:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f8f9fa;
  --color-text: #2d3436;
  --color-text-secondary: #636e72;
  --color-accent: #2d3436;
  --color-accent-hover: #636e72;
  --color-border: #e1e4e8;
  --color-header-bg: #2d3436;
  --color-header-text: #e6e6e6;
  --color-tag-bg: #f0f0f0;
  --color-tag-text: #2d3436;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --font-mono: 'SF Mono', SFMono-Regular, Consolas, 'Liberation Mono', Menlo, monospace;
  --max-width: 800px;
  --max-width-wide: 1000px;
  --radius: 8px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --transition: 0.2s ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

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

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

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--color-bg-alt);
  padding: 0.15em 0.4em;
  border-radius: 4px;
}

pre {
  background: #1e1e2e;
  color: #cdd6f4;
  padding: 1.25rem;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 1.5rem 0;
  font-size: 0.875rem;
  line-height: 1.6;
}

pre code {
  background: none;
  padding: 0;
  color: inherit;
}

/* ---- Header / Nav ---- */

.site-header {
  background: var(--color-header-bg);
  border-bottom: none;
  padding: 0;
}

.site-header .wrapper {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.site-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.02em;
}

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

.site-nav {
  display: flex;
  gap: 1.75rem;
  align-items: center;
}

.site-nav a {
  color: var(--color-header-text);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
  position: relative;
}

.site-nav a:hover {
  color: #fff;
}

.site-nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition);
}

.site-nav a:hover::after {
  width: 100%;
}

/* Mobile nav */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: #fff;
  margin: 5px 0;
  transition: var(--transition);
}

@media (max-width: 640px) {
  .nav-toggle {
    display: block;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-header-bg);
    flex-direction: column;
    padding: 1rem 1.5rem 1.5rem;
    gap: 0.75rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    z-index: 100;
  }

  .site-nav.open {
    display: flex;
  }

  .site-nav a::after {
    display: none;
  }
}

/* ---- Hero (Homepage) ---- */

.hero {
  background: var(--color-header-bg);
  color: #fff;
  padding: 4rem 1.5rem 3.5rem;
  text-align: center;
}

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.hero-avatar {
  width: 130px;
  height: 130px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid rgba(255,255,255,0.2);
  margin-bottom: 1.25rem;
}

.hero h1 {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
}

.hero .subtitle {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.7);
  margin-bottom: 1rem;
  line-height: 1.5;
}

.hero-links {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

.hero-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: rgba(255,255,255,0.8);
  font-size: 0.9rem;
  padding: 0.4rem 0.85rem;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 999px;
  transition: all var(--transition);
}

.hero-links a:hover {
  color: #fff;
  border-color: var(--color-accent);
  background: rgba(255, 255, 255, 0.1);
}

.hero-links svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

/* ---- Main Content ---- */

.page-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}

.page-content.wide {
  max-width: var(--max-width-wide);
}

/* ---- Section Headers ---- */

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-border);
}

/* ---- Page Content Styling ---- */

.page-content h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

.page-content h2 {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--color-border);
}

.page-content h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

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

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

.page-content li {
  margin-bottom: 0.5rem;
}

.page-content blockquote {
  border-left: 3px solid var(--color-accent);
  padding: 0.75rem 1.25rem;
  margin: 1.5rem 0;
  background: var(--color-bg-alt);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--color-text-secondary);
}

/* ---- Post List (Homepage) ---- */

.post-list {
  list-style: none;
  padding: 0;
}

.post-list li {
  margin-bottom: 0;
}

.post-card {
  display: block;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition);
}

.post-card:first-child {
  border-top: 1px solid var(--color-border);
}

.post-card-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.3rem;
  transition: color var(--transition);
}

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

.post-card-meta {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

.post-card-excerpt {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  margin-top: 0.4rem;
  line-height: 1.6;
}

/* ---- Tags ---- */

.tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 500;
  padding: 0.2rem 0.6rem;
  background: var(--color-tag-bg);
  color: var(--color-tag-text);
  border-radius: 999px;
  margin-right: 0.35rem;
  margin-bottom: 0.35rem;
}

/* ---- Post Single ---- */

.post-header {
  margin-bottom: 2rem;
}

.post-title {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.3;
  margin-bottom: 0.75rem;
}

.post-meta {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.post-content {
  font-size: 1.05rem;
}

.post-content img {
  border-radius: var(--radius);
  margin: 1.5rem 0;
  box-shadow: var(--shadow-sm);
}

/* ---- About Page ---- */

.about-header {
  display: flex;
  align-items: center;
  gap: 2rem;
  margin-bottom: 2rem;
}

.about-avatar {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  box-shadow: var(--shadow-md);
}

.about-intro h1 {
  font-size: 1.8rem;
  margin-bottom: 0.25rem;
}

.about-intro .role {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
}

@media (max-width: 640px) {
  .about-header {
    flex-direction: column;
    text-align: center;
  }
}

/* ---- Certifications ---- */

.cert-list {
  list-style: none;
  padding: 0 !important;
  margin: 0;
}

.cert-list li {
  padding: 0.4rem 0;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.cert-date {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  white-space: nowrap;
}

/* ---- Research Page ---- */

.publication {
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-border);
}

.publication:last-child {
  border-bottom: none;
}

.publication .authors {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.25rem;
}

.publication .pub-title {
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.publication .venue {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  font-style: italic;
}

/* ---- Footer ---- */

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

.site-footer .wrapper {
  max-width: var(--max-width-wide);
  margin: 0 auto;
}

.footer-links {
  display: flex;
  gap: 1.25rem;
  justify-content: center;
  margin-bottom: 0.75rem;
}

.footer-links a {
  color: var(--color-text-secondary);
}

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

.footer-links svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

/* ---- Table of Contents Override ---- */

div#table-of-content {
  margin: 2em 0 !important;
  padding: 1.25em;
  color: var(--color-text);
  font-size: 0.85em !important;
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  box-shadow: none;
}

#markdown-toc {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem 1.25rem 1.25rem 2.5rem;
  margin-bottom: 2rem;
  font-size: 0.9rem;
  line-height: 1.8;
}

#markdown-toc li {
  margin-bottom: 0.15rem;
}

#markdown-toc a {
  color: var(--color-text);
}

#markdown-toc a:hover {
  color: var(--color-accent);
}

/* ---- Responsive ---- */

@media (max-width: 640px) {
  .hero h1 {
    font-size: 1.75rem;
  }

  .hero .subtitle {
    font-size: 1rem;
  }

  .page-content {
    padding: 2rem 1.25rem 3rem;
  }

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

  .page-content h1 {
    font-size: 1.5rem;
  }

  .page-content h2 {
    font-size: 1.2rem;
  }
}

/* ---- Print ---- */

@media print {
  .site-header, .site-footer, .hero-links {
    display: none;
  }

  .page-content {
    max-width: none;
    padding: 0;
  }
}
.highlight table td { padding: 5px; }
.highlight table pre { margin: 0; }
.highlight .gh {
  color: #999999;
}
.highlight .sr {
  color: #f6aa11;
}
.highlight .go {
  color: #888888;
}
.highlight .gp {
  color: #555555;
}
.highlight .gs {
}
.highlight .gu {
  color: #aaaaaa;
}
.highlight .nb {
  color: #f6aa11;
}
.highlight .cm {
  color: #75715e;
}
.highlight .cp {
  color: #75715e;
}
.highlight .c1 {
  color: #75715e;
}
.highlight .cs {
  color: #75715e;
}
.highlight .c, .highlight .ch, .highlight .cd, .highlight .cpf {
  color: #75715e;
}
.highlight .err {
  color: #960050;
}
.highlight .gr {
  color: #960050;
}
.highlight .gt {
  color: #960050;
}
.highlight .gd {
  color: #49483e;
}
.highlight .gi {
  color: #49483e;
}
.highlight .ge {
  color: #49483e;
}
.highlight .kc {
  color: #66d9ef;
}
.highlight .kd {
  color: #66d9ef;
}
.highlight .kr {
  color: #66d9ef;
}
.highlight .no {
  color: #66d9ef;
}
.highlight .kt {
  color: #66d9ef;
}
.highlight .mf {
  color: #ae81ff;
}
.highlight .mh {
  color: #ae81ff;
}
.highlight .il {
  color: #ae81ff;
}
.highlight .mi {
  color: #ae81ff;
}
.highlight .mo {
  color: #ae81ff;
}
.highlight .m, .highlight .mb, .highlight .mx {
  color: #ae81ff;
}
.highlight .sc {
  color: #ae81ff;
}
.highlight .se {
  color: #ae81ff;
}
.highlight .ss {
  color: #ae81ff;
}
.highlight .sd {
  color: #e6db74;
}
.highlight .s2 {
  color: #e6db74;
}
.highlight .sb {
  color: #e6db74;
}
.highlight .sh {
  color: #e6db74;
}
.highlight .si {
  color: #e6db74;
}
.highlight .sx {
  color: #e6db74;
}
.highlight .s1 {
  color: #e6db74;
}
.highlight .s, .highlight .sa, .highlight .dl {
  color: #e6db74;
}
.highlight .na {
  color: #a6e22e;
}
.highlight .nc {
  color: #a6e22e;
}
.highlight .nd {
  color: #a6e22e;
}
.highlight .ne {
  color: #a6e22e;
}
.highlight .nf, .highlight .fm {
  color: #a6e22e;
}
.highlight .vc {
  color: #ffffff;
  background-color: #272822;
}
.highlight .nn {
  color: #ffffff;
  background-color: #272822;
}
.highlight .nl {
  color: #ffffff;
  background-color: #272822;
}
.highlight .ni {
  color: #ffffff;
  background-color: #272822;
}
.highlight .bp {
  color: #ffffff;
  background-color: #272822;
}
.highlight .vg {
  color: #ffffff;
  background-color: #272822;
}
.highlight .vi {
  color: #ffffff;
  background-color: #272822;
}
.highlight .nv, .highlight .vm {
  color: #ffffff;
  background-color: #272822;
}
.highlight .w {
  color: #ffffff;
  background-color: #272822;
}
.highlight {
  color: #ffffff;
  background-color: #272822;
}
.highlight .n, .highlight .py, .highlight .nx {
  color: #ffffff;
  background-color: #272822;
}
.highlight .ow {
  color: #f92672;
}
.highlight .nt {
  color: #f92672;
}
.highlight .k, .highlight .kv {
  color: #f92672;
}
.highlight .kn {
  color: #f92672;
}
.highlight .kp {
  color: #f92672;
}
.highlight .o {
  color: #f92672;
}