/* ============================================
   ACERVO — Página de materiais
   ============================================ */

/* ---- CATEGORIAS ---- */
.acervo-cats {
  display: flex;
  gap: var(--sp-2);
  flex-wrap: wrap;
  padding-bottom: var(--sp-3);
  border-bottom: 1px solid var(--color-border);
}
.acervo-cat {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.35rem 0.9rem;
  border: 1px solid var(--color-border);
  border-radius: 2px;
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all 0.15s ease;
}
.acervo-cat:hover {
  border-color: var(--color-text);
  color: var(--color-text);
}
.acervo-cat.active {
  background: var(--color-text);
  color: var(--color-bg);
  border-color: var(--color-text);
}

/* FOTO NOS AVATARES — GERAL */
.autor-avatar-foto {
  object-fit: cover;
  object-position: center top;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-surface-2);
  flex-shrink: 0;
}

/* FOTO NOS AVATARES DOS CARDS */
.est-autor-foto {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center top;
  border: 1px solid var(--color-border);
  background: var(--color-surface-2);
  flex-shrink: 0;
}

/* ---- BADGE DE CATEGORIA NOS CARDS ---- */
.acervo-cat-badge {
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  border: 1px solid var(--color-border);
  border-radius: 2px;
  padding: 0.15rem 0.45rem;
}


/* ---- CONTROLES ---- */
.estudos-controls {
  padding: var(--sp-6) var(--sp-12);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  backdrop-filter: blur(12px);
}
@media (max-width: 768px) {
  .estudos-controls { padding: var(--sp-4) var(--sp-5); }
}

/* BUSCA */
.estudos-search-wrap {
  position: relative;
  display: flex;
  align-items: center;
}
.search-icon {
  position: absolute;
  left: var(--sp-4);
  color: var(--color-text-faint);
  pointer-events: none;
  flex-shrink: 0;
}
.estudos-search {
  width: 100%;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  padding: var(--sp-3) var(--sp-10) var(--sp-3) var(--sp-10);
  outline: none;
  transition: border-color var(--transition-interactive);
  box-sizing: border-box;
}
.estudos-search:focus { border-color: var(--color-text-muted); }
.estudos-search::placeholder { color: var(--color-text-faint); }
.search-clear {
  position: absolute;
  right: var(--sp-4);
  color: var(--color-text-faint);
  cursor: pointer;
  transition: color var(--transition-interactive);
  display: flex;
  align-items: center;
}
.search-clear:hover { color: var(--color-text-muted); }

.estudos-results-meta { padding-top: var(--sp-1); }
.estudos-results-meta .mono-tag {
  font-size: 0.62rem;
  letter-spacing: 0.07em;
  color: var(--color-text-faint);
}

/* ---- GRID DE CARDS ---- */
.estudos-view {
  padding: var(--sp-10) var(--sp-12);
}
@media (max-width: 768px) {
  .estudos-view { padding: var(--sp-6) var(--sp-5); }
}

.estudos-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--sp-5);
}
@media (max-width: 640px) {
  .estudos-grid { grid-template-columns: 1fr; }
}

/* CARD BASE */
.est-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition-interactive), transform var(--transition-interactive);
}
.est-card:hover {
  border-color: var(--color-text-faint);
  transform: translateY(-2px);
}
.est-card.hidden { display: none; }

/* MEDIA BLOCK */
.est-card-media {
  height: 100px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-5) var(--sp-5);
  position: relative;
  overflow: hidden;
}
.est-media-icon {
  color: var(--color-text-faint);
  flex-shrink: 0;
  z-index: 1;
}

/* ÁUDIO */
.est-audio {
  background: var(--color-surface-2);
  border-bottom: 1px solid var(--color-border);
}
.est-waveform {
  display: flex;
  align-items: center;
  gap: 3px;
  height: 40px;
  flex: 1;
  justify-content: flex-end;
}
.est-waveform span {
  display: block;
  width: 3px;
  background: var(--color-border);
  border-radius: 2px;
  animation: wave-est 1.4s ease-in-out infinite;
}
.est-waveform span:nth-child(1)  { height: 16px; animation-delay: 0s; }
.est-waveform span:nth-child(2)  { height: 28px; animation-delay: 0.1s; }
.est-waveform span:nth-child(3)  { height: 20px; animation-delay: 0.2s; }
.est-waveform span:nth-child(4)  { height: 36px; animation-delay: 0.3s; }
.est-waveform span:nth-child(5)  { height: 24px; animation-delay: 0.4s; }
.est-waveform span:nth-child(6)  { height: 32px; animation-delay: 0.5s; }
.est-waveform span:nth-child(7)  { height: 18px; animation-delay: 0.6s; }
.est-waveform span:nth-child(8)  { height: 30px; animation-delay: 0.7s; }
.est-waveform span:nth-child(9)  { height: 22px; animation-delay: 0.8s; }
.est-waveform span:nth-child(10) { height: 14px; animation-delay: 0.9s; }
@keyframes wave-est {
  0%, 100% { opacity: 0.25; transform: scaleY(1); }
  50% { opacity: 0.6; transform: scaleY(1.2); }
}
.est-card:hover .est-waveform span { background: var(--color-text-muted); }

/* E-BOOK */
.est-ebook {
  background: var(--color-surface-offset);
  border-bottom: 1px solid var(--color-border);
  justify-content: center;
}
.est-ebook-cover {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 80px;
  background: var(--color-text);
  color: var(--color-bg);
  border-radius: 2px;
  padding: var(--sp-2);
  box-shadow: 4px 4px 0 var(--color-border);
  text-align: center;
}
.est-ebook-label {
  font-family: var(--font-display);
  font-size: 0.55rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.est-ebook-sub {
  font-family: var(--font-mono);
  font-size: 0.5rem;
  letter-spacing: 0.04em;
  opacity: 0.6;
  margin-top: 2px;
}

/* VÍDEO */
.est-video {
  background: var(--color-surface-2);
  border-bottom: 1px solid var(--color-border);
}
.est-video-thumb {
  flex: 1;
  height: 80px;
  background: repeating-linear-gradient(
    45deg,
    var(--color-divider) 0px,
    var(--color-divider) 1px,
    transparent 1px,
    transparent 14px
  );
  border-radius: var(--radius-sm);
  margin-left: var(--sp-4);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.est-play-overlay {
  width: 36px;
  height: 36px;
  background: var(--color-text);
  color: var(--color-bg);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.4;
  transition: opacity var(--transition-interactive);
}
.est-card:hover .est-play-overlay { opacity: 0.8; }

/* TEXTO */
.est-texto {
  background: var(--color-surface-2);
  border-bottom: 1px solid var(--color-border);
}
.est-text-lines {
  display: flex;
  flex-direction: column;
  gap: 7px;
  flex: 1;
  margin-left: var(--sp-5);
}
.est-text-lines span {
  height: 2px;
  background: var(--color-border);
  border-radius: 1px;
}
.est-text-lines span:nth-child(1) { width: 80%; }
.est-text-lines span:nth-child(2) { width: 100%; }
.est-text-lines span:nth-child(3) { width: 65%; }
.est-text-lines span:nth-child(4) { width: 90%; }
.est-card:hover .est-text-lines span { background: var(--color-text-faint); }

/* CARD BODY */
.est-card-body {
  padding: var(--sp-5);
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  flex: 1;
}
.est-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-2);
}

/* BADGES */
.est-badge {
  font-size: 0.58rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 2px var(--sp-2);
  border-radius: 2px;
  border: 1px solid;
}
.est-badge-audio  { color: var(--color-text-faint); border-color: var(--color-border); }
.est-badge-ebook  { color: var(--color-text-faint); border-color: var(--color-border); }
.est-badge-video  { color: var(--color-text-faint); border-color: var(--color-border); }
.est-badge-texto  { color: var(--color-text-faint); border-color: var(--color-border); }
.est-duration {
  font-size: 0.62rem;
  letter-spacing: 0.05em;
  color: var(--color-text-faint);
}
.est-title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--color-text);
  line-height: 1.3;
  margin: 0;
}
.est-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin: 0;
  flex: 1;
}
.est-autor {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding-top: var(--sp-2);
  border-top: 1px solid var(--color-divider);
}
.est-autor-avatar {
  width: 24px;
  height: 24px;
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 0.5rem;
  letter-spacing: 0.02em;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.est-autor-name {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-weight: 500;
  flex: 1;
}
.est-year {
  font-size: 0.6rem;
  letter-spacing: 0.07em;
  color: var(--color-text-faint);
}
.est-actions {
  display: flex;
  gap: var(--sp-2);
}

/* EMPTY STATE */
.est-empty {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-4);
  padding: var(--sp-16) var(--sp-8);
  color: var(--color-text-faint);
  text-align: center;
}
.est-empty p {
  font-size: var(--text-sm);
  color: var(--color-text-faint);
}

/* ---- MOBILE GLOBAL ---- */
@media (max-width: 768px) {
  .sidebar { display: none; }
  .main-content { margin-left: 0 !important; padding-top: 58px !important; }
  .mobile-topbar { display: flex !important; }
  .theme-toggle-float { display: none; }
}

/* ---- SEÇÃO LIVROS ---- */
.livros-section {
  padding: 3rem 4rem 2.5rem;
  border-bottom: 1px solid var(--color-border);
}
.livros-header { margin-bottom: 2rem; }
.livros-eyebrow {
  display: inline-block;
  color: var(--color-text-muted);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}
.livros-titulo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin: 0 0 0.4rem;
}
.livros-desc {
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin: 0;
}
.livros-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
.livro-card {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}
.livro-capa-wrap {
  position: relative;
  border-radius: 6px;
  overflow: hidden;
  aspect-ratio: 3/4;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}
.livro-capa {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}
.livro-card:hover .livro-capa { transform: scale(1.03); }
.livro-badge {
  position: absolute;
  top: 0.65rem;
  right: 0.65rem;
  background: var(--color-bg);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 0.2rem 0.5rem;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.livro-info { display: flex; flex-direction: column; gap: 0.25rem; }
.livro-nome {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--color-text);
  margin: 0;
}
.livro-vol { font-size: 0.72rem; color: var(--color-text-muted); letter-spacing: 0.06em; }

@media (max-width: 768px) {
  .livros-section { padding: 2rem 1.25rem 1.5rem; }
  .livros-grid { gap: 1rem; }
}
@media (max-width: 480px) {
  .livros-grid { grid-template-columns: 1fr; gap: 1.5rem; }
}