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

:root {
  --bg: #FAFAF8;
  --surface: #FFFFFF;
  --text: #1A1A18;
  --text-muted: #6B6B64;
  --accent: #C84B31;
  --accent-hover: #A83D27;
  --border: #E8E8E4;
  --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

body {
  font-family: -apple-system, 'Helvetica Neue', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Nav */

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 48px;
  max-width: 1200px;
  margin: 0 auto;
}

.nav-brand {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}

.nav-link:hover {
  color: var(--text);
}

.nav-cta {
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  text-decoration: none;
  padding: 8px 20px;
  border: 1px solid var(--border);
  border-radius: 6px;
  transition: border-color 0.2s;
}

.nav-cta:hover {
  border-color: var(--text);
}

/* Hero */

.hero {
  max-width: 720px;
  margin: 0 auto;
  padding: 120px 48px 100px;
  text-align: center;
}

.hero-tag {
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: 56px;
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.08;
  margin-bottom: 24px;
}

.hero-sub {
  font-size: 18px;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 540px;
  margin: 0 auto 40px;
}

/* Buttons */

.btn-primary {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  padding: 14px 36px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s;
}

.btn-primary:hover {
  background: var(--accent-hover);
}

/* Agents Section */

.agents {
  max-width: 1100px;
  margin: 0 auto;
  padding: 80px 48px;
}

.agents h2 {
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 48px;
  text-align: center;
}

.agent-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.agent-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 36px 28px;
  box-shadow: var(--card-shadow);
}

.agent-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--text);
  color: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-bottom: 20px;
}

.agent-card h3 {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
}

.agent-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 20px;
}

.agent-vibe {
  font-size: 13px;
  font-style: italic;
  color: var(--accent);
  padding-top: 16px;
  border-top: 1px solid var(--border);
  line-height: 1.6;
}

/* Difference Section */

.difference {
  max-width: 1100px;
  margin: 0 auto;
  padding: 80px 48px;
}

.difference h2 {
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 48px;
  text-align: center;
}

.diff-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.diff-item {
  padding: 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--card-shadow);
}

.diff-item h3 {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.diff-item p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.65;
}

/* Origin Story */

.origin {
  max-width: 640px;
  margin: 0 auto;
  padding: 80px 48px;
  text-align: center;
}

.origin h2 {
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.origin p {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 16px;
}

/* Policy */

.policy {
  max-width: 640px;
  margin: 0 auto;
  padding: 80px 48px;
  text-align: center;
  border-top: 1px solid var(--border);
}

.policy h2 {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.policy p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 16px;
}

.policy p:first-of-type {
  font-size: 17px;
  color: var(--text);
  font-weight: 500;
}

/* Pricing */

.pricing {
  max-width: 480px;
  margin: 0 auto;
  padding: 80px 48px;
  text-align: center;
}

.pricing h2 {
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 36px;
}

.price-card {
  background: var(--surface);
  border: 2px solid var(--text);
  border-radius: 16px;
  padding: 48px 36px;
  box-shadow: var(--card-shadow);
}

.price {
  font-size: 56px;
  font-weight: 700;
  letter-spacing: -0.04em;
  margin-bottom: 4px;
}

.price span {
  font-size: 18px;
  font-weight: 400;
  color: var(--text-muted);
}

.price-card h3 {
  font-size: 18px;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 28px;
}

.price-card ul {
  list-style: none;
  text-align: left;
  margin-bottom: 36px;
}

.price-card li {
  font-size: 14px;
  color: var(--text);
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  line-height: 1.5;
}

.price-card li:last-child {
  border-bottom: none;
}

/* Footer */

footer {
  text-align: center;
  padding: 60px 48px;
  border-top: 1px solid var(--border);
}

footer p {
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 4px;
}

.footer-sub {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 400;
}

/* Responsive */

@media (max-width: 768px) {
  .nav { padding: 16px 24px; }
  .hero { padding: 80px 24px 60px; }
  .hero h1 { font-size: 36px; }
  .hero-sub { font-size: 16px; }
  .agent-grid { grid-template-columns: 1fr; }
  .diff-grid { grid-template-columns: 1fr; }
  .agents, .difference, .origin, .pricing { padding: 60px 24px; }
}