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

:root {
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-accent: #7c3aed;
  --color-bg: #ffffff;
  --color-surface: #f8fafc;
  --color-text: #1e293b;
  --color-text-secondary: #64748b;
  --color-text-muted: #94a3b8;
  --color-border: #e2e8f0;
  --color-code-bg: #0f172a;
  --color-nav-bg: rgba(255, 255, 255, 0.9);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --radius: 12px;
  --radius-sm: 8px;
  --max-width: 800px;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', Monaco, Consolas, monospace;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.15s ease;
}

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

img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
}

/* Nav */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-nav-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.logo:hover {
  color: var(--color-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color 0.15s ease;
}

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

.social-links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.social-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  color: var(--color-text-muted);
  font-size: 16px;
  transition: color 0.15s ease, background 0.15s ease;
}

.social-links a:hover {
  color: var(--color-text);
  background: var(--color-surface);
}

/* Wrapper */
.wrapper {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 24px 64px;
}

/* About / Hero section on homepage */
.hero {
  position: relative;
  text-align: center;
  padding: 48px 0 64px;
  min-height: 520px;
}

#hero-canvas {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100vw;
  height: 100%;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-avatar {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 24px;
  border: 3px solid var(--color-border);
  transition: border-color 0.2s ease;
}

.hero-avatar:hover {
  border-color: var(--color-primary);
}

.hero h1 {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin: 0 0 8px;
  line-height: 1.2;
}

.hero-subtitle {
  font-size: 18px;
  color: var(--color-text-secondary);
  margin: 0 0 24px;
}

.hero-links {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-links a {
  font-size: 14px;
  font-weight: 500;
  padding: 6px 16px;
  border-radius: 20px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  transition: all 0.15s ease;
}

.hero-links a:hover {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

.hero-download {
  text-align: right;
  margin-bottom: 8px;
}

.hero-download a {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-primary);
  transition: all 0.15s ease;
  display: inline-block;
}

.hero-download a:hover {
  background: var(--color-primary);
  color: white;
}

/* Sections on CV */
.cv-section {
  margin-top: 48px;
}

.cv-section h3 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 20px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-border);
  position: relative;
}

.cv-section h3::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 48px;
  height: 2px;
  background: var(--color-primary);
}

.cv-item {
  padding: 12px 0;
}

.cv-item-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 4px;
}

.cv-item-title {
  font-weight: 600;
  font-size: 16px;
}

.cv-item-date {
  font-size: 14px;
  color: var(--color-text-muted);
  white-space: nowrap;
  font-weight: 400;
}

.cv-item-sub {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-top: 2px;
}

hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 0;
}

/* Publications */
.pub-item {
  padding: 16px 0;
  line-height: 1.6;
}

.pub-item strong {
  font-weight: 600;
}

.pub-venue {
  font-weight: 600;
  color: var(--color-text);
}

.pub-title {
  font-style: italic;
}

.pub-links {
  display: inline-flex;
  gap: 8px;
  margin-left: 4px;
}

.pub-links a {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-primary);
}

.pub-links a:hover {
  text-decoration: underline;
}

/* Blog list */
.page-header {
  text-align: center;
  padding: 16px 0 40px;
}

.page-header h1 {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin: 0 0 8px;
}

.page-header .subtitle {
  font-size: 16px;
  color: var(--color-text-secondary);
  margin: 0;
}

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

.blog-card {
  display: block;
  padding: 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: 16px;
  transition: all 0.2s ease;
  background: var(--color-bg);
}

.blog-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.blog-card-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin: 0 0 8px;
  line-height: 1.4;
}

.blog-card:hover .blog-card-title {
  color: var(--color-primary);
}

.blog-card-meta {
  font-size: 14px;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.blog-card-desc {
  font-size: 15px;
  color: var(--color-text-secondary);
  margin-top: 8px;
  line-height: 1.5;
}

/* Blog post */
.post-header {
  margin-bottom: 32px;
}

.post-header h1 {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.3;
  margin: 0 0 12px;
}

.post-meta {
  font-size: 14px;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.post-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.post-tag {
  display: inline-flex;
  font-size: 12px;
  font-weight: 500;
  padding: 2px 10px;
  border-radius: 12px;
  background: var(--color-surface);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  transition: all 0.15s ease;
}

.post-tag:hover {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

/* Post content typography */
.post-content {
  line-height: 1.8;
  font-size: 16px;
}

.post-content h2 {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 40px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.post-content h3 {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 32px 0 12px;
}

.post-content h4 {
  font-size: 18px;
  font-weight: 600;
  margin: 24px 0 8px;
}

.post-content p {
  margin: 0 0 16px;
}

.post-content ul, .post-content ol {
  margin: 0 0 16px;
  padding-left: 24px;
}

.post-content li {
  margin-bottom: 4px;
}

.post-content blockquote {
  margin: 24px 0;
  padding: 16px 20px;
  border-left: 4px solid var(--color-primary);
  background: var(--color-surface);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--color-text-secondary);
}

.post-content blockquote p {
  margin: 0;
}

.post-content img {
  margin: 24px auto;
  display: block;
}

.post-content hr {
  margin: 32px 0;
}

.post-content code {
  font-family: var(--font-mono);
  font-size: 14px;
  background: var(--color-surface);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--color-border);
}

.post-content pre {
  margin: 24px 0;
  border-radius: var(--radius);
  overflow-x: auto;
  background: var(--color-code-bg) !important;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.post-content pre code {
  background: none;
  border: none;
  padding: 0;
  color: inherit;
}

.post-content pre .highlight,
.post-content pre code {
  background: transparent !important;
}

/* Post navigation */
.post-nav {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.post-nav a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
  max-width: 45%;
}

.post-nav a:hover {
  color: var(--color-primary);
}

.post-nav .next {
  text-align: right;
  margin-left: auto;
}

/* Footer */
.footer {
  text-align: center;
  padding: 32px 24px;
  border-top: 1px solid var(--color-border);
  font-size: 13px;
  color: var(--color-text-muted);
}

.footer a {
  color: var(--color-text-secondary);
  font-weight: 400;
}

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

.footer-badge {
  display: inline-block;
  margin-bottom: 16px;
  line-height: 0;
}

.footer-badge img {
  max-width: 250px;
  width: 100%;
  height: auto;
}

/* Comments section */
#disqus_thread {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

/* 404 */
.error-page {
  text-align: center;
  padding: 80px 24px;
}

.error-code {
  font-size: 96px;
  font-weight: 800;
  letter-spacing: -0.05em;
  line-height: 1;
  margin: 0;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.error-message {
  font-size: 20px;
  color: var(--color-text-secondary);
  margin: 16px 0 32px;
}

.error-link {
  display: inline-block;
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  background: var(--color-primary);
  color: white !important;
  font-weight: 600;
  transition: background 0.15s ease;
}

.error-link:hover {
  background: var(--color-primary-hover);
}

/* Glitch - keep minimal */
.glitch {
  animation: glitch 3s steps(100) infinite;
}

@keyframes glitch {
  0%, 90%, 100% { opacity: 1; }
  92% { opacity: 0.8; transform: translate(-2px, 0); }
  94% { opacity: 0.9; transform: translate(2px, 0); }
  96% { opacity: 0.95; transform: translate(-1px, 0); }
  98% { transform: translate(1px, 0); }
}

/* YouTube embed */
.embed-responsive {
  position: relative;
  width: 100%;
  max-width: 560px;
  margin: 24px auto;
}

.embed-responsive::before {
  content: '';
  display: block;
  padding-top: 56.25%;
}

.embed-responsive iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: var(--radius-sm);
}

/* Hide duplicate avatar (now in template hero) */
#about-img {
  display: none;
}

/* CV content styling */
#describe-text {
  max-width: 600px;
  margin: 0 auto 32px;
  text-align: center;
}

#describe-text p {
  margin: 0 0 8px;
  line-height: 1.6;
}

/* About devider (legacy) */
.about__devider {
  display: none;
}

.about__text {
  font-size: 14px;
  color: var(--color-text-muted);
}

/* Legacy right-floated spans in CV for dates */
.page-content span[style*="float: right"] {
  font-size: 14px;
  color: var(--color-text-muted);
  font-weight: 400;
}

/* Publication entries */
.page-content strong:first-child {
  font-weight: 600;
  color: var(--color-text);
}

.page-content em {
  font-style: italic;
}

/* CV items between <hr> separators */
.page-content hr {
  margin: 0;
  border: none;
  border-top: 1px solid var(--color-border);
}

/* Content paragraphs after heading */
.page-content h3 + p,
.page-content h3 + p + p {
  margin-top: 4px;
}

/* CV section heading fix for triple-hash headings */
.cv-section-heading {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 20px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-border);
  position: relative;
}

.cv-section-heading::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 48px;
  height: 2px;
  background: var(--color-primary);
}

/* Render h3 in main content as section headings */
.post-content h3,
.page-content h3 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 32px 0 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-border);
  position: relative;
}

.post-content h3::after,
.page-content h3::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 48px;
  height: 2px;
  background: var(--color-primary);
}

.page-content h4 {
  font-size: 17px;
  font-weight: 600;
  margin: 24px 0 8px;
}

.page-content p {
  margin: 0 0 12px;
  line-height: 1.7;
}

/* Responsive */
@media (max-width: 640px) {
  .wrapper {
    padding: 24px 16px 48px;
  }

  .nav-inner {
    padding: 0 16px;
  }

  .hero h1 {
    font-size: 26px;
  }

  .hero-avatar {
    width: 100px;
    height: 100px;
  }

  .post-header h1 {
    font-size: 24px;
  }

  .blog-card {
    padding: 16px;
  }

  .cv-item-header {
    flex-direction: column;
    gap: 2px;
  }

  .cv-item-date {
    white-space: normal;
  }

  .error-code {
    font-size: 64px;
  }

  .social-links {
    gap: 4px;
  }

  .social-links a {
    width: 32px;
    height: 32px;
    font-size: 14px;
  }
}