/* ============================================
   Article — Material Design 3
   ============================================ */

.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 4px;
  background: var(--md-sys-color-primary);
  z-index: 101;
  transition: width 0.1s linear;
}

.article-page main {
  padding-top: 80px;
  padding-bottom: var(--space-4xl, 4rem);
}

.article-container {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Primary article surface as a card */
.article-page main > .article-container {
  margin-top: var(--space-xl, 2rem);
  margin-bottom: var(--space-3xl, 4rem);
  padding: 24px 24px 32px;
  background: var(--md-sys-color-surface-container-high);
  border-radius: var(--radius-xl);
  box-shadow: 0 16px 40px 0 var(--md-sys-color-shadow);
}

.article-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 500;
  line-height: 1;
  color: var(--md-sys-color-on-surface-variant);
  margin-block: 0 var(--space-lg);
  padding: 8px 0;
  min-height: 40px;
  border-radius: var(--radius-full);
  transition: color 0.2s, background 0.2s;
}

.article-back:hover {
  color: var(--md-sys-color-primary);
  background: var(--md-sys-color-surface-container-high);
  text-decoration: none;
}

.article-back::before {
  content: '';
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 0.5em;
  width: 0.5em;
  height: 0.5em;
  border-left: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
}

.article-title-wrap {
  margin-bottom: 24px;
}

.article-title {
  font-size: 2rem;
  font-weight: 400;
  line-height: 1.25;
  letter-spacing: 0;
  color: var(--md-sys-color-on-surface);
  margin-bottom: 8px;
}

.article-meta {
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--md-sys-color-on-surface-variant);
  margin-bottom: 32px;
}

.article-body {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--md-sys-color-on-surface);
}

.article-body > * + * {
  margin-top: 1rem;
}

.article-body h2 {
  font-size: 1.5rem;
  font-weight: 500;
  margin-top: 2.5rem;
  margin-bottom: 0.5rem;
  color: var(--md-sys-color-on-surface);
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 500;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

.article-body p {
  color: var(--md-sys-color-on-surface);
}

.article-body ul,
.article-body ol {
  padding-left: 1.5rem;
  margin: 0.75rem 0;
}

.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body li { margin: 0.25rem 0; }

.article-body blockquote {
  border-left: 4px solid var(--md-sys-color-primary);
  padding-left: 16px;
  margin: 1.25rem 0;
  color: var(--md-sys-color-on-surface-variant);
  font-style: italic;
}

.article-body a {
  color: var(--md-sys-color-primary);
}

.article-body a:hover {
  text-decoration: underline;
}

/* Inline code only (not code blocks with class="language-...") */
.article-body code:not([class*="language-"]) {
  font-family: 'Roboto Mono', 'Consolas', monospace;
  font-size: 0.9em;
  background: var(--code-bg);
  color: var(--code-fg);
  padding: 0.2em 0.4em;
  border-radius: 6px;
}

.article-body pre {
  margin: 1.25rem 0;
  border-radius: var(--radius-md);
  overflow: auto;
  background: var(--code-bg);
  position: relative;
}

.article-body pre code {
  display: block;
  padding: 16px;
  background: none;
  color: var(--code-fg);
  font-size: 0.875rem;
  line-height: 1.5;
  overflow-x: auto;
}

/* Prism.js overrides — keep our code background for theme consistency */
.article-body pre[class*="language-"],
.code-block-wrap pre {
  background: var(--code-bg) !important;
  margin: 1.25rem 0;
}

.article-body pre code.language-kotlin,
.article-body pre code.language-groovy,
.article-body pre code.language-swift,
.article-body pre code.language-bash {
  padding: 16px;
}

/* Copy button */
.code-block-wrap {
  position: relative;
  margin: 1.25rem 0;
}

.code-block-wrap pre {
  padding-top: 48px; /* room for the copy button */
}

.code-copy {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 2;
  padding: 8px 14px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--code-fg);
  background: rgba(255, 255, 255, 0.12);
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
  font-family: var(--md-sys-font-family);
}

.code-copy:hover {
  background: rgba(255, 255, 255, 0.22);
  color: var(--md-sys-color-on-surface);
}

.code-copy.copied {
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
}

[data-theme="dark"] .code-copy.copied {
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
}

.reveal-item {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.22s var(--ease-out-expo), transform 0.22s var(--ease-out-expo);
}

.reveal-item.revealed {
  opacity: 1;
  transform: translateY(0);
}

.article-body img {
  border-radius: var(--radius-md);
  margin: 1rem 0;
}

.article-body figure figcaption {
  font-size: 0.875rem;
  color: var(--md-sys-color-on-surface-variant);
  margin-top: 0.5rem;
  margin-bottom: 1rem;
}

.article-body-table {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin: 1.5rem 0;
}

.article-body-table figure {
  margin: 0;
}

.article-body-table img {
  margin: 0;
}

@media (max-width: 640px) {
  .article-body-table {
    grid-template-columns: 1fr;
  }
  .article-back {
    font-size: 1rem;
    min-height: 44px;
    padding: 10px 0;
    margin-block-end: var(--space-md);
  }
  .article-page main > .article-container {
    padding: 20px 16px 24px;
    border-radius: var(--radius-lg);
  }
}

/* Scrollbar styling for code blocks — dark theme (default) */
.article-body pre {
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.35) rgba(255, 255, 255, 0.08);
}

.article-body pre::-webkit-scrollbar {
  height: 10px;
}

.article-body pre::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.06);
  border-radius: 999px;
  margin: 0 12px;
}

.article-body pre::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.28);
  border-radius: 999px;
}

.article-body pre::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.45);
}

/* Light theme: code block visible bg, same corners as dark (radius-md) */
[data-theme="light"] .article-body pre[class*="language-"],
[data-theme="light"] .code-block-wrap pre {
  background: var(--code-bg) !important;
}

[data-theme="light"] .article-body pre {
  scrollbar-color: rgba(0, 0, 0, 0.2) rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .article-body pre::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.06);
  border-radius: 999px;
  margin: 0 12px;
}

[data-theme="light"] .article-body pre::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.28);
  border-radius: 999px;
}

[data-theme="light"] .article-body pre::-webkit-scrollbar-thumb:hover {
  background: rgba(0, 0, 0, 0.45);
}

[data-theme="light"] .code-copy {
  color: #1d1b20;
  background: rgba(0, 0, 0, 0.06);
  border: none;
}

[data-theme="light"] .code-copy:hover {
  background: rgba(0, 0, 0, 0.1);
  color: var(--md-sys-color-on-surface);
}

[data-theme="light"] .code-copy.copied {
  background: #4f378b;
  color: #eaddff;
}

/* Prism tokens — use M3 syntax variables (Kotlin, Groovy, Swift, Bash) */
.article-body pre .token.comment,
.article-body pre .token.prolog,
.article-body pre .token.doctype { color: var(--code-comment); }
.article-body pre .token.punctuation { color: var(--code-punctuation); }
.article-body pre .token.keyword { color: var(--code-keyword); }
.article-body pre .token.string,
.article-body pre .token.char { color: var(--code-string); }
.article-body pre .token.number { color: var(--code-number); }
.article-body pre .token.function { color: var(--code-function); }
.article-body pre .token.operator { color: var(--code-operator); }
.article-body pre .token.property { color: var(--code-property); }
.article-body pre .token.class-name { color: var(--code-class-name); }
.article-body pre .token.boolean { color: var(--code-boolean); }
.article-body pre .token.attr-name { color: var(--code-attr-name); }
.article-body pre .token.builtin { color: var(--code-builtin); }
.article-body pre .token.variable { color: var(--code-variable); }
.article-body pre .token.regex { color: var(--code-regex); }
.article-body pre .token.constant,
.article-body pre .token.symbol { color: var(--code-number); }
.article-body pre .token.tag { color: var(--code-keyword); }
.article-body pre .token.important { color: var(--code-number); }

/* Related posts at bottom of article */
.post-related {
  margin-top: var(--space-3xl, 3rem);
  padding-top: var(--space-2xl, 2rem);
  border-top: 1px solid var(--md-sys-color-outline-variant);
}

.post-related-title {
  font-size: 1.25rem;
  font-weight: 500;
  margin-bottom: 1rem;
}

.post-related-list {
  list-style: none;
  padding-left: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.post-related-link {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 6px;
  padding: 14px 16px;
  font-size: 0.95rem;
  color: var(--md-sys-color-on-surface);
  background: var(--md-sys-color-surface-container);
  border-radius: var(--radius-lg);
  box-shadow: none;
  border: 1px solid transparent;
  transition:
    background var(--duration-normal) var(--ease-out-expo),
    box-shadow var(--duration-normal) var(--ease-out-expo),
    transform var(--duration-normal) var(--ease-out-expo),
    border-color var(--duration-normal) var(--ease-out-expo);
}

.post-related-link time {
  display: block;
  font-size: 0.8rem;
  color: var(--md-sys-color-on-surface-variant);
}

.post-related-link:hover {
  background: var(--md-sys-color-surface-container-high);
  box-shadow: 0 8px 24px 0 var(--md-sys-color-shadow);
  transform: translateY(-2px);
  border-color: var(--md-sys-color-outline-variant);
  text-decoration: none;
}

/* Prevent nested container from becoming a second card */
.post-related .article-container {
  max-width: 760px;
  padding: 0 24px;
  background: transparent;
  box-shadow: none;
  border-radius: 0;
}

@media (max-width: 640px) {
  .post-related .article-container {
    padding: 0 16px;
  }
}