/**
 * blog.css — Portal de Artigos
 * marcosdesenvolvedor.com.br
 * Design ultra moderno: tipografia editorial, hero dark, gold accents
 */

/* ============================================================
   VARIÁVEIS (herda :root do custom.css)
   ============================================================ */
:root {
    --blog-dark:      #0D0D0D;
    --blog-dark-2:    #1A1A1A;
    --blog-dark-3:    #2A2A2A;
    --blog-card-bg:   #F7F6F1;
    --blog-border:    #E2DDD3;
    --blog-radius:    12px;
    --blog-gold:      #FFD60A;
    --blog-gold-2:    #C9A84C;
    --blog-font-body: clamp(1.05rem, 1.3vw, 1.15rem);
    --blog-max-prose: 700px;
    --transition:     0.25s ease;
}

/* ============================================================
   BARRA DE PROGRESSO DE LEITURA (fixed, topo)
   ============================================================ */
#leitura-progresso {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    width: 0%;
    background: var(--blog-gold);
    z-index: 9999;
    transition: width 0.1s linear;
    pointer-events: none;
}

/* ============================================================
   HERO DA LISTAGEM
   ============================================================ */
.artigos-hero {
    background: var(--blog-dark);
    color: #fff;
    padding: 100px 24px 80px;
    position: relative;
    overflow: hidden;
}

/* Grain texture via pseudo-element */
.artigos-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
    background-size: 180px;
    opacity: 0.35;
    pointer-events: none;
}

.artigos-hero-inner {
    max-width: 1160px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.artigos-hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--blog-gold);
    margin-bottom: 24px;
}

.artigos-hero-eyebrow::before {
    content: '';
    display: block;
    width: 32px;
    height: 2px;
    background: var(--blog-gold);
    border-radius: 2px;
}

.artigos-hero-heading {
    font-size: clamp(2.8rem, 6vw, 5.5rem);
    font-weight: 900;
    line-height: 1.0;
    letter-spacing: -0.03em;
    color: #fff;
    margin: 0 0 24px;
}

.artigos-hero-heading em {
    font-style: normal;
    color: var(--blog-gold);
}

.artigos-hero-sub {
    font-size: clamp(1rem, 1.4vw, 1.15rem);
    color: rgba(255, 255, 255, 0.6);
    max-width: 540px;
    line-height: 1.6;
    margin: 0;
}

/* ============================================================
   BARRA DE FILTRO POR CATEGORIA
   ============================================================ */
.artigos-filtro-bar {
    background: #fff;
    border-bottom: 1px solid var(--blog-border);
    padding: 0 24px;
    position: sticky;
    top: 82px;   /* abaixo do navbar */
    z-index: 100;
}

.artigos-filtro-inner {
    max-width: 1160px;
    margin: 0 auto;
    display: flex;
    gap: 4px;
    overflow-x: auto;
    scrollbar-width: none;
    padding: 12px 0;
}

.artigos-filtro-inner::-webkit-scrollbar { display: none; }

.filtro-btn {
    flex-shrink: 0;
    padding: 7px 18px;
    border-radius: 999px;
    border: 1.5px solid var(--blog-border);
    background: transparent;
    font-size: 13px;
    font-weight: 600;
    color: #555;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
    outline: none;
}

.filtro-btn:hover,
.filtro-btn.ativo {
    background: var(--blog-dark);
    border-color: var(--blog-dark);
    color: #fff;
}

.filtro-btn[data-cat="estrategia"].ativo  { background: #1A1A2E; border-color: #1A1A2E; }
.filtro-btn[data-cat="consultoria"].ativo { background: #0A2342; border-color: #0A2342; }
.filtro-btn[data-cat="inovacao"].ativo    { background: #1A3A1A; border-color: #1A3A1A; }
.filtro-btn[data-cat="seo-geo"].ativo     { background: #2E1A3A; border-color: #2E1A3A; }

/* ============================================================
   GRID DE ARTIGOS
   ============================================================ */
.artigos-section {
    padding: 60px 24px 80px;
    background: var(--blog-card-bg);
}

.artigos-section-inner {
    max-width: 1160px;
    margin: 0 auto;
}

/* Layout: featured (destaque=1) em cima, grid embaixo */
.artigo-featured-wrap {
    margin-bottom: 48px;
}

.artigos-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

@media (max-width: 1024px) {
    .artigos-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
    .artigos-grid { grid-template-columns: 1fr; }
}

/* Card base */
.artigo-card {
    background: #fff;
    border-radius: var(--blog-radius);
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    transition: transform var(--transition), box-shadow var(--transition);
    border: 1px solid var(--blog-border);
}

.artigo-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 40px rgba(0,0,0,0.10);
    text-decoration: none;
    color: inherit;
}

.artigo-card-img {
    width: 100%;
    aspect-ratio: 16/9;
    object-fit: cover;
    display: block;
    background: var(--blog-dark-3);
}

/* placeholder quando não há imagem */
.artigo-card-img-placeholder {
    width: 100%;
    aspect-ratio: 16/9;
    background: linear-gradient(135deg, var(--blog-dark) 0%, var(--blog-dark-3) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    color: var(--blog-gold);
    opacity: 0.6;
}

.artigo-card-body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.artigo-card-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
}

.artigo-categoria-badge {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 4px 10px;
    border-radius: 999px;
    color: #fff;
}

.badge-estrategia  { background: #1A1A2E; }
.badge-consultoria { background: #0A2342; }
.badge-inovacao    { background: #1A3A1A; }
.badge-seo-geo     { background: #2E1A3A; }

.artigo-tempo-leitura {
    font-size: 12px;
    color: #888;
    display: flex;
    align-items: center;
    gap: 5px;
}

.artigo-tempo-leitura svg {
    width: 13px;
    height: 13px;
    opacity: 0.6;
}

.artigo-card-titulo {
    font-size: 1.1rem;
    font-weight: 700;
    line-height: 1.35;
    color: var(--blog-dark);
    margin: 0 0 10px;
    letter-spacing: -0.01em;
}

.artigo-card-resumo {
    font-size: 0.88rem;
    color: #666;
    line-height: 1.55;
    flex: 1;
    margin: 0 0 20px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.artigo-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 16px;
    border-top: 1px solid var(--blog-border);
    font-size: 12px;
    color: #999;
}

.artigo-card-autor {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: #555;
}

.artigo-card-autor img {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    object-fit: cover;
}

/* Card em destaque (featured) */
.artigo-card.artigo-card-featured {
    flex-direction: row;
    background: var(--blog-dark);
    color: #fff;
    border-color: transparent;
    min-height: 320px;
}

.artigo-card.artigo-card-featured:hover {
    box-shadow: 0 20px 60px rgba(0,0,0,0.25);
}

.artigo-card.artigo-card-featured .artigo-card-img,
.artigo-card.artigo-card-featured .artigo-card-img-placeholder {
    width: 45%;
    aspect-ratio: unset;
    min-height: 100%;
    flex-shrink: 0;
}

.artigo-card.artigo-card-featured .artigo-card-body {
    padding: 36px 36px 36px 40px;
    justify-content: center;
}

.artigo-card.artigo-card-featured .artigo-card-titulo {
    font-size: 1.5rem;
    color: #fff;
    margin-bottom: 14px;
}

.artigo-card.artigo-card-featured .artigo-card-resumo {
    color: rgba(255,255,255,0.65);
    -webkit-line-clamp: 4;
}

.artigo-card.artigo-card-featured .artigo-card-footer {
    border-top-color: rgba(255,255,255,0.1);
    color: rgba(255,255,255,0.5);
}

.artigo-card.artigo-card-featured .artigo-card-autor {
    color: rgba(255,255,255,0.7);
}

.artigo-ler-btn {
    font-size: 12px;
    font-weight: 700;
    color: var(--blog-gold);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 5px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    transition: gap var(--transition);
}

.artigo-ler-btn:hover { gap: 9px; color: var(--blog-gold); }

@media (max-width: 768px) {
    .artigo-card.artigo-card-featured {
        flex-direction: column;
    }
    .artigo-card.artigo-card-featured .artigo-card-img,
    .artigo-card.artigo-card-featured .artigo-card-img-placeholder {
        width: 100%;
        aspect-ratio: 16/9;
        min-height: unset;
    }
    .artigo-card.artigo-card-featured .artigo-card-body {
        padding: 24px;
    }
}

/* ============================================================
   ESTADO VAZIO
   ============================================================ */
.artigos-vazio {
    text-align: center;
    padding: 60px 20px;
    color: #999;
    grid-column: 1 / -1;
}

/* ============================================================
   DETALHE DO ARTIGO — HERO
   ============================================================ */
.artigo-detalhe-hero {
    background: var(--blog-dark);
    color: #fff;
    padding: 80px 24px 60px;
    position: relative;
    overflow: hidden;
}

.artigo-detalhe-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(0,0,0,0) 60%, rgba(0,0,0,0.6) 100%);
}

.artigo-detalhe-hero-inner {
    max-width: 860px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.artigo-breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: rgba(255,255,255,0.5);
    margin-bottom: 28px;
    flex-wrap: wrap;
}

.artigo-breadcrumb a {
    color: rgba(255,255,255,0.5);
    text-decoration: none;
    transition: color var(--transition);
}

.artigo-breadcrumb a:hover { color: var(--blog-gold); }
.artigo-breadcrumb span   { color: rgba(255,255,255,0.3); }

.artigo-detalhe-titulo {
    font-size: clamp(2rem, 4.5vw, 3.2rem);
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin: 0 0 20px;
    color: #fff;
}

.artigo-detalhe-subtitulo {
    font-size: clamp(1rem, 1.5vw, 1.15rem);
    color: rgba(255,255,255,0.65);
    line-height: 1.55;
    margin: 0 0 36px;
    max-width: 640px;
}

.artigo-detalhe-metabar {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    font-size: 13px;
    color: rgba(255,255,255,0.5);
    padding-top: 24px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.artigo-detalhe-metabar .artigo-categoria-badge {
    opacity: 0.9;
}

.artigo-detalhe-metabar .sep {
    width: 4px;
    height: 4px;
    background: rgba(255,255,255,0.3);
    border-radius: 50%;
}

/* ============================================================
   LAYOUT ARTIGO: PROSE + SIDEBAR
   ============================================================ */
.artigo-layout {
    max-width: 1160px;
    margin: 0 auto;
    padding: 64px 24px 80px;
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 80px;
    align-items: start;
}

@media (max-width: 1024px) {
    .artigo-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

/* ============================================================
   PROSE — CORPO DO ARTIGO
   ============================================================ */
.artigo-prose {
    min-width: 0;
}

.artigo-prose p {
    font-size: var(--blog-font-body);
    line-height: 1.8;
    color: #2D2D2D;
    margin: 0 0 1.5em;
}

.artigo-prose h2 {
    font-size: clamp(1.35rem, 2.2vw, 1.65rem);
    font-weight: 800;
    color: var(--blog-dark);
    margin: 2.5em 0 0.7em;
    padding-left: 18px;
    border-left: 4px solid var(--blog-gold);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.artigo-prose h3 {
    font-size: clamp(1.1rem, 1.6vw, 1.25rem);
    font-weight: 700;
    color: var(--blog-dark);
    margin: 2em 0 0.6em;
    letter-spacing: -0.01em;
}

.artigo-prose ul,
.artigo-prose ol {
    margin: 0 0 1.5em 0;
    padding-left: 1.5em;
}

.artigo-prose li {
    font-size: var(--blog-font-body);
    line-height: 1.7;
    color: #2D2D2D;
    margin-bottom: 0.4em;
}

.artigo-prose strong { color: var(--blog-dark); }

.artigo-prose em { font-style: italic; }

.artigo-prose code {
    background: #F0EDE6;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.88em;
    color: #C92A2A;
    font-family: 'Fira Code', 'Courier New', monospace;
}

.artigo-prose blockquote {
    border-left: 4px solid var(--blog-gold);
    margin: 2em 0;
    padding: 1em 1.5em;
    background: #FFF9E0;
    border-radius: 0 8px 8px 0;
}

.artigo-prose blockquote p {
    margin: 0;
    font-style: italic;
    color: #555;
}

.artigo-prose a {
    color: var(--blog-gold-2);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.artigo-prose a:hover { color: var(--blog-dark); }

/* ============================================================
   SHARE BAR
   ============================================================ */
.artigo-share {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 24px 0;
    border-top: 1px solid var(--blog-border);
    border-bottom: 1px solid var(--blog-border);
    margin: 40px 0;
    flex-wrap: wrap;
}

.artigo-share-label {
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: #888;
    margin-right: 4px;
}

.share-btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 8px 16px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition);
    border: 1.5px solid var(--blog-border);
    color: #444;
    background: #fff;
    cursor: pointer;
    outline: none;
}

.share-btn:hover { border-color: var(--blog-dark); background: var(--blog-dark); color: #fff; }

.share-btn svg { width: 15px; height: 15px; flex-shrink: 0; }

.share-btn.copied { border-color: #4CAF50; background: #4CAF50; color: #fff; }

/* ============================================================
   BLOCO DO AUTOR
   ============================================================ */
.artigo-autor-bloco {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 28px;
    background: #F7F6F1;
    border-radius: var(--blog-radius);
    border: 1px solid var(--blog-border);
    margin: 40px 0;
}

.artigo-autor-foto {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
    border: 3px solid #fff;
    box-shadow: 0 0 0 2px var(--blog-gold);
}

.artigo-autor-info h4 {
    font-size: 1rem;
    font-weight: 700;
    margin: 0 0 4px;
    color: var(--blog-dark);
}

.artigo-autor-info p {
    font-size: 0.88rem;
    color: #666;
    line-height: 1.55;
    margin: 0;
}

/* ============================================================
   CTA — SEM COMENTÁRIOS, MAS COM CONVITE
   ============================================================ */
.artigo-cta-bloco {
    background: var(--blog-dark);
    color: #fff;
    border-radius: var(--blog-radius);
    padding: 40px 36px;
    margin: 40px 0;
    text-align: center;
}

.artigo-cta-bloco h3 {
    font-size: 1.4rem;
    font-weight: 800;
    margin: 0 0 12px;
    letter-spacing: -0.02em;
}

.artigo-cta-bloco h3 span { color: var(--blog-gold); }

.artigo-cta-bloco p {
    font-size: 0.95rem;
    color: rgba(255,255,255,0.65);
    margin: 0 0 24px;
    line-height: 1.6;
}

.artigo-cta-bloco .btn-cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--blog-gold);
    color: var(--blog-dark);
    font-weight: 700;
    padding: 14px 28px;
    border-radius: 999px;
    text-decoration: none;
    font-size: 0.95rem;
    transition: all var(--transition);
}

.artigo-cta-bloco .btn-cta:hover {
    background: #fff;
    color: var(--blog-dark);
    text-decoration: none;
}

/* ============================================================
   ARTIGOS RELACIONADOS
   ============================================================ */
.artigo-relacionados {
    margin-top: 60px;
    padding-top: 40px;
    border-top: 1px solid var(--blog-border);
}

.artigo-relacionados h2 {
    font-size: 1.3rem;
    font-weight: 800;
    margin: 0 0 28px;
    letter-spacing: -0.02em;
    color: var(--blog-dark);
    /* sobrescreve o estilo do .artigo-prose para h2 fora do prose */
    padding-left: 0;
    border-left: none;
}

.relacionados-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

@media (max-width: 768px) {
    .relacionados-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   SIDEBAR — TABLE OF CONTENTS
   ============================================================ */
.artigo-sidebar {
    position: sticky;
    top: 100px;
}

@media (max-width: 1024px) {
    .artigo-sidebar { display: none; }
}

.artigo-toc {
    background: #F7F6F1;
    border-radius: var(--blog-radius);
    border: 1px solid var(--blog-border);
    padding: 24px;
}

.artigo-toc-titulo {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: #888;
    margin: 0 0 16px;
}

.toc-lista {
    list-style: none;
    padding: 0;
    margin: 0;
}

.toc-lista li { margin-bottom: 4px; }

.toc-link {
    display: block;
    font-size: 13px;
    line-height: 1.4;
    color: #666;
    text-decoration: none;
    padding: 5px 8px;
    border-radius: 6px;
    border-left: 2px solid transparent;
    transition: all var(--transition);
}

.toc-link:hover,
.toc-link.ativo {
    color: var(--blog-dark);
    background: rgba(255, 214, 10, 0.12);
    border-left-color: var(--blog-gold);
}

.toc-link.toc-h3 {
    padding-left: 18px;
    font-size: 12px;
}