/* ==========================================================================
   WSRicardo - Estilo v3 (Minimalista, Moderno, Leitura Confortável)
   Baseado nas especificações de specv3.md
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&family=Lora:ital,wght@0,400;0,600;1,400&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
    /* Paleta Clara & Neutra */
    --bg-main: #ffffff;
    --bg-subtle: #f8f9fa;
    --bg-card: #ffffff;
    --border-color: #e9ecef;
    --border-hover: #ced4da;

    /* Cores de Texto */
    --text-primary: #1f2429;
    --text-secondary: #586069;
    --text-muted: #8c959f;

    /* Acentos & Links */
    --accent: #0969da;
    --accent-hover: #0550ae;

    /* Footer Exclusivo (Preto conforme specv3.md) */
    --footer-bg: #121212;
    --footer-text: #e0e0e0;
    --footer-muted: #888888;
    --footer-link: #ffffff;
    --footer-link-hover: #58a6ff;

    /* Tipografia */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-serif: 'Lora', Georgia, Cambria, "Times New Roman", Times, serif;
    --font-mono: 'JetBrains Mono', SFMono-Regular, Menlo, Monaco, Consolas, monospace;

    /* Dimensões & Espaçamento */
    --max-width-content: 780px;
    --max-width-wide: 1040px;
    --header-height: 64px;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    /* Transição Suave */
    --transition: all 0.2s ease-in-out;
}

/* Reset Básico */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* Imagens e Mídia Responsiva */
img, picture, video, canvas, svg {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Tratamento de Imagens e Figuras no Conteúdo Editorial */
.post-body img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    margin: 1.5rem auto;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
    border: 1px solid var(--border-color);
}

.post-body figure {
    margin: 2rem 0;
    text-align: center;
}

.post-body figcaption {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
    font-style: italic;
}

/* Imagem de Capa do Artigo (Thumbnail) */
.post-cover-image {
    width: 100%;
    max-height: 440px;
    object-fit: cover;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    margin: 1.25rem 0 2rem;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 1.0625rem; /* ~17px para leitura agradável */
    line-height: 1.7;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ==========================================================================
   Tipografia
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    color: var(--text-primary);
    font-weight: 600;
    line-height: 1.35;
    margin-bottom: 0.8rem;
}

h1 { font-size: clamp(1.8rem, 4vw, 2.4rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.4rem, 3vw, 1.8rem); margin-top: 1.8rem; }
h3 { font-size: 1.25rem; margin-top: 1.4rem; }

p {
    margin-bottom: 1.3rem;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

code, pre {
    font-family: var(--font-mono);
    font-size: 0.9em;
}

code {
    background-color: var(--bg-subtle);
    padding: 0.2em 0.4em;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

pre {
    background-color: var(--bg-subtle);
    padding: 1rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    overflow-x: auto;
    margin-bottom: 1.5rem;
}

pre code {
    background: none;
    padding: 0;
    border: none;
}

/* ==========================================================================
   Header & Navegação (Título 18px conforme specv3.md)
   ========================================================================== */

.site-header {
    background-color: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-height);
    display: flex;
    align-items: center;
}

.header-container {
    width: 100%;
    max-width: var(--max-width-wide);
    margin: 0 auto;
    padding: 0 1.25rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Título estritamente 18px conforme especificado */
.site-title {
    font-family: var(--font-sans);
    font-size: 18px !important;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none !important;
    letter-spacing: -0.01em;
}

.site-title:hover {
    color: var(--accent);
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    padding: 0.25rem 0;
    position: relative;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
    text-decoration: none;
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--text-primary);
}

/* Botão Hamburger Mobile */
.mobile-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    color: var(--text-primary);
    font-size: 1.25rem;
}

/* ==========================================================================
   Body Content (Centro Vertical do Layout)
   ========================================================================== */

.body-content {
    flex: 1;
    width: 100%;
    max-width: var(--max-width-content);
    margin: 0 auto;
    padding: 2.5rem 1.25rem 4rem;
}

.body-content-wide {
    max-width: var(--max-width-wide);
}

/* Hero Minimalista */
.hero-intro {
    padding: 2rem 0 3rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 2.5rem;
}

.hero-intro .tagline {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 620px;
    margin-top: 0.5rem;
    margin-bottom: 0;
}

/* Lista / Feed de Publicações */
.posts-feed {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.post-card {
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.post-card:last-child {
    border-bottom: none;
}

.post-card .post-meta {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.35rem;
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.post-card .post-category {
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.05em;
    font-size: 0.75rem;
    color: var(--accent);
}

.post-card .post-title {
    font-size: 1.35rem;
    margin-bottom: 0.5rem;
}

.post-card .post-title a {
    color: var(--text-primary);
    text-decoration: none;
}

.post-card .post-title a:hover {
    color: var(--accent);
}

.post-card .post-summary {
    color: var(--text-secondary);
    font-size: 0.98rem;
    line-height: 1.6;
    margin-bottom: 0.5rem;
}

/* Grid de Seções / Categorias */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1.25rem;
    margin: 2rem 0;
}

.category-card {
    background-color: var(--bg-subtle);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.category-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
}

.category-card h3 {
    margin-top: 0;
    margin-bottom: 0.5rem;
    font-size: 1.15rem;
}

.category-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0;
}

/* Contêiner de Vídeo Responsivo (YouTube ou Vídeo Anexado) */
.video-container {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 */
    height: 0;
    overflow: hidden;
    max-width: 100%;
    background: #000;
    border-radius: var(--radius-md);
    margin: 1.5rem 0;
}

.video-container iframe,
.video-container video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

/* ==========================================================================
   Footer (Preto conforme specv3.md)
   ========================================================================== */

.site-footer {
    background-color: var(--footer-bg);
    color: var(--footer-text);
    padding: 3rem 1.25rem 2.5rem;
    margin-top: auto;
    border-top: 1px solid #222;
}

.footer-container {
    max-width: var(--max-width-wide);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
}

.footer-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-brand h4 {
    color: #ffffff;
    font-size: 1.1rem;
    font-family: var(--font-sans);
    margin-bottom: 0.35rem;
}

.footer-brand p {
    color: var(--footer-muted);
    font-size: 0.875rem;
    margin-bottom: 0;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    list-style: none;
}

.footer-links a {
    color: var(--footer-link);
    font-size: 0.9rem;
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--footer-link-hover);
    text-decoration: underline;
}

.footer-bottom {
    border-top: 1px solid #262626;
    padding-top: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    font-size: 0.8rem;
    color: var(--footer-muted);
}

/* ==========================================================================
   Responsividade Multinível (specv3.md: Smart TV, Tablets, Mobile, Smartwatches)
   ========================================================================== */

/* Telas Grandes & Smart TVs (> 1440px) */
@media (min-width: 1441px) {
    html {
        font-size: 18px; /* Escala tipográfica confortável para telas grandes e Smart TV */
    }
}

/* Tablets e Mobile (< 768px) */
@media (max-width: 768px) {
    :root {
        --header-height: 58px;
    }

    .mobile-toggle {
        display: block;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        background-color: var(--bg-main);
        flex-direction: column;
        padding: 1.25rem;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
        gap: 1rem;
    }

    .nav-links.active {
        display: flex;
    }

    .body-content {
        padding: 1.75rem 1rem 3rem;
    }

    .footer-top {
        flex-direction: column;
        gap: 1.25rem;
    }
}

/* Smartwatches e Telas Extremamente Pequenas (< 300px) */
@media (max-width: 300px) {
    html {
        font-size: 14px;
    }

    .header-container {
        padding: 0 0.5rem;
    }

    .site-title {
        font-size: 16px !important; /* Ajuste suave para smartwatch */
    }

    .body-content {
        padding: 1rem 0.5rem;
    }

    .post-card .post-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.2rem;
    }

    .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
    }
}