/* Nowill — The Sky Harbor · golden-blue hour, brass & canvas · Prata + Karla + Space Mono */
:root{
  --slate:#2a3548;
  --slate-2:#1f2838;
  --slate-deep:#161d2b;
  --gold:#d9a86c;
  --gold-hi:#ecc189;
  --canvas:#e6ddc8;
  --mute:#93a0b5;
  --teal:#0fb5ba;
  --display:'Prata', serif;
  --body:'Karla', system-ui, sans-serif;
  --mono:'Space Mono', monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:auto}
body{
  background:var(--slate-deep);
  color:var(--canvas);
  font-family:var(--body);
  font-weight:300;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
::selection{background:var(--gold);color:var(--slate-deep)}

/* ---------- header ---------- */
.site-head{
  position:fixed;inset:0 0 auto 0;z-index:40;
  display:flex;align-items:center;gap:2rem;
  padding:1.1rem clamp(1.2rem,4vw,3rem);
}
.mark{display:flex;align-items:center;gap:.7rem;color:var(--canvas);text-decoration:none}
.mark svg{color:var(--gold)}
.mark span{font-family:var(--mono);font-size:.78rem;letter-spacing:.42em}
.head-nav{margin-left:auto;display:flex;gap:1.6rem}
.head-nav a{color:var(--mute);text-decoration:none;font-size:.82rem;letter-spacing:.14em;text-transform:uppercase;transition:color .3s}
.head-nav a:hover{color:var(--canvas)}
.head-cta{
  font-family:var(--mono);font-size:.78rem;letter-spacing:.2em;text-transform:uppercase;
  color:var(--slate-deep);background:var(--gold);text-decoration:none;
  padding:.55rem 1.2rem;border-radius:3px;transition:background .3s;
}
.head-cta:hover{background:var(--gold-hi)}

/* ---------- right rail HUD (altimeter) ---------- */
.rail{
  position:fixed;right:clamp(.8rem,2vw,1.6rem);top:50%;transform:translateY(-50%);
  z-index:30;display:flex;flex-direction:column;align-items:center;gap:.8rem;
  font-family:var(--mono);font-size:.6rem;color:var(--mute);letter-spacing:.1em;
}
.rail-dial{border:1px solid rgba(217,168,108,.4);border-radius:4px;padding:.5rem .55rem;color:var(--gold)}
.rail-track{width:1px;height:110px;background:rgba(230,221,200,.16);position:relative}
.rail-fill{position:absolute;top:0;left:0;width:100%;height:0%;background:var(--teal)}
.rail-count{color:var(--canvas)}

/* ---------- three canvas + grain ---------- */
#fx{position:fixed;inset:0;z-index:3;pointer-events:none}
.grain{
  position:fixed;inset:-60px;z-index:50;pointer-events:none;opacity:.45;
  background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 260 260' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.72' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3CfeComponentTransfer%3E%3CfeFuncA type='linear' slope='0.055'/%3E%3C/feComponentTransfer%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation:grain 900ms steps(4) infinite;
}
@keyframes grain{
  0%{transform:translate(0,0)}25%{transform:translate(-18px,10px)}
  50%{transform:translate(12px,-16px)}75%{transform:translate(-8px,-8px)}100%{transform:translate(14px,12px)}
}

/* ---------- chapters ---------- */
.chapter{height:230vh;position:relative}
.stage{position:sticky;top:0;height:100svh;overflow:hidden;display:grid;place-items:center}
.plate{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
  transform:scale(1.1);filter:blur(12px) brightness(.6);
  will-change:transform,filter;
}
.shade{
  position:absolute;inset:0;
  background:
    radial-gradient(120% 90% at 50% 25%, transparent 42%, rgba(22,29,43,.58) 100%),
    linear-gradient(180deg, rgba(22,29,43,.5) 0%, transparent 26%, transparent 62%, rgba(22,29,43,.76) 100%);
}
.copy{position:relative;z-index:5;width:min(1120px,92vw);padding:0 clamp(1rem,3vw,2rem)}
.kicker{
  font-family:var(--mono);font-size:.7rem;letter-spacing:.44em;text-transform:uppercase;
  color:var(--teal);margin-bottom:1.2rem;
}
h1,h2{font-family:var(--display);font-weight:400;line-height:1.08;letter-spacing:0}
h1{font-size:clamp(2.6rem,7.4vw,6.2rem);color:var(--canvas)}
h2{font-size:clamp(2rem,5vw,4rem);color:var(--canvas)}
h1 .ln,h2 .ln{display:inline-block}
h1 .ln:last-child{color:var(--gold-hi)}
.sub,.chapter-sub{
  margin-top:1.4rem;max-width:34em;font-size:clamp(.98rem,1.35vw,1.15rem);
  line-height:1.68;color:rgba(230,221,200,.85);
}
.hero-copy{text-align:center;display:flex;flex-direction:column;align-items:center}
.cta-row{display:flex;gap:1rem;margin-top:2.2rem;flex-wrap:wrap}
.hero-copy .cta-row{justify-content:center}
.btn{
  font-family:var(--mono);font-size:.8rem;letter-spacing:.16em;text-transform:uppercase;
  background:var(--gold);color:var(--slate-deep);text-decoration:none;
  padding:.95rem 1.7rem;border-radius:3px;border:1px solid var(--gold);
  transition:background .3s,color .3s,border-color .3s;
}
.btn:hover{background:var(--gold-hi);border-color:var(--gold-hi)}
.btn.ghost{background:transparent;color:var(--canvas);border-color:rgba(230,221,200,.4)}
.btn.ghost:hover{border-color:var(--teal);color:var(--teal);background:transparent}
.scroll-cue{
  position:absolute;bottom:2rem;left:50%;transform:translateX(-50%);z-index:6;
  font-family:var(--mono);font-size:.62rem;letter-spacing:.4em;text-transform:uppercase;color:var(--mute);
  display:flex;flex-direction:column;align-items:center;gap:.6rem;
}
.cue-line{width:1px;height:44px;background:linear-gradient(180deg,var(--gold),transparent);animation:cue 2.2s ease-in-out infinite}
@keyframes cue{0%,100%{transform:scaleY(.4);transform-origin:top}50%{transform:scaleY(1);transform-origin:top}}

/* ---------- cards: riveted brass panels ---------- */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:1rem;margin-top:2.4rem;max-width:980px}
.card{
  position:relative;padding:1.5rem 1.4rem 1.4rem;border-radius:6px;
  background:linear-gradient(160deg, rgba(42,53,72,.78), rgba(22,29,43,.6));
  border:1px solid rgba(217,168,108,.3);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  transition:border-color .35s, transform .35s;
}
.card::before,.card::after{
  content:"";position:absolute;top:.55rem;width:4px;height:4px;border-radius:50%;
  background:rgba(217,168,108,.55);
}
.card::before{left:.55rem}
.card::after{right:.55rem}
.card:hover{border-color:var(--teal);transform:translateY(-4px)}
.card i{font-family:var(--mono);font-style:normal;font-size:.66rem;letter-spacing:.3em;color:var(--gold)}
.card h3{font-family:var(--display);font-weight:400;font-size:1.16rem;margin:.7rem 0 .55rem;color:var(--canvas)}
.card p{font-size:.9rem;line-height:1.6;color:rgba(230,221,200,.75)}

/* ---------- strips ---------- */
.strip{
  position:relative;z-index:5;background:var(--slate-2);
  padding:clamp(4.5rem,10vh,8rem) clamp(1.2rem,6vw,4rem);
  border-top:1px solid rgba(217,168,108,.18);border-bottom:1px solid rgba(217,168,108,.18);
}
.strip-lead{
  font-family:var(--display);font-size:clamp(1.3rem,2.5vw,2rem);line-height:1.5;
  max-width:31em;color:rgba(230,221,200,.92);
}
.strip-lead em{font-style:normal;color:var(--gold-hi)}
.index{
  list-style:none;margin-top:3rem;display:grid;
  grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:.4rem 2rem;
}
.index a{
  display:flex;align-items:baseline;gap:.9rem;text-decoration:none;color:rgba(230,221,200,.8);
  padding:.55rem 0;border-bottom:1px solid rgba(230,221,200,.12);transition:color .3s,border-color .3s;
}
.index a:hover{color:var(--gold-hi);border-color:var(--gold)}
.index i{font-family:var(--mono);font-style:normal;font-size:.64rem;letter-spacing:.2em;color:var(--teal)}
.method{list-style:none;margin-top:2.6rem;display:grid;gap:1rem;max-width:44em}
.method li{font-size:1rem;line-height:1.6;color:rgba(230,221,200,.78);padding-left:1.5rem;position:relative}
.method li::before{content:"";position:absolute;left:0;top:.6em;width:.5em;height:.5em;border-radius:50%;border:1px solid var(--gold);background:transparent}
.method b{color:var(--canvas);font-weight:700}

/* ---------- footer ---------- */
.site-foot{
  position:relative;z-index:5;display:flex;flex-wrap:wrap;gap:1rem;justify-content:space-between;
  padding:2.2rem clamp(1.2rem,4vw,3rem);background:var(--slate-deep);
  font-family:var(--mono);font-size:.66rem;letter-spacing:.14em;color:var(--mute);
  border-top:1px solid rgba(217,168,108,.18);
}
.site-foot a{color:var(--gold);text-decoration:none}

/* ---------- reveal states ---------- */
.kicker,.copy h2,.chapter-sub,.card,.cta-row{opacity:0;transform:translateY(26px)}
.hero-copy .kicker,.hero-copy h1 .ln,.hero-copy .sub,.hero-copy .cta-row{opacity:0;transform:translateY(30px)}

/* ---------- responsive ---------- */
@media (max-width:900px){
  .head-nav{display:none}
  .rail{display:none}
  .cards{grid-template-columns:1fr 1fr}
}
@media (max-width:600px){
  .cards{grid-template-columns:1fr}
  .chapter{height:200vh}
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce){
  #fx,.grain,.cue-line{display:none}
  .plate{transform:none;filter:none}
  .kicker,.copy h2,.chapter-sub,.card,.cta-row,
  .hero-copy .kicker,.hero-copy h1 .ln,.hero-copy .sub,.hero-copy .cta-row{opacity:1;transform:none}
  .chapter{height:auto}
  .stage{position:relative;height:100svh}
}