:root {
  --bg: #f7f6f2;
  --surface: #ffffff;
  --surface-dim: #fafaf7;
  --border: #e0ded7;
  --border-light: #eeedea;
  --text: #1a1a18;
  --text-secondary: #4a4a46;
  --text-tertiary: #88877f;
  --accent: #b5312a;
  --blue: #2c5f8a;
  --serif: 'Source Serif 4', Georgia, serif;
  --sans: 'DM Sans', -apple-system, sans-serif;
  --radius: 6px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 14px rgba(0,0,0,0.07);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}

/* Scroll reveal */
@keyframes reveal {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}
.reveal { animation: reveal 0.5s ease-out both; }

/* Nav */
nav {
  border-bottom: 1px solid var(--border);
  background: rgba(247, 246, 242, 0.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 0 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 52px;
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav-brand { font-weight: 700; font-size: 15px; letter-spacing: -0.01em; text-decoration: none; color: var(--text); }
.nav-brand span { color: var(--text-tertiary); font-weight: 400; }
.nav-links { display: flex; gap: 24px; }
.nav-links a {
  font-size: 12.5px;
  font-weight: 500;
  color: var(--text-tertiary);
  text-decoration: none;
  transition: color 0.15s;
}
.nav-links a:hover { color: var(--text); }

/* Hero */
.hero { max-width: 820px; margin: 0 auto; padding: 64px 40px 48px; }
.hero-inner { max-width: 820px; margin: 0 auto; }
.hero-label {
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 18px;
}
.hero h1 {
  font-family: var(--serif);
  font-size: 38px;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.025em;
  margin-bottom: 20px;
  max-width: 640px;
}
.hero-intro {
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-secondary);
  max-width: 580px;
}
.hero-date {
  margin-top: 24px;
  font-size: 12px;
  color: var(--text-tertiary);
  font-weight: 500;
}

/* Sections */
.section { max-width: 820px; margin: 0 auto; padding: 0 40px 56px; }
.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 8px;
  border-bottom: 1.5px solid var(--text);
}
.section-header h2 {
  font-family: var(--serif);
  font-size: 21px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.section-header .tag {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-tertiary);
}

/* Context blocks */
.context-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 30px;
  margin-bottom: 10px;
  box-shadow: var(--shadow-sm);
}
.context-block:last-child { margin-bottom: 0; }
.context-block h3 {
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 10px;
}
.context-block p {
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text-secondary);
  margin-bottom: 10px;
}
.context-block p:last-child { margin-bottom: 0; }

/* Action cards */
.action-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.action-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  text-decoration: none;
  color: var(--text);
  box-shadow: var(--shadow-sm);
  transition: all 0.2s ease;
}
.action-card:hover {
  border-color: var(--blue);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.action-icon { font-size: 20px; margin-bottom: 12px; }
.action-card h4 { font-size: 13.5px; font-weight: 600; margin-bottom: 6px; }
.action-card p { font-size: 12.5px; color: var(--text-tertiary); line-height: 1.55; }

/* Footer */
footer {
  max-width: 820px;
  margin: 0 auto;
  padding: 24px 40px 40px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-tertiary);
  line-height: 1.7;
}

/* Responsive */
@media (max-width: 700px) {
  nav { padding: 0 20px; }
  .hero { padding: 44px 20px 36px; }
  .hero h1 { font-size: 28px; }
  .section { padding-left: 20px; padding-right: 20px; }
  .action-cards { grid-template-columns: 1fr; }
  footer { flex-direction: column; gap: 10px; padding: 20px 20px 32px; }
  .nav-links { gap: 14px; }
  .nav-links a { font-size: 11px; }
}