:root {
  --night: #070b18;
  --navy: #0e1730;
  --navy-2: #15213f;
  --gold: #e9c47a;
  --gold-deep: #c99a45;
  --ivory: #f3ecdd;
  --mist: #aeb7c9;
  --line: rgba(233, 196, 122, 0.28);
  --serif: "EB Garamond", Garamond, Georgia, "Times New Roman", serif;
  --display: "Cinzel", "Trajan Pro", "EB Garamond", Georgia, serif;
  --gutter: clamp(18px, 5vw, 48px);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 72px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--night);
  color: var(--ivory);
  font-family: var(--serif);
  font-size: clamp(18px, 1.05rem + 0.25vw, 21px);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: var(--gold); text-underline-offset: 3px; }
a:hover { color: var(--ivory); }

h1, h2, h3 { font-family: var(--display); font-weight: 500; letter-spacing: 0.06em; margin: 0; }
h2 { font-size: clamp(1.5rem, 1.1rem + 1.6vw, 2.3rem); color: var(--gold); text-align: center; }
h3 { font-size: 1.15rem; color: var(--gold); }

/* ---------- Navigation ---------- */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 20;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px var(--gutter);
  background: linear-gradient(to bottom, rgba(7, 11, 24, 0.9), rgba(7, 11, 24, 0));
  transition: background 0.3s;
}
.nav.scrolled { background: rgba(7, 11, 24, 0.94); backdrop-filter: blur(8px); border-bottom: 1px solid rgba(233, 196, 122, 0.12); }
.nav-title { font-family: var(--display); color: var(--ivory); text-decoration: none; letter-spacing: 0.08em; font-size: 0.95rem; }
.nav-links { display: flex; gap: clamp(14px, 2.4vw, 32px); align-items: center; }
.nav-links a { color: var(--mist); text-decoration: none; font-size: 0.95rem; letter-spacing: 0.04em; }
.nav-links a:hover { color: var(--gold); }
.nav-links .nav-buy { color: var(--night); background: var(--gold); padding: 4px 16px; border-radius: 999px; }
.nav-links .nav-buy:hover { color: var(--night); background: var(--ivory); }
.nav-toggle { display: none; }

@media (max-width: 760px) {
  .nav-toggle {
    display: grid; gap: 6px; background: none; border: 0; padding: 8px; cursor: pointer;
  }
  .nav-toggle span { display: block; width: 24px; height: 2px; background: var(--gold); transition: transform 0.25s; }
  .nav-toggle[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }
  .nav-links {
    position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; gap: 0; padding: 8px var(--gutter) 18px;
    background: rgba(7, 11, 24, 0.97); border-bottom: 1px solid var(--line);
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 10px 0; width: 100%; text-align: center; font-size: 1.05rem; }
  .nav-links .nav-buy { width: auto; margin-top: 8px; padding: 6px 28px; }
}

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  min-height: 100vh; min-height: 100svh;
  display: grid; align-items: center;
  padding: 110px var(--gutter) 80px;
  background:
    radial-gradient(ellipse at 30% 55%, rgba(233, 196, 122, 0.10), transparent 55%),
    linear-gradient(to bottom, rgba(7, 11, 24, 0.2), var(--night) 96%),
    url("assets/sky.jpg") center / cover no-repeat;
}
@supports (background-image: url("x.webp")) {
  .hero {
    background:
      radial-gradient(ellipse at 30% 55%, rgba(233, 196, 122, 0.10), transparent 55%),
      linear-gradient(to bottom, rgba(7, 11, 24, 0.2), var(--night) 96%),
      image-set(url("assets/sky.webp") type("image/webp"), url("assets/sky.jpg") type("image/jpeg")) center / cover no-repeat;
  }
}
.stars {
  position: absolute; inset: 0; pointer-events: none;
  background-image:
    radial-gradient(1px 1px at 12% 22%, #fff8, transparent),
    radial-gradient(1px 1px at 68% 14%, #fff9, transparent),
    radial-gradient(1.5px 1.5px at 84% 40%, #ffe9b0aa, transparent),
    radial-gradient(1px 1px at 40% 70%, #fff6, transparent),
    radial-gradient(1px 1px at 92% 78%, #fff7, transparent),
    radial-gradient(1.5px 1.5px at 22% 86%, #ffe9b088, transparent);
  animation: twinkle 7s ease-in-out infinite alternate;
}
@keyframes twinkle { from { opacity: 0.35; } to { opacity: 1; } }

.hero-inner {
  position: relative;
  width: 100%; max-width: 1120px; margin: 0 auto;
  display: grid; grid-template-columns: minmax(0, 380px) minmax(0, 1fr);
  gap: clamp(32px, 6vw, 84px); align-items: center;
}
.hero-book { perspective: 1400px; justify-self: center; width: 100%; max-width: 360px; }
.book {
  position: relative;
  transform: rotateY(-14deg) rotateX(2deg);
  transform-style: preserve-3d;
  transition: transform 0.8s cubic-bezier(.2,.7,.2,1);
  box-shadow: 30px 40px 60px -20px rgba(0, 0, 0, 0.85), 0 0 90px -10px rgba(233, 196, 122, 0.25);
  border-radius: 2px 5px 5px 2px;
}
.book::before {
  content: ""; position: absolute; top: 0; bottom: 0; left: 0; width: 5%;
  background: linear-gradient(to right, rgba(255,255,255,0.18), rgba(0,0,0,0.35) 60%, transparent);
  z-index: 1; border-radius: 2px 0 0 2px;
}
.book img { width: 100%; height: auto; border-radius: 2px 5px 5px 2px; }
.hero-book:hover .book { transform: rotateY(-4deg) rotateX(0deg); }

.eyebrow { color: var(--mist); letter-spacing: 0.28em; text-transform: uppercase; font-size: 0.8rem; margin: 0 0 14px; }
.hero h1 {
  font-size: clamp(2.4rem, 1.4rem + 4.2vw, 4.6rem);
  line-height: 1.05; letter-spacing: 0.04em;
  background: linear-gradient(180deg, #fff6e2 10%, var(--gold) 60%, var(--gold-deep));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  text-shadow: 0 0 40px rgba(233, 196, 122, 0.18);
}
.hook { font-style: italic; color: var(--gold); font-size: clamp(1.2rem, 1rem + 0.8vw, 1.6rem); line-height: 1.5; margin: 28px 0 36px; }
.hook span { display: block; }

.buy-buttons { display: flex; flex-wrap: wrap; gap: 14px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: 10px 26px; border-radius: 999px;
  font-family: var(--serif); font-size: 1.05rem; letter-spacing: 0.03em;
  text-decoration: none; transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.2s;
}
.btn:hover { transform: translateY(-1px); }
.btn-gold { background: var(--gold); color: var(--night); border: 1px solid var(--gold); }
.btn-gold:hover { background: var(--ivory); border-color: var(--ivory); color: var(--night); }
.btn-ghost { color: var(--gold); border: 1px solid var(--line); background: rgba(7, 11, 24, 0.4); }
.btn-ghost:hover { border-color: var(--gold); color: var(--ivory); }
.btn.disabled { opacity: 0.55; pointer-events: none; }

@media (max-width: 760px) {
  .hero { padding-top: 96px; text-align: center; }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-book { max-width: min(70vw, 300px); }
  .book { transform: none; }
  .buy-buttons { justify-content: center; }
}

/* ---------- Sections ---------- */
.section { padding: clamp(72px, 10vw, 130px) var(--gutter); }
.narrow { max-width: 680px; margin: 0 auto; }
.wide { max-width: 1120px; margin: 0 auto; }

.rule { display: flex; justify-content: center; margin: 22px auto 40px; }
.rule span { position: relative; width: 140px; height: 1px; background: linear-gradient(to right, transparent, var(--gold), transparent); }
.rule span::after {
  content: ""; position: absolute; left: 50%; top: 50%; width: 5px; height: 5px;
  background: var(--gold); border-radius: 50%; transform: translate(-50%, -50%);
  box-shadow: 0 0 10px var(--gold);
}

.prose p { margin: 0 0 1.1em; }
.prose .standout { color: var(--gold); font-style: italic; font-size: 1.15em; text-align: center; margin: 1.6em 0; }
.prose .last { text-align: center; font-size: 1.15em; letter-spacing: 0.01em; }
.signature { text-align: right; color: var(--gold); font-style: italic; }

.story { background: linear-gradient(to bottom, var(--night), var(--navy) 60%, var(--night)); }
.premise { background: radial-gradient(ellipse at 50% 0%, var(--navy-2), var(--night) 70%); }
.premise .prose { color: #dfe3ec; }
.author strong { color: var(--gold); font-weight: 500; }

/* ---------- Buy + footer ---------- */
.buy { position: relative; text-align: center; padding: clamp(80px, 10vw, 120px) var(--gutter) 0; background: var(--night); overflow: hidden; }
.buy-inner { position: relative; z-index: 1; max-width: 680px; margin: 0 auto; }
.buy h2 em { font-style: normal; color: var(--ivory); }
.buy-note { color: var(--mist); margin: 18px 0 30px; }
.buy .buy-buttons { justify-content: center; }
.skyline { display: block; margin: -40px calc(-1 * var(--gutter)) 0; }
.skyline img {
  width: 100%; height: clamp(180px, 30vw, 420px); object-fit: cover; object-position: center 60%;
  -webkit-mask-image: linear-gradient(to bottom, transparent, #000 35%, #000 70%, transparent);
  mask-image: linear-gradient(to bottom, transparent, #000 35%, #000 70%, transparent);
}

.footer { text-align: center; padding: 10px var(--gutter) 36px; color: var(--mist); font-size: 0.9rem; }
.footer p { margin: 0; }

/* ---------- Scroll reveal ---------- */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.9s ease, transform 0.9s ease; }
.js .reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .js .reveal { opacity: 1; transform: none; transition: none; }
  .stars { animation: none; }
}