/* =========================================================
   Isaac S. Pereira — author site
   Design: literary serif meets technical mono.
   Palette: cool paper, slate-indigo, restrained brass.
   ========================================================= */

:root{
  --paper:      #edece7;   /* cool off-white (not warm cream) */
  --paper-soft: #f6f5f1;   /* raised surfaces / cards */
  --ink:        #17191e;   /* cool near-black */
  --ink-soft:   #4a4e57;   /* secondary text */
  --line:       #d6d4cc;   /* hairlines */
  --slate:      #33425e;   /* structural accent */
  --brass:      #9a7b40;   /* small flourishes only */

  --display: "Fraunces", Georgia, "Times New Roman", serif;
  --body:    "Newsreader", Georgia, "Times New Roman", serif;
  --mono:    "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --wrap: 1140px;
  --gap: clamp(1.5rem, 4vw, 3rem);
}

*{ box-sizing: border-box; }

html{ -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body{
  margin:0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 1.0625rem;
  line-height: 1.65;
  font-optical-sizing: auto;
  -webkit-font-smoothing: antialiased;
}

img{ max-width:100%; display:block; }
a{ color: inherit; }

.wrap{
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 5vw, 2.5rem);
}

/* ---------- eyebrow / mono labels ---------- */
.eyebrow{
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--slate);
  margin: 0 0 1rem;
}
.eyebrow .num{ color: var(--brass); }

/* ---------- header ---------- */
.site-header{
  position: sticky; top:0; z-index: 50;
  background: color-mix(in srgb, var(--paper) 86%, transparent);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap{
  display:flex; align-items:center; justify-content:space-between;
  height: 64px;
}
.wordmark{
  font-family: var(--mono);
  font-size: .8rem;
  letter-spacing: .26em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink);
}
.nav{ display:flex; gap: clamp(1rem, 3vw, 2rem); }
.nav a{
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink-soft);
  padding: .25rem 0;
  border-bottom: 1px solid transparent;
  transition: color .2s, border-color .2s;
}
.nav a:hover{ color: var(--ink); border-color: var(--brass); }

/* ---------- hero ---------- */
.hero{ padding: clamp(3.5rem, 11vw, 7.5rem) 0 clamp(2.5rem, 7vw, 4.5rem); }
.hero h1{
  font-family: var(--display);
  font-weight: 460;
  font-size: clamp(2.5rem, 6.2vw, 4.6rem);
  line-height: 1.04;
  letter-spacing: -0.015em;
  margin: 0 0 1.4rem;
  max-width: 16ch;
}
.hero .lede{
  font-size: clamp(1.1rem, 2.2vw, 1.3rem);
  color: var(--ink-soft);
  max-width: 54ch;
  margin: 0;
}
.hero .lede em{ color: var(--ink); font-style: italic; }

/* ---------- section frame ---------- */
.section{ padding: clamp(2.5rem, 7vw, 5rem) 0; }
.section-head{
  display:flex; align-items: baseline; gap: 1rem;
  border-top: 1px solid var(--ink);
  padding-top: 1rem;
  margin-bottom: clamp(2rem, 5vw, 3rem);
}
.section-head h2{
  font-family: var(--display);
  font-weight: 480;
  font-size: clamp(1.5rem, 3.2vw, 2.1rem);
  letter-spacing: -0.01em;
  margin:0;
}
.section-head .count{
  margin-left:auto;
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .18em;
  color: var(--ink-soft);
}

/* ---------- book grid ---------- */
.books{
  display:grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: clamp(1.5rem, 4vw, 2.75rem);
}
.book-card{
  display:flex; flex-direction:column;
  background: var(--paper-soft);
  border: 1px solid var(--line);
  text-decoration:none; color: inherit;
}
.book-card .cover-wrap{
  display:block;
  position: relative;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
  background: var(--slate);
}
.book-card .cover-wrap img{
  width:100%; aspect-ratio: 2/3; object-fit: cover;
  transition: transform .5s ease;
}
.book-card:hover .cover-wrap img{ transform: scale(1.03); }
.book-card .card-body{
  padding: 1.4rem 1.4rem 1.6rem;
  display:flex; flex-direction:column; flex:1;
}
.book-card .kicker{
  font-family: var(--mono);
  font-size: .68rem; letter-spacing: .18em; text-transform: uppercase;
  color: var(--slate); margin: 0 0 .7rem;
}
.book-card .kicker .num{ color: var(--brass); }
.book-card h3{
  font-family: var(--display);
  font-weight: 480;
  font-size: 1.4rem;
  line-height: 1.12;
  margin: 0 0 .55rem;
  letter-spacing: -0.01em;
}
.book-card h3 a{ text-decoration:none; color:inherit; transition: color .2s; }
.book-card h3 a:hover{ color: var(--slate); }
.book-card .blurb{
  font-size: .98rem;
  color: var(--ink-soft);
  margin: 0 0 1.4rem;
}
.book-card .actions{ margin-top:auto; display:flex; flex-wrap:wrap; gap:.6rem; }

/* ---------- buttons ---------- */
.btn{
  font-family: var(--mono);
  font-size: .72rem; letter-spacing: .12em; text-transform: uppercase;
  text-decoration:none;
  display:inline-flex; align-items:center; gap:.5em;
  padding: .7rem 1.05rem;
  border: 1px solid var(--ink);
  transition: transform .15s ease, background .2s, color .2s, box-shadow .2s;
  cursor:pointer;
}
.btn:hover{ transform: translateY(-2px); }
.btn-primary{
  background: var(--ink); color: var(--paper);
}
.btn-primary:hover{ box-shadow: 0 6px 0 -2px var(--brass); }
.btn-primary .arrow{ transition: transform .2s; }
.btn-primary:hover .arrow{ transform: translateX(3px); }
.btn-ghost{
  background: transparent; color: var(--ink);
  border-color: var(--line);
}
.btn-ghost:hover{ border-color: var(--ink); }
.btn-lg{ padding: .95rem 1.5rem; font-size: .78rem; }

/* ---------- about strip ---------- */
.about{ padding: clamp(3rem, 8vw, 6rem) 0; }
.about-grid{
  display:grid; grid-template-columns: 1fr; gap: var(--gap);
}
.about-grid .about-copy p{ max-width: 60ch; }
.about-grid .about-copy p + p{ margin-top: 1.1rem; }
.about .pull{
  font-family: var(--display);
  font-weight: 400; font-style: italic;
  font-size: clamp(1.3rem, 3vw, 1.9rem);
  line-height: 1.3;
  color: var(--ink);
  border-left: 2px solid var(--brass);
  padding-left: 1.25rem;
  margin: 0;
}

/* ---------- book detail page ---------- */
.crumbs{
  font-family: var(--mono);
  font-size: .72rem; letter-spacing: .14em; text-transform: uppercase;
  padding: 1.6rem 0 0;
}
.crumbs a{ color: var(--ink-soft); text-decoration:none; }
.crumbs a:hover{ color: var(--ink); }

.detail{ padding: clamp(2rem, 5vw, 3.5rem) 0 clamp(3.5rem, 9vw, 6rem); }
.detail-grid{
  display:grid;
  grid-template-columns: minmax(240px, 360px) 1fr;
  gap: clamp(2rem, 6vw, 4.5rem);
  align-items:start;
}
.detail-cover{ position: sticky; top: 96px; }
.detail-cover img{
  width:100%; border:1px solid var(--line);
  box-shadow: 0 18px 40px -24px rgba(23,25,30,.55);
}
.detail-cover .buy-under{ margin-top: 1.25rem; display:flex; flex-direction:column; gap:.6rem; }

.detail h1{
  font-family: var(--display);
  font-weight: 460;
  font-size: clamp(2rem, 4.6vw, 3.1rem);
  line-height: 1.06;
  letter-spacing: -0.015em;
  margin: .2rem 0 .4rem;
}
.detail .subtitle{
  font-family: var(--display);
  font-style: italic; font-weight: 400;
  font-size: clamp(1.15rem, 2.4vw, 1.45rem);
  color: var(--ink-soft);
  margin: 0 0 2rem;
}
.detail .body-copy p{ margin: 0 0 1.15rem; max-width: 62ch; }
.detail .body-copy p:first-of-type::first-letter{
  font-family: var(--display);
  font-size: 3.1em; line-height: .8;
  float:left; padding: .05em .12em 0 0; color: var(--slate);
}

.colophon{
  margin-top: 2.2rem;
  border-top: 1px solid var(--line);
  padding-top: 1.4rem;
  display:grid; grid-template-columns: repeat(auto-fit, minmax(140px,1fr));
  gap: 1.1rem 1.5rem;
}
.colophon dt{
  font-family: var(--mono);
  font-size: .66rem; letter-spacing: .16em; text-transform: uppercase;
  color: var(--slate); margin-bottom: .25rem;
}
.colophon dd{ margin:0; font-size: .98rem; }

/* ---------- footer ---------- */
.site-footer{
  border-top: 1px solid var(--ink);
  padding: clamp(2.5rem, 6vw, 4rem) 0;
  margin-top: 2rem;
}
.site-footer .wrap{
  display:flex; flex-wrap:wrap; gap: 1rem 2rem;
  align-items:center; justify-content:space-between;
}
.site-footer .fm{
  font-family: var(--mono); font-size:.74rem;
  letter-spacing:.2em; text-transform:uppercase;
}
.site-footer .fine{
  font-family: var(--mono); font-size:.68rem; letter-spacing:.06em;
  color: var(--ink-soft);
}

/* ---------- 404 ---------- */
.notfound{ min-height: 60vh; display:grid; place-content:center; text-align:center; gap:1rem; }
.notfound h1{ font-family:var(--display); font-size: clamp(3rem,12vw,6rem); margin:0; }

/* ---------- responsive ---------- */
@media (max-width: 760px){
  .detail-grid{ grid-template-columns: 1fr; }
  .detail-cover{ position: static; max-width: 320px; }
  .site-header .wrap{ height: 58px; }
}

/* ---------- entrance motion (only hides when JS is active) ---------- */
.js .reveal{ opacity:0; transform: translateY(14px); }
.js .reveal.in{ opacity:1; transform:none; transition: opacity .7s ease, transform .7s ease; }

/* ---------- coming-soon / disabled buy button ---------- */
.btn-disabled{ opacity:.5; cursor: not-allowed; pointer-events:none; }
.btn-disabled .arrow{ display:none; }

@media (prefers-reduced-motion: reduce){
  *{ scroll-behavior:auto !important; }
  .js .reveal{ opacity:1 !important; transform:none !important; transition:none !important; }
  .btn:hover, .book-card:hover .cover-wrap img{ transform:none !important; }
}

/* ---------- focus visibility ---------- */
a:focus-visible, .btn:focus-visible{
  outline: 2px solid var(--slate);
  outline-offset: 3px;
}