/* NolGas site — brand tokens per nolgas-design/brand-guidelines.md */
:root {
  --primary: #F59E0B;
  --primary-hi: #FBBF24;
  --primary-deep: #D97706;
  --accent: #8B5CF6;
  --bg: #0F172A;
  --surface: #111A2E;
  --surface-2: #162136;
  --border: #334155;
  --fg: #F8FAFC;
  --muted: #8B98AE;
  --destructive: #EF4444;
  --on-primary: #0F172A;
  --good: #34D399;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
.mono { font-family: 'JetBrains Mono', monospace; font-variant-numeric: tabular-nums; }
h1, h2, h3 { font-family: 'Chakra Petch', sans-serif; font-weight: 700; line-height: 1.15; margin: 0 0 12px; }
h3 { font-weight: 600; font-size: 19px; }
p { margin: 0 0 12px; }
a { color: var(--accent); }
img { max-width: 100%; }

/* Header */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  display: flex; align-items: center; gap: 16px;
  height: 64px; padding: 0 20px;
  background: rgba(15, 23, 42, .9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; min-height: 44px; }
.nav { display: flex; gap: 4px; margin-left: auto; }
.nav a {
  color: var(--muted); text-decoration: none; font-size: 15px;
  padding: 10px 12px; border-radius: 8px; min-height: 44px; display: inline-flex; align-items: center;
  transition: color .15s;
}
.nav a:hover { color: var(--fg); }
.menu-btn {
  display: none; margin-left: auto;
  background: none; border: 1px solid var(--border); border-radius: 8px;
  color: var(--fg); width: 44px; height: 44px; cursor: pointer;
  align-items: center; justify-content: center;
}

/* Buttons — the ONE brand gradient lives on .btn-primary */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: 12px 22px; border-radius: 10px;
  font-family: 'Chakra Petch', sans-serif; font-weight: 600; font-size: 16px;
  text-decoration: none; cursor: pointer; border: 1px solid transparent;
  transition: transform .15s ease-out, box-shadow .15s ease-out, border-color .15s;
}
.btn-primary {
  background: linear-gradient(180deg, var(--primary-hi), var(--primary-deep));
  color: var(--on-primary);
}
.btn-primary:hover { box-shadow: 0 6px 22px rgba(245, 158, 11, .35); transform: translateY(-1px); }
.btn-ghost { border-color: var(--border); color: var(--fg); background: transparent; }
.btn-ghost:hover { border-color: var(--muted); }
.btn-header { margin-left: 4px; min-height: 42px; padding: 8px 16px; font-size: 15px; }
.btn-lg { min-height: 56px; padding: 16px 32px; font-size: 18px; }
.btn:focus-visible, a:focus-visible, .menu-btn:focus-visible, input:focus-visible, summary:focus-visible {
  outline: 2px solid var(--primary); outline-offset: 2px;
}

/* Layout */
main { padding-top: 64px; }
.section { max-width: 1120px; margin: 0 auto; padding: 56px 20px; }
.section-sub { color: var(--muted); max-width: 56ch; margin-bottom: 28px; }
h2 { font-size: 28px; }
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 14px; padding: 22px;
}
.grid-2, .grid-3 { display: grid; gap: 14px; }

/* Hero */
.hero {
  position: relative; max-width: 1120px; margin: 0 auto;
  padding: 72px 20px 56px; text-align: left; overflow: hidden;
}
.hero h1 { font-size: clamp(38px, 9vw, 64px); letter-spacing: .01em; margin-bottom: 16px; }
.amber { color: var(--primary); }
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: 'JetBrains Mono', monospace; font-size: 12.5px;
  color: var(--primary-hi); background: rgba(245, 158, 11, .1);
  border: 1px solid rgba(245, 158, 11, .35); border-radius: 999px;
  padding: 6px 14px; margin: 0 0 18px;
}
.badge::before { content: ''; width: 7px; height: 7px; border-radius: 50%; background: var(--good); }
.sub { font-size: 18px; color: var(--muted); max-width: 46ch; margin-bottom: 26px; }
.sub strong { color: var(--fg); }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 26px; }
.cta-row.center { justify-content: center; margin-top: 30px; margin-bottom: 0; }
.chips { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 0; }
.chips li {
  font-size: 13.5px; color: var(--muted);
  border: 1px solid var(--border); border-radius: 999px; padding: 7px 14px;
}
.hero-stage {
  position: relative; display: flex; justify-content: center;
  margin: 34px 0 0; pointer-events: none;
}
.hero-mark { width: min(46vw, 190px); height: auto; }
.hero-glow {
  position: absolute; inset: -55% -45%;
  background: radial-gradient(circle, rgba(245, 158, 11, .2), rgba(139, 92, 246, .06) 55%, transparent 70%);
}

/* Calculator */
.calc { padding: 26px 22px; }
.calc-label { display: flex; justify-content: space-between; align-items: baseline; font-weight: 600; margin-bottom: 10px; }
.calc-label output { color: var(--primary-hi); font-size: 22px; }
input[type="range"] {
  width: 100%; height: 44px; margin: 0 0 14px; accent-color: var(--primary);
  cursor: pointer; background: transparent;
}
.toggle { display: flex; align-items: center; gap: 10px; cursor: pointer; min-height: 44px; }
.toggle input { width: 20px; height: 20px; accent-color: var(--primary); cursor: pointer; }
.toggle small { color: var(--muted); display: block; }
.calc-outputs { display: grid; gap: 10px; margin-top: 18px; }
.calc-stat {
  display: flex; justify-content: space-between; align-items: baseline; gap: 12px;
  border-top: 1px solid var(--border); padding-top: 10px;
}
.calc-k { color: var(--muted); font-size: 14.5px; }
.calc-v { font-size: 18px; font-weight: 500; }
.calc-stat.total { border-top: 2px solid var(--primary); }
.calc-stat.total .calc-k { color: var(--fg); font-weight: 600; }
.calc-stat.total .calc-v { font-size: 26px; }
.good { color: var(--good); }
.burn { color: var(--destructive); }
.footnote { color: var(--muted); font-size: 13px; margin: 16px 0 0; }

/* Compare cards */
.compare .big { font-size: 26px; font-weight: 500; margin: 4px 0 8px; }
.compare.bad .big { color: var(--destructive); }
.compare.good .big { color: var(--good); }
.compare p:last-child { color: var(--muted); margin: 0; }

/* How it works — bot journey (autoplaying phone) */
.bj { display: grid; gap: 30px; }
.bj-steps { display: grid; gap: 6px; align-content: center; }
.bj-step {
  display: flex; gap: 14px; align-items: flex-start;
  padding: 14px 16px; border-radius: 12px; border: 1px solid transparent;
  transition: background .3s, border-color .3s;
  cursor: pointer; user-select: none;
}
.bj-step:hover { border-color: var(--border); }
.bj-step:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.bj-step.on { background: var(--surface); border-color: var(--border); }
.bj-body { flex: 1; }
.bj-n {
  flex: none; width: 30px; height: 30px; border-radius: 9px;
  display: flex; align-items: center; justify-content: center; font-size: 14px;
  background: var(--surface-2); border: 1px solid var(--border); color: var(--muted);
  transition: all .3s;
}
.bj-step.on .bj-n {
  background: linear-gradient(180deg, var(--primary-hi), var(--primary-deep));
  color: var(--on-primary); border-color: transparent;
}
.bj-step p { margin: 0; color: var(--muted); font-size: 14.5px; }
.bj-bar { height: 3px; border-radius: 2px; background: var(--border); margin-top: 8px; overflow: hidden; opacity: 0; }
.bj-step.on .bj-bar { opacity: 1; }
.bj-bar i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--primary-hi), var(--primary-deep)); }
.phone {
  justify-self: center; width: 262px;
  border: 1px solid var(--border); border-radius: 30px; background: #0B1222;
  padding: 14px 12px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, .45), 0 0 40px rgba(245, 158, 11, .07);
}
.phone-top { display: flex; align-items: center; gap: 8px; padding: 4px 6px 12px; border-bottom: 1px solid var(--border); }
.phone-av { width: 26px; height: 26px; border-radius: 50%; background: var(--bg); display: flex; align-items: center; justify-content: center; }
.phone-av img { width: 16px; }
.phone-name { font-family: 'Chakra Petch', sans-serif; font-weight: 600; font-size: 13px; }
.phone-name b { color: var(--primary); }
.phone-scr { position: relative; height: 300px; overflow: hidden; }
.scr {
  position: absolute; inset: 0; padding: 12px 4px;
  display: flex; flex-direction: column; gap: 8px;
  opacity: 0; transform: translateX(24px);
  transition: opacity .45s, transform .45s; pointer-events: none;
}
.scr.on { opacity: 1; transform: none; }
.bub {
  max-width: 94%; background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 12px 12px 12px 4px; padding: 9px 11px;
  font-size: 12.5px; line-height: 1.45; color: var(--fg);
}
.bub .mono { font-size: 11px; color: var(--primary-hi); word-break: break-all; }
.bub.me { align-self: flex-end; border-radius: 12px 12px 4px 12px; background: rgba(245, 158, 11, .14); border-color: rgba(245, 158, 11, .35); }
.bub.sysnote { align-self: center; text-align: center; font-size: 11.5px; color: var(--muted); background: var(--surface); border-radius: 999px; }
.sysnote2 { align-self: center; font-size: 10.5px; color: var(--muted); background: var(--surface); border: 1px solid var(--border); border-radius: 999px; padding: 4px 12px; }
.kb { display: flex; gap: 6px; flex-wrap: wrap; margin-top: auto; }
.kb span { font-size: 11.5px; padding: 7px 10px; border-radius: 8px; background: var(--surface); border: 1px solid var(--border); color: var(--muted); }
.kb span.hot { background: linear-gradient(180deg, var(--primary-hi), var(--primary-deep)); color: var(--on-primary); border-color: transparent; font-weight: 600; }

/* Products — price-first cards */
.products { align-items: stretch; margin-top: 28px; }
.product { position: relative; display: flex; flex-direction: column; gap: 8px; padding: 24px 22px; }
.product.pop { border-color: rgba(245, 158, 11, .55); }
.pop-badge {
  position: absolute; top: -11px; left: 18px;
  background: linear-gradient(180deg, var(--primary-hi), var(--primary-deep));
  color: var(--on-primary); font-family: 'Chakra Petch', sans-serif; font-weight: 600;
  font-size: 11.5px; letter-spacing: .04em; text-transform: uppercase;
  border-radius: 999px; padding: 3px 12px;
}
.product-head { display: flex; align-items: center; gap: 10px; }
.product-head h3 { margin: 0; }
.p-ic {
  flex: none; width: 38px; height: 38px; border-radius: 10px; color: var(--primary);
  background: rgba(245, 158, 11, .1); border: 1px solid rgba(245, 158, 11, .3);
  display: flex; align-items: center; justify-content: center;
}
.p-price { font-size: 30px; font-weight: 500; color: var(--fg); margin: 6px 0 0; }
.p-price small { display: block; font-size: 13px; color: var(--muted); font-weight: 400; margin-top: 2px; }
.p-line { color: var(--muted); font-size: 14.5px; margin: 0; }

/* Pricing — list rows with strikethrough burn + savings pill */
.plist { padding: 8px 20px 16px; }
.plist-cap {
  font-family: 'Chakra Petch', sans-serif; font-weight: 600; font-size: 12.5px;
  text-transform: uppercase; letter-spacing: .08em; color: var(--primary);
  margin: 16px 0 4px;
}
.prow {
  display: flex; justify-content: space-between; align-items: center; gap: 10px;
  padding: 13px 0; border-bottom: 1px solid var(--border);
}
.prow:last-of-type { border-bottom: none; }
.prow-name { font-size: 14.5px; white-space: nowrap; }
.prow-name small { display: block; color: var(--muted); font-size: 12.5px; }
.prow-val { display: flex; align-items: baseline; gap: 8px; flex: none; }
.prow-val b { font-size: 16px; font-weight: 500; white-space: nowrap; }
.prow-val s { color: var(--muted); font-size: 13px; }
.prow-val em {
  font-style: normal; font-family: 'JetBrains Mono', monospace; font-size: 11.5px;
  color: var(--good); background: rgba(52, 211, 153, .12);
  border: 1px solid rgba(52, 211, 153, .3); border-radius: 999px; padding: 2px 8px;
}
.plist .footnote { margin-top: 14px; }

/* API card */
.api-card { padding: 30px 24px; background: var(--surface-2); }
.api-card p { color: var(--muted); max-width: 62ch; }
.api-card pre {
  background: var(--bg); border: 1px solid var(--border); border-radius: 10px;
  padding: 16px; overflow-x: auto; font-size: 13px; line-height: 1.6; margin: 18px 0 22px;
}
.api-card .cta-row { margin-bottom: 0; }

/* Trust */
.trust p { color: var(--muted); margin: 0; }

/* FAQ */
.faq details { border-bottom: 1px solid var(--border); }
.faq summary {
  cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center;
  gap: 12px; min-height: 44px; padding: 16px 4px;
  font-family: 'Chakra Petch', sans-serif; font-weight: 600; font-size: 16.5px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; color: var(--primary); font-size: 22px; flex: none; transition: transform .2s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { color: var(--muted); padding: 0 4px 18px; max-width: 68ch; }

/* Closer + footer */
.closer { text-align: center; padding-bottom: 88px; }
.footer {
  border-top: 1px solid var(--border);
  max-width: 1120px; margin: 0 auto; padding: 36px 20px 48px;
  display: flex; flex-direction: column; gap: 18px; align-items: flex-start;
}
.footer nav { display: flex; flex-wrap: wrap; gap: 4px 18px; }
.footer a { color: var(--muted); text-decoration: none; min-height: 44px; display: inline-flex; align-items: center; }
.footer a:hover { color: var(--fg); }
.fine { color: var(--muted); font-size: 13px; margin: 0; }

/* Reveal animation (motion-safe only) */
@media (prefers-reduced-motion: no-preference) {
  .reveal { opacity: 0; transform: translateY(14px); transition: opacity .28s ease-out, transform .28s ease-out; transition-delay: calc(var(--d, 0) * 55ms); }
  .reveal.in { opacity: 1; transform: none; }

  /* Hero sequence: ring draws (0.3–2.4s) → bolt ignites (2.15s) → glow blooms
     and orbit sparks fade in (≈2.6s), then orbits run forever. */
  .hero-ring {
    stroke-dasharray: 207.4; stroke-dashoffset: 207.4;
    animation: hero-ringdraw 2.1s cubic-bezier(.55, .06, .35, 1) .3s forwards;
  }
  @keyframes hero-ringdraw { to { stroke-dashoffset: 0; } }
  .hero-boltp { opacity: .35; animation: hero-ignite .7s ease-out 2.15s forwards; }
  @keyframes hero-ignite {
    0% { opacity: .35; filter: none; }
    60% { opacity: 1; filter: drop-shadow(0 0 26px rgba(245, 158, 11, .85)) brightness(1.35); }
    100% { opacity: 1; filter: drop-shadow(0 0 10px rgba(245, 158, 11, .4)); }
  }
  .hero-glow { opacity: 0; animation: hero-bloom 1.1s ease-out 2.5s forwards; }
  @keyframes hero-bloom { to { opacity: 1; } }
  .hero-orbits { opacity: 0; animation: hero-bloom .8s ease-out 2.7s forwards; }
  .orbit { transform-origin: 48px 48px; }
  .orbit-a { animation: hero-orb 7s linear infinite; }
  .orbit-b { animation: hero-orb 11s linear infinite reverse; }
  @keyframes hero-orb { to { transform: rotate(360deg); } }

  /* Bot journey: per-step progress bar fills over one autoplay slot. */
  .bj-step.on .bj-bar i { animation: bj-bar 3.6s linear forwards; }
  @keyframes bj-bar { to { width: 100%; } }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

/* ≥768px */
@media (min-width: 768px) {
  h2 { font-size: 34px; }
  .section { padding: 72px 24px; }
  .grid-2 { grid-template-columns: 1fr 1fr; }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .bj { grid-template-columns: 1fr 300px; align-items: center; gap: 44px; }
  .calc { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: start; }
  .calc .footnote { grid-column: 1 / -1; }
  .calc-outputs { margin-top: 0; }
  .hero {
    padding: 104px 24px 72px;
    display: grid; grid-template-columns: 1.25fr .75fr; gap: 24px; align-items: center;
  }
  .hero-stage { margin: 0; }
  .hero-mark { width: min(24vw, 230px); }
}

/* ≥1024px */
@media (min-width: 1024px) {
}

/* Mobile nav */
@media (max-width: 767px) {
  .nav {
    display: none;
    position: fixed; top: 64px; left: 0; right: 0;
    flex-direction: column; gap: 0; padding: 8px 12px 14px;
    background: rgba(15, 23, 42, .97); backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
  }
  .nav.open { display: flex; }
  .nav a { min-height: 48px; font-size: 17px; }
  .menu-btn { display: inline-flex; }
  .btn-header { margin-left: auto; }
  .menu-btn { margin-left: 0; }
}

/* Request access form */
.req-card { max-width: 560px; padding: 30px 26px; }
.req-sub { color: var(--muted); }
.req-label { display: block; font-weight: 600; font-size: 14.5px; margin: 18px 0 6px; }
.req-label small { color: var(--muted); font-weight: 400; }
.req-input {
  width: 100%; background: var(--bg); color: var(--fg);
  border: 1px solid var(--border); border-radius: 10px;
  padding: 12px 14px; font-size: 16px; font-family: inherit;
}
.req-input:focus-visible { outline: 2px solid var(--primary); outline-offset: 1px; border-color: transparent; }
textarea.req-input { resize: vertical; }
.req-hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
#reqBtn { margin-top: 20px; width: 100%; }
.req-msg { color: var(--destructive); font-size: 14px; margin: 10px 0 0; min-height: 20px; }
.req-done { font-size: 17px; color: var(--good); margin: 8px 0; }