/* ==============================================================================
   Tachibana Hub - Estilos da Aplicação
   Construído sobre o Design System Tachibana CSS (v0.2.1)
   Brutalismo Utilitário, Geometria Ortogonal & WCAG 2.1 AA
   ============================================================================== */

@layer components {
  /* ==============================================================================
     Layout Estrutural
     ============================================================================== */
  .app-shell {
    max-width: 1140px;
    margin-inline: auto;
    padding-block: 40px 64px;
    padding-inline: 24px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
  }

  .app-main {
    flex: 1;
  }

  /* ==============================================================================
     Cabeçalho e Identidade do Hub
     ============================================================================== */
  .app-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 24px;
    padding-block-end: 32px;
    border-block-end: 1px solid var(--tc-border-base);
    margin-block-end: 36px;
  }

  .header-brand {
    display: flex;
    flex-direction: column;
    gap: 4px;
  }

  .brand-status {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--tc-font-mono);
    font-size: 0.78rem;
    color: var(--tc-text-muted);
    letter-spacing: 0.04em;
    text-transform: uppercase;
    margin-block-end: 6px;
  }

  /* Indicador Analógico de Estado (Zero Border-Radius / Zero Neon) */
  .status-dot {
    width: 8px;
    height: 8px;
    background-color: var(--tc-emerald);
    display: inline-block;
    flex-shrink: 0;
  }

  .brand-title {
    font-size: clamp(1.75rem, 3.5vw, 2.25rem);
    font-weight: 700;
    color: var(--tc-text-main);
    letter-spacing: -0.03em;
    line-height: 1.2;
    margin-block-end: 6px;
  }

  .brand-subtitle {
    font-size: 0.95rem;
    color: var(--tc-text-muted);
    max-width: 620px;
    line-height: 1.6;
  }

  /* Botão de Rede Social (GitHub) com Alta Affordance */
  .btn-social {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background-color: var(--tc-bg-surface-2);
    border: 1px solid var(--tc-border-contrast);
    padding-block: 8px;
    padding-inline: 14px;
    color: var(--tc-text-main);
    text-decoration: none;
    font-family: var(--tc-font-mono);
    font-size: 0.82rem;
    letter-spacing: 0.02em;
    cursor: pointer;
    transition: background-color 0.12s ease, border-color 0.12s ease, filter 0.12s ease;
    white-space: nowrap;
    user-select: none;
  }

  .btn-social:hover {
    background-color: var(--tc-bg-surface-hover);
    border-color: var(--tc-border-focus);
    filter: brightness(1.12);
  }

  .btn-social:active {
    transform: translateY(1px);
    filter: brightness(0.95);
  }

  .btn-social:focus-visible {
    outline: 2px solid var(--tc-border-focus);
    outline-offset: 2px;
  }

  .social-icon svg {
    width: 16px;
    height: 16px;
    display: block;
  }

  .external-icon svg {
    width: 12px;
    height: 12px;
    display: block;
    color: var(--tc-text-dim);
  }

  /* ==============================================================================
     Painel de Controles (Busca & Filtros de Categoria)
     ============================================================================== */
  .controls-panel {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-block-end: 32px;
  }

  .search-box {
    position: relative;
    display: flex;
    align-items: center;
    width: 100%;
  }

  .search-icon {
    position: absolute;
    left: 14px;
    pointer-events: none;
    color: var(--tc-text-dim);
    display: flex;
    align-items: center;
  }

  .search-icon svg {
    width: 16px;
    height: 16px;
  }

  .search-input {
    width: 100%;
    background-color: var(--tc-bg-base);
    border: 1px solid var(--tc-border-base);
    padding-block: 10px;
    padding-inline: 42px 40px;
    font-family: var(--tc-font-sans);
    font-size: 0.875rem;
    color: var(--tc-text-main);
    outline: none;
    transition: border-color 0.12s ease;
  }

  .search-input::placeholder {
    color: var(--tc-text-dim);
  }

  .search-input:hover {
    border-color: var(--tc-border-contrast);
  }

  .search-input:focus {
    border-color: var(--tc-border-focus);
  }

  .search-input:focus-visible {
    outline: 2px solid var(--tc-border-focus);
    outline-offset: 1px;
  }

  .search-clear {
    position: absolute;
    right: 12px;
    background: none;
    border: none;
    color: var(--tc-text-muted);
    cursor: pointer;
    padding: 6px;
    display: flex;
    align-items: center;
    transition: color 0.12s ease;
  }

  .search-clear:hover {
    color: var(--tc-text-main);
  }

  .search-clear svg {
    width: 14px;
    height: 14px;
  }

  /* Tabs de Categoria com Alta Affordance */
  .category-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
  }

  .tab-btn {
    background-color: var(--tc-bg-surface-2);
    border: 1px solid var(--tc-border-contrast);
    padding-block: 7px;
    padding-inline: 14px;
    color: var(--tc-text-muted);
    font-family: var(--tc-font-mono);
    font-size: 0.80rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    cursor: pointer;
    transition: background-color 0.12s ease, border-color 0.12s ease, color 0.12s ease;
    user-select: none;
  }

  .tab-btn:hover {
    color: var(--tc-text-main);
    border-color: var(--tc-border-focus);
    background-color: var(--tc-bg-surface-hover);
    filter: brightness(1.1);
  }

  .tab-btn:focus-visible {
    outline: 2px solid var(--tc-border-focus);
    outline-offset: 2px;
  }

  /* Aba Ativa (Padrão Primário Sólido Tachibana) */
  .tab-btn-active {
    background-color: var(--tc-amber);
    color: #0a0c10;
    font-weight: 600;
    border-color: var(--tc-amber);
  }

  .tab-btn-active:hover {
    background-color: color-mix(in srgb, var(--tc-amber) 88%, #ffffff);
    border-color: color-mix(in srgb, var(--tc-amber) 88%, #ffffff);
    color: #0a0c10;
    filter: none;
  }

  .filter-meta {
    display: flex;
    justify-content: flex-end;
    font-family: var(--tc-font-mono);
    font-size: 0.78rem;
    color: var(--tc-text-dim);
    letter-spacing: 0.02em;
  }

  /* ==============================================================================
     Grid de Serviços (Padrão Zettelkasten / Cartões de Informação Densa)
     ============================================================================== */
  .services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
  }

  .service-card {
    background-color: var(--tc-bg-surface-1);
    border: 1px solid var(--tc-border-base);
    padding: 20px;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 14px;
    transition: border-color 0.12s ease, background-color 0.12s ease, transform 0.12s ease;
    cursor: pointer;
  }

  .service-card:hover {
    border-color: var(--tc-border-contrast);
    background-color: var(--tc-bg-surface-2);
    transform: translateY(-1px);
  }

  .service-card:focus-visible {
    outline: 2px solid var(--tc-border-focus);
    outline-offset: 2px;
  }

  .card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-block-end: 1px dashed var(--tc-border-base);
    padding-block-end: 10px;
  }

  .card-icon svg {
    width: 22px;
    height: 22px;
    color: var(--tc-amber);
    display: block;
  }

  /* Tag Técnica do Serviço */
  .card-tag {
    font-family: var(--tc-font-mono);
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--tc-amber);
    background-color: var(--tc-amber-bg);
    border: 1px solid var(--tc-amber-border);
    padding-block: 2px;
    padding-inline: 8px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
  }

  .card-body {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
  }

  .card-title {
    font-size: 1.10rem;
    font-weight: 600;
    color: var(--tc-text-main);
    letter-spacing: -0.01em;
    line-height: 1.3;
  }

  .card-desc {
    font-size: 0.875rem;
    color: var(--tc-text-muted);
    line-height: 1.6;
  }

  /* Rodapé do Cartão */
  .card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-block-start: 10px;
    border-block-start: 1px solid var(--tc-border-muted);
    font-family: var(--tc-font-mono);
    font-size: 0.78rem;
    color: var(--tc-text-dim);
  }

  .card-domain {
    color: var(--tc-text-dim);
  }

  .card-arrow svg {
    width: 14px;
    height: 14px;
    color: var(--tc-text-dim);
    display: block;
    transition: transform 0.12s ease, color 0.12s ease;
  }

  .service-card:hover .card-arrow svg {
    color: var(--tc-amber);
    transform: translate(2px, -2px);
  }

  /* ==============================================================================
     Estado Vazio (Nenhum Resultado)
     ============================================================================== */
  .empty-state {
    padding-block: 56px;
    padding-inline: 24px;
    text-align: center;
    background-color: var(--tc-bg-surface-1);
    border: 1px dashed var(--tc-border-base);
    margin-block-start: 12px;
  }

  .empty-title {
    font-size: 1.10rem;
    font-weight: 600;
    color: var(--tc-text-main);
    margin-block-end: 8px;
  }

  .empty-desc {
    font-size: 0.875rem;
    color: var(--tc-text-muted);
    margin-block-end: 20px;
    line-height: 1.6;
  }

  .btn-reset {
    background-color: var(--tc-bg-surface-2);
    border: 1px solid var(--tc-border-contrast);
    padding-block: 8px;
    padding-inline: 16px;
    color: var(--tc-text-main);
    font-family: var(--tc-font-mono);
    font-size: 0.82rem;
    cursor: pointer;
    transition: background-color 0.12s ease, border-color 0.12s ease, filter 0.12s ease;
  }

  .btn-reset:hover {
    border-color: var(--tc-amber);
    color: var(--tc-amber);
    background-color: var(--tc-bg-surface-hover);
  }

  /* ==============================================================================
     Rodapé
     ============================================================================== */
  .app-footer {
    padding-block-start: 48px;
    border-block-start: 1px solid var(--tc-border-base);
    margin-block-start: 48px;
  }

  .footer-inner {
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: 0.78rem;
    color: var(--tc-text-dim);
    line-height: 1.6;
  }

  .footer-copy, .footer-tech {
    font-family: var(--tc-font-mono);
  }

  /* ==============================================================================
     Responsividade
     ============================================================================== */
  @media (max-width: 768px) {
    .app-shell {
      padding-block: 24px 44px;
      padding-inline: 16px;
    }

    .app-header {
      flex-direction: column;
      align-items: stretch;
      gap: 20px;
    }

    .btn-social {
      align-self: flex-start;
    }

    .services-grid {
      grid-template-columns: 1fr;
      gap: 16px;
    }
  }
}