:root {
  --bg: #060a08;
  --bg-alt: #0b1210;
  --surface: #101a16;
  --ink: #e8f4ec;
  --muted: #93b3a3;
  --green: #00e58f;
  --cyan: #35d6ff;
  --amber: #ffb545;
  --line: #1c2a24;
  --glow: rgba(0, 229, 143, .35);
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, "Cascadia Code", Consolas, monospace;
}

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

html {
  scrollbar-color: var(--line) var(--bg);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
}

h1,
h2,
h3 {
  margin: 0 0 .75rem;
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.15;
  color: var(--ink);
}

p {
  margin: 0 0 1rem;
}

ul {
  padding-left: 1.25rem;
}

code,
pre {
  font-family: var(--font-mono);
}

pre {
  overflow-x: auto;
}

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

a:hover {
  text-decoration: underline;
  text-underline-offset: .2em;
}

.brand:hover,
.nav-link:hover,
.btn:hover,
.card-title a:hover,
.paper-title a:hover,
.post-title a:hover {
  text-decoration: none;
}

::selection {
  background: var(--green);
  color: #04120b;
}

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

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: var(--line);
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(0, 229, 143, .4);
}

.skip-link {
  position: fixed;
  top: -4rem;
  left: 1rem;
  z-index: 100;
  padding: .6rem 1.1rem;
  background: var(--green);
  color: #04120b;
  font-family: var(--font-mono);
  font-size: .85rem;
  font-weight: 700;
  border-radius: 8px;
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(6, 10, 8, .82);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  height: 60px;
}

.brand {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--ink);
}

.brand svg {
  color: var(--green);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
}

.line {
  display: block;
  width: 20px;
  height: 2px;
  margin: 2.5px auto;
  background: var(--ink);
  transition: transform .2s ease, opacity .2s ease;
}

.nav-toggle[aria-expanded="true"] .line:nth-child(1) {
  transform: translateY(4.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .line:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .line:nth-child(3) {
  transform: translateY(-4.5px) rotate(-45deg);
}

.site-nav {
  display: flex;
  gap: 1.5rem;
}

.nav-link {
  padding: .4rem .1rem;
  font-family: var(--font-mono);
  font-size: .85rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
}

.nav-link:hover,
.nav-link:focus-visible,
.nav-link[aria-current="page"] {
  color: var(--green);
}

.page-main {
  display: block;
}

.container {
  max-width: 1100px;
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2rem);
}

.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: grid;
  place-items: center;
  overflow: hidden;
  padding-block: 4rem;
}

#pcb-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

#pcb-bg svg {
  display: block;
}

.pcb-chip {
  pointer-events: auto;
  cursor: pointer;
  outline-offset: 4px;
}

.pcb-chip:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 4px;
}

.pcb-chip .pcb-chip-body {
  transition: filter .25s;
}

.pcb-chip.hot .pcb-chip-body {
  filter: drop-shadow(0 0 8px var(--glow));
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 46rem;
  pointer-events: auto;
}

.hero-kicker {
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--green);
}

.hero-title {
  margin-block: 1rem;
  font-size: clamp(2.2rem, 6vw, 4rem);
  line-height: 1.1;
}

.hero-subtitle {
  max-width: 38rem;
  color: var(--muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 2rem;
}

.hero-hint {
  margin-top: 1.5rem;
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--muted);
  opacity: .8;
}

.btn {
  display: inline-block;
  padding: .7rem 1.4rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: .85rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink);
  transition: border-color .2s ease, box-shadow .2s ease;
}

.btn:hover,
.btn:focus-visible {
  border-color: var(--green);
  color: var(--green);
}

.btn-primary {
  background: var(--green);
  border-color: var(--green);
  color: #04120b;
  font-weight: 700;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  box-shadow: 0 0 18px var(--glow);
  color: #04120b;
}

.section {
  padding-block: clamp(3rem, 8vw, 5.5rem);
}

.section-title {
  margin-bottom: .5rem;
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.section-intro {
  max-width: 62ch;
  margin-bottom: 2rem;
  color: var(--muted);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.card {
  padding: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  transition: border-color .2s ease, transform .2s ease;
}

.card:hover {
  border-color: rgba(0, 229, 143, .5);
  transform: translateY(-2px);
}

.card-title {
  margin-block: .25rem;
}

.card-title a,
.paper-title a,
.post-title a {
  color: var(--ink);
}

.card-title a:hover,
.card-title a:focus-visible,
.paper-title a:hover,
.paper-title a:focus-visible,
.post-title a:hover,
.post-title a:focus-visible {
  color: var(--green);
}

.card-meta {
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--muted);
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  margin: .75rem 0 0;
  padding: 0;
  list-style: none;
}

.tag,
.badge {
  padding: .12rem .55rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  border: 1px solid var(--line);
  border-radius: 999px;
}

.tag {
  color: var(--cyan);
}

.badge {
  color: var(--amber);
}

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

.paper-item {
  display: grid;
  grid-template-columns: 5.5ch 1fr;
  gap: 1rem;
  padding-block: 1.1rem;
  border-bottom: 1px solid var(--line);
}

.paper-year {
  font-family: var(--font-mono);
  color: var(--muted);
}

.paper-venue {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--cyan);
}

.paper-title {
  margin: .25rem 0;
  font-size: 1.05rem;
}

.paper-authors {
  margin: 0 0 .5rem;
  font-size: .9rem;
  color: var(--muted);
}

.paper-links {
  margin: 0;
}

.paper-links a {
  margin-right: 1rem;
  font-family: var(--font-mono);
  font-size: .85rem;
}

.post-list {
  display: grid;
  gap: 1.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.post-item {
  padding: 1.25rem 1.5rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  transition: border-color .2s ease;
}

.post-item:hover {
  border-color: rgba(0, 229, 143, .5);
}

.post-meta {
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--muted);
}

.post-excerpt {
  color: var(--muted);
}

article.post {
  max-width: 74ch;
  margin-block: 3rem;
}

article.post .post-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
}

.post-body {
  max-width: 70ch;
}

.post-body h2 {
  margin-top: 2.2rem;
  font-size: 1.3rem;
}

.post-body pre {
  padding: 1rem;
  overflow-x: auto;
  background: var(--bg-alt);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: .9rem;
}

.post-body code {
  font-family: var(--font-mono);
  font-size: .92em;
  color: var(--cyan);
}

.post-body blockquote {
  padding-left: 1rem;
  border-left: 2px solid var(--green);
  color: var(--muted);
}

.post-body ul {
  padding-left: 1.25rem;
}

.two-col {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2.5rem;
  align-items: start;
}

.timeline {
  display: grid;
  gap: 1.5rem;
  margin: 0;
  padding: 0 0 0 1.5rem;
  list-style: none;
  border-left: 1px solid var(--line);
}

.timeline-item {
  position: relative;
}

.timeline-item::before {
  content: "";
  position: absolute;
  top: .45rem;
  left: calc(-1.5rem - 4px);
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px var(--glow);
}

.timeline-date {
  margin: 0 0 .25rem;
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--green);
}

.contact-card {
  display: grid;
  gap: .5rem;
  max-width: 480px;
  padding: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
}

.site-footer {
  padding-block: 2rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .9rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-inner p {
  margin: 0;
}

.footer-links a {
  margin-inline: .25rem;
  color: var(--muted);
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--green);
}

.error-page {
  min-height: 70vh;
  display: grid;
  place-items: center;
  text-align: center;
}

.error-page h1 {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 7vw, 3.5rem);
  color: var(--green);
}

html.js .reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .5s ease, transform .5s ease;
}

html.js .reveal.visible {
  opacity: 1;
  transform: none;
}

@media (max-width: 900px) {
  .two-col {
    gap: 1.75rem;
  }
}

@media (max-width: 600px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    display: none;
  }

  .site-nav.open {
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    display: flex;
    flex-direction: column;
    gap: .75rem;
    padding: 1rem;
    background: var(--bg-alt);
    border-bottom: 1px solid var(--line);
  }

  .paper-item {
    grid-template-columns: 1fr;
    gap: .15rem;
  }

  .footer-inner {
    flex-direction: column;
    justify-content: center;
    justify-items: center;
    align-items: center;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    transition-delay: 0ms !important;
    scroll-behavior: auto !important;
  }

  html.js .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}