html {
  box-sizing: border-box;
}

*, *::before, *::after {
  box-sizing: inherit;
}

:root {
  --color-bg: #FFFCF0;
  --color-bg2: #F2F0E5;
  --color-text: #100F0F;
  --color-text-muted: #6F6E69;
  --link-color: #24837B;
  --active-link-color: #66800B;
  --color-red: #AF3029;
  --color-rss: #FF6600;
  --font-heading: 'Lora', Georgia, serif;
  --font-body: 'Inter', -apple-system, 'Segoe UI', 'Helvetica Neue', sans-serif;
  --font-footer: 'Merriweather', Georgia, serif;
  --font-mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;
  --nav-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  --card-shadow: 0 6px 16px rgba(0, 0, 0, 0.12);
}

:root[data-theme="dark"] {
  --color-bg: #100F0F;
  --color-bg2: #1C1B1A;
  --color-text: #CECDC3;
  --color-text-muted: #878580;
  --link-color: #3AA99F;
  --active-link-color: #879A39;
  --color-red: #D14D41;
  --color-rss: #FF6600;
  --nav-shadow: 0 6px 16px rgba(0, 0, 0, 0.8);
  --card-shadow: 0 6px 18px rgba(0, 0, 0, 0.55);
}

/* Só existe na home (ver header.html), então acompanha a largura de
   .main--home para o nome do site alinhar com a coluna da esquerda. */
header {
  width: 100%;
  max-width: calc(860px + 3rem);
  margin: 0 auto;
  padding: 0 1.5rem;
}

header h1 {
  font-family: var(--font-heading);
  font-size: 3.5rem;
  margin-bottom: 0;
}

#theme-toggle {
  background: none;
  border: none;
  padding: 0;
  color: var(--color-text);
  font-size: 1.1rem;
  line-height: 1;
  cursor: pointer;
}

#theme-toggle:hover {
  color: var(--link-color);
}

.theme-icon {
  display: none;
}

:root[data-theme-mode="light"] .theme-icon--light,
:root[data-theme-mode="dark"] .theme-icon--dark,
:root[data-theme-mode="auto"] .theme-icon--auto,
:root:not([data-theme-mode]) .theme-icon--auto {
  display: inline-block;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  padding: 0;
  color: var(--color-text);
  font-size: 1.3rem;
  line-height: 1;
  cursor: pointer;
}

.nav-toggle:hover {
  color: var(--link-color);
}

html, body {
  height: 100%;
  margin: 0;
}

::selection {
  background-color: rgb(58, 169, 159, 0.2);
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

main {
  flex: 1;
  width: 100%;
  padding: 0 6rem;
  max-width: calc(700px + 12rem);
  margin: 0 auto 5rem;
  line-height: 1.7;
}

/* A home é a única página em grade; 860px dão ~410px por coluna, contra os
   330px de antes. As demais páginas continuam em 700px, que é a medida de
   leitura confortável para texto corrido. */
.main--home {
  max-width: calc(860px + 12rem);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: 3.5rem;
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  text-decoration: none;
}

.back-link:hover {
  color: var(--link-color);
  font-weight: 700;
}

.back-link i {
  font-size: 1.1em;
}

.back-link + .page-title,
.back-link + .title-center {
  margin-top: 1rem;
}

.back-link + h1 {
  margin-top: 0.75rem;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  line-height: 1.25;
}

:where(h1, h2, h3, h4, h5, h6)[id] {
  scroll-margin-top: 5rem;
}

p {
  font-size: 1.05rem;
  line-height: 1.7;
}

main p {
  max-width: 70ch;
}

p:not(.home-actions):not(.pub-card-links):not(.footer-text) a:not(.btn),
blockquote a,
.post-content li a {
  color: var(--link-color);
  text-decoration: underline;
  text-decoration-color: transparent;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  border-radius: 2px;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
  transition: color 0.3s ease, text-decoration-color 0.3s ease;
}

p:not(.home-actions):not(.pub-card-links):not(.footer-text) a:not(.btn):hover,
blockquote a:hover,
.post-content li a:hover {
  color: var(--color-text);
  text-decoration-color: var(--link-color);
}

.now-content :where(h1, h2, h3, h4, h5, h6) a {
  color: var(--link-color);
  text-decoration: underline;
  text-decoration-color: transparent;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  border-radius: 2px;
  transition: color 0.3s ease, text-decoration-color 0.3s ease;
}

.now-content :where(h1, h2, h3, h4, h5, h6) a:hover {
  color: var(--color-text);
  text-decoration-color: var(--link-color);
}

.license-note {
  font-size: 0.875rem;
  opacity: 0.8;
  border-top: 1px solid currentColor;
  color: var(--color-text-muted);
  padding-top: 1.5rem;
  margin-top: 2rem;
}

.license-note a {
  color: var(--color-text-muted);
  text-decoration: underline;
}

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

.home-intro {
  color: var(--color-text-muted);
  font-family: var(--font-footer);
  line-height: 1.8;
  display: block;
  max-width: 40rem;
  margin:0;
}

hr {
  border: 0;
  border-top: 1px solid currentColor;
  margin: 2rem 0;
}

/* Citação em bloco (`>` no markdown). A barra à esquerda é a marca do
   formato; o tom secundário afasta a citação do corpo do texto sem criar
   mais um nível de hierarquia. Não força itálico: quem escreve decide, e
   as citações do site já vêm em *...* no próprio markdown. */
blockquote {
  margin: 2rem 0 2rem 1.5rem;
  padding: 0.4rem 0 0.4rem 1.6rem;
  border-left: 3px solid color-mix(in srgb, var(--link-color) 40%, transparent);
  color: var(--color-text-muted);
  font-family: var(--font-footer);
}

blockquote p {
  font-size: 0.98rem;
  line-height: 1.75;
}

/* A margem do <p> interno somaria à do blockquote e descolaria o texto do
   topo da barra. */
blockquote > :first-child {
  margin-top: 0;
}

blockquote > :last-child {
  margin-bottom: 0;
}

.home-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1.15rem;
  margin: 1.5rem 0 0;
}

/* Variante centralizada da fileira de pílulas. Em flex container,
   text-align não move os itens — só o texto dentro de cada um. */
.home-actions--center {
  justify-content: center;
}

.home-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  margin-top: 4.5rem;
}

.home-columns > .home-section {
  margin-top: 0;
  min-width: 0;
}

.home-section-title + .home-columns {
  margin-top: 0;
}

.home-columns > .home-section > :first-child {
  margin-top: 0;
}

.home-section {
  margin-top: 4.5rem;
}

.home-section-title {
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin: 0 0 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid color-mix(in srgb, var(--color-text-muted) 30%, transparent);
}

/* Título que cobre as duas colunas. O corpo maior o separa dos títulos de
   cada coluna, que compartilham o mesmo tratamento. O margin-top substitui
   os <br> que abriam esse respiro — 5rem reproduz os 82px que eles davam,
   e agora o valor acompanha o breakpoint. */
.home-section-title--main {
  font-size: 1rem;
  margin-top: 5rem;
}

/* Os títulos das colunas dispensam o filete: o de "Posts mais recentes",
   logo acima, já delimita o bloco inteiro. Sem a borda o padding perde a
   função, então ele sai junto e o respiro fica só com o margin-bottom. */
.home-columns .home-section-title {
  padding-bottom: 0;
  border-bottom: none;
}

.home-post-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.home-post-card {
  position: relative;
  padding: 1.15rem 1.4rem;
  border-radius: 10px;
  background-color: var(--color-bg2);
  border: 1px solid transparent;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.home-post-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--card-shadow);
  border-color: color-mix(in srgb, var(--color-text-muted) 28%, transparent);
}

/* O foco de teclado cai no título, mas o contorno pertence ao cartão. */
.home-post-card:has(.home-post-title:focus-visible) {
  outline: 2px solid var(--link-color);
  outline-offset: 3px;
}

.home-post-title:focus-visible {
  outline: none;
}

.home-post-date {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
}

.home-post-title {
  display: block;
  margin-top: 0.55rem;
  font-family: var(--font-heading);
  font-size: 1.3rem;
  line-height: 1.3;
  color: var(--color-text);
}

/* Estende a área de clique do título por todo o cartão. As pílulas sobem
   acima dessa camada para continuarem clicáveis por conta própria. */
.home-post-title::after {
  content: "";
  position: absolute;
  inset: 0;
}

.home-post-card:hover .home-post-title {
  color: var(--link-color);
}

.home-post-summary {
  margin: 0.5rem 0 0;
  font-family: var(--font-footer);
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--color-text-muted);
  /* Corta visualmente em 2 linhas em vez de truncar a string: um `truncate`
     poderia cair no meio de um `$...$` e quebrar o KaTeX da página. */
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  overflow: hidden;
}

.home-post-tags {
  position: relative;
  z-index: 1;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem 0.75rem;
  padding: 0;
  margin: 0.7rem 0 0;
  /* Só as tags capturam o clique; os vãos entre elas caem no link do cartão. */
  pointer-events: none;
}

.home-post-tags a {
  pointer-events: auto;
  display: inline-block;
  padding: 0.15rem 0;
  font-family: var(--font-body);
  font-size: 0.76rem;
  letter-spacing: 0.02em;
  color: var(--color-text-muted);
}

.home-post-tags a:hover {
  color: var(--link-color);
}

.home-post-empty {
  color: var(--color-text-muted);
  font-style: italic;
}

.home-post-more {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin-top: 1.75rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 700;
}

.home-post-more:hover {
  color: var(--link-color);
}

/* Índice dos tópicos da /now/ na home. */
.now-topics {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.now-topics li {
  position: relative;
  padding-left: 1.1rem;
}

.now-topics li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: color-mix(in srgb, var(--link-color) 55%, transparent);
}

.now-topics a {
  font-family: var(--font-footer);
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--color-text-muted);
}

.now-topics a:hover {
  color: var(--link-color);
}

.home-post-more-arrow {
  transition: transform 0.18s ease;
}

.home-post-more:hover .home-post-more-arrow {
  transform: translateX(4px);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.2rem 1rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 400;
  line-height: 1.4;
  color: var(--color-text);
  text-decoration: none;
  background-color: transparent;
  border: 0.5px solid var(--color-text-muted);
  border-radius: 999px;
  cursor: pointer;
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.btn:hover {
  color: var(--color-text);
  text-decoration: none;
  border-color: var(--color-text-muted);
  background-color: color-mix(in srgb, var(--color-text-muted) 12%, transparent);
}

.btn:focus-visible {
  outline: 2px solid var(--link-color);
  outline-offset: 2px;
}

.btn-primary {
  color: var(--link-color);
  border-color: var(--color-text-muted);
}

.btn-primary:hover {
  color: var(--color-bg);
  background-color: var(--link-color);
  border-color: var(--link-color);
}

.tag-pills {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  padding: 0;
  margin: 1.25rem 0 0;
}

.tag-pill {
  padding: 0.25rem 0.85rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

.tag-pill:hover {
  color: var(--link-color);
  border-color: var(--link-color);
  background-color: color-mix(in srgb, var(--link-color) 12%, transparent);
}

a {
  color: var(--color-text);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--link-color);
  text-decoration: none;
}

footer {
  background-color: var(--color-bg2);
  color: var(--color-text-muted);
  text-align: center;
  padding: 1rem 0;
  font-size: 0.9rem;
  padding: 1.75rem 1rem;
}

.post-meta {
  font-family: var(--font-footer);
  font-size: 0.8rem;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.post-content {
  margin-top: 3rem;
  max-width: 70ch;
  margin-bottom: 3rem;
}

/* Sem isto uma foto de 3000px estoura a coluna do texto. */
img {
  max-width: 100%;
  height: auto;
}

.post-figure {
  margin: 2.5rem 0;
}

.post-figure img {
  display: block;
  width: 100%;
  border-radius: 8px;
}

.post-figure--sized {
  margin-inline: auto;
}

.post-figure figcaption {
  margin-top: 0.6rem;
  font-family: var(--font-footer);
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--color-text-muted);
  text-align: center;
}

.post-tags {
  margin-top: 0.6rem;
  margin-bottom: 1.6rem;
  color: var(--active-link-color);
  font-family: var(--font-footer);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
}

.post-tags a {
  color: var(--active-link-color);
  text-decoration: none;
  margin-right: 0.8rem;
}

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

.dot {
  color: var(--link-color)
}

.archive-list ul {
  list-style: none;
  padding-left: 40px;
  margin: 0 0 2rem;
}

.archive-list li {
  margin-bottom: 1.05rem;
}

.archive-list a {
  color: var(--link-color);
}

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

.title-icon {
  margin-left: 0.55rem;
  font-size: 0.65em;
  color: var(--color-text-muted);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.search-form {
  margin: 2rem 0 2rem;
}

#search-input {
  width: 100%;
  padding: 0.55rem 1.15rem;
  font-family: var(--font-body);
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-text);
  background-color: transparent;
  border: 2px solid color-mix(in srgb, var(--color-text-muted) 35%, transparent);
  border-radius: 10px;
  outline: none;
  -webkit-appearance: none;
  appearance: none;
  transition: border-color 0.2s ease;
}

#search-input::placeholder {
  color: var(--color-text-muted);
  font-weight: 700;
  opacity: 0.7;
}

#search-input:focus {
  border-color: var(--link-color);
}

#search-input::-webkit-search-cancel-button {
  -webkit-appearance: none;
  appearance: none;
  width: 1em;
  height: 1em;
  margin-left: 0.5rem;
  cursor: pointer;
  background-color: var(--color-red);
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M6 6l12 12M18 6L6 18' fill='none' stroke='%23000' stroke-width='3' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat center / contain;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M6 6l12 12M18 6L6 18' fill='none' stroke='%23000' stroke-width='3' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat center / contain;
}

#search-status {
  font-family: var(--font-footer);
  font-size: 0.85rem;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
  margin: 0 0 0.75rem;
}

#search-status:empty {
  margin: 0;
}

.search-results {
  list-style: none;
  padding: 0;
  margin: 0 0 3rem;
}

.search-results li + li {
  margin-top: 0.35rem;
}

.search-result-link {
  display: block;
  padding: 0.7rem 1rem;
  border-radius: 8px;
  color: var(--color-text);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.search-result-link:hover {
  background-color: color-mix(in srgb, var(--color-text-muted) 15%, transparent);
  color: var(--link-color);
}

.search-result-title {
  display: block;
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.4;
}

.search-meta {
  display: block;
  margin-top: 0.1rem;
  font-family: var(--font-footer);
  font-size: 0.78rem;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
}

.search-snippet {
  display: block;
  margin-top: 0.35rem;
  font-family: var(--font-footer);
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--color-text-muted);
}

.search-snippet mark {
  padding: 0 0.15em;
  border-radius: 3px;
  background-color: color-mix(in srgb, var(--active-link-color) 30%, transparent);
  color: var(--color-text);
}

.list-intro,
.taxonomy-intro {
  font-family: var(--font-footer);
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin-top: 0.75rem;
}

.list-intro p,
.taxonomy-intro p {
  font-size: inherit;
  margin: 0;
}

.rss-subscribe,
.list-intro .rss-subscribe {
  font-family: var(--font-body);
  font-size: 0.85rem;
}

.rss-subscribe a {
  color: var(--color-text-muted);
}

.rss-subscribe a:hover {
  color: var(--link-color);
}

.post-list {
  list-style: none;
  padding: 0;
  margin: 4.5rem 0 2.5rem;
}

.post-list-item {
  display: flex;
  align-items: flex-start;
  gap: 2.5rem;
  margin-bottom: 2.75rem;
}

/* Sem miniatura o <a> não é renderizado, então o texto ocupa a linha toda
   e o `gap` não deixa sobra — flex só espaça itens que existem. */
.post-list-body {
  flex: 1;
  min-width: 0;
}

.post-list-thumb {
  flex: 0 0 200px;
  display: block;
  border-radius: 8px;
  overflow: hidden;
  background-color: var(--color-bg2);
}

.post-list-thumb img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.post-list-item + .post-list-item {
  border-top: 1px solid color-mix(in srgb, var(--color-text-muted) 22%, transparent);
  padding-top: 2.75rem;
}

.post-list-item:last-child {
  margin-bottom: 0;
}

.post-list-item .post-meta {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  margin-bottom: 0.55rem;
}

.post-list-title {
  font-size: 1.9rem;
  margin: 0 0 0.7rem;
}

.post-list-title a {
  color: var(--link-color);
}

.post-list-title a:hover {
  text-decoration: underline;
}

.post-list-summary {
  margin: 0;
  color: var(--color-text-muted);
  font-family: var(--font-footer);
  font-size: 0.95rem;
  line-height: 1.75;
  /* Corta em 3 linhas no CSS em vez de truncar a string: um `truncate` pode
     cair no meio de um `$...$` e deixar um delimitador órfão para o KaTeX. */
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  overflow: hidden;
}

.post-list-item .post-tags {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.03em;
  margin-top: 1.1rem;
  margin-bottom: 0;
}

.post-list-empty {
  color: var(--color-text-muted);
  font-style: italic;
}

.term-cloud {
  list-style: none;
  padding: 0;
  margin: 3.5rem 0 2.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.term-cloud a {
  display: inline-block;
  padding: 0.45rem 0.85rem;
  border-radius: 8px;
  background-color: color-mix(in srgb, var(--color-text-muted) 18%, transparent);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.3;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.term-cloud a:hover {
  background-color: color-mix(in srgb, var(--link-color) 22%, transparent);
  color: var(--link-color);
}

.term-count {
  margin-left: 0.2rem;
  font-size: 0.7em;
  font-weight: 700;
  vertical-align: super;
  font-variant-numeric: tabular-nums;
}

.term-cloud-empty {
  color: var(--color-text-muted);
  font-style: italic;
}

.term-meta {
  font-family: var(--font-footer);
  font-size: 0.8rem;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
  margin-top: 0.6rem;
  margin-bottom: 0;
}

.term-list {
  list-style: none;
  padding: 0;
  margin: 2rem 0 2.5rem;
  display: grid;
  grid-template-columns: max-content 1fr;
  align-items: baseline;
  gap: 0.75rem 1.5rem;
}

.term-list li {
  display: contents;
}

.term-list .post-date {
  margin-right: 0;
  white-space: nowrap;
}

.term-list a {
  color: var(--link-color);
}

.term-list a:hover {
  text-decoration: underline;
}

.subtitle-text{
  font-family: var(--font-footer);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-top: 0;
}

.header-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: color-mix(in srgb, var(--color-bg) 85%, transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0);
  transition: box-shadow 0.2s ease;
  width: 100%;
  /* A barra ocupa a viewport inteira, mas o conteúdo dela fica centrado numa
     medida própria — mais larga que a coluna de texto, para o logo e os links
     não parecerem espremidos no meio da tela. O max() garante o afastamento
     mínimo das bordas em janelas estreitas. Havia um `padding: 1rem 4.5rem`
     antes desta linha, morto: mesma propriedade, mesma regra. */
  padding: 1rem max(4.5rem, calc((100% - 1000px) / 2));
}

.header-nav.is-scrolled {
  box-shadow: var(--nav-shadow);
}

.header-nav-right {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.header-nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.header-nav a:hover {
  color: var(--link-color);
}

.rss-link,
.rss-link i {
  color: var(--color-rss);
}

.rss-link:hover,
.rss-link:hover i {
  color: color-mix(in srgb, var(--color-rss) 80%, var(--color-text));
}

.rss-icon {
  margin-right: 0.5rem;
}

.header-home-link {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: bold;
  display: inline-flex;
  align-items: center;
}

.header-home-link:hover {
  color: var(--link-color);
  text-decoration: none;
}

.header-logo {
  height: 1.8rem;
  width: auto;
  display: block;
}

/* Logo claro (texto preto) no tema claro; logo escuro (texto claro) no tema escuro */
.header-logo--dark {
  display: none;
}

:root[data-theme="dark"] .header-logo--light {
  display: none;
}

:root[data-theme="dark"] .header-logo--dark {
  display: block;
}

.page-title {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  margin: 5rem auto 2.5rem;
}

.title-center {
  text-align: center;
  font-family: var(--font-heading);
  font-size: 1.3rem;
  margin: 5rem auto 2.5rem;
}

.post-date {
  font-family: var(--font-footer);
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin-right: 1.5rem;
}

.footer-title {
  font-family: var(--font-heading);
  margin-bottom: 2.0rem;
}

.footer-text {
  font-family: var(--font-footer);
  text-align: center;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  line-height: 1.6;
}

.subtitle-separator {
  margin: 0 0.2rem;
}

.footer-separator {
  margin: 0 0.6rem;
  font-weight: 900;
}

.footer-nav {
  font-family: var(--font-footer);
  margin-bottom: 1.75rem;
  letter-spacing: 0.05em;
}

.footer-nav a {
  margin: 0 0.7rem;
}

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

.social-links {
  margin-bottom: 1.75rem;
}

.social-links a {
  color: var(--color-text-muted);
  margin: 0 0.5rem;
  font-size: 1.2rem;
}

.social-links a:hover {
  color: var(--link-color);
}

.pub-section-title {
  margin-top: 4rem;
}

.pub-grid {
  display: grid;
  gap: 2rem;
  margin-top: 0;
}

.pub-card {
  position: relative;
  overflow: hidden;
  border-radius: 12px;
  background-color: var(--color-bg2);
  border: 1px solid transparent;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.pub-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--card-shadow);
  border-color: color-mix(in srgb, var(--color-text-muted) 28%, transparent);
}

/* O foco de teclado cai no título, mas o contorno pertence ao cartão. */
.pub-card:has(.pub-card-title a:focus-visible) {
  outline: 2px solid var(--link-color);
  outline-offset: 3px;
}

.pub-card-title a:focus-visible {
  outline: none;
}

.pub-card-cover {
  display: block;
  aspect-ratio: 70 / 26;
  background-color: color-mix(in srgb, var(--color-text-muted) 12%, transparent);
}

.pub-card-cover img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.pub-card-body {
  padding: 1.4rem 1.6rem 1.5rem;
}

.pub-badge {
  display: inline-block;
  padding: 0.2rem 0.8rem;
  border-radius: 999px;
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--link-color);
  background-color: color-mix(in srgb, var(--link-color) 14%, transparent);
}

.pub-card-title {
  margin: 0.8rem 0 0;
  font-family: var(--font-heading);
  font-size: 1.35rem;
  line-height: 1.3;
}

.pub-card-title a {
  color: var(--color-text);
}

.pub-card-title a::after {
  content: "";
  position: absolute;
  inset: 0;
}

.pub-card:hover .pub-card-title a {
  color: var(--link-color);
}

.pub-card-summary {
  margin: 0.6rem 0 0;
  font-family: var(--font-footer);
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--color-text-muted);
}

.pub-card-meta {
  margin-top: 1.1rem;
  padding-top: 0.9rem;
  border-top: 1px solid color-mix(in srgb, var(--color-text-muted) 25%, transparent);
  font-family: var(--font-footer);
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--color-text-muted);
}

.pub-card-links {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin-top: 0.9rem;
  font-family: var(--font-body);
  font-size: 0.85rem;
}

.pub-card-links a {
  color: var(--link-color);
}

.pub-card-links a:hover {
  text-decoration: underline;
}

.pub-card-arrow {
  display: inline-block;
  transition: transform 0.18s ease;
}

.pub-card:hover .pub-card-arrow {
  transform: translateX(4px);
}

.pub-authors {
  font-family: var(--font-footer);
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* Bloco recolhível com a citação do artigo. */
.citation {
  margin: 2rem 0;
  padding: 0.9rem 1.15rem;
  border: 1px solid color-mix(in srgb, var(--color-text-muted) 30%, transparent);
  border-radius: 10px;
}

.citation summary {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 700;
  /* Tira o triângulo padrão para usar a seta própria abaixo. */
  list-style: none;
}

.citation summary::-webkit-details-marker {
  display: none;
}

/* Seta desenhada com duas bordas: aponta para a direita fechada e gira
   para baixo ao abrir. */
.citation summary::before {
  content: "";
  width: 0.4em;
  height: 0.4em;
  border-right: 2px solid var(--color-text-muted);
  border-bottom: 2px solid var(--color-text-muted);
  transform: rotate(-45deg);
  transition: transform 0.18s ease;
}

.citation[open] summary::before {
  transform: rotate(45deg);
}

.citation summary:focus-visible {
  outline: 2px solid var(--link-color);
  outline-offset: 3px;
  border-radius: 4px;
}

/* flow-root cria um contexto de formatação próprio: sem ele o margin-top
   do primeiro .citation-label escaparia do wrapper e o scrollHeight medido
   pelo JS sairia menor que a altura real, cortando o fim da animação. */
.citation-body {
  display: flow-root;
}

.citation-label {
  margin: 1.2rem 0 0;
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

/* O botão é posicionado sobre o canto do bloco; o wrapper é criado pelo
   copy-citation.js, então só existe quando o botão existe. */
.citation-copy-wrap {
  position: relative;
  margin-top: 0.5rem;
}

.citation-copy {
  position: absolute;
  top: 1.4rem;
  right: 0.7rem;
  padding: 0.25rem 0.7rem;
  border: 1px solid color-mix(in srgb, var(--color-text-muted) 35%, transparent);
  border-radius: 6px;
  background-color: var(--color-bg);
  color: var(--color-text-muted);
  font-family: var(--font-body);
  font-size: 0.75rem;
  line-height: 1.5;
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.citation-copy:hover {
  color: var(--link-color);
  border-color: var(--link-color);
}

.citation-copy:focus-visible {
  outline: 2px solid var(--link-color);
  outline-offset: 2px;
}

.citation-copy.is-done {
  color: var(--link-color);
  border-color: var(--link-color);
}

.citation-text {
  margin: 0.9rem 0 0;
  padding: 1rem 5.5rem 1rem 1.15rem;
  border-radius: 8px;
  background-color: var(--color-bg2);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.75;
  /* A citação é um parágrafo longo: quebra de linha em vez de barra de
     rolagem horizontal, que obrigaria a arrastar para copiar o final. */
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

/* BibTeX é um registro estruturado: quebrar as linhas embaralharia os
   campos. Rola na horizontal, e o botão copia tudo de qualquer forma. */
.citation-text--code {
  white-space: pre;
  overflow-x: auto;
  overflow-wrap: normal;
  font-size: 0.78rem;
  line-height: 1.65;
}

.pub-empty {
  color: var(--color-text-muted);
  font-style: italic;
}

/* Abaixo disso cada coluna ficaria com menos de ~250px. */
@media (max-width: 820px) {
  .home-columns {
    grid-template-columns: 1fr;
    gap: 3.5rem;
  }
}

@media (max-width: 640px) {
  .home-section-title--main {
    margin-top: 3rem;
  }

  blockquote {
    margin-left: 0.75rem;
    padding-left: 1.1rem;
  }
}

@media (max-width: 640px) {
  header h1 {
    font-size: 2.25rem;
  }

  main h1 {
    font-size: 1.65rem;
  }

  .page-title h1,
  .title-center h1 {
    font-size: 2rem;
  }

  main {
    padding: 0 1.25rem;
  }

  .header-nav {
    padding: 1rem 1.25rem;
  }

  .nav-toggle {
    display: block;
  }

  .header-nav-links {
    visibility: hidden;
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem 0 1.5rem;
    background-color: color-mix(in srgb, var(--color-bg) 98%, transparent);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--color-bg2);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
  }

  .header-nav-links.is-open {
    visibility: visible;
    opacity: 1;
    transform: none;
  }

  .page-title,
  .title-center {
    margin: 2.5rem auto 1.5rem;
  }

  .post-list-item {
    flex-direction: column;
    gap: 1.25rem;
  }

  .pub-section-title {
    margin-top: 2.75rem;
  }

  .pub-grid {
    gap: 1.5rem;
  }

  .pub-card-body {
    padding: 1.15rem 1.15rem 1.25rem;
  }

  .pub-card-title {
    font-size: 1.2rem;
  }

  .post-list-thumb {
    order: -1;
    flex: none;
    width: 100%;
  }

  .post-list-thumb img {
    aspect-ratio: 16 / 9;
  }

  .post-list-title {
    font-size: 1.5rem;
  }

  .home-section {
    margin-top: 3rem;
  }

  .home-post-card {
    padding: 1rem 1.1rem;
  }

  .home-post-title {
    font-size: 1.15rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .header-nav-links,
  .home-post-card,
  .home-post-more-arrow,
  .pub-card,
  .pub-card-arrow,
  .citation summary::before,
  .citation-copy {
    transition: none;
  }

  .home-post-card:hover {
    transform: none;
  }

  .pub-card:hover {
    transform: none;
  }

  .pub-card:hover .pub-card-arrow {
    transform: none;
  }

  .home-post-more:hover .home-post-more-arrow {
    transform: none;
  }
}