:root {
  --paper: #fffff8;
  --ink: #141210;
  --carnelian: #b31b1b;
  --carnelian-deep: #7a1010;
  --slate: #5d5749;
  --hairline: #dad4c4;
  --wash: #f5f1e4;
  --serif: "Palatino Linotype", Palatino, "Book Antiqua", "URW Palladio L", Georgia, serif;
  --sans: "Gill Sans", "Gill Sans MT", Seravek, "Avenir Next", Avenir, "Trebuchet MS", sans-serif;
  --mono: "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --measure: 43rem;
}

* { box-sizing: border-box; }

html {
  font-size: 17px;
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  line-height: 1.58;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--carnelian); text-decoration: none; }
a:hover { color: var(--carnelian-deep); text-decoration: underline; text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--carnelian); outline-offset: 2px; }

::selection { background: #f3d9d4; }

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

.container {
  max-width: 71rem;
  margin: 0 auto;
  padding: 0 clamp(1.1rem, 4vw, 2.6rem);
}

/* Navigation: a fixed left rail on wide screens, a top bar on narrow ones */

body { padding-left: 10.5rem; }

.site-rail {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 9.5rem;
  z-index: 40;
  display: flex;
  flex-direction: column;
  gap: 1.7rem;
  padding: 1.5rem 1.15rem;
  background: rgba(255, 255, 248, 0.92);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border-right: 1px solid var(--hairline);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--sans);
  font-size: 0.86rem;
  letter-spacing: 0.22em;
  color: var(--ink);
  text-transform: uppercase;
}
.brand:hover { text-decoration: none; color: var(--carnelian); }
.brand svg { display: block; }
.site-rail .brand { align-self: flex-start; }

.nav-links {
  font-family: var(--sans);
  font-size: 0.74rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}
.site-rail .nav-links {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}
.site-rail .nav-links a {
  color: var(--slate);
  padding: 0.05rem 0 0.05rem 0.7rem;
  border-left: 2px solid transparent;
}
.site-rail .nav-links a:hover { color: var(--carnelian); text-decoration: none; }
.site-rail .nav-links a.active { color: var(--carnelian); border-left-color: var(--carnelian); }

/* Hamburger toggle: hidden on the wide-screen rail, shown when it collapses */
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 2.15rem;
  height: 2.15rem;
  padding: 0;
  border: 1px solid var(--hairline);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
}
.nav-toggle:hover { color: var(--carnelian); border-color: var(--carnelian); }
.nav-toggle svg { display: block; }
.nav-toggle .ic-close { display: none; }
.site-rail.open .nav-toggle .ic-menu { display: none; }
.site-rail.open .nav-toggle .ic-close { display: block; }

@media (max-width: 820px) {
  body { padding-left: 0; }
  .site-rail {
    position: sticky;
    top: 0;
    left: 0;
    right: auto;
    bottom: auto;
    width: auto;
    height: auto;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.5rem clamp(1.1rem, 4vw, 2.6rem);
    border-right: none;
    border-bottom: 1px solid var(--hairline);
  }
  .nav-toggle { display: inline-flex; }
  /* Open menu: a full-width dropdown panel below the bar */
  .site-rail .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--paper);
    padding: 0.2rem clamp(1.1rem, 4vw, 2.6rem) 0.55rem;
    border-bottom: 1px solid var(--hairline);
    box-shadow: 0 8px 16px rgba(20, 18, 16, 0.06);
  }
  .site-rail.open .nav-links { display: flex; }
  .site-rail .nav-links a { padding: 0.6rem 0; border-left: none; }
  .site-rail .nav-links a.active { border-left: none; color: var(--carnelian); }
}

/* Front matter (title block) */

.frontmatter {
  padding: clamp(2.4rem, 6vw, 4.2rem) 0 1.4rem;
}

.eyebrow {
  font-family: var(--sans);
  font-size: 0.74rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--carnelian);
  margin: 0 0 1.1rem;
}

.title {
  font-weight: 400;
  font-size: clamp(2.6rem, 7vw, 4.4rem);
  letter-spacing: 0.045em;
  line-height: 1;
  margin: 0;
}

.subtitle {
  font-style: italic;
  font-size: clamp(1.12rem, 2.4vw, 1.5rem);
  color: var(--ink);
  max-width: 50rem;
  margin: 0.7rem 0 0;
  line-height: 1.45;
}
.subtitle b {
  font-weight: 400;
  font-style: normal;
  color: var(--carnelian);
}

.authors {
  margin: 1.7rem 0 0.35rem;
  font-size: 1.02rem;
  max-width: 54rem;
  line-height: 1.7;
}
.authors a { color: var(--ink); border-bottom: 1px solid var(--hairline); }
.authors a:hover { color: var(--carnelian); text-decoration: none; border-bottom-color: var(--carnelian); }
.authors sup { font-size: 0.68em; color: var(--slate); }

.affiliations {
  font-family: var(--sans);
  font-size: 0.8rem;
  letter-spacing: 0.02em;
  color: var(--slate);
  margin: 0 0 0.4rem;
}
.affiliations sup { color: var(--carnelian); }

.venue {
  font-style: italic;
  font-size: 1.02rem;
  margin: 0.55rem 0 0;
}
.venue strong { font-weight: 600; font-style: normal; }

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 1.6rem 0 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  border: 1px solid var(--ink);
  color: var(--ink);
  background: transparent;
  padding: 0.52em 1.05em;
  font-family: var(--sans);
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 120ms ease, color 120ms ease, border-color 120ms ease;
}
.btn:hover {
  background: var(--carnelian);
  border-color: var(--carnelian);
  color: var(--paper);
  text-decoration: none;
}
.btn svg { flex: none; }

.btn.placeholder {
  border: 1px dashed var(--hairline);
  color: var(--slate);
  cursor: default;
}
.btn.placeholder:hover { background: transparent; color: var(--slate); border-color: var(--hairline); }
.btn.placeholder .soon {
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  color: var(--carnelian);
  border: 1px solid currentColor;
  border-radius: 2px;
  padding: 0 0.3em;
  margin-left: 0.15em;
}

/* Hardware pages: title block and hero figure share the first screen */

.frontmatter.split {
  display: grid;
  grid-template-columns: minmax(0, 10fr) minmax(0, 11fr);
  gap: clamp(1.6rem, 4vw, 3rem);
  align-items: center;
  padding: clamp(1.6rem, 4vw, 2.8rem) 0 1.4rem;
}
.frontmatter.split .title { font-size: clamp(2.4rem, 5vw, 3.6rem); }
.frontmatter.split .hero-fig { margin: 0; }
@media (max-width: 900px) {
  .frontmatter.split { grid-template-columns: minmax(0, 1fr); gap: 1.5rem; }
}

/* Home page: condensed title block + hero video sized to the first screen */

body.home .frontmatter { padding: clamp(0.9rem, 2.2vw, 1.5rem) 0 0.3rem; }
body.home .title { font-size: clamp(2.2rem, 5.2vw, 3.1rem); }
body.home .subtitle { font-size: clamp(1.12rem, 2.4vw, 1.48rem); line-height: 1.34; margin-top: 0.4rem; }
body.home .authors { font-size: 0.95rem; line-height: 1.45; margin-top: 0.7rem; }
body.home .affiliations { margin: 0 0 0.2rem; }
body.home .venue { font-size: 0.96rem; margin-top: 0.3rem; }
body.home .actions { margin-top: 0.85rem; }
body.home .btn { padding: 0.44em 0.9em; }

body.home .hero-video { margin: clamp(0.75rem, 1.8vw, 1.1rem) 0 0; max-width: 100%; }
@media (min-width: 821px) {
  /* title block + unmute note take ~23rem; give the video the rest so the 16:9 frame clears the fold */
  body.home .hero-video { max-width: min(100%, calc((100vh - 23rem) * 16 / 9)); }
}

/* Taxel strip divider: the crimson "contact" patch slides along the 22 dots per section */

.taxel-strip {
  display: flex;
  align-items: center;
  gap: 1.1rem;
  margin: clamp(2.6rem, 6vw, 4rem) 0 0;
}
.taxel-strip svg { flex: none; max-width: 100%; }
.taxel-strip::after {
  content: "";
  flex: 1;
  border-top: 1px solid var(--hairline);
}

/* Sections & prose */

section { padding: 0.4rem 0 0.8rem; }

.section-label {
  font-family: var(--sans);
  font-size: clamp(1.3rem, 2.8vw, 1.8rem);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--carnelian);
  margin: 1.4rem 0 1.1rem;
}

h3 {
  font-weight: 400;
  font-style: italic;
  font-size: 1.24rem;
  margin: 2rem 0 0.5rem;
  max-width: var(--measure);
}

p, .prose ul, .prose ol { max-width: var(--measure); }
p { margin: 0 0 1.05rem; }

.lede { font-size: 1.13rem; }

.prose ul, .prose ol { padding-left: 1.3rem; margin: 0 0 1.05rem; }
.prose li { margin-bottom: 0.45rem; }
.prose li::marker { color: var(--carnelian); }

strong { font-weight: 600; }

.smallcaps {
  font-variant: small-caps;
  letter-spacing: 0.04em;
}

.note-inset {
  display: block;
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--slate);
  margin: 0.7rem 0 0.9rem;
  padding-left: 0.85rem;
  border-left: 2px solid var(--hairline);
  max-width: 34rem;
}

/* Figures */

figure { margin: 1.9rem 0; clear: both; }
/* figures share the 52rem measure of tables and captions */
figure.fig-full { max-width: 52rem; }
figure.fig-body { max-width: var(--measure); }

figure img {
  width: 100%;
  border: 1px solid var(--hairline);
}

figcaption {
  font-family: var(--sans);
  font-size: 0.8rem;
  line-height: 1.55;
  color: var(--slate);
  margin-top: 0.6rem;
  max-width: 52rem;
}
figcaption .fig-num {
  color: var(--carnelian);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-right: 0.4em;
}

/* Video */

.video-frame {
  position: relative;
  clear: both;
  aspect-ratio: 16 / 9;
  max-width: 100%;
  border: 1px solid var(--hairline);
  background: var(--wash);
  margin: 1.9rem 0;
}
.video-frame iframe,
.video-frame video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.video-note {
  font-family: var(--sans);
  font-size: 0.78rem;
  color: var(--slate);
  margin: 0.45rem 0 0;
}
.video-note svg { vertical-align: -0.12em; margin-right: 0.35em; }

.video-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.1rem;
  margin: 1.6rem 0;
  max-width: 52rem;
}
@media (max-width: 860px) {
  .video-grid { grid-template-columns: 1fr; }
}

.video-card {
  border: 1px solid var(--hairline);
  background: var(--wash);
}
.video-card .thumb {
  aspect-ratio: 16 / 9;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  color: var(--slate);
  font-family: var(--sans);
  font-size: 0.72rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  border-bottom: 1px dashed var(--hairline);
}
.video-card .thumb svg { opacity: 0.85; }
.video-card .label {
  font-family: var(--sans);
  font-size: 0.8rem;
  letter-spacing: 0.03em;
  color: var(--ink);
  padding: 0.6rem 0.8rem;
}
.video-card .label em { color: var(--slate); font-style: italic; }

/* Tables: horizontal rules only */

.table-wrap { overflow-x: auto; margin: 1.6rem 0; max-width: 52rem; }

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.92rem;
  font-variant-numeric: tabular-nums;
  /* the table's own 2px rule wins the border-collapse conflict on the last
     row even when a rowspan cell isn't in the literal last <tr> */
  border-bottom: 2px solid var(--ink);
}

caption {
  caption-side: top;
  text-align: left;
  font-family: var(--sans);
  font-size: 0.8rem;
  color: var(--slate);
  padding-bottom: 0.55rem;
}
caption .fig-num {
  color: var(--carnelian);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-right: 0.4em;
}

th {
  font-family: var(--sans);
  font-weight: 500;
  font-size: 0.74rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--slate);
  text-align: left;
  padding: 0.45rem 0.9rem 0.45rem 0;
  border-top: 2px solid var(--ink);
  border-bottom: 1px solid var(--hairline);
}

td {
  padding: 0.42rem 0.9rem 0.42rem 0;
  border-bottom: 1px solid var(--hairline);
  vertical-align: top;
}

th.num, td.num { text-align: right; }

td.best { color: var(--carnelian); font-weight: 600; }

.arrow { color: var(--slate); font-size: 0.85em; }

/* Hardware build pages */

/* Step headings are h3 for a sane outline, restyled from the italic default */
h3.step {
  font-style: normal;
  font-weight: 600;
  font-size: 1.02rem;
  margin: 1.9rem 0 0.45rem;
}
h3.step .step-num { color: var(--carnelian); font-weight: 400; }

.step-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.6rem;
  align-items: center;
  margin: 1.3rem 0 1.7rem;
  max-width: 56rem;
}
@media (max-width: 760px) {
  .step-grid { grid-template-columns: 1fr; }
}
.step-grid figure { margin: 0; }

tfoot th, tfoot td {
  font-family: var(--sans);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  padding: 0.5rem 0.9rem 0.5rem 0;
  border-top: 2px solid var(--ink);
}

.done-note {
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--carnelian);
  background: var(--wash);
  padding: 0.9rem 1.1rem;
  max-width: var(--measure);
  margin: 2rem 0;
  font-size: 0.97rem;
}

/* Cards (hardware) */

.card-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.1rem;
  margin: 1.6rem 0;
  max-width: 56rem;
}
@media (max-width: 760px) {
  .card-row { grid-template-columns: 1fr; }
}

.card {
  border: 1px solid var(--hairline);
  padding: 1.15rem 1.25rem 1.05rem;
  background: var(--paper);
}
.card h3 { margin: 0 0 0.5rem; font-size: 1.15rem; }
.card p { font-size: 0.94rem; margin-bottom: 0.8rem; }
.card .card-link {
  font-family: var(--sans);
  font-size: 0.74rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

/* Team */

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(9.5rem, 1fr));
  gap: 1.5rem 1rem;
  margin: 1.7rem 0;
  max-width: 60rem;
}

.person { text-align: center; }

.avatar {
  width: 5.4rem;
  height: 5.4rem;
  margin: 0 auto 0.6rem;
  border-radius: 50%;
  border: 1px solid var(--hairline);
  background: var(--wash);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  letter-spacing: 0.05em;
  color: var(--carnelian);
  overflow: hidden;
}
.avatar img { width: 100%; height: 100%; object-fit: cover; border: 0; }

.person .name { font-size: 0.95rem; line-height: 1.3; }
.person .name a { color: var(--ink); }
.person .name a:hover { color: var(--carnelian); }
.person .affil {
  font-family: var(--sans);
  font-size: 0.72rem;
  color: var(--slate);
  margin-top: 0.15rem;
}

/* BibTeX */

.bibtex-block {
  position: relative;
  background: var(--wash);
  border: 1px solid var(--hairline);
  max-width: 52rem;
  margin: 1.6rem 0;
}

.bibtex-block pre {
  margin: 0;
  padding: 1.2rem 1.3rem;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.8rem;
  line-height: 1.6;
}

.copy-btn {
  position: absolute;
  top: 0.6rem;
  right: 0.6rem;
  border: 1px solid var(--hairline);
  background: var(--paper);
  color: var(--slate);
  font-family: var(--sans);
  font-size: 0.68rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  padding: 0.35em 0.8em;
  cursor: pointer;
}
.copy-btn:hover { color: var(--carnelian); border-color: var(--carnelian); }

/* Footer */

.site-footer {
  margin-top: 3.5rem;
  border-top: 1px solid var(--hairline);
  padding: 1.7rem 0 2.6rem;
  font-family: var(--sans);
  font-size: 0.78rem;
  color: var(--slate);
}
.site-footer p { margin: 0.25rem 0; max-width: none; }
.site-footer a { color: var(--slate); text-decoration: underline; text-underline-offset: 3px; }
.site-footer a:hover { color: var(--carnelian); }
.site-footer svg { vertical-align: -0.12em; margin-right: 0.3em; }

/* Anchor offset below sticky nav */
section[id] { scroll-margin-top: 4.2rem; }