:root {
  color-scheme: light;
  --bg: #0b1220;
  --paper: #111c2e;
  --ink: #e8eef8;
  --muted: #9aaac0;
  --line: #293b56;
  --accent: #4f8fe8;
  --accent-2: #66a3d9;
  --soft: #17263b;
  --shadow: 0 22px 60px rgba(0, 0, 0, 0.28);
  --max: 1120px;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --sans: "Segoe UI", "Noto Sans SC", Arial, sans-serif;
  --serif: Georgia, "Times New Roman", serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background:
    linear-gradient(90deg, rgba(125, 166, 214, 0.055) 1px, transparent 1px) 0 0 / 32px 32px,
    linear-gradient(0deg, rgba(125, 166, 214, 0.055) 1px, transparent 1px) 0 0 / 32px 32px,
    var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.6;
}

main {
  flex: 1 0 auto;
}

a {
  color: inherit;
}

button {
  font: inherit;
}

.skip-link {
  position: fixed;
  left: 1rem;
  top: 1rem;
  z-index: 10;
  transform: translateY(-150%);
  background: var(--ink);
  color: var(--paper);
  padding: 0.6rem 0.8rem;
  border-radius: 6px;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  background: rgba(11, 18, 32, 0.9);
  border-bottom: 1px solid rgba(142, 174, 211, 0.18);
  backdrop-filter: blur(14px);
}

.header-inner,
.hero-band,
.content-band,
.site-footer,
.doc-band {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
}

.header-inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  min-width: max-content;
}

.brand-mark,
.portrait-placeholder,
.mini-profile-placeholder {
  display: grid;
  place-items: center;
  color: var(--paper);
  background: #163b69;
  border-radius: 8px;
}

.brand-mark {
  width: 58px;
  height: 42px;
  font-family: var(--serif);
  font-size: 1.05rem;
  font-weight: 700;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  line-height: 1.1;
  font-size: 1.05rem;
}

.brand small {
  color: var(--muted);
  font-size: 0.8rem;
}

.top-nav {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.28rem;
  background: rgba(17, 28, 46, 0.68);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.nav-tab {
  min-height: 38px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  padding: 0 0.8rem;
  cursor: pointer;
  font-weight: 700;
}

.nav-tab:hover,
.nav-tab:focus-visible {
  color: var(--ink);
  background: var(--soft);
}

.nav-tab.is-active {
  background: var(--ink);
  color: var(--paper);
}

.view {
  animation: fade-in 180ms ease;
}

@keyframes fade-in {
  from {
    opacity: 0;
    transform: translateY(5px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-band {
  padding: clamp(2.4rem, 6vw, 5rem) 0 clamp(2.5rem, 5vw, 4rem);
}

.hero-grid,
.resume-layout,
.blog-shell,
.reader-layout,
.doc-layout {
  display: grid;
  gap: clamp(1.2rem, 3vw, 2rem);
  align-items: start;
}

.hero-grid {
  grid-template-columns: minmax(0, 1fr) 320px;
  align-items: center;
}

.hero-copy h1,
.section-heading h1,
.section-heading h2,
.profile-card h2,
.reader-meta h2,
.doc-meta h1 {
  font-family: var(--serif);
}

.hero-copy h1 {
  margin: 0;
  font-size: clamp(2.6rem, 7vw, 5.8rem);
  line-height: 0.98;
}

.lead {
  max-width: 760px;
  margin: 1.3rem 0 0;
  color: #c6d4e6;
  font-size: clamp(1rem, 1.5vw, 1.22rem);
}

.eyebrow {
  margin: 0 0 0.7rem;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
}

.fact-grid,
.news-list,
.paper-list,
.blog-list,
.category-list {
  display: grid;
  gap: 0.8rem;
}

.fact-grid {
  margin-top: 1.8rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.fact-item,
.empty-state,
.loading-line {
  border: 1px dashed var(--line);
  border-radius: 8px;
  background: rgba(17, 28, 46, 0.62);
  color: var(--muted);
  padding: 1rem;
}

.profile-card,
.reader-content {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.profile-card {
  padding: 1rem;
}

.portrait-frame {
  aspect-ratio: 3 / 4;
  overflow: hidden;
  border-radius: 8px;
  background: var(--soft);
  border: 1px solid var(--line);
}

.portrait-frame img,
.mini-profile img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

.portrait-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #101f36, #245a96);
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

.profile-card h2 {
  margin: 1rem 0 0.25rem;
  font-size: 1.7rem;
}

.profile-card p {
  margin: 0;
  color: var(--muted);
}

.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 1rem;
}

.social-link,
.text-button,
.category-button {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
}

.social-link,
.category-button {
  border: 1px solid var(--line);
  background: #16243a;
  color: #dbe8f7;
  padding: 0 0.7rem;
  text-decoration: none;
}

.content-band {
  padding: clamp(1.8rem, 4vw, 3.5rem) 0 clamp(3rem, 6vw, 5rem);
}

.section-heading {
  margin-bottom: 1.2rem;
}

.section-heading h1,
.section-heading h2 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1;
}

.news-item,
.research-item,
.paper-item,
.blog-item,
.resume-entry {
  border-top: 1px solid var(--line);
  padding: 1rem 0;
}

.news-item {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr);
  gap: 1rem;
}

.research-list {
  display: grid;
  gap: 0;
}

.research-item {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  align-items: flex-start;
}

.research-main {
  min-width: 0;
}

.research-topline {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: flex-start;
}

.research-kicker {
  margin: 0 0 0.2rem;
  color: var(--accent-2);
  font-family: var(--mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.research-item h3 {
  margin: 0;
  font-size: 1.25rem;
}

.research-item time {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.82rem;
  white-space: nowrap;
}

.research-item p:not(.research-kicker) {
  max-width: 820px;
  margin: 0.55rem 0 0;
  color: #c6d4e6;
}

.research-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.75rem;
}

.research-tags span {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.18rem 0.55rem;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
}

.research-link {
  flex: 0 0 auto;
}

.resume-layout {
  grid-template-columns: 260px minmax(0, 1fr);
}

.resume-toc,
.blog-sidebar,
.reader-toc,
.doc-toc {
  position: sticky;
  top: 96px;
}

.mini-profile {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 1rem;
}

.mini-profile-placeholder {
  height: 76px;
  background: linear-gradient(135deg, #12365d, #3475b8);
  font-family: var(--mono);
  text-transform: uppercase;
}

.resume-toc nav,
.reader-toc {
  display: grid;
  gap: 0.2rem;
  border-left: 1px solid var(--line);
  padding-left: 0.8rem;
}

.resume-header {
  padding: 1rem 0 1.35rem;
  border-top: 2px solid var(--ink);
  border-bottom: 1px solid var(--line);
}

.resume-contact {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem 1rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.resume-contact a {
  color: var(--muted);
  text-decoration: none;
}

.resume-contact a:hover,
.resume-contact a:focus-visible {
  color: var(--ink);
}

.resume-section {
  scroll-margin-top: 96px;
  padding: 1.55rem 0 0;
}

.resume-section > h2 {
  margin: 0 0 0.8rem;
  color: #8fb5df;
  font-family: var(--mono);
  font-size: 0.92rem;
  text-transform: uppercase;
}

.entry-topline,
.paper-item,
.blog-item {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: flex-start;
}

.entry-topline h3,
.paper-item h2,
.blog-item h2 {
  margin: 0;
}

.entry-subline,
.item-meta,
.news-item time,
.paper-item span {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.82rem;
}

.blog-shell {
  grid-template-columns: 220px minmax(0, 1fr);
}

.blog-main {
  min-width: 0;
}

.category-button {
  width: 100%;
  justify-content: space-between;
  cursor: pointer;
}

.category-button.is-active {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--paper);
}

.text-button {
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  padding: 0 0.9rem;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
}

.text-button:hover,
.text-button:focus-visible {
  background: transparent;
  color: var(--ink);
}

.blog-reader {
  position: relative;
  margin-top: 1.2rem;
  border-top: 2px solid var(--ink);
  padding-top: 1.3rem;
}

.icon-button {
  position: absolute;
  top: 1.1rem;
  right: 0;
  width: 38px;
  height: 38px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
  cursor: pointer;
}

.reader-content {
  min-width: 0;
  padding: clamp(1rem, 3vw, 2rem);
}

.document-view {
  min-width: 0;
}

.doc-band {
  padding: clamp(1.6rem, 4vw, 3.2rem) 0 clamp(4rem, 7vw, 6rem);
}

.doc-header {
  display: grid;
  grid-template-columns: max-content minmax(0, 1fr);
  gap: clamp(1rem, 3vw, 2rem);
  align-items: center;
  padding: 0.72rem 0 0.78rem;
  border-top: 2px solid var(--ink);
  border-bottom: 1px solid var(--line);
}

.doc-layout {
  grid-template-columns: minmax(0, 1fr) 240px;
  margin-top: clamp(1.1rem, 2.4vw, 1.9rem);
}

.doc-content {
  background: transparent;
  box-shadow: none;
}

.site-footer {
  padding: 1.4rem 0 2rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
}

.visitor-stats {
  white-space: nowrap;
}

.visitor-stats > span + span {
  margin-left: 0.85rem;
}

.visitor-count {
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

@media (max-width: 860px) {
  .header-inner {
    min-height: auto;
    padding: 0.75rem 0;
    align-items: stretch;
    flex-direction: column;
  }

  .top-nav {
    width: 100%;
    overflow-x: auto;
  }

  .nav-tab {
    flex: 1 0 auto;
  }

  .hero-grid,
  .resume-layout,
  .blog-shell,
  .reader-layout,
  .doc-layout {
    grid-template-columns: 1fr;
  }

  .resume-toc,
  .blog-sidebar,
  .reader-toc,
  .doc-toc {
    position: static;
  }
}

@media (max-width: 620px) {
  body {
    background-size: 24px 24px;
  }

  .header-inner,
  .hero-band,
  .content-band,
  .site-footer,
  .doc-band {
    width: min(100% - 24px, var(--max));
  }

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

  .news-item,
  .research-item,
  .paper-item,
  .blog-item,
  .entry-topline,
  .site-footer {
    grid-template-columns: 1fr;
    flex-direction: column;
    align-items: flex-start;
  }

  .research-topline {
    flex-direction: column;
    gap: 0.2rem;
  }
}