:root {
  --abyss: #050507;
  --carbon: #101010;
  --carbon-2: #161618;
  --charcoal: #3d3a39;
  --charcoal-soft: rgba(61, 58, 57, 0.6);
  --green: #00d992;
  --mint: #2fd6a1;
  --btc: #f7931a; /* bitcoin orange */
  --green-dim: rgba(0, 217, 146, 0.12);
  --green-ring: rgba(0, 217, 146, 0.45);
  --snow: #f2f2f2;
  --parchment: #b8b3b0;
  --steel: #8b949e;
  --fog: #bdbdbd;
  --radius: 8px;
  --radius-sm: 6px;
  --glow-warm: rgba(92, 88, 85, 0.2) 0px 0px 15px;
  --glow-green: rgba(0, 217, 146, 0.18) 0px 0px 24px;
  --font-body: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--abyss);
  color: var(--snow);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  font-feature-settings: "calt", "rlig";
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.mono { font-family: var(--font-mono); }
.accent { color: var(--green); }
.btc, .btc .accent { color: var(--btc); }
.parchment { color: var(--parchment); }
.steel { color: var(--steel); }

a { color: var(--mint); text-decoration: none; }
a:hover { color: var(--green); }

h1, h2, h3 { font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif; font-weight: 700; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(5, 5, 7, 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--charcoal);
}
.nav-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-top: 14px; padding-bottom: 14px; }
.brand { display: inline-flex; align-items: baseline; gap: 8px; color: var(--snow); }
.brand:hover { color: var(--snow); }
.brand-bolt {
  color: var(--green);
  animation: bolt-pulse 3s ease-in-out infinite;
}
@keyframes bolt-pulse {
  0%, 100% { text-shadow: 0 0 2px var(--green); }
  50% { text-shadow: 0 0 10px var(--green), 0 0 22px var(--green-ring); }
}
.brand-text { font-weight: 600; font-size: 18px; letter-spacing: -0.4px; }
.brand-tag { font-family: var(--font-mono); font-size: 12px; color: var(--steel); }
.site-nav { display: flex; align-items: center; gap: 22px; }
.site-nav a:not(.btn) { color: var(--fog); font-size: 14.5px; font-weight: 500; }
.site-nav a:not(.btn):hover { color: var(--green); }
.site-nav a.active { color: var(--green); }
.nav-toggle { display: none; background: none; border: 1px solid var(--charcoal); color: var(--snow); border-radius: var(--radius-sm); font-size: 18px; padding: 4px 10px; cursor: pointer; }

/* ---------- buttons ---------- */
.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 15px; font-weight: 600;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--charcoal);
  transition: all .18s ease;
  cursor: pointer;
}
.btn-primary { background: var(--carbon); color: var(--mint); border-color: var(--green-ring); }
.btn-primary:hover { background: var(--carbon-2); color: var(--green); box-shadow: var(--glow-green); }
.btn-ghost { background: transparent; color: var(--snow); }
.btn-ghost:hover { background: rgba(255,255,255,0.04); border-color: var(--fog); color: var(--snow); }
.btn-big { padding: 15px 28px; font-size: 16px; }

/* ---------- hero ---------- */
.hero { position: relative; overflow: hidden; padding: 96px 0 72px; }
.hero::before {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(rgba(255,255,255,0.055) 1px, transparent 1px);
  background-size: 26px 26px;
  mask-image: radial-gradient(ellipse 90% 80% at 50% 0%, black 30%, transparent 75%);
  pointer-events: none;
}
.hero-grid { position: relative; display: grid; grid-template-columns: 1.15fr 1fr; gap: 48px; align-items: center; }
.eyebrow {
  font-family: var(--font-mono); font-size: 13px; letter-spacing: 2.5px;
  text-transform: uppercase; color: var(--green); margin-bottom: 20px;
}
.hero h1 {
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1.04; letter-spacing: -0.9px; margin-bottom: 22px;
}
.hero .sub { font-size: 18px; color: var(--parchment); max-width: 54ch; margin-bottom: 30px; }
.hero .sub strong { color: var(--snow); font-weight: 600; }
.cta-row { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 26px; }
.trust-strip { display: flex; flex-wrap: wrap; gap: 10px; }
.trust-strip span {
  font-family: var(--font-mono); font-size: 12px; color: var(--steel);
  border: 1px solid var(--charcoal); border-radius: 9999px; padding: 5px 12px;
}

/* ---------- terminal card ---------- */
.terminal {
  background: var(--carbon);
  border: 2px solid var(--green);
  border-radius: var(--radius);
  box-shadow: rgba(0,0,0,0.7) 0px 20px 60px, var(--glow-green);
  overflow: hidden;
}
.terminal-bar {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 14px; border-bottom: 1px solid var(--charcoal);
  background: var(--carbon-2);
}
.terminal-bar .dot { width: 11px; height: 11px; border-radius: 50%; background: var(--charcoal); }
.terminal-bar .dot.g { background: var(--green); box-shadow: 0 0 6px var(--green-ring); }
.terminal-bar .title { font-family: var(--font-mono); font-size: 12px; color: var(--steel); margin-left: 8px; }
.terminal-body { padding: 18px 18px 22px; font-family: var(--font-mono); font-size: 13.5px; line-height: 1.75; }
.terminal-body .p { color: var(--green); }
.terminal-body .c { color: var(--snow); }
.terminal-body .o { color: var(--steel); }
.terminal-body .ok { color: var(--mint); }
.cursor { display: inline-block; width: 8px; height: 15px; background: var(--green); vertical-align: text-bottom; animation: blink 1.1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* ---------- install block ---------- */
.install {
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
  background: var(--carbon); border: 1px solid var(--charcoal);
  border-radius: var(--radius-sm); padding: 14px 18px;
  font-family: var(--font-mono); font-size: 14px; color: var(--snow);
}
.install .dollar { color: var(--green); margin-right: 8px; }
.copy-btn {
  font-family: var(--font-mono); font-size: 12px; font-weight: 700;
  background: transparent; color: var(--mint); border: 1px solid var(--green-ring);
  border-radius: var(--radius-sm); padding: 6px 12px; cursor: pointer; white-space: nowrap;
}
.copy-btn:hover { background: var(--green-dim); }

/* ---------- sections ---------- */
section.block { padding: 88px 0; }
section.block.tight { padding: 56px 0; }
.section-label {
  font-family: var(--font-mono); font-size: 13px; letter-spacing: 2.5px;
  text-transform: uppercase; color: var(--green); margin-bottom: 14px;
}
h2.section-title { font-size: clamp(26px, 3.4vw, 38px); line-height: 1.12; letter-spacing: -0.7px; margin-bottom: 16px; }
.section-intro { color: var(--parchment); font-size: 17px; max-width: 66ch; }
.divider { border: none; border-top: 1px dashed rgba(79, 93, 117, 0.4); margin: 0; }

/* ---------- cards ---------- */
.card-grid { display: grid; gap: 20px; margin-top: 40px; }
.cols-2 { grid-template-columns: repeat(2, 1fr); }
.cols-3 { grid-template-columns: repeat(3, 1fr); }
.cols-4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: var(--carbon);
  border: 1px solid var(--charcoal);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: var(--glow-warm);
  transition: border-color .18s ease, transform .18s ease;
}
.card:hover { border-color: rgba(0, 217, 146, 0.45); transform: translateY(-2px); }
.card.flagship { border: 2px solid var(--green); }
.card .icon { font-size: 26px; margin-bottom: 14px; display: block; }
.card h3 { font-size: 19px; letter-spacing: -0.3px; margin-bottom: 10px; }
.card p { color: var(--parchment); font-size: 15px; }
.card .tag {
  display: inline-block; font-family: var(--font-mono); font-size: 11px;
  letter-spacing: 1.5px; text-transform: uppercase; color: var(--mint);
  border: 1px solid var(--green-ring); border-radius: 9999px; padding: 3px 10px; margin-bottom: 14px;
}
.card .tag.btc-tag { color: var(--btc); border-color: rgba(247, 147, 26, 0.55); }

/* ---------- steps ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 40px; }
.step {
  background: var(--carbon); border: 1px dashed rgba(79, 93, 117, 0.4);
  border-radius: var(--radius); padding: 24px; position: relative;
}
.step .num { font-family: var(--font-mono); font-size: 13px; color: var(--green); margin-bottom: 10px; display: block; }
.step h3 { font-size: 17px; margin-bottom: 8px; }
.step p { color: var(--parchment); font-size: 14.5px; }

/* ---------- quote / banner ---------- */
.quote-band { background: var(--carbon); border-top: 1px solid var(--charcoal); border-bottom: 1px solid var(--charcoal); padding: 64px 0; }
.quote-band blockquote { font-size: clamp(20px, 2.6vw, 28px); line-height: 1.4; letter-spacing: -0.4px; font-weight: 500; max-width: 34ch; margin: 0 auto; text-align: center; }
.quote-band cite { display: block; margin-top: 18px; font-style: normal; font-family: var(--font-mono); font-size: 13px; color: var(--steel); text-align: center; }

.cta-band { padding: 88px 0; text-align: center; position: relative; overflow: hidden; }
.cta-band::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(ellipse 60% 70% at 50% 100%, var(--green-dim), transparent);
  pointer-events: none;
}
.cta-band h2 { font-size: clamp(26px, 3.4vw, 40px); letter-spacing: -0.7px; margin-bottom: 14px; position: relative; }
.cta-band p { color: var(--parchment); margin-bottom: 30px; position: relative; }
.cta-band .cta-row { justify-content: center; position: relative; }

/* ---------- table ---------- */
table.spec { width: 100%; border-collapse: collapse; margin-top: 32px; font-size: 15px; }
table.spec th, table.spec td { text-align: left; padding: 13px 16px; border-bottom: 1px solid var(--charcoal); vertical-align: top; }
table.spec th { font-family: var(--font-mono); font-size: 12px; letter-spacing: 1.5px; text-transform: uppercase; color: var(--steel); font-weight: 500; }
table.spec td { color: var(--parchment); }
table.spec td:first-child { color: var(--snow); font-weight: 500; white-space: nowrap; }
table.spec tr:hover td { background: rgba(255,255,255,0.015); }

/* ---------- FAQ ---------- */
.faq { margin-top: 36px; display: grid; gap: 14px; }
.faq details {
  background: var(--carbon); border: 1px solid var(--charcoal);
  border-radius: var(--radius); padding: 18px 22px;
}
.faq summary { cursor: pointer; font-weight: 600; font-size: 16px; color: var(--snow); list-style: none; position: relative; padding-right: 28px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 0; top: -1px; color: var(--green); font-family: var(--font-mono); font-size: 18px; }
.faq details[open] summary::after { content: "–"; }
.faq details p { margin-top: 12px; color: var(--parchment); font-size: 15px; }

/* ---------- use-case list ---------- */
.usecase-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin-top: 32px; }
.usecase {
  display: flex; gap: 12px; align-items: flex-start;
  background: var(--carbon); border: 1px solid var(--charcoal);
  border-radius: var(--radius-sm); padding: 16px 18px;
}
.usecase .uc-icon { color: var(--green); font-family: var(--font-mono); font-size: 14px; margin-top: 3px; }
.usecase strong { color: var(--snow); display: block; font-size: 15px; margin-bottom: 3px; }
.usecase span.desc { color: var(--steel); font-size: 14px; }

/* ---------- prose pages ---------- */
.prose { max-width: 74ch; }
.prose h2 { font-size: 26px; letter-spacing: -0.4px; margin: 44px 0 14px; }
.prose h3 { font-size: 19px; margin: 28px 0 10px; }
.prose p { color: var(--parchment); margin-bottom: 16px; }
.prose p strong, .prose li strong { color: var(--snow); }
.prose ul, .prose ol { color: var(--parchment); padding-left: 22px; margin-bottom: 16px; }
.prose li { margin-bottom: 7px; }
.prose .install { margin: 20px 0; }
.callout, .prose .callout {
  border-left: 3px solid var(--green); background: var(--green-dim);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 16px 20px; margin: 24px 0; color: var(--snow); font-size: 15px;
}

.page-head { padding: 72px 0 8px; }
.page-head .eyebrow { margin-bottom: 14px; }
.page-head h1 { font-size: clamp(30px, 4.4vw, 48px); line-height: 1.08; letter-spacing: -0.8px; margin-bottom: 16px; }
.page-head .sub { color: var(--parchment); font-size: 18px; max-width: 62ch; }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--charcoal); padding: 56px 0 32px; background: var(--carbon); }
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1.2fr; gap: 40px; margin-bottom: 40px; }
.footer-grid h4 { font-family: var(--font-mono); font-size: 12px; letter-spacing: 2px; text-transform: uppercase; color: var(--steel); margin-bottom: 12px; font-weight: 500; }
.footer-grid p { color: var(--fog); font-size: 14px; line-height: 1.9; }
.footer-grid a { color: var(--fog); }
.footer-grid a:hover { color: var(--green); }
.footer-note { color: var(--steel) !important; font-size: 13.5px !important; margin-top: 12px; }
.footer-base { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; border-top: 1px solid var(--charcoal); padding-top: 22px; color: var(--steel); font-size: 13px; }

/* ---------- responsive ---------- */
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; }
  .cols-3, .cols-4 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
}
@media (max-width: 680px) {
  .cols-2, .cols-3, .cols-4, .steps, .usecase-grid { grid-template-columns: 1fr; }
  section.block { padding: 64px 0; }
  .nav-toggle { display: block; }
  .site-nav {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--carbon); border-bottom: 1px solid var(--charcoal); padding: 10px 24px 18px;
  }
  .site-nav.open { display: flex; }
  .site-nav a:not(.btn) { padding: 12px 0; border-bottom: 1px solid rgba(61,58,57,0.4); font-size: 16px; }
  .nav-cta { margin-top: 14px; text-align: center; }
}
@media (prefers-reduced-motion: reduce) {
  .brand-bolt { animation: none; }
  html { scroll-behavior: auto; }
}