/* =========================
   Tokens (light + dark)
   ========================= */
:root {
  --bg: #fbfaf7;
  --bg-alt: #f3f1ec;
  --surface: #ffffff;
  --text: #1a1a1a;
  --text-muted: #5b5b5b;
  --border: #e5e2da;
  --accent: #8b1a1a;        /* VT-ish maroon */
  --accent-2: #d97706;      /* warm amber */
  --link: #8b1a1a;
  --link-hover: #b1252b;
  --shadow: 0 1px 2px rgba(0,0,0,.04), 0 8px 24px rgba(0,0,0,.06);
  --radius: 14px;
  --radius-sm: 8px;
  --max-w: 1080px;
  --content-pad: clamp(20px, 4vw, 40px);
  --transition: 180ms cubic-bezier(.4,.0,.2,1);
}

[data-theme="dark"] {
  --bg: #0f1115;
  --bg-alt: #161922;
  --surface: #1a1e29;
  --text: #ececec;
  --text-muted: #a4a8b3;
  --border: #2a2f3c;
  --accent: #f59e0b;
  --accent-2: #fb7185;
  --link: #f59e0b;
  --link-hover: #fbbf24;
  --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.45);
}

/* =========================
   Base
   ========================= */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { margin: 0; padding: 0; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background var(--transition), color var(--transition);
}
img { max-width: 100%; display: block; }
a {
  color: var(--link);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--link-hover); text-decoration: underline; text-underline-offset: 3px; }
code { font-family: 'JetBrains Mono', ui-monospace, monospace; font-size: .9em; background: var(--bg-alt); padding: 2px 6px; border-radius: 4px; }

.container { max-width: var(--max-w); margin: 0 auto; padding: 0 var(--content-pad); }

.skip-link {
  position: absolute; left: -10000px; top: auto;
  background: var(--accent); color: #fff; padding: 8px 12px; border-radius: 6px;
}
.skip-link:focus { left: 16px; top: 16px; z-index: 9999; }

/* =========================
   Nav
   ========================= */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(160%) blur(10px);
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--max-w); margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px var(--content-pad);
  gap: 16px;
}
.nav-brand {
  font-weight: 700; letter-spacing: .04em;
  font-family: 'JetBrains Mono', monospace;
  border: 1.5px solid var(--text);
  padding: 4px 9px; border-radius: 8px;
  color: var(--text);
}
.nav-brand:hover { background: var(--text); color: var(--bg); text-decoration: none; }

.nav-links {
  list-style: none; display: flex; gap: 22px; margin: 0; padding: 0;
}
.nav-links a {
  color: var(--text-muted);
  font-weight: 500; font-size: .95rem;
}
.nav-links a:hover { color: var(--text); text-decoration: none; }

.theme-toggle {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  width: 38px; height: 38px;
  border-radius: 10px;
  display: inline-flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: all var(--transition);
}
.theme-toggle:hover { border-color: var(--text); }
.theme-toggle .icon-moon { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-moon { display: block; }

@media (max-width: 640px) {
  .nav-links { display: none; }
}

/* =========================
   Hero
   ========================= */
.hero { padding: clamp(60px, 9vw, 110px) 0 clamp(40px, 6vw, 80px); }
.hero-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: clamp(28px, 5vw, 64px);
  align-items: center;
}
@media (max-width: 800px) {
  .hero-grid { grid-template-columns: 1fr; }
}

.eyebrow {
  text-transform: uppercase; letter-spacing: .14em;
  font-size: .8rem; font-weight: 600;
  color: var(--accent);
  margin: 0 0 10px;
}
h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  line-height: 1.1; margin: 0 0 18px;
  letter-spacing: -0.02em;
  font-weight: 700;
}
.lede {
  font-size: clamp(1.05rem, 1.5vw, 1.2rem);
  color: var(--text-muted);
  margin: 0 0 14px;
}
.lede .hl { color: var(--text); font-weight: 600; }
.bio { color: var(--text-muted); max-width: 56ch; }

.cta-row { display: flex; gap: 12px; flex-wrap: wrap; margin: 22px 0 26px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 20px;
  border-radius: 10px;
  font-weight: 600; font-size: .95rem;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary {
  background: var(--accent); color: #fff;
}
.btn-primary:hover { background: var(--link-hover); color: #fff; }
.btn-ghost {
  background: transparent; color: var(--text);
  border-color: var(--border);
}
.btn-ghost:hover { border-color: var(--text); }

.socials {
  list-style: none; padding: 0; margin: 0;
  display: flex; gap: 14px;
}
.socials a {
  width: 38px; height: 38px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: all var(--transition);
}
.socials a:hover { color: var(--accent); border-color: var(--accent); transform: translateY(-2px); text-decoration: none; }

.hero-photo { display: flex; flex-direction: column; align-items: center; gap: 10px; }
.photo-frame {
  width: clamp(200px, 28vw, 280px);
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  overflow: hidden;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  box-shadow: var(--shadow);
  display: grid; place-items: center;
}
.photo-frame img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 10%; }
.photo-placeholder {
  font-family: 'JetBrains Mono', monospace;
  font-size: clamp(3rem, 6vw, 4.5rem);
  font-weight: 700;
  color: rgba(255,255,255,.92);
  letter-spacing: .04em;
}
.photo-caption { color: var(--text-muted); font-size: .9rem; margin: 0; }

/* =========================
   Sections
   ========================= */
.section { padding: clamp(60px, 8vw, 100px) 0; }
.section-alt { background: var(--bg-alt); }
.section-title {
  font-size: clamp(1.5rem, 2.8vw, 2rem);
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}
.section-title::after {
  content: ''; display: block;
  width: 36px; height: 3px;
  background: var(--accent);
  border-radius: 2px;
  margin-top: 10px;
}
.section-lead {
  color: var(--text-muted);
  margin: 0 0 32px;
  max-width: 60ch;
}

/* Cards */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
}
.card-tag {
  display: inline-block;
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 10px;
}
.card h3 { margin: 0 0 8px; font-size: 1.15rem; }
.card p { color: var(--text-muted); margin: 0 0 12px; font-size: .95rem; }
.card-link { font-weight: 600; font-size: .9rem; }

/* Publications */
.pub-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 4px; }
.pub {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
}
.pub:last-child { border-bottom: none; }
.pub-year {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 500;
  color: var(--text-muted);
  font-size: .92rem;
  padding-top: 2px;
}
.pub-title { margin: 0 0 4px; line-height: 1.45; }
.pub-authors { color: var(--text-muted); margin: 0 0 2px; font-size: .92rem; }
.pub-venue { color: var(--text-muted); margin: 0 0 8px; font-size: .92rem; }
.pub-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.pub-actions a {
  display: inline-block;
  font-size: .8rem;
  font-weight: 500;
  padding: 3px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-muted);
}
.pub-actions a:hover { color: var(--accent); border-color: var(--accent); text-decoration: none; }

/* Status badges on publications */
.status {
  display: inline-block;
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 999px;
  margin-left: 6px;
  vertical-align: middle;
}
.status-review {
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
}
.status-soon {
  background: color-mix(in srgb, var(--text-muted) 14%, transparent);
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.status-accepted,
.status-published {
  background: color-mix(in srgb, #16a34a 14%, transparent);
  color: #15803d;
  border: 1px solid color-mix(in srgb, #16a34a 40%, transparent);
}
[data-theme="dark"] .status-accepted,
[data-theme="dark"] .status-published {
  color: #4ade80;
  border-color: color-mix(in srgb, #4ade80 45%, transparent);
}

@media (max-width: 560px) {
  .pub { grid-template-columns: 1fr; gap: 6px; }
  .pub-year { padding-top: 0; }
}

/* CV / two-col */
.two-col {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: clamp(28px, 5vw, 60px);
}
@media (max-width: 800px) {
  .two-col { grid-template-columns: 1fr; }
}

.timeline-block { margin-bottom: 28px; }
.timeline-block h3 {
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--text-muted);
  margin: 0 0 12px;
  font-weight: 600;
}
.t-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
.t-list li {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 14px;
  padding: 8px 0;
  border-bottom: 1px dashed var(--border);
}
.t-list li:last-child { border-bottom: none; }
.t-when { font-family: 'JetBrains Mono', monospace; font-size: .85rem; color: var(--text-muted); }

@media (max-width: 540px) {
  .t-list li { grid-template-columns: 1fr; gap: 2px; }
}

/* News */
.news { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; height: max-content; }
.news .section-title { margin-top: 0; }
.news-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 12px; }
.news-list li { font-size: .95rem; color: var(--text-muted); padding-bottom: 12px; border-bottom: 1px solid var(--border); }
.news-list li:last-child { border-bottom: none; padding-bottom: 0; }
.news-list time { display: block; font-family: 'JetBrains Mono', monospace; font-size: .8rem; color: var(--accent); margin-bottom: 2px; }

/* Contact */
.contact { text-align: center; }
.contact .section-title::after { margin-left: auto; margin-right: auto; }
.contact .section-lead { margin-left: auto; margin-right: auto; }
.email-big {
  display: inline-block;
  font-size: clamp(1.3rem, 3.2vw, 1.9rem);
  font-weight: 600;
  margin: 12px 0 14px;
  border-bottom: 2px solid var(--accent);
  padding-bottom: 4px;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  background: var(--bg);
  padding: 28px 0;
  font-size: .9rem;
  color: var(--text-muted);
}
.footer-inner {
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px;
}

/* Helpers */
.muted { color: var(--text-muted); }
.small { font-size: .85rem; }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
  html { scroll-behavior: auto; }
}

/* Active nav link */
.nav-links a.is-active { color: var(--accent); }

/* Selection */
::selection { background: var(--accent); color: #fff; }