:root{
  --navy:#000321; --navy-2:#060b2a; --ink:#f6f6ff; --muted:#a7b0cc; --dim:#565a7c;
  --blue:#2f6bff; --site-blue:#188bf6; --gold:#f2c14e; --sand:#d9b56a;
  --ease:cubic-bezier(.16,1,.3,1);
  --pad:clamp(16px,5vw,64px);
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{background:var(--navy);color:var(--ink)}
body{font-family:Inter,Roboto,system-ui,sans-serif;min-height:100svh;overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{color:inherit}
.display{font-family:Oswald,sans-serif;font-weight:700;letter-spacing:.01em;line-height:.95;text-transform:uppercase}
.serif{font-family:"Playfair Display",serif;font-style:italic}
.eyebrow{font-family:Oswald,sans-serif;font-weight:500;letter-spacing:.24em;text-transform:uppercase;font-size:12px;color:var(--gold)}

/* header */
.top{position:fixed;inset:0 0 auto 0;z-index:30;display:flex;align-items:center;gap:18px;padding:14px var(--pad);
  background:rgba(0,3,33,.86);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);box-shadow:0 1px 0 rgba(246,246,255,.06)}
.top .logo{height:46px;filter:invert(1);mix-blend-mode:screen;flex:none}
.chapters{display:flex;gap:4px;margin-left:auto;list-style:none}
.chapters a{display:block;text-decoration:none;font-family:Oswald,sans-serif;font-size:13px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted);padding:8px 12px;border-radius:3px;transition:color .3s var(--ease),background .3s var(--ease)}
.chapters a span{color:var(--dim);margin-right:6px}
.chapters a:hover{color:var(--ink)}
.chapters a[aria-current=page]{color:var(--navy);background:var(--gold)}
.chapters a[aria-current=page] span{color:rgba(0,3,33,.55)}
.sound{flex:none;border:1px solid rgba(246,246,255,.18);background:transparent;color:var(--ink);border-radius:999px;
  font:500 12px Inter,sans-serif;letter-spacing:.08em;padding:8px 14px;cursor:pointer;display:flex;align-items:center;gap:8px}
.sound i{width:8px;height:8px;border-radius:50%;background:var(--dim)}
.sound[aria-pressed=true] i{background:var(--gold);box-shadow:0 0 10px var(--gold)}
@media (max-width:760px){
  .chapters a{padding:7px 8px;font-size:11px;letter-spacing:.08em}
  .chapters a .lbl{display:none}
  .chapters a span{margin:0}
  .top .logo{height:36px}
}

/* caption bar for narration */
.caption{position:fixed;left:50%;bottom:clamp(14px,3vh,28px);transform:translate(-50%,12px);z-index:25;max-width:min(620px,calc(100vw - 32px));
  font-size:clamp(13px,1.1vw,16px);line-height:1.45;text-align:center;color:var(--ink);background:rgba(0,3,33,.72);
  backdrop-filter:blur(6px);padding:10px 18px;border-radius:4px;opacity:0;transition:opacity .5s var(--ease),transform .5s var(--ease);pointer-events:none}
.caption.on{opacity:1;transform:translate(-50%,0)}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:10px;text-decoration:none;border:0;cursor:pointer;font:600 16px Inter,sans-serif;
  padding:15px 24px;border-radius:4px;transition:transform .3s var(--ease),box-shadow .3s var(--ease),background .3s var(--ease)}
.btn svg{width:18px;height:18px}
.btn-gold{background:var(--gold);color:var(--navy)}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 12px 30px -10px rgba(242,193,78,.6)}
.btn-ghost{background:transparent;color:var(--ink);box-shadow:inset 0 0 0 1px rgba(246,246,255,.25)}
.btn-ghost:hover{box-shadow:inset 0 0 0 1px var(--gold);color:var(--gold)}

/* next-chapter footer */
.next{display:grid;grid-template-columns:1fr auto;align-items:end;gap:24px;padding:clamp(56px,10vh,110px) var(--pad) 28px;
  border-top:1px solid rgba(246,246,255,.08);text-decoration:none;position:relative}
.next .k{font-family:Oswald,sans-serif;letter-spacing:.24em;font-size:12px;color:var(--muted);text-transform:uppercase}
.next .t{font-family:Oswald,sans-serif;font-weight:700;text-transform:uppercase;font-size:clamp(44px,8vw,120px);line-height:.9;margin-top:10px;
  transition:color .4s var(--ease)}
.next:hover .t{color:var(--gold)}
.next .arrow{width:clamp(48px,6vw,84px);height:clamp(48px,6vw,84px);transition:transform .5s var(--ease)}
.next:hover .arrow{transform:translateX(10px)}
.foot{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;padding:18px var(--pad) 26px;font-size:12px;color:var(--dim)}
.foot a{color:#7d84a8}
.bookline{display:flex;align-items:center;gap:14px;color:var(--muted);font-size:13px}
.bookline img{height:54px}
.bookline b{color:var(--ink);font-weight:600}

/* page transitions */
.page{animation:pagein .9s var(--ease) both}
@keyframes pagein{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
body.leaving .page{opacity:0;transform:translateY(-10px);transition:opacity .35s ease,transform .35s ease}
.reveal{opacity:0;transform:translateY(18px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* start gate */
.gate{position:fixed;inset:0;z-index:40;display:grid;place-items:center;background:radial-gradient(60% 60% at 50% 40%,#0a1550 0%,var(--navy) 70%);
  transition:opacity .8s var(--ease),visibility .8s}
.gate.gone{opacity:0;visibility:hidden}
.gate .inner{text-align:center;padding:0 var(--pad);max-width:820px}
.gate .cover{height:clamp(160px,28vh,260px);filter:drop-shadow(0 30px 50px rgba(47,107,255,.45));margin-bottom:28px}
.gate h1{font-size:clamp(46px,8vw,104px)}
.gate h1 b{color:var(--blue)}
.gate p.serif{color:var(--gold);font-size:clamp(20px,2.4vw,30px);margin-top:12px}
.gate .row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:34px}
.gate small{display:block;margin-top:22px;color:var(--muted);font-size:13px}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
}
:focus-visible{outline:2px solid var(--gold);outline-offset:3px}