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

:root {
  --bg: #0a0a0a;
  --bg-card: #111;
  --bg-code: #161616;
  --text: #e0e0e0;
  --text-dim: #888;
  --accent: #4ade80;
  --accent-dim: #22763a;
  --border: #222;
  --mono: "SF Mono", "Fira Code", "JetBrains Mono", Menlo, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* Layout */
.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Hero */
.hero {
  padding: 96px 0 64px;
  text-align: center;
}

.hero .logo {
  margin-bottom: 20px;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.hero h1 .accent {
  color: var(--accent);
}

.hero .subtitle {
  font-size: 1.15rem;
  color: var(--text-dim);
  max-width: 520px;
  margin: 0 auto 32px;
}

/* CTA buttons */
.cta {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.cta a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  transition: opacity 0.15s;
}

.cta a:hover {
  opacity: 0.85;
}

.cta .primary {
  background: var(--accent);
  color: #0a0a0a;
  font-family: var(--mono);
  font-weight: 600;
}

.cta .secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

/* Section */
section {
  padding: 56px 0;
  border-top: 1px solid var(--border);
}

section h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 24px;
  letter-spacing: -0.01em;
}

/* Problem bullets */
.problems {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.problems li {
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  line-height: 1.6;
}

.problems li strong {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.85rem;
}

/* Code block */
.code-block {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px 24px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.8;
  margin: 16px 0;
  white-space: pre;
}

.code-block .comment { color: #555; }
.code-block .keyword { color: #c084fc; }
.code-block .string { color: #4ade80; }
.code-block .func { color: #60a5fa; }
.code-block .decorator { color: #fb923c; }
.code-block .builtin { color: #f472b6; }

/* Proof points */
.proof-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.proof-grid .item {
  padding: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  text-align: center;
}

.proof-grid .item .number {
  font-family: var(--mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  display: block;
  margin-bottom: 4px;
}

.proof-grid .item .label {
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* Compliance */
.compliance-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 16px;
}

.compliance-list li {
  padding-left: 20px;
  position: relative;
  color: var(--text-dim);
  line-height: 1.6;
}

.compliance-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
}

.compliance-list li strong {
  color: var(--text);
}

/* Footer */
footer {
  padding: 48px 0;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-dim);
  font-size: 0.85rem;
}

footer a {
  color: var(--accent);
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

footer .links {
  display: flex;
  gap: 24px;
  justify-content: center;
  margin-bottom: 12px;
}

/* Responsive */
@media (max-width: 600px) {
  .hero {
    padding: 64px 0 48px;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .hero .subtitle {
    font-size: 1rem;
  }

  .cta {
    flex-direction: column;
    align-items: center;
  }

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