/* ==========================================================================
   Books-in — livraria e biblioteca digital
   Design system próprio: dark warm, âmbar como acento, serifa editorial.
   ========================================================================== */

:root {
  --bg: #0b0a09;
  --bg-2: #120f0d;
  --surface: rgba(255, 255, 255, 0.045);
  --surface-2: rgba(255, 255, 255, 0.075);
  --line: rgba(255, 255, 255, 0.1);
  --line-soft: rgba(255, 255, 255, 0.055);

  --txt: #f7f4ef;
  --txt-2: #cfc7bb;
  --txt-3: #a29a8e;
  --txt-4: #7a7268;

  --amber: #e8a33d;
  --amber-soft: #f2c98a;
  --amber-deep: #b97a1c;
  --sage: #8fb99a;

  --r-sm: 10px;
  --r-md: 16px;
  --r-lg: 24px;
  --r-full: 999px;

  --maxw: 1200px;
  --pad: clamp(1.15rem, 4vw, 2.5rem);

  --ease: cubic-bezier(0.22, 0.75, 0.25, 1);
  --shadow: 0 24px 60px -24px rgba(0, 0, 0, 0.85);

  --font-ui: "Inter", ui-sans-serif, system-ui, -apple-system, sans-serif;
  --font-serif: "Fraunces", "Iowan Old Style", Georgia, serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--txt);
  font-family: var(--font-ui);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body.trava-scroll { overflow: hidden; }

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
input, select { font: inherit; }

::selection { background: rgba(232, 163, 61, 0.28); }

::-webkit-scrollbar { width: 9px; height: 9px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.09); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255, 255, 255, 0.18); }

/* ---------- fundo decorativo ---------- */
.fundo {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background:
    radial-gradient(900px 600px at 82% -8%, rgba(232, 163, 61, 0.13), transparent 62%),
    radial-gradient(700px 520px at 6% 28%, rgba(143, 185, 154, 0.07), transparent 60%),
    var(--bg);
}
.fundo::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.35;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.022) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(circle at 50% 0%, #000 10%, transparent 72%);
}

/* ---------- utilitários ---------- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.secao { padding: clamp(4rem, 9vw, 7.5rem) 0; }
.secao--linha { border-top: 1px solid var(--line-soft); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber-soft);
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--amber));
}

h1, h2, h3 { margin: 0; font-family: var(--font-serif); font-weight: 500; letter-spacing: -0.02em; line-height: 1.08; }
h1 { font-size: clamp(2.5rem, 6.2vw, 4.3rem); }
h2 { font-size: clamp(1.95rem, 4.2vw, 3rem); }
h3 { font-size: 1.12rem; font-family: var(--font-ui); font-weight: 600; letter-spacing: -0.01em; line-height: 1.3; }

.lead { color: var(--txt-2); font-size: clamp(1rem, 1.6vw, 1.14rem); max-width: 56ch; }
.cab { max-width: 60ch; display: grid; gap: 1rem; margin-bottom: 2.75rem; }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  backdrop-filter: blur(14px);
}

/* ---------- botões ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  border-radius: var(--r-full);
  padding: 0.82rem 1.45rem;
  font-size: 0.93rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  transition: transform 0.25s var(--ease), background 0.25s, border-color 0.25s, box-shadow 0.25s;
  white-space: nowrap;
}
.btn svg { flex: none; }
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--primario {
  background: linear-gradient(180deg, var(--amber-soft), var(--amber));
  color: #251706;
  box-shadow: 0 10px 28px -12px rgba(232, 163, 61, 0.7), inset 0 1px 0 rgba(255, 255, 255, 0.45);
}
.btn--primario:hover { box-shadow: 0 16px 34px -12px rgba(232, 163, 61, 0.85), inset 0 1px 0 rgba(255, 255, 255, 0.5); }

.btn--fantasma {
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--txt);
  backdrop-filter: blur(10px);
}
.btn--fantasma:hover { background: var(--surface-2); border-color: rgba(255, 255, 255, 0.2); }

.btn--bloco { width: 100%; }
.btn--sm { padding: 0.58rem 1.05rem; font-size: 0.85rem; }

/* ==========================================================================
   Topo
   ========================================================================== */
.topo {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(11, 10, 9, 0.72);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(18px) saturate(140%);
  transition: border-color 0.3s, background 0.3s;
}
.topo.ativo { border-bottom-color: var(--line-soft); background: rgba(11, 10, 9, 0.9); }

.topo__in {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  height: 70px;
}

.marca { display: inline-flex; align-items: center; gap: 0.6rem; margin-right: auto; }
.marca__logo {
  position: relative;
  display: block;
  flex: none;
  width: 42px;
  height: 42px;
  border-radius: 13px;
  overflow: hidden;
  background: #fff;
  box-shadow: 0 8px 18px -10px rgba(0, 0, 0, 0.85), inset 0 0 0 1px rgba(74, 44, 29, 0.1);
  transition: transform 0.3s var(--ease);
}
/* a arte tem margem própria: ampliamos para recortar o branco em volta */
.marca__logo img {
  position: absolute;
  top: -8%;
  left: -8%;
  width: 116%;
  height: 116%;
  object-fit: contain;
}
.marca:hover .marca__logo { transform: rotate(-3deg) scale(1.05); }

.marca__nome {
  font-family: "Poppins", var(--font-ui);
  font-size: 1.22rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: #f4e2c6;
}
.marca__nome b { color: var(--amber); font-weight: 700; }

.marca--rodape .marca__logo { width: 54px; height: 54px; border-radius: 16px; }
.marca--rodape .marca__nome { font-size: 1.45rem; }

.nav { display: flex; gap: 0.35rem; }
.nav a {
  padding: 0.5rem 0.85rem;
  border-radius: var(--r-full);
  font-size: 0.9rem;
  color: var(--txt-3);
  transition: color 0.2s, background 0.2s;
}
.nav a:hover { color: var(--txt); background: var(--surface); }

.topo__acoes { display: flex; align-items: center; gap: 0.6rem; }

.pino {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--r-full);
  background: var(--surface);
  font-size: 0.86rem;
  font-weight: 500;
  transition: background 0.2s, border-color 0.2s;
}
.pino:hover { background: var(--surface-2); border-color: rgba(255, 255, 255, 0.2); }
.pino__badge {
  display: grid;
  place-items: center;
  min-width: 20px;
  height: 20px;
  padding: 0 5px;
  border-radius: var(--r-full);
  background: var(--amber);
  color: #241605;
  font-size: 0.7rem;
  font-weight: 700;
}
.pino__badge[hidden] { display: none; }

.menu-btn { display: none; padding: 0.5rem; border-radius: 10px; border: 1px solid var(--line); }

/* ==========================================================================
   Hero
   ========================================================================== */
.hero { position: relative; padding: clamp(3.5rem, 8vw, 6rem) 0 clamp(3rem, 7vw, 5rem); }
.hero__grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}
.hero h1 { margin-bottom: 1.15rem; }
.hero h1 em { font-style: italic; color: var(--amber-soft); }
.hero .eyebrow { margin-bottom: 1.3rem; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 0.75rem; margin: 2rem 0 2.25rem; }

.hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 1.75rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--line-soft);
}
.hero__stats strong {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.7rem;
  font-weight: 500;
  letter-spacing: -0.02em;
}
.hero__stats span { font-size: 0.8rem; color: var(--txt-4); }

.hero__arte { position: relative; }
.hero__arte img {
  width: 100%;
  aspect-ratio: 14 / 11;
  object-fit: cover;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}
.hero__arte::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--r-lg);
  background: linear-gradient(200deg, transparent 40%, rgba(11, 10, 9, 0.75));
  pointer-events: none;
}

.flutua {
  position: absolute;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.7rem 0.95rem;
  border-radius: var(--r-md);
  background: rgba(18, 15, 13, 0.82);
  border: 1px solid var(--line);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow);
  animation: flutuar 6s ease-in-out infinite;
}
.flutua--um { bottom: 1.25rem; left: -1.25rem; }
.flutua--dois { top: 1.25rem; right: -1rem; animation-delay: -3s; }
.flutua small { display: block; font-size: 0.72rem; color: var(--txt-4); }
.flutua b { font-size: 0.86rem; font-weight: 600; }

@keyframes flutuar {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-9px); }
}

.mini-prog {
  width: 74px;
  height: 5px;
  border-radius: 99px;
  background: rgba(255, 255, 255, 0.12);
  overflow: hidden;
  margin-top: 0.3rem;
}
.mini-prog i { display: block; height: 100%; background: var(--amber); border-radius: 99px; }

/* ==========================================================================
   Biblioteca / catálogo
   ========================================================================== */
.biblio__topo {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.ferramentas { display: flex; flex-wrap: wrap; gap: 0.6rem; align-items: center; }

.busca { position: relative; }
.busca svg { position: absolute; left: 0.9rem; top: 50%; transform: translateY(-50%); color: var(--txt-4); }
.busca input {
  width: 260px;
  padding: 0.68rem 1rem 0.68rem 2.5rem;
  border-radius: var(--r-full);
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--txt);
  font-size: 0.9rem;
  transition: border-color 0.2s, background 0.2s;
}
.busca input::placeholder { color: var(--txt-4); }
.busca input:focus { outline: none; border-color: rgba(232, 163, 61, 0.5); background: var(--surface-2); }

.filtros { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.chip {
  padding: 0.5rem 0.95rem;
  border-radius: var(--r-full);
  border: 1px solid var(--line);
  background: var(--surface);
  font-size: 0.83rem;
  color: var(--txt-3);
  transition: all 0.2s var(--ease);
}
.chip:hover { color: var(--txt); border-color: rgba(255, 255, 255, 0.22); }
.chip[aria-pressed="true"] {
  background: rgba(232, 163, 61, 0.14);
  border-color: rgba(232, 163, 61, 0.45);
  color: var(--amber-soft);
}

.grade-livros {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(215px, 1fr));
  gap: clamp(1.1rem, 2.2vw, 1.75rem);
}

.livro { display: flex; flex-direction: column; gap: 0.8rem; text-align: left; }

.livro__capa {
  position: relative;
  aspect-ratio: 2 / 3;
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--bg-2);
  box-shadow: 0 18px 40px -22px rgba(0, 0, 0, 0.9);
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
}
.livro:hover .livro__capa { transform: translateY(-7px); box-shadow: 0 28px 55px -22px rgba(0, 0, 0, 0.95); }
.livro__capa img { width: 100%; height: 100%; object-fit: cover; }
.livro__capa::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(190deg, rgba(0, 0, 0, 0.1) 30%, rgba(8, 7, 6, 0.9));
}
.livro__capa-txt {
  position: absolute;
  inset: auto 0 0 0;
  z-index: 2;
  padding: 0.9rem 0.95rem 1rem;
}
.livro__capa-txt strong {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.02rem;
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.02em;
  text-wrap: balance;
}
.livro__capa-txt span { font-size: 0.74rem; color: var(--txt-3); }

.livro__selo {
  position: absolute;
  z-index: 2;
  top: 0.7rem;
  left: 0.7rem;
  padding: 0.2rem 0.6rem;
  border-radius: var(--r-full);
  background: rgba(232, 163, 61, 0.92);
  color: #24150a;
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.livro__ler {
  position: absolute;
  z-index: 3;
  inset: auto 0.7rem 0.7rem 0.7rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.6rem;
  border-radius: var(--r-full);
  background: rgba(247, 244, 239, 0.95);
  color: #1b1408;
  font-size: 0.83rem;
  font-weight: 650;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
}
.livro:hover .livro__ler, .livro:focus-within .livro__ler { opacity: 1; transform: translateY(0); }
.livro:hover .livro__capa-txt, .livro:focus-within .livro__capa-txt { opacity: 0; transition: opacity 0.25s; }

.livro__meta { display: flex; align-items: center; justify-content: space-between; gap: 0.6rem; font-size: 0.79rem; color: var(--txt-4); }
.livro__nota { display: inline-flex; align-items: center; gap: 0.28rem; color: var(--amber-soft); }
.livro__prog { font-size: 0.76rem; color: var(--sage); }

.vazio { padding: 3rem 1rem; text-align: center; color: var(--txt-4); grid-column: 1 / -1; }

/* ==========================================================================
   Recursos
   ========================================================================== */
.recursos { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.1rem; }
.recurso { padding: 1.6rem; display: grid; gap: 0.7rem; align-content: start; transition: border-color 0.3s, transform 0.3s var(--ease); }
.recurso:hover { border-color: rgba(232, 163, 61, 0.32); transform: translateY(-4px); }
.recurso__ico {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 13px;
  background: rgba(232, 163, 61, 0.13);
  border: 1px solid rgba(232, 163, 61, 0.22);
  color: var(--amber-soft);
  margin-bottom: 0.3rem;
}
.recurso p { margin: 0; font-size: 0.92rem; color: var(--txt-3); }

/* ==========================================================================
   Como funciona
   ========================================================================== */
.passos-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: clamp(2rem, 5vw, 4rem); align-items: center; }
.passos { display: grid; gap: 0.35rem; counter-reset: p; }
.passo {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.1rem;
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--line-soft);
}
.passo:last-child { border-bottom: 0; }
.passo__num {
  counter-increment: p;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: var(--r-full);
  border: 1px solid rgba(232, 163, 61, 0.35);
  background: rgba(232, 163, 61, 0.1);
  color: var(--amber-soft);
  font-size: 0.85rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.passo__num::before { content: counter(p, decimal-leading-zero); }
.passo p { margin: 0.25rem 0 0; font-size: 0.92rem; color: var(--txt-3); }

/* mockup do leitor */
.mock {
  position: relative;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: linear-gradient(170deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
  padding: 0.85rem;
  box-shadow: var(--shadow);
}
.mock__barra { display: flex; align-items: center; gap: 0.4rem; padding: 0 0.3rem 0.75rem; }
.mock__barra i { width: 9px; height: 9px; border-radius: 99px; background: rgba(255, 255, 255, 0.16); }
.mock__barra span { margin-left: auto; font-size: 0.72rem; color: var(--txt-4); }
.mock__papel {
  border-radius: 14px;
  background: #f4ece0;
  color: #2b2519;
  padding: 1.6rem 1.5rem;
  font-family: var(--font-serif);
  font-size: 0.95rem;
  line-height: 1.75;
}
.mock__papel h4 { margin: 0 0 0.8rem; font-size: 1.05rem; font-weight: 600; letter-spacing: -0.01em; }
.mock__papel p { margin: 0 0 0.7rem; }
.mock__papel p:last-child { margin: 0; color: #6a5f4c; }
.mock__rodape { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 0.85rem 0.4rem 0.2rem; font-size: 0.76rem; color: var(--txt-4); }
.mock__rodape .mini-prog { width: 130px; margin: 0; }

/* ==========================================================================
   Depoimentos
   ========================================================================== */
.depos { display: grid; grid-template-columns: repeat(auto-fit, minmax(265px, 1fr)); gap: 1.1rem; }
.depo { padding: 1.7rem; display: grid; gap: 1.1rem; align-content: start; }
.depo__estrelas { color: var(--amber); letter-spacing: 0.12em; font-size: 0.86rem; }
.depo blockquote { margin: 0; font-family: var(--font-serif); font-size: 1.05rem; line-height: 1.55; color: var(--txt); }
.depo__autor { display: flex; align-items: center; gap: 0.7rem; }
.depo__ini {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: var(--r-full);
  background: rgba(232, 163, 61, 0.16);
  border: 1px solid rgba(232, 163, 61, 0.24);
  color: var(--amber-soft);
  font-size: 0.8rem;
  font-weight: 700;
}
.depo__autor b { display: block; font-size: 0.88rem; font-weight: 600; }
.depo__autor span { font-size: 0.76rem; color: var(--txt-4); }

/* ==========================================================================
   Planos
   ========================================================================== */
.planos { display: grid; grid-template-columns: repeat(auto-fit, minmax(275px, 1fr)); gap: 1.1rem; align-items: start; }
.plano { padding: 1.9rem; display: grid; gap: 1.2rem; align-content: start; }
.plano--destaque {
  border-color: rgba(232, 163, 61, 0.42);
  background: linear-gradient(180deg, rgba(232, 163, 61, 0.1), rgba(255, 255, 255, 0.035));
  box-shadow: 0 30px 70px -40px rgba(232, 163, 61, 0.5);
}
.plano__tag {
  display: inline-flex;
  align-self: start;
  padding: 0.28rem 0.7rem;
  border-radius: var(--r-full);
  background: rgba(232, 163, 61, 0.18);
  border: 1px solid rgba(232, 163, 61, 0.3);
  color: var(--amber-soft);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.plano__preco { display: flex; align-items: baseline; gap: 0.4rem; font-family: var(--font-serif); }
.plano__preco strong { font-size: 2.6rem; font-weight: 500; letter-spacing: -0.03em; }
.plano__preco span { font-family: var(--font-ui); font-size: 0.85rem; color: var(--txt-4); }
.plano ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.6rem; }
.plano li { display: grid; grid-template-columns: auto 1fr; gap: 0.6rem; font-size: 0.9rem; color: var(--txt-2); }
.plano li svg { margin-top: 0.3rem; color: var(--sage); }
.plano p { margin: 0; font-size: 0.9rem; color: var(--txt-3); }

/* ==========================================================================
   CTA final + rodapé
   ========================================================================== */
.cta {
  position: relative;
  overflow: hidden;
  padding: clamp(2.5rem, 6vw, 4.5rem);
  border-radius: 32px;
  text-align: center;
  border: 1px solid rgba(232, 163, 61, 0.28);
  background:
    radial-gradient(700px 320px at 50% 0%, rgba(232, 163, 61, 0.2), transparent 70%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.02));
}
.cta > * { position: relative; z-index: 1; }
.cta .lead { margin: 1rem auto 2rem; text-align: center; }
.cta__acoes { display: flex; flex-wrap: wrap; gap: 0.75rem; justify-content: center; }

.rodape { border-top: 1px solid var(--line-soft); padding: 3.5rem 0 2.5rem; margin-top: clamp(3rem, 7vw, 5.5rem); }
.rodape__grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 2rem; }
.rodape p { margin: 0.9rem 0 0; font-size: 0.88rem; color: var(--txt-4); max-width: 34ch; }
.rodape h4 { margin: 0 0 0.9rem; font-size: 0.75rem; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase; color: var(--txt-4); }
.rodape ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.55rem; }
.rodape ul a { font-size: 0.89rem; color: var(--txt-2); transition: color 0.2s; }
.rodape ul a:hover { color: var(--amber-soft); }
.rodape__base {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  align-items: center;
  margin-top: 3rem;
  padding-top: 1.6rem;
  border-top: 1px solid var(--line-soft);
  font-size: 0.8rem;
  color: var(--txt-4);
}

/* ==========================================================================
   Estante (drawer)
   ========================================================================== */
.overlay {
  position: fixed;
  inset: 0;
  z-index: 80;
  background: rgba(6, 5, 4, 0.66);
  backdrop-filter: blur(6px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
}
.overlay.aberto { opacity: 1; visibility: visible; }

.estante {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 90;
  width: min(410px, 100%);
  height: 100%;
  display: flex;
  flex-direction: column;
  background: #100e0c;
  border-left: 1px solid var(--line);
  transform: translateX(102%);
  transition: transform 0.4s var(--ease);
}
.estante.aberto { transform: none; }
.estante__topo {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.35rem 1.5rem;
  border-bottom: 1px solid var(--line-soft);
}
.estante__topo h3 { margin-right: auto; }
.estante__corpo { flex: 1; overflow-y: auto; padding: 1.25rem 1.5rem 2rem; display: grid; gap: 0.75rem; align-content: start; }
.estante__rodape { padding: 1.1rem 1.5rem; border-top: 1px solid var(--line-soft); font-size: 0.8rem; color: var(--txt-4); }

.icone-btn {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: var(--r-full);
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--txt-2);
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}
.icone-btn:hover { background: var(--surface-2); color: var(--txt); border-color: rgba(255, 255, 255, 0.22); }

.item-estante {
  display: grid;
  grid-template-columns: 52px 1fr auto;
  gap: 0.9rem;
  align-items: center;
  padding: 0.7rem;
  border-radius: var(--r-md);
  border: 1px solid var(--line-soft);
  background: var(--surface);
  text-align: left;
  transition: background 0.2s, border-color 0.2s;
}
.item-estante:hover { background: var(--surface-2); border-color: var(--line); }
.item-estante img { width: 52px; height: 74px; object-fit: cover; border-radius: 8px; }
.item-estante b { display: block; font-size: 0.9rem; font-weight: 600; line-height: 1.25; }
.item-estante small { display: block; font-size: 0.76rem; color: var(--txt-4); margin-bottom: 0.4rem; }
.item-estante .mini-prog { width: 100%; }
.item-estante__pct { font-size: 0.78rem; color: var(--sage); font-variant-numeric: tabular-nums; }

/* ==========================================================================
   Leitor
   ========================================================================== */
.leitor {
  position: fixed;
  inset: 0;
  z-index: 120;
  display: flex;
  flex-direction: column;
  background: #100e0c;
  opacity: 0;
  visibility: hidden;
  transform: scale(0.99);
  transition: opacity 0.3s, visibility 0.3s, transform 0.3s var(--ease);
}
.leitor.aberto { opacity: 1; visibility: visible; transform: none; }

.leitor__topo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem clamp(0.8rem, 3vw, 1.5rem);
  border-bottom: 1px solid var(--line-soft);
  background: rgba(16, 14, 12, 0.95);
  backdrop-filter: blur(12px);
}
.leitor__id { min-width: 0; margin-right: auto; }
.leitor__id b { display: block; font-size: 0.92rem; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.leitor__id span { font-size: 0.76rem; color: var(--txt-4); }

.leitor__ctrl { display: flex; align-items: center; gap: 0.35rem; }
.grupo {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  padding: 0.2rem;
  border-radius: var(--r-full);
  border: 1px solid var(--line);
  background: var(--surface);
}
.grupo button {
  display: grid;
  place-items: center;
  min-width: 30px;
  height: 30px;
  padding: 0 0.5rem;
  border-radius: var(--r-full);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--txt-3);
  transition: background 0.2s, color 0.2s;
}
.grupo button:hover { background: var(--surface-2); color: var(--txt); }
.grupo button[aria-pressed="true"] { background: rgba(232, 163, 61, 0.2); color: var(--amber-soft); }

.leitor__prog { height: 3px; background: rgba(255, 255, 255, 0.07); }
.leitor__prog i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--amber-deep), var(--amber-soft)); transition: width 0.25s; }

.leitor__meio { flex: 1; display: flex; min-height: 0; }

.sumario {
  width: 268px;
  flex: none;
  border-right: 1px solid var(--line-soft);
  overflow-y: auto;
  padding: 1.25rem 1rem 2rem;
  background: rgba(255, 255, 255, 0.015);
}
.sumario h4 { margin: 0 0 0.9rem 0.6rem; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase; color: var(--txt-4); }
.sumario button {
  display: block;
  width: 100%;
  text-align: left;
  padding: 0.65rem 0.8rem;
  border-radius: 11px;
  font-size: 0.87rem;
  color: var(--txt-3);
  transition: background 0.2s, color 0.2s;
}
.sumario button:hover { background: var(--surface); color: var(--txt); }
.sumario button[aria-current="true"] { background: rgba(232, 163, 61, 0.13); color: var(--amber-soft); font-weight: 600; }
.sumario.oculto { display: none; }

.leitor__scroll { flex: 1; overflow-y: auto; scroll-behavior: smooth; }

.pagina {
  --leitura: 18px;
  --medida: 34rem;
  max-width: var(--medida);
  margin: 0 auto;
  padding: clamp(2.2rem, 6vw, 4.5rem) clamp(1.3rem, 5vw, 2rem) 5rem;
}
.pagina__cab { margin-bottom: 2.2rem; padding-bottom: 1.4rem; border-bottom: 1px solid var(--line-soft); }
.pagina__cab small { font-size: 0.74rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--txt-4); }
.pagina__cab h2 { margin-top: 0.5rem; font-size: clamp(1.6rem, 3.5vw, 2.2rem); }
.pagina__sinopse {
  margin: 1rem 0 0 !important;
  font-family: var(--font-ui) !important;
  font-size: 0.89rem !important;
  line-height: 1.6 !important;
  text-align: left !important;
  color: var(--txt-4) !important;
}
.leitor[data-tema="sepia"] .pagina__sinopse { color: #8a7657 !important; }
.leitor[data-tema="claro"] .pagina__sinopse { color: #7c7770 !important; }

.pagina > p {
  margin: 0 0 1.35em;
  font-family: var(--font-serif);
  font-size: var(--leitura);
  line-height: 1.85;
  color: var(--txt);
  text-align: justify;
  hyphens: auto;
}
.pagina > p:first-of-type::first-letter {
  float: left;
  font-size: 3.1em;
  line-height: 0.82;
  padding: 0.1em 0.12em 0 0;
  color: var(--amber-soft);
}

.pagina__nav { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-top: 3rem; padding-top: 1.75rem; border-top: 1px solid var(--line-soft); }
.pagina__fim { text-align: center; padding: 2.5rem 0 0; color: var(--txt-4); font-size: 0.9rem; }

/* temas de leitura */
.leitor[data-tema="sepia"] .leitor__scroll { background: #f2e7d5; }
.leitor[data-tema="sepia"] .pagina > p { color: #33291a; }
.leitor[data-tema="sepia"] .pagina__cab h2 { color: #241c10; }
.leitor[data-tema="sepia"] .pagina__cab small,
.leitor[data-tema="sepia"] .pagina__fim { color: #8a7657; }
.leitor[data-tema="sepia"] .pagina__cab,
.leitor[data-tema="sepia"] .pagina__nav { border-color: rgba(51, 41, 26, 0.16); }
.leitor[data-tema="sepia"] .pagina > p:first-of-type::first-letter { color: #a8741d; }
.leitor[data-tema="sepia"] .btn--fantasma { background: rgba(51, 41, 26, 0.06); border-color: rgba(51, 41, 26, 0.18); color: #33291a; }

.leitor[data-tema="claro"] .leitor__scroll { background: #fbfaf8; }
.leitor[data-tema="claro"] .pagina > p { color: #22201c; }
.leitor[data-tema="claro"] .pagina__cab h2 { color: #14120f; }
.leitor[data-tema="claro"] .pagina__cab small,
.leitor[data-tema="claro"] .pagina__fim { color: #7c7770; }
.leitor[data-tema="claro"] .pagina__cab,
.leitor[data-tema="claro"] .pagina__nav { border-color: rgba(20, 18, 15, 0.12); }
.leitor[data-tema="claro"] .pagina > p:first-of-type::first-letter { color: #b07716; }
.leitor[data-tema="claro"] .btn--fantasma { background: rgba(20, 18, 15, 0.05); border-color: rgba(20, 18, 15, 0.14); color: #22201c; }

/* aviso flutuante */
.toast {
  position: fixed;
  z-index: 200;
  left: 50%;
  bottom: 2rem;
  transform: translate(-50%, 140%);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.8rem 1.2rem;
  border-radius: var(--r-full);
  background: #1c1815;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  font-size: 0.87rem;
  transition: transform 0.4s var(--ease);
}
.toast.aberto { transform: translate(-50%, 0); }
.toast svg { color: var(--sage); }

/* ---------- animação de entrada ---------- */
.rev { opacity: 0; transform: translateY(26px); }
.rev.visivel { opacity: 1; transform: none; transition: opacity 0.75s var(--ease), transform 0.75s var(--ease); }
.rev.d1.visivel { transition-delay: 0.08s; }
.rev.d2.visivel { transition-delay: 0.16s; }
.rev.d3.visivel { transition-delay: 0.24s; }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition-duration: 0.01ms !important; }
  .rev { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* ==========================================================================
   Responsivo
   ========================================================================== */
@media (max-width: 980px) {
  .nav { display: none; }
  .menu-btn { display: grid; place-items: center; }
  .hero__grid, .passos-grid { grid-template-columns: 1fr; }
  .hero__arte { order: -1; }
  .flutua--um { left: 0.75rem; }
  .flutua--dois { right: 0.75rem; }
  .rodape__grid { grid-template-columns: 1fr 1fr; }
  .sumario { position: absolute; inset: 0 auto 0 0; z-index: 5; background: #14110f; box-shadow: var(--shadow); }
  .sumario.oculto { display: none; }
}

@media (max-width: 620px) {
  .busca input { width: 100%; }
  .busca { flex: 1 1 100%; }
  .biblio__topo { align-items: stretch; }
  .grade-livros { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 1rem; }
  .livro__capa-txt strong { font-size: 0.88rem; }
  .rodape__grid { grid-template-columns: 1fr; }
  .marca__nome { font-size: 1.1rem; }
  .pino span.rotulo { display: none; }
  .leitor__ctrl .grupo--medida { display: none; }
  .hero__stats { gap: 1.25rem; }
  .hero__stats strong { font-size: 1.4rem; }
}