/* Steven M. Carr — personal site
   Single stylesheet, no external dependencies. */

:root {
  color-scheme: light dark;

  --brown: #6c4023;
  --brown-light: #8a5a37;
  --gold: #b98b28;

  --bg: #fbfaf8;
  --bg-panel: #ffffff;
  --bg-subtle: #f3f0ec;
  --text: #24201d;
  --text-muted: #5d5750;
  --border: #e2dcd4;
  --link: #7a4a24;
  --link-hover: #a8641f;

  --max: 62rem;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #171513;
    --bg-panel: #1f1c19;
    --bg-subtle: #262220;
    --text: #ece7e1;
    --text-muted: #a89f95;
    --border: #38322c;
    --link: #e0a969;
    --link-hover: #f3c58c;
    --brown: #d8b58c;
    --brown-light: #c99e6d;
    --gold: #e0b055;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.62;
}

img { max-width: 100%; height: auto; }

a { color: var(--link); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--link-hover); }

/* ---------- Header / nav ---------- */

.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg-panel);
}

.site-header .wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1rem 1.25rem;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 1.5rem;
}

.brand {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
}

.brand:hover { color: var(--link-hover); }

nav.site-nav {
  margin-left: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.1rem;
  font-size: 0.94rem;
}

nav.site-nav a {
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.15rem 0;
  border-bottom: 2px solid transparent;
}

nav.site-nav a:hover { color: var(--link-hover); }

nav.site-nav a[aria-current="page"] {
  color: var(--text);
  border-bottom-color: var(--gold);
  font-weight: 600;
}

/* ---------- Layout ---------- */

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

.page-title {
  font-family: var(--font-serif);
  font-size: 2rem;
  line-height: 1.2;
  margin: 0 0 0.35rem;
  color: var(--text);
}

.page-subtitle {
  color: var(--text-muted);
  margin: 0 0 2.25rem;
  font-size: 1.02rem;
}

h2 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  margin: 2.75rem 0 0.9rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--border);
}

h3 {
  font-size: 1.06rem;
  margin: 1.75rem 0 0.5rem;
}

section:first-of-type > h2:first-child { margin-top: 0; }

p { margin: 0 0 1rem; }

/* ---------- Home hero ---------- */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem;
  align-items: start;
}

@media (min-width: 44rem) {
  .hero:has(.hero-photo) { grid-template-columns: 220px minmax(0, 1fr); }
}

.hero-photo {
  width: 220px;
  max-width: 100%;
  aspect-ratio: 2 / 3;
  border-radius: 8px;
  object-fit: cover;
  border: 1px solid var(--border);
  background: var(--bg-subtle);
}

.hero h1 {
  font-family: var(--font-serif);
  font-size: 2.3rem;
  line-height: 1.15;
  margin: 0 0 0.3rem;
}

.hero .titles {
  color: var(--text-muted);
  margin: 0 0 1.25rem;
}

.hero .titles span { display: block; }

/* ---------- Buttons ---------- */

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 1.25rem 0 0;
  padding: 0;
  list-style: none;
}

.btn {
  display: inline-block;
  padding: 0.42rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-panel);
  color: var(--link);
  font-size: 0.92rem;
  text-decoration: none;
}

.btn:hover { border-color: var(--gold); color: var(--link-hover); }

.btn-primary {
  background: var(--brown);
  border-color: var(--brown);
  color: #fff;
}

@media (prefers-color-scheme: dark) {
  .btn-primary { color: #1a1614; }
}

.btn-primary:hover { background: var(--brown-light); border-color: var(--brown-light); color: #fff; }

@media (prefers-color-scheme: dark) {
  .btn-primary:hover { color: #1a1614; }
}

/* ---------- Cards / stats ---------- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1rem;
  margin: 1.25rem 0 0;
}

.card {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-panel);
  padding: 1.1rem 1.15rem;
}

.card h3 { margin: 0 0 0.4rem; font-size: 1.02rem; }
.card p { margin: 0; color: var(--text-muted); font-size: 0.95rem; }
.card p + p { margin-top: 0.6rem; }

.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
  padding: 0;
  list-style: none;
}

.stat {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-panel);
  padding: 0.9rem 1rem;
}

.stat .num {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.85rem;
  line-height: 1.1;
  color: var(--brown);
}

.stat .label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-top: 0.2rem;
}

/* ---------- Positions / timeline ---------- */

.positions { margin: 0; padding: 0; list-style: none; }

.positions > li {
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--border);
  display: grid;
  gap: 0.15rem 1.5rem;
}

@media (min-width: 44rem) {
  .positions > li { grid-template-columns: minmax(0, 1fr) 13rem; }
  .positions .dates { text-align: right; }
}

.positions > li:last-child { border-bottom: none; }

.positions .role { font-weight: 600; }

.positions .org { color: var(--text-muted); font-size: 0.95rem; }

.positions .dates {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

/* ---------- Plain lists ---------- */

ul.tight { padding-left: 1.15rem; margin: 0 0 1rem; }
ul.tight li { margin-bottom: 0.45rem; }

/* ---------- Publication / grant lists ---------- */

ol.pubs {
  counter-reset: pub;
  list-style: none;
  padding: 0;
  margin: 0;
}

ol.pubs > li {
  counter-increment: pub;
  position: relative;
  padding: 0.75rem 0 0.75rem 2.6rem;
  border-bottom: 1px solid var(--border);
}

ol.pubs > li:last-child { border-bottom: none; }

ol.pubs > li::before {
  content: counter(pub) ".";
  position: absolute;
  left: 0;
  top: 0.75rem;
  width: 2.1rem;
  text-align: right;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-variant-numeric: tabular-nums;
}

.pub-title { font-weight: 600; }
.pub-venue { color: var(--text-muted); font-style: italic; }
.pub-meta { color: var(--text-muted); font-size: 0.92rem; display: block; margin-top: 0.1rem; }

.award { color: var(--text-muted); font-size: 0.92rem; display: block; margin-top: 0.1rem; }
.award .amount { font-variant-numeric: tabular-nums; }

.role-tag {
  display: inline-block;
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.08rem 0.42rem;
  border-radius: 4px;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  color: var(--text-muted);
  vertical-align: 0.08em;
  margin-left: 0.35rem;
  white-space: nowrap;
}

.role-tag.pi { color: var(--brown); border-color: var(--gold); }

/* ---------- Section jump links ---------- */

.jump {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0;
  margin: 0 0 2rem;
  list-style: none;
  font-size: 0.9rem;
}

.jump a {
  display: inline-block;
  padding: 0.28rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-panel);
  text-decoration: none;
  color: var(--text-muted);
}

.jump a:hover { border-color: var(--gold); color: var(--link-hover); }

/* ---------- Callout ---------- */

.callout {
  border: 1px solid var(--border);
  border-left: 3px solid var(--gold);
  border-radius: 6px;
  background: var(--bg-panel);
  padding: 1rem 1.15rem;
  margin: 1.5rem 0;
}

.callout p:last-child { margin-bottom: 0; }

/* ---------- Contact ---------- */

.contact-list { margin: 0; }
.contact-list dt {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-top: 1rem;
}
.contact-list dd { margin: 0.15rem 0 0; }

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-panel);
  color: var(--text-muted);
  font-size: 0.9rem;
}

.site-footer .wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.5rem 1.25rem 2.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  justify-content: space-between;
}

.site-footer a { color: var(--text-muted); }
.site-footer a:hover { color: var(--link-hover); }

/* ---------- Utility ---------- */

.muted { color: var(--text-muted); }
.nowrap { white-space: nowrap; }

.skip-link {
  position: absolute;
  left: -9999px;
}
.skip-link:focus {
  left: 0.5rem;
  top: 0.5rem;
  z-index: 10;
  background: var(--bg-panel);
  border: 1px solid var(--gold);
  border-radius: 4px;
  padding: 0.4rem 0.8rem;
}

@media print {
  .site-header nav, .site-footer, .jump, .btn-row { display: none; }
  body { font-size: 11pt; }
  main { max-width: none; }
}