:root{
  --ink:#faf9f5;
  --panel:#ffffff;
  --panel-2:#fbf9f3;
  --parchment:#221f1a;
  --parchment-dim:#5b5648;
  --parchment-faint:#8d8677;
  --brass:#b8862b;
  --brass-bright:#c99a3f;
  --maroon:#8a3636;
  --maroon-bright:#a5413f;
  --line:rgba(34,31,26,0.12);
  --line-soft:rgba(34,31,26,0.06);
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }

body{
  margin:0;
  background:var(--ink);
  background-image:
    radial-gradient(ellipse 900px 500px at 15% -10%, rgba(201,154,63,0.07), transparent 60%),
    radial-gradient(ellipse 700px 500px at 100% 10%, rgba(138,54,54,0.04), transparent 60%);
  color:var(--parchment);
  font-family:'Noto Sans Thai','Inter',sans-serif;
  font-weight:300;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
  display:flex;
  flex-direction:column;
}

h1,h2,h3{ margin:0; font-weight:600; }
p{ margin:0; }
a{ color:inherit; }
img{ max-width:100%; display:block; }

.th-display{ font-family:'Noto Serif Thai','Fraunces',serif; }
.en-display{ font-family:'Fraunces',serif; }
.mono{ font-family:'IBM Plex Mono',monospace; letter-spacing:0.02em; }

.wrap{ max-width:900px; margin:0 auto; padding:0 28px; width:100%; }

.eyebrow{
  font-family:'IBM Plex Mono',monospace;
  font-size:12.5px;
  letter-spacing:0.16em;
  text-transform:uppercase;
  color:var(--brass);
}

a.quiet{ text-decoration:none; }

/* ---------- Site header / nav ---------- */

.site-header{
  border-bottom:1px solid var(--line);
  padding:22px 0;
}

.site-header .wrap{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  flex-wrap:wrap;
}

.brand{
  display:flex;
  align-items:center;
  gap:14px;
  text-decoration:none;
}

.brand-mark{
  width:38px;
  height:38px;
  perspective:400px;
  flex:none;
}

.brand-disc{
  width:100%;
  height:100%;
  position:relative;
  transform-style:preserve-3d;
  animation:spin 9s linear infinite;
}

.brand-face{
  position:absolute;
  inset:0;
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  backface-visibility:hidden;
  background:radial-gradient(circle at 35% 30%, var(--panel-2), var(--panel));
  border:1px solid var(--line);
}

.brand-face svg{ width:19px; height:19px; }
.brand-face.back{ transform:rotateY(180deg); }

.brand-name{
  font-family:'Noto Serif Thai','Fraunces',serif;
  font-size:17px;
  color:var(--parchment);
  line-height:1.3;
}

.brand-name .en{
  display:block;
  font-family:'Fraunces',serif;
  font-style:italic;
  font-size:11.5px;
  color:var(--parchment-faint);
  letter-spacing:0.02em;
}

nav.site-nav{
  display:flex;
  gap:26px;
  font-family:'IBM Plex Mono',monospace;
  font-size:13px;
}

nav.site-nav a{
  text-decoration:none;
  color:var(--parchment-dim);
  border-bottom:1px solid transparent;
  padding-bottom:2px;
  transition:color 200ms ease, border-color 200ms ease;
}

nav.site-nav a:hover,
nav.site-nav a[aria-current="page"]{
  color:var(--brass-bright);
  border-color:var(--brass-bright);
}

.lang-switch{
  font-weight:600;
  padding:3px 9px !important;
  border:1px solid var(--line) !important;
  border-radius:999px;
}

.lang-switch:hover{
  background:var(--panel-2);
}

@keyframes spin{
  from{ transform:rotateY(0deg); }
  to{ transform:rotateY(360deg); }
}

/* ---------- Page header block ---------- */

.page-head{
  padding:56px 0 40px;
  border-bottom:1px solid var(--line);
}

.page-head .eyebrow{ margin-bottom:14px; display:block; }
.page-head h1{ font-size:clamp(28px,4.4vw,40px); color:var(--parchment); }
.page-head .sub{ margin-top:12px; color:var(--parchment-dim); font-size:16px; max-width:56ch; }

main{ flex:1; }

section{ padding:56px 0; }

/* ---------- Book grid (home) ---------- */

.books-grid{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:26px;
}

.book-card{
  display:block;
  text-decoration:none;
  border:1px solid var(--line);
  background:linear-gradient(180deg, var(--panel-2), var(--panel));
  border-radius:2px;
  overflow:hidden;
  transition:transform 320ms ease, border-color 320ms ease, box-shadow 320ms ease;
}

.book-card:hover{
  transform:translateY(-4px);
  border-color:rgba(184,140,60,0.45);
  box-shadow:0 20px 36px -22px rgba(34,31,26,0.22);
}

.book-card .cover{
  aspect-ratio:2/3;
  width:100%;
  object-fit:cover;
  border-bottom:1px solid var(--line);
  background:var(--panel-2);
}

.book-card .card-body{ padding:18px 18px 22px; }

.book-card .book-year{ font-size:11.5px; color:var(--brass-bright); }

.book-card .book-title{
  margin-top:10px;
  font-size:18px;
  line-height:1.4;
  color:var(--parchment);
}

.book-card .book-isbn{
  margin-top:12px;
  font-size:12px;
  color:var(--parchment-faint);
}

.book-card .book-price{
  margin-top:8px;
  font-size:14px;
  color:var(--brass-bright);
}

.book-card .read-more{
  margin-top:14px;
  font-size:13.5px;
  color:var(--parchment-dim);
}

/* ---------- Book detail page ---------- */

.back-link{
  display:inline-block;
  margin-bottom:28px;
  font-family:'IBM Plex Mono',monospace;
  font-size:13.5px;
  color:var(--parchment-dim);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color 200ms ease, border-color 200ms ease;
}

.back-link:hover{ color:var(--brass-bright); border-color:var(--brass-bright); }

.book-detail{
  display:block;
}

.book-hero{
  margin:0 auto 40px;
  max-width:none;
  text-align:center;
}

.book-hero .cover{
  display:inline-block;
  width:50vw;
  max-width:480px;
  min-width:180px;
  border:1px solid var(--line);
  border-radius:3px;
  box-shadow:0 24px 44px -26px rgba(34,31,26,0.28);
}

.book-info{
  max-width:680px;
  margin:0 auto;
}

.book-detail-title{
  font-size:clamp(24px,3.6vw,34px);
  color:var(--parchment);
  line-height:1.35;
}

.meta-list{
  margin-top:24px;
  display:grid;
  grid-template-columns:auto 1fr;
  gap:10px 20px;
  font-size:14.5px;
}

.meta-list dt{
  color:var(--parchment-faint);
  font-family:'IBM Plex Mono',monospace;
  font-size:12.5px;
  text-transform:uppercase;
  letter-spacing:0.08em;
  align-self:baseline;
}

.meta-list dd{
  margin:0;
  color:var(--parchment-dim);
}

.note-badge{
  display:inline-block;
  margin-top:22px;
  padding:10px 16px;
  border:1px dashed var(--line);
  font-size:14px;
  color:var(--parchment-dim);
}

.note-badge .tag{
  color:var(--maroon-bright);
  font-family:'IBM Plex Mono',monospace;
  font-size:11px;
  letter-spacing:0.06em;
  margin-right:8px;
}

.goodreads-link{
  display:flex;
  align-items:center;
  gap:8px;
  margin-top:18px;
  font-size:14px;
  color:var(--parchment-dim);
  text-decoration:none;
  border-bottom:1px solid transparent;
  width:fit-content;
  transition:color 200ms ease, border-color 200ms ease;
}

.goodreads-link:hover{ color:var(--brass); border-color:var(--brass); }
.goodreads-link svg{ width:15px; height:15px; flex:none; }

.synopsis{
  margin-top:30px;
  padding-top:26px;
  border-top:1px solid var(--line);
}

.synopsis h2{
  font-size:12.5px;
  font-family:'IBM Plex Mono',monospace;
  text-transform:uppercase;
  letter-spacing:0.14em;
  color:var(--brass);
  margin-bottom:16px;
}

.synopsis p{
  color:var(--parchment-dim);
  font-size:17px;
  max-width:60ch;
}

.synopsis.verse p{
  font-family:'Fraunces',serif;
  font-style:italic;
  font-size:20px;
  line-height:1.9;
  color:var(--parchment);
}

/* ---------- About page ---------- */

.about-body{ max-width:64ch; font-size:17px; color:var(--parchment-dim); }
.about-body p + p{ margin-top:18px; }
.about-body strong{ color:var(--parchment); font-weight:500; }

/* ---------- Contact page ---------- */

.contact-list{ display:flex; flex-direction:column; gap:16px; max-width:420px; }

.contact-item{
  display:flex;
  align-items:center;
  gap:16px;
  border:1px solid var(--line);
  padding:18px 20px;
  border-radius:2px;
  text-decoration:none;
  transition:border-color 220ms ease, transform 220ms ease;
}

.contact-item:hover{ border-color:rgba(184,140,60,0.45); transform:translateX(4px); }

.contact-item svg{ width:22px; height:22px; flex:none; }

.contact-item .label{
  font-family:'IBM Plex Mono',monospace;
  font-size:11px;
  text-transform:uppercase;
  letter-spacing:0.1em;
  color:var(--parchment-faint);
  display:block;
}

.contact-item .value{ font-size:16px; color:var(--parchment); margin-top:3px; }

/* ---------- Footer ---------- */

footer{
  border-top:1px solid var(--line);
  padding:28px 0 40px;
}

footer .wrap{
  display:flex;
  justify-content:space-between;
  align-items:center;
  flex-wrap:wrap;
  gap:12px;
  color:var(--parchment-faint);
  font-size:13.5px;
}

/* ---------- Responsive ---------- */

@media (max-width:820px){
  .books-grid{ grid-template-columns:repeat(2, 1fr); }
}

@media (max-width:560px){
  .wrap{ padding:0 16px; }

  .books-grid{ grid-template-columns:repeat(3, 1fr); gap:10px; }

  .book-card .card-body{ padding:10px 8px 12px; }
  .book-card .book-year{ font-size:9px; }
  .book-card .book-title{
    margin-top:6px;
    font-size:11.5px;
    line-height:1.35;
  }
  .book-card .book-isbn{ margin-top:6px; font-size:8px; line-height:1.4; }
  .book-card .book-price{ margin-top:4px; font-size:9.5px; }
  .book-card .read-more{ display:none; }

  nav.site-nav{ gap:16px; font-size:12px; }
}

:focus-visible{ outline:2px solid var(--brass-bright); outline-offset:3px; }

@media (prefers-reduced-motion: reduce){
  .brand-disc{ animation:none; }
  .book-card, .contact-item, .back-link{ transition:none; }
}