:root {
  --paper: #ffffff;
  --paper-alt: #f7f7f5;
  --ink: #1d252d;
  --muted: #5f6870;
  --navy: #18344f;
  --navy-soft: #e9eef2;
  --rule: #cfd4d8;
  --rule-dark: #9ba5ad;
  --max: 1180px;
  --serif: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Palatino, Georgia, "Times New Roman", serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--serif);
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; }
img { display: block; max-width: 100%; }
button, input { font: inherit; }

.container { width: min(calc(100% - 48px), var(--max)); margin-inline: auto; }
.narrow { width: min(calc(100% - 48px), 860px); margin-inline: auto; }

.skip-link {
  position: fixed;
  left: 16px;
  top: -60px;
  z-index: 100;
  background: var(--ink);
  color: #fff;
  padding: 9px 12px;
}
.skip-link:focus { top: 16px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(255,255,255,.97);
  border-bottom: 1px solid var(--rule);
}
.nav { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; font-weight: 700; letter-spacing: .01em; font-size: 1.02rem; }
.brand-mark { width: 34px; height: 34px; display: inline-grid; place-items: center; border: 1px solid var(--navy); color: var(--navy); font-size: .77rem; font-weight: 700; letter-spacing: .02em; }
.nav-links { display: flex; align-items: center; gap: 22px; flex-wrap: wrap; justify-content: flex-end; }
.nav-links a { color: var(--muted); text-decoration: none; padding: 7px 0 5px; border-bottom: 1px solid transparent; font-size: .92rem; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--navy); border-bottom-color: var(--navy); }

.hero { padding: 98px 0 84px; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(300px, .55fr); gap: 72px; align-items: start; }
.eyebrow, .kicker, .mini-label, .meta, .project-number {
  color: var(--navy);
  font-size: .76rem;
  font-weight: 700;
  letter-spacing: .13em;
  text-transform: uppercase;
}
.eyebrow { margin: 0 0 18px; }
.kicker { margin-bottom: 10px; }
.mini-label { margin-bottom: 10px; }
h1, h2, h3 { font-family: var(--serif); font-weight: 600; line-height: 1.12; letter-spacing: -.018em; margin-top: 0; }
h1 { font-size: clamp(3.1rem, 6.4vw, 5.8rem); max-width: 980px; margin-bottom: 26px; }
h2 { font-size: clamp(2rem, 3.7vw, 3.25rem); margin-bottom: 16px; }
h3 { font-size: 1.28rem; margin-bottom: 10px; }
.title-muted { color: var(--muted); font-weight: 400; }
.lead { color: #414a52; font-size: clamp(1.12rem, 1.8vw, 1.34rem); max-width: 820px; margin: 0 0 32px; }
.button-row { display: flex; gap: 10px; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 42px; padding: 9px 15px; text-decoration: none; font-weight: 600; border: 1px solid var(--navy); background: var(--paper); color: var(--navy); transition: background .15s ease, color .15s ease; }
.btn:hover { background: var(--navy-soft); }
.btn-primary { background: var(--navy); color: #fff; }
.btn-primary:hover { background: #102a42; }
.btn-secondary { background: var(--paper); }

.hero-panel, .card, .paper-card, .metric-card, .method-step, .callout, .table-wrap, .project-card, .project-detail, .notice {
  border: 1px solid var(--rule);
  background: var(--paper);
  border-radius: 0;
  box-shadow: none;
}
.hero-panel { border-top: 3px solid var(--navy); padding: 24px 26px; }
.hero-stat { display: grid; grid-template-columns: 120px 1fr; gap: 20px; align-items: baseline; padding: 15px 0; border-top: 1px solid var(--rule); }
.hero-stat:first-of-type { margin-top: 8px; }
.hero-stat strong { font-size: 1.22rem; font-weight: 600; color: var(--ink); }
.hero-stat span { color: var(--muted); font-size: .92rem; }

section { padding: 76px 0; }
.rule-section { border-top: 1px solid var(--rule); }
.section-intro { display: grid; grid-template-columns: minmax(0,.9fr) minmax(300px,.7fr); gap: 54px; align-items: end; margin-bottom: 36px; }
.section-intro p { color: var(--muted); max-width: 650px; margin: 0; }

.profile-grid { display: grid; grid-template-columns: minmax(0,1.35fr) minmax(280px,.65fr); gap: 56px; }
.bio-block h3 { margin-bottom: 14px; }
.bio-placeholder { min-height: 150px; border-top: 1px solid var(--rule-dark); border-bottom: 1px solid var(--rule); background: linear-gradient(to bottom, transparent 37px, #eceeed 38px, transparent 39px); background-size: 100% 39px; }
.profile-details { margin: 0; border-top: 1px solid var(--rule-dark); }
.profile-details > div { display: grid; grid-template-columns: 125px 1fr; gap: 18px; min-height: 52px; padding: 13px 0; border-bottom: 1px solid var(--rule); }
.profile-details dt { font-weight: 600; color: var(--navy); }
.profile-details dd { margin: 0; min-height: 1.4em; }

.project-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); border-top: 1px solid var(--rule-dark); border-left: 1px solid var(--rule); }
.project-card { padding: 28px; text-decoration: none; min-height: 278px; display: flex; flex-direction: column; border-top: 0; border-left: 0; transition: background .15s ease; }
.project-card:hover { background: var(--paper-alt); }
.project-card.featured { grid-column: 1 / -1; min-height: 300px; border-top: 2px solid var(--navy); }
.project-topline { display: flex; justify-content: space-between; gap: 18px; align-items: center; margin-bottom: 30px; }
.project-number { color: var(--navy); }
.badge { color: var(--navy); border: 1px solid var(--rule-dark); padding: 4px 8px; font-size: .73rem; font-weight: 600; }
.project-card h3 { font-size: clamp(1.55rem, 2.7vw, 2.15rem); }
.project-card p { color: var(--muted); max-width: 780px; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; padding-top: 18px; }
.tag { font-size: .75rem; color: #46505a; padding: 3px 7px; border: 1px solid var(--rule); }

.metrics { display: grid; grid-template-columns: repeat(4, 1fr); border-left: 1px solid var(--rule); border-top: 1px solid var(--rule); margin-top: 34px; }
.metric-card { padding: 22px; border-left: 0; border-top: 0; }
.metric-card strong { display: block; font-size: clamp(1.6rem, 2.8vw, 2.25rem); font-weight: 600; color: var(--navy); }
.metric-card span { color: var(--muted); font-size: .88rem; }

.skills-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); border-left: 1px solid var(--rule); border-top: 1px solid var(--rule); }
.card { padding: 24px; border-left: 0; border-top: 0; }
.card p, .card li { color: var(--muted); }
.card ul { margin: 14px 0 0; padding-left: 18px; }
.card li + li { margin-top: 6px; }

.callout { padding: 30px 32px; border-left: 4px solid var(--navy); }
.callout p { color: var(--muted); font-size: 1.03rem; margin: 0; }
.quote-line { font-size: clamp(1.65rem, 3vw, 2.5rem); font-weight: 500; line-height: 1.22; margin-bottom: 15px; }

.site-footer { padding: 32px 0 44px; border-top: 1px solid var(--rule); color: var(--muted); font-size: .9rem; }
.footer-row { display: flex; justify-content: space-between; gap: 22px; flex-wrap: wrap; }
.footer-links { display: flex; gap: 16px; flex-wrap: wrap; }
.footer-links a { color: var(--muted); }

/* Project detail pages */
.subhero { padding: 82px 0 56px; }
.subhero h1 { font-size: clamp(2.8rem, 5.8vw, 5.25rem); max-width: 1080px; }
.subhero .lead { max-width: 940px; }
.research-question { border-left: 3px solid var(--navy); padding: 2px 0 2px 18px; color: #39434c; font-size: 1.12rem; max-width: 940px; }

.wwar-layout { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(300px, .75fr); gap: 20px; align-items: start; }
.chart-card { padding: 28px; }
.supporting-text { color: var(--muted); margin-top: -2px; }
.chart { display: grid; gap: 18px; margin-top: 26px; }
.chart-row { display: grid; grid-template-columns: 56px minmax(0,1fr) 76px; gap: 12px; align-items: center; }
.chart-team { font-weight: 700; letter-spacing: .04em; }
.bar-track { height: 32px; background: #f2f3f3; border: 1px solid var(--rule); position: relative; overflow: hidden; }
.bar { position: absolute; inset: 0 auto 0 0; width: 0; background: var(--navy); transition: width .8s cubic-bezier(.2,.7,.2,1); }
.raw-marker { position: absolute; top: -2px; bottom: -2px; width: 2px; background: #8a4b31; z-index: 2; }
.chart-value { text-align: right; font-variant-numeric: tabular-nums; font-weight: 700; }
.chart-legend { display: flex; gap: 20px; color: var(--muted); font-size: .82rem; margin-top: 18px; flex-wrap: wrap; }
.legend-item { display: inline-flex; align-items: center; gap: 8px; }
.legend-swatch { width: 22px; height: 7px; background: var(--navy); }
.legend-line { width: 2px; height: 16px; background: #8a4b31; }
.insight-list { display: grid; gap: 12px; }
.insight-spacing { margin-top: 18px; }
.insight { border-bottom: 1px solid var(--rule); padding: 0 0 14px; }
.insight:last-child { border-bottom: 0; }
.insight strong { display: block; font-size: 1.05rem; }
.insight span { color: var(--muted); font-size: .9rem; }

.method-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--rule-dark); border-left: 1px solid var(--rule); }
.method-step { padding: 23px; border-top: 0; border-left: 0; }
.step-num { display: inline-flex; align-items: center; justify-content: center; color: var(--navy); font-weight: 700; font-size: .75rem; margin-bottom: 22px; border-bottom: 1px solid var(--navy); }
.method-step p { color: var(--muted); margin-bottom: 0; }

.table-wrap { overflow-x: auto; border-top: 2px solid var(--navy); }
table { border-collapse: collapse; width: 100%; min-width: 680px; }
th, td { text-align: left; padding: 13px 15px; border-bottom: 1px solid var(--rule); font-size: .9rem; vertical-align: top; }
th { color: var(--navy); background: var(--paper-alt); font-weight: 700; }
td { color: #414b54; }
tr:last-child td { border-bottom: 0; }
.numeric { font-variant-numeric: tabular-nums; }
.action-spacing { margin-top: 18px; }

.paper-grid { display: grid; grid-template-columns: minmax(250px,.64fr) minmax(0,1.36fr); gap: 52px; align-items: center; }
.paper-cover { max-width: 410px; border: 1px solid var(--rule-dark); }
.paper-copy p { color: var(--muted); }

.project-list { display: grid; gap: 0; border-top: 1px solid var(--rule-dark); }
.project-detail { padding: 34px 0; border: 0; border-bottom: 1px solid var(--rule); }
.project-detail p { color: var(--muted); max-width: 900px; }
.project-detail h2 { font-size: 2rem; margin-bottom: 10px; }
.project-detail .meta { color: var(--navy); }
.project-detail .tags { margin-top: 16px; padding-top: 0; }

.notice { padding: 15px 17px; color: #4e555c; font-size: .92rem; background: var(--paper-alt); }
.notice-spacing { margin-top: 18px; }

@media (max-width: 900px) {
  .hero-grid, .wwar-layout, .paper-grid, .profile-grid { grid-template-columns: 1fr; }
  .hero { padding-top: 68px; }
  .hero-panel { max-width: 650px; }
  .section-intro { grid-template-columns: 1fr; gap: 12px; }
  .metrics, .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .method-grid { grid-template-columns: repeat(2, 1fr); }
  .paper-cover { max-width: 330px; }
}

@media (max-width: 640px) {
  .container, .narrow { width: min(calc(100% - 28px), var(--max)); }
  .nav { min-height: 64px; }
  .nav-links { gap: 14px; }
  .nav-links a:not(.nav-essential) { display: none; }
  section { padding: 58px 0; }
  .hero { padding: 58px 0 52px; }
  .project-grid, .metrics, .skills-grid, .method-grid { grid-template-columns: 1fr; }
  .project-card.featured { grid-column: auto; }
  .hero-stat { grid-template-columns: 105px 1fr; gap: 14px; }
  .profile-details > div { grid-template-columns: 110px 1fr; }
  .chart-row { grid-template-columns: 46px minmax(0,1fr) 62px; gap: 8px; }
  .bar-track { height: 30px; }
}

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