:root {
  --bg: #ffffff;
  --surface: #ffffff;
  --text: #000000;
  --text-dim: #555555;
  --border: #dddddd;
  --accent: #000000;
  --accent-soft: #f2f2f2;
  --mono: "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;
  --radius: 10px;
  --shadow: none;
  --max: 920px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.55;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- header ---------- */

header.site {
  border-bottom: 1px solid var(--border);
  padding: 18px 0;
  position: sticky;
  top: 0;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  z-index: 10;
}

header.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

nav.site-nav { margin-left: auto; display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 6px 22px; font-size: 14px; }
@media (max-width: 720px) { nav.site-nav { gap: 6px 14px; } }
nav.site-nav a { color: var(--text-dim); }
nav.site-nav a:hover { color: var(--text); text-decoration: none; }

/* ---------- hero ---------- */

.hero { padding: 64px 0 40px; }
.hero-row { display: flex; align-items: center; gap: 32px; }
.hero-text { min-width: 0; }
.avatar {
  width: 160px; height: 160px; flex: none; border-radius: 50%; object-fit: cover;
  box-shadow: 0 10px 28px rgb(0 0 0 / 18%);
}
@media (max-width: 720px) {
  .hero-row { flex-direction: column; align-items: flex-start; gap: 24px; }
  .avatar { width: 128px; height: 128px; }
}
.hero .kicker {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0 0 12px;
}
.hero h1 {
  font-size: 40px;
  line-height: 1.15;
  margin: 0 0 14px;
  letter-spacing: -0.02em;
}
.hero p.lede {
  font-size: 17px;
  color: var(--text-dim);
  max-width: 640px;
  margin: 0 0 24px;
}

.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 8px; }
.tag {
  font-family: var(--mono);
  font-size: 12.5px;
  padding: 5px 11px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-dim);
  background: var(--surface);
  transition: all .15s ease;
}
.tag:hover { border-color: var(--accent); color: var(--text); text-decoration: none; }

/* ---------- sections ---------- */

section { padding: 40px 0; }
section.bordered { border-top: 1px solid var(--border); }

h2.section-title {
  font-size: 13px;
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin: 0 0 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}
h2.section-title::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ---------- project grid ---------- */

.grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
@media (max-width: 720px) { .grid { grid-template-columns: 1fr; } }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  transition: transform .15s ease, border-color .15s ease;
}
.card:hover { transform: translateY(-2px); border-color: var(--accent); }

.card-media {
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, var(--accent-soft), var(--surface));
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.card-media img { width: 100%; height: 100%; object-fit: cover; }
.card-media iframe { width: 100%; height: 100%; border: 0; }
.card-media .glyph {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
  opacity: 0.7;
}

.card-body { padding: 18px 20px 20px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.card-body h3 { margin: 0; font-size: 18px; letter-spacing: -0.01em; }
.card-body p { margin: 0; color: var(--text-dim); font-size: 14.5px; }

.card-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.card-tags span {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-dim);
  border: 1px solid var(--border);
  padding: 2px 8px;
  border-radius: 999px;
}

.card-links {
  margin-top: auto;
  display: flex;
  gap: 16px;
  font-size: 13.5px;
  font-family: var(--mono);
  padding-top: 8px;
}

.status-note {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text-dim);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
}

/* ---------- publications ---------- */

.pub {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.pub h3 { margin: 0; font-size: 16px; }
.pub .venue { color: var(--accent); font-family: var(--mono); font-size: 13px; }
.pub .authors { color: var(--text-dim); font-size: 14px; }
.pub .links { font-family: var(--mono); font-size: 13px; margin-top: 4px; }

/* ---------- contact / footer ---------- */

.contact-links { display: flex; flex-wrap: wrap; gap: 10px 24px; font-family: var(--mono); font-size: 14.5px; }

footer {
  border-top: 1px solid var(--border);
  padding: 28px 0 48px;
  color: var(--text-dim);
  font-size: 13px;
  font-family: var(--mono);
}

/* ---------- project detail page ---------- */

.project-hero { padding: 48px 0 8px; }
.project-hero .back {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text-dim);
  display: inline-block;
  margin-bottom: 18px;
}
.project-hero h1 { font-size: 32px; margin: 0 0 10px; letter-spacing: -0.02em; }
.project-hero p.summary { color: var(--text-dim); font-size: 16px; max-width: 680px; margin: 0 0 18px; }

.project-links { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 8px; }
.pill-link {
  font-family: var(--mono);
  font-size: 13.5px;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 7px 14px;
  color: var(--text);
  background: var(--surface);
}
.pill-link:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }

.media-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
@media (max-width: 720px) { .media-grid { grid-template-columns: repeat(2, 1fr); } }
.media-grid .ph {
  aspect-ratio: 4/3;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-dim);
  text-align: center;
  padding: 8px;
}

.video-embed {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: #000;
}
.video-embed iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: 0; }

.arch-diagram {
  font-family: var(--mono);
  font-size: 13.5px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  overflow-x: auto;
}
.arch-flow {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.arch-box {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  background: var(--accent-soft);
  color: var(--text);
  white-space: nowrap;
}
.arch-arrow { color: var(--text-dim); }
.arch-note {
  margin-top: 14px;
  color: var(--text-dim);
  font-size: 13px;
}

.prose { font-size: 15.5px; }
.prose h3 { font-size: 16px; margin-top: 28px; }
.prose ul { padding-left: 20px; }
.prose li { margin-bottom: 6px; color: var(--text-dim); }
.prose a { text-decoration: underline; text-underline-offset: 3px; text-decoration-color: var(--accent); }