:root {
  color-scheme: light dark;
  --bg: #f6f7f9;
  --bg-alt: #ffffff;
  --border: #d6dae1;
  --text: #1f2933;
  --text-muted: #52606d;
  --accent: #4f46e5;
  --accent-soft: rgba(79, 70, 229, 0.1);
  --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
  font-family: "Inter", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

/* Override Cayman theme's width constraints */
.main-content,
main#content,
.page-header + .main-content,
body .main-content {
  max-width: 95% !important;
  margin: 0 auto !important;
  padding: 2rem !important;
  width: 100% !important;
}

/* Force wider layout for GitHub Pages Cayman theme */
@media screen and (min-width: 64em) {
  .main-content {
    max-width: 95% !important;
    padding: 2rem 4rem !important;
    margin: 0 auto !important;
    font-size: 1.1rem !important;
  }
}

@media screen and (min-width: 42em) and (max-width: 64em) {
  .main-content {
    max-width: 95% !important;
    padding: 2rem 2rem !important;
    margin: 0 auto !important;
    font-size: 1.1rem !important;
  }
}

.home-page {
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  padding: 2.5rem 2rem;
}

.home-page__nav {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow);
  margin: 0 auto 2rem;
  max-width: 95%;
}

.home-page__nav-inner {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem 1.5rem;
  justify-content: space-between;
  padding: 1rem 1.75rem;
}

.home-page__brand {
  color: var(--text);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  text-decoration: none;
}

.home-page__brand:hover,
.home-page__brand:focus {
  color: var(--accent);
}

.home-page__nav-links {
  display: flex;
  gap: 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.home-page__nav-links li {
  margin: 0;
}

.home-page__nav-links a {
  color: var(--text);
  font-weight: 600;
  text-decoration: none;
}

.home-page__nav-links a:hover,
.home-page__nav-links a:focus {
  color: var(--accent);
}

#learning-collection {
  scroll-margin-top: 6rem;
}

.home-page__grid {
  max-width: 95%;
  margin: 0 auto;
  display: grid;
  gap: 2rem;
}

.home-page__column {
  display: flex;
  flex-direction: column;
}

.home-page__column--books,
.home-page__column--blog {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 24px;
  box-shadow: var(--shadow);
  min-height: 100%;
}

.home-page__column--books {
  overflow: hidden;
}

.home-page__column--books .bookshelf-header,
.home-page__column--books .bookshelf-footer {
  background: transparent;
  border: none;
  box-shadow: none;
  padding: 2rem 2.5rem 1.5rem;
}

.home-page__column--books .bookshelf-footer {
  padding: 1.5rem 2.5rem 2.25rem;
  text-align: left;
  color: var(--text-muted);
}

.home-page__column--books .bookshelf-header__content {
  max-width: 100%;
  margin: 0;
}

.home-page__column--books .bookshelf-layout {
  flex: 1;
  max-width: none;
  margin: 0;
  width: 100%;
  padding: 0 2.5rem 2.5rem;
}

.home-page__column--books .bookshelf-content {
  min-height: 420px;
}

.home-page__column--blog {
  padding: 2.5rem;
  gap: 2rem;
}

.home-blog__header h2 {
  margin: 0;
  font-size: 2.1rem;
}

.home-blog__description {
  margin: 0.75rem 0 0;
  color: var(--text-muted);
  line-height: 1.6;
}

.home-blog__list {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.home-blog__item {
  padding-bottom: 1.75rem;
  border-bottom: 1px solid var(--border);
}

.home-blog__item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.home-blog__item-title {
  margin: 0;
  font-size: 1.55rem;
}

.home-blog__item-title a {
  text-decoration: none;
  color: var(--text);
}

.home-blog__item-title a:hover,
.home-blog__item-title a:focus {
  color: var(--accent);
}

.home-blog__item-meta {
  margin: 0.45rem 0 0.9rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.home-blog__item-excerpt {
  margin: 0 0 1.1rem;
  color: var(--text);
  line-height: 1.7;
}

.home-blog__item-read-more {
  font-weight: 600;
  text-decoration: none;
  color: var(--accent);
}

.home-blog__item-read-more:hover,
.home-blog__item-read-more:focus {
  text-decoration: underline;
}

.home-blog__empty {
  margin: 0;
  color: var(--text-muted);
}

.home-blog__cta {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  padding: 0.85rem 1.6rem;
  border-radius: 999px;
  box-shadow: 0 12px 24px rgba(79, 70, 229, 0.18);
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.home-blog__cta:hover,
.home-blog__cta:focus {
  transform: translateY(-1px);
  box-shadow: 0 18px 30px rgba(79, 70, 229, 0.22);
  background: #4338ca;
}

.home-blog__cta:focus-visible {
  outline: 3px solid rgba(79, 70, 229, 0.35);
  outline-offset: 4px;
}

@media (min-width: 64em) {
  .home-page__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: stretch;
  }
}

.bookshelf-header {
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
  padding: 2rem 3rem 1.5rem;
  box-shadow: var(--shadow);
}

.bookshelf-header__content {
  max-width: 960px;
  margin: 0 auto;
}

.bookshelf-header h1 {
  margin: 0;
  font-size: 2.5rem;
}

.bookshelf-header__tagline {
  margin: 0.5rem 0 0;
  color: var(--text-muted);
  font-size: 1.05rem;
}

.bookshelf-layout {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(260px, 320px) 1fr;
  gap: 0;
  max-width: 95%;
  margin: 0 auto;
  width: 100%;
  padding: 2rem;
  box-sizing: border-box;
}

.bookshelf-sidebar {
  position: sticky;
  top: 1.5rem;
  align-self: start;
}

.bookshelf-sidebar__inner {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem;
  box-shadow: var(--shadow);
  max-height: calc(100vh - 4rem);
  overflow: auto;
}

.bookshelf-sidebar__intro h2 {
  margin: 0;
  font-size: 1.35rem;
}

.bookshelf-sidebar__intro p {
  margin: 0.5rem 0 1.25rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.bookshelf-navigation {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.bookshelf-book {
  border-top: 1px solid var(--border);
  padding-top: 1rem;
}

.bookshelf-book:first-child {
  border-top: none;
  padding-top: 0;
}

.bookshelf-book > h3 {
  margin: 0;
  font-size: 1.2rem;
}

.bookshelf-section {
  margin-top: 0.75rem;
}

.bookshelf-section summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--text-muted);
  list-style: none;
}

.bookshelf-section summary::marker {
  display: none;
}

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

.bookshelf-section summary::after {
  content: "▾";
  float: right;
  transition: transform 0.2s ease;
}

.bookshelf-section[open] summary::after {
  transform: rotate(-180deg);
}

.bookshelf-section ul {
  list-style: none;
  margin: 0.5rem 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.bookshelf-section a {
  display: block;
  text-decoration: none;
  color: var(--text);
  font-size: 0.95rem;
  padding: 0.35rem 0.5rem;
  border-radius: 8px;
  transition: background 0.15s ease, color 0.15s ease;
}

.bookshelf-section a:hover,
.bookshelf-section a:focus {
  background: var(--accent-soft);
  color: var(--accent);
  outline: none;
}

.bookshelf-section a.active {
  background: var(--accent);
  color: #fff;
}

.bookshelf-main {
  padding-left: 2rem;
}

.bookshelf-content {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2rem;
  box-shadow: var(--shadow);
  min-height: calc(100vh - 8rem);
  overflow: hidden;
}

.bookshelf-content h1,
.bookshelf-content h2,
.bookshelf-content h3 {
  color: var(--text);
}

.bookshelf-content h1 {
  font-size: 2rem;
}

.bookshelf-content h2 {
  font-size: 1.5rem;
}

.bookshelf-content h3 {
  font-size: 1.25rem;
}

.bookshelf-content p {
  line-height: 1.7;
  margin: 1rem 0;
  color: var(--text);
}

.bookshelf-content ul,
.bookshelf-content ol {
  padding-left: 1.25rem;
}

.bookshelf-content pre {
  background: #0f172a;
  color: #f8fafc;
  padding: 1rem;
  border-radius: 12px;
  overflow: auto;
}

.bookshelf-content code {
  background: rgba(15, 23, 42, 0.07);
  padding: 0.2rem 0.35rem;
  border-radius: 6px;
  font-family: "Fira Code", "Source Code Pro", monospace;
  font-size: 0.9rem;
}

.bookshelf-placeholder {
  text-align: center;
  color: var(--text-muted);
  padding: 3rem 1rem;
}

.bookshelf-status {
  background: rgba(15, 23, 42, 0.05);
  border-radius: 12px;
  padding: 1rem;
  margin-bottom: 1.5rem;
}

.bookshelf-status.error {
  background: rgba(220, 38, 38, 0.1);
  color: #991b1b;
}

.bookshelf-footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding: 1.5rem 3rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.bookshelf-footer a {
  color: var(--accent);
}

.bookshelf-header__blog-cta {
  margin: 0.75rem 0 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.bookshelf-header__blog-cta a {
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
}

.bookshelf-header__blog-cta a:hover,
.bookshelf-header__blog-cta a:focus {
  text-decoration: underline;
}

.blog-index {
  max-width: 90%;
  margin: 0 auto;
  padding: 3rem 2rem 4rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.blog-index__header h1 {
  margin-bottom: 0.75rem;
  font-size: 2.5rem;
}

.blog-index__description {
  margin: 0;
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 60ch;
}

.blog-index__list {
  display: grid;
  gap: 1.5rem;
}

.blog-index__item {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 1.75rem;
  box-shadow: var(--shadow);
}

.blog-index__item-title {
  margin: 0;
  font-size: 1.65rem;
}

.blog-index__item-title a {
  text-decoration: none;
  color: var(--text);
}

.blog-index__item-title a:hover,
.blog-index__item-title a:focus {
  color: var(--accent);
}

.blog-index__item-meta {
  margin: 0.35rem 0 1rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.blog-index__item-excerpt {
  margin: 0 0 1.25rem;
  color: var(--text);
  line-height: 1.7;
}

.blog-index__item-read-more {
  font-weight: 600;
  text-decoration: none;
  color: var(--accent);
}

.blog-index__item-read-more:hover,
.blog-index__item-read-more:focus {
  text-decoration: underline;
}

.blog-index__empty {
  color: var(--text-muted);
}

/* Override theme containers for blog posts */
.blog-post,
.main-content .blog-post,
article.blog-post {
  max-width: 95% !important;
  margin: 0 auto !important;
  padding: 3rem 2rem 4rem !important;
  width: 100% !important;
}

/* Additional container overrides */
.container,
.wrapper,
section.main-content {
  max-width: 95% !important;
  width: 100% !important;
}

.blog-post__header {
  margin-bottom: 2rem;
}

.blog-post__title {
  margin: 0;
  font-size: 2.75rem;
}

.blog-post__meta {
  margin: 0.75rem 0 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Ensure blog post content uses full width */
.blog-post__content,
.main-content .blog-post__content,
article .blog-post__content {
  font-size: 1.05rem !important;
  line-height: 1.8 !important;
  color: var(--text) !important;
  display: block !important;
  gap: 1.5rem !important;
  max-width: 100% !important;
  width: 100% !important;
  margin: 0 !important;
  padding: 0 !important;
}

.blog-post__content p {
  margin: 0;
}

.blog-post__nav {
  margin-top: 3rem;
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
}

.blog-post__nav-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding: 0;
  margin: 0;
}

.blog-post__nav-item {
  flex: 1 1 240px;
  min-width: 200px;
}

.blog-post__nav-link {
  display: block;
  width: 100%;
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  padding: 0.75rem 1rem;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--bg-alt);
  text-align: center;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

.blog-post__nav-link--prev {
  text-align: left;
}

.blog-post__nav-link--next {
  text-align: right;
}

.blog-post__nav-link:hover,
.blog-post__nav-link:focus {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  box-shadow: 0 10px 24px rgba(79, 70, 229, 0.18);
  outline: none;
}

@media (max-width: 960px) {
  .home-page {
    padding: 2rem 1.25rem;
  }

  .home-page__column--books,
  .home-page__column--blog {
    border-radius: 20px;
  }

  .home-page__column--books .bookshelf-header,
  .home-page__column--books .bookshelf-footer {
    padding: 1.75rem 1.75rem 1.25rem;
  }

  .home-page__column--books .bookshelf-footer {
    padding-bottom: 1.75rem;
  }

  .home-page__column--books .bookshelf-layout {
    padding: 0 1.75rem 1.75rem;
  }

  .home-page__column--books .bookshelf-content {
    min-height: 360px;
  }

  .home-page__column--blog {
    padding: 2rem 1.75rem;
  }

  .home-blog__header h2 {
    font-size: 1.9rem;
  }

  .home-blog__item-title {
    font-size: 1.4rem;
  }

  .bookshelf-layout {
    grid-template-columns: 1fr;
    padding: 1rem;
  }

  .bookshelf-sidebar {
    position: static;
  }

  .bookshelf-sidebar__inner {
    max-height: none;
  }

  .bookshelf-main {
    padding: 1.5rem 0 0;
  }

  .blog-index {
    padding: 2.5rem 1.25rem 3rem;
  }

  .blog-index__item {
    padding: 1.5rem;
  }

  .blog-post {
    padding: 2.5rem 1.25rem 3rem;
  }

  .blog-post__title {
    font-size: 2.25rem;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1220;
    --bg-alt: #111827;
    --border: #1f2937;
    --text: #e5e7eb;
    --text-muted: #9ca3af;
    --accent: #818cf8;
    --accent-soft: rgba(129, 140, 248, 0.16);
    --shadow: 0 20px 40px rgba(0, 0, 0, 0.45);
  }

  .bookshelf-content pre {
    background: #1e293b;
    color: #f8fafc;
  }

  .bookshelf-content code {
    background: rgba(148, 163, 184, 0.12);
  }

  .blog-index__item {
    background: rgba(17, 24, 39, 0.8);
  }
}

/* Enhanced table styling for better readability */
.blog-post__content table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  font-size: 0.95rem;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.blog-post__content th,
.blog-post__content td {
  padding: 1rem 1.25rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  line-height: 1.6;
}

.blog-post__content th {
  background: rgba(79, 70, 229, 0.08);
  font-weight: 600;
  color: var(--text);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.blog-post__content tbody tr:hover {
  background: rgba(79, 70, 229, 0.03);
}

.blog-post__content tbody tr:last-child td {
  border-bottom: none;
}

.color-pca-demo {
  display: grid;
  gap: 1.75rem;
  margin: 2rem 0;
}

.color-pca-demo__images {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: flex-start;
}

.color-pca-demo__images canvas {
  image-rendering: crisp-edges;
  border-radius: 0.5rem;
  border: 1px solid rgba(15, 23, 42, 0.12);
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.08);
  background: #fff;
}

.color-pca-demo__caption {
  font-size: 0.85rem;
  color: rgba(15, 23, 42, 0.7);
  margin-top: 0.35rem;
}

.color-pca-demo__plots {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 960px) {
  .color-pca-demo__plots {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.color-pca-demo__stats {
  padding: 1rem 1.25rem;
  border-radius: 0.75rem;
  background: rgba(79, 70, 229, 0.08);
  color: var(--text);
  font-size: 0.95rem;
  line-height: 1.5;
  box-shadow: inset 0 0 0 1px rgba(79, 70, 229, 0.18);
}

/* Better mobile table handling */
@media (max-width: 768px) {
  .home-page {
    padding: 1.75rem 1rem;
  }

  .home-page__grid {
    gap: 1.5rem;
  }

  .home-page__column--books .bookshelf-header,
  .home-page__column--books .bookshelf-footer {
    padding: 1.5rem 1.5rem 1.15rem;
  }

  .home-page__column--books .bookshelf-footer {
    padding-bottom: 1.5rem;
  }

  .home-page__column--books .bookshelf-layout {
    padding: 0 1.25rem 1.5rem;
  }

  .home-page__column--books .bookshelf-content {
    min-height: 320px;
  }

  .home-page__column--blog {
    padding: 1.75rem 1.25rem;
  }

  .home-blog__item {
    padding-bottom: 1.5rem;
  }

  .home-blog__item-title {
    font-size: 1.3rem;
  }

  .home-blog__cta {
    width: 100%;
    justify-content: center;
  }

  .blog-post__content table {
    font-size: 0.85rem;
    margin: 1.5rem 0;
  }
  
  .blog-post__content th,
  .blog-post__content td {
    padding: 0.75rem 0.85rem;
  }
  
  .blog-post {
    max-width: 95%;
    padding: 2rem 1rem 3rem;
  }
  
  .blog-index {
    max-width: 95%;
    padding: 2rem 1rem 3rem;
  }
}