/* ── Tokens ──────────────────────────────────────── */
:root {
  --bg: #06060b;
  --bg-alt: #0c0c14;
  --surface: #111119;
  --surface-hover: #16161f;
  --border: #1c1c2c;
  --border-accent: #2a2a44;
  --text: #e4e4ec;
  --muted: #8888a0;
  --accent: #7b68ee;
  --accent-dim: #6554d4;
  --accent-glow: rgba(123, 104, 238, 0.15);
  --accent-glow-strong: rgba(123, 104, 238, 0.3);
  --github: #f59e0b;
  --green: #34d399;
  --red: #f87171;
  --max-w: 780px;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --mono: 'SF Mono', 'Fira Code', 'Cascadia Code', 'JetBrains Mono', monospace;
}

/* ── Reset ───────────────────────────────────────── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

a { color: var(--accent); text-decoration: none; transition: color 0.15s; }
a:hover { color: var(--text); }

/* ── Buttons ─────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.5rem;
  border-radius: 8px;
  font-weight: 500;
  font-size: 0.95rem;
  text-decoration: none;
  transition: all 0.2s;
  border: none;
  cursor: pointer;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 0 20px var(--accent-glow);
}
.btn-primary:hover {
  background: var(--accent-dim);
  color: #fff;
  box-shadow: 0 0 30px var(--accent-glow-strong);
}
.btn-ghost {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  color: var(--text);
  border-color: var(--accent);
}
.btn-lg { padding: 0.8rem 2rem; font-size: 1rem; }

/* ── Hero ────────────────────────────────────────── */
.hero {
  position: relative;
  overflow: hidden;
  padding: 0 0 6rem;
}

.hero-glow {
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-glow-strong) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

nav {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 0;
}

.logo {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.logo span { color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.8rem;
}
.nav-links a {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 450;
}
.nav-links a:hover { color: var(--text); }
.nav-cta {
  padding: 0.4rem 1rem !important;
  border: 1px solid var(--border) !important;
  border-radius: 6px !important;
}
.nav-cta:hover { border-color: var(--accent) !important; }

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding-top: 5rem;
}

.badge {
  display: inline-block;
  padding: 0.3rem 0.9rem;
  border: 1px solid var(--border-accent);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.03em;
  margin-bottom: 1.5rem;
  background: var(--accent-glow);
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 3.8rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 1.2rem;
}

.gradient-text {
  background: linear-gradient(135deg, var(--accent) 0%, #a78bfa 50%, var(--accent) 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
  0%, 100% { background-position: 0% center; }
  50% { background-position: 100% center; }
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--muted);
  max-width: 540px;
  margin: 0 auto 2rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* ── Problem Cards ───────────────────────────────── */
.problem {
  padding: 4rem 0;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 2rem;
}

.problem-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  transition: border-color 0.2s;
}
.problem-card:hover { border-color: var(--border-accent); }

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

.problem-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.problem-card p {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.6;
}

.solution-banner {
  background: var(--surface);
  border: 1px solid var(--accent);
  border-radius: 12px;
  padding: 1.5rem 2rem;
  text-align: center;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.7;
  box-shadow: 0 0 30px var(--accent-glow);
}
.solution-banner strong { color: var(--text); }

/* ── Section Headers ─────────────────────────────── */
.section-header {
  text-align: center;
  margin-bottom: 3rem;
}
.section-header h2 {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}
.section-header p {
  color: var(--muted);
  font-size: 1.05rem;
}

/* ── How It Works (Flow) ─────────────────────────── */
.how-it-works {
  padding: 5rem 0;
}

.flow {
  position: relative;
  max-width: 560px;
  margin: 0 auto;
}

.flow-line {
  position: absolute;
  left: 22px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--border));
}

.flow-step {
  display: flex;
  gap: 1.25rem;
  margin-bottom: 1.25rem;
  position: relative;
}

.step-number {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface);
  border: 2px solid var(--accent);
  border-radius: 50%;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--accent);
  z-index: 1;
}

.step-content {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  flex: 1;
  transition: border-color 0.2s;
}
.step-content:hover { border-color: var(--border-accent); }

.step-content h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}
.step-content p {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.6;
  margin: 0;
}
.step-content code {
  font-family: var(--mono);
  background: var(--bg);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  font-size: 0.85em;
  color: var(--accent);
}

/* ── Architecture Diagram ────────────────────────── */
.architecture {
  padding: 5rem 0;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.arch-diagram {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2.5rem 2rem;
  overflow-x: auto;
}

.arch-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.arch-node {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  text-align: center;
  min-width: 140px;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.arch-node:hover {
  border-color: var(--accent);
  box-shadow: 0 0 20px var(--accent-glow);
}

.arch-label {
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0.25rem;
}
.arch-detail {
  font-size: 0.78rem;
  color: var(--muted);
}

.arch-arrow {
  color: var(--accent);
  font-size: 1.4rem;
  font-weight: 300;
}

.arch-note {
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

/* ── Security ────────────────────────────────────── */
.security {
  padding: 5rem 0;
}

.crypto-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.crypto-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
}

.crypto-card h3 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin-bottom: 1rem;
}

.crypto-card ul {
  list-style: none;
}

.crypto-card li {
  display: flex;
  flex-direction: column;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.88rem;
}
.crypto-card li:last-child { border: none; }
.crypto-card li strong {
  color: var(--text);
  font-weight: 600;
  font-size: 0.85rem;
}
.crypto-card li span {
  color: var(--muted);
  font-size: 0.83rem;
}

.crypto-note {
  color: var(--muted);
  font-size: 0.9rem;
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

/* ── Decentralized Gateways ──────────────────────── */
.decentralized {
  padding: 5rem 0;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.gateway-comparison {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.gw-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  transition: border-color 0.2s;
}
.gw-card:hover { border-color: var(--border-accent); }
.gw-highlight {
  border-color: var(--accent);
  box-shadow: 0 0 30px var(--accent-glow);
}

.gw-link {
  color: inherit;
  text-decoration: none;
  display: block;
}

.gw-badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}
.gw-cloudflare {
  background: var(--accent-glow);
  color: var(--accent);
}
.gw-github {
  background: rgba(245, 158, 11, 0.15);
  color: var(--github);
}

.gw-domain {
  font-family: var(--mono);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.gw-desc {
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.6;
  margin-bottom: 1rem;
}

.gw-details {
  list-style: none;
}
.gw-details li {
  display: flex;
  justify-content: space-between;
  padding: 0.35rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.83rem;
}
.gw-details li:last-child { border: none; }
.gw-details li strong {
  color: var(--text);
  font-weight: 600;
}
.gw-details li span {
  color: var(--muted);
}

.decentralized-note {
  background: var(--surface);
  border: 1px solid var(--accent);
  border-radius: 12px;
  padding: 1.5rem 2rem;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.7;
  box-shadow: 0 0 30px var(--accent-glow);
}
.decentralized-note strong { color: var(--text); }
.decentralized-note em { color: var(--text); font-style: normal; }
.decentralized-note code {
  font-family: var(--mono);
  background: var(--bg);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  font-size: 0.85em;
  color: var(--accent);
}

/* ── Federation ──────────────────────────────────── */
.federation {
  padding: 5rem 0;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.fed-explanation {
  max-width: 600px;
  margin: 0 auto 2rem;
  text-align: center;
}
.fed-explanation p {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
}
.fed-explanation strong { color: var(--text); }
.fed-explanation code {
  font-family: var(--mono);
  background: var(--surface);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  font-size: 0.85em;
  color: var(--accent);
}

.fed-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 2rem;
}

.fed-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
  text-align: center;
  transition: border-color 0.2s;
}
.fed-card:hover { border-color: var(--accent); }

.fed-domain {
  font-family: var(--mono);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 0.4rem;
}
.fed-desc {
  font-size: 0.82rem;
  color: var(--muted);
}

.fed-link {
  display: block;
  text-decoration: none;
  color: inherit;
}
.fed-link:hover { color: inherit; }
.fed-link .fed-domain { transition: color 0.15s; }
.fed-link:hover .fed-domain { color: var(--text); }

.fed-note {
  background: var(--surface);
  border: 1px solid var(--accent);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.7;
  text-align: center;
  margin-bottom: 2rem;
  box-shadow: 0 0 30px var(--accent-glow);
}
.fed-note strong { color: var(--text); }
.fed-note code {
  font-family: var(--mono);
  background: var(--bg);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  font-size: 0.85em;
  color: var(--accent);
}

/* ── Code Blocks ─────────────────────────────────── */
.code-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 1.25rem;
}

.code-header {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.75rem 1.25rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}

.code-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border-accent);
}
.code-dot:nth-child(1) { background: var(--red); opacity: 0.6; }
.code-dot:nth-child(2) { background: #fbbf24; opacity: 0.6; }
.code-dot:nth-child(3) { background: var(--green); opacity: 0.6; }

.code-title {
  margin-left: 0.5rem;
  font-size: 0.78rem;
  color: var(--muted);
  font-family: var(--mono);
}

pre {
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  font-size: 0.83rem;
  line-height: 1.7;
  margin: 0;
}

code {
  font-family: var(--mono);
  color: var(--text);
}

/* syntax hints */
code .c { color: #5c5c7a; }  /* comment */
code .s { color: #a5d6a7; }  /* string */
code .k { color: #c792ea; }  /* keyword */
code .n { color: #f78c6c; }  /* number */

/* ── Gateway Section ─────────────────────────────── */
.gateway {
  padding: 5rem 0;
}

.gateway-note {
  color: var(--muted);
  font-size: 0.9rem;
  text-align: center;
}
.gateway-note code {
  font-family: var(--mono);
  background: var(--surface);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  font-size: 0.85em;
  color: var(--accent);
}

/* ── Event Spec ──────────────────────────────────── */
.event-spec {
  padding: 5rem 0;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.event-note {
  color: var(--muted);
  font-size: 0.9rem;
  text-align: center;
  margin-top: 0.5rem;
}
.event-note code {
  font-family: var(--mono);
  background: var(--surface);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  font-size: 0.85em;
  color: var(--accent);
}

/* ── Developers ──────────────────────────────────── */
.developers {
  padding: 5rem 0;
}

.dev-content {
  max-width: 600px;
  margin: 0 auto;
}

.dev-note {
  color: var(--muted);
  font-size: 0.9rem;
  text-align: center;
  margin-top: 0.5rem;
}

/* ── CTA ─────────────────────────────────────────── */
.cta {
  padding: 5rem 0;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
}

.cta-content {
  text-align: center;
}

.cta h2 {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.cta p {
  color: var(--muted);
  font-size: 1.05rem;
  margin-bottom: 2rem;
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

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

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-logo {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.footer-logo span { color: var(--accent); }

.footer-content p {
  color: var(--muted);
  font-size: 0.82rem;
  margin: 0;
}
.footer-content a { color: var(--accent); }
.footer-content a:hover { color: var(--text); }

/* ── Responsive ──────────────────────────────────── */
@media (max-width: 768px) {
  .nav-links a:not(.nav-cta) { display: none; }

  .hero-content { padding-top: 3rem; }

  .problem-grid,
  .gateway-comparison,
  .crypto-grid,
  .fed-grid {
    grid-template-columns: 1fr;
  }

  .arch-row {
    flex-direction: column;
  }
  .arch-arrow {
    transform: rotate(90deg);
  }

  .footer-content {
    flex-direction: column;
    gap: 0.75rem;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 2rem; }
  .section-header h2 { font-size: 1.4rem; }
  .btn-lg { padding: 0.65rem 1.4rem; font-size: 0.9rem; }
}