:root {
  --bg: #0a0e17;
  --bg-alt: #0f1520;
  --fg: #e8edf5;
  --fg-muted: #6b7a90;
  --cyan: #00e5ff;
  --cyan-dim: rgba(0, 229, 255, 0.08);
  --green: #00ff88;
  --amber: #ffb800;
  --red: #ff4455;
  --border: rgba(255,255,255,0.07);
  --mono: 'IBM Plex Mono', monospace;
  --sans: 'IBM Plex Sans', sans-serif;
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Navigation */
.nav {
  padding: 20px 40px;
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  gap: 16px;
  max-width: 1100px;
  margin: 0 auto;
}
.nav-brand {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.5px;
  color: var(--fg);
}
.nav-badge {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  color: var(--cyan);
  background: var(--cyan-dim);
  border: 1px solid rgba(0, 229, 255, 0.2);
  padding: 3px 10px;
  border-radius: 3px;
  letter-spacing: 0.5px;
}

/* Hero */
.hero {
  max-width: 1100px;
  margin: 0 auto;
  padding: 64px 40px 80px;
}

.stats-row {
  display: flex;
  align-items: center;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 56px;
  background: var(--bg-alt);
}
.stat {
  flex: 1;
  padding: 24px 32px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.stat-divider {
  width: 1px;
  background: var(--border);
  align-self: stretch;
}
.stat-num {
  font-family: var(--mono);
  font-size: 32px;
  font-weight: 700;
  color: var(--cyan);
  line-height: 1;
}
.stat-label {
  font-size: 13px;
  color: var(--fg-muted);
  letter-spacing: 0.3px;
}

.hero-content {
  max-width: 720px;
}
.hero-title {
  font-family: var(--mono);
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -1.5px;
  color: var(--fg);
  margin-bottom: 20px;
}
.hero-lede {
  font-size: 18px;
  color: var(--fg-muted);
  line-height: 1.6;
  max-width: 560px;
}

/* Threats */
.threats {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 80px 40px;
}
.threats-inner {
  max-width: 1100px;
  margin: 0 auto;
}
.threat-header {
  margin-bottom: 48px;
}
.threat-heading {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--fg-muted);
}
.threat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.threat-card {
  background: var(--bg-alt);
  padding: 36px 40px;
}
.threat-icon {
  font-family: var(--mono);
  font-size: 20px;
  color: var(--cyan);
  margin-bottom: 14px;
  font-weight: 700;
}
.threat-title {
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 10px;
}
.threat-desc {
  font-size: 14px;
  color: var(--fg-muted);
  line-height: 1.6;
}

/* How it works */
.how-it-works {
  padding: 80px 40px;
  max-width: 1100px;
  margin: 0 auto;
}
.how-header { margin-bottom: 48px; }
.how-heading {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--fg-muted);
}
.steps {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.step {
  display: flex;
  gap: 40px;
  padding: 36px 0;
  border-bottom: 1px solid var(--border);
  align-items: flex-start;
}
.step:last-child { border-bottom: none; }
.step-num {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--cyan);
  background: var(--cyan-dim);
  border: 1px solid rgba(0, 229, 255, 0.15);
  padding: 4px 10px;
  border-radius: 3px;
  letter-spacing: 1px;
  flex-shrink: 0;
  margin-top: 4px;
}
.step-title {
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 8px;
}
.step-desc {
  font-size: 14px;
  color: var(--fg-muted);
  line-height: 1.65;
}

/* Scoring */
.scoring {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 80px 40px;
}
.scoring-inner {
  max-width: 1100px;
  margin: 0 auto;
}
.scoring-header { margin-bottom: 48px; }
.scoring-heading {
  font-family: var(--mono);
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 8px;
}
.scoring-sub {
  font-size: 15px;
  color: var(--fg-muted);
}
.grades {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
}
.grade {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 28px 20px;
  text-align: center;
}
.grade-label {
  font-family: var(--mono);
  font-size: 36px;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 10px;
}
.grade-a .grade-label { color: var(--green); }
.grade-b .grade-label { color: #80ff80; }
.grade-c .grade-label { color: var(--amber); }
.grade-d .grade-label { color: #ff8844; }
.grade-f .grade-label { color: var(--red); }
.grade-desc {
  font-size: 12px;
  color: var(--fg-muted);
  line-height: 1.4;
}

/* Closing */
.closing {
  padding: 96px 40px;
  max-width: 1100px;
  margin: 0 auto;
}
.closing-inner { max-width: 680px; }
.closing-badge {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--cyan);
  background: var(--cyan-dim);
  border: 1px solid rgba(0, 229, 255, 0.15);
  display: inline-block;
  padding: 5px 14px;
  border-radius: 20px;
  margin-bottom: 24px;
  letter-spacing: 0.5px;
}
.closing-headline {
  font-family: var(--mono);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  letter-spacing: -1px;
  color: var(--fg);
  margin-bottom: 20px;
  line-height: 1.2;
}
.closing-body {
  font-size: 16px;
  color: var(--fg-muted);
  line-height: 1.7;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 48px 40px;
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 32px;
}
.footer-brand { display: flex; flex-direction: column; gap: 4px; }
.footer-name {
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--fg);
}
.footer-tagline {
  font-size: 13px;
  color: var(--fg-muted);
}
.footer-links {
  display: flex;
  gap: 24px;
}
.footer-links a {
  font-size: 13px;
  color: var(--fg-muted);
  text-decoration: none;
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--cyan); }

/* Responsive */
@media (max-width: 768px) {
  .hero, .how-it-works, .closing { padding: 48px 20px; }
  .threats { padding: 60px 20px; }
  .scoring { padding: 60px 20px; }
  .nav { padding: 16px 20px; }
  .footer { padding: 40px 20px; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
  .footer-links { flex-wrap: wrap; gap: 16px; }

  .stats-row { flex-direction: column; }
  .stat-divider { width: 100%; height: 1px; }

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

  .step { flex-direction: column; gap: 12px; }

  .stat { padding: 20px 24px; }
}

@media (max-width: 480px) {
  .grades { grid-template-columns: 1fr 1fr; }
}