:root{
    --bg:#EEF1F0;
    --bg-alt:#E4E9E6;
    --card:#FCFDFC;
    --ink:#16232A;
    --ink-soft:#51625F;
    --trajectory:#35618C;
    --trajectory-soft:#B9CCDB;
    --warm:#D97B3F;
    --line:#C7D0CB;

    --font-display:'Space Grotesk', sans-serif;
    --font-body:'Source Serif 4', serif;
    --font-mono:'JetBrains Mono', monospace;

    --maxw:1080px;
  }

  *{ box-sizing:border-box; }
  html{ scroll-behavior:smooth; }
  body{
    margin:0;
    background:var(--bg);
    color:var(--ink);
    font-family:var(--font-body);
    line-height:1.6;
    font-size:17px;
  }
  h1,h2,h3,.display{
    font-family:var(--font-display);
    letter-spacing:-0.01em;
    margin:0;
  }
  .mono{ font-family:var(--font-mono); }
  a{ color:var(--trajectory); text-decoration:none; }
  a:hover{ text-decoration:underline; }
  a:focus-visible, button:focus-visible{ outline:2px solid var(--warm); outline-offset:3px; }

  .wrap{ max-width:var(--maxw); margin:0 auto; padding:0 28px; }

  /* ---------- NAV ---------- */
  nav{
    position:sticky; top:0; z-index:50;
    background:rgba(238,241,240,0.9);
    backdrop-filter:blur(6px);
    border-bottom:1px solid var(--line);
  }
  nav .wrap{ position:relative; display:flex; align-items:center; justify-content:space-between; height:64px; }
  .brand{ font-family:var(--font-display); font-weight:600; font-size:1.05rem; color:var(--ink); }
  .brand span{ color:var(--trajectory); }
  .navlinks{ display:flex; gap:24px; list-style:none; margin:0; padding:0; }
  .navlinks a{ color:var(--ink-soft); font-family:var(--font-display); font-size:0.9rem; font-weight:500; }
  .navlinks a:hover{ color:var(--trajectory); text-decoration:none; }
  .navlinks a.active{ color:var(--trajectory); }
  .nav-toggle{
    display:none; background:none; border:1px solid var(--line); border-radius:4px;
    color:var(--ink); padding:8px; cursor:pointer; line-height:0;
  }

  /* ---------- HERO ---------- */
  header.hero{ padding:88px 0 64px; position:relative; overflow:hidden; }
  .eyebrow{
    font-family:var(--font-mono); font-size:0.78rem; letter-spacing:0.12em;
    text-transform:uppercase; color:var(--trajectory); margin-bottom:18px; display:block;
  }
  .hero-grid{ display:grid; grid-template-columns:1.1fr 0.9fr; gap:40px; align-items:center; }
  .hero h1{ font-size:2.7rem; font-weight:600; line-height:1.12; color:var(--ink); }
  .hero h1 em{ font-style:normal; color:var(--trajectory); }
  .hero p.lede{
    font-family:var(--font-body); font-size:1.15rem; color:var(--ink-soft);
    max-width:46ch; margin-top:20px;
  }
  .cta-row{ margin-top:32px; display:flex; gap:14px; flex-wrap:wrap; }
  .btn{
    font-family:var(--font-display); font-weight:600; font-size:0.92rem;
    padding:12px 22px; border-radius:3px; display:inline-block; border:1px solid transparent;
  }
  .btn-primary{ background:var(--ink); color:var(--bg); }
  .btn-primary:hover{ background:var(--trajectory); text-decoration:none; }
  .btn-ghost{ border-color:var(--ink); color:var(--ink); }
  .btn-ghost:hover{ background:var(--ink); color:var(--bg); text-decoration:none; }
  .btn-warm{ background:var(--warm); color:var(--ink); }
  .btn-warm:hover{ background:#c76a2e; color:var(--bg); text-decoration:none; }

  /* movement-amount chart */
  .activity-wrap{ display:flex; flex-direction:column; align-items:center; gap:14px; width:100%; max-width:340px; }
  .traj-caption{
    font-family:var(--font-mono); font-size:0.78rem; color:var(--ink-soft);
    text-align:center; max-width:300px; line-height:1.5;
  }

  /* ---------- SECTION SHELL ---------- */
  section{ padding:72px 0; border-top:1px solid var(--line); }
  section.alt{ background:var(--bg-alt); }
  .section-head{ margin-bottom:40px; }
  .section-head .eyebrow{ margin-bottom:10px; }
  .section-head h2{ font-size:1.9rem; font-weight:600; }
  .section-head p{ color:var(--ink-soft); max-width:60ch; margin-top:12px; }
  #research .section-head{ margin-bottom:16px; }
  #research .section-head p{ margin-bottom:0; }
  #outreach .section-head, #conference .section-head{ margin-bottom:16px; }

  /* ---------- RESEARCH CARDS ---------- */
  .research-lead{
    font-family:var(--font-body); color:var(--ink-soft); font-size:1.02rem;
    max-width:70ch; margin-bottom:0; line-height:1.65;
  }
  .research-lead strong{ color:var(--ink); }
  .naturalistic-block{
    display:grid; grid-template-columns:1.1fr 1fr; gap:36px; align-items:start;
    margin-bottom:36px;
  }
  .naturalistic-copy .section-head{ margin-bottom:16px; }
  .naturalistic-figure{
    width:100%; height:auto; border:1px solid var(--line); border-radius:6px;
    background:var(--card);
  }
  @media (max-width:820px){
    .naturalistic-block{ grid-template-columns:1fr; }
  }
  .research-subhead{
    font-family:var(--font-mono); font-size:0.78rem; text-transform:uppercase; letter-spacing:0.1em;
    color:var(--trajectory); margin:0 0 16px; font-weight:500;
  }
  .research-subhead:not(:first-of-type){ margin-top:44px; }
  .research-grid{ display:grid; grid-template-columns:repeat(auto-fit, minmax(240px, 1fr)); gap:22px; }
  .rcard{
    background:var(--card); border:1px solid var(--line); border-radius:4px;
    padding:26px 24px; display:flex; flex-direction:column; gap:14px;
  }
  .rcard .dotpath{ color:var(--trajectory); }
  .rcard h3{ font-size:1.15rem; font-weight:600; }
  .rcard p{ color:var(--ink-soft); font-size:0.98rem; margin:0; }

  .measure-tags{ display:flex; flex-wrap:wrap; gap:10px; }
  .measure-tag{
    font-family:var(--font-display); font-weight:600; font-size:0.9rem; color:var(--ink);
    background:var(--card); border:1px solid var(--line); border-radius:20px; padding:8px 18px;
  }

  /* ---------- RECRUITMENT (STUDIES) ---------- */
  .study-banner{
    display:flex; align-items:center; gap:10px; margin-bottom:34px;
    font-family:var(--font-mono); font-size:0.85rem; color:var(--warm);
  }
  .study-banner .pulse{
    width:9px; height:9px; border-radius:50%; background:var(--warm);
    animation:pulse 1.8s ease-in-out infinite;
  }
  @keyframes pulse{ 0%,100%{ opacity:1; } 50%{ opacity:0.3; } }
  @media (prefers-reduced-motion:reduce){ .study-banner .pulse{ animation:none; } }

  .study-card{
    background:var(--card); border:1px solid var(--line); border-left:4px solid var(--warm);
    border-radius:4px; padding:30px 28px; margin-bottom:20px;
    display:grid; grid-template-columns:1fr auto; gap:24px; align-items:center;
  }
  .study-card h3{ font-size:1.2rem; font-weight:600; margin-bottom:8px; }
  .study-card .status{
    font-family:var(--font-mono); font-size:0.72rem; text-transform:uppercase;
    letter-spacing:0.08em; color:var(--warm); border:1px solid var(--warm);
    border-radius:20px; padding:3px 10px; display:inline-block; margin-bottom:10px;
  }
  .study-card p{ color:var(--ink-soft); margin:0; font-size:0.98rem; }
  .study-details{
    display:flex; gap:22px; margin-top:14px; flex-wrap:wrap;
  }
  .study-details div{ font-size:0.88rem; color:var(--ink-soft); }
  .study-details strong{
    display:block; font-family:var(--font-mono); font-size:0.72rem;
    text-transform:uppercase; letter-spacing:0.06em; color:var(--ink); margin-bottom:2px;
  }
  @media (max-width:700px){
    .study-card{ grid-template-columns:1fr; }
  }

  /* ---------- OUTREACH ---------- */
  .outreach-grid{ display:grid; grid-template-columns:1.4fr 1fr; gap:40px; align-items:start; }
  .grid-intro{ color:var(--ink-soft); max-width:60ch; margin:0 0 28px; }
  .outreach-list{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:20px; }
  .outreach-list li{ display:flex; gap:12px; align-items:flex-start; }
  .outreach-list .dot{
    width:8px; height:8px; border-radius:50%; background:var(--trajectory);
    margin-top:8px; flex-shrink:0;
  }
  .outreach-list strong{ font-family:var(--font-display); font-size:1rem; display:block; }
  .outreach-list span{ color:var(--ink-soft); font-size:0.94rem; }
  .outreach-stats{
    display:flex; flex-direction:column; gap:18px;
    background:var(--card); border:1px solid var(--line); border-radius:6px; padding:28px;
  }
  .outreach-stats .stat{ text-align:center; }
  .outreach-stats .stat:not(:last-child){ padding-bottom:18px; border-bottom:1px solid var(--line); }
  .outreach-stats .stat-num{
    display:block; font-family:var(--font-display); font-weight:700; font-size:1.6rem; color:var(--trajectory);
  }
  .outreach-photo{
    width:100%; height:200px; border-radius:6px; margin:0 0 20px; display:block; object-fit:cover;
  }
  .outreach-slideshow{
    position:relative; width:100%; height:200px; border-radius:6px; margin:0 0 20px;
    overflow:hidden; background:var(--card);
  }
  .outreach-slideshow .slide{
    position:absolute; inset:0; width:100%; height:100%; object-fit:cover;
    opacity:0; transition:opacity 1.4s ease;
  }
  .outreach-slideshow .slide.is-active{ opacity:1; }
  @media (prefers-reduced-motion:reduce){
    .outreach-slideshow .slide{ transition:none; }
  }
  .outreach-stats .stat-label{
    display:block; font-family:var(--font-mono); font-size:0.78rem; color:var(--ink-soft);
    text-transform:uppercase; letter-spacing:0.05em; margin-top:4px;
  }
  @media (max-width:820px){
    .outreach-grid{ grid-template-columns:1fr; }
  }

  .conference-timeline{
    background:var(--card); border:1px solid var(--line); border-radius:6px; padding:24px 28px;
    display:flex; flex-direction:column; gap:0;
  }
  .tl-item{
    display:flex; justify-content:space-between; align-items:baseline; gap:12px;
    padding:12px 0; border-bottom:1px solid var(--line);
  }
  .tl-item:last-child{ border-bottom:none; }
  .tl-year{ font-family:var(--font-mono); font-weight:700; color:var(--trajectory); font-size:0.95rem; }
  .tl-host{ font-family:var(--font-display); font-size:0.9rem; color:var(--ink); text-align:right; }
  .tl-host em{ font-style:normal; color:var(--ink-soft); font-size:0.82rem; }

  /* ---------- PUBLICATIONS (faculty-grouped, APA style) ---------- */
  .pub-faculty-nav{
    display:flex; gap:10px; flex-wrap:wrap; margin-bottom:36px;
  }
  .pub-faculty-nav button{
    font-family:var(--font-display); font-size:0.88rem; font-weight:600;
    padding:8px 18px; border-radius:20px; border:1px solid var(--line);
    background:var(--card); color:var(--ink-soft); cursor:pointer;
  }
  .pub-faculty-nav button.active{
    background:var(--ink); color:var(--bg); border-color:var(--ink);
  }
  .pub-group{ margin-bottom:44px; }
  .pub-group h3{
    font-family:var(--font-display); font-size:1.25rem; font-weight:600;
    margin-bottom:16px; padding-bottom:10px; border-bottom:2px solid var(--ink);
  }
  .pub-list{ list-style:none; margin:0; padding:0; }
  .pub-item{
    font-family:var(--font-body); font-size:0.98rem; line-height:1.7; color:var(--ink-soft);
    padding:10px 0 10px 22px; position:relative;
  }
  .pub-item::before{
    content:"•"; position:absolute; left:0; color:var(--trajectory); font-weight:700;
  }
  .pub-item strong{ color:var(--ink); font-weight:700; }
  .pub-item a{ color:var(--trajectory); }
  .pub-item .pdf-link{
    font-family:var(--font-mono); font-size:0.78rem; font-weight:700;
    color:var(--warm); border:1px solid var(--warm); border-radius:3px;
    padding:1px 6px; margin-left:4px; white-space:nowrap; text-decoration:none;
  }
  .pub-item .pdf-link:hover{ background:var(--warm); color:#fff; text-decoration:none; }

  /* ---------- PEOPLE (sidebar categories) ---------- */
  .people-layout{ display:grid; grid-template-columns:220px 1fr; gap:40px; align-items:start; }
  .people-nav{ display:flex; flex-direction:column; gap:4px; position:sticky; top:80px; }
  .people-nav button{
    text-align:left; font-family:var(--font-display); font-weight:600; font-size:0.95rem;
    padding:10px 14px; border-radius:4px; border:none; background:transparent;
    color:var(--ink-soft); cursor:pointer; border-left:3px solid transparent;
  }
  .people-nav button.active{
    background:var(--card); color:var(--ink); border-left-color:var(--trajectory);
  }
  .people-nav button .count{
    font-family:var(--font-mono); font-size:0.78rem; color:var(--ink-soft); margin-left:6px;
  }
  .people-empty{ color:var(--ink-soft); font-style:italic; padding:10px 0; }

  .alumni-flow{ display:flex; flex-wrap:wrap; gap:10px 0; }
  .alumni-flow span{
    font-family:var(--font-mono); font-size:0.88rem; color:var(--ink-soft);
    padding:0 14px; border-right:1px solid var(--line);
  }
  .alumni-flow span:last-child{ border-right:none; }
  .alumni-year-block{ margin-bottom:24px; }
  .alumni-year-block h3{
    font-family:var(--font-mono); font-size:0.85rem; color:var(--trajectory);
    letter-spacing:0.06em; margin-bottom:10px; padding-bottom:6px; border-bottom:1px solid var(--line);
  }

  .person-grid{ display:grid; grid-template-columns:repeat(auto-fill,minmax(220px,1fr)); gap:22px; }
  .pcard{
    background:var(--card); border:1px solid var(--line); border-radius:4px; padding:20px;
  }
  .pcard .photo{
    width:88px; height:88px; border-radius:50%; object-fit:cover;
    background:var(--bg-alt); border:1px solid var(--line); margin-bottom:14px;
  }
  .pcard .role{ font-family:var(--font-mono); font-size:0.76rem; color:var(--warm); text-transform:uppercase; letter-spacing:0.06em; }
  .pcard h4{ font-family:var(--font-display); font-size:1.08rem; margin:6px 0 4px; }
  .pcard p{ margin:0; color:var(--ink-soft); font-size:0.9rem; }

  @media (max-width:820px){
    .people-layout{ grid-template-columns:1fr; }
    .people-nav{ position:static; flex-direction:row; flex-wrap:wrap; }
  }

  /* ---------- STUDENT PRESENTATIONS (event galleries) ---------- */
  .event-block{ margin-bottom:44px; }
  .event-block:last-child{ margin-bottom:0; }
  .event-block h3{
    font-family:var(--font-display); font-size:1.15rem; font-weight:600; color:var(--ink);
    margin-bottom:14px; padding-bottom:8px; border-bottom:2px solid var(--trajectory);
  }
  .event-photo-grid{
    display:grid; grid-template-columns:repeat(auto-fill,minmax(180px,1fr)); gap:12px; margin-bottom:14px;
  }
  .event-photo-grid img{
    width:100%; height:150px; object-fit:cover; border-radius:4px;
    border:1px solid var(--line); background:var(--bg-alt); display:block;
  }
  .event-students{
    font-size:0.9rem; color:var(--ink-soft); line-height:1.6;
  }
  .event-students strong{ color:var(--ink); font-family:var(--font-display); }

  /* ---------- PHOTO STRIP (Lab in Action) ---------- */
  .photo-strip{ display:grid; grid-template-columns:repeat(3,1fr); gap:16px; margin-top:44px; }
  .photo-strip img{
    width:100%; height:220px; object-fit:cover; border-radius:4px;
    border:1px solid var(--line); background:var(--bg-alt);
  }
  @media (max-width:820px){ .photo-strip{ grid-template-columns:1fr; } }

  /* ---------- APP SHOWCASE ---------- */
  .app-section{
    display:grid; grid-template-columns:1fr 1fr; gap:48px; align-items:center;
  }
  .app-copy .status{
    font-family:var(--font-mono); font-size:0.72rem; text-transform:uppercase;
    letter-spacing:0.08em; color:var(--warm); border:1px solid var(--warm);
    border-radius:20px; padding:3px 12px; display:inline-block; margin-bottom:16px;
  }
  .app-copy h2{ font-size:1.9rem; font-weight:600; margin-bottom:14px; }
  .app-copy p{ color:var(--ink-soft); max-width:52ch; }
  .app-features{ list-style:none; margin:24px 0 0; padding:0; display:flex; flex-direction:column; gap:16px; }
  .app-features li{ display:flex; gap:12px; align-items:flex-start; }
  .app-features .dot{
    width:8px; height:8px; border-radius:50%; background:var(--trajectory);
    margin-top:8px; flex-shrink:0;
  }
  .app-features strong{ font-family:var(--font-display); font-size:0.98rem; display:block; }
  .app-features span{ color:var(--ink-soft); font-size:0.92rem; }
  .app-signup{
    margin-top:28px; display:flex; gap:10px; flex-wrap:wrap;
  }
  .app-signup input[type="email"]{
    font-family:var(--font-body); font-size:0.95rem; padding:12px 16px;
    border:1px solid var(--line); border-radius:3px; background:var(--card);
    color:var(--ink); flex:1; min-width:220px;
  }
  .app-signup input[type="email"]:focus-visible{ outline:2px solid var(--warm); outline-offset:2px; }
  .app-note{ font-family:var(--font-mono); font-size:0.8rem; color:var(--ink-soft); margin-top:10px; }

  .app-visual{
    background:var(--card); border:1px solid var(--line); border-radius:8px;
    padding:28px; display:flex; flex-direction:column; gap:16px;
  }
  .app-visual .frame{
    aspect-ratio:9/14; background:var(--bg-alt); border-radius:14px; border:1px solid var(--line);
    display:flex; align-items:center; justify-content:center; overflow:hidden;
  }
  .app-visual .frame img{ width:100%; height:100%; object-fit:cover; }
  .app-visual .caption{ text-align:center; font-family:var(--font-mono); font-size:0.8rem; color:var(--ink-soft); }
  @media (max-width:820px){
    .app-section{ grid-template-columns:1fr; }
    .app-visual{ order:-1; max-width:280px; margin:0 auto; }
  }
  .join-box{
    background:var(--ink); color:var(--bg); border-radius:6px; padding:48px 40px;
    display:flex; justify-content:space-between; align-items:center; gap:24px; flex-wrap:wrap;
  }
  .join-box h2{ color:var(--bg); font-size:1.7rem; max-width:22ch; }
  .join-box p{ color:var(--trajectory-soft); margin-top:10px; max-width:40ch; }
  .join-box .btn-primary{ background:var(--warm); color:var(--ink); }
  .join-box .btn-primary:hover{ background:#fff; }

  footer{ padding:32px 0; text-align:center; color:var(--ink-soft); font-family:var(--font-mono); font-size:0.85rem; }

  @media (max-width:820px){
    .hero-grid{ grid-template-columns:1fr; }
    .research-grid{ grid-template-columns:1fr; }
    .hero h1{ font-size:2.1rem; }

    .nav-toggle{ display:block; }
    .navlinks{
      display:none; flex-direction:column; gap:0;
      position:absolute; top:100%; left:0; right:0;
      background:var(--bg); border:1px solid var(--line); border-top:none;
      box-shadow:0 8px 16px rgba(0,0,0,0.08);
    }
    .navlinks.open{ display:flex; }
    .navlinks a{ padding:14px 28px; display:block; border-bottom:1px solid var(--line); }
    .navlinks li:last-child a{ border-bottom:none; }
  }