@import url("https://fonts.googleapis.com/css2?family=Newsreader:opsz,wght@6..72,500;6..72,600&display=swap");

/* ============================================================
   Deep space palette: navy primary, gold from the logo's peak
   ============================================================ */
:root {
  --cn-night: #050915;            /* hero + header, both schemes */
  --cn-night-fg: #eef1ff;
  --cn-night-muted: #aab3d6;
  --cn-gold: #f2c94c;
  --cn-on-gold: #1a1500;
  --cn-display: "Newsreader", Georgia, serif;
}

[data-md-color-scheme="slate"] {
  --md-default-bg-color: #0c1020;
  --md-default-fg-color: rgba(230, 233, 245, 0.92);
  --md-default-fg-color--light: #9aa2c4;
  --md-default-fg-color--lighter: #5d6688;
  --md-default-fg-color--lightest: #232b48;
  --md-primary-fg-color: #14245e;
  --md-primary-fg-color--light: #2651a0;
  --md-primary-fg-color--dark: #0f1a45;
  --md-primary-bg-color: #ffffff;
  --md-accent-fg-color: var(--cn-gold);
  --md-accent-fg-color--transparent: rgba(242, 201, 76, 0.12);
  --md-typeset-a-color: #8fb4ff;
  --md-code-bg-color: #10162a;
  --md-code-fg-color: #dde3f7;
  --md-code-hl-keyword-color: #c6a7ff;
  --md-code-hl-string-color: #7fdcae;
  --md-code-hl-function-color: #8fb4ff;
  --md-code-hl-number-color: var(--cn-gold);
  --md-code-hl-comment-color: #6f789c;
  --cn-surface: #141a30;
  --cn-accent-text: var(--cn-gold);
}

[data-md-color-scheme="default"] {
  --md-primary-fg-color: #14245e;
  --md-primary-fg-color--light: #2651a0;
  --md-primary-fg-color--dark: #0f1a45;
  --md-primary-bg-color: #ffffff;
  --md-accent-fg-color: #9a7300;
  --md-accent-fg-color--transparent: rgba(154, 115, 0, 0.1);
  --md-typeset-a-color: #1f3fa8;
  --md-code-bg-color: #f3f4fa;
  --md-code-fg-color: #1a2035;
  --cn-surface: #f5f6fb;
  --cn-accent-text: #9a7300;
}

/* ============================================================
   Typography and header
   ============================================================ */
.md-typeset h1,
.md-typeset h2,
.md-typeset h3 {
  font-family: var(--cn-display);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--md-default-fg-color);
}

.md-header {
  background-color: var(--cn-night);
  color: var(--cn-night-fg);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06);
}

.md-tabs {
  background-color: var(--cn-night);
  color: var(--cn-night-fg);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06);
}

.md-tabs__link--active,
.md-tabs__link:hover {
  color: var(--cn-gold);
}

.md-header__title {
  font-family: var(--cn-display);
  font-weight: 600;
}

.md-header__button.md-logo {
  padding: 0.2rem;
}

.md-header__button.md-logo img {
  height: 2rem;
  width: 2rem;
}

.md-typeset code {
  border-radius: 4px;
}

.md-footer {
  font-size: 0.72rem;
}

/* ============================================================
   Hero: night sky, text left, logo right
   ============================================================ */
.cn-night {
  overflow: hidden;              /* keep the logo halo inside the band */
  color: var(--cn-night-fg);
  background:
    radial-gradient(1px 1px at 8% 20%, rgba(255, 255, 255, 0.8) 50%, transparent 51%),
    radial-gradient(1px 1px at 24% 74%, rgba(255, 255, 255, 0.55) 50%, transparent 51%),
    radial-gradient(1.5px 1.5px at 41% 12%, rgba(255, 255, 255, 0.9) 50%, transparent 51%),
    radial-gradient(1px 1px at 52% 88%, rgba(255, 255, 255, 0.5) 50%, transparent 51%),
    radial-gradient(1px 1px at 57% 40%, rgba(255, 255, 255, 0.6) 50%, transparent 51%),
    radial-gradient(1.5px 1.5px at 94% 18%, rgba(255, 255, 255, 0.85) 50%, transparent 51%),
    radial-gradient(1px 1px at 96% 78%, rgba(255, 255, 255, 0.6) 50%, transparent 51%),
    radial-gradient(1px 1px at 16% 48%, rgba(255, 255, 255, 0.45) 50%, transparent 51%),
    var(--cn-night);
}

.cn-hero {
  max-width: 61rem;
  margin: 0 auto;
  padding: 3.2rem 1.2rem 3.6rem;
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  gap: 2.4rem;
  align-items: center;
}

.cn-hero h1 {
  font-family: var(--cn-display);
  font-size: 2.6rem;
  line-height: 1.08;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 0.8rem;
  color: var(--cn-night-fg);
  text-wrap: balance;
}

.cn-hl {
  color: var(--cn-gold);
}

.cn-hero p {
  color: var(--cn-night-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  max-width: 44ch;
  margin: 0 0 1.3rem;
}

.cn-eyebrow {
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cn-accent-text);
  margin-bottom: 0.4rem;
}

.cn-night .cn-eyebrow {
  color: var(--cn-gold);
}

.cn-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.cn-btn {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.55rem 1.3rem;
  border: 0.1rem solid rgba(255, 255, 255, 0.4);
  border-radius: 7px;
  color: var(--cn-night-fg);
  transition: transform 140ms, box-shadow 140ms, background-color 140ms, border-color 140ms;
}

.cn-btn--primary {
  background-color: var(--cn-gold);
  border-color: var(--cn-gold);
  color: var(--cn-on-gold);
}

.cn-btn:hover,
.cn-btn:focus-visible {
  color: var(--cn-on-gold);
  background-color: var(--cn-gold);
  border-color: var(--cn-gold);
  transform: translateY(-1px);
  box-shadow: 0 6px 18px -8px rgba(242, 201, 76, 0.55);
}

.cn-pip {
  display: inline-block;
  margin-top: 1rem;
  font-family: var(--md-code-font-family);
  font-size: 0.68rem;
  color: var(--cn-night-muted);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 6px;
  padding: 0.3rem 0.6rem;
}

/* Logo with a halo that continues the circle's rim colour outward and fades into
   the night background. Stops are the rim colour sampled every 15° from logo.png
   (0deg = top, clockwise); the bright stretch at 105-135deg is where the blue
   mountains reach the edge. */
.cn-orb {
  position: relative;
  justify-self: center;
  width: min(19rem, 100%);
  aspect-ratio: 1;
}

.cn-orb::before {
  content: "";
  position: absolute;
  inset: -28%;
  border-radius: 50%;
  background: conic-gradient(
    #030f34 0deg, #031036 15deg, #041346 30deg, #051759 45deg, #021037 60deg,
    #021037 75deg, #041446 90deg, #094bd7 105deg, #202ebb 120deg, #3422b3 135deg,
    #021c5b 150deg, #02113c 165deg, #02113b 180deg, #011036 195deg, #021138 210deg,
    #031039 225deg, #051144 240deg, #071862 255deg, #05134b 270deg, #030f37 285deg,
    #030e33 300deg, #030e33 315deg, #030f34 330deg, #030f34 345deg, #030f34 360deg
  );
  -webkit-mask-image: radial-gradient(closest-side, #000 60%, transparent 100%);
  mask-image: radial-gradient(closest-side, #000 60%, transparent 100%);
  filter: blur(6px);
}

.cn-orb img {
  position: relative;
  display: block;
  width: 100%;
  height: 100%;
}

/* ============================================================
   Landing sections
   ============================================================ */
.cn-section {
  padding: 1.6rem 0;
}

.cn-section + .cn-section {
  border-top: 1px solid var(--md-default-fg-color--lightest);
}

.md-typeset .cn-section h2 {
  margin-top: 0;
}

/* Theory → Likelihood → Model → Sampler, on an orbit line like the logo's */
.cn-orbit {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.cn-orbit::before {
  content: "";
  position: absolute;
  left: 8%;
  right: 8%;
  top: 0.95rem;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, transparent, var(--cn-gold) 12%, var(--cn-gold) 88%, transparent);
  opacity: 0.6;
}

.cn-node {
  position: relative;
  display: grid;
  justify-items: center;
  text-align: center;
  gap: 0.2rem;
  min-width: 0;
}

.cn-node::before {
  content: "";
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  margin: 0.35rem 0 0.5rem;
  background: var(--md-default-bg-color);
  border: 3px solid var(--cn-gold);
  box-shadow: 0 0 0 4px var(--md-default-bg-color);
}

.cn-node b {
  font-family: var(--cn-display);
  font-size: 0.95rem;
}

.cn-node span {
  font-size: 0.72rem;
  color: var(--md-default-fg-color--light);
}

.md-typeset .cn-node code {
  background: none;
  padding: 0;
  font-size: 0.66rem;
  color: var(--cn-accent-text);
}

/* Feature cards that lift on hover (from cplots) */
.cn-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.8rem;
}

.cn-card {
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 9px;
  padding: 1rem 1.1rem;
  min-width: 0;
  transition: border-color 140ms, box-shadow 140ms, transform 140ms;
}

.cn-card:hover {
  border-color: var(--cn-accent-text);
  box-shadow: 0 6px 18px -6px rgba(0, 0, 0, 0.25);
  transform: translateY(-2px);
}

.md-typeset .cn-card h3 {
  margin: 0 0 0.3rem;
  font-size: 0.95rem;
}

.md-typeset .cn-card p {
  margin: 0;
  font-size: 0.76rem;
  color: var(--md-default-fg-color--light);
}

.cn-glyph {
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 7px;
  display: grid;
  place-items: center;
  margin-bottom: 0.6rem;
  background: var(--cn-surface);
  color: var(--cn-accent-text);
  font-family: var(--md-code-font-family);
  font-size: 0.68rem;
  font-weight: 600;
}

/* Likelihood chips */
.cn-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.md-typeset .cn-chip {
  display: inline-flex;
  align-items: baseline;
  font-size: 0.72rem;
  color: var(--md-default-fg-color);
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 999px;
  padding: 0.2rem 0.7rem;
  background: var(--cn-surface);
  transition: border-color 140ms, color 140ms, background-color 140ms, transform 140ms, box-shadow 140ms;
}

.md-typeset .cn-chip small {
  color: var(--md-default-fg-color--light);
  margin-left: 0.15rem;
}

/* Arrow slides in on hover to signal the chip leads somewhere */
.md-typeset .cn-chip::after {
  content: "→";
  display: inline-block;
  max-width: 0;
  opacity: 0;
  overflow: hidden;
  transform: translateX(-0.3rem);
  transition: max-width 140ms, opacity 140ms, transform 140ms, margin 140ms;
}

.md-typeset .cn-chip:hover,
.md-typeset .cn-chip:focus-visible {
  color: var(--md-default-fg-color);
  border-color: var(--cn-accent-text);
  background: var(--md-accent-fg-color--transparent);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px -6px rgba(0, 0, 0, 0.35);
}

.md-typeset .cn-chip:hover::after,
.md-typeset .cn-chip:focus-visible::after {
  max-width: 1em;
  opacity: 1;
  margin-left: 0.35rem;
  transform: none;
  color: var(--cn-accent-text);
}

/* Tabs: gold underline */
.md-typeset .tabbed-labels > label {
  font-size: 0.75rem;
}

.md-typeset .tabbed-set > input:checked + label,
.md-typeset .tabbed-labels > label:hover {
  color: var(--md-default-fg-color);
}

.md-typeset .tabbed-labels::before {
  background: var(--cn-gold);
}

/* ============================================================
   Phone width
   ============================================================ */
@media screen and (max-width: 47.5em) {
  .cn-hero {
    grid-template-columns: 1fr;
    padding-top: 2.2rem;
    gap: 1.6rem;
  }

  .cn-orb {
    width: 11rem;
    grid-row: 1;
  }

  .cn-hero h1 {
    font-size: 2rem;
  }

  .cn-orbit,
  .cn-cards {
    grid-template-columns: 1fr;
  }

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

  .cn-orbit::before {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .cn-card,
  .cn-btn,
  .md-typeset .cn-chip,
  .md-typeset .cn-chip::after {
    transition: none;
  }
}

/* Footer joins the night band */
.md-footer-meta {
  background-color: var(--cn-night);
}

/* Maths: MathJax inherits the text colour; bump size where the host font is small */
.cn-glyph mjx-container { font-size: 150% !important; }
.md-typeset .cn-chip small mjx-container { font-size: 118% !important; }