:root{
  --ink:#1B2430;
  --ink-2:#232E3D;
  --slate:#2E3B4A;
  --paper:#EFE6D8;
  --paper-dim:#C9BFAE;
  --gold:#C9A15A;
  --moss:#57735F;
  --rust:#A8492B;
  --wine:#7A3547;
  --teal:#3E6670;
  --radius:2px;
  --maxw:1180px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *{animation-duration:0.001ms !important; transition-duration:0.001ms !important;}
}

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:'Source Serif 4', serif;
  line-height:1.5;
}

a{color:inherit;}
button{font-family:inherit;}

:focus-visible{
  outline:3px solid var(--rust);
  outline-offset:3px;
}

.eyebrow{
  font-family:'IBM Plex Mono', monospace;
  font-size:0.72rem;
  letter-spacing:0.14em;
  text-transform:uppercase;
}

/* ---------- HERO / SHELF ---------- */
.hero{
  background:
    radial-gradient(ellipse at 20% -10%, rgba(201,161,90,0.10), transparent 55%),
    var(--ink);
  color:var(--paper);
  padding:4.5rem 1.5rem 0;
}
.hero-inner{
  max-width:var(--maxw);
  margin:0 auto;
}
.hero .eyebrow{color:var(--gold);}
.hero h1{
  font-family:'Fraunces', serif;
  font-weight:700;
  font-size:clamp(2.4rem, 5vw, 4.2rem);
  line-height:1.02;
  margin:0.6rem 0 1rem;
  max-width:14ch;
}
.hero h1 em{
  font-style:italic;
  font-weight:500;
  color:var(--gold);
}
.hero p.lede{
  max-width:52ch;
  color:var(--paper-dim);
  font-size:1.05rem;
  margin:0 0 3rem;
}

.shelf-wrap{
  overflow-x:auto;
  padding-bottom:0;
  -webkit-overflow-scrolling:touch;
  scrollbar-width:thin;
}
.shelf{
  display:flex;
  align-items:flex-end;
  gap:6px;
  min-width:min-content;
  padding:0 0.25rem;
}
.spine{
  --h: 260px;
  flex:0 0 auto;
  width:46px;
  height:var(--h);
  border-radius:3px 3px 0 0;
  display:flex;
  align-items:flex-start;
  justify-content:center;
  padding-top:14px;
  cursor:pointer;
  border:none;
  position:relative;
  transform:translateY(0);
  transition:transform 220ms ease, box-shadow 220ms ease;
  box-shadow:inset -6px 0 10px -6px rgba(0,0,0,0.35), inset 3px 0 0 rgba(255,255,255,0.06);
}
.spine:hover, .spine:focus-visible{
  transform:translateY(-16px);
  box-shadow:0 14px 18px -10px rgba(0,0,0,0.55), inset -6px 0 10px -6px rgba(0,0,0,0.35);
}
.spine .label{
  writing-mode:vertical-rl;
  transform:rotate(180deg);
  font-family:'IBM Plex Mono', monospace;
  font-size:0.68rem;
  letter-spacing:0.03em;
  color:rgba(239,230,216,0.92);
  white-space:nowrap;
  max-height:calc(var(--h) - 28px);
  overflow:hidden;
  text-overflow:ellipsis;
}
.shelf-board{
  height:16px;
  background:linear-gradient(180deg, #14192280, #0d1015);
  border-radius:0 0 3px 3px;
  margin-top:-1px;
}
.shelf-hint{
  color:var(--paper-dim);
  font-family:'IBM Plex Mono', monospace;
  font-size:0.7rem;
  letter-spacing:0.04em;
  text-align:center;
  padding:0.9rem 0 2.8rem;
}

/* ---------- FILTERS ---------- */
.filters{
  max-width:var(--maxw);
  margin:0 auto;
  padding:2.6rem 1.5rem 1rem;
  display:flex;
  flex-wrap:wrap;
  gap:0.5rem;
  align-items:center;
}
.filters .eyebrow{margin-right:0.5rem; color:var(--wine);}
.chip{
  background:transparent;
  border:1px solid var(--ink);
  color:var(--ink);
  border-radius:999px;
  padding:0.4rem 0.9rem;
  font-family:'IBM Plex Mono', monospace;
  font-size:0.75rem;
  letter-spacing:0.03em;
  cursor:pointer;
  transition:background 150ms ease, color 150ms ease;
}
.chip[aria-pressed="true"]{
  background:var(--ink);
  color:var(--paper);
}
.chip:hover{background:var(--ink); color:var(--paper);}

/* ---------- GRID ---------- */
.grid{
  max-width:var(--maxw);
  margin:0 auto;
  padding:1rem 1.5rem 5rem;
  display:grid;
  grid-template-columns:repeat(auto-fill, minmax(250px, 1fr));
  gap:1.4rem;
}

.card{
  background:var(--ink-2);
  color:var(--paper);
  border-radius:var(--radius);
  overflow:hidden;
  display:flex;
  flex-direction:column;
  scroll-margin-top:2rem;
  outline:2px solid transparent;
  outline-offset:4px;
  transition:outline-color 300ms ease;
}
.card.flash{
  outline-color:var(--gold);
}
.card .cover{
  height:150px;
  display:flex;
  align-items:flex-end;
  padding:0.9rem 1rem;
  position:relative;
  overflow:hidden;
}
.card .cover img{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
}
.card .cover::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg, rgba(0,0,0,0) 40%, rgba(0,0,0,0.28) 100%);
}
.card .cover:not(.cover--fallback) .cat{
  background:rgba(0,0,0,0.45);
  padding:0.15rem 0.45rem;
  border-radius:2px;
  backdrop-filter:blur(2px);
}
.card .cover .cat{
  position:relative;
  font-family:'IBM Plex Mono', monospace;
  font-size:0.66rem;
  letter-spacing:0.08em;
  text-transform:uppercase;
  color:rgba(255,255,255,0.85);
  z-index:1;
}
.card .body{
  padding:1.1rem 1.2rem 1.3rem;
  display:flex;
  flex-direction:column;
  gap:0.55rem;
  flex:1;
}
.card h3{
  font-family:'Fraunces', serif;
  font-weight:600;
  font-size:1.28rem;
  line-height:1.15;
  margin:0;
}
.card .author{
  font-family:'IBM Plex Mono', monospace;
  font-size:0.74rem;
  color:var(--gold);
  letter-spacing:0.02em;
}
.card p.blurb{
  font-size:0.9rem;
  color:var(--paper-dim);
  margin:0.1rem 0 0.4rem;
  flex:1;
}
.card .cta{
  margin-top:auto;
  display:inline-flex;
  align-items:center;
  justify-content:space-between;
  gap:0.6rem;
  background:var(--gold);
  color:var(--ink);
  text-decoration:none;
  font-family:'IBM Plex Mono', monospace;
  font-size:0.76rem;
  letter-spacing:0.03em;
  padding:0.65rem 0.9rem;
  border-radius:3px;
  transition:background 150ms ease, transform 150ms ease;
}
.card .cta:hover{
  background:#dcb877;
  transform:translateX(2px);
}
.card .cta .arrow{transition:transform 150ms ease;}
.card .cta:hover .arrow{transform:translateX(3px);}

.empty{
  grid-column:1/-1;
  text-align:center;
  padding:3rem 1rem;
  color:var(--wine);
  font-family:'IBM Plex Mono', monospace;
  font-size:0.85rem;
}

/* ---------- FOOTER ---------- */
footer{
  background:var(--ink);
  color:var(--paper-dim);
  padding:2.4rem 1.5rem 2.8rem;
}
footer .inner{
  max-width:var(--maxw);
  margin:0 auto;
  display:flex;
  flex-direction:column;
  gap:0.6rem;
}
footer .disclosure{
  font-size:0.82rem;
  max-width:70ch;
}
footer .brand{
  font-family:'Fraunces', serif;
  color:var(--paper);
  font-size:1.05rem;
}

@media (max-width:640px){
  .spine{width:38px;}
}