: 10px; }

.faq-item:hover .faq-num,
.faq-item.active .faq-num {
  color: var(--content--brand);
}

.faq-item.active .faq-icon-v {
  transform: scaleY(0);
}

.faq-item.active {
  background-color: var(--cl-bg-elevated);
}

.faq-answer-wrap {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.4s var(--ease-out-expo);
}

.faq-item.active .faq-answer-wrap {
  grid-template-rows: 1fr;
}

.faq-answer-inner {
  overflow: hidden;
}

.faq-answer {
  padding: 0 2.25rem 1.75rem calc(2.25rem + 60px);
  font-size: 0.94rem;
  line-height: 1.65;
  color: var(--content--secondary);
  max-width: 68ch;
}

/* ==========================================================================
   ARCHITECTURAL COORDINATE CTA SECTION (Heron AI's [0,246] [831,0] CTA)
   ========================================================================== */

.cta-coordinate-section {
  position: relative;
  padding: 6.5rem 2.5rem;
  background-color: #eceee4;
  overflow: hidden;
}

.cta-coord-frame {
  max-width: 1040px;
  margin: 0 auto;
  border: 1px dashed var(--content--primary);
  background-color: var(--cl-bg);
  padding: 3.5rem;
  position: relative;
}

.coord-corner-label {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  background-color: var(--cl-bg);
  padding: 0.15rem 0.4rem;
  border: 1px solid var(--content--border);
  color: var(--content--secondary);
}
.coord-corner-label.tl { top: -12px; left: -12px; }
.coord-corner-label.tr { top: -12px; right: -12px; }
.coord-corner-label.bl { bottom: -12px; left: -12px; }
.coord-corner-label.br { bottom: -12px; right: -12px; }

.cta-inner-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3rem;
  align-items: center;
}

.cta-lead-form {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  padding: 1.75rem;
  border: 1px solid var(--content--border);
  background-color: var(--cl-bg-elevated);
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-field label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  color: var(--content--secondary);
}

.form-input {
  width: 100%;
  min-width: 0;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--content--border);
  background-color: var(--cl-bg);
  font-size: 0.9rem;
  transition: border-color 0.25s ease;
}

.form-input:focus {
  border-color: var(--content--brand);
}

/* ==========================================================================
   ARCHITECTURAL FOOTER
   ========================================================================== */

.site-footer {
  background-color: var(--cl-bg);
  border-top: var(--size--border) solid var(--content--border);
  margin-top: clamp(3rem, 5vw, 5.25rem);
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1.2fr;
  border-bottom: var(--size--border) solid var(--content--border);
}

.footer-col {
  padding: 2.5rem 2rem;
  border-right: var(--size--border) solid var(--content--border);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.25rem;
}

.footer-col:last-child {
  border-right: none;
}

.footer-col-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--content--brand);
  margin-bottom: 0.5rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.footer-links a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--content--secondary);
  transition: color 0.25s ease, transform 0.25s ease;
  display: inline-block;
}

.footer-links a:hover {
  color: var(--content--brand);
  transform: translateX(4px);
}

.footer-giant-brand {
  padding: 2rem 2rem 1rem;
  border-bottom: var(--size--border) solid var(--content--border);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(1rem, 3vw, 2.5rem);
}

.footer-giant-mark {
  height: clamp(64px, 11vw, 150px);
  width: auto;
  flex-shrink: 0;
}

.footer-giant-svg {
  flex: 1 1 auto;
  min-width: 0;
  max-width: 1100px;
  height: auto;
  display: block;
}

.footer-bottom-bar {
  padding: 1.25rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--content--surface);
  flex-wrap: wrap;
  gap: 1rem;
}

/* ==========================================================================
   FLOATING WHATSAPP TECHNICAL WIDGET
   ========================================================================== */

.floating-wa {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 90;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background-color: var(--content--primary);
  color: var(--content--white);
  border: 1px solid var(--content--brand);
  padding: 0.75rem 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  box-shadow: 0 12px 28px rgba(51, 53, 54, 0.24);
  transition: transform 0.3s var(--ease-out-expo), background-color 0.3s ease;
}

.floating-wa:hover {
  background-color: var(--content--brand);
  transform: translateY(-3px);
}

/* ==========================================================================
   RESPONSIVE BREAKPOINTS
   ========================================================================== */

.hero-grid > *,
.section-header-grid > *,
.intro-section > *,
.intro-metrics-row > *,
.exploded-layout > *,
.services-bento-grid > *,
.calc-grid > *,
.calc-options-grid > *,
.calc-inputs-row > *,
.calc-board-pills > *,
.calc-bom-grid > *,
.faq-layout > *,
.cta-inner-grid > *,
.footer-top-grid > * {
  min-width: 0;
}

@media (max-width: 1120px) {
  .header-nav {
    display: none;
  }

  .header-container {
    grid-template-columns: minmax(0, 1fr) auto auto;
  }

  .mobile-menu-toggle {
    display: flex;
    min-height: 44px;
  }

  .header-nav.mobile-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    max-height: calc(100vh - var(--header-height));
    max-height: calc(100dvh - var(--header-height));
    overflow-y: auto;
    overscroll-behavior: contain;
    background-color: var(--cl-bg);
    border-bottom: 1px solid var(--content--border);
  }

  .header-nav.mobile-open .nav-item {
    flex-shrink: 0;
    min-height: 48px;
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--content--border);
  }

  .hero-grid,
  .exploded-layout,
  .calc-grid,
  .faq-layout,
  .cta-inner-grid {
    grid-template-columns: 1fr;
  }

  .hero-content-col,
  .exploded-stage-col,
  .calc-form-col,
  .faq-title-col {
    border-right: none;
    border-bottom: var(--size--border) solid var(--content--border);
  }

  .section-header-grid {
    grid-template-columns: 1fr;
  }

  .section-header-tag,
  .section-header-title-wrap {
    border-right: none;
    border-bottom: var(--size--border) solid var(--content--border);
  }

  .problem-cards-grid,
  .process-steps-grid,
  .usecase-matrix {
    grid-template-columns: repeat(2, 1fr);
  }

  .problem-card:nth-child(2n),
  .process-step-card:nth-child(2n),
  .usecase-cell:nth-child(2n) {
    border-right: none;
  }

  .problem-card:nth-child(-n+2),
  .process-step-card:nth-child(-n+2),
  .usecase-cell:nth-child(-n+2) {
    border-bottom: var(--size--border) solid var(--content--border);
  }

  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-top-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 820px) {
  .header-status,
  .header-cta-wrap {
    display: none;
  }

  .header-container {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .brand-logo {
    min-width: 0;
    padding: 0 1rem;
  }

  .brand-logo-img {
    max-width: 100%;
    height: auto;
    max-height: 46px;
  }

  .hero-main-copy {
    padding: 2.25rem 1.5rem;
  }

  .hero-top-meta,
  .canvas-toolbar {
    padding: 1rem 1.5rem;
  }

  .hero-title {
    font-size: clamp(1.85rem, 6.5vw, 3rem);
    overflow-wrap: anywhere;
  }

  .hero-eyebrow {
    display: none;
    max-width: 100%;
    line-height: 1.5;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .canvas-mode-tabs {
    display: grid;
    width: 100%;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .mode-tab,
  .form-input,
  .calc-input,
  #resetLayersBtn {
    min-height: 44px;
  }

  .form-input,
  .calc-input {
    width: 100%;
    min-width: 0;
    font-size: 1rem;
  }

  .canvas-stage {
    min-height: 0;
    padding: 1.5rem;
  }

  .blueprint-svg-wrap {
    aspect-ratio: auto;
  }

  .blueprint-svg {
    display: block;
    height: auto;
  }

  /* Mobile keeps the model and layer tabs without inspection controls. */
  .cad-pin {
    display: none;
  }

  .exploded-stage-col {
    padding: 2rem 1.5rem;
  }

  .calc-label,
  .calc-output-header,
  .calc-area-display,
  .exploded-stage-col > .mono-tag,
  .exploded-stage-col > .coord-badge,
  .lead-form-header {
    flex-wrap: wrap;
    gap: 0.75rem;
  }

  .calc-area-num {
    font-size: clamp(2rem, 8vw, 3.2rem);
  }

  .section-title {
    overflow-wrap: anywhere;
  }

  .cta-coordinate-section {
    padding: 3rem 1rem;
  }

  .cta-inner-grid {
    gap: 2rem;
  }

  .cta-lead-form {
    padding: 1rem;
  }

  .lead-form-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.25rem;
  }

  .faq-trigger {
    padding: 1.5rem;
    grid-template-columns: 24px minmax(0, 1fr) 24px;
    gap: 0.75rem;
  }

  .faq-question {
    font-size: 1rem;
  }

  .floating-wa {
    min-height: 44px;
    bottom: calc(12px + env(safe-area-inset-bottom, 0px));
    right: calc(12px + env(safe-area-inset-right, 0px));
    padding: 0.75rem;
    font-size: 0.65rem;
  }

  .footer-bottom-bar {
    padding-bottom: 5rem;
  }

  .intro-section,
  .services-bento-grid,
  .problem-cards-grid,
  .process-steps-grid,
  .usecase-matrix,
  .projects-grid,
  .footer-top-grid {
    grid-template-columns: 1fr;
  }

  .intro-sidebar,
  .service-module,
  .problem-card,
  .process-step-card,
  .usecase-cell,
  .project-card,
  .footer-col {
    border-right: none !important;
    border-bottom: var(--size--border) solid var(--content--border) !important;
  }

  .intro-metrics-row,
  .calc-inputs-row,
  .calc-board-pills,
  .hero-pillars {
    grid-template-columns: 1fr;
  }

  .hero-pillar-item {
    border-right: none;
    border-bottom: var(--size--border) solid var(--content--border);
  }

  .cta-coord-frame {
    padding: 1.5rem 1rem;
  }

  .faq-answer {
    padding: 0 1.5rem 1.5rem;
  }

  .section-block {
    margin-top: 2.5rem;
  }

  .site-footer {
    margin-top: 2.5rem;
  }

  .section-header-tag {
    padding: 1.75rem 1.5rem;
  }

  .section-header-title-wrap {
    padding: 2rem 1.5rem;
  }

  .section-header-desc {
    padding: 1.75rem 1.5rem;
  }

  .intro-sidebar {
    padding: 2.25rem 1.5rem;
  }

  .intro-body {
    padding: 2.5rem 1.5rem;
  }

  .problem-card,
  .service-module,
  .calc-form-col,
  .calc-output-col,
  .process-step-card,
  .project-card,
  .faq-title-col {
    padding: 2rem 1.5rem;
  }
}

@media (max-width: 480px) {
  .calc-options-grid,
  .service-specs-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-top-meta,
  .hero-main-copy,
  .canvas-toolbar,
  .canvas-stage {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .btn-heron-label {
    padding: 0.85rem 0.75rem;
  }

  .layer-selector-item {
    padding: 1.5rem;
  }

  .layer-item-head,
  .service-module-top {
    flex-wrap: wrap;
    gap: 0.75rem;
  }

  .footer-col {
    padding: 2rem 1.5rem;
    overflow-wrap: anywhere;
  }
}

/* Performance: animações só rodam quando visíveis; seções fora da tela não renderizam */
.is-offscreen .marquee-track,
.is-offscreen .cad-pin-btn::before,
.mono-tag.is-offscreen .dot.pulse {
  animation-play-state: paused;
}

.section-block:not(.hero-section) {
  content-visibility: auto;
  contain-intrinsic-size: auto 900px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

.calc-output-col .mono-tag .dot,
.calc-output-col strong {
  color: var(--content--brand-light);
}

.calc-output-col .mono-tag .dot {
  background-color: var(--content--brand-light);
}

/* MOBILE PRESENTATION: desktop content and existing styles remain unchanged. */
.mobile-only {
  display: none;
}

@media (max-width: 820px) {
  .mobile-only {
    display: block;
  }

  .desktop-only {
    display: none;
  }

  #anatomia .layer-selector-item,
  #anatomia .layer-selection-hint {
    display: none;
  }

  #anatomia .layer-selector-item.active {
    display: block;
  }

  #anatomia .exploded-controls-col:not(:has(.layer-selector-item.active)) .layer-selection-hint {
    display: block;
    padding: 1.5rem;
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--content--secondary);
  }

  html {
    scroll-padding-bottom: calc(100px + env(safe-area-inset-bottom, 0px));
  }

  body {
    padding-bottom: calc(88px + env(safe-area-inset-bottom, 0px));
  }

  #problemas .problem-scroll-hint,
  #servicos .service-scroll-hint {
    padding: 1rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    line-height: 1.5;
    color: var(--content--brand);
  }

  #problemas .section-header-desc,
  #anatomia .section-header-desc,
  #simulador .section-header-desc,
  #servicos .section-header-desc {
    display: none;
  }

  #problemas .problem-cards-grid,
  #servicos .services-bento-grid {
    display: flex;
    flex-wrap: nowrap;
    width: 100%;
    gap: 1rem;
    min-width: 0;
    max-width: 100%;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scroll-padding-inline: 0;
    overscroll-behavior-x: contain;
    padding: 0 0 1rem;
    scrollbar-width: thin;
    scrollbar-color: var(--content--brand) var(--cl-bg-panel);
  }

  #problemas .problem-cards-grid:focus-visible,
  #servicos .services-bento-grid:focus-visible {
    outline: 2px solid var(--content--brand);
    outline-offset: -2px;
  }

  #problemas .problem-card,
  #servicos .service-module {
    flex: 0 0 100%;
    min-width: 100%;
    max-width: 100%;
    padding: 1.5rem;
    scroll-snap-align: start;
    scroll-snap-stop: always;
    border: 1px solid var(--content--border) !important;
  }

  #problemas .problem-solution-pill {
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .mobile-technical-details summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    min-height: 44px;
    color: var(--content--brand);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    cursor: pointer;
    list-style: none;
  }

  .mobile-technical-details summary::-webkit-details-marker {
    display: none;
  }

  .mobile-technical-details summary::after {
    content: '+';
    font-size: 1.25rem;
  }

  .mobile-technical-details[open] summary::after {
    content: '−';
  }

  .mobile-technical-details .layer-item-desc {
    margin-top: 0.35rem;
  }

  .marquee-strip {
    display: none;
  }

  .marquee-track,
  .cad-pin-btn::before,
  .mono-tag .dot.pulse,
  .dot.pulse {
    animation: none;
  }

  .btn-heron-label-stack,
  .btn-heron-icon-track,
  .btn-heron-label-top,
  .btn-heron-icon-top,
  .btn-heron::after,
  .blueprint-svg,
  .exploded-layer {
    transition: none;
  }

  .btn-heron-label-bot,
  .btn-heron-icon-bot {
    display: none;
  }

  .btn-heron:hover .btn-heron-label-top,
  .btn-heron:hover .btn-heron-icon-top {
    transform: none;
  }

  .cta-lead-form .form-field {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
  }

  .cta-lead-form .form-input {
    scroll-margin-bottom: 100px;
  }

  .mobile-technical-details summary:focus-visible {
    outline: 2px solid var(--content--brand);
    outline-offset: 3px;
  }

  .floating-wa {
    left: calc(12px + env(safe-area-inset-left, 0px));
    right: calc(12px + env(safe-area-inset-right, 0px));
    bottom: calc(12px + env(safe-area-inset-bottom, 0px));
    min-height: 52px;
    justify-content: center;
    font-size: 0.75rem;
  }

  body:has(input:focus) .floating-wa,
  body:has(select:focus) .floating-wa,
  body:has(textarea:focus) .floating-wa {
    visibility: hidden;
    pointer-events: none;
  }
}

/* MOBILE SIMULATOR — original desktop controls remain unchanged. */
#simulador .mobile-only {
  display: none;
}

@media (max-width: 820px) {
  #simulador .calc-desktop-copy {
    display: none;
  }

  #simulador #calcSystemOptions {
    display: none;
  }

  #simulador #calcSystemSelect {
    min-height: 48px;
  }

  #simulador .mobile-only {
    display: block;
  }

  #simulador .calc-advanced-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    width: 100%;
    min-height: 48px;
    padding: 0.85rem;
    margin-bottom: 0.85rem;
    border: 1px solid var(--content--border);
    background: var(--cl-bg-elevated);
    color: var(--content--primary);
    font: inherit;
    font-size: 0.9rem;
    text-align: left;
  }

  #simulador .calc-advanced-toggle[hidden],
  #simulador #calcAdvancedPanel[hidden] {
    display: none;
  }

  #simulador .calc-measures-help {
    margin: -0.75rem 0 1.25rem;
    font-size: 0.85rem;
    color: var(--content--secondary);
  }

  #simulador .calc-option-btn,
  #simulador .board-pill {
    min-height: 48px;
  }
}

@media (max-width: 820px) {
  #simulador .calc-mobile-privacy {
    margin: 1rem 0;
    font-size: 0.85rem;
    line-height: 1.6;
    color: var(--content--white);
  }
}