:root {
  --bg: #0b0b0f;
  --bg-elev: #14141d;
  --bg-elev-2: #1d1d2a;
  --border: #2a2a38;
  --fg: #ececf2;
  --fg-muted: #9a9aaa;
  --accent: #7c5cff;
  --accent-soft: rgba(124, 92, 255, 0.16);
  --success: #2bb673;
  --danger: #e0556e;
  --radius: 10px;
  --max: 980px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.55;
}

a {
  color: var(--fg);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
a:hover {
  border-bottom-color: var(--fg-muted);
}

code {
  background: var(--bg-elev-2);
  padding: 1px 6px;
  border-radius: 6px;
  font-size: 0.9em;
  border: 1px solid var(--border);
}

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 11, 15, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  gap: 18px;
  align-items: center;
}

.brand {
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
}

.nav-links,
.nav-links [data-nav-auth] {
  display: flex;
  gap: 18px;
  align-items: center;
}

.nav-links {
  margin-left: auto;
  align-items: center;
  font-size: 14px;
  color: var(--fg-muted);
}

.nav-links a {
  color: var(--fg-muted);
  border-bottom: none;
}
.nav-links a:hover {
  color: var(--fg);
}

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 56px 20px 96px;
}

h1 {
  font-size: 44px;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin: 0 0 16px;
}

h2 {
  font-size: 26px;
  letter-spacing: -0.02em;
  margin: 36px 0 14px;
}

h3 {
  font-size: 17px;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}

p {
  margin: 0 0 14px;
}

.lead {
  color: var(--fg-muted);
  font-size: 18px;
  max-width: 60ch;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--fg);
  font: inherit;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
}

.btn:hover {
  border-color: var(--fg-muted);
}

.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn.primary:hover {
  filter: brightness(1.08);
}

.btn[disabled] {
  opacity: 0.6;
  cursor: not-allowed;
}

.cta-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 24px 0 8px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin: 28px 0;
}

.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.card.padded {
  padding: 28px;
}

.muted {
  color: var(--fg-muted);
  font-size: 14px;
}

.kv {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 8px 16px;
  font-size: 14px;
}

.kv dt {
  color: var(--fg-muted);
}

.kv dd {
  margin: 0;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin: 28px 0;
}

.tier {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
}

.tier.featured {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

.tier .price {
  font-size: 32px;
  letter-spacing: -0.02em;
  font-weight: 700;
  margin: 6px 0 4px;
}

.tier ul {
  padding-left: 18px;
  margin: 12px 0 18px;
  color: var(--fg-muted);
  font-size: 14px;
}

.tier li {
  margin: 4px 0;
}

.tier .btn {
  margin-top: auto;
}

.banner {
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  color: var(--fg);
  border-radius: var(--radius);
  padding: 14px 18px;
  font-size: 14px;
  margin: 0 0 24px;
}

.error {
  background: rgba(224, 85, 110, 0.12);
  border: 1px solid var(--danger);
  color: var(--fg);
  border-radius: var(--radius);
  padding: 12px 16px;
  font-size: 14px;
  margin: 16px 0;
}

.footer {
  border-top: 1px solid var(--border);
  margin-top: 64px;
  padding: 22px 20px;
  color: var(--fg-muted);
  font-size: 13px;
  text-align: center;
}

.spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid var(--fg-muted);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-right: 6px;
  vertical-align: -2px;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.hidden {
  display: none !important;
}

.tier-badge {
  display: inline-block;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid var(--accent);
}

@media (max-width: 600px) {
  h1 {
    font-size: 32px;
  }
  main {
    padding: 32px 16px 64px;
  }
  .nav-inner {
    padding: 12px 16px;
  }
  .nav-links,
  .nav-links [data-nav-auth] {
    gap: 12px;
  }
}