:root {
  --tc-indigo: #4338ca;
  --tc-cyan: #0e7490;
  --tc-amber: #b45309;
  --tc-focus: #92400e;
  --tc-ink: #172554;
}

[data-md-color-scheme="default"] {
  --md-primary-fg-color: var(--tc-indigo);
  --md-accent-fg-color: var(--tc-amber);
}

[data-md-color-scheme="slate"] {
  --tc-cyan: #67e8f9;
  --tc-amber: #fbbf24;
  --tc-focus: #fbbf24;
  --md-accent-fg-color: var(--tc-amber);
}

.md-header {
  background: linear-gradient(105deg, #312e81, #4338ca 58%, #0e7490);
}

.tc-hero {
  margin: 0 0 2rem;
  padding: clamp(1.5rem, 5vw, 3.5rem);
  border: 1px solid color-mix(in srgb, var(--tc-indigo), transparent 72%);
  border-radius: 1.2rem;
  background:
    radial-gradient(circle at 90% 15%, rgb(8 145 178 / 18%), transparent 34%),
    linear-gradient(135deg, rgb(67 56 202 / 12%), rgb(255 255 255 / 3%));
}

.tc-hero img {
  display: block;
  width: min(10rem, 38vw);
  margin: 0 auto 1rem;
  filter: drop-shadow(0 0.8rem 1.2rem rgb(30 41 59 / 18%));
}

.tc-hero h1,
.tc-hero p {
  text-align: center;
}

.tc-hero h1 {
  margin-bottom: 0.4rem;
  font-weight: 750;
  letter-spacing: -0.035em;
}

.tc-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  justify-content: center;
  margin-top: 1.3rem;
}

.tc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1rem;
  margin: 1rem 0 2rem;
}

.tc-card {
  padding: 1.15rem 1.25rem;
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 0.8rem;
  background: var(--md-default-bg-color);
  box-shadow: 0 0.35rem 1.1rem rgb(15 23 42 / 7%);
}

.tc-card h2,
.tc-card h3 {
  margin-top: 0;
}

.tc-card--proved {
  border-top: 0.3rem solid #059669;
}

.tc-card--boundary {
  border-top: 0.3rem solid var(--tc-amber);
}

.tc-kicker {
  color: var(--tc-cyan);
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.md-typeset code {
  border-radius: 0.28rem;
}

.md-typeset a:focus-visible,
.md-button:focus-visible {
  outline: 0.18rem solid var(--tc-focus);
  outline-offset: 0.16rem;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}