/* Home page only: the starfield hero. It stays dark in both themes, like the book cover. */
.hero{position:relative;min-height:100vh;min-height:100svh;display:flex;align-items:center;overflow:hidden;isolation:isolate;padding:96px 0 80px;color:#e8edf6;
  background:radial-gradient(900px 600px at 15% 70%,rgba(60,110,190,.28),transparent 65%),
             radial-gradient(700px 500px at 80% 10%,rgba(40,70,140,.22),transparent 60%),#050a16}
#sky{position:absolute;inset:0;width:100%;height:100%;z-index:-3;will-change:transform}
/* Earth's limb, bottom right, like the cover */
.planet{position:absolute;z-index:-2;width:150vmax;height:150vmax;border-radius:50%;left:30%;top:calc(100% - 22vmin);
  background:radial-gradient(circle at 50% 50%,#08111f 0 69%,#0e2442 70.2%,#1f5d97 70.6%,transparent 71.2%);
  box-shadow:0 0 120px 30px rgba(79,159,224,.28);will-change:transform}
.planet::after{content:"";position:absolute;inset:-2px;border-radius:50%;box-shadow:inset 0 30px 60px -20px rgba(140,200,255,.55)}
/* the golden beam of the space elevator */
.beam{position:absolute;z-index:-1;left:40%;top:-10%;width:2px;height:120%;transform-origin:top;transform:rotate(-34deg);
  background:linear-gradient(180deg,transparent,rgba(255,207,90,.15) 20%,rgba(255,207,90,.55) 70%,#fff3c4 92%,transparent);
  filter:drop-shadow(0 0 6px rgba(255,190,60,.9));opacity:.75}
.beam::after{content:"";position:absolute;left:-2px;width:6px;height:90px;border-radius:3px;top:-10%;
  background:linear-gradient(180deg,transparent,#fff7d6,transparent);filter:blur(1px);animation:climb 5.5s cubic-bezier(.5,0,.6,1) infinite}
@keyframes climb{from{top:105%}to{top:-12%}}
.hero .wrap{position:relative;width:100%;display:grid;grid-template-columns:1.2fr .8fr;gap:48px;align-items:center;will-change:transform,opacity}
.hero .soon{display:inline-flex;align-items:center;gap:10px;font-family:Oswald,sans-serif;text-transform:uppercase;letter-spacing:.2em;font-size:.85rem;color:#111;background:#f5b21c;padding:6px 12px;border-radius:2px}
.hero .soon i{width:8px;height:8px;border-radius:50%;background:#111;animation:pulse 1.6s ease-in-out infinite}
@keyframes pulse{50%{opacity:.25}}
.hero .by{margin:22px 0 4px;color:#9eabc0;font-family:Oswald,sans-serif;text-transform:uppercase;letter-spacing:.22em;font-size:.9rem}
.hero h1{margin:0;line-height:.9;text-transform:uppercase;color:#f5b21c;font-size:clamp(3.2rem,10vw,7rem);font-weight:700;text-shadow:0 4px 40px rgba(245,178,28,.25)}
.hero h1 small{display:block;color:#fff;font-size:.3em;letter-spacing:.1em;line-height:1.2;margin-top:.5em}
.hero .hook{font-family:"Source Serif 4",Georgia,serif;text-transform:none;font-size:1.25rem;max-width:30em;color:#cfd8e6;margin:18px 0 0}
.count{display:flex;gap:10px;margin-top:26px}
.count div{min-width:70px;text-align:center;padding:10px 6px 8px;border:1px solid rgba(245,178,28,.35);background:rgba(5,10,22,.55);border-radius:4px}
.count b{display:block;font-size:2rem;line-height:1;color:#fff;font-weight:500;font-variant-numeric:tabular-nums}
.count span{font-size:.7rem;letter-spacing:.2em;text-transform:uppercase;color:#9eabc0;font-family:Oswald,sans-serif}
.hero .bookwrap{position:relative;justify-self:center;perspective:1200px}
.hero .bookwrap::before{content:"";position:absolute;inset:8% -10%;background:radial-gradient(closest-side,rgba(79,159,224,.45),transparent);filter:blur(20px);z-index:-1}
.hero .bookwrap img{width:min(340px,70vw);height:auto;border-radius:3px;
  box-shadow:0 30px 60px rgba(0,0,0,.6),0 0 0 1px rgba(255,255,255,.08);animation:float 7s ease-in-out infinite;transform:rotateY(-8deg) rotateX(2deg)}
@keyframes float{50%{transform:rotateY(-4deg) rotateX(0) translateY(-12px)}}
.scrollcue{position:absolute;left:50%;bottom:18px;transform:translateX(-50%);color:#9eabc0;text-decoration:none;font-family:Oswald,sans-serif;text-transform:uppercase;letter-spacing:.25em;font-size:.72rem;text-align:center}
.scrollcue::after{content:"";display:block;width:1px;height:34px;margin:8px auto 0;background:linear-gradient(#f5b21c,transparent);animation:cue 2s ease-in-out infinite}
@keyframes cue{0%{transform:scaleY(0);transform-origin:top}50%{transform:scaleY(1);transform-origin:top}51%{transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}
@media (max-width:860px){
  .hero{padding:88px 0 70px;text-align:center}
  .hero .wrap{grid-template-columns:1fr;gap:34px}
  .hero .bookwrap{order:-1}
  .hero .bookwrap img{width:min(170px,44vw)}
  .hero .hook{margin:18px auto 0}
  .count,.hero .btns{justify-content:center}
  .count div{min-width:62px}
  .beam{left:70%;opacity:.45}
  .scrollcue{display:none}
}

/* the band right under the hero: a hard edge from night sky to paper */
.intro{background:var(--bg);border-top:4px solid #f5b21c;padding:56px 0 0}
.intro .wrap{display:grid;grid-template-columns:auto 1fr;gap:40px;align-items:center}
.intro h2{margin:0;font-size:clamp(1.6rem,3.4vw,2.3rem)}
.intro h2 span{display:block;color:var(--accent);font-size:.5em;letter-spacing:.14em;margin-top:.3em}
.intro p{margin:0;font-size:1.15rem}
@media (max-width:760px){.intro .wrap{grid-template-columns:1fr;gap:14px;text-align:center}}
#about{padding-top:60px}

/* home: the two books side by side */
.shelf{display:grid;grid-template-columns:1fr 1fr;gap:30px}
.shelf .item{display:grid;grid-template-columns:150px 1fr;gap:24px;align-items:start;background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:24px}
.shelf .item h3{font-size:1.35rem}
.shelf .item .hook{font-size:1.05rem}
.shelf .item p{margin:.4em 0 0;color:var(--muted);font-size:.98rem}
.shelf .btns{margin-top:18px;gap:10px}
.shelf .btn{padding:10px 16px;font-size:.9rem}
@media (max-width:900px){.shelf{grid-template-columns:1fr}}
@media (max-width:480px){.shelf .item{grid-template-columns:110px 1fr;gap:16px;padding:18px}}

/* home: short about */
.teaser{display:grid;grid-template-columns:340px 1fr;gap:60px;align-items:center}
.teaser p{font-size:1.1rem}
@media (max-width:820px){.teaser{grid-template-columns:1fr;gap:40px}.teaser .portrait{max-width:300px}}