/* ============================================================
   LUMINI INDUSTRIAL — style.css
   Industrial B2B · São Paulo, Brasil
   ============================================================ */

/* ── Variables ─────────────────────────────────────────────── */
:root {
  /* Core palette */
  --c-bg: #0e0f11;
  --c-surface: #141619;
  --c-surface2: #1a1d21;
  --c-border: #252830;
  --c-border2: #2e323b;

  /* Light sections */
  --c-light: #f4f5f6;
  --c-light-surface: #eaebec;

  /* Text */
  --c-text: #e8eaed;
  --c-text-muted: #8b919e;
  --c-text-light: #1a1d21;

  /* Accent — amber/gold metallic */
  --c-accent: #c8970a;
  --c-accent-bright: #e8b020;
  --c-accent-dim: #8a6508;

  /* WhatsApp green */
  --c-wa: #22a65a;
  --c-wa-hover: #1b8f4a;

  /* Typography */
  --font-display: 'Barlow Condensed', sans-serif;
  --font-body: 'Barlow', sans-serif;

  /* Spacing */
  --section-pad: 96px;
  --container: 1200px;
  --radius: 4px;
  --radius-lg: 8px;

  /* Transitions */
  --t: 0.22s ease;
}

/* ── Reset ──────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-body);
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }
input, textarea { font: inherit; }

/* ── Container ─────────────────────────────────────────────── */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Section helpers ────────────────────────────────────────── */
.section { padding: var(--section-pad) 0; }

.section--dark {
  background: var(--c-surface);
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
}

.section--light {
  background: var(--c-light);
  color: var(--c-text-light);
}

.section--light .section-tag { color: var(--c-accent-dim); }
.section--light .section-title { color: var(--c-text-light); }
.section--light .section-sub { color: #4a5060; }

/* ── Section header ─────────────────────────────────────────── */
.section-header {
  max-width: 680px;
  margin: 0 auto 60px;
  text-align: center;
}
.section-tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 14px;
  padding: 5px 14px;
  border: 1px solid var(--c-accent-dim);
  border-radius: var(--radius);
}
.section-tag--light {
  color: var(--c-accent);
  border-color: var(--c-accent-dim);
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--c-text);
  margin-bottom: 16px;
}
.section-sub {
  font-size: 16px;
  color: var(--c-text-muted);
  line-height: 1.65;
}

/* ── Buttons ────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 12px 24px;
  border-radius: var(--radius);
  transition: background var(--t), color var(--t), border-color var(--t), transform var(--t), box-shadow var(--t);
  white-space: nowrap;
  border: 2px solid transparent;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--c-accent);
  color: #0e0f11;
}
.btn-primary:hover { background: var(--c-accent-bright); }

.btn-whatsapp {
  background: var(--c-wa);
  color: #fff;
  border-color: var(--c-wa);
}
.btn-whatsapp:hover { background: var(--c-wa-hover); border-color: var(--c-wa-hover); }

.btn-outline {
  background: transparent;
  color: var(--c-text);
  border-color: var(--c-border2);
}
.btn-outline:hover {
  border-color: var(--c-accent);
  color: var(--c-accent);
}

.btn-outline-light {
  background: transparent;
  color: var(--c-text);
  border-color: rgba(255,255,255,0.25);
}
.btn-outline-light:hover {
  border-color: var(--c-accent);
  color: var(--c-accent);
}

.btn-service {
  background: transparent;
  color: var(--c-accent);
  border-color: var(--c-accent-dim);
  font-size: 13px;
  padding: 10px 20px;
  margin-top: auto;
}
.btn-service:hover {
  background: var(--c-accent);
  color: #0e0f11;
  border-color: var(--c-accent);
}

.btn-lg { padding: 16px 32px; font-size: 15px; }
.btn-full { width: 100%; justify-content: center; }

/* ── Header ─────────────────────────────────────────────────── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(14,15,17,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--c-border);
  transition: background var(--t), box-shadow var(--t);
}
.site-header.scrolled {
  background: rgba(14,15,17,0.98);
  box-shadow: 0 2px 24px rgba(0,0,0,0.4);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 68px;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  text-decoration: none;
}
.logo-mark {
  color: var(--c-accent);
  font-size: 18px;
  line-height: 1;
}
.logo-text {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-text);
}
.logo-text strong {
  font-weight: 800;
  color: var(--c-accent);
}

/* Nav */
.main-nav { margin-left: auto; }
.main-nav ul {
  display: flex;
  gap: 2px;
}
.main-nav a {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-text-muted);
  padding: 8px 14px;
  border-radius: var(--radius);
  transition: color var(--t), background var(--t);
}
.main-nav a:hover {
  color: var(--c-text);
  background: var(--c-surface2);
}

.header-cta { flex-shrink: 0; }

/* Menu toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  margin-left: auto;
}
.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--c-text);
  border-radius: 2px;
  transition: transform var(--t), opacity var(--t);
}
.menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Hero ───────────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  overflow: hidden;
  background: var(--c-bg);
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--c-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--c-border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.35;
  pointer-events: none;
}

.hero-accent-bar {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--c-accent), transparent);
  pointer-events: none;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-accent);
  background: rgba(200, 151, 10, 0.08);
  border: 1px solid rgba(200, 151, 10, 0.25);
  padding: 7px 16px;
  border-radius: var(--radius);
  margin-bottom: 28px;
}

.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(44px, 6vw, 78px);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.02em;
  color: var(--c-text);
  margin-bottom: 24px;
}
.hero-headline em {
  font-style: normal;
  color: var(--c-accent);
}

.hero-sub {
  font-size: 17px;
  color: var(--c-text-muted);
  line-height: 1.65;
  max-width: 500px;
  margin-bottom: 40px;
}

.hero-ctas {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 44px;
}

.hero-bullets {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
}
.hero-bullets li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--c-text-muted);
  text-transform: uppercase;
}
.bullet-icon {
  color: var(--c-accent);
  font-size: 12px;
}

/* Hero visual */
.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-diagram {
  position: relative;
  width: 360px;
  height: 360px;
}
.diagram-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid var(--c-border2);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: spin linear infinite;
}
.r1 { width: 340px; height: 340px; animation-duration: 40s; border-color: rgba(200,151,10,0.12); }
.r2 { width: 240px; height: 240px; animation-duration: 28s; animation-direction: reverse; border-color: rgba(200,151,10,0.20); }
.r3 { width: 140px; height: 140px; animation-duration: 18s; border-color: rgba(200,151,10,0.30); }
@keyframes spin { to { transform: translate(-50%, -50%) rotate(360deg); } }

.diagram-core {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 64px;
  height: 64px;
  background: var(--c-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: #0e0f11;
  box-shadow: 0 0 40px rgba(200,151,10,0.35);
}

.diagram-label {
  position: absolute;
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-text-muted);
  background: var(--c-surface2);
  border: 1px solid var(--c-border2);
  padding: 5px 12px;
  border-radius: var(--radius);
}
.l1 { top: 10px; left: 50%; transform: translateX(-50%); }
.l2 { bottom: 28px; left: 20px; }
.l3 { bottom: 28px; right: 20px; }

/* ── Trust strip ────────────────────────────────────────────── */
.trust-strip {
  background: var(--c-surface);
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
  padding: 20px 0;
}
.trust-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0;
}
.trust-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 28px;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-text-muted);
}
.trust-icon { color: var(--c-accent); font-size: 10px; }
.trust-divider {
  width: 1px;
  height: 20px;
  background: var(--c-border2);
  flex-shrink: 0;
}

/* ── Services ───────────────────────────────────────────────── */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  background: var(--c-border);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.service-card {
  background: var(--c-surface);
  padding: 40px 36px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: background var(--t);
}
.service-card:hover { background: var(--c-surface2); }

.service-card--featured {
  background: var(--c-surface2);
  border-top: 3px solid var(--c-accent);
  padding-top: 37px;
}

.service-number {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--c-accent);
  opacity: 0.6;
}

.service-icon-wrap {
  color: var(--c-accent);
  opacity: 0.8;
}

.service-title {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 800;
  color: var(--c-text);
  line-height: 1.15;
}

.service-desc {
  font-size: 14px;
  color: var(--c-text-muted);
  line-height: 1.65;
}

.service-specs {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-left: 0;
}
.service-specs li {
  font-size: 13px;
  color: var(--c-text-muted);
  padding-left: 16px;
  position: relative;
}
.service-specs li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--c-accent);
  font-size: 10px;
}

.service-use {
  font-size: 13px;
  color: var(--c-text-muted);
  background: rgba(200,151,10,0.05);
  border-left: 2px solid var(--c-accent-dim);
  padding: 10px 14px;
  border-radius: 0 var(--radius) var(--radius) 0;
  line-height: 1.55;
  flex-grow: 1;
}
.service-use strong { color: var(--c-accent); }

/* ── Materials ──────────────────────────────────────────────── */
.materials-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.materials-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px;
  background: var(--c-border);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.material-card {
  background: var(--c-surface2);
  padding: 28px 32px;
  display: flex;
  gap: 20px;
  align-items: flex-start;
}
.material-symbol {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 800;
  color: var(--c-accent);
  min-width: 48px;
  opacity: 0.75;
  letter-spacing: -0.02em;
}
.material-card h3 {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 6px;
}
.material-card p {
  font-size: 13px;
  color: var(--c-text-muted);
  line-height: 1.6;
}

.capabilities-list h3.cap-title {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 28px;
}

.capabilities-list ul {
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.capabilities-list li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.cap-icon {
  color: var(--c-accent);
  font-size: 16px;
  flex-shrink: 0;
  margin-top: 2px;
  font-family: var(--font-display);
  font-weight: 700;
}
.capabilities-list li div {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.capabilities-list li strong {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  color: var(--c-text);
}
.capabilities-list li span {
  font-size: 14px;
  color: var(--c-text-muted);
  line-height: 1.55;
}

.section--dark .section-title { color: var(--c-text); }
.section--dark .section-sub { color: var(--c-text-muted); }

/* ── Industries ─────────────────────────────────────────────── */
.industries-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  background: var(--c-border);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 32px;
}

.industry-card {
  background: var(--c-surface);
  padding: 32px 28px;
  transition: background var(--t);
}
.industry-card:hover { background: var(--c-surface2); }

.industry-icon {
  color: var(--c-accent);
  margin-bottom: 16px;
  opacity: 0.75;
}
.industry-card h3 {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 10px;
}
.industry-card p {
  font-size: 14px;
  color: var(--c-text-muted);
  line-height: 1.6;
}

.industries-note {
  font-size: 14px;
  color: var(--c-text-muted);
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-left: 3px solid var(--c-accent-dim);
  padding: 16px 20px;
  border-radius: 0 var(--radius) var(--radius) 0;
}
.industries-note strong { color: var(--c-text); }

/* ── Process ────────────────────────────────────────────────── */
.process-steps {
  display: flex;
  align-items: flex-start;
  gap: 0;
  margin-bottom: 52px;
  position: relative;
}

.process-step {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 0 24px;
}
.process-step:first-child { padding-left: 0; }
.process-step:last-child { padding-right: 0; }

.step-num {
  font-family: var(--font-display);
  font-size: 48px;
  font-weight: 800;
  color: var(--c-accent);
  line-height: 1;
  opacity: 0.3;
}

.step-content h3 {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--c-text-light);
  margin-bottom: 8px;
}
.step-content p {
  font-size: 14px;
  color: #4a5060;
  line-height: 1.6;
}

.process-connector {
  width: 40px;
  height: 2px;
  background: linear-gradient(90deg, var(--c-accent-dim), var(--c-accent));
  flex-shrink: 0;
  margin-top: 28px;
  opacity: 0.5;
}

.process-cta { text-align: center; }

/* ── Differentials ──────────────────────────────────────────── */
.diff-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  background: var(--c-border);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.diff-item {
  background: var(--c-surface);
  padding: 36px 32px;
  transition: background var(--t);
}
.diff-item:hover { background: var(--c-surface2); }

.diff-icon {
  font-size: 14px;
  color: var(--c-accent);
  margin-bottom: 16px;
  display: block;
}

.diff-item h3 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 10px;
}
.diff-item p {
  font-size: 14px;
  color: var(--c-text-muted);
  line-height: 1.6;
}

/* ── Lead section ───────────────────────────────────────────── */
.lead-layout {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 80px;
  align-items: start;
}

.lead-copy .section-title {
  text-align: left;
  margin-bottom: 16px;
  font-size: clamp(24px, 3.5vw, 36px);
}
.lead-copy p {
  font-size: 15px;
  color: var(--c-text-muted);
  line-height: 1.65;
  margin-bottom: 36px;
}

.lead-whatsapp p {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-text-muted);
  margin-bottom: 14px;
}

/* Form */
.lead-form-wrap {
  background: var(--c-surface2);
  border: 1px solid var(--c-border2);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.lead-form {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.form-row { display: flex; flex-direction: column; gap: 18px; }
.form-row--half { flex-direction: row; gap: 18px; }
.form-row--half .form-group { flex: 1; }

.form-group {
  display: flex;
  flex-direction: column;
  gap: 7px;
}
.form-group label {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-text-muted);
}
.form-group input,
.form-group textarea {
  background: var(--c-bg);
  border: 1px solid var(--c-border2);
  border-radius: var(--radius);
  color: var(--c-text);
  padding: 12px 16px;
  font-size: 14px;
  transition: border-color var(--t), box-shadow var(--t);
  outline: none;
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--c-accent);
  box-shadow: 0 0 0 3px rgba(200,151,10,0.12);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: #4a5060; }
.form-group textarea { resize: vertical; min-height: 100px; }
.form-group input.error,
.form-group textarea.error { border-color: #e05555; }

.form-note {
  font-size: 12px;
  color: var(--c-text-muted);
  text-align: center;
}

.form-success {
  background: rgba(34,166,90,0.1);
  border: 1px solid rgba(34,166,90,0.3);
  color: #5de89c;
  padding: 14px 18px;
  border-radius: var(--radius);
  font-size: 14px;
  text-align: center;
}

/* ── FAQ ────────────────────────────────────────────────────── */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 2px;
  background: var(--c-border);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.faq-item { background: var(--c-surface); }

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding: 22px 28px;
  text-align: left;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  color: var(--c-text);
  transition: background var(--t), color var(--t);
}
.faq-question:hover { background: var(--c-surface2); }
.faq-question[aria-expanded="true"] { color: var(--c-accent); }

.faq-chevron {
  font-family: var(--font-display);
  font-size: 22px;
  color: var(--c-accent);
  flex-shrink: 0;
  transition: transform var(--t);
  line-height: 1;
}
.faq-question[aria-expanded="true"] .faq-chevron {
  transform: rotate(45deg);
}

.faq-answer {
  display: none;
  padding: 0 28px 22px;
  font-size: 14px;
  color: var(--c-text-muted);
  line-height: 1.7;
}
.faq-answer.open { display: block; }

/* ── Final CTA ──────────────────────────────────────────────── */
.final-cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 60px;
  padding: 80px 24px;
}
.final-cta-text { flex: 1; }
.final-cta-text h2 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800;
  color: var(--c-text);
  margin-bottom: 16px;
  line-height: 1.1;
}
.final-cta-text p {
  font-size: 15px;
  color: var(--c-text-muted);
  line-height: 1.65;
  max-width: 480px;
}
.final-cta-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex-shrink: 0;
}

/* ── Footer ─────────────────────────────────────────────────── */
.site-footer {
  background: var(--c-bg);
  border-top: 1px solid var(--c-border);
  padding-top: 72px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 60px;
  padding-bottom: 60px;
  border-bottom: 1px solid var(--c-border);
}

.footer-brand .logo { margin-bottom: 16px; }
.footer-brand p {
  font-size: 14px;
  color: var(--c-text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  max-width: 280px;
}
.footer-whatsapp {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--c-wa);
  transition: color var(--t);
}
.footer-whatsapp:hover { color: #4de890; }

.site-footer h4 {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 20px;
}

.footer-nav ul,
.footer-services ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-nav a {
  font-size: 14px;
  color: var(--c-text-muted);
  transition: color var(--t);
}
.footer-nav a:hover { color: var(--c-text); }

.footer-services li {
  font-size: 14px;
  color: var(--c-text-muted);
}

.footer-contact p {
  font-size: 14px;
  color: var(--c-text-muted);
  margin-bottom: 8px;
}
.footer-contact a {
  color: var(--c-text-muted);
  transition: color var(--t);
}
.footer-contact a:hover { color: var(--c-accent); }
.footer-b2b-notice {
  display: inline-block;
  margin-top: 8px;
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-accent) !important;
  background: rgba(200,151,10,0.08);
  border: 1px solid rgba(200,151,10,0.2);
  padding: 5px 10px;
  border-radius: var(--radius);
}

.footer-bottom {
  padding: 20px 0;
}
.footer-bottom .container {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}
.footer-bottom p {
  font-size: 12px;
  color: var(--c-text-muted);
  opacity: 0.6;
}

/* ── Floating WhatsApp ──────────────────────────────────────── */
.float-whatsapp {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 90;
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--c-wa);
  color: #fff;
  padding: 14px 20px;
  border-radius: 50px;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  box-shadow: 0 4px 24px rgba(34,166,90,0.35);
  transition: background var(--t), transform var(--t), box-shadow var(--t);
}
.float-whatsapp:hover {
  background: var(--c-wa-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(34,166,90,0.45);
}
.float-whatsapp svg { flex-shrink: 0; }

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 1024px) {
  :root { --section-pad: 72px; }

  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { display: none; }
  .hero-headline { font-size: clamp(40px, 8vw, 60px); }
  .hero { min-height: auto; padding: 120px 0 72px; }

  .services-grid { grid-template-columns: 1fr; }
  .service-card--featured { border-top: 3px solid var(--c-accent); }

  .materials-layout { grid-template-columns: 1fr; gap: 40px; }
  .materials-grid { grid-template-columns: repeat(3, 1fr); }

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

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

  .process-steps { flex-direction: column; gap: 0; }
  .process-connector { width: 2px; height: 32px; margin-left: 24px; margin-top: 0; }
  .process-step { padding: 0 0 0 0; flex-direction: row; gap: 20px; padding-bottom: 8px; }
  .process-step .step-num { font-size: 32px; min-width: 56px; }

  .lead-layout { grid-template-columns: 1fr; gap: 48px; }

  .final-cta-inner { flex-direction: column; text-align: center; padding: 72px 24px; }
  .final-cta-text p { max-width: 100%; }

  .footer-inner { grid-template-columns: 1fr 1fr; gap: 40px; }
}

@media (max-width: 768px) {
  :root { --section-pad: 56px; }

  /* Header mobile */
  .header-cta { display: none; }
  .menu-toggle { display: flex; }

  .main-nav {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--c-surface);
    border-bottom: 1px solid var(--c-border);
    padding: 16px 0;
    margin-left: 0;
  }
  .main-nav.open { display: block; }
  .main-nav ul { flex-direction: column; gap: 0; padding: 0 16px; }
  .main-nav a { display: block; padding: 12px 16px; font-size: 14px; }

  /* Trust strip */
  .trust-inner { gap: 4px; }
  .trust-divider { display: none; }
  .trust-item { padding: 8px 12px; font-size: 11px; }

  /* Services */
  .services-grid { border-radius: var(--radius); }
  .service-card { padding: 28px 24px; }

  /* Materials */
  .materials-grid { grid-template-columns: 1fr; }
  .material-card { padding: 22px 20px; }

  /* Industries */
  .industries-grid { grid-template-columns: 1fr; }

  /* Diff */
  .diff-grid { grid-template-columns: 1fr; }

  /* Form */
  .form-row--half { flex-direction: column; }
  .lead-form-wrap { padding: 28px 20px; }

  /* CTA */
  .final-cta-actions { width: 100%; }
  .final-cta-actions .btn { width: 100%; justify-content: center; }

  /* Footer */
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom .container { flex-direction: column; align-items: center; text-align: center; }

  /* Float button */
  .float-whatsapp span { display: none; }
  .float-whatsapp { padding: 16px; border-radius: 50%; }
  .float-whatsapp svg { width: 28px; height: 28px; }
}

@media (max-width: 480px) {
  .hero-headline { font-size: 36px; }
  .hero-ctas { flex-direction: column; }
  .hero-ctas .btn { width: 100%; justify-content: center; }
  .hero-bullets { gap: 8px 16px; }

  .section-header { margin-bottom: 40px; }
  .section-header.section-header--left { text-align: left; }

  .faq-question { padding: 18px 20px; font-size: 14px; }
  .faq-answer { padding: 0 20px 18px; }
}