/* Ifan Zubuk — shared styles for the bookshelf and every book page */
:root{
  --ink:#14202e; --ink-soft:#3c4a5c; --ink-mute:#6b7787;
  --paper:#fbf7f0; --paper-2:#f3ece0; --line:#e4dacb;
  --night:#0f1c2e; --night-2:#1a2c40;
  --amber:#c7743f; --amber-strong:#a95c2c; --sun:#f0b45a;
  --serif: Georgia, "Iowan Old Style", "Times New Roman", serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --radius:14px; --wrap:1080px;
}
*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{ margin:0; background:var(--paper); color:var(--ink); font-family:var(--sans); font-size:17px; line-height:1.65; overflow-x:hidden; }
img{ max-width:100%; height:auto; display:block; }
a{ color:var(--amber-strong); }
h1,h2,h3{ font-family:var(--serif); line-height:1.15; margin:0 0 .5em; color:inherit; }
h1{ font-size:clamp(2.4rem,6vw,4rem); letter-spacing:-.01em; }
h2{ font-size:clamp(1.7rem,3.6vw,2.4rem); }
h3{ font-size:1.25rem; }
p{ margin:0 0 1em; }
.wrap{ max-width:var(--wrap); margin:0 auto; padding:0 20px; }
.narrow{ max-width:720px; }
.eyebrow{ display:block; font-size:.78rem; font-weight:700; letter-spacing:.16em; text-transform:uppercase; color:var(--amber); margin-bottom:.8em; }
section{ padding:72px 0; }
section.alt{ background:var(--paper-2); }
section.dark{ background:var(--night); color:#e9eef4; }
section.dark .eyebrow{ color:var(--sun); }
.muted{ color:var(--ink-mute); }

/* top bar */
.topbar{ position:sticky; top:0; z-index:20; background:rgba(251,247,240,.94); backdrop-filter:blur(6px); border-bottom:1px solid var(--line); }
.topbar .wrap{ display:flex; align-items:center; justify-content:space-between; gap:12px; height:60px; }
.brand{ font-family:var(--serif); font-weight:700; font-size:1.15rem; color:var(--ink); text-decoration:none; letter-spacing:.02em; }

/* buttons */
.btn{ display:inline-flex; align-items:center; justify-content:center; gap:8px; font-weight:700; font-size:1rem; text-decoration:none; border-radius:999px; padding:14px 26px; border:2px solid transparent; cursor:pointer; transition:transform .12s ease, background .12s ease; text-align:center; }
.btn:active{ transform:translateY(1px); }
.btn-buy{ background:var(--amber); color:#fff; box-shadow:0 10px 24px -12px rgba(169,92,44,.8); }
.btn-buy:hover{ background:var(--amber-strong); }
.btn-ghost{ border-color:var(--ink); color:var(--ink); background:transparent; }
.btn-sm{ padding:9px 18px; font-size:.9rem; }
.buy-note{ font-size:.85rem; color:var(--ink-mute); margin-top:10px; }
section.dark .buy-note{ color:#a9b6c6; }

/* hero */
.hero{ padding:56px 0 72px; }
.hero-grid{ display:grid; grid-template-columns:1.15fr .85fr; gap:48px; align-items:center; }
.hero .sub{ font-size:1.2rem; color:var(--ink-soft); }
.cover{ border-radius:6px; box-shadow:0 30px 60px -25px rgba(15,28,46,.55), 0 8px 18px -10px rgba(15,28,46,.4); }
.hero .cover{ max-width:360px; margin:0 auto; transform:rotate(1.5deg); }
.facts{ display:flex; flex-wrap:wrap; gap:8px 18px; list-style:none; padding:0; margin:18px 0 0; font-size:.9rem; color:var(--ink-soft); }
.facts li::before{ content:"✓ "; color:var(--amber); font-weight:700; }
@media (max-width:820px){
  .hero-grid{ grid-template-columns:1fr; gap:32px; }
  .hero .cover{ max-width:240px; order:-1; }
}

/* cards & grids */
.grid-2{ display:grid; grid-template-columns:1fr 1fr; gap:24px; }
.grid-3{ display:grid; grid-template-columns:repeat(3,1fr); gap:20px; }
@media (max-width:820px){ .grid-2,.grid-3{ grid-template-columns:1fr; } }
.card{ background:#fff; border:1px solid var(--line); border-radius:var(--radius); padding:24px; }
.card h3{ margin-bottom:.35em; }
.card p:last-child{ margin-bottom:0; }
.list-yes, .list-no{ list-style:none; padding:0; margin:0; }
.list-yes li, .list-no li{ padding:8px 0 8px 30px; position:relative; border-top:1px solid var(--line); }
.list-yes li:first-child, .list-no li:first-child{ border-top:none; }
.list-yes li::before{ content:"✓"; position:absolute; left:4px; color:#2f7a4f; font-weight:800; }
.list-no li::before{ content:"✕"; position:absolute; left:4px; color:#b0473a; font-weight:800; }

/* chapters */
.chapters{ counter-reset:ch; display:grid; gap:12px; }
.chapter{ display:grid; grid-template-columns:56px 1fr; gap:14px; align-items:start; background:#fff; border:1px solid var(--line); border-radius:var(--radius); padding:18px 20px; }
.chapter .num{ font-family:var(--serif); font-size:1.9rem; color:var(--amber); line-height:1; }
.chapter h3{ font-size:1.1rem; margin:2px 0 4px; }
.chapter p{ margin:0; font-size:.95rem; color:var(--ink-soft); }
.chapter.ws .num{ font-size:1rem; font-family:var(--sans); font-weight:800; letter-spacing:.08em; padding-top:6px; }

/* excerpts */
.excerpt{ background:#fff; border:1px solid var(--line); border-left:5px solid var(--amber); border-radius:var(--radius); padding:26px 28px; margin-bottom:22px; }
.excerpt .from{ font-size:.78rem; font-weight:700; letter-spacing:.12em; text-transform:uppercase; color:var(--ink-mute); margin-bottom:.4em; display:block; }
.excerpt h3{ margin-bottom:.6em; }
.excerpt p{ font-family:var(--serif); font-size:1.05rem; color:#24303d; }
.excerpt p:last-child{ margin-bottom:0; }

/* pull quote */
.pull{ font-family:var(--serif); font-size:clamp(1.6rem,4vw,2.5rem); line-height:1.25; margin:0 0 .6em; }

/* price compare */
.compare{ display:grid; grid-template-columns:1fr auto 1fr; gap:18px; align-items:stretch; text-align:center; }
.compare .box{ border-radius:var(--radius); padding:26px 18px; }
.compare .bad{ background:rgba(255,255,255,.06); border:1px solid rgba(255,255,255,.15); }
.compare .good{ background:var(--sun); color:var(--night); }
.compare .big{ font-family:var(--serif); font-size:clamp(1.8rem,4vw,2.6rem); font-weight:700; display:block; margin:.15em 0; }
.compare .vs{ align-self:center; font-weight:800; color:var(--sun); }
@media (max-width:640px){ .compare{ grid-template-columns:1fr; } }

/* media (optional video and photos) */
.video-wrap{ position:relative; aspect-ratio:16/9; border-radius:var(--radius); overflow:hidden; background:#000; }
.video-wrap video, .video-wrap iframe{ position:absolute; inset:0; width:100%; height:100%; border:0; }
.gallery{ display:grid; grid-template-columns:repeat(auto-fill,minmax(220px,1fr)); gap:14px; }
.gallery figure{ margin:0; }
.gallery img{ border-radius:10px; aspect-ratio:4/3; object-fit:cover; width:100%; }
.gallery figcaption{ font-size:.85rem; color:var(--ink-mute); margin-top:6px; }
[hidden]{ display:none !important; }

/* faq */
details{ background:#fff; border:1px solid var(--line); border-radius:var(--radius); padding:16px 20px; margin-bottom:10px; }
summary{ cursor:pointer; font-weight:700; }
details p{ margin:.7em 0 0; color:var(--ink-soft); }

/* bookshelf */
.shelf{ display:grid; grid-template-columns:repeat(auto-fill,minmax(250px,1fr)); gap:28px; }
.book-card{ background:#fff; border:1px solid var(--line); border-radius:var(--radius); padding:22px; display:flex; flex-direction:column; gap:12px; text-decoration:none; color:inherit; }
.book-card img{ border-radius:4px; box-shadow:0 14px 30px -16px rgba(15,28,46,.55); }
.book-card .tag{ font-size:.75rem; font-weight:700; letter-spacing:.1em; text-transform:uppercase; color:var(--amber); }
.book-card.soon{ align-items:center; justify-content:center; text-align:center; border-style:dashed; background:transparent; color:var(--ink-mute); min-height:260px; }

footer{ background:var(--night); color:#a9b6c6; padding:36px 0; font-size:.88rem; }
footer a{ color:#e9eef4; }
footer .wrap{ display:flex; flex-wrap:wrap; justify-content:space-between; gap:12px; }

/* featured book on the home page */
.feature{ display:grid; grid-template-columns:260px 1fr; gap:40px; align-items:center; background:#fff; border:1px solid var(--line); border-radius:var(--radius); padding:32px; margin-top:24px; }
.feature-cover img{ border-radius:4px; box-shadow:0 18px 36px -18px rgba(15,28,46,.6); }
.feature .tag{ font-size:.75rem; font-weight:700; letter-spacing:.1em; text-transform:uppercase; color:var(--amber); }
.feature h3{ font-size:clamp(1.6rem,3.4vw,2.2rem); margin:.3em 0 .3em; }
.feature h3 a{ color:var(--ink); text-decoration:none; }
.feature-sub{ font-size:1.1rem; color:var(--ink-soft); }
.feature-actions{ display:flex; flex-wrap:wrap; gap:12px; margin-top:8px; }
.soon-line{ text-align:center; color:var(--ink-mute); font-style:italic; margin:28px 0 0; }
@media (max-width:720px){
  .feature{ grid-template-columns:1fr; gap:24px; padding:22px; }
  .feature-cover img{ max-width:200px; margin:0 auto; }
  .feature-actions .btn{ flex:1 1 100%; }
}

/* footer privacy line */
footer .privacy{ margin-top:10px; font-size:.8rem; color:#8595a8; }