/* ==========================================================================
   polars-anta Custom Institutional Theme (GitHub Dark #0D1117 & Polars #1D7AFC)
   ========================================================================== */

:root {
  --anta-blue: #1D7AFC;
  --anta-blue-light: #388BFD;
  --anta-blue-glow: rgba(29, 122, 252, 0.14);
  --anta-gh-dark: #0D1117;
  --anta-gh-card: #161B22;
  --anta-gh-border: #30363D;
}

[data-md-color-scheme="slate"] {
  --md-default-bg-color: #0D1117;
  --md-default-bg-color--light: #161B22;
  --md-primary-fg-color: #0D1117;
  --md-primary-fg-color--light: #161B22;
  --md-primary-fg-color--dark: #090C10;
  --md-accent-fg-color: #388BFD;
  --md-typeset-a-color: #388BFD;
}

[data-md-color-scheme="default"] {
  --md-primary-fg-color: #0D1117;
  --md-primary-fg-color--light: #161B22;
  --md-primary-fg-color--dark: #090C10;
  --md-accent-fg-color: #1D7AFC;
  --md-typeset-a-color: #1D7AFC;
}

/* Ensure all generic Material buttons remain visible in dark mode despite dark primary header */
[data-md-color-scheme="slate"] .md-typeset .md-button {
  color: #E6EDF3;
  border-color: rgba(56, 139, 253, 0.52);
}

/* Header & Navigation Tabs unified to GitHub Dark #0D1117 so Polars Blue logo pops */
.md-header {
  background-color: #0D1117 !important;
  color: #FFFFFF !important;
  border-bottom: 1px solid rgba(48, 54, 61, 0.85);
}

.md-tabs {
  background-color: #0D1117 !important;
  color: #FFFFFF !important;
  border-bottom: 1px solid rgba(48, 54, 61, 0.7);
}

.md-header__button.md-logo img,
.md-header__button.md-logo svg {
  height: 2.15rem;
  width: auto;
  filter: drop-shadow(0 0 6px rgba(29, 122, 252, 0.25));
  transition: transform 0.2s ease;
}

.md-header__button.md-logo:hover img {
  transform: scale(1.06);
}

/* Hide redundant default H1 on Overview landing page */
.anta-hero-wrapper {
  text-align: center;
  margin-top: -0.5rem;
  margin-bottom: 2rem;
}

.anta-hero-banner {
  border-radius: 14px;
  overflow: hidden;
  background-color: #0D1117;
  border: 1px solid rgba(48, 54, 61, 0.8);
  box-shadow: 0 12px 32px -8px rgba(0, 0, 0, 0.45);
  margin-bottom: 1.4rem;
}

.anta-hero-banner img {
  display: block;
  width: 100%;
  height: auto;
}

.anta-hero-title {
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.45;
  margin: 0.75rem auto 0.6rem auto;
  max-width: 54rem;
  letter-spacing: -0.01em;
}

.anta-hero-subtitle {
  font-size: 0.96rem;
  opacity: 0.86;
  max-width: 50rem;
  margin: 0 auto 1.2rem auto;
  line-height: 1.6;
}

.anta-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.4rem;
  margin: 1rem 0 1.4rem 0;
}

.anta-badges img {
  height: 20px;
}

.anta-cta-group {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1.2rem;
}

.md-typeset .md-button.anta-btn-primary {
  background: linear-gradient(180deg, #2F81F7 0%, #1D7AFC 100%) !important;
  border: 1px solid #388BFD !important;
  color: #FFFFFF !important;
  border-radius: 8px !important;
  padding: 0.55rem 1.3rem !important;
  font-size: 0.84rem !important;
  font-weight: 600 !important;
  box-shadow: 0 4px 14px rgba(29, 122, 252, 0.32);
  transition: all 0.2s ease !important;
}

.md-typeset .md-button.anta-btn-primary:hover {
  background: linear-gradient(180deg, #388BFD 0%, #2F81F7 100%) !important;
  border-color: #58A6FF !important;
  color: #FFFFFF !important;
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(29, 122, 252, 0.42);
}

.md-typeset .md-button.anta-btn-secondary {
  border-radius: 8px !important;
  padding: 0.55rem 1.2rem !important;
  font-size: 0.84rem !important;
  font-weight: 600 !important;
  color: #0F172A !important;
  background-color: #FFFFFF !important;
  border: 1px solid rgba(29, 122, 252, 0.45) !important;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.05);
  transition: all 0.2s ease !important;
}

.md-typeset .md-button.anta-btn-secondary:hover {
  color: #1D7AFC !important;
  background-color: rgba(29, 122, 252, 0.08) !important;
  border-color: #1D7AFC !important;
  transform: translateY(-1px);
}

[data-md-color-scheme="slate"] .md-typeset .md-button.anta-btn-secondary {
  color: #E6EDF3 !important;
  background-color: #161B22 !important;
  border: 1px solid rgba(56, 139, 253, 0.52) !important;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
}

[data-md-color-scheme="slate"] .md-typeset .md-button.anta-btn-secondary:hover {
  color: #FFFFFF !important;
  background-color: rgba(56, 139, 253, 0.16) !important;
  border-color: #58A6FF !important;
  box-shadow: 0 4px 14px rgba(56, 139, 253, 0.22);
}

/* 4 Key Metric Cards Strip — Always 4-across on desktop, 2x2 on tablet/mobile */
.anta-metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.75rem;
  margin: 1.6rem 0 2.1rem 0;
}

@media screen and (max-width: 768px) {
  .anta-metrics-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media screen and (max-width: 420px) {
  .anta-metrics-grid {
    grid-template-columns: 1fr;
  }
}

.anta-metric-card {
  padding: 0.95rem 0.6rem;
  border-radius: 10px;
  border: 1px solid rgba(29, 122, 252, 0.22);
  background: linear-gradient(180deg, rgba(29, 122, 252, 0.06) 0%, rgba(29, 122, 252, 0.015) 100%);
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

[data-md-color-scheme="slate"] .anta-metric-card {
  background: linear-gradient(180deg, rgba(22, 27, 34, 0.95) 0%, rgba(13, 17, 23, 0.95) 100%);
  border-color: rgba(56, 139, 253, 0.28);
}

.anta-metric-card:hover {
  transform: translateY(-2px);
  border-color: #1D7AFC;
  box-shadow: 0 6px 16px -4px rgba(29, 122, 252, 0.18);
}

[data-md-color-scheme="slate"] .anta-metric-card:hover {
  border-color: #58A6FF;
  box-shadow: 0 6px 18px -4px rgba(56, 139, 253, 0.25);
}

.anta-metric-value {
  font-size: 1.55rem;
  font-weight: 800;
  color: #1D7AFC;
  line-height: 1.15;
  margin-bottom: 0.3rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

[data-md-color-scheme="slate"] .anta-metric-value {
  color: #388BFD;
}

.anta-metric-label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.035em;
  color: #1E293B;
  white-space: nowrap;
  line-height: 1.3;
}

[data-md-color-scheme="slate"] .anta-metric-label {
  color: #E6EDF3;
}

.anta-metric-desc {
  font-size: 0.71rem;
  color: #64748B;
  margin-top: 0.18rem;
  white-space: nowrap;
  line-height: 1.3;
}

[data-md-color-scheme="slate"] .anta-metric-desc {
  color: #8B949E;
}

/* 2x2 Quantitative Pillar Grid */
.anta-pillars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
  margin: 1.25rem 0 2rem 0;
}

.anta-pillar-card {
  padding: 1.2rem 1.25rem;
  border-radius: 12px;
  border: 1px solid rgba(148, 163, 184, 0.22);
  background: rgba(22, 27, 34, 0.03);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

[data-md-color-scheme="slate"] .anta-pillar-card {
  background: #161B22;
  border-color: #30363D;
}

.anta-pillar-card:hover {
  border-color: #1D7AFC;
  box-shadow: 0 6px 20px -6px rgba(29, 122, 252, 0.2);
}

.anta-pillar-title {
  font-size: 0.98rem;
  font-weight: 700;
  color: #1D7AFC;
  margin-bottom: 0.45rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

[data-md-color-scheme="slate"] .anta-pillar-title {
  color: #388BFD;
}

.anta-pillar-body {
  font-size: 0.84rem;
  line-height: 1.55;
  margin-bottom: 0.65rem;
}

.anta-pillar-links {
  font-size: 0.78rem;
  font-weight: 600;
}

/* Math Equation Display Styling */
div.arithmatex {
  overflow-x: auto;
  overflow-y: hidden;
  padding: 0.65rem 1rem;
  margin: 0.85rem 0;
  border-radius: 8px;
  background: rgba(29, 122, 252, 0.04);
  border-left: 3px solid #1D7AFC;
}

[data-md-color-scheme="slate"] div.arithmatex {
  background: rgba(22, 27, 34, 0.85);
  border-left: 3px solid #388BFD;
}