:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #6b7280;
  --link: #2563eb;
  --accent: #0891b2;
  --maxw: 720px;
  --pad: 18px;
  --radius: 10px;
}

/* ── Base ─────────────────────────────────────── */

html {
  scroll-behavior: smooth;
}

html, body {
  height: 100%;
}

body {
  margin: 0;
  font: 16px/1.65 system-ui, -apple-system, Segoe UI, Roboto, Ubuntu,
    Cantarell, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection {
  background: color-mix(in oklab, var(--link) 20%, transparent);
}

p {
  margin: 0 0 14px;
}

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

a {
  color: var(--link);
  text-decoration-color: color-mix(in oklab, var(--link) 35%, transparent);
  text-underline-offset: 2px;
  transition: color 0.15s ease, text-decoration-color 0.15s ease;
}

a:hover {
  text-decoration-color: currentColor;
}

/* ── Layout ───────────────────────────────────── */

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: calc(var(--pad) * 1.25) var(--pad);
}

/* ── Header ───────────────────────────────────── */

header {
  position: sticky;
  top: 0;
  background: color-mix(in oklab, var(--bg) 90%, transparent);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid color-mix(in oklab, var(--fg) 8%, transparent);
  z-index: 10;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
}

.header-inner > strong a {
  text-decoration: none;
  color: inherit;
}

nav ul {
  display: flex;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}

nav a {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 8px;
  text-decoration: none;
  color: var(--fg);
  font-size: 15px;
  transition: background 0.15s ease;
}

nav a:hover,
nav a:focus-visible {
  outline: none;
  background: color-mix(in oklab, var(--fg) 8%, transparent);
}

/* ── Title / subtitle ─────────────────────────── */

.title {
  margin: 28px 0 4px;
  font-size: clamp(28px, 5vw, 40px);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

/* ── Intro + avatar ───────────────────────────── */

.intro {
  display: grid;
  grid-template-columns: 1fr 140px;
  align-items: start;
  gap: 24px;
  margin: 0 0 24px;
}

@media (max-width: 560px) {
  .intro {
    grid-template-columns: 1fr;
  }

  .avatar {
    order: -1;
    justify-self: center;
  }
}

.avatar {
  width: 140px;
  aspect-ratio: 1;
  border-radius: 14px;
  object-fit: cover;
  border: 2px solid color-mix(in oklab, var(--fg) 8%, transparent);
  box-shadow: 0 2px 12px color-mix(in oklab, var(--fg) 8%, transparent);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.avatar:hover {
  transform: scale(1.04);
  box-shadow: 0 6px 24px color-mix(in oklab, var(--fg) 12%, transparent);
}

/* ── Demo grid ────────────────────────────────── */

.demo-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 0 0 24px;
}

@media (max-width: 560px) {
  .demo-grid {
    grid-template-columns: 1fr;
  }
}

.demo-grid img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid color-mix(in oklab, var(--fg) 12%, transparent);
}

/* ── Sections ─────────────────────────────────── */

main section {
  margin: 44px 0;
}

h2 {
  font-size: 20px;
  margin: 22px 0 12px;
  border-bottom: 1px solid color-mix(in oklab, var(--fg) 12%, transparent);
  padding-bottom: 6px;
}

/* ── Generic card ─────────────────────────────── */

.card {
  border: 1px solid color-mix(in oklab, var(--fg) 12%, transparent);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin: 10px 0;
}

/* ── Publications ─────────────────────────────── */

.pub-item {
  margin: 0;
}

.pub-title {
  font-weight: 600;
  margin-bottom: 4px;
}

.pub-authors {
  color: var(--muted);
  font-size: 15px;
  margin-bottom: 4px;
}

.pub-venue {
  font-style: italic;
  margin-bottom: 8px;
}

.pub-links {
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.pub-links img {
  vertical-align: middle;
}

/* ── Clean lists (talks, etc.) ────────────────── */

ul.clean {
  list-style: none;
  padding: 0;
  margin: 8px 0;
}

ul.clean li {
  margin: 8px 0;
}

/* ── Open-access note ────────────────────────── */

.open-access {
  font-size: 14px;
  font-style: italic;
  margin: 36px 0 0;
}

/* ── Footer ───────────────────────────────────── */

footer {
  margin-top: 48px;
  padding-top: 18px;
  border-top: 1px solid color-mix(in oklab, var(--fg) 8%, transparent);
  font-size: 14px;
  color: var(--muted);
}

footer a {
  color: var(--muted);
  transition: color 0.15s ease;
}

footer a:hover {
  color: var(--link);
}

/* ── Skip link ────────────────────────────────── */

.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.skip-link:focus {
  position: static;
  width: auto;
  height: auto;
  padding: 8px 10px;
  border-radius: 8px;
  background: color-mix(in oklab, var(--fg) 10%, var(--bg));
}