:root {
  --bg: #0D0F14;
  --surface: #13161C;
  --surface-raised: #1A1E26;
  --border: #1E2230;
  --accent: #F59E0B;
  --accent-dim: rgba(245, 158, 11, 0.12);
  --fg: #F0F2F5;
  --fg-muted: #7C8496;
  --fg-subtle: #3D4455;
  --warn: #EF4444;
  --ok: #22C55E;
}

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

html { font-size: 16px; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'Barlow', system-ui, sans-serif;
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* NAV */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 60px;
  border-bottom: 1px solid var(--border);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--fg);
}

.nav-tagline {
  font-size: 0.8rem;
  color: var(--fg-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* HERO */
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  padding: 80px 60px 100px;
  align-items: center;
  min-height: 580px;
}

.hero-eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.hero-headline {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 800;
  font-size: clamp(3rem, 5vw, 4.5rem);
  line-height: 0.95;
  letter-spacing: -0.01em;
  color: var(--fg);
  text-transform: uppercase;
  margin-bottom: 28px;
}

.hero-lede {
  font-size: 1.05rem;
  color: var(--fg-muted);
  line-height: 1.7;
  max-width: 440px;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 32px;
}

.stat-value {
  display: block;
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 800;
  font-size: 2rem;
  color: var(--accent);
}

.stat-label {
  display: block;
  font-size: 0.8rem;
  color: var(--fg-muted);
  max-width: 140px;
  line-height: 1.4;
  margin-top: 4px;
}

.stat-divider {
  width: 1px;
  height: 48px;
  background: var(--border);
}

/* GAUGE */
.hero-right {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.gauge-container {
  position: relative;
  width: 280px;
  height: 280px;
}

.gauge-ring {
  width: 100%;
  height: 100%;
}

.gauge-center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}

.gauge-value {
  display: block;
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 800;
  font-size: 3.5rem;
  color: var(--fg);
  line-height: 1;
}

.gauge-unit {
  display: block;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--accent);
  text-transform: uppercase;
  margin-top: 4px;
}

/* ALERT CARD */
.alert-card {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 18px;
  width: 100%;
  max-width: 320px;
}

.alert-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--warn);
  flex-shrink: 0;
  box-shadow: 0 0 8px var(--warn);
}

.alert-content { flex: 1; }

.alert-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--fg);
}

.alert-meta {
  font-size: 0.75rem;
  color: var(--fg-muted);
  margin-top: 2px;
}

.alert-badge {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--bg);
  background: var(--accent);
  padding: 4px 8px;
  border-radius: 4px;
  text-transform: uppercase;
}

/* SHARED SECTION STYLES */
.section-eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.section-title {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: clamp(1.8rem, 3vw, 2.8rem);
  line-height: 1.1;
  color: var(--fg);
  margin-bottom: 56px;
}

/* HOW IT WORKS */
.howitworks {
  padding: 80px 60px;
  border-top: 1px solid var(--border);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
}

.step-number {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 800;
  font-size: 2.5rem;
  color: var(--accent);
  opacity: 0.4;
  margin-bottom: 16px;
}

.step-title {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: 1.4rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--fg);
  margin-bottom: 10px;
}

.step-desc {
  font-size: 0.875rem;
  color: var(--fg-muted);
  line-height: 1.65;
}

/* FEATURES */
.features {
  padding: 80px 60px;
  background: var(--surface);
  border-top: 1px solid var(--border);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
}

.feature-card {
  padding: 36px 32px;
  background: var(--surface-raised);
  border: 1px solid var(--border);
}

.feature-icon {
  width: 44px;
  height: 44px;
  background: var(--accent-dim);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-title {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: 1.2rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--fg);
  margin-bottom: 10px;
}

.feature-desc {
  font-size: 0.85rem;
  color: var(--fg-muted);
  line-height: 1.65;
}

/* DIAGNOSTICS */
.diagnostics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  padding: 80px 60px;
  border-top: 1px solid var(--border);
  align-items: start;
}

.diag-body {
  font-size: 0.95rem;
  color: var(--fg-muted);
  line-height: 1.7;
  margin-top: 20px;
}

.param-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.param-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  background: var(--surface);
  border: 1px solid var(--border);
}

.param-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.param-ok .param-dot { background: var(--ok); }
.param-warn .param-dot { background: var(--warn); box-shadow: 0 0 6px var(--warn); }

.param-name {
  flex: 1;
  font-size: 0.85rem;
  color: var(--fg-muted);
}

.param-value {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--fg);
}

.warn-tag {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--warn);
  text-transform: uppercase;
  margin-left: 8px;
}

/* CLOSING */
.closing {
  padding: 100px 60px;
  text-align: center;
  border-top: 1px solid var(--border);
}

.closing-statement {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 800;
  font-size: clamp(1.8rem, 3.5vw, 3rem);
  line-height: 1.15;
  color: var(--fg);
  margin-bottom: 20px;
}

.closing-sub {
  font-size: 1rem;
  color: var(--fg-muted);
  max-width: 480px;
  margin: 0 auto;
  line-height: 1.7;
}

/* FOOTER */
.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px 60px;
  border-top: 1px solid var(--border);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg);
}

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

/* RESPONSIVE */
@media (max-width: 900px) {
  .nav { padding: 20px 24px; }
  .hero { grid-template-columns: 1fr; padding: 60px 24px 80px; }
  .hero-right { display: none; }
  .steps-grid { grid-template-columns: 1fr 1fr; }
  .features-grid { grid-template-columns: 1fr 1fr; }
  .diagnostics { grid-template-columns: 1fr; padding: 60px 24px; gap: 40px; }
  .howitworks, .features, .closing { padding: 60px 24px; }
  .footer { padding: 20px 24px; flex-direction: column; gap: 8px; }
}

@media (max-width: 600px) {
  .steps-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .hero-stats { flex-direction: column; align-items: flex-start; gap: 16px; }
  .stat-divider { display: none; }
}