:root {
  color-scheme: light dark;
    --paper: #F7F8FB;
    --card: #FFFFFF;
    --ink: #14181F;
    --ink-2: #3B424F;
    --muted: #6C7484;
    --line: #E0E4EC;
    --line-strong: #C9CFDB;
    --indigo: #2A4A8F;
    --indigo-bright: #345CB0;
    --ochre: #B77A2B;
    --serif: ui-serif, "New York", "Iowan Old Style", Palatino, Georgia, serif;
    --sans: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
    --wrap: 940px;
  }

  * { box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  section[id] { scroll-margin-top: 28px; }

  body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--sans);
    font-size: 17px;
    line-height: 1.62;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
  }

  a { color: var(--indigo); text-decoration: none; }
  a:hover { color: var(--indigo-bright); }
  a:focus-visible { outline: 2px solid var(--indigo-bright); outline-offset: 3px; border-radius: 2px; }

  .wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 32px; }

  .eyebrow {
    font-family: var(--mono);
    font-size: 0.72rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--muted);
    margin: 0;
  }

  .rule { display: flex; align-items: center; gap: 0; margin: 0; height: 1px; }
  .rule::before {
    content: "";
    width: 44px; height: 2px;
    background: var(--ochre);
    transform: skewX(-32deg);
    transform-origin: left center;
    flex: none;
  }
  .rule::after {
    content: "";
    flex: 1; height: 1px;
    background: var(--line-strong);
  }

  section { padding: 60px 0; }
  section > .wrap > .eyebrow { margin-bottom: 26px; }

  h2.sec {
    font-family: var(--serif);
    font-weight: 600;
    font-size: 1.5rem;
    letter-spacing: -0.01em;
    margin: 14px 0 28px;
    text-wrap: balance;
  }

  /* =================== HERO =================== */
  .hero { padding: 74px 0 40px; }
  .hero-inner { max-width: 680px; }
  .name {
    font-family: var(--serif);
    font-weight: 600;
    font-size: clamp(2.7rem, 6vw, 3.7rem);
    line-height: 1.02;
    letter-spacing: -0.025em;
    margin: 14px 0 0;
    text-wrap: balance;
  }
  .thesis {
    font-size: 1.2rem;
    line-height: 1.52;
    color: var(--ink-2);
    max-width: 42ch;
    margin: 22px 0 0;
  }
  .thesis b { color: var(--ink); font-weight: 600; }

  .idrow {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 22px;
    margin: 30px 0 0;
    font-family: var(--mono);
    font-size: 0.8rem;
    letter-spacing: 0.01em;
  }
  .idrow a { color: var(--ink-2); display: inline-flex; align-items: center; gap: 7px; }
  .idrow a:hover { color: var(--indigo); }
  .ic { width: 15px; height: 15px; flex: none; }

  /* =================== ABOUT =================== */
  .about-grid { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 40px; align-items: start; }
  .portrait { margin: 0; }
  .portrait img, .portrait svg {
    width: 100%; aspect-ratio: 4 / 5; object-fit: cover; object-position: 50% 24%; display: block;
    border: 1px solid var(--line); border-radius: 3px; background: var(--card);
    box-shadow: 0 1px 0 rgba(20,24,31,0.03), 0 16px 34px -26px rgba(20,24,31,0.30);
  }
  .lede { font-size: 1.06rem; color: var(--ink-2); }
  .lede p { margin: 0 0 16px; }
  .lede p:last-child { margin-bottom: 0; }
  .lede b { color: var(--ink); font-weight: 600; }

  /* =================== PUBLICATIONS =================== */
  .reflist { display: flex; flex-direction: column; gap: 26px; max-width: 74ch; }
  .sublabel { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.15em; text-transform: uppercase; color: var(--muted); margin: 4px 0 -8px; }
  .ref { display: flex; flex-direction: column; gap: 5px; }
  .ref .title { font-weight: 600; color: var(--ink); line-height: 1.4; }
  .ref .authors { color: var(--ink-2); font-size: 0.95rem; }
  .ref .authors b { color: var(--ink); }
  .ref .venue {
    font-family: var(--mono);
    font-size: 0.76rem;
    color: var(--muted);
    display: flex;
    flex-wrap: wrap;
    gap: 6px 12px;
    align-items: baseline;
    margin-top: 3px;
  }
  .ref .venue a { color: var(--indigo); }
  .tag-venue { color: var(--indigo); border: 1px solid var(--line-strong); border-radius: 2px; padding: 1px 6px; }

  /* =================== PROJECTS =================== */
  .projects { display: flex; flex-direction: column; gap: 0; }
  .proj {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 6px 28px;
    padding: 26px 0;
    border-top: 1px solid var(--line);
    align-items: baseline;
  }
  .proj:first-child { border-top: none; }
  .proj.feature { padding-top: 4px; }
  .proj h3 {
    font-family: var(--serif);
    font-size: 1.24rem;
    font-weight: 600;
    margin: 0;
    letter-spacing: -0.01em;
  }
  .proj h3 .kicker {
    font-family: var(--mono);
    font-size: 0.64rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--ochre);
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
  }
  .proj p { margin: 8px 0 0; color: var(--ink-2); max-width: 60ch; grid-column: 1 / -1; font-size: 1.02rem; }
  .proj .tech {
    grid-column: 1 / -1;
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
    margin-top: 14px;
    font-family: var(--mono);
    font-size: 0.7rem;
    letter-spacing: 0.02em;
  }
  .proj .tech span {
    color: var(--ink-2);
    border: 1px solid var(--line);
    background: var(--card);
    border-radius: 2px;
    padding: 3px 8px;
  }
  .proj .links {
    display: flex;
    gap: 16px;
    font-family: var(--mono);
    font-size: 0.76rem;
    white-space: nowrap;
  }

  /* =================== EXPERIENCE / EDUCATION =================== */
  .rows { display: flex; flex-direction: column; gap: 2px; max-width: 74ch; }
  .row {
    display: grid;
    grid-template-columns: 118px 1fr;
    gap: 24px;
    padding: 18px 0;
    border-top: 1px solid var(--line);
  }
  .row:first-child { border-top: none; }
  .row .when {
    font-family: var(--mono);
    font-size: 0.76rem;
    color: var(--muted);
    font-variant-numeric: tabular-nums;
    padding-top: 2px;
  }
  .row .what strong { font-weight: 600; }
  .row .what .org { color: var(--indigo); }
  .row .what .note { display: block; color: var(--ink-2); font-size: 0.97rem; margin-top: 3px; }

  /* =================== CONTACT =================== */
  .contact { padding-bottom: 34px; }
  .contact .big {
    font-family: var(--serif);
    font-size: clamp(1.5rem, 4vw, 2.1rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    margin: 12px 0 0;
    text-wrap: balance;
  }
  .contact .big a { color: var(--indigo); }
  .contact .links {
    display: flex; flex-wrap: wrap; gap: 10px 26px;
    margin-top: 26px;
    font-family: var(--mono);
    font-size: 0.82rem;
  }
  .contact .links a { color: var(--ink-2); display: inline-flex; align-items: center; gap: 8px; }
  .contact .links a:hover { color: var(--indigo); }
  .contact .links .ic { width: 16px; height: 16px; }

  footer {
    border-top: 1px solid var(--line);
    padding: 24px 0 40px;
    font-family: var(--mono);
    font-size: 0.72rem;
    color: var(--muted);
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
  }

  @media (max-width: 760px) {
    body { font-size: 16px; }
    .about-grid { grid-template-columns: 130px 1fr; gap: 22px; }
    .thesis { max-width: none; }
    .proj { grid-template-columns: 1fr; }
    .proj .links { margin-top: 4px; }
    .row { grid-template-columns: 1fr; gap: 4px; }
  }

  @media (max-width: 560px) {
    .about-grid { grid-template-columns: 1fr; gap: 20px; }
    .portrait { max-width: 168px; }
  }

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

  /* language switcher */
  .langbar { display: flex; justify-content: flex-end; gap: 16px; padding-top: 18px; font-family: var(--mono); font-size: 0.75rem; letter-spacing: 0.04em; }
  .langbar a { color: var(--muted); }
  .langbar a:hover { color: var(--indigo); }
  .langbar a[aria-current="true"] { color: var(--ink); font-weight: 600; }

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #12161D;
    --card: #1A1F29;
    --ink: #EAECEF;
    --ink-2: #B7BEC9;
    --muted: #7E8696;
    --line: #262C37;
    --line-strong: #39414D;
    --indigo: #82A6E4;
    --indigo-bright: #A6C2F1;
    --ochre: #D69A54;
  }
}
:root[data-theme="dark"] {
    --paper: #12161D;
    --card: #1A1F29;
    --ink: #EAECEF;
    --ink-2: #B7BEC9;
    --muted: #7E8696;
    --line: #262C37;
    --line-strong: #39414D;
    --indigo: #82A6E4;
    --indigo-bright: #A6C2F1;
    --ochre: #D69A54;
}


  .themebtn { background: none; border: none; padding: 0; cursor: pointer; color: var(--muted); display: inline-flex; align-items: center; }
  .themebtn:hover { color: var(--indigo); }
  .themebtn svg { display: block; }
  .themebtn .sun { display: none; }
  .themebtn .moon { display: inline-flex; }
  @media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .themebtn .sun { display: inline-flex; }
    :root:not([data-theme="light"]) .themebtn .moon { display: none; }
  }
  :root[data-theme="dark"] .themebtn .sun { display: inline-flex; }
  :root[data-theme="dark"] .themebtn .moon { display: none; }

  .chips-row { display: flex; flex-wrap: wrap; gap: 8px; font-family: var(--mono); font-size: 0.78rem; }
  .chips-row span { color: var(--ink-2); border: 1px solid var(--line); background: var(--card); border-radius: 2px; padding: 4px 10px; }
  .langs { font-size: 0.95rem; color: var(--muted); margin: 20px 0 0; }
  .langs b { color: var(--ink-2); font-weight: 600; }