@import url("https://fonts.googleapis.com/css2?family=Open+Sans:wght@300;400;500;600;700&family=Poppins:wght@400;500;600;700;800&family=Roboto+Mono:wght@400;500;600;700&display=swap");

:root {
  color-scheme: light;
  --site-ink: #1a1a1a;
  --site-muted: #838485;
  --site-accent: #838485;
  --site-accent-dark: #1a1a1a;
  --site-paper: #f2f5f8;
  --site-paper-deep: #e7eaed;
  --site-shadow: rgba(0, 0, 0, 0.16);
  --site-shell: #000000;
  --site-shell-deep: #000000;
  --site-border: rgba(0, 0, 0, 0.12);
  --site-border-soft: rgba(0, 0, 0, 0.08);
}

body.theme-dark {
  color-scheme: dark;
  --site-ink: #ffffff;
  --site-muted: rgba(255, 255, 255, 0.65);
  --site-accent: rgba(255, 255, 255, 0.7);
  --site-accent-dark: #ffffff;
  --site-paper: #000000;
  --site-paper-deep: #111214;
  --site-shadow: rgba(0, 0, 0, 0.6);
  --site-shell: #000000;
  --site-shell-deep: #000000;
  --site-border: rgba(255, 255, 255, 0.18);
  --site-border-soft: rgba(255, 255, 255, 0.1);
}

html,
body {
  font-family: "Open Sans", "Helvetica Neue", Arial, sans-serif;
  color: var(--site-ink);
  background: var(--site-paper);
  min-height: 100vh;
  overscroll-behavior: none;
  transition: background-color 0.15s ease-out, color 0.15s ease-out;
}

html {
  height: 100%;
  overscroll-behavior: none;
}

body {
  height: 100%;
}

.site-header {
  background: var(--site-shell);
  color: #f5f5f5;
}

.site-header-bar {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.site-header-links {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  font-family: "Roboto Mono", monospace;
  font-size: 0.8rem;
}

.site-header-links a {
  color: rgba(255, 255, 255, 0.75) !important;
}

.site-header-links a:hover {
  color: #ffffff !important;
}

.theme-toggle-btn {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #fff;
  border-radius: 2em;
  padding: 0.3em 0.9em;
  font-family: "Roboto Mono", monospace;
  font-size: 0.78rem;
  cursor: pointer;
  line-height: 1.4;
}

.theme-toggle-btn:hover {
  border-color: #fff;
}

.site-title {
  font-family: "Poppins", "Helvetica Neue", Arial, sans-serif;
  font-weight: 700;
  font-size: 1.3rem;
  letter-spacing: 0.01em;
  color: #ffffff !important;
}

.site-subtitle {
  font-family: "Open Sans", "Helvetica Neue", Arial, sans-serif;
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.75);
}

main {
  padding-bottom: 4rem;
}

.content-card {
  background: var(--site-paper);
  border-radius: 4px;
  padding: 2.75rem 3rem;
  box-shadow: 0 22px 55px var(--site-shadow);
  border: 1px solid var(--site-border);
  position: relative;
}

.content-card::before {
  content: none;
}

.home-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 42%);
  align-items: center;
  gap: clamp(2rem, 5vw, 4rem);
  margin: -0.75rem 0 3rem;
  padding: 0.75rem 0 3rem;
  border-bottom: 1px solid var(--site-border);
}

.home-hero-copy {
  position: relative;
  z-index: 1;
}

.home-kicker {
  margin: 0 0 0.75rem;
  color: var(--site-muted);
  font-family: "Roboto Mono", monospace;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  line-height: 1.4;
  text-transform: uppercase;
}

.home-hero h1 {
  margin-bottom: 1.25rem;
  font-size: clamp(3rem, 7vw, 5.5rem);
  line-height: 0.92;
  font-family: "Poppins", "Helvetica Neue", Arial, sans-serif;
  font-weight: 700;
}

.home-standfirst {
  max-width: 28rem;
  margin: 0;
  color: var(--site-muted);
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  font-style: italic;
  line-height: 1.55;
}

.home-hero-art {
  margin: 0;
  padding: 0.6rem;
  background: var(--site-paper-deep);
  border: 1px solid var(--site-border);
  border-radius: 4px;
  box-shadow: 0 20px 45px var(--site-shadow);
}

.home-hero-art img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 2px;
}

.home-hero-art figcaption {
  margin: 0.5rem 0 0.1rem;
  color: var(--site-muted);
  font-family: "Roboto Mono", monospace;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-align: center;
  text-transform: uppercase;
}

.media-hero {
  margin: 1.4rem 0 2rem;
}

.media-hero img {
  width: 100%;
  height: auto;
  border-radius: 4px;
  border: 1px solid var(--site-border);
  box-shadow: 0 18px 40px var(--site-shadow);
  display: block;
}

.media-float-right,
.media-float-left {
  max-width: 320px;
  margin: 0.35rem 0 1rem 1.4rem;
}

.media-float-left {
  float: left;
  margin: 0.35rem 1.4rem 1rem 0;
}

.media-float-right {
  float: right;
}

.media-float-right img,
.media-float-left img,
.media-diagram img {
  width: 100%;
  height: auto;
  border-radius: 4px;
  border: 1px solid var(--site-border);
  background: var(--site-paper-deep);
}

.media-diagram {
  margin: 1.6rem 0 2rem;
}

figcaption {
  font-family: "Roboto Mono", monospace;
  font-size: 0.85rem;
  color: var(--site-muted);
  margin-top: 0.4rem;
}

h1,
h2,
h3 {
  font-family: "Poppins", "Helvetica Neue", Arial, sans-serif;
  color: var(--site-ink);
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(2rem, 2.7vw, 2.8rem);
  margin-bottom: 1rem;
}

h2 {
  font-size: clamp(1.45rem, 1.9vw, 1.85rem);
  margin-top: 2.6rem;
  margin-bottom: 1rem;
}

h3 {
  font-size: clamp(1.15rem, 1.35vw, 1.4rem);
  margin-top: 2.1rem;
  margin-bottom: 0.75rem;
}

p {
  line-height: 1.75;
  color: var(--site-ink);
}

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

a:hover {
  color: var(--site-ink);
  text-decoration: underline;
}

.toc {
  background: var(--site-paper-deep);
  border: 1px solid var(--site-border);
}

.toc-title {
  font-family: "Roboto Mono", monospace;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
  margin-bottom: 0.75rem;
  color: var(--site-muted);
}

.toc-list {
  list-style: none;
  padding-left: 0;
  margin: 0;
  display: grid;
  gap: 0.35rem;
}

.toc-level-3 {
  padding-left: 1rem;
  font-size: 0.95rem;
}

.content-card > nav {
  font-family: "Roboto Mono", monospace;
  font-size: 0.9rem;
}

.toc-page-list,
.toc-section-list {
  list-style: none;
  padding-left: 0;
  margin: 0 0 1.5rem 0;
  display: grid;
  gap: 0.5rem;
}

.toc-page-list > li {
  padding: 0.85rem 1.1rem;
  border-radius: 4px;
  background: var(--site-paper-deep);
  border: 1px solid var(--site-border-soft);
}

.toc-section-list {
  margin-top: 0.5rem;
  padding-left: 0.75rem;
  gap: 0.35rem;
}

.toc-section-l3 {
  padding-left: 1rem;
  font-size: 0.95rem;
}

footer {
  background: var(--site-shell);
  color: rgba(255, 255, 255, 0.65);
  font-family: "Roboto Mono", monospace;
  font-size: 0.85rem;
}

@media (max-width: 768px) {
  .content-card {
    padding: 1.8rem 1.6rem;
    border-radius: 4px;
  }

  .media-float-right,
  .media-float-left {
    float: none;
    max-width: 100%;
    margin: 1rem 0 1.4rem;
  }

  .home-hero {
    grid-template-columns: 1fr;
    gap: 1.75rem;
    margin-top: -0.25rem;
    padding-bottom: 2.25rem;
  }

  .home-hero-copy {
    text-align: center;
  }

  .home-standfirst {
    margin-inline: auto;
  }

  .home-hero-art {
    width: min(100%, 430px);
    margin-inline: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
  }
}