/* Kestrel Iota — shared chrome for the secondary pages.
   Tokens, typography, and components are taken from the live site
   (index.html / book.html) so every page reads as one design system. */

:root{
  --bg:#08090d;
  --bg2:#0c0e14;
  --fg:#e8eaf0;
  --fg-dim:rgba(232,234,240,0.45);
  --fg-muted:rgba(232,234,240,0.22);
  --accent:#5ce1e6;
  --accent2:#3b82f6;
  --accent-warm:#f59e0b;
  --gutter:clamp(20px, 4vw, 80px);
  --col:min(1200px, calc(100vw - var(--gutter) * 2));
}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--fg);font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  overflow-x:hidden;-webkit-font-smoothing:antialiased;min-height:100vh;line-height:1.6}
::selection{background:rgba(92,225,230,0.25);color:#fff}
a{color:inherit;text-decoration:none}

/* Film-grain overlay — the texture that keeps the dark from going flat */
body::after{
  content:'';position:fixed;inset:0;z-index:9000;pointer-events:none;opacity:0.035;
  background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-repeat:repeat;background-size:180px;
}

/* ═══ NAV ═══ */
.nav-bar{
  position:fixed;top:0;left:0;right:0;z-index:10000;
  padding:0 var(--gutter);height:72px;
  display:flex;align-items:center;justify-content:space-between;
  background:rgba(8,9,13,0.85);backdrop-filter:blur(24px) saturate(1.3);
  border-bottom:1px solid rgba(92,225,230,0.06);
}
.logo{font-family:'Instrument Serif',Georgia,serif;font-size:1.6rem;color:var(--fg);display:flex;align-items:center;gap:6px}
.logo i{color:var(--accent);font-style:italic}
.logo img{height:2.2em;width:auto;vertical-align:bottom;position:relative;top:-6px;margin-right:4px}
.nav-links{display:flex;gap:40px;align-items:center;list-style:none}
.nav-links a{font-size:0.78rem;font-weight:400;letter-spacing:0.06em;text-transform:uppercase;
  color:var(--fg-dim);transition:color 0.3s}
.nav-links a:hover{color:var(--fg)}
.nav-links a[aria-current="page"]{color:var(--accent)}
.nav-cta-btn{font-size:0.78rem;font-weight:500;letter-spacing:0.06em;text-transform:uppercase;
  color:var(--bg);background:var(--accent);padding:10px 24px;border-radius:100px;display:inline-block}
.menu-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;
  padding:8px;position:relative;z-index:9999}
.menu-toggle span{display:block;width:24px;height:1.5px;background:var(--fg);transition:transform .3s,opacity .3s}
.menu-toggle.active span:nth-child(1){transform:rotate(45deg) translate(4px,4px)}
.menu-toggle.active span:nth-child(2){opacity:0}
.menu-toggle.active span:nth-child(3){transform:rotate(-45deg) translate(4px,-4px)}
.mobile-nav{position:fixed;inset:0;z-index:9998;background:rgba(8,9,13,0.98);backdrop-filter:blur(20px);
  display:flex;flex-direction:column;justify-content:center;align-items:center;gap:28px;
  opacity:0;pointer-events:none;transition:opacity .35s}
.mobile-nav.active{opacity:1;pointer-events:auto}
.mobile-nav a{font-size:1.4rem;font-family:'Instrument Serif',Georgia,serif;color:var(--fg)}

/* ═══ BUTTONS ═══ */
.btn{display:inline-flex;align-items:center;gap:10px;padding:15px 32px;border-radius:100px;
  font-size:0.9rem;font-weight:500;transition:transform .25s,box-shadow .25s,background .25s,color .25s}
.btn-fill{background:var(--accent);color:var(--bg)}
.btn-fill:hover{transform:translateY(-2px);box-shadow:0 12px 34px rgba(92,225,230,0.28)}
.btn-line{border:1px solid rgba(92,225,230,0.28);color:var(--fg);
  background:linear-gradient(180deg,rgba(92,225,230,0.06),transparent)}
.btn-line:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
.btn-sm{padding:11px 22px;font-size:0.82rem}
.cta-row{display:flex;gap:16px;flex-wrap:wrap}

/* ═══ PAGE HEADER ═══ */
.page-head{padding:calc(72px + clamp(70px,10vh,130px)) var(--gutter) 48px;
  max-width:calc(var(--col) + var(--gutter) * 2);margin:0 auto;position:relative}
.page-head::before{
  content:'';position:absolute;top:-140px;left:-10%;width:70%;height:520px;pointer-events:none;
  background:radial-gradient(ellipse at 30% 40%,rgba(92,225,230,0.10),transparent 65%);
  filter:blur(30px);z-index:-1;
}
.section-tag{display:flex;align-items:center;gap:14px;font-size:0.72rem;font-weight:500;
  letter-spacing:0.18em;text-transform:uppercase;color:var(--accent);margin-bottom:26px}
.section-tag::before{content:'';width:38px;height:1px;background:var(--accent);opacity:0.7}
h1{font-family:'Instrument Serif',Georgia,serif;font-weight:400;
  font-size:clamp(2.6rem,6vw,4.4rem);line-height:1.06;letter-spacing:-0.01em;margin-bottom:24px}
h1 em{font-style:italic;color:var(--accent)}
.sub{color:var(--fg-dim);max-width:62ch;font-size:1.05rem;line-height:1.75}

/* ═══ PROSE ═══ */
.prose{padding:8px var(--gutter) 96px;max-width:calc(min(860px, 100vw - var(--gutter)*2) + var(--gutter)*2);
  margin:0 auto}
.prose h2{font-family:'Instrument Serif',Georgia,serif;font-weight:400;
  font-size:clamp(1.7rem,3.2vw,2.4rem);line-height:1.15;margin:52px 0 16px}
.prose h2 em{font-style:italic;color:var(--accent)}
.prose h3{font-size:1.02rem;font-weight:600;margin:30px 0 8px;color:var(--fg)}
.prose p,.prose li{color:var(--fg-dim);margin-bottom:14px;line-height:1.8}
.prose ul,.prose ol{margin:0 0 20px 22px}
.prose li{margin-bottom:10px}
.prose strong{color:var(--fg);font-weight:600}
/* Inline links are accent — but never buttons, whose own colour rules are less
   specific than `.prose a` and would otherwise be overridden. */
.prose a:not(.btn){color:var(--accent);border-bottom:1px solid rgba(92,225,230,0.25)}
.prose a:not(.btn):hover{border-bottom-color:var(--accent)}
.prose .updated{font-size:0.85rem;color:var(--fg-muted);font-style:italic}
.prose table{width:100%;border-collapse:collapse;margin:0 0 24px;font-size:0.9rem}
.prose th,.prose td{border-bottom:1px solid rgba(232,234,240,0.08);padding:13px 14px;text-align:left;
  vertical-align:top}
.prose th{color:var(--fg);font-weight:600;font-size:0.74rem;letter-spacing:0.1em;text-transform:uppercase}
.prose td{color:var(--fg-dim)}

/* ═══ NUMBERED LIST — the live site's hairline pattern, not boxes ═══ */
.num-list{margin:34px 0 0;list-style:none}
.num-list li{display:grid;grid-template-columns:64px 1fr;gap:8px 20px;
  padding:24px 0;border-top:1px solid rgba(232,234,240,0.07);margin:0}
.num-list li:last-child{border-bottom:1px solid rgba(232,234,240,0.07)}
.num-list .n{font-family:'Instrument Serif',Georgia,serif;font-size:1.5rem;color:var(--accent);opacity:0.55}
.num-list h3{margin:0 0 6px;font-size:1rem}
.num-list p{margin:0;font-size:0.92rem}

/* ═══ STATS — serif numerals with divider rules ═══ */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));margin:44px 0;
  border-top:1px solid rgba(232,234,240,0.07);border-bottom:1px solid rgba(232,234,240,0.07)}
.stat{padding:34px 20px;text-align:center;border-right:1px solid rgba(232,234,240,0.07)}
.stat:last-child{border-right:none}
.stat b{display:block;font-family:'Instrument Serif',Georgia,serif;font-weight:400;
  font-size:3rem;line-height:1;color:var(--fg);margin-bottom:12px}
.stat b span{color:var(--accent)}
.stat em{display:block;font-style:normal;font-size:0.7rem;letter-spacing:0.12em;
  text-transform:uppercase;color:var(--fg-dim)}

/* ═══ CARDS — used sparingly ═══ */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));gap:18px;margin:34px 0 10px}
.card{background:linear-gradient(160deg,rgba(255,255,255,0.026),transparent);
  border:1px solid rgba(232,234,240,0.07);border-radius:16px;padding:28px 30px;
  transition:border-color .3s,transform .3s}
.card:hover{border-color:rgba(92,225,230,0.24);transform:translateY(-3px)}
.card .n{font-family:'Instrument Serif',Georgia,serif;font-size:1.3rem;color:var(--accent);opacity:0.6}
.card h3{margin:8px 0 10px;font-size:1.05rem}
.card p{color:var(--fg-dim);font-size:0.92rem;margin:0;line-height:1.7}

/* ═══ CONTACT ═══ */
.contact-grid{display:grid;grid-template-columns:1.15fr 1fr;gap:56px;align-items:start;
  padding:8px var(--gutter) 96px;max-width:calc(var(--col) + var(--gutter)*2);margin:0 auto}
.contact-grid .prose{padding:0;max-width:none}
@media(max-width:860px){.contact-grid{grid-template-columns:1fr;gap:34px}}

/* ═══ FOOTER ═══ */
footer{border-top:1px solid rgba(232,234,240,0.07);padding:70px var(--gutter) 44px;
  max-width:calc(var(--col) + var(--gutter)*2);margin:0 auto}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:48px}
.foot-grid h4{font-size:0.72rem;letter-spacing:0.16em;text-transform:uppercase;
  color:var(--fg-dim);margin-bottom:18px;font-weight:500}
.foot-grid p{color:var(--fg-dim);font-size:0.87rem;max-width:34ch;margin-top:14px;line-height:1.75}
.foot-grid ul{list-style:none}
.foot-grid li{margin-bottom:11px}
.foot-grid li a,.foot-grid > div > a{color:var(--fg-dim);font-size:0.87rem;transition:color .25s}
.foot-grid li a:hover{color:var(--accent)}
.foot-bottom{border-top:1px solid rgba(232,234,240,0.07);padding-top:26px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:0.8rem;color:var(--fg-muted)}
.foot-bottom a:hover{color:var(--accent)}

/* ═══ FLOATING CTA ═══ */
.floating-cta{position:fixed;bottom:28px;right:28px;z-index:8000;
  background:var(--accent);color:var(--bg);padding:14px 26px;border-radius:100px;
  font-size:0.84rem;font-weight:500;box-shadow:0 14px 40px rgba(92,225,230,0.3);
  transition:transform .25s}
.floating-cta:hover{transform:translateY(-3px)}

@media(max-width:820px){
  .nav-links{display:none}
  .menu-toggle{display:flex}
  .foot-grid{grid-template-columns:1fr 1fr;gap:30px}
  .floating-cta{bottom:18px;right:18px;padding:12px 20px;font-size:0.78rem}
  .stat{border-right:none;border-bottom:1px solid rgba(232,234,240,0.07)}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .btn,.card,.floating-cta{transition:none}
}