/* ==========================================================================
   BUILT Lab — shared stylesheet
   Clean, editorial academic-lab style: generous whitespace, serif display
   type over a plain sans body, thin rules, soft tile cards, dated timeline.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Newsreader:ital,opsz,wght@0,6..72,400;0,6..72,500;0,6..72,600;1,6..72,400&family=Inter:wght@400;500;600;700&display=swap');

:root{
  --ink:        #17171a;
  --ink-soft:   #4a4a52;
  --ink-faint:  #83838c;
  --paper:      #ffffff;
  --paper-tint: #f7f6f3;
  --line:       #e6e4de;
  --accent:     #9a3324;   /* brick red — construction / EIU nod */
  --accent-soft:#f4e6e1;
  --tile:       #fbfaf7;
  --radius:     10px;
  --maxw:       1080px;
  --serif: 'Newsreader', 'Iowan Old Style', Georgia, serif;
  --sans:  'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  font-family:var(--sans);
  color:var(--ink);
  background:var(--paper);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
.container{ max-width:var(--maxw); margin:0 auto; padding:0 28px; }

h1,h2,h3,h4{
  font-family:var(--serif);
  font-weight:500;
  letter-spacing:-0.01em;
  margin:0 0 .5em;
  color:var(--ink);
}
p{ margin:0 0 1em; color:var(--ink-soft); }

.eyebrow{
  font-family:var(--sans);
  font-size:.72rem;
  font-weight:600;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--accent);
  margin:0 0 .9em;
  display:block;
}

/* ---------- header / nav ---------- */
header.site{
  position:sticky; top:0; z-index:50;
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(8px);
  border-bottom:1px solid var(--line);
}
.nav-row{
  display:flex; align-items:center; justify-content:space-between;
  padding:16px 28px; max-width:var(--maxw); margin:0 auto;
}
.brand{ display:flex; align-items:center; gap:10px; font-family:var(--serif); font-size:1.15rem; font-weight:600; color:var(--ink); }
.brand .mark{
  width:34px; height:34px; border-radius:8px;
  background:var(--accent); color:#fff;
  display:flex; align-items:center; justify-content:center;
  font-family:var(--sans); font-weight:700; font-size:.85rem; letter-spacing:.02em;
}
nav.tabs{ display:flex; gap:2px; flex-wrap:wrap; }
nav.tabs a{
  font-size:.87rem; font-weight:500; color:var(--ink-soft);
  padding:8px 14px; border-radius:7px; transition:background .15s, color .15s;
}
nav.tabs a:hover{ background:var(--paper-tint); color:var(--ink); }
nav.tabs a.active{ color:var(--accent); font-weight:600; }
.nav-toggle{ display:none; }

/* ---------- hero ---------- */
.hero{ padding:88px 0 64px; text-align:center; }
.hero h1{ font-size:clamp(2.1rem,4.4vw,3.4rem); line-height:1.12; max-width:820px; margin:0 auto .5em; }
.hero .lede{ max-width:640px; margin:0 auto 2em; font-size:1.08rem; color:var(--ink-soft); }
.btn-row{ display:flex; gap:14px; justify-content:center; flex-wrap:wrap; margin-bottom:20px; }
.btn{
  display:inline-block; padding:11px 22px; border-radius:8px;
  font-size:.92rem; font-weight:600; border:1px solid transparent; transition:all .15s;
}
.btn.primary{ background:var(--ink); color:#fff; }
.btn.primary:hover{ background:var(--accent); }
.btn.ghost{ border-color:var(--line); color:var(--ink); }
.btn.ghost:hover{ border-color:var(--ink); }

.hero-figure{
  max-width:760px; margin:56px auto 0; border-radius:14px;
  overflow:hidden; border:1px solid var(--line); background:var(--paper-tint);
}
.hero-figure img{ width:100%; }

/* ---------- PI / profile block ---------- */
.profile{
  display:flex; gap:36px; align-items:center;
  max-width:760px; margin:64px auto 0; padding:32px;
  border:1px solid var(--line); border-radius:var(--radius); background:var(--tile);
}
.profile .photo{
  width:120px; height:120px; border-radius:50%; flex:none;
  background:linear-gradient(135deg,var(--accent),#c9683a);
  color:#fff; display:flex; align-items:center; justify-content:center;
  font-family:var(--serif); font-size:2rem; overflow:hidden;
}
.profile h3{ margin-bottom:.2em; font-size:1.3rem; }
.profile .role{ font-size:.85rem; color:var(--ink-faint); margin-bottom:.6em; }

/* ---------- section headings ---------- */
section{ padding:64px 0; }
section.tint{ background:var(--paper-tint); border-top:1px solid var(--line); border-bottom:1px solid var(--line); }
.section-head{ max-width:640px; margin:0 auto 40px; text-align:center; }
.section-head h2{ font-size:clamp(1.5rem,2.6vw,2rem); }
.section-head p{ color:var(--ink-faint); }

/* ---------- tile grid ---------- */
.grid{ display:grid; gap:20px; }
.grid.cols-2{ grid-template-columns:repeat(2,1fr); }
.grid.cols-3{ grid-template-columns:repeat(3,1fr); }
.grid.cols-4{ grid-template-columns:repeat(4,1fr); }

.tile{
  border:1px solid var(--line); border-radius:var(--radius);
  background:var(--tile); padding:26px; transition:transform .15s, box-shadow .15s, border-color .15s;
}
.tile:hover{ transform:translateY(-3px); box-shadow:0 10px 24px rgba(23,23,26,.06); border-color:#d8d5cc; }
.tile .tag{
  display:inline-block; font-size:.68rem; font-weight:700; letter-spacing:.06em;
  text-transform:uppercase; color:var(--accent); background:var(--accent-soft);
  padding:3px 9px; border-radius:5px; margin-bottom:12px;
}
.tile h3{ font-size:1.08rem; margin-bottom:.4em; }
.tile p{ font-size:.92rem; margin-bottom:.8em; }
.chips{ display:flex; flex-wrap:wrap; gap:6px; }
.chip{
  font-size:.72rem; color:var(--ink-soft); background:var(--paper);
  border:1px solid var(--line); padding:3px 9px; border-radius:999px;
}

.tile-num{
  font-family:var(--serif); font-size:1.6rem; color:var(--accent); display:block; margin-bottom:8px;
}

/* ---------- news / timeline ---------- */
.timeline{ max-width:760px; margin:0 auto; }
.t-item{
  display:grid; grid-template-columns:110px 1fr; gap:24px;
  padding:26px 0; border-top:1px solid var(--line);
}
.t-item:first-child{ border-top:none; }
.t-date{ font-size:.82rem; color:var(--ink-faint); font-weight:600; padding-top:2px; }
.t-item h3{ font-size:1.08rem; margin-bottom:.3em; }
.t-item p{ font-size:.93rem; margin-bottom:0; }
.t-tag{
  display:inline-block; font-size:.68rem; font-weight:700; text-transform:uppercase;
  letter-spacing:.05em; color:var(--accent); margin-bottom:6px;
}

/* ---------- publications list ---------- */
.pub-group{ max-width:820px; margin:0 auto 48px; }
.pub-group h3{ font-size:1.05rem; border-bottom:1px solid var(--line); padding-bottom:10px; margin-bottom:18px; }
.pub{ padding:16px 0; border-bottom:1px dashed var(--line); }
.pub:last-child{ border-bottom:none; }
.pub .yr{ font-size:.78rem; color:var(--ink-faint); font-weight:600; }
.pub .ttl{ font-family:var(--serif); font-size:1.05rem; margin:.2em 0 .3em; }
.pub .meta{ font-size:.85rem; color:var(--ink-faint); }
.pub .links a{ font-size:.82rem; color:var(--accent); font-weight:600; margin-right:14px; }
.pub .links a:hover{ text-decoration:underline; }
.status{
  display:inline-block; font-size:.68rem; font-weight:700; text-transform:uppercase;
  padding:2px 8px; border-radius:5px; background:var(--accent-soft); color:var(--accent); margin-left:8px;
}

/* ---------- team ---------- */
.person{ text-align:center; }
.person .photo{
  width:88px; height:88px; margin:0 auto 14px; border-radius:50%;
  background:var(--paper-tint); border:1px solid var(--line);
  display:flex; align-items:center; justify-content:center;
  font-family:var(--serif); font-size:1.5rem; color:var(--accent);
}
.person h3{ font-size:1rem; margin-bottom:.2em; }
.person .role{ font-size:.82rem; color:var(--ink-faint); margin-bottom:.5em; }
.person p{ font-size:.88rem; }

/* ---------- contact ---------- */
.contact-grid{ display:grid; grid-template-columns:1fr 1fr; gap:48px; max-width:900px; margin:0 auto; }
.info-row{ display:flex; gap:14px; margin-bottom:22px; }
.info-row .ic{
  width:38px; height:38px; border-radius:8px; background:var(--accent-soft); color:var(--accent);
  display:flex; align-items:center; justify-content:center; flex:none; font-size:1rem;
}
.info-row .lbl{ font-size:.75rem; text-transform:uppercase; letter-spacing:.06em; color:var(--ink-faint); font-weight:700; margin-bottom:2px; }
form.contact-form{ display:flex; flex-direction:column; gap:14px; }
form.contact-form input, form.contact-form textarea{
  font-family:var(--sans); font-size:.92rem; padding:12px 14px;
  border:1px solid var(--line); border-radius:8px; background:var(--paper-tint); color:var(--ink);
}
form.contact-form textarea{ min-height:120px; resize:vertical; }
form.contact-form button{
  align-self:flex-start; cursor:pointer; font-family:var(--sans);
  background:var(--ink); color:#fff; border:none;
}

/* ---------- CTA / footer ---------- */
.cta{ text-align:center; padding:80px 0; }
.cta h2{ font-size:clamp(1.6rem,3vw,2.2rem); margin-bottom:.4em; }

footer.site{ border-top:1px solid var(--line); padding:34px 0; }
.foot-row{ display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:12px; }
.foot-row .brand{ font-size:.95rem; }
.foot-row .fine{ font-size:.8rem; color:var(--ink-faint); }

/* ---------- responsive ---------- */
@media (max-width:820px){
  .grid.cols-4{ grid-template-columns:repeat(2,1fr); }
  .grid.cols-3{ grid-template-columns:repeat(2,1fr); }
  .contact-grid{ grid-template-columns:1fr; }
}
@media (max-width:640px){
  .nav-row{ flex-wrap:wrap; }
  nav.tabs{ width:100%; justify-content:flex-start; overflow-x:auto; padding-top:8px; }
  .grid.cols-2, .grid.cols-3, .grid.cols-4{ grid-template-columns:1fr; }
  .profile{ flex-direction:column; text-align:center; }
  .t-item{ grid-template-columns:1fr; gap:6px; }
  .contact-grid{ gap:32px; }
}