/* Hub layout polish — uses Bootstrap Lux tokens from quarto theme: lux */

:root {
  --hub-ink: var(--bs-gray-900, #1a1a1a);
  --hub-muted: var(--bs-body-color, #55595c);
  --hub-accent: var(--bs-primary, #1a1a1a);
  --hub-accent-muted: var(--bs-gray-700, #55595c);
  --hub-surface: var(--bs-secondary-bg, #f7f7f9);
  --hub-surface-alt: var(--bs-gray-100, #f8f9fa);
  --hub-card-border: var(--bs-border-color, #dee2e6);
  --hub-radius: 16px;
  --hub-shadow: 0 12px 40px rgba(var(--bs-primary-rgb, 26, 26, 26), 0.06);
  --hub-shadow-hover: 0 16px 48px rgba(var(--bs-primary-rgb, 26, 26, 26), 0.1);
}

/* Slightly calmer page background */
body.quarto-light #quarto-content {
  background: linear-gradient(
    180deg,
    var(--bs-body-bg, #fff) 0%,
    var(--hub-surface) 40%,
    var(--bs-body-bg, #fff) 100%
  );
}

#quarto-content main {
  max-width: 60rem;
  padding-top: 0.25rem;
}

/* --- Hero --- */
.hub-hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(
    125deg,
    var(--hub-surface) 0%,
    var(--bs-body-bg, #fff) 55%,
    var(--hub-surface-alt) 100%
  );
  border: 1px solid var(--hub-card-border);
  border-radius: var(--hub-radius);
  padding: 2rem 2rem 1.75rem;
  margin-bottom: 1.75rem;
  box-shadow: var(--hub-shadow);
}

.hub-hero::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 5px;
  border-radius: var(--hub-radius) 0 0 var(--hub-radius);
  background: var(--hub-accent);
}

.hub-hero > * {
  position: relative;
  padding-left: 0.35rem;
}

.hub-hero h1 {
  margin-top: 0;
  margin-bottom: 0.35rem;
  color: var(--hub-ink);
  font-weight: 700;
  font-size: clamp(1.85rem, 4.2vw, 2.45rem);
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.hub-hero .hub-tagline {
  font-size: 1.15rem;
  color: var(--hub-accent-muted);
  font-weight: 600;
  margin: 0 0 0.75rem;
}

.hub-hero .hub-tagline p {
  margin: 0;
}

.hub-lead {
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--hub-muted);
  max-width: 42rem;
  margin-bottom: 0;
}

/* --- Cards --- */
.hub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 1.35rem;
  margin: 1.75rem 0 2.25rem;
}

.hub-card {
  border: 1px solid var(--hub-card-border);
  border-radius: var(--hub-radius);
  padding: 1.35rem 1.4rem 1.4rem;
  background: var(--bs-body-bg, #fff);
  box-shadow: var(--hub-shadow);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.hub-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--hub-shadow-hover);
}

.hub-card h3 {
  margin-top: 0;
  color: var(--hub-ink);
  font-size: 1.12rem;
  font-weight: 650;
}

.hub-card ul {
  margin-bottom: 0;
  padding-left: 1.1rem;
}

.hub-card li {
  margin-bottom: 0.45rem;
  line-height: 1.5;
}

.hub-card a {
  font-weight: 550;
  color: var(--bs-link-color, var(--hub-accent));
}

.hub-muted {
  color: var(--hub-muted);
  font-size: 0.95rem;
  line-height: 1.55;
}

.hub-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--hub-accent-muted);
  background: var(--hub-surface);
  border: 1px solid var(--hub-card-border);
  border-radius: 999px;
  padding: 0.25rem 0.75rem;
  margin-bottom: 0.6rem;
}

.hub-pill .hub-inline-icon {
  width: 0.95em;
  height: 0.95em;
  margin-right: 0;
  opacity: 0.85;
}

/* --- Week section --- */
.hub-week {
  margin-top: 2.5rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--hub-card-border);
}

.hub-week h2 {
  color: var(--hub-ink);
  font-weight: 700;
  font-size: 1.35rem;
  margin-bottom: 0.5rem;
}

.hub-week-intro {
  color: var(--hub-muted);
  max-width: 48rem;
  line-height: 1.6;
  margin-bottom: 1rem;
}

.hub-week ul {
  line-height: 1.65;
}

.hub-week li strong {
  color: var(--hub-ink);
}

.hub-week h3 {
  color: var(--hub-ink);
  font-weight: 650;
  font-size: 1.05rem;
  margin-top: 1.25rem;
  margin-bottom: 0.35rem;
}

.hub-week h3:first-of-type {
  margin-top: 0.75rem;
}

/* --- Links --- */
#quarto-content main a {
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
  color: var(--bs-link-color, var(--hub-accent));
}

#quarto-content main a:hover {
  color: var(--bs-link-hover-color, var(--hub-accent));
}

/* Callouts on hub */
.callout.callout-style-default {
  border-radius: 12px;
}

/* “Start here” — Lux neutrals, not green tip wash */
.hub-start.callout-tip {
  border-color: var(--hub-card-border);
  background: linear-gradient(
    135deg,
    var(--hub-surface) 0%,
    var(--bs-body-bg, #fff) 100%
  );
}

.hub-start.callout-tip .callout-header {
  color: var(--hub-ink);
}

.hub-start.callout-tip .callout-body {
  color: var(--hub-muted);
}

/* Slightly roomier lists on the hub */
.hub-week ul li + li {
  margin-top: 0.35rem;
}

/* --- Inline icons (hub pages only) --- */
.hub-inline-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 1.15em;
  height: 1.15em;
  vertical-align: -0.2em;
  margin-right: 0.35em;
  color: var(--hub-accent-muted);
}

.hub-inline-icon svg {
  width: 100%;
  height: 100%;
  fill: currentColor;
}

img.hub-inline-icon {
  object-fit: contain;
  opacity: 0.82;
}

.hub-heading-icon {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.hub-heading-icon .hub-inline-icon {
  width: 1.25em;
  height: 1.25em;
  margin-right: 0;
}

.callout-header .hub-inline-icon {
  width: 1.05em;
  height: 1.05em;
  margin-right: 0.4em;
}

.hub-icon-accent {
  color: var(--hub-accent);
}

.hub-icon-soft {
  color: var(--hub-muted);
}

/* --- Partner logos (subtle footer strip) --- */
.hub-partners {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.25rem 1.75rem;
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--hub-card-border);
}

.hub-partners a {
  display: inline-flex;
  align-items: center;
  line-height: 0;
  opacity: 0.55;
  filter: grayscale(100%);
  transition: opacity 0.15s ease, filter 0.15s ease;
}

.hub-partners a:hover {
  opacity: 0.85;
  filter: grayscale(40%);
}

.hub-partners img {
  display: block;
  height: 1.65rem;
  width: auto;
  max-width: 7.5rem;
  object-fit: contain;
}

.hub-partners img.hub-partner-logo--wide {
  max-width: 5.5rem;
}