/* Roadmap Signal — site styles */
:root {
  --signal-blue: #1E40FF;
  --signal-blue-ink: #1330C9;
  --signal-blue-tint: #EEF1FF;
  --ink: #0B1220;
  --ink-2: #2A2F3A;
  --ink-3: #555B68;
  --ink-4: #8A8F9C;
  --rule: #E4E2DC;
  --rule-2: #D8D5CD;
  --paper: #FAFAF7;
  --paper-2: #F4F2EC;
  --paper-3: #ECE9E1;
  --warn: #B45309;
  --maxw: 1200px;
  --prose: 720px;
  --gap: 24px;
  --section: 120px;
  --radius: 4px;
  --mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: "Inter", "Inter Placeholder", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  background: var(--paper);
  color: var(--ink);
  font-feature-settings: "ss01", "cv11", "tnum" 0;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-size: 16px;
  line-height: 1.55;
}

a { color: inherit; text-decoration: none; }
a.link {
  color: var(--signal-blue);
  border-bottom: 1px solid color-mix(in srgb, var(--signal-blue) 30%, transparent);
  transition: border-color .15s ease;
}
a.link:hover { border-bottom-color: var(--signal-blue); }

img { max-width: 100%; display: block; }
hr { border: 0; border-top: 1px solid var(--rule); margin: 0; }

/* Layout primitives */
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 32px; }
.prose { max-width: var(--prose); }
.stack-xs > * + * { margin-top: 6px; }
.stack-sm > * + * { margin-top: 12px; }
.stack > * + * { margin-top: 20px; }
.stack-lg > * + * { margin-top: 32px; }

/* Type scale */
.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.eyebrow.blue { color: var(--signal-blue); }

h1, h2, h3, h4 { font-weight: 500; letter-spacing: -0.022em; margin: 0; color: var(--ink); }
h1 { font-size: clamp(40px, 5.5vw, 72px); line-height: 1.02; letter-spacing: -0.03em; font-weight: 480; }
h2 { font-size: clamp(28px, 3.4vw, 44px); line-height: 1.08; letter-spacing: -0.025em; font-weight: 480; }
h3 { font-size: 22px; line-height: 1.2; }
h4 { font-size: 15px; line-height: 1.3; font-weight: 500; }

p { margin: 0; color: var(--ink-2); }
p.lead { font-size: 19px; line-height: 1.55; color: var(--ink-2); max-width: 56ch; }
p.small { font-size: 14px; color: var(--ink-3); }
.mono { font-family: var(--mono); }
.tabular { font-variant-numeric: tabular-nums; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--rule);
}
.site-header .row {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 500; letter-spacing: -0.01em; }
.brand-mark {
  width: 22px; height: 22px;
  display: grid; place-items: center;
  position: relative;
}
.brand-mark svg { width: 22px; height: 22px; }
.brand-name { font-size: 15px; color: var(--signal-blue); }
.nav { display: flex; gap: 28px; align-items: center; }
.nav a {
  font-size: 14px; color: var(--ink-2);
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 0;
}
.nav a:hover { color: var(--ink); }
.nav a.btn-primary { color: #fff; padding: 10px 16px; }
.nav a.btn-primary:hover { color: #fff; }
.nav .has-menu { position: relative; }
.nav .has-menu > .menu {
  position: absolute; top: 100%; left: -16px;
  background: var(--paper);
  border: 1px solid var(--rule);
  padding: 12px;
  min-width: 280px;
  opacity: 0; pointer-events: none;
  transform: translateY(4px);
  transition: opacity .15s, transform .15s;
  display: grid; gap: 4px;
}
.nav .has-menu:hover > .menu,
.nav .has-menu:focus-within > .menu { opacity: 1; pointer-events: auto; transform: translateY(0); }
.menu a { display: grid; grid-template-columns: 1fr; padding: 8px 10px; }
.menu a:hover { background: var(--paper-2); }
.menu a .ml { font-size: 13.5px; color: var(--ink); }
.menu a .ms { font-size: 12px; color: var(--ink-4); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--sans);
  font-size: 14px; font-weight: 500;
  padding: 10px 16px;
  border-radius: 2px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background .15s, color .15s, border-color .15s;
  line-height: 1;
  white-space: nowrap;
}
.btn-primary {
  background: var(--signal-blue); color: #fff;
}
.btn-primary:hover { background: var(--signal-blue-ink); }
.btn-ghost {
  background: transparent; color: var(--ink); border-color: var(--rule-2);
}
.btn-ghost:hover { border-color: var(--ink); }
.btn-text {
  background: transparent; color: var(--ink); padding-left: 0; padding-right: 0;
}
.btn-text:hover { color: var(--signal-blue); }
.btn-lg { padding: 14px 22px; font-size: 15px; }

/* Hero */
.hero { padding: clamp(48px, 8vw, 96px) 0 clamp(56px, 8vw, 96px); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: 80px; align-items: center; }
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
}
.hero h1 { margin-bottom: 24px; }
.hero h1 .accent { color: var(--signal-blue); }
.hero .ctas { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; margin-top: 32px; }
.hero .scarcity {
  display: flex; align-items: center; gap: 10px;
  margin-top: 28px;
  padding: 12px 14px;
  border: 1px solid var(--rule-2);
  font-size: 13px; color: var(--ink-2);
  background: var(--paper);
  width: fit-content;
}
.hero .scarcity .dot { width: 6px; height: 6px; background: var(--signal-blue); border-radius: 999px; }

/* Hero diagram */
.hero-diagram { aspect-ratio: 5/4; width: 100%; max-width: 560px; margin-left: auto; }

/* Sections */
section.bk { padding: var(--section) 0; }
section.bk + section.bk { border-top: 1px solid var(--rule); }
.section-header { display: grid; grid-template-columns: 220px 1fr; gap: 64px; margin-bottom: 56px; align-items: start; }
@media (max-width: 800px) { .section-header { grid-template-columns: 1fr; gap: 16px; } }
.section-header .ix { display: flex; flex-direction: column; gap: 10px; }
.section-header .num {
  font-family: var(--mono); font-size: 12px; color: var(--ink-4); letter-spacing: .1em;
}
.section-header h2 { max-width: 22ch; }

/* Three-up cards */
.cards-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--rule); border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
@media (max-width: 900px) { .cards-3 { grid-template-columns: 1fr; } }
.cap-card {
  background: var(--paper);
  padding: 36px 32px 32px;
  display: flex; flex-direction: column; gap: 14px; min-height: 320px;
  text-decoration: none; color: inherit;
  transition: background .15s;
  position: relative;
}
.cap-card:hover { background: var(--paper-2); }
.cap-card .num { font-family: var(--mono); font-size: 12px; color: var(--signal-blue); letter-spacing: 0.06em; }
.cap-card h3 { font-size: 22px; }
.cap-card p { font-size: 14.5px; color: var(--ink-2); line-height: 1.55; }
.cap-card .arrow { margin-top: auto; color: var(--signal-blue); display: inline-flex; align-items: center; gap: 6px; font-size: 13px; }

/* Two-column problem section */
.problems { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; }
@media (max-width: 900px) { .problems { grid-template-columns: 1fr; } }
.problem h3 { font-size: 19px; margin-bottom: 12px; line-height: 1.25; }
.problem .ic { width: 28px; height: 28px; color: var(--signal-blue); margin-bottom: 18px; }
.problem p { font-size: 14.5px; color: var(--ink-2); line-height: 1.6; }

/* Inverse hero / dark band */
.band-dark {
  background: var(--ink);
  color: #ECE9E1;
}
.band-dark h2 { color: #fff; }
.band-dark p { color: #B7B9C0; }
.band-dark .eyebrow { color: #8A8F9C; }
.band-dark hr { border-top-color: rgba(255,255,255,0.12); }
.band-dark .rule { background: rgba(255,255,255,0.12); }
.band-dark .btn-ghost { border-color: rgba(255,255,255,0.18); color: #fff; }
.band-dark .btn-ghost:hover { border-color: #fff; }

/* Methodology trio */
.method-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
@media (max-width: 900px) { .method-grid { grid-template-columns: 1fr; } }
.method-card {
  border: 1px solid var(--rule);
  padding: 28px 24px;
  background: var(--paper);
  display: flex; flex-direction: column; gap: 10px;
}
.method-card .label { font-family: var(--mono); font-size: 11px; color: var(--signal-blue); letter-spacing: .14em; text-transform: uppercase; }
.method-card h4 { font-size: 18px; line-height: 1.25; margin-bottom: 4px; }
.method-card p { font-size: 14px; color: var(--ink-3); line-height: 1.55; }

/* Beta band */
.beta-band {
  border: 1px solid var(--ink);
  padding: 56px;
  display: grid; grid-template-columns: 1.5fr 1fr; gap: 48px; align-items: center;
  background: var(--paper);
}
@media (max-width: 800px) { .beta-band { grid-template-columns: 1fr; padding: 32px; } }
.beta-band h2 { font-size: 36px; }
.beta-band .count {
  font-family: var(--mono); font-size: 64px; line-height: 1; color: var(--signal-blue);
  font-feature-settings: "tnum"; letter-spacing: -0.04em;
}
.beta-band .count-label { font-size: 13px; color: var(--ink-3); }

/* Founder note */
.founder { display: grid; grid-template-columns: 280px 1fr; gap: 64px; align-items: start; }
@media (max-width: 800px) { .founder { grid-template-columns: 1fr; } }
.founder .portrait {
  aspect-ratio: 4/5; width: 100%;
  background:
    repeating-linear-gradient(135deg, var(--paper-3) 0 6px, var(--paper-2) 6px 12px);
  border: 1px solid var(--rule);
  display: flex; align-items: flex-end; padding: 16px;
  position: relative;
}
.founder .portrait .mono-tag {
  font-family: var(--mono); font-size: 11px; color: var(--ink-3);
  background: var(--paper); padding: 4px 8px; border: 1px solid var(--rule);
}
.founder .initials {
  position: absolute; top: 24px; left: 24px;
  font-family: var(--mono); font-size: 32px; color: var(--ink); letter-spacing: -0.02em;
}
.founder blockquote {
  margin: 0;
  font-size: clamp(20px, 2.2vw, 26px); line-height: 1.4;
  color: var(--ink); letter-spacing: -0.012em; font-weight: 420;
}
.founder cite { font-style: normal; display: block; font-size: 14px; color: var(--ink-3); margin-top: 24px; }
.founder .pedigree { margin-top: 8px; font-family: var(--mono); font-size: 11px; color: var(--ink-4); letter-spacing: 0.06em; }

/* FAQ */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 48px; }
@media (max-width: 800px) { .faq-list { grid-template-columns: 1fr; } }
.faq-item { border-top: 1px solid var(--rule); padding: 24px 0; }
.faq-item h4 { font-size: 16px; margin-bottom: 8px; }
.faq-item p { font-size: 14px; color: var(--ink-3); line-height: 1.6; }

/* Footer */
.site-footer { border-top: 1px solid var(--rule); padding: 64px 0 48px; background: var(--paper); }
.foot-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr; gap: 32px; }
@media (max-width: 900px) { .foot-grid { grid-template-columns: 1fr 1fr; } }
.foot-grid h5 { font-size: 12px; font-family: var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-4); margin: 0 0 14px; font-weight: 500; }
.foot-grid ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.foot-grid a { font-size: 14px; color: var(--ink-2); }
.foot-grid a:hover { color: var(--signal-blue); }
.foot-bottom { display: flex; justify-content: space-between; align-items: center; margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--rule); font-size: 12px; color: var(--ink-4); font-family: var(--mono); letter-spacing: 0.06em; }

/* Reveal — content is always visible; no animation gating */
[data-reveal] { opacity: 1; }

/* Misc */
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.06em;
  border: 1px solid var(--rule); padding: 6px 10px; background: var(--paper);
  color: var(--ink-2); text-transform: uppercase;
}
.tag.blue { border-color: color-mix(in srgb, var(--signal-blue) 35%, var(--rule)); color: var(--signal-blue); background: var(--signal-blue-tint); }

.kv { display: grid; grid-template-columns: 160px 1fr; gap: 16px; padding: 16px 0; border-top: 1px solid var(--rule); }
.kv:last-child { border-bottom: 1px solid var(--rule); }
.kv .k { font-family: var(--mono); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-4); padding-top: 2px; }
.kv .v { font-size: 14.5px; color: var(--ink-2); line-height: 1.55; }

/* "Not ready yet" stripe */
.placeholder {
  border: 1px solid var(--rule);
  background:
    repeating-linear-gradient(135deg, transparent 0 8px, color-mix(in srgb, var(--paper-3) 90%, transparent) 8px 9px);
  display: grid; place-items: center;
  font-family: var(--mono); font-size: 11px; color: var(--ink-4); letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 24px;
  min-height: 120px;
}

/* FAQ Accordion */
.faq-list { border-top: 1px solid var(--rule); }
.faq-item { border-bottom: 1px solid var(--rule); }
.faq-question {
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
  width: 100%; padding: 20px 0; cursor: pointer;
  background: none; border: none; text-align: left;
  font-family: var(--sans); font-size: 15px; font-weight: 500;
  color: var(--ink); letter-spacing: -0.01em;
}
.faq-question:hover { color: var(--signal-blue); }
.faq-question svg { transition: transform .2s ease; flex-shrink: 0; }
.faq-question[aria-expanded="true"] svg { transform: rotate(180deg); }
.faq-answer { padding: 0 0 20px; max-width: 68ch; }
.faq-answer[hidden] { display: none; }

/* Density tweak */
body[data-density="compact"] { --section: 88px; }
body[data-density="compact"] .hero { padding: 56px 0 56px; }

/* Tweaks toggles */
body[data-accent="indigo"] { --signal-blue: #4F46E5; --signal-blue-ink: #3730A3; --signal-blue-tint: #EEF2FF; }
body[data-accent="navy"] { --signal-blue: #1E3A8A; --signal-blue-ink: #172554; --signal-blue-tint: #EEF1FA; }
body[data-accent="electric"] { --signal-blue: #2563EB; --signal-blue-ink: #1D4ED8; --signal-blue-tint: #EFF4FE; }
body[data-accent="cobalt"] { --signal-blue: #1E40FF; --signal-blue-ink: #1330C9; --signal-blue-tint: #EEF1FF; }