:root {
  --bg: #07111f;
  --surface: rgba(9, 20, 37, 0.78);
  --surface-strong: #0e1b30;
  --card: rgba(16, 29, 52, 0.88);
  --text: #e8eefb;
  --muted: #a8b6d3;
  --border: rgba(159, 181, 228, 0.16);
  --primary: #69b1ff;
  --secondary: #8b7cff;
  --accent: #33d2a0;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.28);
}

body.light {
  --bg: #f4f7fb;
  --surface: rgba(255, 255, 255, 0.92);
  --surface-strong: #ffffff;
  --card: #ffffff;
  --text: #122033;
  --muted: #5b6a84;
  --border: rgba(18, 32, 51, 0.08);
  --primary: #246bff;
  --secondary: #6c52ff;
  --accent: #0db27c;
  --shadow: 0 20px 60px rgba(48, 71, 114, 0.12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: 'Inter', system-ui, sans-serif;
  background:
    radial-gradient(circle at top left, rgba(105, 177, 255, 0.18), transparent 30%),
    radial-gradient(circle at top right, rgba(139, 124, 255, 0.16), transparent 30%),
    var(--bg);
  color: var(--text);
}

a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; }

.hero-shell {
  padding: 24px clamp(20px, 4vw, 48px) 40px;
}

.nav, .hero, .section, .footer {
  width: min(1180px, 100%);
  margin: 0 auto;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
}

.nav-links {
  display: flex;
  gap: 24px;
  color: var(--muted);
}

.nav-cta,
.button {
  border-radius: 999px;
  padding: 12px 18px;
  font-weight: 700;
  border: 1px solid transparent;
}

.nav-cta,
.button.primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
}

.button.secondary {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}

.hero {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 32px;
  align-items: center;
  padding-top: 52px;
}

.eyebrow {
  color: var(--accent);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
}

.hero h1, .section-heading h2 {
  margin: 0;
  line-height: 1.05;
}

.hero h1 {
  font-size: clamp(2.8rem, 6vw, 5rem);
  max-width: 12ch;
}

.hero-text, .section-heading p, .detail-card p, .feature-card p, .persona-card li, .price-card li, .cta-section p {
  color: var(--muted);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin: 28px 0;
}

.hero-stats {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.hero-stats li,
.feature-card,
.detail-card,
.persona-card,
.price-card,
.api-table-wrap,
.cta-section,
.trust-bar,
.panel-window {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.hero-stats li {
  padding: 18px;
}

.hero-stats strong {
  display: block;
  font-size: 1.5rem;
}

.hero-panel { position: relative; }
.panel-window { padding: 18px; }
.window-top {
  display: flex;
  gap: 8px;
  margin-bottom: 18px;
}
.window-top span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,0.35);
}
.workspace {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 16px;
}
.workspace-sidebar, .workspace-main { background: var(--card); border-radius: 20px; padding: 18px; }
.workspace-sidebar p { margin-top: 0; color: var(--muted); }
.sidebar-item {
  width: 100%;
  text-align: left;
  border: 1px solid transparent;
  border-radius: 14px;
  padding: 12px;
  background: transparent;
  color: var(--text);
  margin-top: 8px;
}
.sidebar-item.active { background: rgba(105, 177, 255, 0.14); border-color: rgba(105, 177, 255, 0.32); }
.note-card {
  border-radius: 20px;
  background: linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0.02));
  padding: 18px;
  border: 1px solid var(--border);
}
.note-card.large { min-height: 220px; }
.chip {
  display: inline-block;
  font-size: 0.8rem;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(51, 210, 160, 0.12);
  color: #7be8c4;
}
.note-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-top: 12px; }
.accent-a { background: linear-gradient(135deg, rgba(105, 177, 255, 0.25), rgba(105, 177, 255, 0.08)); }
.accent-b { background: linear-gradient(135deg, rgba(139, 124, 255, 0.25), rgba(139, 124, 255, 0.08)); }
.avatars { display: flex; gap: 8px; margin-top: 18px; }
.avatars span {
  width: 34px; height: 34px; display: inline-grid; place-items: center; border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary)); color: white; font-size: 0.78rem; font-weight: 700;
}

.section {
  padding: 42px clamp(20px, 4vw, 48px);
}

.trust-bar {
  display: grid;
  gap: 16px;
  text-align: center;
}
.logo-row {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 12px;
}
.logo-row span {
  padding: 10px 14px; border-radius: 999px; background: var(--card); border: 1px solid var(--border); color: var(--muted);
}

.section-heading {
  max-width: 800px;
  margin-bottom: 28px;
}
.section-heading.narrow { max-width: 680px; }
.section-heading h2 { font-size: clamp(2rem, 4vw, 3.5rem); }

.feature-grid,
.architecture-details,
.persona-grid,
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.feature-card, .detail-card, .persona-card, .price-card { padding: 24px; }
.architecture-flow {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}
.arch-node, .arch-arrow {
  padding: 18px 22px;
  border-radius: 18px;
}
.arch-node {
  background: var(--surface);
  border: 1px solid var(--border);
  font-weight: 700;
}
.arch-node.stack {
  display: grid;
  gap: 8px;
}
.arch-arrow { color: var(--muted); font-size: 1.5rem; }
.persona-card ul, .price-card ul { margin: 0; padding-left: 18px; }
.price-card.featured {
  background: linear-gradient(180deg, rgba(105, 177, 255, 0.18), rgba(139, 124, 255, 0.16));
  transform: translateY(-8px);
}
.price-tier { color: var(--accent); font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; }
.price-card h3 { font-size: 2rem; margin: 8px 0 18px; }
.price-card h3 span { font-size: 1rem; color: var(--muted); }

.api-table-wrap { overflow: auto; }
.api-table { width: 100%; border-collapse: collapse; min-width: 600px; }
.api-table th, .api-table td { padding: 18px 20px; text-align: left; border-bottom: 1px solid var(--border); }
.api-table th { color: var(--muted); font-size: 0.92rem; text-transform: uppercase; letter-spacing: 0.04em; }

.cta-section {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 24px;
  padding: 28px;
}
.waitlist-form {
  display: grid;
  gap: 14px;
}
.waitlist-form label {
  display: grid;
  gap: 8px;
  color: var(--muted);
}
.waitlist-form input,
.waitlist-form select {
  border-radius: 16px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  padding: 14px 16px;
}
.full { width: 100%; }

.footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding: 0 20px 40px;
  color: var(--muted);
}
.theme-toggle {
  padding: 12px 16px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text);
  background: var(--surface);
}

@media (max-width: 960px) {
  .hero,
  .cta-section,
  .feature-grid,
  .architecture-details,
  .persona-grid,
  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .nav {
    flex-wrap: wrap;
    justify-content: center;
  }

  .nav-links {
    order: 3;
    width: 100%;
    justify-content: center;
  }

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

@media (max-width: 640px) {
  .hero-shell { padding-inline: 16px; }
  .hero h1 { max-width: none; }
  .hero-actions, .hero-stats { grid-template-columns: 1fr; flex-direction: column; }
  .note-grid { grid-template-columns: 1fr; }
  .footer { flex-direction: column; text-align: center; }
}