/**
 * ===============================================================================
 * ARQUIVO: app/static/css/busca.css
 * CAMADA: Estilização / Interface de Busca Avançada
 * PAPEL NO SISTEMA:
 *   - Estilos dedicados da página de busca avançada no acervo (busca.html).
 *   - Harmonizado com a paleta de baixo contraste (tokens.css) e Pico CSS v2.
 *   - Componentes:
 *       * Hero de busca com caixa de entrada de alto destaque e atalhos de teclado.
 *       * Painel de filtros retrátil com chips interativos de vestibulares e anos.
 *       * Modos de pesquisa da língua portuguesa (acentuação flexível, exata/todas).
 *       * Métricas da busca (tempo de resposta em ms, ocorrências, total de provas).
 *       * Cards de resultados com destaque (<mark>) nos trechos e link direto para a página.
 * ===============================================================================
 */

/* =============================== HEADER / NAV =============================== */
.search-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg-elev);
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(12px);
}

.search-nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.search-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-strong);
}

.search-brand:hover {
  text-decoration: none;
  color: var(--text-strong);
}

.search-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid var(--accent-line);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-xs);
  font-size: 0.76rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

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

/* =============================== LAYOUT PRINCIPAL =============================== */
.search-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

/* =============================== HERO DE BUSCA =============================== */
.search-hero {
  text-align: center;
  margin-bottom: 2rem;
}

.search-hero-title {
  font-size: 2.1rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text-strong);
  margin-bottom: 0.4rem;
}

.search-hero-sub {
  color: var(--muted);
  font-size: 1rem;
  max-width: 680px;
  margin: 0 auto 1.5rem;
  line-height: 1.5;
}

.search-form {
  max-width: 840px;
  margin: 0 auto;
  width: 100%;
}

.search-main-box {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 0.35rem 0.45rem 0.35rem 1.1rem;
  box-shadow: var(--shadow);
  min-height: 56px;
  box-sizing: border-box;
  transition: border-color var(--fast) var(--ease), box-shadow var(--fast) var(--ease), background var(--fast) var(--ease);
}

.search-main-box:focus-within {
  border-color: var(--accent-line);
  background: var(--surface-2);
  box-shadow: 0 0 0 3px var(--accent-softer), var(--shadow);
}

.search-icon-hero {
  color: var(--muted);
  width: 20px;
  height: 20px;
  margin: 0;
  flex-shrink: 0;
  transition: color var(--fast) var(--ease);
}

.search-main-box:focus-within .search-icon-hero {
  color: var(--accent);
}

.search-input-hero {
  appearance: none;
  -webkit-appearance: none;
  flex: 1 1 auto;
  min-width: 0;
  width: 100%;
  height: 44px;
  margin: 0 !important;
  padding: 0 0.4rem !important;
  background: transparent !important;
  background-image: none !important;
  border: none !important;
  box-shadow: none !important;
  outline: none !important;
  font-family: inherit;
  font-size: 1.05rem;
  font-weight: 400;
  color: var(--text-strong);
  box-sizing: border-box;
}

.search-input-hero::placeholder {
  color: var(--faint);
  font-size: 0.95rem;
}

.search-input-hero::-webkit-search-decoration,
.search-input-hero::-webkit-search-cancel-button,
.search-input-hero::-webkit-search-results-button,
.search-input-hero::-webkit-search-results-decoration {
  display: none;
  -webkit-appearance: none;
}

.search-kbd-hero {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  height: 26px;
  padding: 0 0.55rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.74rem;
  font-family: var(--mono);
  border-radius: var(--radius-xs);
  user-select: none;
  pointer-events: none;
}

.btn-search-hero {
  all: unset;
  box-sizing: border-box;
  flex-shrink: 0 !important;
  width: auto !important;
  height: 44px !important;
  margin: 0 !important;
  padding: 0 1.4rem !important;
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  gap: 0.5rem;
  border-radius: var(--radius-sm) !important;
  border: 1px solid var(--accent-line) !important;
  background: var(--accent-soft) !important;
  color: var(--accent) !important;
  font-size: 0.92rem !important;
  font-weight: 600 !important;
  cursor: pointer;
  user-select: none;
  transition: background var(--fast) var(--ease), color var(--fast) var(--ease),
    border-color var(--fast) var(--ease), transform var(--fast) var(--ease);
}

.btn-search-hero:hover {
  background: rgba(143, 179, 166, 0.22) !important;
  border-color: var(--accent) !important;
  color: var(--text-strong) !important;
}

.btn-search-hero:focus-visible {
  outline: 2px solid var(--accent-line);
  outline-offset: 2px;
}

.btn-search-hero:active {
  transform: translateY(1px);
}

/* =============================== PAINEL DE FILTROS =============================== */
.filters-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-sm);
}

.filter-section {
  margin-bottom: 1.25rem;
}

.filter-section:last-child {
  margin-bottom: 0;
}

.filter-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.65rem;
}

.filter-title {
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin: 0;
}

.filter-quick-actions {
  display: flex;
  gap: 0.4rem;
}

.filter-action-link {
  all: unset;
  cursor: pointer;
  font-size: 0.78rem;
  color: var(--accent);
  padding: 0.1rem 0.4rem;
  border-radius: var(--radius-xs);
}

.filter-action-link:hover {
  background: var(--accent-softer);
  text-decoration: underline;
}

/* Chips de Vestibulares */
.chips-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.vest-chip {
  all: unset;
  cursor: pointer;
  box-sizing: border-box;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.8rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text);
  user-select: none;
  transition: background var(--fast) var(--ease), border-color var(--fast) var(--ease),
    color var(--fast) var(--ease), transform var(--fast) var(--ease);
}

.vest-chip:hover {
  background: var(--surface-hover);
  border-color: var(--border-strong);
  color: var(--text-strong);
}

.vest-chip.is-active {
  background: var(--accent-soft);
  border-color: var(--accent-line);
  color: var(--accent);
}

.vest-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c, var(--accent));
  flex-shrink: 0;
}

.vest-count {
  font-size: 0.74rem;
  color: var(--faint);
  font-family: var(--mono);
}

.vest-chip.is-active .vest-count {
  color: var(--accent);
  opacity: 0.8;
}

/* Seletor de Anos */
.years-row {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.years-presets {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.preset-chip {
  all: unset;
  cursor: pointer;
  padding: 0.25rem 0.65rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  font-size: 0.78rem;
  color: var(--muted);
  transition: all var(--fast) var(--ease);
}

.preset-chip:hover {
  border-color: var(--border-strong);
  color: var(--text);
}

.preset-chip.is-active {
  background: var(--surface-hover);
  border-color: var(--accent-line);
  color: var(--accent);
  font-weight: 500;
}

.years-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  max-height: 140px;
  overflow-y: auto;
  padding: 0.25rem 0;
}

.year-chip {
  all: unset;
  cursor: pointer;
  padding: 0.25rem 0.55rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  font-size: 0.78rem;
  font-family: var(--mono);
  color: var(--muted);
  user-select: none;
  transition: all var(--fast) var(--ease);
}

.year-chip:hover {
  color: var(--text);
  border-color: var(--border-strong);
}

.year-chip.is-active {
  background: var(--accent-soft);
  border-color: var(--accent-line);
  color: var(--accent);
  font-weight: 600;
}

/* Opções de Idioma Português e Modo de Busca */
.options-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 250px), 1fr));
  gap: 1.2rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
}

.option-group-title {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin-bottom: 0.5rem;
}

.mode-segmented {
  display: flex;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 3px;
  gap: 3px;
}

.mode-segmented label {
  flex: 1;
  text-align: center;
  margin: 0;
  cursor: pointer;
}

.mode-segmented input {
  display: none;
}

.mode-segmented span {
  display: block;
  padding: 0.35rem 0.6rem;
  font-size: 0.8rem;
  border-radius: var(--radius-xs);
  color: var(--muted);
  user-select: none;
  transition: all var(--fast) var(--ease);
}

.mode-segmented input:checked + span {
  background: var(--surface-hover);
  color: var(--text-strong);
  font-weight: 500;
  box-shadow: var(--shadow-sm);
}

.toggles-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.custom-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.84rem;
  color: var(--text);
  cursor: pointer;
  user-select: none;
  margin: 0;
}

.custom-toggle input {
  margin: 0;
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
}

.custom-toggle .toggle-hint {
  font-size: 0.74rem;
  color: var(--muted);
  display: block;
}

/* =============================== BARRA DE STATUS / RESUMO =============================== */
.search-status-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 1.5rem;
  font-size: 0.86rem;
  color: var(--muted);
}

.search-status-stats strong {
  color: var(--text-strong);
}

.search-status-time {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--accent);
  background: var(--accent-softer);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-xs);
}

/* Tags de distribuição por vestibular nos resultados */
.search-breakdown {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.5rem;
}

.breakdown-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.2rem 0.6rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  font-size: 0.76rem;
  color: var(--text);
}

.breakdown-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c, var(--accent));
}

.breakdown-badge {
  background: var(--surface-2);
  color: var(--accent);
  font-family: var(--mono);
  padding: 0 0.35rem;
  border-radius: 3px;
  font-size: 0.72rem;
}

/* =============================== CARDS DE RESULTADOS =============================== */
.results-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.result-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  transition: border-color var(--fast) var(--ease), box-shadow var(--fast) var(--ease),
    transform var(--fast) var(--ease);
  position: relative;
}

.result-card:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}

.result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
}

.result-badges {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.badge-vest {
  background: var(--accent-soft);
  border: 1px solid var(--accent-line);
  color: var(--accent);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-xs);
  font-size: 0.78rem;
  font-weight: 600;
}

.badge-ano {
  font-family: var(--mono);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--text-strong);
}

.badge-tipo {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-xs);
  font-size: 0.72rem;
  text-transform: capitalize;
}

.badge-fase {
  color: var(--faint);
  font-size: 0.75rem;
}

.badge-page {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: rgba(143, 179, 166, 0.12);
  color: var(--accent);
  border: 1px solid var(--accent-line);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  font-family: var(--mono);
  font-size: 0.8rem;
  font-weight: 600;
}

/* Snippets / Trechos */
.result-snippets {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin-bottom: 1.1rem;
}

.snippet-box {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-xs);
  padding: 0.75rem 1rem;
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--text);
  word-break: break-word;
}

/* Destaque com tag <mark> */
.snippet-box mark {
  background: rgba(143, 179, 166, 0.28);
  color: #ffffff;
  font-weight: 600;
  border-bottom: 2px solid var(--accent);
  padding: 0.08em 0.35em;
  border-radius: 3px;
  box-shadow: 0 0 8px rgba(143, 179, 166, 0.3);
}

/* Rodapé do Card com Ações */
.result-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
}

.result-file-info {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--faint);
  font-size: 0.78rem;
  font-family: var(--mono);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 480px;
}

.result-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-open-pdf {
  all: unset;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: var(--accent);
  color: #121517 !important;
  font-weight: 600 !important;
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  text-decoration: none !important;
  transition: filter var(--fast) var(--ease), transform var(--fast) var(--ease);
}

.btn-open-pdf:hover {
  filter: brightness(1.1);
  color: #121517 !important;
}

.btn-open-pdf:active {
  transform: translateY(1px);
}

/* =============================== ESTADOS VAZIOS / DICAS =============================== */
.search-empty-state {
  text-align: center;
  padding: 3.5rem 1.5rem;
  background: var(--surface);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius);
}

.empty-icon {
  width: 44px;
  height: 44px;
  color: var(--muted);
  margin-bottom: 1rem;
}

.empty-title {
  font-size: 1.15rem;
  color: var(--text-strong);
  margin-bottom: 0.4rem;
}

.empty-desc {
  color: var(--muted);
  font-size: 0.9rem;
  max-width: 520px;
  margin: 0 auto 1.5rem;
  line-height: 1.5;
}

.sample-queries {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
}

.sample-chip {
  all: unset;
  cursor: pointer;
  padding: 0.3rem 0.75rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--accent);
  font-size: 0.8rem;
  transition: all var(--fast) var(--ease);
}

.sample-chip:hover {
  background: var(--accent-softer);
  border-color: var(--accent-line);
}

/* Status do Índice */
.index-status-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--muted);
}

.index-status-info {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  min-width: 0;
}

.index-status-info svg {
  width: 16px;
  height: 16px;
  color: var(--accent);
  flex-shrink: 0;
}

/* Responsividade Mobile & Tablet */
@media (max-width: 768px) {
  .search-nav {
    padding: 0.75rem 1rem;
  }

  .search-container {
    padding: 1.25rem 1rem 3.5rem;
  }

  .search-hero {
    margin-bottom: 1.5rem;
  }

  .search-hero-title {
    font-size: clamp(1.45rem, 5vw, 1.8rem);
  }

  .search-hero-sub {
    font-size: 0.9rem;
    margin-bottom: 1.2rem;
  }

  .search-kbd-hero {
    display: none;
  }

  .search-main-box {
    padding-left: 0.85rem;
    gap: 0.5rem;
    min-height: 50px;
  }

  .btn-search-hero {
    height: 40px !important;
    padding: 0 1.1rem !important;
  }

  .filters-card {
    padding: 1rem 1.15rem;
    margin-bottom: 1.5rem;
  }

  .search-status-bar {
    flex-direction: column;
    align-items: flex-start;
  }

  .result-card {
    padding: 1.1rem 1rem;
  }

  .result-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .result-footer {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
  }

  .result-file-info {
    max-width: 100%;
    font-size: 0.74rem;
  }

  .btn-open-pdf {
    width: 100%;
    justify-content: center;
    height: 40px;
  }
}

@media (max-width: 560px) {
  .search-badge {
    display: none;
  }

  .nav-links .btn {
    padding: 0;
    width: 38px;
    height: 38px;
    justify-content: center;
  }

  .nav-links .btn span {
    display: none;
  }

  .index-status-card {
    flex-direction: column;
    align-items: stretch;
  }

  .index-status-card .btn {
    width: 100%;
    justify-content: center;
  }

  .filter-header-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.35rem;
  }

  .filter-quick-actions {
    margin-bottom: 0.2rem;
  }
}