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

:root {
  --bg: #0b0e12;
  --bg-deep: #02050a;
  --surface: rgba(16, 22, 29, 0.78);
  --surface2: #1a1f26;
  --border: rgba(198, 230, 224, 0.10);
  --border-hover: rgba(0, 209, 178, 0.34);
  --text: #f7f8f6;
  --muted: #9ba3a9;
  --subtle: #56616b;
  --accent: #00d1b2;
  --accent2: #52f2d8;
  --accent-dim: rgba(0, 209, 178, 0.11);
  --accent-glow: rgba(0, 209, 178, 0.30);
  --grid: rgba(115, 143, 154, 0.09);
}

html { scroll-behavior: smooth; }

body {
  min-height: 100vh;
  background:
    radial-gradient(circle at 18% 12%, rgba(0,209,178,0.12), transparent 24rem),
    radial-gradient(circle at 84% 8%, rgba(45,65,86,0.34), transparent 28rem),
    linear-gradient(145deg, #0b0e12 0%, #071019 45%, #02050a 100%);
  color: var(--text);
  font-family: 'Outfit', sans-serif;
  font-weight: 400;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

.dot-grid {
  position: fixed;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: linear-gradient(to bottom, black 0%, rgba(0,0,0,0.82) 48%, transparent 92%);
  pointer-events: none;
}

nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  border-bottom: 1px solid var(--border);
  background: rgba(2,5,10,0.78);
  backdrop-filter: blur(18px) saturate(135%);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.nav-logo-mark {
  width: 30px;
  height: 30px;
  display: block;
  object-fit: contain;
}

.nav-logo-text {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.nav-logo-text strong { color: var(--accent); font-weight: 600; }

.nav-right {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  font-size: 13px;
  color: var(--muted);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 6px;
  transition: color 0.15s, background 0.15s;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text);
  background: rgba(255,255,255,0.05);
}

.nav-cta {
  font-size: 13px;
  font-weight: 600;
  color: #000;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  padding: 7px 16px;
  border-radius: 7px;
  text-decoration: none;
  transition: opacity 0.15s, transform 0.15s;
  margin-left: 8px;
}

.nav-cta:hover { opacity: 0.85; transform: translateY(-1px); }

main {
  position: relative;
  z-index: 1;
  padding-top: 60px;
}

.page-hero {
  position: relative;
  overflow: hidden;
  padding: 104px 32px 72px;
  border-bottom: 1px solid var(--border);
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 60px 0 auto;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,209,178,0.45), transparent);
  opacity: 0.55;
}

.hero-inner,
.section-inner {
  max-width: 1060px;
  margin: 0 auto;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}

.eyebrow::before {
  content: '';
  display: block;
  width: 18px; height: 1px;
  background: var(--accent);
}

h1 {
  max-width: 820px;
  font-size: clamp(42px, 6vw, 82px);
  font-weight: 800;
  line-height: 1.02;
}

h2 {
  font-size: clamp(28px, 3.5vw, 44px);
  font-weight: 700;
  line-height: 1.08;
  margin-bottom: 12px;
}

h3 {
  font-size: 17px;
  font-weight: 650;
  line-height: 1.25;
}

.accent { color: var(--accent); }

.lead {
  max-width: 650px;
  margin-top: 22px;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.75;
}

.section {
  padding: 78px 32px;
  border-bottom: 1px solid var(--border);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: 44px;
  align-items: start;
}

.sub {
  max-width: 500px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
}

.grid-2,
.grid-3,
.folder-grid {
  display: grid;
  gap: 1px;
  border: 1px solid var(--border);
  background: var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.folder-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.card,
.folder-card,
.step-card,
.faq-card {
  background: rgba(6, 10, 16, 0.9);
  padding: 24px;
}

.card:hover,
.folder-card:hover,
.step-card:hover,
.faq-card:hover {
  background: linear-gradient(180deg, rgba(26,31,38,0.9), rgba(9,15,22,0.92));
}

.meta {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--subtle);
  margin-bottom: 8px;
}

.card p,
.folder-card p,
.step-card p,
.faq-card p {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
  margin-top: 8px;
}

.brand-card {
  min-height: 190px;
}

.brand-logo {
  height: 48px;
  max-width: 174px;
  object-fit: contain;
  object-position: left center;
  margin-bottom: 18px;
  background: #f7f8f6;
  border-radius: 7px;
  padding: 9px 12px;
}

.brand-logo.openai {
  max-width: 156px;
}

.count {
  display: inline-flex;
  margin-top: 14px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid rgba(0,209,178,0.18);
  border-radius: 6px;
  padding: 3px 8px;
}

.rail {
  border: 1px solid var(--border);
  border-radius: 8px;
  background:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px),
    rgba(7,12,18,0.82);
  background-size: 24px 24px;
  padding: 24px;
}

.rail-list {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.rail-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: rgba(8,14,21,0.86);
}

.rail-item span:first-child {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--accent);
}

.rail-item span:last-child {
  color: var(--muted);
  font-size: 12px;
  text-align: right;
}

.callout {
  border: 1px solid rgba(0,209,178,0.2);
  background: linear-gradient(135deg, rgba(0,209,178,0.12), rgba(26,31,38,0.46));
  border-radius: 8px;
  padding: 22px;
}

.callout p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
  margin-top: 8px;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  border-radius: 8px;
  text-decoration: none;
  min-height: 42px;
  padding: 0 18px;
}

.btn-primary {
  font-weight: 650;
  color: #000;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
}

.btn-secondary {
  color: var(--muted);
  border: 1px solid var(--border);
  background: rgba(10,17,26,0.38);
}

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

.timeline {
  display: grid;
  gap: 1px;
  border: 1px solid var(--border);
  background: var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.step-card {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 22px;
}

.step-number {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--accent);
}

.code-panel {
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(2,5,10,0.9);
  padding: 18px;
}

pre {
  font-family: 'IBM Plex Mono', monospace;
  color: #d8fff8;
  font-size: 12px;
  line-height: 1.8;
  white-space: pre-wrap;
}

footer {
  position: relative;
  z-index: 1;
  padding: 24px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
}

.fl-logo { font-size: 13px; font-weight: 600; color: var(--muted); text-decoration: none; }
.fl-links { display: flex; gap: 20px; flex-wrap: wrap; }
.fl-link {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px; color: var(--subtle);
  text-decoration: none; letter-spacing: 0.04em;
  transition: color 0.15s;
}
.fl-link:hover { color: var(--muted); }
.fl-copy { font-family: 'IBM Plex Mono', monospace; font-size: 11px; color: var(--subtle); }

@media (prefers-reduced-motion: reduce) {
  .reveal { transition: none; }
}

/* ── MOBILE NAV ── */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  padding: 6px 4px;
  background: none;
  border: none;
  cursor: pointer;
  margin-left: 8px;
}

.nav-hamburger span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--muted);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-hamburger[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-hamburger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-hamburger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

.nav-mobile {
  display: none;
  position: fixed;
  top: 60px;
  left: 0; right: 0;
  z-index: 99;
  background: rgba(2, 5, 10, 0.97);
  backdrop-filter: blur(18px) saturate(135%);
  border-bottom: 1px solid var(--border);
  padding: 12px 18px 20px;
  flex-direction: column;
  gap: 2px;
}

.nav-mobile.open { display: flex; }

.nav-mobile-link {
  font-size: 14px;
  color: var(--muted);
  text-decoration: none;
  padding: 11px 12px;
  border-radius: 6px;
  transition: color 0.15s, background 0.15s;
}

.nav-mobile-link:hover { color: var(--text); background: rgba(255,255,255,0.05); }

.nav-mobile-cta {
  display: block;
  margin-top: 10px;
  text-align: center;
  font-size: 14px;
  font-weight: 600;
  color: #000;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  padding: 12px;
  border-radius: 8px;
  text-decoration: none;
  transition: opacity 0.15s;
}

.nav-mobile-cta:hover { opacity: 0.85; }

@media (max-width: 640px) {
  .nav-hamburger { display: flex; }
}

@media (max-width: 900px) {
  .split,
  .grid-2,
  .grid-3,
  .folder-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  nav { padding: 0 18px; }
  .nav-link { display: none; }
  .nav-logo-text { font-size: 13px; }
  .nav-cta { padding: 7px 12px; }
  .page-hero { padding: 84px 20px 56px; }
  .section { padding: 58px 20px; }
  .step-card { grid-template-columns: 1fr; gap: 8px; }
  footer { flex-direction: column; align-items: flex-start; padding: 20px; }
}