/* Tam³ — research outlay site tokens */
:root {
  --bg:        #f4f1ea;
  --bg-elev:   #fbf9f3;
  --bg-deep:   #ebe6d7;
  --ink:       #2a261d;
  --ink-2:     #54493b;
  --muted:     #8d8674;
  --line:      #cfc7b4;
  --line-soft: #e2dcc9;
  --accent:    #b8552d;
  --accent-soft:#ead5c2;
  --sage:      #6e7d5a;
  --sage-soft: #d3d8c4;

  --serif: 'Newsreader', 'Source Serif 4', Georgia, serif;
  --sans:  'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --mono:  'IBM Plex Mono', ui-monospace, monospace;
}

* { box-sizing: border-box; }
html, body { background: var(--bg); }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  font-size: 14px;
  line-height: 1.55;
  letter-spacing: -0.005em;
}

.tam h1, .tam h2, .tam h3, .tam h4 { font-family: var(--serif); font-weight: 500; letter-spacing: -0.015em; color: var(--ink); margin: 0; line-height: 1.1; }
.tam h1 { font-size: 56px; }
.tam h2 { font-size: 36px; }
.tam h3 { font-size: 22px; font-weight: 500; }
.tam h4 { font-size: 16px; font-weight: 500; font-family: var(--sans); letter-spacing: -0.005em; }
.tam p { margin: 0; color: var(--ink-2); }

.tam .mono { font-family: var(--mono); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); }
.tam .mono-sm { font-family: var(--mono); font-size: 10px; letter-spacing: 0.04em; color: var(--muted); }
.tam .num { font-family: var(--mono); font-size: 12px; color: var(--accent); letter-spacing: 0.04em; }

.tam .rule { height: 1px; background: var(--line); border: 0; }
.tam .rule-soft { height: 1px; background: var(--line-soft); border: 0; }

.tam .pill { display: inline-flex; align-items: center; gap: 6px; padding: 4px 10px; border: 1px solid var(--line); border-radius: 999px; font-family: var(--mono); font-size: 10px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-2); background: var(--bg-elev); }
.tam .pill .dot { width: 6px; height: 6px; border-radius: 999px; background: var(--accent); }
.tam .pill.sage .dot { background: var(--sage); }
.tam .pill.muted .dot { background: var(--muted); }

.tam .btn-link { font-family: var(--mono); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink); text-decoration: none; border-bottom: 1px solid var(--ink); padding-bottom: 2px; }

.tam .nav-row { position: sticky; top: 0; z-index: 10; background: var(--bg); display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 18px; padding: 22px 56px; border-bottom: 1px solid var(--line); }
.tam .nav-row .brand { font-family: var(--serif); font-size: 22px; font-weight: 500; letter-spacing: -0.015em; }
.tam .nav-row .brand sup { font-family: var(--mono); font-size: 11px; vertical-align: super; color: var(--accent); margin-left: 2px; }
.tam .nav-row nav { display: flex; gap: 28px; font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-2); }
.tam .nav-row nav a { color: inherit; text-decoration: none; padding-bottom: 4px; }
.tam .nav-row nav a.is-active { color: var(--ink); border-bottom: 1px solid var(--accent); }
.tam .nav-row nav a:hover { color: var(--ink); }
.tam .nav-row .meta { display: flex; gap: 14px; align-items: center; font-family: var(--mono); font-size: 10px; color: var(--muted); }

.tam .footer-row { padding: 36px 56px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; align-items: flex-end; }
.tam .footer-row .brand { font-family: var(--serif); font-size: 18px; font-weight: 500; letter-spacing: -0.015em; }
.tam .footer-row .brand sup { font-family: var(--mono); font-size: 10px; vertical-align: super; color: var(--accent); margin-left: 2px; }

.placeholder-img {
  background:
    repeating-linear-gradient(135deg, var(--line-soft) 0 1px, transparent 1px 10px),
    var(--bg-elev);
  border: 1px solid var(--line);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.06em;
  color: var(--muted); text-transform: uppercase;
}

.card { border: 1px solid var(--line); background: var(--bg-elev); }

.tam-page { width: 100%; max-width: 1280px; margin: 0 auto; }

.hero {
  padding: 64px 56px 56px;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 80px;
  border-bottom: 1px solid var(--line);
}
.hero-h1 { font-size: 64px; line-height: 1.02; margin-top: 18px; }
.hero-h1 em { color: var(--accent); font-style: italic; }
.hero-lead { font-size: 17px; line-height: 1.55; }
.pill-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }

.sec { padding: 64px 56px; }
.sec-bordered { border-top: 1px solid var(--line); padding: 56px; }
.sec-head { display: flex; justify-content: space-between; align-items: baseline; gap: 24px; margin-bottom: 28px; }
.sec-head-blurb { max-width: 280px; }

.study-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.study-card { padding: 24px; display: flex; flex-direction: column; }
.study-figure { margin-top: 18px; height: 180px; border: 1px solid var(--line-soft); background: var(--bg); display: flex; align-items: center; justify-content: center; overflow: hidden; }
.study-figure svg { max-width: 100%; height: auto; }
.study-meta { margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--line-soft); display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.method-list { margin: 14px 0 0; padding: 0; list-style: none; }
.method-list li { font-size: 12px; color: var(--ink-2); padding: 6px 0; border-top: 1px solid var(--line-soft); }

.profile-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.profile-card { padding: 20px; }
.profile-card .portrait { width: 100%; aspect-ratio: 1 / 1; margin-bottom: 16px; display: block; object-fit: cover; border: 1px solid var(--line); background: var(--bg-elev); }
.profile-card .name { font-family: var(--serif); font-size: 20px; }
.profile-card .role { margin-top: 4px; }
.profile-card .affil { color: var(--ink-2); margin-top: 6px; font-size: 12px; }
.profile-card .bio { color: var(--ink-2); margin-top: 12px; font-size: 13px; line-height: 1.5; }
.profile-card .scholar-link { display: inline-block; margin-top: 14px; color: var(--accent); text-decoration: none; border-bottom: 1px solid var(--accent-soft); padding-bottom: 2px; }
.profile-card .scholar-link:hover { border-bottom-color: var(--accent); }

.output-row {
  display: grid;
  grid-template-columns: 60px 1fr 200px 110px;
  gap: 20px;
  padding: 18px 0;
  border-top: 1px solid var(--line-soft);
  align-items: baseline;
}
.output-row .title { font-family: var(--serif); font-size: 17px; color: var(--ink); text-decoration: none; display: inline; }
a.title:hover { border-bottom: 1px solid var(--accent); }
.output-row .authors { margin-top: 4px; }

.contact-row { display: grid; grid-template-columns: 1.2fr 1fr; gap: 60px; }
.contact-row .email { font-family: var(--serif); font-size: 22px; margin-top: 6px; }

/* ── Tablet (≤ 960px) ─────────────────────────────────────────────── */
@media (max-width: 960px) {
  .tam .nav-row { padding: 18px 32px; flex-wrap: wrap; gap: 14px; row-gap: 10px; }
  .tam .nav-row nav { display: none; }
  .tam .nav-row .meta { font-size: 9px; }

  .hero { padding: 48px 32px 40px; grid-template-columns: 1fr; gap: 32px; }
  .hero-h1 { font-size: 44px; }
  .hero-lead { font-size: 16px; }

  .sec { padding: 48px 32px; }
  .sec-bordered { padding: 48px 32px; }
  .sec-head { flex-direction: column; align-items: flex-start; }
  .sec-head-blurb { max-width: 100%; }

  .study-grid { grid-template-columns: 1fr 1fr; gap: 20px; }
  .profile-grid { grid-template-columns: repeat(2, 1fr); gap: 18px; }

  .tam .footer-row { padding: 28px 32px; flex-direction: column; align-items: flex-start; gap: 18px; }

  .contact-row { grid-template-columns: 1fr; gap: 28px; }
}

/* ── Mobile (≤ 640px) ────────────────────────────────────────────── */
@media (max-width: 640px) {
  .tam .nav-row { padding: 16px 20px; }
  .tam .nav-row .meta { display: none; }

  .hero { padding: 36px 20px 32px; }
  .hero-h1 { font-size: 34px; line-height: 1.05; }
  .tam h2 { font-size: 26px; }
  .tam h3 { font-size: 19px; }

  .sec { padding: 36px 20px; }
  .sec-bordered { padding: 36px 20px; }

  .study-grid { grid-template-columns: 1fr; gap: 16px; }
  .study-card { padding: 20px; }
  .study-figure { height: 160px; }

  .profile-grid { grid-template-columns: 1fr; gap: 14px; }

  .output-row { grid-template-columns: 1fr; gap: 6px; padding: 14px 0; }

  .tam .footer-row { padding: 24px 20px; }
}