/* Project page styles. Tokens and typography follow danielpmorton.github.io. */

/* ---------- Theme tokens ---------- */

:root {
  --bg: #fcfcfb;
  --surface: #ffffff;
  --fg: #16181b;
  --muted: #5d636b;
  --faint: #8b9098;
  --line: rgba(20, 24, 30, 0.09);
  --accent: #8c1515;
  --accent-soft: rgba(140, 21, 21, 0.07);
  --good: #1f7a3a;
  --good-soft: rgba(31, 122, 58, 0.09);
  --bad: #b3261e;
  --bad-soft: rgba(179, 38, 30, 0.08);
  --figure-bg: #ffffff;
  --font-body: "Geist", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "Geist Mono", ui-monospace, "SF Mono", Menlo, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #111315;
    --surface: #181b1e;
    --fg: #ececea;
    --muted: #a3a8ae;
    --faint: #7a8087;
    --line: rgba(255, 255, 255, 0.1);
    --accent: #e0706a;
    --accent-soft: rgba(224, 112, 106, 0.12);
    --good: #6cc488;
    --good-soft: rgba(108, 196, 136, 0.12);
    --bad: #f08a80;
    --bad-soft: rgba(240, 138, 128, 0.12);
    --figure-bg: #f4f4f2;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #111315;
  --surface: #181b1e;
  --fg: #ececea;
  --muted: #a3a8ae;
  --faint: #7a8087;
  --line: rgba(255, 255, 255, 0.1);
  --accent: #e0706a;
  --accent-soft: rgba(224, 112, 106, 0.12);
  --good: #6cc488;
  --good-soft: rgba(108, 196, 136, 0.12);
  --bad: #f08a80;
  --bad-soft: rgba(240, 138, 128, 0.12);
  --figure-bg: #f4f4f2;
  color-scheme: dark;
}

/* ---------- Base ---------- */

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 15px/1.6 var(--font-body);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 3px;
}

img, video { display: block; max-width: 100%; }

em { font-style: italic; }
strong { font-weight: 600; }

.page {
  max-width: 1000px;
  margin: 0 auto;
  padding: 72px 20px 48px;
}

/* Prose stays at the personal-site measure; media can use the full width. */
.narrow { max-width: 720px; margin-left: auto; margin-right: auto; }

section { margin-top: 88px; }

.eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 20px;
  font: 500 11.5px/1 var(--font-mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
}

.eyebrow::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

.eyebrow .num { color: var(--accent); }

h2.statement {
  margin: 0 0 14px;
  font-size: 23px;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.3;
  text-wrap: balance;
}

h3.sub {
  margin: 44px 0 10px;
  font-size: 16.5px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

p { margin: 0 0 1em; }

.lede { color: var(--muted); }
.lede strong, .lede em { color: var(--fg); }

.prose a, .lede a {
  color: var(--fg);
  border-bottom: 1px solid var(--line);
  transition: border-color 0.2s;
}
.prose a:hover, .lede a:hover { border-color: var(--accent); }

code {
  font: 13px var(--font-mono);
  padding: 1px 5px;
  border-radius: 4px;
  background: var(--accent-soft);
}

/* ---------- Theme toggle ---------- */

.theme-toggle {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 10;
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--surface);
  color: var(--muted);
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
}

.theme-toggle:hover { color: var(--fg); border-color: var(--faint); }

.theme-toggle svg {
  width: 17px;
  height: 17px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.theme-toggle .icon-sun { display: none; }

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .icon-sun { display: block; }
  :root:not([data-theme="light"]) .theme-toggle .icon-moon { display: none; }
}
:root[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

.home-link {
  position: fixed;
  top: 22px;
  left: 20px;
  z-index: 10;
  font: 400 12px var(--font-mono);
  color: var(--faint);
}
.home-link:hover { color: var(--accent); }

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

.header { text-align: center; }

.venue {
  display: inline-block;
  margin-bottom: 18px;
  padding: 5px 8px;
  border-radius: 4px;
  background: var(--accent-soft);
  color: var(--accent);
  font: 500 11px/1 var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.title {
  margin: 0 auto;
  max-width: 760px;
  font-size: 38px;
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.15;
  text-wrap: balance;
}

.title .name { color: var(--accent); }

.authors {
  margin-top: 22px;
  font-size: 15.5px;
}

.authors a { border-bottom: 1px solid var(--line); transition: border-color 0.2s; }
.authors a:hover { border-color: var(--accent); }
.authors sup { color: var(--faint); font-size: 10px; margin-left: 1px; }
.authors .sep { color: var(--faint); margin: 0 8px; }

.affiliations {
  margin-top: 6px;
  font-size: 13.5px;
  color: var(--muted);
}
.affiliations sup { color: var(--faint); font-size: 9.5px; }
.affiliations span + span { margin-left: 14px; }

.links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-top: 26px;
}

.links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  font: 500 12.5px var(--font-mono);
  color: var(--fg);
  transition: border-color 0.2s, color 0.2s;
}
.links a:hover { border-color: var(--accent); color: var(--accent); }
.links a::after { content: "↗"; color: var(--faint); }

/* ---------- Media building blocks ---------- */

/* Paper figures have white backgrounds; keep them on a light card in both themes. */
.figure-card {
  margin: 0;
  padding: 18px;
  border-radius: 12px;
  background: var(--figure-bg);
  box-shadow: 0 0 0 1px var(--line);
}
.figure-card img { width: 100%; height: auto; }

/* Software cards: small logo tiles linking to the supporting libraries. */
.software {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  max-width: 720px;
  margin: 24px auto 32px;
}
.software-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px;
  border-radius: 10px;
  background: var(--surface);
  box-shadow: 0 0 0 1px var(--line);
  color: var(--fg);
  text-decoration: none;
  transition: box-shadow 0.15s;
}
.software-card:hover { box-shadow: 0 0 0 1px var(--accent); }
.software-logo {
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 8px;
}
.software-logo img { max-width: 80%; max-height: 100%; width: auto; height: auto; }
.software-name { font: 500 14px var(--font-mono); }
.software-desc { font-size: 13px; color: var(--muted); line-height: 1.4; }

figcaption, .caption {
  margin-top: 10px;
  font-size: 13.5px;
  color: var(--muted);
  text-align: center;
}

.clip { min-width: 0; }

.clip video {
  width: 100%;
  height: auto;
  border-radius: 10px;
  background: var(--surface);
  box-shadow: 0 0 0 1px var(--line);
}

.clip-head {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 8px;
  min-height: 2.7em;
  font-size: 13px;
  font-weight: 500;
  line-height: 1.35;
}

.clip-head .letter {
  flex: none;
  font: 500 11.5px var(--font-mono);
  color: var(--faint);
}

.clip-foot {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 8px;
}

.chips { display: flex; flex-wrap: wrap; gap: 4px; }

.chip {
  padding: 3px 6px;
  border-radius: 4px;
  border: 1px solid var(--line);
  font: 500 10px/1.2 var(--font-mono);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
}
.chip b { color: var(--fg); font-weight: 600; }

.outcome {
  font-size: 12.5px;
  font-weight: 500;
  line-height: 1.35;
}
.outcome::before { margin-right: 5px; }
.outcome.good { color: var(--good); }
.outcome.good::before { content: "✓"; }
.outcome.bad { color: var(--bad); }
.outcome.bad::before { content: "✕"; }
.outcome.neutral { color: var(--muted); }

.grid { display: grid; gap: 22px 16px; }
.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); }
.grid.cols-5 { grid-template-columns: repeat(5, 1fr); gap: 16px 12px; }

/* Karate layout: a kinematic group and a physics group, mirroring the paper figure. */
.split {
  display: grid;
  grid-template-columns: 2fr 3fr;
  gap: 28px;
}

.split > div { min-width: 0; }

.split .group-label {
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  font: 500 11px var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--faint);
}

.split .grid { gap: 16px 12px; }

.replay {
  display: block;
  margin: 14px auto 0;
  padding: 5px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: none;
  color: var(--muted);
  font: 400 11.5px var(--font-mono);
  cursor: pointer;
}
.replay:hover { color: var(--accent); border-color: var(--accent); }

.hero-caption {
  max-width: 820px;
  margin: 14px auto 0;
  text-align: left;
  line-height: 1.55;
}
.hero-caption strong { color: var(--fg); }

/* ---------- Code + BibTeX ---------- */

pre {
  position: relative;
  margin: 0;
  padding: 16px 18px;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  font: 12.5px/1.6 var(--font-mono);
}

pre code { padding: 0; background: none; font: inherit; }

.copy {
  position: absolute;
  top: 10px;
  right: 10px;
  padding: 4px 9px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--bg);
  color: var(--muted);
  font: 400 11px var(--font-mono);
  cursor: pointer;
}
.copy:hover { color: var(--accent); border-color: var(--accent); }

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

.footer {
  margin-top: 88px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  font: 400 12px var(--font-mono);
  color: var(--faint);
}
.footer a { color: var(--muted); }
.footer a:hover { color: var(--accent); }

/* ---------- Responsive ---------- */

@media (max-width: 860px) {
  .split { grid-template-columns: 1fr; }
  .grid.cols-5 { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 640px) {
  .page { padding: 64px 16px 40px; }
  .title { font-size: 28px; }
  section { margin-top: 64px; }
  .grid.cols-3, .grid.cols-4, .grid.cols-5 { grid-template-columns: repeat(2, 1fr); }
  .home-link { display: none; }
  .software { grid-template-columns: 1fr; gap: 10px; }
  .software-card { display: grid; grid-template-columns: 96px 1fr; column-gap: 14px; align-items: center; }
  .software-logo { grid-row: span 2; height: 48px; margin-bottom: 0; }
  .software-logo img { max-width: 100%; }
}