/* Trevor Hyde — personal site. Color tokens and control styles follow hwGenie's "slate" theme. */
:root {
  --bg: #faf9f6;
  --fg: #20242a;
  --muted: #5d646f;
  --accent: #24589f;
  --border: #dcdad0;
  --card-bg: #efeee8;
  --code-bg: #f1f0ea;
  --hover-bg: #e2e8f3;
  --serif: Charter, "Bitstream Charter", Georgia, "Times New Roman", serif;
  --sans: system-ui, -apple-system, "Segoe UI", sans-serif;
  --measure: 46rem;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #15171c;
    --fg: #e7e5e0;
    --muted: #9aa1ad;
    --accent: #8db1ea;
    --border: #33363e;
    --card-bg: #1f222a;
    --code-bg: #22252d;
    --hover-bg: #2b3242;
  }
}
:root[data-theme="dark"] {
  --bg: #15171c;
  --fg: #e7e5e0;
  --muted: #9aa1ad;
  --accent: #8db1ea;
  --border: #33363e;
  --card-bg: #1f222a;
  --code-bg: #22252d;
  --hover-bg: #2b3242;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--serif);
  font-size: 1.0625rem;
  line-height: 1.6;
}
@media (prefers-reduced-motion: no-preference) {
  body { transition: background-color .2s ease, color .2s ease; }
}
[id] { scroll-margin-top: 4.5rem; }
a { color: var(--accent); text-decoration: none; }
main a:not(.btn) { padding: 0 .12em; margin: 0 -.12em; }
main a:not(.btn):hover { background: var(--hover-bg); }
img { max-width: 100%; height: auto; }
h1, h2, h3 { font-weight: 600; line-height: 1.2; margin: 0; }
h1 { font-size: 2rem; letter-spacing: -0.01em; }
h2 {
  font-size: 1.15rem;
  font-variant: small-caps;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.2rem;
  margin: 2.25rem 0 0.9rem;
}
h3 { font-size: 1.05rem; margin: 1.4rem 0 0.5rem; }
p { margin: 0 0 1rem; }
ul, ol { margin: 0 0 1rem; padding-left: 1.4rem; }
li { margin-bottom: 0.35rem; }
.muted { color: var(--muted); }
.small { font-size: 0.92rem; }

/* Layout */
.wrap {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 0 16px 4rem;
}
header.site {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding: 1.5rem 0 1rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2rem;
}
@media (max-width: 52rem) { header.site { padding-right: 2.75rem; } }
header.site .brand { font-weight: 600; font-size: 1.1rem; color: var(--fg); padding: 0 .2rem; margin: 0 -.2rem; }
header.site .brand:hover { background: var(--hover-bg); }
nav.main { font-family: var(--sans); font-size: 0.88rem; display: flex; flex-wrap: wrap; gap: .2rem .5rem; }
nav.main a { color: var(--muted); padding: .1rem .4rem; }
nav.main a:hover { background: var(--hover-bg); color: var(--accent); }
nav.main a[aria-current="page"] { color: var(--fg); font-weight: 600; }
footer.site {
  margin-top: 4rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-family: var(--sans);
  font-size: 0.82rem;
  color: var(--muted);
}
footer.site a { padding: 0 .12em; margin: 0 -.12em; }
footer.site a:hover { background: var(--hover-bg); }

/* Buttons (hwGenie .filebox style: flat, no border, inverts on hover) */
.btn, .links a {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  background: var(--card-bg);
  padding: .25rem .6rem;
  font-family: var(--sans);
  font-size: .85rem;
  white-space: nowrap;
  color: var(--accent);
  text-decoration: none;
}
.btn:hover, .links a:hover { background: var(--accent); color: var(--bg); }
.btn, .links a { margin: 0; }
.btn svg { flex-shrink: 0; }
.links { display: flex; flex-wrap: wrap; gap: .4rem .5rem; margin: 1.25rem 0 0; padding: 0; list-style: none; }
.links li { margin: 0; }

/* Theme toggle */
#themetoggle {
  position: fixed;
  top: .5rem;
  right: .7rem;
  z-index: 60;
  background: var(--card-bg);
  color: var(--fg);
  border: none;
  padding: .3rem .6rem;
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
}
#themetoggle:hover { background: var(--code-bg); }

/* Home */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px;
  gap: 2rem;
  align-items: start;
}
.hero .photo { border-radius: 6px; display: block; width: 100%; }
.hero h1 { margin-bottom: 0.25rem; }
.hero .title { font-size: 1.1rem; color: var(--muted); margin-bottom: 1.25rem; }
.contact { list-style: none; padding: 0; margin: 1.25rem 0 0; font-family: var(--sans); font-size: 0.92rem; }
.contact li { margin-bottom: 0.3rem; }
.contact .k { display: inline-block; min-width: 4.2rem; color: var(--muted); }
.hero .aside { display: flex; flex-direction: column; gap: .9rem; }
.hero .aside .links { flex-direction: column; align-items: stretch; margin: 0; }
.hero .aside .links a { display: flex; width: 100%; justify-content: center; padding: .35rem 1.1rem; }
@media (max-width: 640px) {
  .hero { grid-template-columns: 1fr; }
  .hero .aside { display: contents; }
  .hero .photo { width: 180px; order: -1; }
  .hero .aside .links { order: 1; flex-direction: row; margin-top: .25rem; }
  .hero .aside .links a { display: inline-flex; width: auto; }
}

/* Publication and talk lists */
ol.pubs { padding-left: 1.6rem; }
ol.pubs li { margin-bottom: 0.8rem; }
ol.pubs .t { font-style: italic; }
ol.pubs .with, ol.pubs .venue { display: block; }
ol.pubs .refs { display: block; font-family: var(--sans); font-size: 0.85rem; margin-top: .1rem; }
ol.pubs .refs a { margin-right: 0.8rem; }
.talks { list-style: none; padding: 0; }
.talks li { display: grid; grid-template-columns: 7.5rem 1fr; gap: 1rem; margin-bottom: 0.5rem; }
.talks .d { color: var(--muted); font-family: var(--sans); font-size: 0.88rem; padding-top: 0.15rem; }
@media (max-width: 480px) { .talks li { grid-template-columns: 1fr; gap: 0.1rem; } }

/* Teaching */
.courses { list-style: none; padding: 0; }
.courses li { display: grid; grid-template-columns: 1fr; margin-bottom: 0.6rem; }
.courses .c { font-weight: 600; }
.courses .s { color: var(--muted); }

/* Resources */
.toc-inline { font-family: var(--sans); font-size: 0.9rem; columns: 2; column-gap: 2rem; }
.toc-inline li { break-inside: avoid; }
@media (max-width: 520px) { .toc-inline { columns: 1; } }

/* CV */
.cv h1 { font-variant: small-caps; text-align: center; font-size: 2.2rem; }
.cv .head { text-align: center; margin-bottom: 1rem; }
.cv .head .t { font-variant: small-caps; font-size: 1.15rem; letter-spacing: 0.02em; }
.cv .head .c { font-family: var(--sans); font-size: 0.88rem; color: var(--muted); }
.cv .actions { display: flex; justify-content: center; gap: .5rem; margin: 0.9rem 0 1.5rem; }
table.cv { width: 100%; border-collapse: collapse; margin-bottom: 0.5rem; }
table.cv td { vertical-align: top; padding: 0.15rem 0; }
table.cv td.what { padding-right: 1rem; }
table.cv td.where { width: 11.5rem; padding-right: 0.5rem; color: var(--muted); }
table.cv td.when { width: 6.5rem; text-align: right; white-space: nowrap; }
table.cv td.note { padding-left: 1.5rem; }
@media (max-width: 600px) {
  table.cv, table.cv tbody, table.cv tr, table.cv td { display: block; width: auto; }
  table.cv tr { margin-bottom: 0.6rem; }
  table.cv td.where, table.cv td.when { text-align: left; padding: 0; font-family: var(--sans); font-size: 0.88rem; }
  table.cv td.note { padding-left: 0; }
}
.cv ol { padding-left: 1.6rem; }
.cv ol li { margin-bottom: 0.4rem; }
.cv ul.dash { list-style: none; padding-left: 0; }
.cv ul.dash li { padding-left: 1.1rem; text-indent: -1.1rem; margin-bottom: 0.3rem; }
.cv ul.dash li::before { content: "\25AA"; color: var(--muted); font-size: .7em; position: relative; top: -.1em; margin-right: .55em; }
.cv .ug { color: var(--accent); }

/* Sticky bar that slides in after scrolling (hwGenie "scrollbar") */
.scrollbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: .9rem;
  padding: .45rem 3.4rem .45rem .9rem;
  background: var(--card-bg);
  box-shadow: 0 1px 10px rgba(0, 0, 0, .14);
  font-family: var(--sans);
  font-size: .85rem;
  overflow-x: auto;
  transform: translateY(-100%);
  transition: transform .18s ease;
  white-space: nowrap;
}
.scrollbar.visible { transform: translateY(0); }
.scrollbar a { color: var(--accent); padding: .1rem .3rem; }
.scrollbar a:hover { background: var(--hover-bg); }
.scrollbar .sb-label { color: var(--muted); }
.scrollbar .sb-top { margin-left: auto; }
.scrollbar .sb-toc {
  background: none;
  border: none;
  font: inherit;
  color: var(--accent);
  cursor: pointer;
  padding: .1rem .3rem;
}
.scrollbar .sb-toc:hover { background: var(--hover-bg); }
.scrollbar .sb-toc::after { content: " ▾"; }
.scrollbar .sb-toc[aria-expanded="true"]::after { content: " ▴"; }
@media (max-width: 30rem) { .scrollbar { gap: .55rem; padding-left: .7rem; } }

/* Table of contents: fixed in the left gutter when the viewport can hold one
   beside the 46rem column; otherwise a dropdown under the sticky bar. */
nav.toc { font-family: var(--sans); font-size: .82rem; line-height: 1.4; }
nav.toc .toc-title {
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 .45rem .6rem;
}
nav.toc ul { list-style: none; margin: 0; padding: 0; }
nav.toc li { margin: 0; }
nav.toc a { display: block; color: var(--fg); padding: .28rem .6rem; border-left: 2px solid transparent; }
nav.toc a:hover { background: var(--hover-bg); }
nav.toc a.active { color: var(--accent); font-weight: 600; border-left-color: var(--accent); }
nav.toc li.toc-l2 a { padding-left: 1.5rem; }
@media (min-width: 78rem) {
  nav.toc {
    position: fixed;
    top: 5rem;
    left: calc(50% - 38.5rem);   /* 23rem half-column + 1.5rem gap + 14rem */
    width: 14rem;
    max-height: calc(100vh - 6.5rem);
    overflow-y: auto;
    z-index: 40;
  }
  .scrollbar .sb-toc { display: none; }
}
@media (max-width: 77.99rem) {
  nav.toc {
    position: fixed;
    left: 0; right: 0;
    top: 0;                      /* moved below the sticky bar by script */
    z-index: 49;
    display: none;
    background: var(--card-bg);
    box-shadow: 0 6px 14px rgba(0, 0, 0, .14);
    max-height: min(70vh, 26rem);
    overflow-y: auto;
    padding: .5rem .6rem .7rem;
  }
  nav.toc.open { display: block; }
  nav.toc .toc-title { display: none; }
}

@media print {
  :root { --bg: #fff; --fg: #000; --muted: #444; --border: #999; --accent: #24589f; --card-bg: #fff; --hover-bg: #fff; }
  body { font-size: 10.5pt; line-height: 1.35; }
  .wrap { max-width: none; padding: 0; }
  header.site, footer.site, .cv .actions, nav.toc, .scrollbar, #themetoggle { display: none; }
  h2 { margin: 12pt 0 5pt; page-break-after: avoid; }
  h3 { page-break-after: avoid; }
  table.cv tr, li { page-break-inside: avoid; }
  a { color: inherit; }
  @page { margin: 0.75in 0.9in; }
}