:root {
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --ink: #111827;
  --ink-soft: #4b5563;
  --ink-faint: #9ca3af;
  --bg: #ffffff;
  --bg-alt: #f9fafb;
  --border: #e5e7eb;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.5;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

a { color: inherit; text-decoration: none; }

/* Header */
.site-header {
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(8px);
  z-index: 10;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ink-soft);
}

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

.nav-cta { display: inline-flex; }

/* Buttons */
.btn {
  display: inline-block;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background 0.15s, border-color 0.15s;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  padding: 9px 18px;
  font-size: 0.9rem;
}
.btn-primary:hover { background: var(--accent-dark); }

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--border);
  padding: 9px 18px;
  font-size: 0.9rem;
}
.btn-ghost:hover { border-color: var(--ink-faint); }

.btn-lg { padding: 13px 26px; font-size: 1rem; }

/* Hero */
.hero {
  padding: 96px 0 80px;
  background: radial-gradient(circle at 20% 0%, #eff6ff 0%, transparent 55%);
}

.hero-inner { text-align: center; max-width: 720px; margin: 0 auto; padding: 0 24px; }

.eyebrow {
  color: var(--accent);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin: 0 0 16px;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.15;
  margin: 0 0 20px;
  letter-spacing: -0.02em;
}

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

.hero-sub {
  font-size: 1.15rem;
  color: var(--ink-soft);
  margin: 0 0 36px;
}

.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* Sections */
.section { padding: 88px 0; }
.section-alt { background: var(--bg-alt); }

.section h2 {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin: 0 0 12px;
  letter-spacing: -0.01em;
}

.section-sub {
  text-align: center;
  color: var(--ink-soft);
  max-width: 560px;
  margin: 0 auto 56px;
  font-size: 1.05rem;
}

/* Feature grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.feature-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 22px;
  background: var(--bg);
}

.feature-icon { font-size: 1.6rem; margin-bottom: 14px; }

.feature-card h3 { font-size: 1.05rem; margin: 0 0 8px; }
.feature-card p { font-size: 0.9rem; color: var(--ink-soft); margin: 0; }

/* Roadmap */
.roadmap-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.roadmap-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
  background: var(--bg);
}

.roadmap-item--active { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }

.roadmap-status {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--accent);
  background: #eff6ff;
  padding: 3px 9px;
  border-radius: 999px;
  margin-bottom: 12px;
}

.roadmap-item h3 { font-size: 1rem; margin: 0 0 6px; }
.roadmap-item p { font-size: 0.87rem; color: var(--ink-soft); margin: 0; }

/* CTA */
.cta-section { padding: 88px 0; text-align: center; }
.cta-inner h2 { font-size: 2rem; margin: 0 0 12px; }
.cta-inner p { color: var(--ink-soft); margin: 0 0 32px; font-size: 1.05rem; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--ink-faint);
}

@media (max-width: 860px) {
  .feature-grid, .roadmap-list { grid-template-columns: repeat(2, 1fr); }
  .nav-links { display: none; }
}

@media (max-width: 560px) {
  .hero h1 { font-size: 2.1rem; }
  .feature-grid, .roadmap-list { grid-template-columns: 1fr; }
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #f3f4f6;
    --ink-soft: #cbd5e1;
    --ink-faint: #6b7280;
    --bg: #0b1220;
    --bg-alt: #0f172a;
    --border: #1f2937;
  }
  .site-header { background: rgba(11, 18, 32, 0.85); }
  .hero { background: radial-gradient(circle at 20% 0%, #10203f 0%, transparent 55%); }
  .roadmap-status { background: #10203f; }
}