/* ── Reset & base ─────────────────────────────────────────────────────────── */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #0a0e13;
  --surface:   #111827;
  --surface2:  #1a2236;
  --border:    #1f2d40;
  --text:      #e2e8f0;
  --muted:     #64748b;
  --accent:    #22d3a0;
  --accent-dim:#0d9970;
  --code-bg:   #0d1117;
  --code-c:    #6b8ca8;  /* comments */
  --code-kw:   #79b8ff;  /* keywords */
  --code-s:    #9ecbff;  /* strings */
  --code-ty:   #b392f0;  /* types */

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  --max-w: 1100px;
  --radius: 8px;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

code {
  font-family: var(--mono);
  font-size: 0.875em;
  background: var(--code-bg);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  color: #c9d1d9;
}

/* ── Nav ──────────────────────────────────────────────────────────────────── */

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(10, 14, 19, 0.92);
  backdrop-filter: blur(8px);
  z-index: 100;
}

.logo {
  font-family: var(--mono);
  font-size: 1rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  gap: 1.75rem;
}

.nav-links a {
  font-size: 0.875rem;
  color: var(--muted);
  transition: color 0.15s;
}
.nav-links a:hover { color: var(--text); text-decoration: none; }

/* ── Hero ─────────────────────────────────────────────────────────────────── */

.hero {
  padding: 6rem 2rem 4rem;
  text-align: center;
}

.hero-inner {
  max-width: 720px;
  margin: 0 auto;
}

.badge {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--accent);
  border: 1px solid var(--accent-dim);
  border-radius: 999px;
  padding: 0.25rem 0.875rem;
  margin-bottom: 1.75rem;
  letter-spacing: 0.02em;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}

.tagline {
  font-size: 1.125rem;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 2.25rem;
}

.cta-row {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-primary {
  background: var(--accent);
  color: #0a0e13;
  font-weight: 600;
  font-size: 0.9375rem;
  padding: 0.625rem 1.5rem;
  border-radius: var(--radius);
  transition: background 0.15s, transform 0.1s;
}
.btn-primary:hover {
  background: #2ef7ba;
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-ghost {
  color: var(--text);
  font-size: 0.9375rem;
  padding: 0.625rem 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.15s, color 0.15s;
}
.btn-ghost:hover {
  border-color: var(--muted);
  text-decoration: none;
}

/* ── Code blocks ──────────────────────────────────────────────────────────── */

.code-block {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  font-family: var(--mono);
  font-size: 0.8125rem;
  line-height: 1.65;
  color: #c9d1d9;
  overflow-x: auto;
  white-space: pre;
}

.code-block .c  { color: var(--code-c); }
.code-block .kw { color: var(--code-kw); }
.code-block .s  { color: var(--code-s); }
.code-block .ty { color: var(--code-ty); }

/* ── Two-sided code preview ───────────────────────────────────────────────── */

.two-sided {
  max-width: var(--max-w);
  margin: 0 auto 5rem;
  padding: 0 2rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.side-panel {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.panel-label {
  font-size: 0.75rem;
  font-family: var(--mono);
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ── Section shared ───────────────────────────────────────────────────────── */

section { padding: 4rem 2rem; }

h2 {
  font-size: 1.875rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 0.625rem;
}

.section-sub {
  color: var(--muted);
  font-size: 1rem;
  margin-bottom: 2.5rem;
}

/* ── How it works ─────────────────────────────────────────────────────────── */

.how-it-works {
  max-width: 720px;
  margin: 0 auto;
  border-top: 1px solid var(--border);
}

.flow {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.flow-step {
  display: flex;
  gap: 1.5rem;
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--border);
}

.step-num {
  flex-shrink: 0;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.8125rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-body h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.375rem;
}

.step-body p {
  font-size: 0.9375rem;
  color: var(--muted);
  line-height: 1.65;
}

.flow-arrow {
  text-align: left;
  padding-left: 0.875rem;
  color: var(--border);
  font-size: 1.25rem;
  line-height: 0.5;
}

/* ── Pillars ──────────────────────────────────────────────────────────────── */

.pillars {
  max-width: var(--max-w);
  margin: 0 auto;
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  padding: 4rem 2rem;
}

.pillar {
  padding: 1.75rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.pillar-icon {
  font-size: 1.5rem;
  margin-bottom: 0.875rem;
}

.pillar h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.pillar p {
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.65;
}

/* ── Transports ───────────────────────────────────────────────────────────── */

.transports {
  max-width: var(--max-w);
  margin: 0 auto;
  border-top: 1px solid var(--border);
}

.transport-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.transport-card {
  padding: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.transport-name {
  font-family: var(--mono);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.feature-flag {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--muted);
  font-weight: 400;
}

.transport-desc {
  font-size: 0.8125rem;
  color: var(--muted);
  line-height: 1.6;
}

/* ── Install ──────────────────────────────────────────────────────────────── */

.install {
  max-width: var(--max-w);
  margin: 0 auto;
  border-top: 1px solid var(--border);
}

.install-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.install-col {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.install-label {
  font-size: 0.75rem;
  font-family: var(--mono);
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ── Hosted API callout ───────────────────────────────────────────────────── */

.api-callout {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.callout-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.callout-inner h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.625rem;
}

.callout-inner p {
  font-size: 0.9375rem;
  color: var(--muted);
  line-height: 1.65;
}

.callout-code {
  font-size: 0.75rem;
}

/* ── Community ────────────────────────────────────────────────────────────── */

.community {
  border-top: 1px solid var(--border);
}

.community-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}

.community-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.community-card {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  padding: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  transition: border-color 0.15s, background 0.15s;
}
.community-card:hover {
  border-color: var(--accent-dim);
  background: var(--surface2);
  text-decoration: none;
}

.community-icon {
  flex-shrink: 0;
  color: var(--accent);
  margin-top: 2px;
}

.community-title {
  font-weight: 600;
  font-size: 0.9375rem;
  margin-bottom: 0.375rem;
}

.community-desc {
  font-size: 0.8125rem;
  color: var(--muted);
  line-height: 1.6;
}

/* ── Footer ───────────────────────────────────────────────────────────────── */

footer {
  border-top: 1px solid var(--border);
  padding: 2rem;
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}

.footer-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.footer-copy {
  font-size: 0.8125rem;
  color: var(--muted);
}

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

.footer-links a {
  font-size: 0.8125rem;
  color: var(--muted);
}
.footer-links a:hover { color: var(--text); text-decoration: none; }

/* ── Responsive ───────────────────────────────────────────────────────────── */

@media (max-width: 900px) {
  .two-sided,
  .install-cols,
  .callout-inner,
  .pillars,
  .community-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 600px) {
  nav { padding: 1rem; }
  .nav-links { gap: 1rem; }

  .hero { padding: 3.5rem 1rem 2.5rem; }
  section { padding: 3rem 1rem; }

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

  .footer-inner { flex-direction: column; align-items: flex-start; }
}