: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:1080px; 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);
}

/* ---------- Site header / nav (shared with navagan.com) ---------- */

.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;
  align-items:center;
  gap:26px;
  font-family:'IBM Plex Mono',monospace;
  font-size:17px;
}

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);
}

.nav-dropdown{ position:relative; }

.nav-dropdown-toggle{
  -webkit-appearance:none;
  appearance:none;
  background:none;
  border:none;
  outline:none;
  box-shadow:none;
  margin:0;
  padding:0 0 2px;
  font-family:inherit;
  font-size:inherit;
  line-height:inherit;
  color:var(--parchment-dim);
  cursor:pointer;
  display:inline-flex;
  align-items:center;
  gap:5px;
  border-bottom:1px solid transparent;
  transition:color 200ms ease, border-color 200ms ease;
}

.nav-dropdown-toggle svg{ width:11px; height:11px; transition:transform 180ms ease; }

.nav-dropdown-toggle:hover,
.nav-dropdown.open .nav-dropdown-toggle{
  color:var(--brass-bright);
  border-color:var(--brass-bright);
}

.nav-dropdown.open .nav-dropdown-toggle svg{ transform:rotate(180deg); }

.nav-dropdown-menu{
  position:absolute;
  top:100%;
  left:0;
  margin-top:12px;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:8px;
  padding:6px;
  min-width:170px;
  box-shadow:0 16px 32px -16px rgba(34,31,26,0.25);
  opacity:0;
  transform:translateY(-6px);
  pointer-events:none;
  transition:opacity 160ms ease, transform 160ms ease;
  z-index:60;
}

.nav-dropdown.open .nav-dropdown-menu{
  opacity:1;
  transform:translateY(0);
  pointer-events:auto;
}

.nav-dropdown-menu a{
  display:block;
  padding:9px 12px;
  border-radius:6px;
  font-size:14px;
  text-decoration:none;
  color:var(--parchment-dim);
  border-bottom:none !important;
}

.nav-dropdown-menu a:hover{ background:var(--panel-2); color:var(--parchment); }

.nav-dropdown-menu a[aria-current="page"]{
  background:var(--panel-2);
  color:var(--brass-bright);
}

.nav-dropdown-menu a.disabled{
  color:var(--parchment-faint);
  cursor:not-allowed;
  pointer-events:none;
  display:flex;
  justify-content:space-between;
  gap:8px;
}

.nav-dropdown-menu a.disabled .soon{
  font-family:'IBM Plex Mono',monospace;
  font-size:10px;
  color:var(--parchment-faint);
}

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

.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);
}

/* ---------- Layout: slide-in sidebar drawer ---------- */

main{ flex:1; }

.layout{ position:relative; }

.sidebar-toggle{
  display:flex;
  align-items:center;
  gap:8px;
  background:none;
  border:1px solid var(--line);
  border-radius:999px;
  padding:8px 16px;
  font-family:'IBM Plex Mono',monospace;
  font-size:13px;
  color:var(--parchment-dim);
  cursor:pointer;
  transition:border-color 180ms ease, color 180ms ease;
}

.sidebar-toggle:hover{ border-color:var(--brass-bright); color:var(--parchment); }
.sidebar-toggle svg{ width:15px; height:15px; flex:none; }

.sidebar-overlay{
  position:fixed;
  inset:0;
  background:rgba(20,17,13,0.35);
  opacity:0;
  pointer-events:none;
  transition:opacity 250ms ease;
  z-index:40;
}

body.sidebar-open .sidebar-overlay{ opacity:1; pointer-events:auto; }

.sidebar{
  position:fixed;
  top:0;
  left:0;
  height:100vh;
  width:280px;
  max-width:82vw;
  background:var(--panel);
  border-right:1px solid var(--line);
  overflow-y:auto;
  padding:28px 0;
  transform:translateX(-100%);
  transition:transform 260ms ease;
  z-index:50;
  box-shadow:24px 0 48px -30px rgba(0,0,0,0.25);
}

body.sidebar-open .sidebar{ transform:translateX(0); }

.sidebar-close{
  display:flex;
  align-items:center;
  gap:8px;
  margin:0 28px 18px;
  background:none;
  border:none;
  padding:0;
  font-family:'IBM Plex Mono',monospace;
  font-size:12px;
  color:var(--parchment-faint);
  cursor:pointer;
}

.sidebar-close:hover{ color:var(--brass-bright); }

.sidebar-title{
  padding:0 28px 14px;
  font-family:'IBM Plex Mono',monospace;
  font-size:11px;
  letter-spacing:0.12em;
  text-transform:uppercase;
  color:var(--parchment-faint);
}

.book-list{
  list-style:none;
  margin:0;
  padding:0;
}

.book-list a{
  display:block;
  padding:9px 28px;
  text-decoration:none;
  border-left:2px solid transparent;
  font-size:14px;
  line-height:1.4;
  color:var(--parchment-dim);
  transition:background 180ms ease, border-color 180ms ease, color 180ms ease;
}

.book-list a:hover{
  background:var(--panel-2);
  color:var(--parchment);
}

.book-list a[aria-current="page"]{
  background:var(--panel-2);
  border-left-color:var(--brass-bright);
  color:var(--parchment);
}

.content{
  padding:44px 44px 60px;
  max-width:760px;
  margin:0 auto;
}

/* ---------- Index + Search (home page) ---------- */

.index-wrap{ padding:44px 28px 60px; max-width:760px; margin:0 auto; }

.index-wrap .eyebrow{ display:block; }

.index-wrap h1{
  margin-top:12px;
  font-size:clamp(26px,3.6vw,36px);
  color:var(--parchment);
}

.index-intro{
  margin-top:14px;
  color:var(--parchment-dim);
  font-size:16px;
  max-width:56ch;
}

.search-box{ margin-top:28px; }

.search-box input{
  width:100%;
  padding:13px 18px;
  border:1px solid var(--line);
  border-radius:6px;
  background:var(--panel);
  color:var(--parchment);
  font-family:'Noto Sans Thai','Inter',sans-serif;
  font-size:15px;
}

.search-box input:focus{
  outline:none;
  border-color:var(--brass-bright);
}

.search-box input::placeholder{ color:var(--parchment-faint); }

.index-list{
  list-style:none;
  margin:24px 0 0;
  padding:0;
  border-top:1px solid var(--line);
}

.index-row{ border-bottom:1px solid var(--line); }

.index-row a{
  display:flex;
  align-items:baseline;
  gap:14px;
  padding:14px 4px;
  text-decoration:none;
  transition:background 160ms ease;
}

.index-row a:hover{ background:var(--panel-2); }

.index-row-title{
  font-family:'Noto Serif Thai','Fraunces',serif;
  font-size:16px;
  color:var(--parchment);
  flex:1;
}

.index-row-author{
  font-size:13px;
  color:var(--parchment-faint);
  white-space:nowrap;
}

.index-row-stars{
  font-size:13px;
  color:var(--brass-bright);
  letter-spacing:1px;
  white-space:nowrap;
}

.index-empty{
  margin-top:24px;
  color:var(--parchment-faint);
  font-size:14px;
}

@media (max-width:560px){
  .index-row a{ flex-wrap:wrap; }
  .index-row-title{ width:100%; }
}

/* ---------- Landing (index) ---------- */

.landing{ padding:44px 44px 60px; max-width:760px; margin:0 auto; }

.landing-intro h1{
  font-size:clamp(26px,3.6vw,36px);
  color:var(--parchment);
  margin-top:14px;
}

.landing-intro p{
  margin-top:18px;
  color:var(--parchment-dim);
  font-size:16px;
  max-width:56ch;
}

.search-box{
  margin-top:32px;
  position:relative;
}

.search-box input{
  width:100%;
  padding:13px 18px 13px 42px;
  border:1px solid var(--line);
  border-radius:8px;
  background:var(--panel);
  color:var(--parchment);
  font-family:'Noto Sans Thai','Inter',sans-serif;
  font-size:15px;
  outline:none;
  transition:border-color 180ms ease;
}

.search-box input:focus{ border-color:var(--brass-bright); }

.search-box svg{
  position:absolute;
  left:15px;
  top:50%;
  transform:translateY(-50%);
  width:16px;
  height:16px;
  color:var(--parchment-faint);
  pointer-events:none;
}

.index-title{
  margin-top:44px;
  font-family:'IBM Plex Mono',monospace;
  font-size:11px;
  letter-spacing:0.12em;
  text-transform:uppercase;
  color:var(--parchment-faint);
}

.index-list{
  list-style:none;
  margin:14px 0 0;
  padding:0;
  border-top:1px solid var(--line);
}

.index-list li{ border-bottom:1px solid var(--line); }

.index-list a{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:16px;
  padding:16px 4px;
  text-decoration:none;
  transition:background 160ms ease;
}

.index-list a:hover{ background:var(--panel-2); }

.index-list .idx-title{
  font-family:'Noto Serif Thai','Fraunces',serif;
  font-size:16px;
  color:var(--parchment);
}

.index-list .idx-author{
  margin-top:4px;
  font-size:13px;
  color:var(--parchment-dim);
}

.index-list .idx-stars{
  flex:none;
  color:var(--brass-bright);
  font-size:13px;
  letter-spacing:1px;
  white-space:nowrap;
}

.index-empty{
  display:none;
  padding:24px 4px;
  color:var(--parchment-faint);
  font-size:14px;
}

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

.book-header{
  display:flex;
  gap:28px;
  align-items:flex-start;
  flex-wrap:wrap;
}

.book-header .cover{
  width:130px;
  border:1px solid var(--line);
  border-radius:3px;
  box-shadow:0 20px 36px -22px rgba(34,31,26,0.25);
  flex:none;
}

.book-title{
  font-size:clamp(22px,3vw,30px);
  color:var(--parchment);
  line-height:1.35;
}

.book-author{ margin-top:8px; font-size:15px; color:var(--parchment-dim); }

.stars{ margin-top:14px; color:var(--brass-bright); font-size:17px; letter-spacing:2px; }

.meta-list{
  margin-top:16px;
  display:grid;
  grid-template-columns:auto 1fr;
  gap:6px 16px;
  font-size:13px;
}

.meta-list dt{
  color:var(--parchment-faint);
  font-family:'IBM Plex Mono',monospace;
  font-size:11px;
  text-transform:uppercase;
  letter-spacing:0.08em;
}

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

.review-text{
  margin-top:34px;
  padding-top:28px;
  border-top:1px solid var(--line);
  font-size:16px;
  color:var(--parchment-dim);
  max-width:64ch;
}

.review-text .spoiler{
  color:var(--maroon-bright);
  font-family:'IBM Plex Mono',monospace;
  font-size:12.5px;
  letter-spacing:0.02em;
}

.book-nav{
  margin-top:44px;
  padding-top:20px;
  border-top:1px solid var(--line);
  display:flex;
  justify-content:space-between;
  gap:16px;
  font-family:'IBM Plex Mono',monospace;
  font-size:12.5px;
}

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

.book-nav a:hover{ color:var(--brass-bright); border-color:var(--brass-bright); }

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

footer{ border-top:1px solid var(--line); padding:24px 0; }

footer .wrap{
  display:flex;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:10px;
  color:var(--parchment-faint);
  font-size:11px;
}

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

@media (max-width:820px){
  .content{ padding:28px 20px 48px; }
  .book-header .cover{ width:100px; }
  nav.site-nav{ gap:14px; font-size:15px; }
  .sidebar{ width:260px; }
}

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