:root {
  --bg: #f7f8fa;
  --panel: #ffffff;
  --text: #334155;
  --heading: #0f172a;
  --muted: #64748b;
  --accent: #0f766e;
  --border: #dbe2ea;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Monaco, Consolas, monospace;
  line-height: 1.6;
}

.site-nav {
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}

.site-nav ul {
  list-style: none;
  margin: 0 auto;
  padding: 14px 20px;
  max-width: 760px;
  display: flex;
  gap: 22px;
  align-items: center;
  justify-content: center;
}

.site-nav a {
  color: var(--heading);
  text-decoration: none;
  font-family: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Monaco, Consolas, monospace;
  font-size: 0.9rem;
  font-weight: 600;
  transition: color 140ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.site-nav a[aria-current="page"] {
  color: var(--accent);
  outline: none;
}

.page {
  max-width: 760px;
  margin: 0 auto;
  padding: 44px 20px 56px;
  text-align: left;
}

.page-title {
  margin: 0 0 12px;
  color: var(--heading);
  line-height: 1.2;
  text-align: center;
}

.page > .page-title:first-child {
  font-size: clamp(1.9rem, 4vw, 2.7rem);
}

.section-title {
  margin-top: 26px;
  margin-bottom: 8px;
  color: var(--muted);
  font-family: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Monaco, Consolas, monospace;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-align: center;
}

.page-intro + .section-title {
  margin-top: 14px;
}

.page-intro {
  margin: 0;
  max-width: 65ch;
  font-size: 1.05rem;
  line-height: 1.72;
}

.page-intro + .page-intro {
  margin-top: 12px;
}

.about-bio {
  color: var(--text);
}

.profile-links {
  margin: 12px auto 0;
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  max-width: 560px;
}

.profile-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 58px;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--panel);
  text-decoration: none;
  transition: border-color 140ms ease, transform 140ms ease;
}

.profile-link:hover,
.profile-link:focus-visible {
  border-color: #a4b5c8;
  transform: translateY(-1px);
  outline: none;
}

.profile-link-icon {
  display: block;
  flex-shrink: 0;
  object-fit: contain;
  max-width: 100%;
  width: auto;
  height: auto;
}

.profile-link-icon-github {
  width: 142px;
}

.profile-link-icon-linkedin {
  width: 130px;
}

.accordion-controls {
  margin: 8px auto;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
}

.page-intro + .accordion-controls {
  margin-top: 10px;
}

.accordion-control-btn {
  padding: 6px 10px;
  min-width: 120px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
  color: var(--heading);
  font-family: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Monaco, Consolas, monospace;
  font-size: 0.78rem;
  cursor: pointer;
  transition: border-color 140ms ease, color 140ms ease;
}

.accordion-control-label {
  display: inline-block;
  transition: opacity 130ms ease, transform 180ms ease;
}

.accordion-control-btn.is-label-changing .accordion-control-label {
  opacity: 0;
  transform: translateY(-4px);
}

.accordion-control-btn:hover,
.accordion-control-btn:focus-visible {
  border-color: #a4b5c8;
  color: var(--accent);
  outline: none;
}

.accordion-control-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.project-accordion {
  margin-top: 8px;
  margin-left: auto;
  margin-right: auto;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--panel);
  overflow: hidden;
  text-align: left;
}

.project-summary {
  position: relative;
  list-style: none;
  cursor: pointer;
  padding: 13px 46px 13px 14px;
  color: var(--heading);
  font-family: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Monaco, Consolas, monospace;
  font-weight: 600;
  line-height: 1.5;
}

.project-summary::-webkit-details-marker {
  display: none;
}

.project-summary::after {
  content: "+";
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%) rotate(0deg);
  transform-origin: center;
  color: var(--accent);
  font-weight: 700;
  transition: transform 180ms ease;
}

.project-accordion[open] .project-summary::after {
  transform: translateY(-50%) rotate(45deg);
}

.project-accordion.is-animated .project-summary::after {
  transform: translateY(-50%) rotate(0deg);
}

.project-accordion.is-animated.is-expanded .project-summary::after {
  transform: translateY(-50%) rotate(45deg);
}

.project-content {
  border-top: 1px solid var(--border);
  background: var(--panel);
}

.project-content-inner {
  display: flow-root;
  padding: 0 14px 12px;
}

.project-accordion.is-animated .project-content {
  height: 0;
  overflow: hidden;
  opacity: 0;
  border-top-color: transparent;
  transition:
    height 340ms cubic-bezier(0.25, 0.8, 0.25, 1),
    opacity 240ms ease,
    border-top-color 200ms ease;
  will-change: height;
}

.project-accordion.is-animated.is-expanded .project-content {
  opacity: 1;
  border-top-color: var(--border);
}

.project-summary-link,
.project-summary-link:visited {
  color: inherit;
  text-decoration: none;
  font-weight: 600;
}

.project-summary-link:hover,
.project-summary-link:focus-visible {
  color: var(--accent);
  outline: none;
}

.project-description {
  margin: 10px 0 0;
}

.paper-links {
  margin: 12px 0 0;
}

.paper-links-sep {
  color: var(--muted);
  margin: 0 6px;
}

@media (max-width: 700px) {
  .site-nav ul {
    gap: 14px;
    flex-wrap: wrap;
    padding-top: 12px;
    padding-bottom: 12px;
  }

  .site-nav a {
    font-size: 0.82rem;
  }

  .page {
    padding-top: 34px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition-duration: 0ms !important;
  }
}