/* ===== Neobrutalist Design ===== */
:root {
  --bg: #f5f0e8;
  --bg-secondary: #ffffff;
  --text: #1a1a1a;
  --text-secondary: #444;
  --text-tertiary: #777;
  --accent: #ff5722;
  --accent-hover: #e64a19;
  --yellow: #ffe156;
  --blue: #4ecdc4;
  --pink: #ff6b9d;
  --purple: #c77dff;
  --green: #a8e06c;
  --border: #1a1a1a;
  --card-bg: #ffffff;
  --nav-bg: var(--yellow);
  --tag-bg: #e8e0d4;
  --tag-text: #1a1a1a;
  --code-bg: #1a1a1a;
  --code-text: #f5f0e8;
  --shadow: 4px 4px 0 #1a1a1a;
  --shadow-hover: 8px 8px 0 #1a1a1a;
}

[data-theme="dark"] {
  --bg: #1a1a2e;
  --bg-secondary: #16213e;
  --text: #eee;
  --text-secondary: #b8b8cc;
  --text-tertiary: #8888aa;
  --accent: #ff6f42;
  --accent-hover: #ff8a65;
  --yellow: #ffe156;
  --blue: #4ecdc4;
  --pink: #ff6b9d;
  --purple: #c77dff;
  --green: #a8e06c;
  --border: #eee;
  --card-bg: #16213e;
  --nav-bg: #0f3460;
  --tag-bg: #233554;
  --tag-text: #b8b8cc;
  --code-bg: #0a0a1a;
  --code-text: #e6edf3;
  --shadow: 4px 4px 0 #eee;
  --shadow-hover: 8px 8px 0 #eee;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  transition: background .3s, color .3s;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color .15s;
}
a:hover { color: var(--accent-hover); }

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

/* ===== Nav ===== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: var(--nav-bg);
  border-bottom: 3px solid var(--border);
}

.nav-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--text);
  letter-spacing: -.03em;
  text-transform: uppercase;
}
.nav-logo .dot { color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.nav-links a {
  color: var(--text);
  font-size: .9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .02em;
  padding: .35rem .7rem;
  border: 2px solid transparent;
  transition: all .15s;
}
.nav-links a:hover {
  border: 2px solid var(--border);
  background: var(--bg);
  box-shadow: 2px 2px 0 var(--border);
  color: var(--text);
}

.theme-toggle {
  background: var(--bg);
  border: 2px solid var(--border);
  cursor: pointer;
  color: var(--text);
  padding: 6px;
  display: flex;
  align-items: center;
  box-shadow: 2px 2px 0 var(--border);
  transition: all .15s;
}
.theme-toggle:hover {
  box-shadow: 3px 3px 0 var(--border);
  transform: translate(-1px, -1px);
}

[data-theme="dark"] .icon-sun { display: none; }
[data-theme="light"] .icon-moon,
:root:not([data-theme="dark"]) .icon-moon { display: none; }

/* ===== Hero ===== */
.hero {
  padding: 130px 1.5rem 60px;
}

.hero-inner {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 3rem;
}

.hero-text { flex: 1; }

.hero-greeting {
  font-size: .85rem;
  color: var(--text);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  margin-bottom: .5rem;
  background: var(--yellow);
  display: inline-block;
  padding: .15rem .5rem;
  border: 2px solid var(--border);
}

/* Name tooltip */
.name-auxten {
  position: relative;
  cursor: help;
  text-decoration: underline dashed var(--accent) 3px;
  text-underline-offset: 4px;
}
.name-auxten::after {
  content: attr(data-tooltip);
  position: absolute;
  top: calc(100% + 2px);
  left: 0;
  width: 300px;
  padding: .75rem 1rem;
  background: var(--card-bg);
  color: var(--text-secondary);
  font-size: .82rem;
  font-weight: 500;
  line-height: 1.6;
  letter-spacing: normal;
  border: 3px solid var(--border);
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s;
  z-index: 10;
}
.name-auxten:hover::after {
  opacity: 1;
}

.name-cn {
  color: var(--text-tertiary);
  font-size: .6em;
  font-weight: 500;
}

.hero-name {
  font-size: 4.5rem;
  font-weight: 900;
  letter-spacing: -.05em;
  line-height: 1;
  margin-bottom: .5rem;
}

.hero-tagline {
  font-size: 1.5rem;
  color: var(--text);
  font-weight: 800;
  margin-bottom: 1.25rem;
  position: relative;
  display: inline-block;
}
.hero-tagline::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 0;
  right: 0;
  height: 8px;
  background: var(--blue);
  z-index: -1;
  opacity: .6;
}

.hero-desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 500px;
  line-height: 1.75;
  margin-bottom: 1.5rem;
}

.hero-social {
  display: flex;
  gap: .6rem;
  flex-wrap: wrap;
}
.hero-social a {
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border: 2px solid var(--border);
  background: var(--bg);
  box-shadow: var(--shadow);
  transition: all .15s;
}
.hero-social a:hover {
  box-shadow: var(--shadow-hover);
  transform: translate(-4px, -4px);
  background: var(--yellow);
  color: var(--text);
}

.hero-avatar img {
  width: 200px;
  height: 200px;
  border-radius: 0;
  border: 4px solid var(--border);
  box-shadow: 8px 8px 0 var(--border);
  object-fit: cover;
}

/* ===== Sections ===== */
.section {
  padding: 50px 1.5rem;
}

.section-inner {
  max-width: 900px;
  margin: 0 auto;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 900;
  letter-spacing: -.03em;
  text-transform: uppercase;
  margin-bottom: 2rem;
  padding-bottom: .5rem;
  border-bottom: 4px solid var(--border);
  display: inline-block;
}

/* ===== Projects ===== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 1.5rem;
}

.project-card {
  background: var(--card-bg);
  border: 3px solid var(--border);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: .75rem;
  box-shadow: var(--shadow);
  transition: all .15s;
  color: var(--text);
  position: relative;
}
.project-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translate(-4px, -4px);
  color: var(--text);
}

.project-card.featured {
  border-color: var(--accent);
  border-width: 3px;
}
.project-card.featured::before {
  content: '';
  position: absolute;
  top: -3px; left: -3px; right: -3px;
  height: 6px;
  background: var(--accent);
}

.project-logo-row {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: .5rem;
  align-self: flex-start;
}

.project-badge {
  font-size: .6rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: #fff;
  background: var(--accent);
  padding: .2rem .5rem;
  border: 2px solid var(--border);
  white-space: nowrap;
  display: inline-block;
}

/* Project logos */
.project-logo {
  height: 36px;
  display: flex;
  align-items: center;
}
.project-logo img {
  height: 36px;
  width: auto;
  object-fit: contain;
}
.logo-dark { display: none; }
[data-theme="dark"] .logo-light { display: none; }
[data-theme="dark"] .logo-dark { display: block; }

.project-card h3 {
  font-size: 1.2rem;
  font-weight: 800;
  font-family: 'JetBrains Mono', monospace;
}

.project-card p {
  font-size: .88rem;
  color: var(--text-secondary);
  line-height: 1.65;
  flex: 1;
}

.project-tags {
  display: flex;
  gap: .4rem;
  flex-wrap: wrap;
}
.project-tags span {
  font-size: .72rem;
  background: var(--tag-bg);
  color: var(--tag-text);
  padding: .2rem .55rem;
  font-weight: 700;
  border: 1.5px solid var(--border);
  text-transform: uppercase;
  letter-spacing: .03em;
}

.project-stars {
  font-family: 'JetBrains Mono', monospace;
  font-size: .78rem;
  font-weight: 700;
  color: var(--text-tertiary);
}

/* Alternate card accent colors */
.project-card:nth-child(2) { border-color: var(--blue); }
.project-card:nth-child(2):hover { background: color-mix(in srgb, var(--blue) 8%, var(--card-bg)); }
.project-card:nth-child(3) { border-color: var(--purple); }
.project-card:nth-child(3):hover { background: color-mix(in srgb, var(--purple) 8%, var(--card-bg)); }
.project-card:nth-child(4) { border-color: var(--pink); }
.project-card:nth-child(4):hover { background: color-mix(in srgb, var(--pink) 8%, var(--card-bg)); }
.project-card:nth-child(5) { border-color: var(--green); }
.project-card:nth-child(5):hover { background: color-mix(in srgb, var(--green) 8%, var(--card-bg)); }
.project-card:nth-child(6) { border-color: var(--yellow); }
.project-card:nth-child(6):hover { background: color-mix(in srgb, var(--yellow) 8%, var(--card-bg)); }
.project-card:nth-child(7) { border-color: var(--blue); }
.project-card:nth-child(7):hover { background: color-mix(in srgb, var(--blue) 8%, var(--card-bg)); }
.project-card:nth-child(8) { border-color: var(--purple); }
.project-card:nth-child(8):hover { background: color-mix(in srgb, var(--purple) 8%, var(--card-bg)); }
.project-card:nth-child(9) { border-color: var(--pink); }
.project-card:nth-child(9):hover { background: color-mix(in srgb, var(--pink) 8%, var(--card-bg)); }

/* ===== Stats Bar ===== */
.stats-section { padding: 0 1.5rem 30px; }

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

.stat-item {
  background: var(--card-bg);
  border: 3px solid var(--border);
  padding: 1.25rem 1rem;
  text-align: center;
  box-shadow: var(--shadow);
  transition: all .15s;
}
.stat-item:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--border);
}

.stat-number {
  display: block;
  font-size: 1.75rem;
  font-weight: 900;
  font-family: 'JetBrains Mono', monospace;
  line-height: 1.2;
}

.stat-label {
  display: block;
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--text-secondary);
  margin-top: .25rem;
}

.stat-orange .stat-number { color: var(--accent); }
.stat-blue .stat-number { color: var(--blue); }
.stat-pink .stat-number { color: var(--pink); }
.stat-green .stat-number { color: var(--green); }

/* ===== Press & Talks ===== */
.press-subhead {
  font-size: 1rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .04em;
  margin: 1.75rem 0 .75rem;
  color: var(--text-secondary);
}
.press-subhead:first-of-type { margin-top: 0; }

.press-list {
  display: grid;
  grid-template-columns: 1fr;
}

.press-item {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding: .7rem .75rem;
  border-bottom: 2px solid var(--border);
  color: var(--text);
  transition: all .15s;
  text-decoration: none;
}
.press-list > .press-item:first-child { border-top: 2px solid var(--border); }
.press-item:hover {
  background: var(--yellow);
  border-color: var(--border);
  color: var(--text);
  transform: translateX(4px);
}

.press-source {
  font-family: 'JetBrains Mono', monospace;
  font-size: .75rem;
  font-weight: 700;
  color: var(--text-tertiary);
  white-space: nowrap;
  min-width: 140px;
  text-transform: uppercase;
  letter-spacing: .03em;
}

.press-title {
  font-weight: 600;
  font-size: .9rem;
}

@media (max-width: 640px) {
  .press-item {
    flex-direction: column;
    gap: .2rem;
  }
  .press-source { min-width: auto; }
}

/* ===== Timeline ===== */
.timeline {
  position: relative;
  padding-left: 2rem;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--border);
}

.timeline-item {
  position: relative;
  margin-bottom: 2rem;
  padding-left: 1.5rem;
}
.timeline-item:last-child { margin-bottom: 0; }

.timeline-marker {
  position: absolute;
  left: -2rem;
  top: .35rem;
  width: 18px;
  height: 18px;
  border: 3px solid var(--border);
  background: var(--bg);
}

.marker-orange { background: var(--accent); }
.marker-blue { background: var(--blue); }
.marker-purple { background: var(--purple); }
.marker-pink { background: var(--pink); }
.marker-green { background: var(--green); }

.timeline-date {
  font-family: 'JetBrains Mono', monospace;
  font-size: .78rem;
  font-weight: 700;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: .04em;
}

.timeline-content h3 {
  font-size: 1.1rem;
  font-weight: 800;
  margin: .15rem 0 .3rem;
}

.timeline-content p {
  font-size: .9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== About ===== */
.about-content {
  max-width: 640px;
  background: var(--card-bg);
  border: 3px solid var(--border);
  padding: 2rem;
  box-shadow: var(--shadow);
}
.about-content p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  line-height: 1.8;
}
.about-content p:last-child { margin-bottom: 0; }
.about-content strong {
  color: var(--text);
  font-weight: 700;
  background: linear-gradient(transparent 60%, var(--yellow) 60%);
}
[data-theme="dark"] .press-item:hover {
  background: rgba(255,225,86,.15);
}

[data-theme="dark"] .about-content strong {
  background: linear-gradient(transparent 60%, rgba(255,225,86,.2) 60%);
}

/* ===== Blog List ===== */
.blog-list {
  display: flex;
  flex-direction: column;
}

.blog-item {
  display: flex;
  align-items: baseline;
  gap: 1.25rem;
  padding: .9rem .75rem;
  border: 2px solid transparent;
  border-bottom: 2px solid var(--border);
  color: var(--text);
  transition: all .15s;
}
.blog-item:first-child { border-top: 2px solid var(--border); }
.blog-item:hover {
  background: var(--yellow);
  border-color: var(--border);
  color: var(--text);
  transform: translateX(4px);
}

.blog-item time {
  font-family: 'JetBrains Mono', monospace;
  font-size: .82rem;
  color: var(--text-tertiary);
  white-space: nowrap;
  min-width: 100px;
  font-weight: 500;
}

.blog-item span {
  font-weight: 700;
  font-size: .95rem;
}

.view-all {
  display: inline-block;
  margin-top: 1.5rem;
  font-weight: 800;
  font-size: .9rem;
  text-transform: uppercase;
  letter-spacing: .03em;
  padding: .4rem .8rem;
  border: 2px solid var(--border);
  background: var(--bg);
  color: var(--text);
  box-shadow: var(--shadow);
  transition: all .15s;
}
.view-all:hover {
  box-shadow: var(--shadow-hover);
  transform: translate(-4px, -4px);
  background: var(--blue);
  color: var(--text);
}

/* ===== Footer ===== */
.footer {
  padding: 2rem 1.5rem;
  border-top: 3px solid var(--border);
  margin-top: 2rem;
}

.footer-inner {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}
.footer p {
  font-size: .82rem;
  color: var(--text-tertiary);
  font-weight: 600;
}
.footer a {
  color: var(--text-secondary);
  text-decoration: underline;
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
  .hero { padding: 100px 1.5rem 40px; }

  .hero-inner {
    flex-direction: column-reverse;
    text-align: center;
    gap: 1.5rem;
  }

  .hero-name { font-size: 3rem; }
  .hero-tagline { font-size: 1.2rem; }
  .hero-desc { margin: 0 auto 1.5rem; }
  .hero-social { justify-content: center; }

  .hero-avatar img {
    width: 140px;
    height: 140px;
    box-shadow: 6px 6px 0 var(--border);
  }

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

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

  .blog-item {
    flex-direction: column;
    gap: .25rem;
  }

  .nav-links { gap: .5rem; }
  .nav-links a { font-size: .8rem; padding: .3rem .5rem; }
}

/* ===== Blog Post Page ===== */
.post-header {
  padding: 120px 1.5rem 2rem;
  max-width: 720px;
  margin: 0 auto;
}

.post-header h1 {
  font-size: 2.5rem;
  font-weight: 900;
  letter-spacing: -.04em;
  line-height: 1.15;
  margin-bottom: .5rem;
}

.post-meta {
  color: var(--text-tertiary);
  font-size: .85rem;
  font-family: 'JetBrains Mono', monospace;
  font-weight: 600;
}

.post-content {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
}

.post-content h2 {
  font-size: 1.5rem;
  font-weight: 900;
  margin: 2.5rem 0 1rem;
  letter-spacing: -.02em;
  border-bottom: 3px solid var(--border);
  padding-bottom: .3rem;
  display: inline-block;
}

.post-content h3 {
  font-size: 1.2rem;
  font-weight: 800;
  margin: 2rem 0 .75rem;
}

.post-content p {
  margin-bottom: 1.25rem;
  color: var(--text-secondary);
  line-height: 1.85;
}

.post-content a {
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 2px;
}

.post-content img {
  border: 3px solid var(--border);
  box-shadow: var(--shadow);
  margin: 1.5rem 0;
}

.post-content code {
  font-family: 'JetBrains Mono', monospace;
  font-size: .88em;
  background: var(--code-bg);
  color: var(--code-text);
  padding: .2em .45em;
  border: 1.5px solid var(--border);
}

.post-content pre {
  background: var(--code-bg);
  color: var(--code-text);
  border: 3px solid var(--border);
  box-shadow: var(--shadow);
  padding: 1.25rem;
  overflow-x: auto;
  margin: 1.5rem 0;
}

.post-content pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: .85rem;
  line-height: 1.6;
  color: inherit;
}

.post-content blockquote {
  border-left: 5px solid var(--accent);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  background: var(--card-bg);
  border: 3px solid var(--border);
  border-left: 6px solid var(--accent);
  box-shadow: var(--shadow);
  font-style: italic;
  color: var(--text-secondary);
}

.post-content ul, .post-content ol {
  margin: 1rem 0 1.25rem 1.5rem;
  color: var(--text-secondary);
}

.post-content li {
  margin-bottom: .4rem;
  line-height: 1.7;
}

.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: .9rem;
  border: 3px solid var(--border);
  box-shadow: var(--shadow);
}

.post-content th, .post-content td {
  border: 2px solid var(--border);
  padding: .6rem .8rem;
  text-align: left;
}

.post-content th {
  background: var(--yellow);
  font-weight: 800;
  text-transform: uppercase;
  font-size: .8rem;
  letter-spacing: .03em;
}

/* ===== Blog Index ===== */
.page-header {
  padding: 120px 1.5rem 2rem;
  max-width: 900px;
  margin: 0 auto;
}

.page-header h1 {
  font-size: 2.5rem;
  font-weight: 900;
  letter-spacing: -.04em;
  text-transform: uppercase;
}