@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400&display=swap");

:root {
  color-scheme: dark;
  --bg: #2a2d2c;
  --panel: #171a19;
  --panel-alt: #202423;
  --ink: #d8ddd8;
  --muted: #8e9893;
  --line: #444b48;
  --soft-line: #2f3633;
  --accent: #78b7a6;
  --accent-dark: #a3d7c6;
  --code-bg: #2b3230;
  --heat-blue: #008de0;
  --heat-yellow: #ffe448;
  --heat-red: #df0000;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 86px;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 14px;
  line-height: 1.52;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  color: var(--accent-dark);
  text-decoration: underline;
}

a:focus-visible {
  outline: 1px solid var(--accent);
  outline-offset: 3px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 60px;
  padding: 0 28px;
  background: rgba(36, 39, 38, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.brand {
  color: var(--ink);
  font-family: "IBM Plex Mono", Monaco, Menlo, "Courier New", monospace;
  font-size: 17px;
  font-weight: 400;
  letter-spacing: 0;
}

.brand:hover {
  text-decoration: none;
}

.top-nav {
  display: flex;
  gap: 22px;
  align-items: center;
  font-size: 12px;
}

.top-nav a {
  color: var(--muted);
  padding: 4px 0;
}

.top-nav a:hover {
  color: var(--accent-dark);
}

.page-shell {
  display: grid;
  grid-template-columns: minmax(0, 900px) 220px;
  gap: 26px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 26px 24px 64px;
}

.content {
  min-width: 0;
  padding: 26px 34px 40px;
  background: var(--panel);
  border: 1px solid var(--soft-line);
  border-radius: 0;
}

.toc {
  position: sticky;
  top: 88px;
  align-self: start;
  max-height: calc(100vh - 110px);
  overflow: auto;
  padding-left: 20px;
  padding-right: 8px;
  border-left: 1px solid var(--line);
}

.toc h2 {
  margin: 0 0 9px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.toc-section + .toc-section {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.toc a {
  display: block;
  padding: 5px 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.25;
}

.content h1 {
  margin: 0 0 16px;
  font-size: clamp(25px, 4vw, 38px);
  line-height: 1.12;
  letter-spacing: 0;
}

.content h1.home-title {
  margin-bottom: 0;
  font-family: "IBM Plex Mono", Monaco, Menlo, "Courier New", monospace;
  font-size: clamp(36px, 5vw, 52px);
  font-weight: 400;
  line-height: 1.05;
}

.content .home-title-rule {
  margin: 20px 0 24px;
  border: 0;
  border-top: 1px solid var(--line);
}

.content h2 {
  margin-top: 32px;
  padding-top: 16px;
  scroll-margin-top: 86px;
  border-top: 1px solid var(--soft-line);
  font-size: 20px;
  line-height: 1.22;
  letter-spacing: 0;
}

.content h3 {
  margin-top: 24px;
  scroll-margin-top: 86px;
  font-size: 16px;
}

.content p,
.content li {
  color: #c6cdc8;
}

.content p {
  margin: 0 0 0.95rem;
}

.content ul,
.content ol {
  padding-left: 1.35rem;
}

.content li + li {
  margin-top: 0.25rem;
}

.content .bibliography {
  margin-top: 14px;
}

.content .bib-entry {
  margin-bottom: 1.05rem;
  padding-left: 1.35rem;
  text-indent: -1.35rem;
}

.content .bib-entry a {
  text-indent: 0;
}

.content strong {
  color: #9cdcfe;
  font-weight: 400;
}

.content code {
  padding: 0.13rem 0.36rem;
  background: var(--code-bg);
  border: 1px solid #3b4542;
  border-radius: 0;
  color: #eef4ef;
  font-family: Menlo, Monaco, "Courier New", monospace;
  font-size: 0.9em;
  font-weight: 400;
}

.content pre {
  overflow: auto;
  padding: 16px;
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-radius: 0;
  font-family: Menlo, Monaco, "Courier New", monospace;
}

.content pre code {
  padding: 0;
  background: transparent;
  border: 0;
  font-family: inherit;
}

.content figure {
  margin: 28px 0;
}

.content img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--soft-line);
}

.content figcaption {
  margin-top: 8px;
  color: var(--muted);
  font-size: 12px;
}

.callout {
  margin: 22px 0;
  padding: 14px 16px;
  background: var(--panel-alt);
  border: 1px solid var(--line);
}

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

.color-key {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin: 20px 0;
}

.color-key-item {
  min-width: 0;
  padding: 9px;
  background: var(--panel-alt);
  border: 1px solid var(--line);
}

.color-key-item p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.4;
}

.color-chip {
  display: block;
  height: 22px;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.color-front {
  background: #e64887;
}

.color-left {
  background: #bb8100;
}

.color-rear {
  background: #00b091;
}

.color-right {
  background: #5f7eff;
}

.color-ramp {
  height: 18px;
  margin-top: 20px;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.heat-ramp {
  background-color: #0a185e;
  background-image: linear-gradient(90deg, #0a185e 0%, #0a185e 2%, #0092e8 22%, #ffe82a 48%, #ff540c 72%, #ee0000 100%);
  border-left-color: #0a185e;
}

.color-ramp-labels {
  display: flex;
  justify-content: space-between;
  margin: 4px 0 18px;
  color: var(--muted);
  font-family: Menlo, Monaco, "Courier New", monospace;
  font-size: 11px;
  text-transform: uppercase;
}

.related-links {
  margin: 22px 0;
  padding: 14px 16px;
  background: #232827;
  border: 1px solid var(--line);
}

.related-links h2,
.related-links h3 {
  margin: 0 0 8px;
  padding: 0;
  border: 0;
  color: var(--muted);
  font-family: Menlo, Monaco, "Courier New", monospace;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.related-links ul {
  margin: 0;
}

.related-links li {
  font-size: 13px;
}

.doc-graphic {
  overflow: auto;
  background: #111413;
  border: 1px solid var(--line);
}

.doc-graphic svg,
.doc-graphic img {
  display: block;
  width: 100%;
  min-width: 680px;
  height: auto;
  border: 0;
}

.media-lightbox-trigger {
  display: block;
  width: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: inherit;
  cursor: zoom-in;
}

.media-lightbox-trigger img {
  transition: filter 160ms ease;
}

.media-lightbox-trigger:hover img,
.media-lightbox-trigger:focus-visible img {
  filter: brightness(1.08);
}

.media-lightbox {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding: 56px 92px;
  background: rgba(12, 14, 14, 0.90);
  box-shadow: inset 0 0 0 9999px rgba(190, 198, 193, 0.035);
}

.media-lightbox[aria-hidden="false"] {
  display: flex;
}

.media-lightbox img {
  display: block;
  width: auto;
  max-width: calc(100vw - 184px);
  max-height: calc(100vh - 112px);
  object-fit: contain;
  border: 1px solid #55615d;
  background: #050606;
  box-shadow: 0 18px 70px rgba(0, 0, 0, 0.55);
}

.media-lightbox-close {
  position: fixed;
  top: 18px;
  right: 24px;
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  padding: 0;
  border: 1px solid #55615d;
  border-radius: 0;
  background: #111413;
  color: var(--ink);
  font-family: Menlo, Monaco, "Courier New", monospace;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
}

.media-lightbox-open {
  overflow: hidden;
}

.compact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 14px 0 18px;
  border-top: 1px solid var(--soft-line);
  border-bottom: 1px solid var(--soft-line);
}

.compact-grid > div {
  padding: 10px 0;
}

.compact-grid h3 {
  margin-top: 0;
  font-size: 14px;
}

.compact-grid p {
  margin-bottom: 0;
  font-size: 13px;
}

.readout-table {
  width: 100%;
  margin: 18px 0;
  border-collapse: collapse;
  border: 1px solid var(--line);
  font-family: Menlo, Monaco, "Courier New", monospace;
  font-size: 12px;
}

.readout-table th,
.readout-table td {
  padding: 8px 10px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.readout-table th {
  color: var(--ink);
  background: var(--panel-alt);
  font-weight: 400;
}

.readout-table td {
  color: #c6cdc8;
}

.page-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid var(--soft-line);
}

.page-nav-link {
  display: block;
  padding: 12px;
  border: 1px solid var(--line);
  background: var(--panel-alt);
  color: var(--ink);
}

.page-nav-link span {
  display: block;
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 11px;
}

.page-nav-link.next {
  text-align: right;
}

@media (max-width: 980px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
    padding: 14px 18px;
  }

  .top-nav {
    flex-wrap: wrap;
    gap: 10px 16px;
  }

  .page-shell {
    display: block;
    padding: 18px 14px 48px;
  }

  .toc {
    position: static;
    max-height: none;
    margin-top: 18px;
    padding-top: 16px;
    border-top: 1px solid var(--line);
    border-left: 0;
    padding-left: 0;
  }

  .content {
    padding: 22px 20px 34px;
  }
}

@media (max-width: 700px) {
  .compact-grid,
  .page-nav {
    grid-template-columns: 1fr;
  }

  .color-key {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .doc-graphic svg,
  .doc-graphic img {
    min-width: 620px;
  }

  .media-lightbox {
    align-items: center;
    padding: 44px 18px;
  }

  .media-lightbox img {
    max-width: calc(100vw - 36px);
    max-height: calc(100vh - 88px);
  }
}