/* ==========================================================================
   VerdeVeste - Estilos da Página de Certificações
   ========================================================================== */

:root {
    --primary-green: #295236;
    --primary-light-green: #5FB8A9;
    --primary-blue: #85CDDD;
    --dark-blue: #33617A;
    --bg-page: #F5F5F5;
    --card-bg: #FFFFFF;
    --text-primary: #0E0E0E;
    --text-secondary: #555555;
    --text-muted: #888888;
    --border-light: rgba(0, 0, 0, 0.07);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.07);
    --shadow-hover: 0 16px 36px rgba(41, 82, 53, 0.14);
    --transition-smooth: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Estrutura Base */
body.certifications-page {
    background-color: var(--bg-page);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-family: 'Work Sans', sans-serif;
    color: var(--text-primary);
    overflow-x: hidden;
}

/* Espaçador para compensar o header fixo */
.certifications-main {
    flex: 1;
    padding-top: 100px;
    padding-bottom: 70px;
}

.certifications-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Barra de Navegação Superior / Voltar */
.top-action-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    padding-top: 10px;
}

.btn-back-home {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 18px;
    background: #FFFFFF;
    color: var(--primary-green);
    border: 1px solid rgba(41, 82, 53, 0.2);
    border-radius: 999px;
    font-size: 0.88rem;
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-sm);
}

.btn-back-home svg {
    width: 16px;
    height: 16px;
    transition: transform 0.2s ease;
}

.btn-back-home:hover {
    background: var(--primary-green);
    color: #FFFFFF;
    border-color: var(--primary-green);
    box-shadow: 0 4px 12px rgba(41, 82, 53, 0.2);
    transform: translateX(-3px);
}

.btn-back-home:hover svg path {
    stroke: #FFFFFF;
}

/* Cabeçalho da Página */
.page-header {
    margin-bottom: 40px;
    text-align: left;
}

.page-header .category-tag {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--primary-green);
    margin-bottom: 8px;
    background: rgba(41, 82, 53, 0.08);
    padding: 4px 12px;
    border-radius: 6px;
}

.page-header h1 {
    font-size: clamp(2rem, 1.4rem + 2vw, 2.75rem);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 12px 0;
    letter-spacing: -0.02em;
    line-height: 1.15;
}

.page-header p {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 680px;
    line-height: 1.55;
    margin: 0;
}

/* Grid de 4 Colunas */
.certifications-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 28px;
    width: 100%;
}

/* Responsividade do Grid */
@media (max-width: 1200px) {
    .certifications-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 22px;
    }
}

@media (max-width: 860px) {
    .certifications-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .certifications-main {
        padding-top: 85px;
    }
}

@media (max-width: 540px) {
    .certifications-grid {
        grid-template-columns: 1fr;
        gap: 18px;
    }
    
    .certifications-container {
        padding: 0 16px;
    }
}

/* Card de Certificação */
.certification-card {
    background: var(--card-bg);
    border-radius: 16px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
    position: relative;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
}

.certification-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(41, 82, 53, 0.25);
}

/* Área de Thumbnail do Documento */
.card-thumbnail-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 1 / 1.28;
    background: linear-gradient(145deg, #f0f2f1 0%, #e8ece9 100%);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

/* Efeito folha de papel */
.card-sheet {
    width: 86%;
    height: 90%;
    background: #FFFFFF;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.09), 0 1px 3px rgba(0, 0, 0, 0.05);
    border-radius: 4px;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease;
}

.certification-card:hover .card-sheet {
    transform: scale(1.02);
}

/* Canvas ou Imagem de Preview gerada */
.card-preview-canvas,
.card-preview-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.card-preview-canvas.loaded,
.card-preview-img.loaded {
    opacity: 1;
}

/* Skeleton Loading para o Thumbnail */
.card-skeleton {
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, #f0f0f0 25%, #e4e8e5 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s infinite;
    display: flex;
    flex-direction: column;
    padding: 18px;
    gap: 10px;
    z-index: 2;
    transition: opacity 0.3s ease;
}

.card-skeleton.hidden {
    opacity: 0;
    pointer-events: none;
}

.skeleton-line {
    height: 10px;
    background: rgba(0, 0, 0, 0.06);
    border-radius: 4px;
}
.skeleton-line.short { width: 40%; }
.skeleton-line.medium { width: 70%; }
.skeleton-line.long { width: 90%; }

@keyframes skeleton-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Fallback de ícone caso o PDF demore ou dê erro */
.card-preview-fallback {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    text-align: center;
    padding: 16px;
    color: var(--primary-green);
}

.card-preview-fallback svg {
    width: 48px;
    height: 48px;
    opacity: 0.85;
}

.card-preview-fallback span {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    text-transform: uppercase;
}

/* Badge de tipo de ficheiro (PDF) */
.badge-pdf {
    position: absolute;
    top: 12px;
    right: 12px;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(4px);
    color: var(--primary-green);
    border: 1px solid rgba(41, 82, 53, 0.2);
    font-size: 0.72rem;
    font-weight: 700;
    padding: 4px 9px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    gap: 4px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.06);
    z-index: 5;
}

.badge-pdf svg {
    width: 12px;
    height: 12px;
}

/* Conteúdo / Rodapé do Card */
.card-content {
    padding: 18px 20px 20px;
    display: flex;
    flex-direction: column;
    flex: 1;
    justify-content: space-between;
    gap: 16px;
}

.card-title {
    font-size: 0.98rem;
    font-weight: 600;
    line-height: 1.45;
    color: var(--text-primary);
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    min-height: 2.85em;
    transition: color 0.2s ease;
}

.certification-card:hover .card-title {
    color: var(--primary-green);
}

/* Linha inferior do Card com o botão VER */
.card-footer-action {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 12px;
    border-top: 1px solid rgba(0, 0, 0, 0.06);
}

.card-meta-info {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Pequeno Botão "VER" */
.btn-view-document {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    background-color: var(--primary-green);
    color: #FFFFFF;
    padding: 7px 15px;
    border-radius: 8px;
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    border: none;
    cursor: pointer;
    transition: var(--transition-smooth);
    text-transform: uppercase;
}

.btn-view-document svg {
    width: 14px;
    height: 14px;
    transition: transform 0.2s ease;
}

.certification-card:hover .btn-view-document {
    background-color: #1e3d28;
    box-shadow: 0 4px 10px rgba(41, 82, 53, 0.3);
}

.certification-card:hover .btn-view-document svg {
    transform: translateX(2px);
}

/* Estado de Carregamento Geral / Vazio / Erro */
.loading-indicator,
.empty-state,
.error-state {
    grid-column: 1 / -1;
    background: #FFFFFF;
    border-radius: 16px;
    padding: 50px 24px;
    text-align: center;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
}

.spinner {
    width: 44px;
    height: 44px;
    border: 3px solid rgba(41, 82, 53, 0.15);
    border-top-color: var(--primary-green);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.empty-state-icon,
.error-state-icon {
    width: 56px;
    height: 56px;
    color: var(--primary-green);
    opacity: 0.7;
}

.empty-state h3,
.error-state h3 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
}

.empty-state p,
.error-state p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
    max-width: 440px;
}

/* Botão ativo no footer */
.site-footer .btn-certificacoes.active {
    box-shadow: 0 0 0 2px #FFFFFF, 0 0 0 4px var(--primary-green);
}