/* ============================================================
   RANGELIGHT - Sources (the public proof behind "every answer cited")
   Homepage masthead + hex background + footer. Editorial left-align,
   blended transitions. D4 Signal & Smoke · Teal Law (count chips &
   links warm at rest, teal glow only on hover/focus).
   ============================================================ */
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--rl-smoke);color:var(--rl-bone);overflow-x:hidden}
.shell{max-width:1140px;margin:0 auto;padding:0 32px}
@media(max-width:600px){.shell{padding:0 22px}}
.skip-link{position:absolute;left:-9999px;top:0;z-index:100;background:var(--rl-amber);
  color:var(--rl-amber-ink);padding:10px 16px;border-radius:0 0 8px 0;
  font-family:var(--rl-font-display);font-weight:600}
.skip-link:focus{left:0}

/* ---- masthead ---- */
.site-header{position:sticky;top:0;z-index:40;background:rgba(14,13,12,.78);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--rl-line)}
.site-header__inner{display:flex;align-items:center;justify-content:space-between;height:68px;gap:18px}
.site-header__brand{display:flex;align-items:center;gap:14px;text-decoration:none}
.site-nav{display:flex;align-items:center;gap:24px}
.site-nav__link{background:none;border:0;cursor:pointer;padding:6px 2px;text-decoration:none;
  font-family:var(--rl-font-body);font-size:14.5px;color:var(--rl-dim);transition:color .3s var(--rl-ease)}
.site-nav__link:hover{color:var(--rl-bone)}
.site-header__right{display:flex;align-items:center;gap:14px}
@media(max-width:820px){.site-nav__link{display:none}}

/* shared reading column (header + body align to this exact left edge) */
.src-col{max-width:840px;margin:0 auto;padding:0 32px}
@media(max-width:600px){.src-col{padding:0 22px}}

/* ============================================================
   HERO - leads with the stat (editorial left)
   ============================================================ */
.src-hero{position:relative;overflow:hidden}
.src-hero__field{position:absolute;inset:0;z-index:0;overflow:hidden;opacity:.42}
.src-hero__water{position:absolute;inset:-12%;
  background:radial-gradient(42% 55% at 24% 28%, rgba(245,165,35,.15), transparent 60%),
    radial-gradient(46% 50% at 80% 64%, rgba(232,116,44,.13), transparent 62%),var(--rl-smoke);
  animation:src-water 38s var(--rl-ease-inout) infinite alternate;will-change:transform}
@keyframes src-water{0%{transform:translate3d(-2%,-1%,0) scale(1.05)}
  100%{transform:translate3d(2.5%,2%,0) scale(1.12)}}
canvas.rl-caustics{position:absolute;inset:0;width:100%;height:100%;display:block;mix-blend-mode:screen}
.src-hero__scrim{position:absolute;inset:0;z-index:1;pointer-events:none;
  background:linear-gradient(96deg, rgba(14,13,12,.8) 0%, rgba(14,13,12,.62) 46%, rgba(14,13,12,.34) 74%, rgba(14,13,12,.12) 100%),
    linear-gradient(180deg, rgba(14,13,12,.4) 0%, rgba(14,13,12,0) 30%)}
.src-hero__fade{position:absolute;left:0;right:0;bottom:0;height:42%;z-index:1;pointer-events:none;
  background:linear-gradient(180deg, rgba(14,13,12,0) 0%, rgba(14,13,12,.55) 55%, var(--rl-smoke) 100%)}
.src-hero__inner{position:relative;z-index:2;padding:92px 0 80px;text-align:left}
@media(max-width:600px){.src-hero__inner{padding:62px 0 54px}}
.src-eyebrow{font-family:var(--rl-font-mono);font-size:12px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--rl-amber);margin:0 0 18px}
.src-stat{font-family:var(--rl-font-display);font-weight:500;font-size:clamp(32px,4.8vw,52px);
  line-height:1.08;letter-spacing:-.015em;color:var(--rl-bone);margin:0;max-width:18ch;
  text-shadow:0 1px 18px rgba(14,13,12,.6)}
.src-stat .n{color:var(--rl-amber-soft);font-weight:600}
.src-sub{font-size:18.5px;line-height:1.6;color:var(--rl-dim);margin:22px 0 0;max-width:56ch;
  text-shadow:0 1px 12px rgba(14,13,12,.7)}
/* hero email capture */
.src-cta{margin:34px 0 0}
.src-cta .rl-capture{align-items:flex-start}
.src-cta__note{font-family:var(--rl-font-mono);font-size:12px;color:var(--rl-faint);margin:14px 2px 0}
/* honest note */
.src-note{display:flex;align-items:flex-start;gap:10px;margin:30px 0 0;padding:14px 16px;max-width:60ch;
  border:1px solid var(--rl-line-2);border-radius:10px;background:rgba(22,20,27,.45);
  font-size:13.5px;line-height:1.55;color:var(--rl-faint)}
.src-note svg{color:var(--rl-amber);flex:none;margin-top:1px}

/* reframed hero headline (integration-first) */
.src-headline{font-family:var(--rl-font-display);font-weight:500;font-size:clamp(30px,4.4vw,50px);
  line-height:1.08;letter-spacing:-.015em;color:var(--rl-bone);margin:0;max-width:20ch;
  text-shadow:0 1px 18px rgba(14,13,12,.6)}
/* the ONE aggregate stat - stated once, big; the only place a number belongs */
.src-aggregate{margin:30px 0 0;padding:20px 0 0;border-top:1px solid var(--rl-line);max-width:60ch}
.src-aggregate__line{font-family:var(--rl-font-display);font-weight:600;font-size:clamp(20px,2.7vw,30px);
  line-height:1.25;letter-spacing:-.01em;color:var(--rl-bone)}
.src-aggregate__line .n{color:var(--rl-amber-soft)}
.src-aggregate__line .sep{color:var(--rl-faint);font-weight:400;margin:0 5px}
/* reserved convergence-graphic slot - labeled empty; licensed image drops in later (no placeholder art) */
.src-convergence{margin:34px 0 0;aspect-ratio:5/2;display:flex;align-items:center;justify-content:center;
  text-align:center;border:1px dashed var(--rl-line-2);border-radius:16px;background:rgba(22,20,27,.42);
  position:relative;overflow:hidden}
.src-convergence::before{content:"";position:absolute;inset:0;
  background:radial-gradient(60% 80% at 50% 50%, rgba(111,196,210,.05), transparent 70%)}
.src-convergence__label{position:relative;font-family:var(--rl-font-mono);font-size:12px;letter-spacing:.05em;
  color:var(--rl-faint);max-width:44ch;line-height:1.55;padding:0 24px}

/* ============================================================
   SYNTHESIS IN ACTION - show the single-brain synthesis (real example)
   ============================================================ */
.syn{padding:48px 0 14px;position:relative}
.syn::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg, transparent 0%, var(--rl-line) 14%, var(--rl-line) 86%, transparent 100%)}
.syn__eyebrow{display:flex;align-items:center;gap:9px;font-family:var(--rl-font-mono);font-size:12px;
  letter-spacing:.16em;text-transform:uppercase;color:var(--rl-amber);margin:0 0 16px}
.syn__eyebrow .d{color:var(--rl-teal-lite);filter:drop-shadow(0 0 6px rgba(111,196,210,.6))}
.syn__title{font-family:var(--rl-font-display);font-weight:600;font-size:clamp(23px,3vw,32px);
  line-height:1.15;letter-spacing:-.01em;color:var(--rl-bone);margin:0 0 14px;max-width:22ch;text-wrap:pretty}
.syn__lead{font-size:17.5px;line-height:1.6;color:var(--rl-dim);margin:0 0 28px;max-width:62ch}
.syn__demo{border:1px solid var(--rl-line-2);border-radius:16px;background:var(--rl-smoke-2);overflow:hidden}
.syn__q{padding:20px 22px;border-bottom:1px solid var(--rl-line);background:rgba(255,255,255,.015)}
.syn__qrole{display:block;font-family:var(--rl-font-mono);font-size:11px;letter-spacing:.08em;
  text-transform:uppercase;color:var(--rl-faint);margin:0 0 8px}
.syn__q p{margin:0;font-size:16.5px;line-height:1.5;color:var(--rl-bone)}
.syn__a{padding:22px}
.syn__aby{display:flex;align-items:center;gap:9px;font-family:var(--rl-font-mono);font-size:12.5px;
  color:var(--rl-bone);margin:0 0 13px}
.syn__beacon{color:var(--rl-teal-lite);filter:drop-shadow(0 0 6px rgba(111,196,210,.6))}
.syn__tag{font-size:10px;letter-spacing:.06em;text-transform:uppercase;color:var(--rl-faint);
  border:1px solid var(--rl-line-2);border-radius:999px;padding:2px 9px}
.syn__alead{font-family:var(--rl-font-display);font-weight:600;font-size:19px;color:var(--rl-bone);margin:0 0 9px}
.syn__atext{font-size:15.5px;line-height:1.62;color:var(--rl-dim);margin:0 0 22px;max-width:66ch}
.syn__citelabel{display:block;font-family:var(--rl-font-mono);font-size:11px;letter-spacing:.07em;
  text-transform:uppercase;color:var(--rl-faint);margin:0 0 13px}
.syn__citerow{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
@media(max-width:720px){.syn__citerow{grid-template-columns:1fr}}
.syn__chip{display:flex;flex-direction:column;gap:6px;padding:14px 15px;text-decoration:none;
  background:var(--rl-smoke-3);border:1px solid var(--rl-line-2);border-radius:12px;
  transition:border-color var(--rl-transition),box-shadow var(--rl-transition),transform var(--rl-transition)}
.syn__chip:hover{border-color:rgba(111,196,210,.5);box-shadow:var(--rl-glow-teal-sm);transform:translateY(-1px)}
.syn__chiptop{display:flex;align-items:center;gap:7px}
.syn__chiptop .syn__d{color:var(--rl-amber);font-size:10px}
.syn__src{font-family:var(--rl-font-mono);font-size:10.5px;letter-spacing:.05em;text-transform:uppercase;color:var(--rl-faint)}
.syn__id{font-family:var(--rl-font-mono);font-size:14px;font-weight:600;color:var(--rl-amber-soft);letter-spacing:.01em}
.syn__desc{font-size:12.5px;line-height:1.5;color:var(--rl-dim)}
.syn__foot{font-size:15px;line-height:1.6;color:var(--rl-faint);margin:24px 0 0;max-width:62ch;font-style:italic}

/* ============================================================
   STICKY CATEGORY RAIL
   ============================================================ */
.src-rail{position:sticky;top:68px;z-index:30;background:rgba(14,13,12,.88);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--rl-line)}
.src-rail__inner{max-width:840px;margin:0 auto;padding:11px 32px;display:flex;gap:9px;
  overflow-x:auto;scrollbar-width:none}
.src-rail__inner::-webkit-scrollbar{display:none}
@media(max-width:600px){.src-rail__inner{padding:11px 22px}}
.src-chip{flex:none;display:inline-flex;align-items:center;gap:7px;cursor:pointer;
  background:none;border:1px solid var(--rl-line-2);border-radius:999px;padding:7px 14px;
  font-family:var(--rl-font-body);font-size:13px;color:var(--rl-dim);text-decoration:none;white-space:nowrap;
  transition:color var(--rl-transition),border-color var(--rl-transition),background var(--rl-transition)}
.src-chip:hover{color:var(--rl-bone);border-color:rgba(111,196,210,.5);box-shadow:var(--rl-glow-teal-sm)}
.src-chip__n{font-family:var(--rl-font-mono);font-size:11px;color:var(--rl-faint)}
.src-chip.is-active{color:var(--rl-amber-ink);background:var(--rl-grad-warm);border-color:transparent}
.src-chip.is-active .src-chip__n{color:var(--rl-amber-ink);opacity:.7}

/* ============================================================
   BODY - anchored category sections
   ============================================================ */
.src-body{padding:54px 0 30px}
.src-section{padding:34px 0;scroll-margin-top:124px}
.src-section + .src-section{position:relative}
.src-section + .src-section::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg, transparent 0%, var(--rl-line) 14%, var(--rl-line) 86%, transparent 100%)}
.src-sec__head{display:flex;align-items:baseline;gap:14px;margin:0 0 6px;flex-wrap:wrap}
.src-sec__num{font-family:var(--rl-font-mono);font-size:13px;color:var(--rl-amber);
  letter-spacing:.04em;flex:none}
.src-sec__title{font-family:var(--rl-font-display);font-weight:600;font-size:clamp(22px,2.8vw,28px);
  line-height:1.2;letter-spacing:-.01em;color:var(--rl-bone);margin:0}
.src-sec__desc{font-size:15px;line-height:1.55;color:var(--rl-dim);margin:0 0 22px;font-style:italic;max-width:60ch}
.src-sec__count{font-family:var(--rl-font-mono);font-size:11px;color:var(--rl-faint);
  letter-spacing:.04em;margin-left:auto;align-self:center}

@media (prefers-reduced-motion: reduce){.src-hero__water{animation:none}}

/* scroll reveal */
.reveal-ready .reveal{opacity:0;transform:translateY(14px);
  transition:opacity .6s var(--rl-ease),transform .6s var(--rl-ease)}
.reveal-ready .reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){.reveal-ready .reveal{opacity:1;transform:none;transition:none}}