:root {
  --bg: #faf9f6;
  --surface: #ffffff;
  --fg: #1a1a2e;
  --fg-secondary: #5c5c6e;
  --accent: #e8b931;
  --accent-dark: #c9961a;
  --grade-a: #2d7a4f;
  --grade-b: #4a7eb5;
  --grade-c: #c9921a;
  --grade-d: #c9531a;
  --grade-f: #9b1c1c;
  --border: #e2e0d8;
  --serif: 'Playfair Display', Georgia, serif;
  --sans: 'DM Sans', system-ui, sans-serif;
}

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

html { font-size: 16px; }

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

/* Navbar */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 48px;
  border-bottom: 1px solid var(--border);
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--fg);
  color: var(--accent);
  font-family: var(--serif);
  font-weight: 900;
  font-size: 18px;
  border-radius: 6px;
}

.brand-name {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 18px;
  color: var(--fg);
  letter-spacing: -0.02em;
}

.navbar-tagline {
  font-size: 12px;
  font-weight: 500;
  color: var(--fg-secondary);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* Hero */
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  padding: 80px 48px 72px;
  max-width: 1200px;
  margin: 0 auto;
}

.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-secondary);
  margin-bottom: 20px;
}

.eyebrow-dot {
  width: 8px;
  height: 8px;
  background: var(--grade-a);
  border-radius: 50%;
}

.hero-headline {
  font-family: var(--serif);
  font-size: clamp(36px, 4vw, 54px);
  font-weight: 900;
  line-height: 1.1;
  color: var(--fg);
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.hero-sub {
  font-size: 17px;
  color: var(--fg-secondary);
  line-height: 1.7;
  max-width: 480px;
}

/* Grade block */
.hero-grade-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 36px;
  box-shadow: 0 2px 20px rgba(0,0,0,0.05);
}

.grade-display {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-bottom: 20px;
}

.grade-letter {
  font-family: var(--serif);
  font-size: 96px;
  font-weight: 900;
  color: var(--grade-b);
  line-height: 1;
}

.grade-meta {
  padding-top: 8px;
}

.grade-trade {
  font-size: 14px;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 4px;
}

.grade-compare {
  font-size: 13px;
  color: var(--fg-secondary);
}

.grade-footer-note {
  font-size: 11px;
  color: var(--fg-secondary);
  border-top: 1px solid var(--border);
  padding-top: 16px;
  letter-spacing: 0.02em;
}

/* Proof */
.proof {
  padding: 56px 48px;
  background: var(--fg);
  color: white;
}

.proof-stat-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  max-width: 960px;
  margin: 0 auto 40px;
}

.proof-stat {
  text-align: center;
}

.stat-number {
  font-family: var(--serif);
  font-size: 40px;
  font-weight: 900;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 12px;
  font-weight: 500;
  color: rgba(255,255,255,0.6);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.proof-divider {
  width: 1px;
  height: 40px;
  background: rgba(255,255,255,0.15);
}

.proof-capture {
  text-align: center;
  font-size: 20px;
  color: rgba(255,255,255,0.85);
  max-width: 560px;
  margin: 0 auto;
  font-style: italic;
  font-family: var(--serif);
}

/* How it works */
.how {
  padding: 80px 48px;
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  font-family: var(--serif);
  font-size: 32px;
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 48px;
  letter-spacing: -0.02em;
}

.how-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.how-step {
  padding: 28px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.step-num {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--accent-dark);
  margin-bottom: 16px;
}

.step-title {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 10px;
}

.step-desc {
  font-size: 14px;
  color: var(--fg-secondary);
  line-height: 1.6;
}

/* Grade scale */
.grade-section {
  padding: 80px 48px;
  background: var(--fg);
  color: white;
}

.grade-section .section-title {
  color: white;
}

.grade-scale {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 720px;
  margin-bottom: 32px;
}

.grade-item {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 18px 24px;
  border-radius: 10px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
}

.grade-glyph {
  font-family: var(--serif);
  font-size: 36px;
  font-weight: 900;
  width: 52px;
  text-align: center;
  line-height: 1;
}

.grade-a .grade-glyph { color: #4ade80; }
.grade-b .grade-glyph { color: #60a5fa; }
.grade-c .grade-glyph { color: var(--accent); }
.grade-d .grade-glyph { color: #f87171; }
.grade-f .grade-glyph { color: #f87171; }

.grade-desc {
  font-size: 14px;
  color: rgba(255,255,255,0.75);
}

.grade-note {
  font-size: 12px;
  color: rgba(255,255,255,0.4);
  max-width: 600px;
}

/* Closing */
.closing {
  padding: 96px 48px;
  text-align: center;
}

.closing-inner {
  max-width: 720px;
  margin: 0 auto;
}

.closing-headline {
  font-family: var(--serif);
  font-size: clamp(28px, 3.5vw, 44px);
  font-weight: 900;
  color: var(--fg);
  letter-spacing: -0.02em;
  margin-bottom: 20px;
  line-height: 1.2;
}

.closing-sub {
  font-size: 17px;
  color: var(--fg-secondary);
  line-height: 1.7;
}

/* Footer */
.footer {
  padding: 40px 48px;
  border-top: 1px solid var(--border);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.footer-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  background: var(--fg);
  color: var(--accent);
  font-family: var(--serif);
  font-weight: 900;
  font-size: 13px;
  border-radius: 4px;
}

.footer-name {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 14px;
  color: var(--fg);
}

.footer-tagline {
  font-size: 13px;
  color: var(--fg-secondary);
  margin-bottom: 12px;
}

.footer-legal {
  font-size: 11px;
  color: rgba(92,92,110,0.6);
}

/* Mobile */
@media (max-width: 768px) {
  .navbar { padding: 16px 20px; }
  .navbar-tagline { display: none; }

  .hero {
    grid-template-columns: 1fr;
    padding: 48px 20px 40px;
    gap: 40px;
  }

  .hero-headline { font-size: 34px; }
  .grade-letter { font-size: 72px; }

  .proof { padding: 40px 20px; }
  .proof-stat-row { flex-direction: column; gap: 24px; }
  .proof-divider { display: none; }

  .how { padding: 56px 20px; }
  .how-steps { grid-template-columns: 1fr; }

  .grade-section { padding: 56px 20px; }
  .grade-scale { gap: 8px; }

  .closing { padding: 64px 20px; }

  .footer { padding: 32px 20px; }
}