.proof-page {
  min-height: 100vh;
  background: var(--bg-primary);
  color: var(--text-primary);
}

.page-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--nav-bg);
  border-bottom: 1px solid var(--card-border);
  backdrop-filter: blur(18px);
}

.page-nav-inner {
  max-width: 1040px;
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.page-nav-brand {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  color: var(--text-primary);
  text-decoration: none;
}

.page-nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 0.88rem;
}

.page-nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
}

.page-nav-links a:hover {
  color: var(--accent);
}

.page-shell {
  max-width: 1040px;
  margin: 0 auto;
  padding: 86px 24px 72px;
}

.page-kicker {
  display: inline-flex;
  margin-bottom: 18px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.76rem;
  letter-spacing: 0;
  color: var(--accent);
  text-transform: uppercase;
}

.page-title {
  max-width: 820px;
  margin: 0;
  font-family: 'Syne', sans-serif;
  font-size: clamp(2.25rem, 7vw, 4.75rem);
  line-height: 0.98;
  letter-spacing: 0;
}

.page-lede {
  max-width: 760px;
  margin: 24px 0 0;
  color: var(--text-secondary);
  font-size: 1.08rem;
  line-height: 1.75;
}

.page-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.proof-band {
  border-top: 1px solid var(--card-border);
  padding: 52px 0;
}

.proof-band:first-of-type {
  margin-top: 54px;
}

.proof-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.proof-grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.proof-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 22px;
}

.proof-card h2,
.proof-card h3 {
  margin: 0 0 12px;
  font-family: 'Syne', sans-serif;
  font-size: 1.16rem;
}

.proof-card p,
.proof-card li {
  color: var(--text-secondary);
  line-height: 1.68;
  font-size: 0.96rem;
}

.proof-card ul {
  margin: 0;
  padding-left: 18px;
}

.proof-metric {
  display: block;
  margin-bottom: 6px;
  font-family: 'JetBrains Mono', monospace;
  color: var(--accent);
  font-size: 0.78rem;
}

.proof-list {
  display: grid;
  gap: 14px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.proof-list li {
  padding: 16px 18px;
  background: var(--bg-secondary);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  color: var(--text-secondary);
}

.proof-note {
  margin-top: 28px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.page-footer {
  border-top: 1px solid var(--card-border);
  color: var(--text-muted);
  padding: 30px 24px;
  text-align: center;
}

@media (max-width: 820px) {
  .page-nav-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .page-shell {
    padding-top: 54px;
  }

  .proof-grid,
  .proof-grid.two {
    grid-template-columns: 1fr;
  }

  .page-actions .btn {
    width: auto;
    max-width: none;
  }
}