/* ============================================================
   CSS Custom Properties — Light theme (default)
   ============================================================ */
:root {
  --bg:           #ffffff;
  --bg-secondary: #f7f7f7;
  --text:         #1a1a1a;
  --text-muted:   #6b7280;
  --border:       #e5e7eb;
  --accent:       #2563eb;
  --accent-hover: #1d4ed8;
  --tag-bg:       #eff6ff;
  --tag-text:     #1d4ed8;
  --code-bg:      #f3f4f6;
  --code-text:    #1f2937;

  /* Syntax highlighting */
  --sh-bg:          #f8f9fa;
  --sh-border:      #e5e7eb;
  --sh-comment:     #6b7280;
  --sh-keyword:     #7c3aed;
  --sh-string:      #059669;
  --sh-number:      #dc2626;
  --sh-function:    #2563eb;
  --sh-punctuation: #374151;
  --sh-operator:    #374151;
}

/* Dark theme via media query (auto) */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg:           #111111;
    --bg-secondary: #1c1c1c;
    --text:         #e5e7eb;
    --text-muted:   #9ca3af;
    --border:       #2d2d2d;
    --accent:       #60a5fa;
    --accent-hover: #93c5fd;
    --tag-bg:       #1e3a5f;
    --tag-text:     #93c5fd;
    --code-bg:      #1e1e1e;
    --code-text:    #e5e7eb;

    --sh-bg:          #1a1a1a;
    --sh-border:      #2d2d2d;
    --sh-comment:     #8b949e;
    --sh-keyword:     #c084fc;
    --sh-string:      #34d399;
    --sh-number:      #f87171;
    --sh-function:    #60a5fa;
    --sh-punctuation: #d1d5db;
    --sh-operator:    #d1d5db;
  }
}

/* Dark theme via manual toggle */
[data-theme="dark"] {
  --bg:           #111111;
  --bg-secondary: #1c1c1c;
  --text:         #e5e7eb;
  --text-muted:   #9ca3af;
  --border:       #2d2d2d;
  --accent:       #60a5fa;
  --accent-hover: #93c5fd;
  --tag-bg:       #1e3a5f;
  --tag-text:     #93c5fd;
  --code-bg:      #1e1e1e;
  --code-text:    #e5e7eb;

  --sh-bg:          #1a1a1a;
  --sh-border:      #2d2d2d;
  --sh-comment:     #8b949e;
  --sh-keyword:     #c084fc;
  --sh-string:      #34d399;
  --sh-number:      #f87171;
  --sh-function:    #60a5fa;
  --sh-punctuation: #d1d5db;
  --sh-operator:    #d1d5db;
}

/* Light theme forced via toggle */
[data-theme="light"] {
  --bg:           #ffffff;
  --bg-secondary: #f7f7f7;
  --text:         #1a1a1a;
  --text-muted:   #6b7280;
  --border:       #e5e7eb;
  --accent:       #2563eb;
  --accent-hover: #1d4ed8;
  --tag-bg:       #eff6ff;
  --tag-text:     #1d4ed8;
  --code-bg:      #f3f4f6;
  --code-text:    #1f2937;

  --sh-bg:          #f8f9fa;
  --sh-border:      #e5e7eb;
  --sh-comment:     #6b7280;
  --sh-keyword:     #7c3aed;
  --sh-string:      #059669;
  --sh-number:      #dc2626;
  --sh-function:    #2563eb;
  --sh-punctuation: #374151;
  --sh-operator:    #374151;
}

/* ============================================================
   Reset & Base
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  transition: background 0.2s ease, color 0.2s ease;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: inherit;
  text-decoration: underline;
  text-decoration-style: dashed;
  text-decoration-color: var(--accent);
  text-underline-offset: 3px;
}

a:hover {
  color: var(--accent);
  text-decoration-style: solid;
}

/* ============================================================
   Layout
   ============================================================ */
.container {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ============================================================
   Header
   ============================================================ */
.site-header {
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-title {
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.01em;
  transition: color 0.15s;
}

.site-title:hover {
  color: var(--accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color 0.15s;
}

.nav-links a:hover {
  color: var(--text);
}

.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.25rem 0.55rem;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.2;
  transition: border-color 0.15s, color 0.15s;
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ============================================================
   Main & Footer
   ============================================================ */
.site-main {
  flex: 1;
  padding: 3rem 0;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.site-footer a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.15s;
}

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

.footer-socials {
  display: flex;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.footer-socials a {
  font-size: 1.25rem;
}

/* ============================================================
   Homepage
   ============================================================ */
.home-header {
  margin-bottom: 3rem;
}

.home-header h1 {
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  margin-bottom: 0.4rem;
}

.site-description {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ============================================================
   Post list / cards
   ============================================================ */
.posts-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.post-card {
  border-bottom: 1px solid var(--border);
  padding: 2rem 0;
}

.post-card:first-child {
  padding-top: 0;
}

.post-card:last-child {
  border-bottom: none;
}

.post-card-meta {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.post-card-title {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.3;
  margin-bottom: 0.5rem;
}

.post-card-title a {
  color: var(--text);
  text-decoration: none;
  transition: color 0.15s;
}

.post-card-title a:hover {
  color: var(--accent);
}

.post-card-excerpt {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

.post-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.75rem;
}

/* ============================================================
   Tags
   ============================================================ */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
  background: var(--tag-bg);
  color: var(--tag-text);
  padding: 0.15rem 0.65rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 500;
  text-decoration: none;
  transition: opacity 0.15s;
  white-space: nowrap;
}

.tag:hover {
  opacity: 0.75;
}

.tag-count {
  opacity: 0.65;
}

.separator {
  opacity: 0.4;
}

.tags-page h1 {
  font-size: 1.75rem;
  font-weight: 600;
  letter-spacing: -0.025em;
  margin-bottom: 1.5rem;
}

.tags-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.tags-list .tag {
  font-size: 0.875rem;
  padding: 0.35rem 0.9rem;
}

/* ============================================================
   Per-tag page
   ============================================================ */
.tag-header {
  margin-bottom: 2.5rem;
}

.back-link {
  display: inline-block;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  margin-bottom: 0.75rem;
  transition: color 0.15s;
}

.back-link:hover {
  color: var(--accent);
}

.tag-header h1 {
  font-size: 1.75rem;
  font-weight: 600;
  letter-spacing: -0.025em;
}

/* ============================================================
   Single post
   ============================================================ */
.post-header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.post-title {
  font-size: 1.9rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 0.75rem;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

/* Post body — Georgia for reading comfort */
.post-content {
  font-family: Georgia, 'Times New Roman', serif;
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text);
  position: relative;
}

.post-content h2,
.post-content h3,
.post-content h4 {
  font-family: 'Inter', system-ui, sans-serif;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-top: 2rem;
  margin-bottom: 0.65rem;
  line-height: 1.3;
}

.post-content h2 { font-size: 1.35rem; }
.post-content h3 { font-size: 1.15rem; }
.post-content h4 { font-size: 1rem; }

.post-content p {
  margin-bottom: 1.25rem;
}

.post-content a {
  transition: color 0.15s;
}

.post-content a:hover {
  color: var(--accent);
}

.post-content ul,
.post-content ol {
  padding-left: 1.5rem;
  margin-bottom: 1.25rem;
}

.post-content li {
  margin-bottom: 0.35rem;
}

.post-content blockquote {
  border-left: 3px solid var(--accent);
  padding: 0.1rem 0 0.1rem 1rem;
  color: var(--text-muted);
  font-style: italic;
  margin: 1.5rem 0;
}

.post-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  display: block;
}

/* ============================================================
   Code
   ============================================================ */
.post-content code {
  font-family: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', ui-monospace, monospace;
  font-size: 0.84em;
  background: var(--code-bg);
  color: var(--code-text);
  padding: 0.15em 0.45em;
  border-radius: 4px;
}

.post-content pre {
  background: var(--sh-bg);
  border: 1px solid var(--sh-border);
  border-radius: 10px;
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  margin: 1.5rem 0;
  font-size: 0.875rem;
  line-height: 1.65;
}

.post-content pre code {
  background: none;
  padding: 0;
  font-size: inherit;
  color: var(--sh-punctuation);
  border-radius: 0;
}

/* ============================================================
   Table of Contents
   ============================================================ */
.toc {
  position: fixed;
  top: 7rem;
  width: 180px;
  max-height: calc(100vh - 6rem);
  overflow-y: auto;
  scrollbar-width: none;
  font-size: 0.76rem;
  line-height: 1.4;
}

.toc::-webkit-scrollbar {
  display: none;
}

.toc ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.toc-item {
  margin-bottom: 0.45rem;
}

.toc-h3 {
  padding-left: 0.75rem;
}

.toc-h4 {
  padding-left: 1.5rem;
}

.toc-link {
  color: var(--text-muted);
  text-decoration: none;
  display: block;
  transition: color 0.15s;
  opacity: 0.6;
}

.toc-link:hover {
  color: var(--text);
  opacity: 1;
}

.toc-link.toc-active {
  color: var(--accent);
  font-weight: 500;
  opacity: 1;
}

/* ============================================================
   Footnotes
   ============================================================ */
.footnote-ref a {
  text-decoration: none;
  color: var(--accent);
  font-size: 0.75em;
  font-weight: 600;
}

.footnotes {
  display: none;
}

/* Desktop sidenotes */
.footnote-sidenote {
  position: absolute;
  left: calc(100% + 24px);
  width: 200px;
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  opacity: 0.3;
  transition: opacity 0.2s;
}

.footnote-sidenote:hover {
  opacity: 1;
}

.footnote-sidenote-num {
  color: var(--accent);
  font-weight: 700;
  line-height: 1.5;
  flex-shrink: 0;
  align-self: stretch;
  border-right: 1px solid var(--border);
  padding-right: 0.5rem;
}

.footnote-sidenote-body {
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--text-muted);
}

/* Mobile inline toggle */
.footnote-inline {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin: 0.75rem 0 1rem;
  color: var(--text-muted);
}

.footnote-inline-num {
  font-size: 2.5rem;
  line-height: 1;
  color: var(--accent);
  opacity: 0.4;
  font-weight: 700;
  flex-shrink: 0;
}

.footnote-inline-body {
  font-size: 0.875rem;
  line-height: 1.6;
}

.footnote-inline-body p,
.footnote-sidenote-body p {
  margin: 0;
}

/* ============================================================
   Syntax highlighting (PrismJS token classes)
   ============================================================ */
.token.comment,
.token.prolog,
.token.doctype,
.token.cdata {
  color: var(--sh-comment);
  font-style: italic;
}

.token.keyword,
.token.atrule,
.token.attr-name {
  color: var(--sh-keyword);
}

.token.string,
.token.attr-value,
.token.char,
.token.builtin,
.token.inserted {
  color: var(--sh-string);
}

.token.number,
.token.boolean,
.token.constant,
.token.symbol,
.token.variable {
  color: var(--sh-number);
}

.token.function,
.token.deleted,
.token.class-name {
  color: var(--sh-function);
}

.token.punctuation {
  color: var(--sh-punctuation);
}

.token.operator,
.token.entity,
.token.url {
  color: var(--sh-operator);
}

.token.tag,
.token.selector {
  color: var(--sh-keyword);
}

.token.important,
.token.bold {
  font-weight: 600;
}

.token.italic {
  font-style: italic;
}

.token.namespace {
  opacity: 0.7;
}

/* ============================================================
   404 page
   ============================================================ */
.error-page {
  text-align: center;
  padding: 5rem 0;
}

.error-page h1 {
  font-size: 6rem;
  font-weight: 700;
  letter-spacing: -0.05em;
  color: var(--border);
  margin-bottom: 1rem;
  line-height: 1;
}

.error-page p {
  font-size: 1.05rem;
  color: var(--text-muted);
}

.error-page a {
  color: var(--accent);
  text-decoration: underline;
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 640px) {
  .home-header h1 {
    font-size: 1.6rem;
  }

  .post-title {
    font-size: 1.5rem;
  }

  .site-main {
    padding: 2rem 0;
  }

  .error-page h1 {
    font-size: 4rem;
  }
}

/* ============================================================
   Toys — grid page
   ============================================================ */
.toys-page .home-header {
  margin-bottom: 2.5rem;
}

.toys-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1.25rem;
}

.toy-card {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--text);
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.toy-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  box-shadow: 0 8px 24px color-mix(in srgb, var(--accent) 15%, transparent);
}

/* Square thumbnail */
.toy-card-image-wrap {
  width: 100%;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  background: var(--bg-secondary);
  flex-shrink: 0;
}

.toy-card-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.25s ease;
}

.toy-card:hover .toy-card-image {
  transform: scale(1.04);
}

.toy-card-no-image {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--bg-secondary), color-mix(in srgb, var(--accent) 12%, var(--bg-secondary)));
}

.toy-card-body {
  padding: 0.85rem 1rem 1rem;
}

.toy-card-title {
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -0.01em;
  margin-bottom: 0.35rem;
}

.toy-card-desc {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ============================================================
   Toys — individual post
   ============================================================ */
.toy-hero {
  margin-bottom: 2rem;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border);
  aspect-ratio: 16 / 9;
}

.toy-hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Back link reused from tag page is already defined above */

/* ============================================================
   Me page
   ============================================================ */
.me-page {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* Hero card */
.me-hero {
  text-align: center;
  padding: 3.5rem 2rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 16px;
}

.me-hero-title {
  font-size: clamp(1.5rem, 4.5vw, 2.25rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 1.25rem;
}

.me-hero-bio {
  color: var(--text-muted);
  line-height: 1.75;
  font-size: 0.95rem;
}

/* About card */
.me-about {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2.25rem;
}

.me-about-header {
  text-align: center;
  padding-bottom: 1.75rem;
  margin-bottom: 1.75rem;
  border-bottom: 1px solid var(--border);
}

.me-about-title {
  display: block;
  font-size: 1.6rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.4rem;
}

.me-about-subtitle {
  display: block;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.me-about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
}

.me-col-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.me-bio-text {
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 0.875rem;
  font-size: 0.875rem;
}

.me-bio-text a {
  color: var(--accent);
  text-decoration: none;
}

.me-bio-text a:hover {
  text-decoration: underline;
}

/* Skills */
.me-skills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.me-skill {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.75rem;
  padding: 0.3rem 0.6rem;
  line-height: 1;
}

.skill-emoji {
  display: inline-block;
  line-height: 1;
  transition: opacity 0.12s ease;
}

/* Find me card */
.me-section {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.75rem 2.25rem;
}

.me-section-title {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.me-socials {
  display: flex;
  gap: 1.25rem;
}

.me-social-link {
  font-size: 1.4rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.15s, transform 0.15s;
}

.me-social-link:hover {
  color: var(--accent);
  transform: translateY(-2px);
}

@media (max-width: 640px) {
  .me-hero {
    padding: 2.5rem 1.25rem;
  }

  .me-about {
    padding: 1.5rem;
  }

  .me-about-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .me-section {
    padding: 1.5rem;
  }
}

@media (max-width: 640px) {
  .toys-grid {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 0.875rem;
  }
}