:root {
  --color-text: #333;
  --color-text-secondary: #666;
  --color-bg: #fafafa;
  --color-hover: #666;
  --color-border: #ddd;
  --color-accent: #0066cc;
  --code-bg: #ffffff;
  --sidebar-width-desktop: 240px;
  --sidebar-width-mobile: 140px;
  --content-max-width: 700px;
  --blog-content-max-width: 550px;
  --toc-width: 160px;
  --space-xs: 0.15rem;
  --space-sm: 0.25rem;
  --space-md: 0.5rem;
  --space-lg: 1rem;
  --space-xl: 1.5rem;
  --space-xxl: 2rem;
  --font-size-xs: clamp(8px, calc(0.45vw + 5px), 11px);
  --font-size-sm: clamp(9px, calc(0.5vw + 6px), 12px);
  --font-size-base: clamp(10px, calc(0.55vw + 7px), 14px);
  --font-size-md: clamp(11px, calc(0.6vw + 7px), 15px);
  --font-size-body: clamp(16px, calc(1vw + 12px), 20px);
  --shadow-sm: rgba(0, 0, 0, 0.06);
  --shadow-md: rgba(0, 0, 0, 0.16);
  --shadow-lg: rgba(0, 0, 0, 0.24);
}

:root[data-theme="dark"] {
  --color-text: #ccc;
  --color-text-secondary: #999;
  --color-bg: #0a0a0a;
  --color-hover: #999;
  --color-border: #333;
  --code-bg: #0f0f0f;
  --color-accent: #4d9fff;
  --shadow-sm: rgba(0, 0, 0, 0.2);
  --shadow-md: rgba(0, 0, 0, 0.35);
  --shadow-lg: rgba(0, 0, 0, 0.5);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-text: #ccc;
    --color-text-secondary: #999;
    --color-bg: #0a0a0a;
    --color-hover: #999;
    --color-border: #333;
    --code-bg: #0f0f0f;
    --color-accent: #4d9fff;
  }
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html { scroll-behavior: smooth; }

body {
  font-family: "InterVariable", -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  min-height: 100vh;
  padding-left: var(--sidebar-width-desktop);
  transition: padding-left 180ms ease;
}

h1, h2, h3, p, li { line-height: 1.4; }
h1 {
  font-size: var(--font-size-md);
  font-weight: 500;
  margin: 0 0 var(--space-md);
}
h2 {
  font-size: var(--font-size-base);
  font-weight: 500;
  margin: var(--space-lg) 0 var(--space-sm);
}
h3 {
  font-size: var(--font-size-sm);
  font-weight: 500;
  margin: 0.75rem 0 0.25rem;
}
p { margin: 0 0 var(--space-md); }
ul, ol { margin: 0.8rem 0; padding-left: 1rem; }
li { margin-bottom: 0.2rem; }

img, video { max-width: 100%; height: auto; }

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

pre {
  background: var(--code-bg);
  border: 1px solid var(--color-border);
  padding: 0.25rem;
  overflow-x: auto;
  font-size: var(--font-size-base);
  margin: var(--space-lg) 0;
  border-radius: 4px;
  position: relative;
}

code {
  font-family: "JetBrains MonoVariable", "JetBrains Mono", monospace;
  font-size: 0.9em;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  padding: var(--space-md);
  font-size: var(--font-size-sm);
  z-index: 1000;
}
.skip-link:focus { top: 6px; }

.main-content {
  padding: var(--space-xxl);
  font-size: var(--font-size-body);
  line-height: 1.6;
  width: 100%;
  max-width: var(--content-max-width);
  margin: 0 auto 0 0;
}

.sidebar {
  width: var(--sidebar-width-desktop);
  padding: var(--space-xxl);
  font-size: var(--font-size-sm);
  line-height: 1.3;
  text-transform: lowercase;
  height: 100vh;
  overflow-y: auto;
  position: fixed;
  top: 0;
  left: 0;
  color: var(--color-text);
}

.sidebar .header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.sidebar .name {
  font-weight: 500;
  font-size: var(--font-size-md);
}

.sidebar .theme-toggle {
  background: none;
  border: none;
  color: var(--color-text);
  cursor: pointer;
  padding: 0;
  font-size: var(--font-size-xs);
}

.sidebar .separator-line {
  position: relative;
  height: 2px;
  width: 100%;
  background: var(--color-border);
  margin: 0.3rem 0 var(--space-xl) 0;
}

.sidebar .separator-line .progress-bar {
  position: absolute;
  inset: 0;
  background: var(--color-text);
  transform-origin: left center;
  transform: scaleX(0);
}

.sidebar .role { margin: 0.3rem 0 1rem; }
.sidebar .contact { margin-bottom: var(--space-xs); }
.sidebar .section { margin-top: var(--space-xl); }
.sidebar .section-title { font-weight: 500; margin-bottom: 0.8rem; }
.sidebar .project-item { margin-left: 0.3rem; margin-bottom: 0.2rem; }
.sidebar .project-item a {
  color: var(--color-text-secondary);
  display: block;
  padding-left: 0.25rem;
}
.sidebar .project-item .current-post { color: var(--color-text); font-weight: 500; }
.sidebar .year-label { font-weight: 500; margin-top: 0.8rem; margin-bottom: var(--space-xs); }

.sidebar a:hover,
.blog-content a:hover {
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-thickness: 1px;
}

.blog-title,
.gallery-header h1 {
  font-size: var(--font-size-md);
  font-weight: 500;
  margin: 0 0 var(--space-xs) 0;
  text-transform: lowercase;
}
.blog-date {
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-lg);
  font-weight: 300;
}

.blog-content {
  font-size: var(--font-size-base);
  max-width: var(--blog-content-max-width);
}
.blog-content a { color: var(--color-accent); }
.blog-content figure { margin: var(--space-lg) 0; }
.blog-content :is(h2, h3, h4) { cursor: pointer; }
.blog-content figcaption {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  text-align: center;
  margin-top: var(--space-xs);
  font-style: italic;
}

[data-theme="dark"] img[data-should-invert="true"],
[data-theme="dark"] .blog-content img[src$=".svg"] { filter: invert(1); }

.gallery-subtitle {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-xl);
}

.gallery-masonry {
  columns: 2 240px;
  column-gap: var(--space-lg);
  max-width: 900px;
}

.gallery-item {
  break-inside: avoid;
  margin: 0 0 var(--space-lg);
}

.gallery-thumb {
  width: 100%;
  display: block;
  border: 1px solid var(--color-border);
  overflow: hidden;
  background: color-mix(in oklab, var(--color-bg) 95%, transparent);
}

.gallery-thumb img {
  display: block;
  width: 100%;
  height: auto;
}

.gallery-item figcaption {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-xs);
  text-transform: lowercase;
}

.toc-wrapper { position: relative; }
.toc {
  position: fixed;
  top: var(--space-lg);
  left: calc(var(--sidebar-width-desktop) + var(--blog-content-max-width) + 2.75rem);
  width: var(--toc-width);
  font-size: var(--font-size-xs);
  line-height: 1.3;
  text-transform: lowercase;
  border-left: 1px solid var(--color-border);
  background: transparent;
  padding: 0 0 0 0.4rem;
  z-index: 10;
}

.toc:has(ul:empty) { display: none; }
.toc-title {
  font-weight: 400;
  font-size: var(--font-size-xs);
  margin-bottom: 0.3rem;
  color: var(--color-text-secondary);
}
.toc-list, .toc-list ul {
  margin: 0;
  padding: 0;
  list-style: none;
}
.toc-item { margin-bottom: 0.08rem; }
.toc-link {
  display: block;
  color: var(--color-text-secondary);
  border-left: 1px solid transparent;
  padding: 0.04rem 0 0.04rem 0.32rem;
}
.toc-link:hover,
.toc-link.active {
  color: var(--color-text);
  border-left-color: var(--color-text);
  background: transparent;
}
.toc-depth-2 { margin-left: 0; opacity: 1; }
.toc-depth-3 { margin-left: 0.24rem; opacity: 0.9; }
.toc-depth-4 { margin-left: 0.48rem; opacity: 0.82; }

.toc-mobile-toggle, .toc-overlay { display: none; }

.post-nav {
  display: flex;
  justify-content: space-between;
  gap: var(--space-lg);
  margin-top: var(--space-xxl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
  max-width: var(--blog-content-max-width);
}
.post-nav-link {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  max-width: 45%;
}
.post-nav-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  text-transform: lowercase;
}
.post-nav-title {
  font-size: var(--font-size-sm);
  text-transform: lowercase;
}
.post-nav-next { text-align: right; margin-left: auto; }

.copy-button {
  position: absolute;
  top: 6px;
  right: 6px;
  border: 1px solid var(--color-border);
  background: color-mix(in oklab, var(--code-bg) 92%, transparent);
  color: var(--color-text-secondary);
  font-size: var(--font-size-xs);
  cursor: pointer;
  padding: 2px 6px;
  opacity: 0;
}
pre:hover .copy-button,
.copy-button:focus-visible { opacity: 1; }

.sidebar-toggle,
.scroll-to-top {
  position: fixed;
  bottom: var(--space-lg);
  color: var(--color-text);
  cursor: pointer;
}

.sidebar-toggle {
  bottom: var(--space-lg);
  left: calc(var(--sidebar-width-mobile) + var(--space-md));
  z-index: 50;
  background: color-mix(in oklab, var(--color-bg) 92%, white 8%);
  padding: var(--space-sm) var(--space-md);
  border-radius: 999px;
  font-size: var(--font-size-sm);
  text-transform: lowercase;
  display: none;
}

.scroll-to-top {
  right: var(--space-lg);
  width: 2.2rem;
  height: 2.2rem;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--color-border);
  width: auto;
  height: auto;
  padding: 0.1rem 0.2rem;
  font-size: var(--font-size-sm);
  opacity: 0;
  pointer-events: none;
}
.scroll-to-top.visible {
  opacity: 1;
  pointer-events: auto;
}

@media (max-width: 1050px) {
  .toc {
    position: static;
    left: auto;
    top: auto;
    width: auto;
    margin: var(--space-lg) 0;
  }

  .toc-wrapper[data-enhanced="true"] .toc {
    position: fixed;
    left: var(--space-lg);
    right: var(--space-lg);
    bottom: calc(var(--space-xl) + 56px);
    margin: 0;
    max-height: min(60vh, 320px);
    background: color-mix(in oklab, var(--color-bg) 96%, transparent);
    box-shadow: 0 12px 32px var(--shadow-md);
    overflow-y: auto;
    opacity: 0;
    pointer-events: none;
    transform: translateY(12px);
    transition: opacity 140ms ease, transform 140ms ease;
    z-index: 15;
  }

  .toc-wrapper[data-enhanced="true"][data-open="true"] .toc {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .toc-wrapper[data-enhanced="true"] .toc-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.35);
    z-index: 14;
  }

  .toc-wrapper[data-enhanced="true"] .toc-mobile-toggle {
    position: fixed;
    right: var(--space-lg);
    bottom: calc(var(--space-lg) + 56px);
    display: inline-flex;
    border: none;
    border-bottom: 1px solid var(--color-border);
    border-radius: 0;
    background: transparent;
    color: var(--color-text);
    font-size: var(--font-size-xs);
    text-transform: lowercase;
    padding: 0.15rem 0.05rem;
    z-index: 16;
  }
}

@media (max-width: 768px) {
  body { padding-left: var(--sidebar-width-mobile); }
  body.sidebar-collapsed { padding-left: 0; }
  .main-content { padding: var(--space-xl) var(--space-lg); max-width: none; }
  .sidebar { width: var(--sidebar-width-mobile); }
  .sidebar-toggle { display: inline-flex; }
  body.sidebar-collapsed .sidebar { display: none; }
  body.sidebar-collapsed .sidebar-toggle { left: var(--space-lg); }
}