:root {
  --navy: #1f3a7a;
  --navy-soft: #edf3ff;
  --coral: #e8593c;
  --text: #1f2328;
  --muted: #57606a;
  --line: #dee2e6;
  --surface: #ffffff;
  --surface-alt: #f8f9fa;
  --green-soft: #e6f4ec;
  --code-bg: #0d1117;
  --code-text: #e6edf3;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--surface);
  color: var(--text);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 19px;
  line-height: 1.8;
}

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

a:hover {
  text-decoration: underline;
}

img {
  display: block;
  max-width: 100%;
}

code,
pre,
button,
.topbar,
.post-meta,
.tag,
.category-badge,
.toc-shell,
.copy-button {
  font-family: Inter, Arial, sans-serif;
}

#progress-track {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: rgba(31, 58, 122, 0.08);
  z-index: 100;
}

#progress-bar {
  width: 0;
  height: 100%;
  background: var(--navy);
}

.topbar {
  position: sticky;
  top: 3px;
  z-index: 50;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 28px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(222, 226, 230, 0.9);
  font-size: 15px;
}

.topbar a {
  font-weight: 600;
}

.page-shell {
  width: min(1240px, calc(100% - 32px));
  margin: 0 auto;
  display: grid;
  grid-template-columns: 250px minmax(0, 720px);
  gap: 44px;
  padding: 36px 0 64px;
}

.toc-shell {
  position: sticky;
  top: 90px;
  align-self: start;
  font-size: 14px;
}

.toc-card {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface-alt);
  padding: 18px;
}

.toc-title {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

#read-remaining {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 13px;
}

#toc-list,
#toc-mobile-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

#toc-list li,
#toc-mobile-list li {
  margin: 0 0 10px;
}

#toc-list a,
#toc-mobile-list a {
  display: inline-flex;
  width: 100%;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
}

#toc-list a::after,
#toc-mobile-list a::after {
  content: "................................";
  overflow: hidden;
  color: rgba(87, 96, 106, 0.35);
}

#toc-list a span,
#toc-mobile-list a span {
  background: var(--surface-alt);
  position: relative;
  z-index: 1;
}

#toc-list a.is-active,
#toc-mobile-list a.is-active {
  color: var(--navy);
  font-weight: 700;
}

.article-wrap {
  min-width: 0;
}

.mobile-toc {
  display: none;
  margin-bottom: 28px;
}

#toc-toggle {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 14px;
  background: var(--surface-alt);
  color: var(--text);
  text-align: left;
  font-size: 15px;
  font-weight: 600;
}

#toc-mobile {
  max-height: 0;
  overflow: hidden;
  transition: max-height 220ms ease;
  border-radius: 0 0 12px 12px;
  background: var(--surface-alt);
}

#toc-mobile.is-open {
  max-height: 420px;
  padding: 14px;
  border: 1px solid var(--line);
  border-top: none;
}

.post-header {
  margin-bottom: 28px;
}

.category-badge {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--navy);
  color: #fff;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 700;
}

h1,
h2,
h3 {
  font-family: Inter, Arial, sans-serif;
  line-height: 1.15;
  color: #0d1117;
}

h1 {
  margin: 18px 0 14px;
  font-size: 40px;
  font-weight: 800;
  letter-spacing: -0.04em;
}

.subheadline {
  margin: 0 0 16px;
  font-size: 23px;
  color: #2f363d;
  line-height: 1.45;
}

.post-meta {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 15px;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.tag {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 12px;
  color: var(--muted);
  background: #fff;
}

.hero-figure {
  margin: 0 0 30px;
}

.hero-figure img {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--line);
}

.hero-figure figcaption {
  margin-top: 10px;
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}

article.post-content p,
article.post-content li {
  margin: 0 0 22px;
}

article.post-content ul,
article.post-content ol {
  padding-left: 24px;
}

h2 {
  margin: 54px 0 20px;
  padding-left: 16px;
  border-left: 3px solid var(--navy);
  font-size: 28px;
  font-weight: 800;
}

h3 {
  margin: 38px 0 12px;
  font-size: 22px;
  font-weight: 750;
  color: var(--navy);
}

.callout {
  margin: 24px 0;
  padding: 16px 20px;
  border-left: 4px solid var(--navy);
  border-radius: 0 8px 8px 0;
  background: var(--navy-soft);
  color: #111133;
  font-style: italic;
}

.results-table-wrap {
  margin: 28px 0;
  overflow-x: auto;
}

.results-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 16px;
}

.results-table th,
.results-table td {
  padding: 12px 16px;
  border: 1px solid var(--line);
  text-align: left;
}

.results-table thead th {
  background: var(--navy);
  color: #fff;
}

.results-table tbody tr:nth-child(odd) {
  background: var(--surface-alt);
}

.results-table td.confidence-cell {
  background: var(--green-soft);
}

pre {
  position: relative;
  margin: 24px 0 14px;
  padding: 18px 18px 18px;
  border-radius: 8px;
  overflow-x: auto;
  background: var(--code-bg);
  color: var(--code-text);
  font-family: "JetBrains Mono", "Fira Code", "Courier New", monospace;
  font-size: 14px;
  line-height: 1.7;
}

pre code {
  display: block;
  white-space: pre;
}

.copy-button {
  position: absolute;
  top: 10px;
  right: 10px;
  border: 1px solid rgba(230, 237, 243, 0.22);
  border-radius: 8px;
  padding: 6px 10px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--code-text);
  font-size: 12px;
  font-weight: 600;
}

.token-keyword {
  color: var(--coral);
}

.token-string {
  color: #7ee787;
}

.token-comment {
  color: #8b949e;
}

.inline-code {
  display: block;
  margin: 20px 0;
}

.footer-block {
  margin-top: 56px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
  font-size: 16px;
}

.footer-block h3 {
  margin-top: 24px;
}

.post-nav {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 32px;
}

.post-nav a,
.post-nav span {
  color: #8c959f;
  font-family: Inter, Arial, sans-serif;
  font-size: 14px;
}

.disabled-nav {
  pointer-events: none;
}

@media (prefers-color-scheme: dark) {
  body {
    background: #0d1117;
    color: #e6edf3;
  }

  a {
    color: #58a6ff;
  }

  .topbar,
  .toc-card,
  #toc-toggle,
  #toc-mobile,
  .results-table tbody tr:nth-child(odd),
  .tag,
  .category-badge,
  .hero-figure img,
  .results-table td,
  .results-table th,
  .post-nav a,
  .post-nav span {
    border-color: #30363d;
  }

  .topbar,
  .toc-card,
  #toc-toggle,
  #toc-mobile,
  .tag,
  .hero-figure img {
    background: #161b22;
  }

  h1,
  h2,
  h3,
  #toc-toggle,
  .copy-button {
    color: #e6edf3;
  }

  .subheadline,
  .post-meta,
  .hero-figure figcaption,
  #read-remaining,
  .toc-title,
  #toc-list a,
  #toc-mobile-list a,
  .tag,
  .post-nav a,
  .post-nav span {
    color: #9da7b3;
  }

  .callout {
    background: #161b22;
    border-left-color: #58a6ff;
    color: #dce8ff;
  }

  .results-table thead th {
    background: #1f3a7a;
  }

  .results-table tbody tr:nth-child(odd) {
    background: #11161d;
  }

  .results-table td.confidence-cell {
    background: rgba(46, 160, 67, 0.18);
  }

  .footer-block {
    border-top-color: #30363d;
  }
}

@media (max-width: 767px) {
  body {
    font-size: 17px;
  }

  .page-shell {
    width: min(100%, calc(100% - 32px));
    grid-template-columns: 1fr;
    gap: 20px;
    padding-top: 20px;
  }

  .toc-shell {
    display: none;
  }

  .mobile-toc {
    display: block;
  }

  .topbar {
    padding: 14px 16px;
  }

  h1 {
    font-size: 34px;
  }

  h2 {
    font-size: 26px;
  }

  .subheadline {
    font-size: 20px;
  }

  .post-nav {
    flex-direction: column;
  }
}

@media print {
  #progress-track,
  .topbar,
  .toc-shell,
  .mobile-toc,
  .copy-button {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
    font-size: 12pt;
    max-width: 100%;
  }

  .page-shell {
    display: block;
    width: 100%;
    padding: 0;
  }

  a {
    color: #000;
  }
}