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

/* Keyframes */
@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.85);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

/* Global polish */
html {
  scroll-behavior: smooth;
}

::selection {
  background: var(--selection-bg);
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--gradient-mid);
  outline-offset: 2px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

h1, h2, h3 {
  color: var(--text);
  line-height: 1.3;
  margin-bottom: 0.5em;
  font-weight: 600;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.35rem; }
h3 { font-size: 1.1rem; }

p, ul, ol {
  margin-bottom: 1em;
}

ul, ol {
  padding-left: 1.25em;
}

/* Layout */
.container {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

main.container {
  padding-top: 3rem;
  padding-bottom: 5rem;
  min-height: calc(100vh - 160px);
}

/* Nav */
.site-nav {
  background: var(--dark-bg);
  padding: 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.site-title {
  color: var(--text-bright);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.site-title:hover {
  text-decoration: none;
  color: var(--text-soft);
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 0.25rem;
  padding: 0;
  margin: 0;
}

.nav-links li {
  margin: 0;
}

.nav-links a {
  color: var(--text-light);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.4rem 0.75rem;
  border-radius: 6px;
  transition: color var(--transition), background var(--transition);
  display: block;
}

.nav-links a:hover {
  color: var(--text-bright);
  background: var(--dark-overlay-light);
  text-decoration: none;
}

.nav-links a.active {
  color: var(--text-bright);
  background: var(--dark-overlay-medium);
}

/* Footer */
.site-footer {
  background: var(--dark-bg);
  border-top: 1px solid var(--border);
  padding: 2.5rem 0 1.5rem;
  color: var(--text-light);
  font-size: 0.85rem;
}

.site-footer a {
  color: var(--text-soft);
  font-weight: 500;
  transition: color var(--transition);
}

.site-footer a:hover {
  color: var(--accent);
  text-decoration: none;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.footer-name {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
}

.footer-tagline {
  font-size: 0.8rem;
  color: var(--text-light);
}

.footer-nav {
  display: flex;
  gap: 3rem;
}

.footer-nav-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.footer-nav-label {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-light);
  margin-bottom: 0.15rem;
}

.footer-nav-group a {
  font-size: 0.85rem;
}

.footer-bottom {
  padding-top: 1rem;
}

.footer-copy {
  margin: 0;
  color: var(--text-light);
  font-size: 0.78rem;
}

/* Skip to content */
.skip-to-content {
  position: absolute;
  top: -100%;
  left: 1rem;
  padding: 0.5rem 1rem;
  background: var(--accent);
  color: var(--text-bright);
  border-radius: 0 0 var(--radius) var(--radius);
  font-size: 0.85rem;
  font-weight: 600;
  z-index: 200;
  transition: top 0.2s ease;
}

.skip-to-content:focus {
  top: 0;
  text-decoration: none;
  color: var(--text-bright);
}

/* Homepage hero banner */
.hero-banner {
  background: var(--hero-bg-deep);
  color: var(--text-bright);
  padding: 6rem 0 5rem;
  position: relative;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}

.hero-glow--1 {
  width: 400px;
  height: 400px;
  top: -100px;
  right: -50px;
  background: radial-gradient(circle, var(--hero-glow-primary), transparent 70%);
  animation: float 8s ease-in-out infinite;
}

.hero-glow--2 {
  width: 300px;
  height: 300px;
  bottom: -80px;
  left: -30px;
  background: radial-gradient(circle, var(--hero-glow-secondary), transparent 70%);
  animation: float 10s ease-in-out infinite 1s;
}

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

.hero-banner .hero-label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--hero-label-color);
  margin-bottom: 0.75rem;
  animation: fadeInUp 0.5s ease both;
}

.hero-banner h1 {
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--text-bright);
  margin-bottom: 0.5em;
  animation: fadeInUp 0.5s ease 0.1s both;
}

.hero-name {
  color: var(--hero-name-color);
}

.hero-banner .hero-tagline {
  font-size: 1.15rem;
  color: var(--text-light);
  line-height: 1.75;
  max-width: 600px;
  margin-bottom: 1.5rem;
  animation: fadeInUp 0.5s ease 0.2s both;
}

.hero-banner .hero-tagline strong {
  color: var(--text-bright);
  font-weight: 600;
}

.hero-links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0;
  margin: 0;
  animation: fadeInUp 0.5s ease 0.3s both;
}

.hero-links li {
  margin: 0;
}

.hero-links a {
  display: inline-block;
  color: var(--text-light);
  font-size: 0.88rem;
  font-weight: 500;
  padding: 0.4rem 1rem;
  border: 1px solid var(--dark-border);
  border-radius: 6px;
  transition: all var(--transition);
}

.hero-links a:hover {
  color: var(--text-bright);
  border-color: var(--accent);
  background: var(--accent-tint);
  box-shadow: var(--accent-glow-md);
  transform: translateY(-1px);
  text-decoration: none;
}

.hero-link--primary {
  border-color: var(--hero-primary-link-border) !important;
  color: var(--text) !important;
}

/* Stats bar */
.home-stats {
  background: var(--bg);
  padding: 1.75rem 0 2.5rem;
  position: relative;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  text-align: center;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  background: var(--dark-overlay-faint);
  border: 1px solid var(--dark-overlay-subtle);
  border-radius: var(--radius);
  padding: 1rem 0.75rem;
  transition: background var(--transition);
  animation: scaleIn 0.5s ease both;
}

.stat:nth-child(1) { animation-delay: 0.4s; }
.stat:nth-child(2) { animation-delay: 0.5s; }
.stat:nth-child(3) { animation-delay: 0.6s; }
.stat:nth-child(4) { animation-delay: 0.7s; }

.stat:hover {
  background: var(--dark-overlay-subtle);
}

.stat-number {
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--hero-stat-color);
}

.stat-label {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Home sections */
.home-section {
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--border);
}

.home-section:last-child {
  border-bottom: none;
}

.home-section > h2 {
  font-size: 1.25rem;
  margin-bottom: 1.5rem;
  position: relative;
  display: inline-block;
}

.home-section > h2::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 60px;
  height: 3px;
  background: var(--gradient-accent-horizontal);
  border-radius: 2px;
}

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.section-header h2 {
  font-size: 1.25rem;
  margin-bottom: 0;
  position: relative;
  display: inline-block;
}

.section-header h2::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 60px;
  height: 3px;
  background: var(--gradient-accent-horizontal);
  border-radius: 2px;
}

.section-link {
  font-size: 0.88rem;
  font-weight: 500;
}

/* Tools/tech grid */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.tool-group h3 {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-light);
  margin-bottom: 0.6rem;
}

.tool-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 0;
}

.tool-list li {
  background: var(--bg-muted);
  border-radius: 4px;
  padding: 0.25em 0.65em;
  font-size: 0.82rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin: 0;
}

/* Tools section */
.home-section--tools {
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--border);
}

.home-section--tools .tool-group {
  animation: fadeInUp 0.5s ease both;
}

.home-section--tools .tool-group:nth-child(1) { animation-delay: 0.1s; }
.home-section--tools .tool-group:nth-child(2) { animation-delay: 0.15s; }
.home-section--tools .tool-group:nth-child(3) { animation-delay: 0.2s; }
.home-section--tools .tool-group:nth-child(4) { animation-delay: 0.25s; }
.home-section--tools .tool-group:nth-child(5) { animation-delay: 0.3s; }
.home-section--tools .tool-group:nth-child(6) { animation-delay: 0.35s; }

/* Legacy section support (non-homepage) */
.section {
  margin-top: 2.5rem;
}

.section h2 {
  font-size: 1.25rem;
  margin-bottom: 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--accent);
  display: inline-block;
}

.section .view-all {
  margin-top: 1.25rem;
  font-weight: 500;
}

/* Project cards */
.category-group {
  margin-bottom: 2.5rem;
  animation: fadeInUp 0.5s ease both;
}

.category-group h2 {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: none;
  display: inline-block;
  position: relative;
}

.category-group h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 3px;
  background: var(--gradient-accent-horizontal);
  border-radius: 2px;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.project-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  transition: box-shadow var(--transition-slow), border-color var(--transition), transform var(--transition-slow);
  background: var(--bg);
  position: relative;
  overflow: hidden;
  animation: fadeInUp 0.5s ease both;
}

.project-card:nth-child(1) { animation-delay: 0.1s; }
.project-card:nth-child(2) { animation-delay: 0.2s; }
.project-card:nth-child(3) { animation-delay: 0.3s; }
.project-card:nth-child(4) { animation-delay: 0.4s; }

.project-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-slow);
}

.project-card:hover::before {
  transform: scaleX(1);
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* Category-colored accent bars */
.project-card[data-category="streaming-real-time"]::before { background: var(--cat-streaming); }
.project-card[data-category="streaming-real-time"]:hover { box-shadow: var(--shadow-lg), var(--cat-streaming-glow); }
.project-card[data-category="batch-orchestration"]::before { background: var(--cat-batch); }
.project-card[data-category="batch-orchestration"]:hover { box-shadow: var(--shadow-lg), var(--cat-batch-glow); }
.project-card[data-category="lakehouse"]::before { background: var(--cat-lakehouse); }
.project-card[data-category="lakehouse"]:hover { box-shadow: var(--shadow-lg), var(--cat-lakehouse-glow); }
.project-card[data-category="data-quality"]::before { background: var(--cat-quality); }
.project-card[data-category="data-quality"]:hover { box-shadow: var(--shadow-lg), var(--cat-quality-glow); }
.project-card[data-category="devops-infrastructure"]::before { background: var(--cat-devops); }
.project-card[data-category="devops-infrastructure"]:hover { box-shadow: var(--shadow-lg), var(--cat-devops-glow); }

.project-card {
  cursor: pointer;
}

.project-card h3 {
  font-size: 1.05rem;
  margin-bottom: 0.4em;
}

.project-card h3 a {
  color: var(--text);
}

.project-card h3 a::after {
  content: "";
  position: absolute;
  inset: 0;
}

.project-card h3 a:hover {
  color: var(--accent);
  text-decoration: none;
}

.project-card p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.6;
  margin-bottom: 0.75em;
}

/* Category label color coding */
.project-card-category {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-light);
  margin-bottom: 0.4em;
}

.project-card[data-category="streaming-real-time"] .project-card-category { color: var(--cat-streaming); }
.project-card[data-category="batch-orchestration"] .project-card-category { color: var(--cat-batch); }
.project-card[data-category="lakehouse"] .project-card-category { color: var(--cat-lakehouse); }
.project-card[data-category="data-quality"] .project-card-category { color: var(--cat-quality); }
.project-card[data-category="devops-infrastructure"] .project-card-category { color: var(--cat-devops); }

/* Tech stack tags */
.tech-stack {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  padding: 0;
  margin: 0;
}

.tech-stack li {
  background: var(--bg-muted);
  border-radius: 4px;
  padding: 0.2em 0.55em;
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin: 0;
  transition: background var(--transition), color var(--transition);
}

.project-card:hover .tech-stack li {
  background: var(--accent-tint);
  color: var(--accent);
}

/* Filter bar */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.75rem;
  padding: 0;
}

.filter-tag {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 500;
  padding: 0.35em 0.8em;
  border-radius: 20px;
  cursor: pointer;
  transition: all var(--transition);
}

.filter-tag:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.filter-tag.active {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-mid));
  border-color: transparent;
  color: var(--text-bright);
}

/* Mermaid diagrams */
.mermaid {
  text-align: center;
  margin: 1.5em 0;
  overflow-x: auto;
}

.mermaid svg {
  max-width: 100%;
  height: auto;
}

/* Project detail page */
.project-detail h1 {
  margin-bottom: 0.3em;
}

.project-detail .project-meta {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

.project-detail .project-category {
  color: var(--text-light);
  font-weight: 500;
}

.project-detail .project-link {
  color: var(--accent);
  font-weight: 600;
}

.project-detail .tech-stack {
  margin-bottom: 2rem;
  padding-top: 0.25rem;
}

.project-detail h2 {
  margin-top: 2.25rem;
}

.project-detail p {
  color: var(--text-secondary);
  line-height: 1.75;
}

.project-detail strong {
  color: var(--text);
}

.project-detail code {
  background: var(--bg-muted);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  font-size: 0.88em;
}

.project-detail ul {
  color: var(--text-secondary);
}

/* Blog list (compact, used on homepage) */
.post-list {
  list-style: none;
  padding: 0;
}

.post-list li {
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: baseline;
  gap: 1.25rem;
}

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

.post-list time {
  color: var(--text-light);
  font-size: 0.85rem;
  flex-shrink: 0;
  min-width: 6.5em;
  font-variant-numeric: tabular-nums;
}

.post-list a {
  font-weight: 500;
}

/* Writing cards (homepage) */
.writing-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.writing-card {
  display: block;
  position: relative;
  padding: 1.25rem 2.5rem 1.25rem 1.5rem;
  border: 1px solid var(--border);
  border-bottom: none;
  color: inherit;
  transition: background var(--transition-slow), box-shadow var(--transition-slow), transform var(--transition);
  overflow: hidden;
  animation: fadeInUp 0.5s ease both;
}

.writing-card:first-child {
  border-radius: var(--radius) var(--radius) 0 0;
}

.writing-card:last-child {
  border-bottom: 1px solid var(--border);
  border-radius: 0 0 var(--radius) var(--radius);
}

.writing-card:only-child {
  border-bottom: 1px solid var(--border);
  border-radius: var(--radius);
}

.writing-card:nth-child(1) { animation-delay: 0.1s; }
.writing-card:nth-child(2) { animation-delay: 0.2s; }
.writing-card:nth-child(3) { animation-delay: 0.3s; }

.writing-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 3px;
  background: var(--gradient-accent);
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform var(--transition-slow);
}

.writing-card:hover::before {
  transform: scaleY(1);
}

.writing-card:hover {
  background: var(--bg-subtle);
  box-shadow: var(--shadow-md);
  transform: translateX(4px);
  text-decoration: none;
}

.writing-card time {
  display: block;
  color: var(--text-light);
  font-size: 0.8rem;
  font-variant-numeric: tabular-nums;
  margin-bottom: 0.25rem;
}

.writing-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.25em;
  color: var(--text);
  transition: color var(--transition);
}

.writing-card:hover h3 {
  color: var(--accent);
}

.writing-card p {
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.6;
  margin-bottom: 0;
}

.writing-card-arrow {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%) translateX(-8px);
  opacity: 0;
  color: var(--accent);
  font-size: 1.1rem;
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.writing-card:hover .writing-card-arrow {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
}

/* Blog page header */
.blog-header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.75rem;
  border-bottom: 1px solid var(--border);
}

.blog-header h1 {
  font-size: 2rem;
  margin-bottom: 0.3em;
}

.blog-header p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
  max-width: 560px;
  margin-bottom: 0;
}

/* Blog card listing */
.blog-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 1rem;
  transition: border-color var(--transition-slow), box-shadow var(--transition-slow), transform var(--transition-slow);
  position: relative;
  overflow: hidden;
  animation: fadeInUp 0.5s ease both;
}

.blog-card:nth-child(1) { animation-delay: 0.1s; }
.blog-card:nth-child(2) { animation-delay: 0.2s; }
.blog-card:nth-child(3) { animation-delay: 0.3s; }
.blog-card:nth-child(4) { animation-delay: 0.4s; }
.blog-card:nth-child(5) { animation-delay: 0.5s; }

.blog-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 3px;
  background: var(--gradient-accent);
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform var(--transition-slow);
}

.blog-card:hover::before {
  transform: scaleY(1);
}

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

.blog-card-link {
  display: block;
  padding: 1.75rem 2rem;
  color: inherit;
  position: relative;
}

.blog-card-link:hover {
  text-decoration: none;
}

.blog-card-arrow {
  position: absolute;
  right: 1.5rem;
  top: 50%;
  transform: translateY(-50%) translateX(-8px);
  opacity: 0;
  color: var(--accent);
  font-size: 1.1rem;
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.blog-card:hover .blog-card-arrow {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
}

.blog-card-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-light);
  margin-bottom: 0.6rem;
  font-variant-numeric: tabular-nums;
}

.blog-card-dot {
  color: var(--border);
}

.blog-card-link h2 {
  font-size: 1.35rem;
  margin-bottom: 0.4em;
  letter-spacing: -0.01em;
  transition: color var(--transition);
}

.blog-card-link:hover h2 {
  color: var(--accent);
}

.blog-card-link p {
  color: var(--text-secondary);
  font-size: 0.93rem;
  line-height: 1.7;
  margin-bottom: 0;
}

.blog-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 1rem;
}

.blog-tag {
  background: var(--bg-muted);
  border-radius: 4px;
  padding: 0.2em 0.6em;
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 500;
  transition: background var(--transition), color var(--transition);
}

.blog-card:hover .blog-tag {
  background: var(--accent-tint);
  color: var(--accent);
}

.blog-empty {
  color: var(--text-light);
  padding: 4rem 0;
  text-align: center;
  font-size: 1.05rem;
}

/* Page hero */
.page-hero {
  background: var(--hero-bg-deep);
  color: var(--text-bright);
  padding: 3.5rem 0 3rem;
  position: relative;
  overflow: hidden;
}

.page-hero::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-accent-horizontal);
  background-size: 200% 100%;
  animation: shimmer 3s linear infinite;
}

.page-hero h1 {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--text-bright);
  letter-spacing: -0.03em;
  margin-bottom: 0.3em;
  animation: fadeInUp 0.5s ease both;
}

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

.page-hero-label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--hero-label-color);
  margin-bottom: 0.75rem;
  animation: fadeInUp 0.5s ease both;
}

.page-hero-subtitle {
  color: var(--text-light);
  font-size: 1.05rem;
  line-height: 1.7;
  max-width: 600px;
  margin-bottom: 0;
  animation: fadeInUp 0.5s ease 0.1s both;
}

main.container.has-page-hero {
  padding-top: 2.5rem;
}

/* Blog post page */
.post-header {
  margin-bottom: 3rem;
}

.post-back {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-light);
  margin-bottom: 1.5rem;
  transition: color var(--transition);
}

.post-back:hover {
  color: var(--accent);
  text-decoration: none;
}

.post-header h1 {
  font-size: 2.2rem;
  letter-spacing: -0.02em;
  margin-bottom: 0.4em;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-light);
  font-size: 0.88rem;
  font-weight: 500;
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.75rem;
}

.post-body {
  border-top: 1px solid var(--border);
  padding-top: 2.5rem;
}

.post-body > p:first-child {
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

.post h2 {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.post p {
  color: var(--text-secondary);
  line-height: 1.8;
}

.post code {
  background: var(--bg-muted);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  font-size: 0.88em;
}

.post pre {
  background: var(--dark-bg);
  border: none;
  border-radius: var(--radius);
  padding: 1.5rem;
  overflow-x: auto;
  margin: 1.5em 0;
  font-size: 0.85rem;
  line-height: 1.65;
}

.post pre code {
  background: none;
  padding: 0;
  color: var(--text-soft);
}

.post ul, .post ol {
  color: var(--text-secondary);
  line-height: 1.8;
}

.post li {
  margin-bottom: 0.35em;
}

.post strong {
  color: var(--text);
}

.post blockquote {
  border-left: 3px solid var(--accent);
  padding: 0.25rem 0 0.25rem 1.25rem;
  margin: 1.5em 0;
  color: var(--text-secondary);
  font-style: italic;
}

/* About page */

/* Profile: photo + bio side by side */
.about-profile {
  display: flex;
  align-items: flex-start;
  gap: 2rem;
  margin-bottom: 2rem;
  animation: fadeInUp 0.5s ease 0.05s both;
}

.about-photo {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  border: 3px solid var(--border);
  box-shadow: var(--shadow-md);
  transition: border-color var(--transition-slow), box-shadow var(--transition-slow);
}

.about-photo:hover {
  border-color: var(--gradient-mid);
  box-shadow: var(--shadow-glow);
}

.about-profile-body p {
  color: var(--text-secondary);
  line-height: 1.8;
}

/* Facts row: horizontal chips */
.about-facts-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  margin-bottom: 2.5rem;
  animation: fadeInUp 0.5s ease 0.15s both;
}

.about-fact-chip {
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  position: relative;
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.about-fact-chip::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-accent-horizontal);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-slow);
}

.about-fact-chip:hover::before {
  transform: scaleX(1);
}

.about-fact-chip:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-sm);
}

.about-fact-label {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-light);
}

.about-fact-value {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text);
}

.about-fact-value a {
  color: var(--text-secondary);
  font-weight: 500;
}

.about-fact-value a:hover {
  color: var(--accent);
}

/* About sections */
.about-section {
  margin-bottom: 2.5rem;
  animation: fadeInUp 0.5s ease both;
}

.about-section:nth-child(3) { animation-delay: 0.2s; }
.about-section:nth-child(4) { animation-delay: 0.25s; }
.about-section:nth-child(5) { animation-delay: 0.3s; }

.about-section h2 {
  font-size: 1.15rem;
  margin-bottom: 0.75em;
  position: relative;
  display: inline-block;
}

.about-section h2::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 60px;
  height: 3px;
  background: var(--gradient-accent-horizontal);
  border-radius: 2px;
}

.about-section p {
  color: var(--text-secondary);
  line-height: 1.8;
}

/* Values 2x2 grid */
.about-values-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.value-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  transition: background var(--transition-slow), box-shadow var(--transition-slow), transform var(--transition-slow);
  position: relative;
  overflow: hidden;
}

.value-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent-horizontal);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-slow);
}

.value-card:hover::before {
  transform: scaleX(1);
}

.value-card:hover {
  background: var(--bg-subtle);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.value-card strong {
  display: block;
  font-size: 0.95rem;
  margin-bottom: 0.35em;
}

.value-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: 0;
}

/* Interests grid — 3 cols, last card spans 2 for balance */
.about-interests-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.interest-card {
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 1.15rem 1.35rem;
  background: var(--bg);
  transition: background var(--transition-slow), box-shadow var(--transition-slow), transform var(--transition-slow);
}

.interest-card:hover {
  background: var(--bg-subtle);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.interest-card:nth-child(1) { border-left-color: var(--gradient-start); }
.interest-card:nth-child(2) { border-left-color: var(--gradient-mid); }
.interest-card:nth-child(3) { border-left-color: var(--gradient-end); }
.interest-card:nth-child(4) { border-left-color: var(--cat-quality); }
.interest-card:nth-child(5) { border-left-color: var(--cat-batch); }

.interest-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin-bottom: 0.5em;
}

.interest-card:nth-child(1) .interest-label { color: var(--gradient-start); }
.interest-card:nth-child(2) .interest-label { color: var(--gradient-mid); }
.interest-card:nth-child(3) .interest-label { color: var(--gradient-end); }
.interest-card:nth-child(4) .interest-label { color: var(--cat-quality); }
.interest-card:nth-child(5) .interest-label { color: var(--cat-batch); }

.interest-card p {
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.7;
  margin-bottom: 0;
}

/* Contact CTA */
.about-contact {
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 2rem;
  position: relative;
  overflow: hidden;
  animation: fadeInUp 0.5s ease 0.35s both;
}

.about-contact::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-accent-horizontal);
}

.about-contact h2 {
  font-size: 1.15rem;
  margin-bottom: 0.5em;
  position: relative;
  display: inline-block;
}

.about-contact h2::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 60px;
  height: 3px;
  background: var(--gradient-accent-horizontal);
  border-radius: 2px;
}

.about-contact p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 0;
}

.about-contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.contact-link {
  display: inline-block;
  padding: 0.45rem 1.1rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
}

.contact-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--bg-subtle);
  text-decoration: none;
  transform: translateY(-1px);
}

.contact-link--primary {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--contact-primary-bg);
}

/* CV page */
.cv-header {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.cv-header h1 {
  font-size: 2rem;
  margin-bottom: 0.3em;
}

.cv-contact {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin: 0;
  list-style: none;
  padding: 0;
}

.cv-contact a {
  color: var(--text-secondary);
  font-weight: 500;
}

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

.cv-section {
  margin-bottom: 2.25rem;
}

.cv-section h2 {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--accent);
}

.cv-section > p {
  color: var(--text-secondary);
  line-height: 1.75;
}

.cv-entry {
  margin-bottom: 1.75rem;
}

.cv-entry:last-child {
  margin-bottom: 0;
}

.cv-entry h3 {
  font-size: 1.05rem;
  margin-bottom: 0.1em;
}

.cv-entry .cv-meta {
  color: var(--text-light);
  font-size: 0.88rem;
  margin-bottom: 0.6em;
}

.cv-entry ul {
  padding-left: 1.2em;
  color: var(--text-secondary);
  line-height: 1.65;
}

.cv-entry ul li {
  margin-bottom: 0.25em;
}

.cv-skills {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem 2rem;
}

.cv-skills li {
  margin: 0;
  font-size: 0.93rem;
  color: var(--text-secondary);
}

.cv-skills strong {
  color: var(--text);
  display: block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-bottom: 0.15em;
}

/* 404 page */
.four-oh-four {
  text-align: center;
  padding: 4rem 0;
}

.four-oh-four h1 {
  font-size: 5rem;
  font-weight: 700;
  color: var(--text-bright);
  letter-spacing: -0.03em;
  margin-bottom: 0.15em;
  line-height: 1;
}

.four-oh-four p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 2rem;
}

.four-oh-four-links {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  padding: 0;
  margin: 0;
}

.four-oh-four-links a {
  display: inline-block;
  padding: 0.5rem 1.25rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--transition);
}

.four-oh-four-links a:hover {
  border-color: var(--accent);
  background: var(--bg-subtle);
  text-decoration: none;
}

/* CV download button */
.cv-header-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.3em;
}

.cv-download {
  display: inline-block;
  padding: 0.4rem 1rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
  transition: all var(--transition);
}

.cv-download:hover {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}

/* Post navigation (next/prev) */
.post-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.post-nav-link {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  max-width: 48%;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.post-nav-link:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
}

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

.post-nav-label {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-light);
}

.post-nav-title {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
  line-height: 1.4;
}

.post-nav-link:hover .post-nav-title {
  color: var(--accent);
}

/* Project detail dark code blocks */
.project-body pre {
  background: var(--dark-bg);
  border: none;
  border-radius: var(--radius);
  padding: 1.5rem;
  overflow-x: auto;
  margin: 1.5em 0;
  font-size: 0.85rem;
  line-height: 1.65;
}

.project-body pre code {
  background: none;
  padding: 0;
  color: var(--text-soft);
}

/* Page titles */
.page > h1:first-child {
  margin-bottom: 0.3em;
}

.page > h1 + p {
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

/* Responsive: tablet */
@media (max-width: 768px) {
  .project-grid {
    grid-template-columns: 1fr;
  }

  .cv-skills {
    grid-template-columns: 1fr;
  }

  main.container {
    padding-top: 2rem;
    padding-bottom: 3rem;
  }

  .hero-banner {
    padding: 4rem 0 3rem;
  }

  .hero-banner h1 {
    font-size: 2.6rem;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
  }

  .tools-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-facts-row {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-values-grid {
    grid-template-columns: 1fr;
  }

  .about-interests-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-hero h1 {
    font-size: 1.8rem;
  }
}

/* Responsive: mobile */
@media (max-width: 540px) {
  body {
    font-size: 15px;
  }

  .container {
    padding: 0 1rem;
  }

  /* Nav stacks on small screens */
  .site-nav .container {
    height: auto;
    flex-direction: column;
    padding-top: 0.75rem;
    padding-bottom: 0.75rem;
    gap: 0.5rem;
  }

  .nav-links {
    gap: 0.1rem;
  }

  .nav-links a {
    padding: 0.35rem 0.6rem;
    font-size: 0.85rem;
  }

  /* Hero */
  .hero-banner {
    padding: 3rem 0 2.5rem;
  }

  .hero-banner h1 {
    font-size: 2rem;
  }

  .hero-banner .hero-tagline {
    font-size: 1rem;
  }

  .hero-links a {
    font-size: 0.82rem;
    padding: 0.35rem 0.8rem;
  }

  .hero-glow {
    display: none;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }

  .stat-number {
    font-size: 1.25rem;
  }

  .tools-grid {
    grid-template-columns: 1fr 1fr;
  }

  .home-section {
    padding: 1.75rem 0;
  }

  /* Sections */
  .section {
    margin-top: 2rem;
  }

  /* Filter bar */
  .filter-bar {
    gap: 0.3rem;
  }

  .filter-tag {
    font-size: 0.75rem;
    padding: 0.3em 0.65em;
  }

  /* Cards */
  .project-card {
    padding: 1rem 1.15rem;
  }

  /* Writing cards */
  .writing-card {
    padding: 1rem 2rem 1rem 1rem;
  }

  /* Blog */
  .blog-card-link {
    padding: 1.25rem 1.15rem;
  }

  .blog-card-link h2 {
    font-size: 1.15rem;
  }

  .post-header h1 {
    font-size: 1.65rem;
  }

  .post h2 {
    padding-top: 1rem;
  }

  .post pre {
    padding: 1.15rem;
    margin-left: -1rem;
    margin-right: -1rem;
    border-radius: 0;
  }

  /* Blog list (homepage compact) */
  .post-list li {
    flex-direction: column;
    gap: 0.15rem;
  }

  .post-list time {
    min-width: auto;
  }

  /* CV */
  .cv-header h1 {
    font-size: 1.65rem;
  }

  .cv-contact {
    gap: 0.25rem 0.75rem;
    font-size: 0.85rem;
  }

  /* Project detail */
  .project-detail .project-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }

  .project-body pre {
    padding: 1.15rem;
    margin-left: -1rem;
    margin-right: -1rem;
    border-radius: 0;
  }

  /* Post navigation */
  .post-nav {
    flex-direction: column;
  }

  .post-nav-link {
    max-width: 100%;
  }

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

  /* CV download */
  .cv-header-top {
    flex-direction: column;
    gap: 0.5rem;
  }

  /* 404 */
  .four-oh-four h1 {
    font-size: 3.5rem;
  }

  .four-oh-four-links {
    flex-direction: column;
    align-items: center;
  }

  .about-profile {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1.25rem;
  }

  .about-photo {
    width: 110px;
    height: 110px;
  }

  .about-facts-row {
    grid-template-columns: 1fr;
  }

  .about-interests-grid {
    grid-template-columns: 1fr;
  }

  .about-contact-links {
    gap: 0.4rem;
  }

  .contact-link {
    font-size: 0.82rem;
    padding: 0.4rem 0.9rem;
  }

  .footer-top {
    flex-direction: column;
    gap: 1.5rem;
  }

  .footer-nav {
    gap: 2rem;
  }

  .page-hero {
    padding: 2.5rem 0 2rem;
  }

  .page-hero h1 {
    font-size: 1.65rem;
  }

  .page-hero-subtitle {
    font-size: 0.95rem;
  }

  h1 { font-size: 1.65rem; }
}