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

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

/* ── Variáveis ────────────────────────────────────────── */
:root {
  --text:        #1a1a1a;
  --text-muted:  #666;
  --text-faint:  #999;
  --border:      #e8e8e8;
  --bg:          #fafaf8;
  --bg-block:    #f4f3ef;
  --accent:      #534AB7;
  --accent-bg:   #EEEDFE;
  --font-body:   'DM Sans', sans-serif;
  --font-serif:  'Lora', serif;
  --font-mono:   'JetBrains Mono', monospace;
  --col:         640px;
  --gap:         2rem;
}

/* ── Base ─────────────────────────────────────────────── */
html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

/* ── Layout ───────────────────────────────────────────── */
.container {
  max-width: var(--col);
  margin: 0 auto;
  padding: 3rem 1.25rem 4rem;
}

/* ── Cabeçalho do site ────────────────────────────────── */
.site-header {
  margin-bottom: 3rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.site-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 500;
  letter-spacing: -0.2px;
  color: var(--text);
  display: block;
  margin-bottom: 0.25rem;
}

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

.site-desc {
  font-size: 0.8rem;
  color: var(--text-faint);
  letter-spacing: 0.4px;
}

/* ── Post ─────────────────────────────────────────────── */
.post { }

.post-header {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  margin-bottom: 0.625rem;
}

.tag {
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--accent-bg);
  color: var(--accent);
}

.post-date {
  font-size: 0.75rem;
  color: var(--text-faint);
}

.post-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 500;
  line-height: 1.3;
  margin-bottom: 1.25rem;
  color: var(--text);
}

.post-title a:hover { color: var(--accent); }
.post-title.single { cursor: default; }

/* ── Conteúdo do post ─────────────────────────────────── */
.post-content { font-size: 0.9375rem; }

.post-content p {
  margin-bottom: 1rem;
  color: #333;
}

.post-content h2 {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 500;
  margin: 2rem 0 0.75rem;
  color: var(--text);
}

.post-content h3 {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 500;
  margin: 1.5rem 0 0.5rem;
  color: var(--text);
}

.post-content h4 {
  font-size: 0.875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin: 1.5rem 0 0.5rem;
}

.post-content strong { font-weight: 500; }
.post-content em     { font-style: italic; }

.post-content a {
  color: var(--accent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s;
}
.post-content a:hover { border-color: var(--accent); }

.post-content ul,
.post-content ol {
  margin: 0.75rem 0 1rem 1.5rem;
}

.post-content li { margin-bottom: 0.25rem; }

.post-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

/* ── Código ───────────────────────────────────────────── */
.post-content code {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  background: var(--bg-block);
  padding: 1px 5px;
  border-radius: 3px;
  color: var(--text);
}

.post-content pre {
  background: var(--bg-block);
  border-radius: 6px;
  padding: 1rem 1.25rem;
  margin: 1.25rem 0;
  overflow-x: auto;
}

.post-content pre code {
  background: none;
  padding: 0;
  font-size: 0.8125rem;
  line-height: 1.6;
}

/* ── Blocos de LaTeX (MathJax renderiza dentro de p) ──── */
.post-content .MathJax {
  font-size: 1rem !important;
}

/* Destaque para equações em bloco */
.post-content mjx-container[display="true"] {
  display: block;
  margin: 1.5rem 0;
  padding: 1rem 1.25rem;
  background: var(--bg-block);
  border-left: 2px solid #AFA9EC;
  border-radius: 0 6px 6px 0;
  overflow-x: auto;
}

/* ── Separador entre posts ────────────────────────────── */
.post-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 3rem 0;
}

/* ── Rodapé do post ───────────────────────────────────── */
.post-footer {
  margin-top: 1.5rem;
}

.permalink {
  font-size: 0.8125rem;
  color: var(--text-faint);
  border-bottom: 1px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}
.permalink:hover {
  color: var(--text);
  border-color: var(--border);
}

/* ── Rodapé do site ───────────────────────────────────── */
.site-footer {
  margin-top: 4rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-size: 0.8125rem;
  color: var(--text-faint);
}

/* ── Vazio ────────────────────────────────────────────── */
.empty {
  color: var(--text-muted);
  font-size: 0.9375rem;
}
.empty code {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  background: var(--bg-block);
  padding: 1px 5px;
  border-radius: 3px;
}

/* ── Paginação ────────────────────────────────────────── */
.pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-size: 0.8125rem;
}

.pag-arrow {
  color: var(--text-faint);
  transition: color 0.15s;
}
.pag-arrow:hover { color: var(--accent); }
.pag-disabled { opacity: 0.3; pointer-events: none; }

.pag-pages {
  display: flex;
  gap: 0.25rem;
}

.pag-num {
  width: 1.75rem;
  height: 1.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  color: var(--text-faint);
  transition: color 0.15s, background 0.15s;
}
.pag-num:hover { color: var(--accent); background: var(--accent-bg); }
.pag-current {
  background: var(--accent);
  color: #fff !important;
  font-weight: 500;
}

/* ── Mobile ───────────────────────────────────────────── */
@media (max-width: 680px) {
  .container { padding: 2rem 1rem 3rem; }
  .post-title { font-size: 1.25rem; }
}