/* ============================================
   DESIGN TOKENS
   ============================================ */
:root {
  --bg: #E3DED2;        /* warm stone — page background */
  --paper: #F6F3EA;     /* lighter parchment — cards */
  --ink: #251F2B;        /* deep indigo-black — text */
  --ink-soft: #524A5C;   /* softened ink — secondary text */
  --gold: #96742F;       /* aged brass — primary accent */
  --gold-soft: #C9AD73;  /* lighter gold — hover states */
  --plum: #574764;       /* muted plum — secondary accent */
  --line: rgba(37, 31, 43, 0.14);

  --font-display: 'Fraunces', serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  --max-w: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* subtle paper grain, purely decorative */
.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode: multiply;
}

a { color: inherit; }

h1, h2, h3 { font-family: var(--font-display); font-weight: 500; margin: 0; }

em { font-style: italic; color: var(--gold); }

p { margin: 0 0 1em; }

/* ============================================
   LAYOUT HELPERS
   ============================================ */
.site-header, main > section, .site-footer {
  max-width: var(--max-w);
  margin: 0 auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

section { padding-top: 6rem; padding-bottom: 6rem; }

.section-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  line-height: 1.25;
  max-width: 32ch;
  margin-bottom: 1.25rem;
}

.section-hint { color: var(--ink-soft); max-width: 42ch; }

/* ============================================
   HEADER
   ============================================ */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 2rem;
  padding-bottom: 2rem;
  position: sticky;
  top: 0;
  z-index: 10;
  background: linear-gradient(var(--bg) 70%, transparent);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
  text-decoration: none;
  color: var(--ink);
}
.brand-photo {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--line);
}

.site-nav { display: flex; gap: 2rem; font-size: 0.92rem; }
.site-nav a { text-decoration: none; color: var(--ink-soft); border-bottom: 1px solid transparent; transition: color 0.2s, border-color 0.2s; }
.site-nav a:hover { color: var(--ink); border-color: var(--gold); }

/* ============================================
   HERO
   ============================================ */
.hero { padding-top: 4rem; padding-bottom: 5rem; }
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--plum);
  margin-bottom: 1.25rem;
}
.hero-title {
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  line-height: 1.08;
  letter-spacing: -0.01em;
  max-width: 16ch;
  margin-bottom: 1.5rem;
}
.hero-sub {
  max-width: 46ch;
  font-size: 1.05rem;
  color: var(--ink-soft);
  margin-bottom: 2.25rem;
}

.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.92rem;
  padding: 0.85rem 1.6rem;
  border-radius: 2px;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.2s ease, color 0.2s ease;
}
.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { background: var(--gold); transform: translateY(-1px); }

.btn-secondary { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-secondary:hover { border-color: var(--gold); color: var(--gold); transform: translateY(-1px); }

/* ============================================
   TEASER (próximo lançamento — secreto)
   ============================================ */
.teaser {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  padding-top: 2.5rem;
  padding-bottom: 2.5rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.teaser-seal {
  flex: 0 0 auto;
  width: 52px;
  height: 52px;
  color: var(--gold);
  animation: pulse-seal 3.5s ease-in-out infinite;
}
.teaser-seal svg { width: 100%; height: 100%; }

@keyframes pulse-seal {
  0%, 100% { opacity: 0.75; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.06); }
}
.teaser-cover {
  flex: 0 0 auto;
  width: 90px;
  height: 135px;
  border-radius: 3px;
  overflow: hidden;
  box-shadow: 0 12px 24px -12px rgba(37,31,43,0.45);
}
.teaser-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.teaser-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gold);
  margin-bottom: 0.4rem;
}

.teaser-title {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  line-height: 1.4;
  color: var(--ink);
  margin-bottom: 0.4rem;
}
.teaser-synopsis {
  font-family: var(--font-body);
  font-size: 0.92rem;
  color: var(--ink-soft);
  max-width: 48ch;
  margin-bottom: 0.6rem;
}
.teaser-countdown {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--ink-soft);
  margin: 0;
}

@media (prefers-reduced-motion: reduce) {
  .teaser-seal { animation: none; }
}

@media (max-width: 600px) {
  .teaser { flex-wrap: wrap; gap: 1.1rem; }
  .teaser-seal { width: 40px; height: 40px; }
  .teaser-cover { width: 64px; height: 96px; }
}

/* ============================================
   ESTANTE (signature element)
   ============================================ */
.estante { border-top: 1px solid var(--line); }

.shelf {
  display: flex;
  align-items: flex-end;
  gap: 0.6rem;
  margin-top: 3.5rem;
  padding-top: 1.5rem;
  padding-bottom: 1.25rem;
  border-bottom: 10px solid var(--ink);
  overflow-x: auto;
  overflow-y: visible;
}

.spine {
  flex: 0 0 auto;
  height: 260px;
  width: 56px;
  border-radius: 3px 3px 0 0;
  cursor: pointer;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 1rem;
  border: 1px solid rgba(0,0,0,0.08);
  box-shadow: inset -6px 0 10px -8px rgba(0,0,0,0.4);
  transition: transform 0.25s ease, height 0.25s ease, box-shadow 0.25s ease;
  position: relative;
}
.spine:hover, .spine:focus-visible { transform: translateY(-10px); box-shadow: 0 10px 18px -10px rgba(37,31,43,0.5); }
.spine.active { transform: translateY(-14px); }

.spine-label {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--paper);
  letter-spacing: 0.02em;
  white-space: nowrap;
  max-height: 220px;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Selos na lombada: "Comece aqui" / "Favorito das leitoras" */
.spine-badge {
  position: absolute;
  top: -24px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 0.56rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 3px 7px;
  border-radius: 2px;
  white-space: nowrap;
  color: var(--paper);
  pointer-events: none;
}
.spine-badge--start { background: var(--gold); }
.spine-badge--favorite { background: var(--plum); }

.book-detail {
  margin-top: 2.5rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 2.5rem;
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 2rem;
  position: relative;
  animation: rise 0.3s ease;
}
.book-detail[hidden] { display: none; }
@keyframes rise { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

.detail-cover {
  width: 160px;
  height: 240px;
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--paper);
  font-family: var(--font-display);
  font-style: italic;
  text-align: center;
  padding: 1rem;
  font-size: 0.95rem;
  box-shadow: 0 12px 24px -12px rgba(37,31,43,0.45);
}

.detail-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 3px;
}
.detail-series {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--plum);
  margin-bottom: 0.4rem;
}
.detail-title { font-size: 1.6rem; margin-bottom: 0.6rem; }

/* Prova social: nota e depoimento */
.detail-rating {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--gold);
  margin-bottom: 0.9rem;
}
.detail-rating:empty { display: none; margin-bottom: 0; }
.detail-rating .stars { letter-spacing: 1px; }

.detail-synopsis { color: var(--ink-soft); margin-bottom: 1.25rem; }

.detail-testimonial {
  margin: 0 0 1.5rem;
  padding-left: 1rem;
  border-left: 2px solid var(--gold-soft);
  font-style: italic;
  font-size: 0.92rem;
  color: var(--ink-soft);
}
.detail-testimonial:empty { display: none; margin-bottom: 0; border: none; padding: 0; }
.detail-testimonial cite {
  display: block;
  margin-top: 0.4rem;
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--plum);
}

.detail-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }

.detail-close {
  position: absolute;
  top: 1rem; right: 1rem;
  width: 32px; height: 32px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: transparent;
  font-size: 1.2rem;
  line-height: 1;
  cursor: pointer;
  color: var(--ink-soft);
}
.detail-close:hover { background: var(--ink); color: var(--paper); }

/* ============================================
   AUTORA
   ============================================ */
.autora {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 3rem;
  align-items: start;
  border-top: 1px solid var(--line);
}
.autora-portrait img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 50%;
  border: 1px solid var(--line);
  box-shadow: 0 16px 32px -18px rgba(37,31,43,0.45);
}
.autora-text p { max-width: 60ch; color: var(--ink-soft); }
.autora-text p strong { color: var(--ink); }

/* ============================================
   CONTATO
   ============================================ */
.contato { border-top: 1px solid var(--line); }
.newsletter-form {
  display: flex;
  gap: 0.75rem;
  max-width: 440px;
  margin-bottom: 0.75rem;
}
.newsletter-form input {
  flex: 1;
  padding: 0.85rem 1rem;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: var(--paper);
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--ink);
}
.newsletter-form input:focus { outline: 2px solid var(--gold); outline-offset: 1px; }
.form-note { font-size: 0.85rem; color: var(--plum); min-height: 1.2em; }

.social-row { display: flex; gap: 1.5rem; margin-top: 2rem; }
.social-row a { text-decoration: none; font-size: 0.9rem; color: var(--ink-soft); border-bottom: 1px solid var(--line); padding-bottom: 2px; }
.social-row a:hover { color: var(--gold); border-color: var(--gold); }

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
  display: flex;
  justify-content: space-between;
  padding-top: 2.5rem;
  padding-bottom: 2.5rem;
  font-size: 0.82rem;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
}

/* ============================================
   CTA FIXO (mobile) — aparece quando um livro está aberto
   ============================================ */
.sticky-cta { display: none; }

@media (max-width: 760px) {
  .sticky-cta:not([hidden]) {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--paper);
    border-top: 1px solid var(--line);
    padding: 0.85rem 1.25rem;
    z-index: 50;
    box-shadow: 0 -8px 20px -12px rgba(37,31,43,0.35);
  }
  .sticky-cta-title {
    font-family: var(--font-display);
    font-style: italic;
    font-size: 0.9rem;
    color: var(--ink);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .sticky-cta .btn { flex-shrink: 0; padding: 0.6rem 1.1rem; font-size: 0.85rem; }
  body.has-sticky-cta { padding-bottom: 68px; }
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 760px) {
  .autora { grid-template-columns: 1fr; }
  .autora-portrait { width: 120px; }
  .book-detail { grid-template-columns: 1fr; }
  .detail-cover { width: 120px; height: 180px; }
  .site-nav { gap: 1.1rem; font-size: 0.85rem; }
  .newsletter-form { flex-direction: column; }
  .site-footer { flex-direction: column; gap: 0.4rem; }
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .spine, .btn, .book-detail { transition: none; animation: none; }
}

/* Visible keyboard focus */
a:focus-visible, button:focus-visible, .spine:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}