:root {
  --bg: #ffffff;
  --surface: #f6f7f9;
  --text: #1c1f24;
  --muted: #5d6470;
  --border: #e4e7eb;
  --accent: #0b5cad;
  --accent-soft: #e8f0fa;
  --max: 860px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111418;
    --surface: #1a1e24;
    --text: #e6e8eb;
    --muted: #9aa3ad;
    --border: #2a3038;
    --accent: #6fb0f5;
    --accent-soft: #1b2a3b;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 16.5px;
  line-height: 1.65;
}

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 20px;
}

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

/* Header + tabs */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 60px;
  flex-wrap: wrap;
}

.brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
  letter-spacing: -0.01em;
}
.brand:hover { text-decoration: none; }

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.tabs a {
  padding: 6px 12px;
  border-radius: 8px;
  color: var(--muted);
  font-weight: 500;
  font-size: 0.95rem;
  white-space: nowrap;
}
.tabs a:hover { color: var(--text); background: var(--surface); text-decoration: none; }
.tabs a.active { color: var(--accent); background: var(--accent-soft); }
.tabs a.cv { border: 1px solid var(--border); margin-left: 6px; }

/* Content */
.content { padding-top: 40px; padding-bottom: 64px; }

h1, h2, h3 { line-height: 1.25; letter-spacing: -0.015em; }
h1 { font-size: 2rem; margin: 0 0 0.5em; }
h2 {
  font-size: 1.35rem;
  margin: 2.2em 0 0.8em;
  padding-bottom: 0.35em;
  border-bottom: 1px solid var(--border);
}
h3 { font-size: 1.05rem; margin: 1.6em 0 0.5em; color: var(--muted); text-transform: uppercase; letter-spacing: 0.04em; }

ul { padding-left: 1.2em; }
li { margin: 0.35em 0; }

/* Home hero */
.hero {
  display: grid;
  grid-template-columns: 380px minmax(0, 1fr);
  gap: 32px;
  align-items: center;
}
.hero img {
  width: 100%;
  height: auto;
  border-radius: 14px;
  border: 1px solid var(--border);
}
.hero .role { color: var(--muted); margin-top: -0.4em; }
.hero .links { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 1em; }
.button {
  display: inline-block;
  padding: 7px 14px;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-weight: 500;
  font-size: 0.95rem;
}
.button:hover { text-decoration: none; opacity: 0.9; }
.button.ghost { background: transparent; color: var(--accent); border: 1px solid var(--border); }

@media (max-width: 640px) {
  .hero { grid-template-columns: minmax(0, 1fr); gap: 20px; }
  .hero img { max-width: 100%; }
  .header-inner { padding-top: 8px; padding-bottom: 8px; }
  .tabs a { padding: 5px 9px; }
  h1 { font-size: 1.7rem; }
}

/* Publications */
.pubs { list-style: none; padding: 0; }
.pubs li {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  margin: 0;
}
.pubs li:last-child { border-bottom: none; }
.pubs .title { font-weight: 600; display: block; }
.pubs .authors { color: var(--muted); font-size: 0.95rem; }
.pubs .venue { font-style: italic; }

/* Simple dated list (awards, talks) */
.dated { list-style: none; padding: 0; }
.dated li { display: grid; grid-template-columns: 140px 1fr; gap: 12px; margin: 0.5em 0; }
.dated .when { color: var(--muted); font-variant-numeric: tabular-nums; white-space: nowrap; }
@media (max-width: 640px) {
  .dated li { grid-template-columns: 1fr; gap: 0; }
}

.note {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 18px;
  color: var(--muted);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
  padding: 24px 0;
}

.pubs .title a { color: var(--text); }
.pubs .title a:hover { color: var(--accent); }
.pubs .authors, .pubs .venue { display: block; }
.pubs .venue { color: var(--muted); font-size: 0.95rem; }
.legend { color: var(--muted); font-size: 0.9rem; }

/* About: serious vs. playful */
.pro {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-weight: 600;
  font-size: 1.05em;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 6px;
  letter-spacing: -0.02em;
}
.amateur {
  font-family: "Archivo", "Helvetica Neue", Arial, sans-serif;
  font-stretch: 125%;
  font-weight: 800;
  font-size: 0.98em;
  letter-spacing: 0.04em;
  color: var(--text);
}