/* ================================
   KTblog Design Improvements v2
   Hermes Palette - Dark Mode + TOC + Code Copy
   ================================ */

/* --- Dark Mode --- */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #1A1816;
    --color-bg-secondary: #2D2A24;
    --color-text: #E0D8D0;
    --color-text-muted: #8A8078;
    --color-accent: #C4622D;
    --color-accent-secondary: #A0896B;
    --color-border: #3A342E;
  }
  img {
    opacity: 0.9;
    transition: opacity 0.3s;
  }
  img:hover {
    opacity: 1;
  }
  .prose code {
    color: #D4813B;
  }
  ::selection {
    background: var(--color-accent);
    color: var(--color-bg);
  }
}

/* --- TOC Sidebar --- */
.toc-wrapper {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
}
.toc {
  position: sticky;
  top: 80px;
  flex: 0 0 200px;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
  padding: 0.5rem 0 0.5rem 0;
  font-size: 0.8125rem;
}
.toc-title {
  font-weight: 600;
  margin-bottom: 0.75rem;
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
}
.toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.toc-list li {
  margin-bottom: 0.25rem;
}
.toc-list a {
  color: var(--color-text-muted);
  text-decoration: none;
  display: block;
  padding: 0.2rem 0;
  border-left: 1px solid var(--color-border);
  padding-left: 0.75rem;
  transition: all 0.15s ease;
}
.toc-list a:hover {
  color: var(--color-accent);
  border-left-color: var(--color-accent);
}
.toc-list a.active {
  color: var(--color-accent);
  border-left-color: var(--color-accent);
  font-weight: 500;
}
.toc-list .toc-h3 {
  padding-left: 1.5rem;
  font-size: 0.75rem;
}

/* --- Code Copy Button --- */
.code-copy-btn {
  position: absolute;
  top: 6px;
  right: 6px;
  padding: 3px 10px;
  font-size: 0.6875rem;
  font-family: var(--font-sans);
  color: var(--color-text-muted);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.2s;
  z-index: 10;
}
.prose pre {
  position: relative;
}
.prose pre:hover .code-copy-btn {
  opacity: 1;
}
.code-copy-btn:hover {
  background: var(--color-bg-secondary);
  color: var(--color-text);
}
.code-copy-btn.copied {
  background: var(--color-accent);
  color: var(--color-bg);
  border-color: var(--color-accent);
}

/* --- Footer (add to index/about if missing) --- */
.site-footer {
  border-top: 1px solid var(--color-border);
  margin-top: 4rem;
  padding: 2rem 0;
  text-align: center;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* --- Reading Time Badge --- */
.reading-time {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  white-space: nowrap;
}


/* --- Mobile Responsive: Nav --- */
@media (max-width: 640px) {
  header nav {
    flex-wrap: wrap;
    gap: 0.5rem;
  }
  header nav ul {
    gap: 0.75rem;
    flex-wrap: wrap;
  }
  header nav ul a {
    font-size: 0.8125rem;
  }
}

/* --- Mobile Responsive: Article Cards --- */
@media (max-width: 640px) {
  article.group a.block > div > div:first-child,
  .flex.items-center.gap-3.text-xs {
    flex-wrap: wrap;
    gap: 0.25rem;
  }
  article.group a.block h2 {
    font-size: 1.125rem;
    word-break: break-word;
  }
}

/* --- Mobile Responsive: Article Content (prose) --- */
@media (max-width: 640px) {
  .prose {
    font-size: 16px;
    line-height: 1.7;
  }
  .prose h2 {
    font-size: 1.375rem;
  }
  .prose h3 {
    font-size: 1.125rem;
  }
  .prose pre {
    font-size: 0.75rem;
    padding: 0.75rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  .prose img {
    max-width: 100%;
    height: auto;
  }
  .prose table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
}
/* --- Ensure prose fits viewport --- */
.toc-wrapper .prose,
main .prose {
  min-width: 0;
  max-width: 100%;
  overflow-wrap: break-word;
}
/* --- Global overflow guard --- */
img, video, iframe, pre, table {
  max-width: 100%;
}

/* --- Ensure article cards stay within viewport --- */
article.group {
  min-width: 0;
  max-width: 100%;
}
article.group a.block {
  min-width: 0;
}

/* --- Responsive TOC --- */
@media (max-width: 768px) {
  .toc-wrapper {
    flex-direction: column;
  }
  .toc {
    position: static;
    flex: none;
    max-height: none;
    width: 100%;
  }
}

/* --- Smooth transition for theme change --- */
body {
  transition: background-color 0.3s ease, color 0.3s ease;
}