/* ============================================
   ÁRVÔS — Site Institucional
   Dark Industrial Theme
   ============================================ */

:root {
  --bg: #0a0e17;
  --bg-card: #111827;
  --bg-card-hover: #1a2234;
  --surface: #151d2e;
  --border: #1e293b;
  --border-light: #2d3a4f;
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --accent: #3b82f6;
  --accent-light: #60a5fa;
  --accent-dark: #2563eb;
  --cyan: #06b6d4;
  --gold: #c8a45a;
  --success: #10b981;
  --gradient: linear-gradient(135deg, #3b82f6, #06b6d4);
  --gradient-gold: linear-gradient(135deg, #c8a45a, #f0d080);
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 30px rgba(0,0,0,.3);
  --font: 'Inter', -apple-system, system-ui, sans-serif;
  --mono: 'JetBrains Mono', monospace;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

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

/* NAV */
#nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 14, 23, .8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: background .3s;
}
#nav.scrolled {
  background: rgba(10, 14, 23, .95);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: inline-flex;
  align-items: center;
}
.nav-logo img {
  height: 40px;
  width: auto;
  display: block;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-links a {
  font-size: .875rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color .2s;
}
.nav-links a:hover { color: var(--text); }
.btn-nav {
  background: var(--gradient) !important;
  color: #fff !important;
  padding: 8px 20px !important;
  border-radius: 8px;
  font-weight: 600 !important;
  transition: opacity .2s !important;
}
.btn-nav:hover { opacity: .9; }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text);
  transition: .3s;
}

/* HERO */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(140,170,200,.18) 0%, transparent 60%),
    radial-gradient(ellipse 50% 40% at 30% 10%, rgba(59,130,246,.12) 0%, transparent 50%),
    radial-gradient(ellipse 50% 40% at 70% 15%, rgba(6,182,212,.10) 0%, transparent 50%),
    radial-gradient(ellipse 100% 50% at 50% 0%, rgba(180,200,220,.08) 0%, transparent 40%);
  pointer-events: none;
}
.hero-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(160,185,210,.06) 0%, transparent 50%);
  pointer-events: none;
}
.hero-content { position: relative; text-align: center; }
.hero-logo {
  margin-bottom: 32px;
  display: flex;
  justify-content: center;
  align-items: center;
}
.hero-logo img {
  max-width: 580px;
  width: 90%;
  height: auto;
  display: block;
  margin: 0 auto;
  filter: drop-shadow(0 10px 35px rgba(59,130,246,.25));
}
.hero-badge {
  display: inline-block;
  font-family: var(--mono);
  font-size: .8rem;
  font-weight: 500;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--cyan);
  border: 1px solid rgba(6,182,212,.3);
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 32px;
}
#hero h1 {
  font-size: clamp(2.5rem, 5.5vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -.02em;
  margin-bottom: 24px;
}
.hero-sub {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto 40px;
  line-height: 1.7;
}
.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 64px;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gradient);
  color: #fff;
  padding: 14px 28px;
  border-radius: 10px;
  font-weight: 600;
  font-size: .95rem;
  transition: transform .2s, box-shadow .2s;
  border: none;
  cursor: pointer;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(59,130,246,.3);
}
.btn-primary.large { padding: 16px 36px; font-size: 1rem; }
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--text);
  padding: 14px 28px;
  border-radius: 10px;
  font-weight: 600;
  font-size: .95rem;
  border: 1px solid var(--border-light);
  transition: border-color .2s, background .2s;
  cursor: pointer;
}
.btn-ghost:hover {
  border-color: var(--accent);
  background: rgba(59,130,246,.06);
}
.btn-ghost.large { padding: 16px 36px; font-size: 1rem; }

.hero-stats {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 40px;
  flex-wrap: wrap;
}
.stat { text-align: center; }
.stat-value {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label {
  font-size: .8rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
}
.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

/* SECTIONS */
section {
  padding: 120px 0;
}
section:nth-child(even) {
  background: var(--surface);
}
.section-header {
  text-align: center;
  margin-bottom: 64px;
}
.section-tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: .75rem;
  font-weight: 500;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 16px;
}
.section-header h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -.02em;
  margin-bottom: 16px;
}
.section-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto;
}

/* PROBLEM */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}
.problem-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  transition: border-color .3s, transform .3s;
}
.problem-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}
.problem-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: rgba(59,130,246,.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  color: var(--accent-light);
}
.problem-value {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--gold);
  margin-bottom: 8px;
}
.problem-card p { font-size: .9rem; color: var(--text-muted); }
.problem-conclusion {
  text-align: center;
  font-size: 1.05rem;
  color: var(--text-muted);
}
.problem-conclusion strong { color: var(--text); }

/* SOLUTION */
.solution-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 40px;
}
.solution-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 28px 32px;
  transition: border-color .3s, transform .3s;
}
.solution-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}
.solution-card.featured {
  border-color: var(--accent);
  background: linear-gradient(180deg, rgba(59,130,246,.06) 0%, var(--bg-card) 40%);
}
.solution-number {
  font-family: var(--mono);
  font-size: .85rem;
  font-weight: 600;
  color: var(--accent-light);
  margin-bottom: 20px;
}
.solution-icon-wrap {
  color: var(--cyan);
  margin-bottom: 20px;
}
.solution-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.solution-card > p {
  font-size: .95rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}
.solution-features li {
  position: relative;
  padding-left: 20px;
  font-size: .875rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}
.solution-features li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--accent-light);
}
.solution-footer {
  text-align: center;
  font-size: 1.05rem;
  color: var(--text-muted);
}
.solution-footer strong { color: var(--text); }

/* TECHNOLOGY */
.flow-container {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 12px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}
.flow-step {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 20px;
  max-width: 220px;
  text-align: center;
  flex: 1;
  min-width: 180px;
  transition: border-color .3s, transform .3s;
}
.flow-step:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}
.flow-step.highlight {
  border-color: var(--cyan);
  background: linear-gradient(180deg, rgba(6,182,212,.08) 0%, var(--bg-card) 50%);
}
.flow-num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .85rem;
  font-weight: 700;
  color: #fff;
  margin: 0 auto 14px;
}
.flow-step h4 { font-size: .95rem; margin-bottom: 8px; }
.flow-step p { font-size: .82rem; color: var(--text-muted); }
.flow-arrow {
  display: flex;
  align-items: center;
  color: var(--text-dim);
  padding-top: 40px;
}
.tech-badge {
  text-align: center;
  font-family: var(--mono);
  font-size: .8rem;
  letter-spacing: 1px;
  color: var(--cyan);
  border: 1px solid rgba(6,182,212,.25);
  padding: 12px 24px;
  border-radius: 100px;
  display: inline-block;
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
  display: block;
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

/* COMPARE TABLE */
.compare-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .9rem;
}
.compare-table th,
.compare-table td {
  padding: 16px 20px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.compare-table th {
  background: var(--bg-card);
  font-weight: 600;
  color: var(--text-muted);
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .5px;
}
.compare-table td:first-child {
  text-align: left;
  font-weight: 500;
}
.compare-table td { color: var(--text-dim); }
.compare-table .highlight-col {
  background: rgba(59,130,246,.06);
  color: var(--accent-light);
  font-weight: 600;
}
.compare-table .highlight-col.check {
  color: var(--success);
  font-size: 1.2rem;
}
.compare-table th.highlight-col {
  background: rgba(59,130,246,.12);
  color: var(--accent-light);
}
.compare-table tbody tr:last-child td { border-bottom: none; }

/* VALIDATION */
.validation-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}
.validation-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
}
.validation-value {
  display: block;
  font-size: 3rem;
  font-weight: 900;
  background: var(--gradient-gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.validation-label {
  display: block;
  font-size: .85rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}
.validation-card p {
  font-size: .82rem;
  color: var(--text-dim);
}

.testimonial {
  background: var(--bg-card);
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 32px 36px;
  margin-bottom: 48px;
}
.testimonial p {
  font-size: 1.15rem;
  font-style: italic;
  color: var(--text);
  margin-bottom: 12px;
}
.testimonial cite {
  font-size: .85rem;
  color: var(--text-dim);
  font-style: normal;
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 64px;
}
.result-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  transition: border-color .3s;
}
.result-card:hover { border-color: var(--accent); }
.result-value {
  display: block;
  font-size: 2.2rem;
  font-weight: 900;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}
.result-label { font-size: .82rem; color: var(--text-muted); }

.subsection-title {
  text-align: center;
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 32px;
}

.expertise-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}
.expertise-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  transition: border-color .3s;
}
.expertise-item:hover { border-color: var(--cyan); }
.expertise-item span {
  display: block;
  font-weight: 600;
  font-size: .9rem;
  margin-bottom: 4px;
}
.expertise-item small {
  font-size: .75rem;
  color: var(--text-dim);
}

/* PLANS */
.plans-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: start;
}
.plan-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 28px 32px;
  position: relative;
  transition: border-color .3s, transform .3s;
}
.plan-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}
.plan-card.recommended {
  border-color: var(--accent);
  background: linear-gradient(180deg, rgba(59,130,246,.08) 0%, var(--bg-card) 40%);
  transform: scale(1.04);
}
.plan-card.recommended:hover { transform: scale(1.04) translateY(-4px); }
.plan-tag {
  font-family: var(--mono);
  font-size: .7rem;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 12px;
}
.plan-card h3 {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 10px;
}
.plan-desc {
  font-size: .9rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}
.plan-features li {
  position: relative;
  padding-left: 22px;
  font-size: .875rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}
.plan-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--success);
  font-weight: 700;
}
.plan-target {
  font-size: .8rem;
  color: var(--text-dim);
  margin: 20px 0 24px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
.btn-plan {
  display: block;
  text-align: center;
  padding: 12px;
  border-radius: 10px;
  font-weight: 600;
  font-size: .9rem;
  border: 1px solid var(--border-light);
  color: var(--text);
  transition: border-color .2s, background .2s;
}
.btn-plan:hover {
  border-color: var(--accent);
  background: rgba(59,130,246,.06);
}
.plan-card.recommended .btn-plan {
  background: var(--gradient);
  border: none;
  color: #fff;
}
.plan-card.recommended .btn-plan:hover {
  opacity: .9;
}

/* ABOUT */
.about-content {
  display: flex;
  gap: 48px;
  align-items: flex-start;
  margin-bottom: 64px;
}
.about-text {
  flex: 1;
}
.about-text p {
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  line-height: 1.8;
}
.about-text strong { color: var(--text); }
.about-certs {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  flex-shrink: 0;
}
.cert-badge {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 16px;
  font-size: .8rem;
  font-weight: 600;
  color: var(--gold);
  white-space: nowrap;
}

.timeline {
  display: flex;
  gap: 0;
  overflow-x: auto;
  padding-bottom: 8px;
}
.timeline-item {
  flex: 1;
  min-width: 160px;
  padding: 20px 16px;
  border-top: 3px solid var(--border);
  position: relative;
  transition: border-color .3s;
}
.timeline-item::before {
  content: '';
  position: absolute;
  top: -7px;
  left: 20px;
  width: 10px;
  height: 10px;
  background: var(--border);
  border-radius: 50%;
  transition: background .3s;
}
.timeline-item.active {
  border-color: var(--accent);
}
.timeline-item.active::before {
  background: var(--accent);
  box-shadow: 0 0 12px rgba(59,130,246,.5);
}
.tl-year {
  display: block;
  font-family: var(--mono);
  font-size: .85rem;
  font-weight: 700;
  color: var(--accent-light);
  margin-bottom: 6px;
}
.timeline-item span:last-child {
  font-size: .82rem;
  color: var(--text-muted);
}

/* CTA */
#contato {
  padding: 120px 0;
}
.cta-wrap {
  text-align: center;
  background: linear-gradient(180deg, rgba(59,130,246,.06) 0%, transparent 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 72px 48px;
}
.cta-wrap h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 48px;
}
.cta-steps {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}
.cta-step {
  display: flex;
  align-items: center;
  gap: 12px;
}
.cta-step-num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .8rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.cta-step span {
  font-size: .95rem;
  font-weight: 500;
}
.cta-contacts {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 24px;
}
.cta-url {
  font-size: .9rem;
  color: var(--text-dim);
}
.cta-url a { color: inherit; }
.cta-url a:hover { color: var(--text-muted); }

/* FOOTER */
footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 64px 0 0;
}
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-brand img {
  height: 38px;
  width: auto;
  display: block;
  margin-bottom: 12px;
}
.footer-brand p {
  font-size: .9rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.footer-brand small {
  font-size: .75rem;
  color: var(--text-dim);
  line-height: 1.6;
}
.footer-links h4 {
  font-size: .8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-dim);
  margin-bottom: 16px;
}
.footer-links a {
  display: block;
  font-size: .85rem;
  color: var(--text-muted);
  margin-bottom: 10px;
  transition: color .2s;
}
.footer-links a:hover { color: var(--accent-light); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  text-align: center;
}
.footer-bottom p {
  font-size: .78rem;
  color: var(--text-dim);
}

/* ANIMATIONS */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s ease-out, transform .6s ease-out;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* RESPONSIVE */
@media (max-width: 1024px) {
  .problem-grid { grid-template-columns: repeat(2, 1fr); }
  .results-grid { grid-template-columns: repeat(2, 1fr); }
  .expertise-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(10, 14, 23, .98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--border);
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }
  .nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle.active span:nth-child(2) { opacity: 0; }
  .nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  section { padding: 80px 0; }
  .hero-stats { gap: 24px; }
  .stat-divider { display: none; }
  .solution-grid { grid-template-columns: 1fr; max-width: 440px; margin: 0 auto 40px; }
  .plan-card.recommended { transform: none; }
  .plan-card.recommended:hover { transform: translateY(-4px); }
  .plans-grid { grid-template-columns: 1fr; max-width: 440px; margin: 0 auto; }
  .validation-grid { grid-template-columns: 1fr; }
  .results-grid { grid-template-columns: 1fr 1fr; }
  .expertise-grid { grid-template-columns: 1fr 1fr; }
  .about-content { flex-direction: column; }
  .flow-arrow { display: none; }
  .flow-container { flex-direction: column; align-items: center; }
  .flow-step { max-width: 100%; width: 100%; }
  .footer-inner { grid-template-columns: 1fr; }
  .cta-wrap { padding: 48px 24px; }
  .compare-table { font-size: .78rem; }
  .compare-table th, .compare-table td { padding: 12px 10px; }
  .timeline { flex-direction: column; }
  .timeline-item { border-top: none; border-left: 3px solid var(--border); padding: 8px 0 20px 24px; min-width: unset; }
  .timeline-item::before { top: 12px; left: -7px; }
  .timeline-item.active { border-left-color: var(--accent); }
}

@media (max-width: 480px) {
  .problem-grid { grid-template-columns: 1fr; }
  .results-grid { grid-template-columns: 1fr; }
  .expertise-grid { grid-template-columns: 1fr; }
  .hero-stats { flex-direction: column; }
  .cta-steps { flex-direction: column; align-items: center; }
}

.wa-float {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 80;
  display: flex;
  align-items: center;
  gap: 8px;
  background: #25d366;
  color: #052e16;
  font-weight: 700;
  font-size: .85rem;
  padding: 12px 16px 12px 14px;
  border-radius: 999px;
  text-decoration: none;
  box-shadow: 0 8px 28px rgba(37, 211, 102, .35);
}
.wa-float:hover { filter: brightness(1.08); }
.wa-float svg { flex-shrink: 0; }