/* ============================================================
   YZ TECH — HVAC Engineering & Smart Climate Architecture
   Design System: Warm Sand + Coral + White | Apple-Clean Minimal
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* ── CSS Custom Properties ───────────────────────────────── */
:root {
  /* Palette */
  --sand-50:  #FDFAF6;
  --sand-100: #F9F3EB;
  --sand-200: #F2E8D8;
  --sand-300: #E8D5BE;
  --sand-400: #D6BA9A;

  --coral-300: #F4A88A;
  --coral-400: #EF8A6B;
  --coral-500: #E8704E;
  --coral-600: #D95A38;

  --warm-white: #FEFCFA;
  --off-white:  #F7F2EC;

  --text-900: #1A1208;
  --text-700: #4A3728;
  --text-500: #7A6455;
  --text-300: #B09888;
  --text-200: #D4C4B8;

  --border-light: rgba(215, 195, 175, 0.45);
  --border-mid:   rgba(180, 155, 130, 0.35);

  /* Gradients */
  --gradient-hero: linear-gradient(135deg, #FDFAF6 0%, #F5ECE0 50%, #EFE0CE 100%);
  --gradient-coral: linear-gradient(135deg, #F4A88A 0%, #E8704E 60%, #D95A38 100%);
  --gradient-warm:  linear-gradient(135deg, #F9F3EB 0%, #F2E8D8 100%);
  --gradient-card:  linear-gradient(145deg, rgba(253,250,246,0.9) 0%, rgba(242,232,216,0.7) 100%);
  --gradient-mesh:  radial-gradient(ellipse at 20% 30%, rgba(244,168,138,0.18) 0%, transparent 60%),
                    radial-gradient(ellipse at 80% 70%, rgba(232,112,78,0.12) 0%, transparent 55%),
                    radial-gradient(ellipse at 50% 50%, rgba(249,243,235,1) 0%, rgba(242,232,216,1) 100%);

  /* Typography */
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Layout */
  --max-w: 1200px;
  --nav-h: 72px;
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 28px;
  --radius-xl: 36px;

  /* Shadows */
  --shadow-xs:  0 1px 3px rgba(100, 65, 40, 0.06);
  --shadow-sm:  0 4px 12px rgba(100, 65, 40, 0.08);
  --shadow-md:  0 8px 28px rgba(100, 65, 40, 0.10);
  --shadow-lg:  0 20px 50px rgba(100, 65, 40, 0.12);
  --shadow-coral: 0 12px 35px rgba(232, 112, 78, 0.28);

  /* Transitions */
  --ease-out:    cubic-bezier(0.22, 1, 0.36, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --t-fast: 0.18s;
  --t-mid:  0.35s;
  --t-slow: 0.6s;
}

/* ── Reset & Base ────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: var(--font);
  background: var(--sand-50);
  color: var(--text-900);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
img { display: block; max-width: 100%; }
button { font-family: var(--font); cursor: pointer; border: none; background: none; }

/* ── Utilities ───────────────────────────────────────────── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
}

.gradient-text {
  background: var(--gradient-coral);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-label {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--coral-500);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.section-label::before {
  content: '';
  display: block;
  width: 24px;
  height: 2px;
  background: var(--gradient-coral);
  border-radius: 2px;
}

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.75rem 1.625rem;
  border-radius: 100px;
  transition: transform var(--t-fast) var(--ease-spring),
              box-shadow var(--t-fast) var(--ease-out);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0);
  transition: background var(--t-fast);
}
.btn:hover::after { background: rgba(255,255,255,0.12); }
.btn:active { transform: scale(0.97) !important; }

.btn-primary {
  background: var(--gradient-coral);
  color: #fff;
  box-shadow: var(--shadow-coral);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 40px rgba(232, 112, 78, 0.38);
}

.btn-secondary {
  background: rgba(255,255,255,0.85);
  color: var(--text-700);
  border: 1.5px solid var(--border-light);
  backdrop-filter: blur(12px);
}
.btn-secondary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
  border-color: var(--coral-300);
}

.btn-ghost {
  color: var(--coral-500);
  font-weight: 600;
  padding: 0.5rem 0;
  border-radius: 0;
  gap: 0.35rem;
}
.btn-ghost:hover { gap: 0.7rem; color: var(--coral-600); }
.btn-ghost svg { transition: transform var(--t-fast) var(--ease-spring); }
.btn-ghost:hover svg { transform: translateX(4px); }

/* ── Navigation ──────────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  background: rgba(253, 250, 246, 0.82);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-light);
  z-index: 900;
  display: flex;
  align-items: center;
  transition: box-shadow var(--t-mid);
}
.navbar.scrolled { box-shadow: var(--shadow-sm); }

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  width: 100%;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: -0.025em;
  color: var(--text-900);
}
.nav-brand-icon {
  width: 34px; height: 34px;
  background: var(--gradient-coral);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-500);
  padding: 0.5rem 0.875rem;
  border-radius: 100px;
  transition: color var(--t-fast), background var(--t-fast);
}
.nav-links a:hover, .nav-links a.active {
  color: var(--text-900);
  background: var(--sand-200);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.btn-demo {
  background: var(--sand-200);
  color: var(--coral-600);
  border: 1.5px solid var(--coral-300);
  padding: 0.55rem 1.2rem;
  font-size: 0.875rem;
}
.btn-demo:hover {
  background: var(--coral-300);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

/* Mobile hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 22px; height: 2px;
  background: var(--text-700);
  border-radius: 2px;
  transition: var(--t-fast);
}

/* ── Main Offset ─────────────────────────────────────────── */
main { padding-top: var(--nav-h); }

/* ── Hero Section ────────────────────────────────────────── */
.hero {
  background: var(--gradient-mesh);
  padding: 6rem 0 5rem;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 1px 1px, rgba(180,140,110,0.15) 1px, transparent 0);
  background-size: 32px 32px;
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 1rem;
  background: rgba(244, 168, 138, 0.18);
  border: 1px solid rgba(244, 168, 138, 0.5);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--coral-600);
  margin-bottom: 1.75rem;
}
.hero-badge-dot {
  width: 7px; height: 7px;
  background: var(--coral-500);
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.8); }
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 3.85rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.035em;
  margin-bottom: 1.5rem;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--text-500);
  line-height: 1.7;
  margin-bottom: 2.5rem;
  max-width: 480px;
}

.hero-ctas {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ── 3D Airflow Proxy ────────────────────────────────────── */
.airflow-canvas-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  max-height: 480px;
  background: rgba(255,255,255,0.55);
  backdrop-filter: blur(24px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  user-select: none;
}

.airflow-canvas-wrap::before {
  content: '';
  position: absolute;
  inset: -50%;
  background: radial-gradient(ellipse, rgba(244,168,138,0.15) 0%, transparent 65%);
  pointer-events: none;
}

#airflow-proxy {
  width: 75%;
  height: 75%;
  transform-style: preserve-3d;
  perspective: 800px;
  cursor: grab;
  transition: transform 0.05s linear;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transform: rotateX(20deg) rotateY(-30deg);
}
#airflow-proxy.dragging { cursor: grabbing; transition: none; }

#airflow-proxy svg {
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
}

.proxy-hint {
  position: absolute;
  bottom: 1.25rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.75rem;
  color: var(--text-300);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  pointer-events: none;
  white-space: nowrap;
}

/* ── Metrics Ribbon ──────────────────────────────────────── */
.metrics-ribbon {
  background: var(--warm-white);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
  padding: 3.5rem 0;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}

.metric {
  text-align: center;
  padding: 1rem 2rem;
  border-right: 1px solid var(--border-light);
}
.metric:last-child { border-right: none; }

.metric-num {
  font-size: 2.75rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 0.5rem;
}

.metric-label {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-500);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ── Scope Widget ────────────────────────────────────────── */
.scope-section {
  padding: 6rem 0;
}

.scope-toggle-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: 3.5rem;
}

.scope-toggle {
  display: inline-flex;
  background: var(--sand-200);
  border: 1px solid var(--border-light);
  border-radius: 100px;
  padding: 5px;
  gap: 4px;
}

.scope-btn {
  padding: 0.65rem 1.5rem;
  border-radius: 100px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-500);
  transition: all var(--t-mid) var(--ease-out);
}
.scope-btn.active {
  background: #fff;
  color: var(--text-900);
  box-shadow: var(--shadow-sm);
}

.scope-panel {
  display: none;
  animation: fadeUp 0.4s var(--ease-out) forwards;
}
.scope-panel.active { display: block; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}

.scope-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  background: rgba(255,255,255,0.7);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: 3.5rem;
  box-shadow: var(--shadow-md);
}

.scope-meta h3 {
  font-size: 1.85rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}
.scope-meta p { color: var(--text-500); font-size: 1.05rem; margin-bottom: 1.75rem; }

.scope-bullets {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}
.scope-bullet {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-700);
}
.scope-bullet-icon {
  width: 22px; height: 22px;
  background: rgba(232,112,78,0.12);
  border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  color: var(--coral-500);
  font-size: 0.7rem;
}

.scope-chart {
  background: var(--sand-100);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 2rem;
  height: 240px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 0.6rem;
}
.scope-chart-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-300);
  margin-bottom: auto;
}

.chart-bar-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.78rem;
  color: var(--text-500);
}
.chart-bar-track {
  flex: 1;
  height: 8px;
  background: var(--sand-300);
  border-radius: 100px;
  overflow: hidden;
}
.chart-bar-fill {
  height: 100%;
  border-radius: 100px;
  background: var(--gradient-coral);
  width: 0;
  transition: width 1.2s var(--ease-out);
}
.chart-bar-fill.animated { width: var(--bar-w); }

/* ── Teasers ─────────────────────────────────────────────── */
.teasers-section {
  padding: 2rem 0 7rem;
}

.teasers-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.teaser-card {
  display: block;
  background: rgba(255,255,255,0.7);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: 2.75rem;
  transition: transform var(--t-mid) var(--ease-spring),
              box-shadow var(--t-mid) var(--ease-out),
              border-color var(--t-fast);
}
.teaser-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--coral-300);
}

.teaser-icon {
  width: 52px; height: 52px;
  background: var(--gradient-warm);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 1.5rem;
  color: var(--coral-500);
}

.teaser-card h3 {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}
.teaser-card p { font-size: 0.95rem; color: var(--text-500); }

/* ── Reveal Animations ───────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--t-slow) var(--ease-out),
              transform var(--t-slow) var(--ease-out);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ── Page Hero (Inner Pages) ─────────────────────────────── */
.page-hero {
  background: var(--gradient-mesh);
  padding: 5.5rem 0 4.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at 1px 1px, rgba(180,140,110,0.15) 1px, transparent 0);
  background-size: 32px 32px;
  pointer-events: none;
}

.page-hero h1 {
  font-size: clamp(2.25rem, 4vw, 3.25rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  max-width: 760px;
  margin: 0 auto 1.25rem;
}
.page-hero p {
  font-size: 1.15rem;
  color: var(--text-500);
  max-width: 600px;
  margin: 0 auto;
}

/* ── Capabilities Page ───────────────────────────────────── */
.cap-section { padding: 6rem 0; }

.cap-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 4rem;
}

.cap-card {
  background: rgba(255,255,255,0.75);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  transition: transform var(--t-mid) var(--ease-spring),
              box-shadow var(--t-mid),
              border-color var(--t-fast);
}
.cap-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--coral-300);
}

.cap-card-icon {
  width: 54px; height: 54px;
  background: var(--gradient-coral);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  margin-bottom: 1.5rem;
}

.cap-card h3 {
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.015em;
  margin-bottom: 0.75rem;
}
.cap-card p { font-size: 0.9rem; color: var(--text-500); line-height: 1.7; }

.cap-tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.25rem;
}
.cap-tag {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.3rem 0.75rem;
  background: rgba(232,112,78,0.1);
  color: var(--coral-600);
  border-radius: 100px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* Alternating service rows */
.service-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
  padding: 5rem 0;
  border-top: 1px solid var(--border-light);
}
.service-row:first-of-type { border-top: none; }

.service-row.reverse .service-visual { order: -1; }

.service-content h2 {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  margin-bottom: 1.25rem;
}
.service-content p {
  color: var(--text-500);
  font-size: 1.025rem;
  margin-bottom: 1.25rem;
}

.service-visual {
  background: var(--gradient-warm);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  height: 340px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.service-visual-inner {
  text-align: center;
  color: var(--text-300);
}
.service-visual-inner svg { margin: 0 auto 0.75rem; }

/* Diagnostic widget */
.diag-widget {
  background: var(--gradient-warm);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: 3.5rem;
  margin-top: 5rem;
}
.diag-widget h2 {
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}
.diag-widget > p { color: var(--text-500); margin-bottom: 3rem; }

.diag-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 3rem;
}

.diag-options { display: flex; flex-direction: column; gap: 0.75rem; }

.diag-option {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: #fff;
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
  font-weight: 500;
  font-size: 0.9rem;
}
.diag-option:hover { border-color: var(--coral-400); }
.diag-option input[type="checkbox"] {
  width: 18px; height: 18px;
  accent-color: var(--coral-500);
  cursor: pointer;
}

.diag-output {
  background: #fff;
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2rem;
  min-height: 200px;
}
.diag-output-title {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  font-weight: 700;
  color: var(--text-300);
  margin-bottom: 1.5rem;
}

.diag-reg {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.875rem 1rem;
  background: var(--sand-50);
  border-left: 3px solid var(--coral-400);
  border-radius: 0 8px 8px 0;
  margin-bottom: 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-700);
  animation: fadeUp 0.3s var(--ease-out) forwards;
}

/* ── Projects Page ───────────────────────────────────────── */
.projects-section { padding: 4rem 0 7rem; }

.filter-bar {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 3.5rem;
}

.filter-btn {
  padding: 0.5rem 1.25rem;
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-500);
  border: 1.5px solid var(--border-light);
  background: #fff;
  transition: all var(--t-fast);
}
.filter-btn:hover, .filter-btn.active {
  background: var(--text-900);
  color: var(--sand-50);
  border-color: var(--text-900);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
  transition: all var(--t-mid);
}

.project-card {
  background: rgba(255,255,255,0.8);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: transform var(--t-mid) var(--ease-spring),
              box-shadow var(--t-mid),
              opacity var(--t-mid);
}
.project-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}
.project-card.hidden {
  opacity: 0;
  pointer-events: none;
  transform: scale(0.96);
}

.project-visual {
  height: 210px;
  background: var(--gradient-warm);
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.project-visual-label {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 0.75rem 1rem;
  background: linear-gradient(transparent, rgba(253,250,246,0.9));
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-500);
  text-align: center;
}

.project-body { padding: 1.75rem; }
.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.875rem;
}
.project-tag {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.75rem;
  background: rgba(232,112,78,0.1);
  color: var(--coral-600);
  border-radius: 100px;
}

.project-title {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  margin-bottom: 0.5rem;
}
.project-desc {
  font-size: 0.875rem;
  color: var(--text-500);
  line-height: 1.65;
}

/* ── Contact Page ────────────────────────────────────────── */
.contact-section { padding: 4rem 0 7rem; }

.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3.5rem;
}

/* Multi-step form */
.intake-engine {
  background: rgba(255,255,255,0.85);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: 3rem;
  box-shadow: var(--shadow-md);
}

.form-step { display: none; }
.form-step.active { display: block; animation: fadeUp 0.35s var(--ease-out) forwards; }

.step-progress {
  display: flex;
  align-items: center;
  gap: 0;
  margin-bottom: 2.5rem;
}
.step-dot {
  width: 30px; height: 30px;
  border-radius: 50%;
  background: var(--sand-200);
  border: 2px solid var(--border-light);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-300);
  transition: all var(--t-mid);
  flex-shrink: 0;
}
.step-dot.active {
  background: var(--gradient-coral);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 4px 12px rgba(232,112,78,0.35);
}
.step-dot.done {
  background: rgba(232,112,78,0.15);
  border-color: var(--coral-400);
  color: var(--coral-500);
}
.step-line {
  flex: 1;
  height: 2px;
  background: var(--border-light);
  margin: 0 0.5rem;
  transition: background var(--t-mid);
}
.step-line.done { background: var(--coral-300); }

.form-group {
  margin-bottom: 1.5rem;
}
.form-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-500);
  margin-bottom: 0.5rem;
}
.form-control {
  width: 100%;
  padding: 0.875rem 1.125rem;
  background: var(--sand-50);
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.95rem;
  color: var(--text-900);
  transition: border-color var(--t-fast), box-shadow var(--t-fast), background var(--t-fast);
}
.form-control:focus {
  outline: none;
  border-color: var(--coral-400);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(232,112,78,0.1);
}
.form-control::placeholder { color: var(--text-200); }
textarea.form-control { min-height: 130px; resize: vertical; }

select.form-control {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%237A6455' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

.form-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 2rem;
}

.btn-form-submit {
  width: 100%;
  padding: 1.05rem;
  font-size: 1rem;
  margin-top: 2rem;
  border-radius: var(--radius-sm);
}

/* Info panel */
.geo-panel { display: flex; flex-direction: column; gap: 1.75rem; }

.map-block {
  background: var(--sand-200);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-light);
  height: 260px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.map-grid-svg {
  position: absolute; inset: 0; width: 100%; height: 100%;
  opacity: 0.45;
}
.map-marker-wrap {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}
.map-marker {
  width: 20px; height: 20px;
  background: var(--gradient-coral);
  border-radius: 50%;
  border: 3px solid #fff;
  box-shadow: 0 0 0 6px rgba(232,112,78,0.2), 0 0 0 12px rgba(232,112,78,0.08);
  animation: map-pulse 2.5s infinite;
}
@keyframes map-pulse {
  0%, 100% { box-shadow: 0 0 0 4px rgba(232,112,78,0.25), 0 0 0 8px rgba(232,112,78,0.1); }
  50%       { box-shadow: 0 0 0 8px rgba(232,112,78,0.2), 0 0 0 16px rgba(232,112,78,0.05); }
}
.map-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-700);
  background: rgba(255,255,255,0.85);
  padding: 0.3rem 0.75rem;
  border-radius: 100px;
  border: 1px solid var(--border-light);
  backdrop-filter: blur(8px);
}

.contact-panel {
  background: rgba(255,255,255,0.8);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: 2.25rem;
  backdrop-filter: blur(16px);
}
.contact-panel-row {
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.contact-panel-row:last-child { border-bottom: none; padding-bottom: 0; }

.cp-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--text-300);
}
.cp-value {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-900);
}

/* ── Legal Section ───────────────────────────────────────── */
.legal-section {
  border-top: 1px solid var(--border-light);
  background: var(--sand-100);
  padding: 4.5rem 0;
}

.legal-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 2.5rem;
}
.legal-tab {
  padding: 0.6rem 1.35rem;
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 600;
  border: 1.5px solid var(--border-light);
  background: #fff;
  color: var(--text-500);
  transition: all var(--t-fast);
}
.legal-tab.active {
  background: var(--text-900);
  color: var(--sand-50);
  border-color: var(--text-900);
}

.legal-panel { display: none; }
.legal-panel.active {
  display: block;
  animation: fadeUp 0.3s var(--ease-out) forwards;
}

.legal-scroll {
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  max-height: 480px;
  overflow-y: auto;
}
.legal-scroll::-webkit-scrollbar { width: 6px; }
.legal-scroll::-webkit-scrollbar-track { background: var(--sand-100); border-radius: 10px; }
.legal-scroll::-webkit-scrollbar-thumb { background: var(--sand-300); border-radius: 10px; }

.legal-h2 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}
.legal-date {
  font-size: 0.82rem;
  color: var(--text-300);
  margin-bottom: 2rem;
}
.legal-h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-700);
  margin: 1.75rem 0 0.5rem;
}
.legal-p {
  font-size: 0.9rem;
  color: var(--text-500);
  line-height: 1.75;
}

/* ── Modals ──────────────────────────────────────────────── */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(26, 18, 8, 0.45);
  backdrop-filter: blur(6px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}
.modal-overlay.open { display: flex; animation: fadeOverlay 0.25s var(--ease-out) forwards; }

@keyframes fadeOverlay {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.modal-box {
  background: var(--warm-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: 2.75rem;
  max-width: 560px;
  width: 100%;
  box-shadow: var(--shadow-lg);
  position: relative;
  animation: slideModal 0.35s var(--ease-spring) forwards;
}
@keyframes slideModal {
  from { opacity: 0; transform: translateY(30px) scale(0.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-close {
  position: absolute;
  top: 1.25rem; right: 1.25rem;
  width: 34px; height: 34px;
  border-radius: 50%;
  background: var(--sand-200);
  color: var(--text-500);
  font-size: 1.1rem;
  display: flex; align-items: center; justify-content: center;
  transition: background var(--t-fast), color var(--t-fast);
}
.modal-close:hover { background: var(--sand-300); color: var(--text-900); }

.modal-box h2 {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}
.modal-box p { color: var(--text-500); margin-bottom: 1.75rem; }

/* ── Cookie Banner ───────────────────────────────────────── */
.cookie-banner {
  position: fixed;
  bottom: 1.5rem; left: 50%;
  transform: translateX(-50%);
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.75rem;
  max-width: 680px;
  width: calc(100% - 2rem);
  box-shadow: var(--shadow-lg);
  z-index: 950;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  animation: slideUp 0.5s var(--ease-spring) forwards;
}
@keyframes slideUp {
  from { opacity: 0; transform: translateX(-50%) translateY(30px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}
.cookie-banner.dismissed {
  animation: slideDown 0.3s var(--ease-out) forwards;
}
@keyframes slideDown {
  to { opacity: 0; transform: translateX(-50%) translateY(30px); pointer-events: none; }
}
.cookie-text { flex: 1; font-size: 0.875rem; color: var(--text-500); }
.cookie-text strong { color: var(--text-900); }
.cookie-btns { display: flex; gap: 0.625rem; flex-shrink: 0; }

/* ── Estimate Drawer ─────────────────────────────────────── */
.estimate-drawer {
  position: fixed;
  right: 0; top: 50%; transform: translateY(-50%);
  z-index: 920;
}
.drawer-tab {
  position: absolute;
  right: 0; top: 50%;
  transform: translateY(-50%);
  background: var(--gradient-coral);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  writing-mode: vertical-lr;
  text-orientation: mixed;
  padding: 1.25rem 0.75rem;
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
  cursor: pointer;
  box-shadow: var(--shadow-coral);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: padding var(--t-fast), box-shadow var(--t-fast);
}
.drawer-tab:hover { padding: 1.5rem 0.75rem; box-shadow: 0 18px 40px rgba(232,112,78,0.38); }

.drawer-panel {
  position: absolute;
  right: 0; top: 50%; transform: translateY(-50%);
  width: 360px;
  background: var(--warm-white);
  border: 1px solid var(--border-light);
  border-right: none;
  border-radius: var(--radius-lg) 0 0 var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-lg);
  transition: transform var(--t-mid) var(--ease-out), opacity var(--t-mid);
  transform: translateY(-50%) translateX(100%);
  opacity: 0;
  pointer-events: none;
}
.drawer-panel.open {
  transform: translateY(-50%) translateX(0);
  opacity: 1;
  pointer-events: auto;
}

.drawer-panel h3 {
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}
.drawer-panel p { font-size: 0.875rem; color: var(--text-500); margin-bottom: 1.5rem; }
.drawer-close {
  position: absolute;
  top: 1rem; right: 1rem;
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--sand-200);
  font-size: 0.9rem;
  color: var(--text-500);
  display: flex; align-items: center; justify-content: center;
}
.drawer-close:hover { background: var(--sand-300); color: var(--text-900); }

/* ── Footer ──────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border-light);
  background: var(--sand-100);
  padding: 3.5rem 0;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  text-align: center;
}

.footer-brand {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.footer-scale {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--coral-500);
}

.footer-links {
  display: flex;
  gap: 0.25rem;
  flex-wrap: wrap;
  justify-content: center;
}
.footer-links a {
  font-size: 0.85rem;
  color: var(--text-500);
  padding: 0.25rem 0.75rem;
  border-radius: 100px;
  transition: color var(--t-fast), background var(--t-fast);
}
.footer-links a:hover { color: var(--text-900); background: var(--sand-200); }

.footer-copy {
  font-size: 0.8rem;
  color: var(--text-300);
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 900px) {
  .hero-grid,
  .scope-inner,
  .contact-grid,
  .service-row,
  .diag-grid {
    grid-template-columns: 1fr;
  }
  .service-row.reverse .service-visual { order: 0; }

  .cap-grid       { grid-template-columns: 1fr 1fr; }
  .projects-grid  { grid-template-columns: 1fr 1fr; }
  .metrics-grid   { grid-template-columns: repeat(2, 1fr); }
  .metric:nth-child(2) { border-right: none; }
  .metric:nth-child(3) { border-top: 1px solid var(--border-light); }

  .airflow-canvas-wrap { max-height: 340px; }

  .hero h1 { font-size: 2.5rem; }

  .cookie-banner { flex-direction: column; text-align: center; }
  .cookie-btns { justify-content: center; }

  .estimate-drawer { display: none; }
  
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
}

@media (max-width: 600px) {
  .cap-grid, .projects-grid { grid-template-columns: 1fr; }
  .teasers-grid { grid-template-columns: 1fr; }
  .scope-bullets { grid-template-columns: 1fr; }
  .hero-ctas { flex-direction: column; }
  .hero-ctas .btn { width: 100%; justify-content: center; }
  .modal-box { padding: 1.75rem; }
}