:root {
  --bg: #0a0e14;
  --bg-elevated: #111820;
  --bg-card: #151d28;
  --border: #243044;
  --text: #e8edf4;
  --text-muted: #8b9cb3;
  --accent: #3b9eff;
  --accent-dim: #2563a8;
  --accent-glow: rgba(59, 158, 255, 0.25);
  --success: #34d399;
  --warn: #fbbf24;
  --font: "DM Sans", system-ui, -apple-system, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --radius: 12px;
  --max: 1120px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, var(--accent-glow), transparent),
    radial-gradient(ellipse 60% 40% at 100% 0%, rgba(52, 211, 153, 0.06), transparent);
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
  height: auto;
}

.container {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border);
  background: rgba(10, 14, 20, 0.85);
  backdrop-filter: blur(12px);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  gap: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text);
  text-decoration: none;
}

.logo:hover {
  text-decoration: none;
}

.logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), #1e6fd9);
  display: grid;
  place-items: center;
  font-size: 1.1rem;
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav a {
  color: var(--text-muted);
  font-size: 0.9375rem;
  font-weight: 500;
  text-decoration: none;
}

.nav a:hover {
  color: var(--text);
  text-decoration: none;
}

.nav-cta {
  background: var(--accent);
  color: #fff !important;
  padding: 0.5rem 1.1rem;
  border-radius: 8px;
  font-weight: 600;
}

.nav-cta:hover {
  background: #2d8ae6;
  text-decoration: none;
}

.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.4rem 0.65rem;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1.25rem;
}

/* Hero */
.hero {
  padding: 4.5rem 0 5rem;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(59, 158, 255, 0.12);
  border: 1px solid rgba(59, 158, 255, 0.3);
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-size: clamp(2.25rem, 5vw, 3.25rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 1.25rem;
  max-width: 18ch;
  margin-inline: auto;
}

.hero-lead {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 42rem;
  margin: 0 auto 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 3rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.5rem;
  border-radius: 10px;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 24px var(--accent-glow);
}

.btn-primary:hover {
  background: #2d8ae6;
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--accent-dim);
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  max-width: 36rem;
  margin-inline: auto;
}

.stat strong {
  display: block;
  font-size: 1.5rem;
  color: var(--text);
}

.stat span {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Sections */
section {
  padding: 4rem 0;
}

.section-label {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

section h2 {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
}

.section-intro {
  color: var(--text-muted);
  max-width: 40rem;
  margin-bottom: 2.5rem;
}

/* Cards grid */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.125rem;
}

.card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.card-icon {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
}

/* How it works */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  counter-reset: step;
}

.step {
  position: relative;
  padding-left: 3rem;
}

.step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 2rem;
  height: 2rem;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  font-size: 0.875rem;
  display: grid;
  place-items: center;
  font-family: var(--mono);
}

.step h3 {
  margin: 0 0 0.35rem;
  font-size: 1.0625rem;
}

.step p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9375rem;
}

/* Pricing */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  align-items: stretch;
}

.price-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
}

.price-card.featured {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent-dim), 0 12px 40px var(--accent-glow);
}

.price-card h3 {
  margin: 0 0 0.25rem;
  font-size: 1.25rem;
}

.price-card .tagline {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-bottom: 1.25rem;
}

.price {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.25rem;
}

.price span {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-muted);
}

.price-equiv {
  margin: 0.75rem 0 0.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.price-features {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0;
  flex: 1;
}

.price-features li {
  padding: 0.4rem 0;
  padding-left: 1.5rem;
  position: relative;
  font-size: 0.9375rem;
  color: var(--text-muted);
}

.price-features li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--success);
  font-weight: 700;
}

.price-card .btn {
  width: 100%;
  justify-content: center;
  margin-top: auto;
}

/* Download */
.download-box {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: center;
}

.download-box h3 {
  margin: 0 0 0.5rem;
}

.download-meta {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-family: var(--mono);
}

.req-list {
  margin-top: 1.5rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.req-list dt {
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: 0.2rem;
}

.req-list dd {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.badge-beta {
  display: inline-block;
  background: rgba(251, 191, 36, 0.15);
  color: var(--warn);
  border: 1px solid rgba(251, 191, 36, 0.35);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
  margin-left: 0.5rem;
  vertical-align: middle;
}

/* FAQ */
.faq-list {
  max-width: 40rem;
}

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-item summary {
  padding: 1.1rem 0;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  float: right;
  color: var(--accent);
  font-weight: 400;
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item p {
  margin: 0 0 1.1rem;
  color: var(--text-muted);
  font-size: 0.9375rem;
}

/* Tier table */
.tier-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

.tier-table th,
.tier-table td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.tier-table th {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.tier-excellent { color: var(--success); }
.tier-good { color: var(--accent); }
.tier-degraded { color: var(--warn); }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
  margin-top: 2rem;
}

.footer-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 2rem;
}

.site-footer p {
  margin: 0.25rem 0 0;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.alt-bg {
  background: var(--bg-elevated);
}

@media (max-width: 768px) {
  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 1rem;
    align-items: stretch;
  }

  .nav.open {
    display: flex;
  }

  .menu-toggle {
    display: block;
  }

  .download-box {
    grid-template-columns: 1fr;
  }
}