/* ─────────────────────────────────────────────────────────────────────────
   Blog Styles
   Extends the global design system (styles.css + subpage-styles.css).
   Uses the same CSS custom properties — no new tokens introduced.
   ───────────────────────────────────────────────────────────────────────── */

/* ── Reading Progress Bar ──────────────────────────────────────────────── */

.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background-color: var(--primaryText);
  opacity: 0.4;
  z-index: 1000;
  transition: width 0.1s linear;
}

/* ── Blog Index ────────────────────────────────────────────────────────── */

.blog-post-list {
  display: flex;
  flex-direction: column;
  padding-top: calc(var(--lineHeight) * 0.5);
  padding-bottom: calc(var(--lineHeight) * 3);
}

.blog-list-item {
  padding: calc(var(--lineHeight) * 1.25) 0;
  border-bottom: var(--hairlineThickness) solid color(from var(--primaryText) srgb r g b / 0.08);
}

.blog-list-item:first-child {
  border-top: var(--hairlineThickness) solid color(from var(--primaryText) srgb r g b / 0.08);
}

.blog-list-item__meta {
  display: flex;
  align-items: center;
  gap: calc(var(--lineHeight) * 0.5);
  margin-bottom: calc(var(--lineHeight) * 0.3);
  flex-wrap: wrap;
}

.blog-list-item__date {
  font-size: var(--secondaryFontSize);
  color: var(--tertiaryText);
  font-feature-settings: "ss01" 1;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.blog-list-item__tags {
  display: flex;
  gap: calc(var(--lineHeight) * 0.3);
  flex-wrap: wrap;
}

.blog-list-item__title {
  font-size: calc(var(--fontSize) * 1.15);
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--primaryText);
  line-height: 1.35;
  margin-bottom: calc(var(--lineHeight) * 0.3);
}

.blog-list-item__title a {
  color: inherit;
  text-decoration: none;
  white-space: normal;
}

@media (hover: hover) {
  .blog-list-item__title a:hover {
    text-decoration: underline;
    text-decoration-thickness: var(--hairlineThickness);
    text-underline-offset: 3px;
  }
}

.blog-list-item__excerpt {
  color: var(--secondaryText);
  font-size: var(--fontSize);
  line-height: 1.65;
  margin-bottom: calc(var(--lineHeight) * 0.2);
  text-wrap: pretty;
}

.blog-list-item__reading-time {
  font-size: var(--secondaryFontSize);
  color: var(--tertiaryText);
}

/* ── Tag Pills ─────────────────────────────────────────────────────────── */

.tag-pill {
  display: inline-block;
  font-size: 10px;
  font-weight: 650;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--secondaryText);
  background-color: var(--secondaryBackgroundColor);
  border: var(--hairlineThickness) solid color(from var(--primaryText) srgb r g b / 0.1);
  border-radius: 100px;
  padding: 2px 10px;
  white-space: nowrap;
  transition: all 0.2s ease;
  cursor: default;
}

@media (hover: hover) {
  .tag-pill:hover {
    color: var(--primaryText);
    border-color: color(from var(--primaryText) srgb r g b / 0.2);
    background-color: color(from var(--primaryText) srgb r g b / 0.05);
  }
}

/* ── Individual Post ───────────────────────────────────────────────────── */

.post-article {
  padding-bottom: calc(var(--lineHeight) * 3);
}

.post-header {
  padding: calc(var(--lineHeight) * 3) 0 calc(var(--lineHeight) * 2);
  display: flex;
  flex-direction: column;
  gap: calc(var(--lineHeight) * 0.6);
}

.post-back {
  display: flex;
  justify-content: flex-start;
  margin-bottom: calc(var(--lineHeight) * 0.5);
}

.post-back a {
  color: var(--secondaryText);
  text-decoration: none;
  font-size: var(--secondaryFontSize);
  font-weight: 500;
  transition: all 0.2s ease;
  padding: 4px 14px;
  border-radius: 20px;
  background-color: var(--secondaryBackgroundColor);
  border: var(--hairlineThickness) solid color(from var(--primaryText) srgb r g b / 0.08);
  white-space: nowrap;
}

@media (hover: hover) {
  .post-back a:hover {
    color: var(--primaryText);
    border-color: color(from var(--primaryText) srgb r g b / 0.2);
    background-color: color(from var(--primaryText) srgb r g b / 0.02);
  }
}

.post-back a::after { display: none !important; }

.post-title {
  font-size: calc(var(--fontSize) * 2);
  font-weight: 680;
  letter-spacing: -0.03em;
  line-height: 1.2;
  color: var(--primaryText);
  text-wrap: balance;
}

@media screen and (min-width: 800px) {
  .post-title { font-size: calc(var(--fontSize) * 2.4); }
}

.post-meta {
  display: flex;
  align-items: center;
  gap: calc(var(--lineHeight) * 0.4);
  color: var(--tertiaryText);
  font-size: var(--secondaryFontSize);
  font-feature-settings: "ss01" 1;
  flex-wrap: wrap;
}

.post-author {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--primaryText);
}

.author-avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  object-fit: cover;
  border: var(--hairlineThickness) solid color(from var(--primaryText) srgb r g b / 0.1);
  margin: 0 !important; /* Override global img margin */
}

.author-name {
  font-weight: 580;
  letter-spacing: -0.01em;
}

.post-meta-sep { opacity: 0.4; }

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--lineHeight) * 0.3);
}

/* ── Post Prose ────────────────────────────────────────────────────────── */

.post-content {
  color: var(--secondaryText);
  line-height: 1.75;
  font-size: var(--fontSize);
}

.post-content > * + * { margin-top: calc(var(--lineHeight) * 1); }

.post-content p { text-wrap: pretty; }

.post-content h2 {
  font-size: calc(var(--fontSize) * 1.8);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--primaryText);
  line-height: 1.2;
  margin-top: calc(var(--lineHeight) * 2.5);
  margin-bottom: calc(var(--lineHeight) * 0.8);
  padding-bottom: calc(var(--lineHeight) * 0.3);
  border-bottom: var(--hairlineThickness) solid color(from var(--primaryText) srgb r g b / 0.1);
}

.post-content h3 {
  font-size: calc(var(--fontSize) * 1.3);
  font-weight: 650;
  letter-spacing: -0.02em;
  color: var(--primaryText);
  line-height: 1.3;
  margin-top: calc(var(--lineHeight) * 1.8);
  margin-bottom: calc(var(--lineHeight) * 0.4);
}

.post-content a {
  white-space: normal;
  word-break: break-word;
}

.post-content strong { color: var(--primaryText); font-weight: 580; }

.post-content blockquote {
  border-left: 2px solid color(from var(--primaryText) srgb r g b / 0.2);
  padding: calc(var(--lineHeight) * 0.5) calc(var(--lineHeight) * 1.25);
  margin: calc(var(--lineHeight) * 1.5) 0;
  color: var(--secondaryText);
  font-style: italic;
  background-color: color(from var(--primaryText) srgb r g b / 0.03);
  border-radius: 4px;
}

/* ── Markdown Alerts (GitHub Style) ───────────────────────────────────── */

.markdown-alert {
  padding: calc(var(--lineHeight) * 0.75) calc(var(--lineHeight) * 1.25);
  margin: calc(var(--lineHeight) * 1.5) 0;
  border-left: 3px solid var(--primaryText);
  border-radius: 6px;
  background-color: color(from var(--primaryText) srgb r g b / 0.03);
  font-style: normal;
  color: var(--primaryText);
}

.markdown-alert .markdown-alert-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 680;
  font-size: 0.95em;
  margin-bottom: 4px;
  text-transform: capitalize;
}

.markdown-alert p {
  margin: 0;
  font-size: 0.95em;
  line-height: 1.6;
  color: var(--secondaryText);
}

/* Alert Variants */
.markdown-alert.markdown-alert-note { border-left-color: #0969da; }
.markdown-alert.markdown-alert-note .markdown-alert-title { color: #0969da; }

.markdown-alert.markdown-alert-tip { border-left-color: #1a7f37; }
.markdown-alert.markdown-alert-tip .markdown-alert-title { color: #1a7f37; }

.markdown-alert.markdown-alert-important { border-left-color: #8250df; }
.markdown-alert.markdown-alert-important .markdown-alert-title { color: #8250df; }

.markdown-alert.markdown-alert-warning { border-left-color: #9a6700; }
.markdown-alert.markdown-alert-warning .markdown-alert-title { color: #9a6700; }

.markdown-alert.markdown-alert-caution { border-left-color: #d1242f; }
.markdown-alert.markdown-alert-caution .markdown-alert-title { color: #d1242f; }

@media (prefers-color-scheme: dark) {
  .markdown-alert.markdown-alert-note { border-left-color: #2f81f7; }
  .markdown-alert.markdown-alert-note .markdown-alert-title { color: #2f81f7; }

  .markdown-alert.markdown-alert-tip { border-left-color: #3fb950; }
  .markdown-alert.markdown-alert-tip .markdown-alert-title { color: #3fb950; }

  .markdown-alert.markdown-alert-important { border-left-color: #a371f7; }
  .markdown-alert.markdown-alert-important .markdown-alert-title { color: #a371f7; }

  .markdown-alert.markdown-alert-warning { border-left-color: #d29922; }
  .markdown-alert.markdown-alert-warning .markdown-alert-title { color: #d29922; }

  .markdown-alert.markdown-alert-caution { border-left-color: #f85149; }
  .markdown-alert.markdown-alert-caution .markdown-alert-title { color: #f85149; }
}

.post-content ul,
.post-content ol {
  padding-left: calc(var(--lineHeight) * 1.25);
}

.post-content ol {
  list-style-type: decimal;
}

.post-content ol li {
  padding-left: 0;
}

.post-content ol li::before {
  display: none;
}

.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-figure);
  display: block;
  margin: calc(var(--lineHeight) * 1.5) auto 0 auto;
}

.post-content .caption {
  text-align: center;
  font-size: var(--secondaryFontSize);
  color: var(--tertiaryText);
  font-style: italic;
  margin-top: calc(var(--lineHeight) * 0.5);
  margin-bottom: calc(var(--lineHeight) * 2);
  line-height: 1.5;
  text-wrap: balance;
}

.post-content hr {
  margin: calc(var(--lineHeight) * 2) 0;
}

/* ── Heading Anchors ───────────────────────────────────────────────────── */

.post-content .header-anchor {
  text-decoration: none;
  color: var(--tertiaryText);
  opacity: 0;
  margin-left: 0.5ch;
  transition: opacity 0.2s ease, transform 0.2s ease;
  font-size: 0.85em;
  font-weight: 400;
  display: inline-block;
  transform: translateX(-4px);
}

.post-content h2:hover .header-anchor,
.post-content h3:hover .header-anchor {
  opacity: 1;
  transform: translateX(0);
}

/* ── Shiki Code Blocks ─────────────────────────────────────────────────── */

.post-content pre {
  margin: calc(var(--lineHeight) * 1.25) 0;
  padding: calc(var(--lineHeight) * 1) calc(var(--lineHeight) * 1.1);
  border-radius: var(--radius-figure);
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.7;
  border: var(--hairlineThickness) solid color(from var(--primaryText) srgb r g b / 0.1);
}

/* Shiki dual-theme: show correct theme per color scheme */
.shiki,
.shiki span {
  color: var(--shiki-dark) !important;
  background-color: var(--shiki-dark-bg) !important;
  font-style: var(--shiki-dark-font-style) !important;
  font-weight: var(--shiki-dark-font-weight) !important;
  text-decoration: var(--shiki-dark-text-decoration) !important;
}

@media (prefers-color-scheme: light) {
  .shiki,
  .shiki span {
    color: var(--shiki-light) !important;
    background-color: var(--shiki-light-bg) !important;
    font-style: var(--shiki-light-font-style) !important;
    font-weight: var(--shiki-light-font-weight) !important;
    text-decoration: var(--shiki-light-text-decoration) !important;
  }
}

/* Inline code */
.post-content :not(pre) > code {
  font-family: ui-monospace, monospace;
  font-size: 0.88em;
  background-color: color(from var(--primaryText) srgb r g b / 0.07);
  border: var(--hairlineThickness) solid color(from var(--primaryText) srgb r g b / 0.1);
  border-radius: 4px;
  padding: 0.1em 0.4em;
  color: var(--primaryText);
}