/* brutus style: the motifs. Every colour, light and dark, is set in conf.py. */

/* Page titles: a short temperature-gradient bar, as on the logo's isochrone. */
article h1::after {
  content: "";
  display: block;
  width: 4.5rem;
  height: 0.28rem;
  margin-top: 0.45rem;
  border-radius: 0.14rem;
  background: linear-gradient(90deg, var(--brutus-gold), var(--brutus-amber), var(--brutus-red));
}

article h2 {
  color: var(--color-brand-primary);
}

.sidebar-logo {
  max-width: 85%;
}

/* Landing page ------------------------------------------------------------- */

/* The landing page keeps its h1 for the page title but shows the logo instead. */
section:has(> .hero) > h1 {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

/* Hero: a faint model grid, densest where a posterior would peak. */
.hero {
  position: relative;
  isolation: isolate;
  text-align: center;
  padding: 2.5rem 1rem 2rem;
  margin-bottom: 1.5rem;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image: radial-gradient(circle, var(--brutus-dot) 1.6px, transparent 2.1px);
  background-size: 20px 20px;
  -webkit-mask-image: radial-gradient(ellipse 60% 70% at 55% 45%, #000 0%, transparent 75%);
  mask-image: radial-gradient(ellipse 60% 70% at 55% 45%, #000 0%, transparent 75%);
}
.hero img {
  width: min(520px, 92%);
  margin: 0 auto;
}
.hero-tagline {
  font-size: 1.3rem;
  line-height: 1.45;
  max-width: 36rem;
  margin: 1.4rem auto 1.6rem;
  color: var(--color-foreground-secondary);
}
.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
}
.hero-buttons p {
  margin: 0;
}
.hero .sd-btn {
  border-radius: 999px;
  padding: 0.45rem 1.2rem;
  font-weight: 600;
}

.sd-card-title {
  color: var(--color-brand-primary);
}

/* Numbered steps on the landing page. */
.steps ol {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
  gap: 1rem;
  margin: 1rem 0 1.5rem;
}
.steps li {
  margin: 0;
  padding: 0.9rem 1rem 1rem;
  border-top: 0.25rem solid var(--brutus-amber);
  background: var(--color-background-secondary);
  border-radius: 0 0 0.5rem 0.5rem;
  font-size: 0.95rem;
}
.steps li::before {
  content: counter(list-item);
  display: block;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--brutus-copper);
}

/* Schematics in docs/source/figures/: inline SVG, so they follow the theme. */
.figure-svg {
  margin: 1.5rem 0 2rem;
}
.figure-svg svg {
  display: block;
  width: 100%;
  height: auto;
}
.figure-svg:has(+ .figure-caption) {
  margin-bottom: 0.6rem;
}
.figure-caption {
  font-size: 0.9rem;
  color: var(--color-foreground-secondary);
  margin-bottom: 2rem;
}