:root {
  --md-primary-fg-color: #0a1d36;
  --md-primary-fg-color--light: #12375f;
  --md-primary-fg-color--dark: #061326;
  --md-accent-fg-color: #ee7b29;
  --hub-blue: #45c8ff;
  --hub-orange: #ee7b29;
  --hub-navy: #07162a;
  --hub-panel: rgba(8, 33, 58, 0.045);
  --hub-border: rgba(19, 102, 151, 0.18);
}

[data-md-color-scheme="slate"] {
  --md-default-bg-color: #071321;
  --md-default-fg-color: #dbeaf4;
  --md-default-fg-color--light: #aac2d3;
  --md-code-bg-color: #0b1d2f;
  --md-typeset-a-color: #64d2ff;
  --hub-panel: rgba(79, 195, 247, 0.055);
  --hub-border: rgba(84, 207, 255, 0.22);
}

.md-header {
  background: linear-gradient(100deg, #061326, #0a2745 65%, #19324a);
  box-shadow: 0 1px 0 rgba(84, 207, 255, 0.2);
}

.md-tabs {
  background: #081a30;
}

.md-typeset h1,
.md-typeset h2,
.md-typeset h3 {
  font-weight: 750;
  letter-spacing: -0.025em;
}

.md-typeset h1 {
  color: var(--md-default-fg-color);
}

.md-typeset a:not(.md-button) {
  text-underline-offset: 0.18em;
}

.md-typeset .md-button {
  border-radius: 0.35rem;
}

.md-typeset .md-button--primary {
  background: linear-gradient(120deg, #ff8b35, #e86518);
  border-color: #ee7b29;
  color: #fff;
}

.hub-hero {
  position: relative;
  overflow: hidden;
  margin: 0 0 2.2rem;
  padding: clamp(2rem, 6vw, 4.6rem);
  border: 1px solid rgba(84, 207, 255, 0.24);
  border-radius: 0.7rem;
  background:
    radial-gradient(circle at 82% 18%, rgba(238, 123, 41, 0.22), transparent 28%),
    radial-gradient(circle at 5% 105%, rgba(69, 200, 255, 0.2), transparent 35%),
    linear-gradient(135deg, #061326 0%, #0a2846 62%, #10253b 100%);
  color: #eaf7ff;
  box-shadow: 0 1.2rem 3rem rgba(2, 16, 29, 0.2);
}

.hub-hero::before {
  position: absolute;
  inset: 0;
  content: "";
  pointer-events: none;
  opacity: 0.38;
  background-image:
    linear-gradient(rgba(84, 207, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(84, 207, 255, 0.08) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: linear-gradient(to right, transparent, #000 58%);
}

.hub-hero > * {
  position: relative;
  z-index: 1;
}

.hub-hero h1 {
  max-width: 16ch;
  margin: 0.25rem 0 0.85rem;
  color: #f5fbff;
  font-size: clamp(2.1rem, 5vw, 4.25rem);
  line-height: 0.98;
}

.hub-hero p {
  max-width: 62ch;
  color: #c8deeb;
  font-size: 1.02rem;
}

.hub-hero .md-button:not(.md-button--primary) {
  color: #eaf7ff;
  border-color: rgba(234, 247, 255, 0.5);
}

.eyebrow {
  color: #64d2ff;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.18em;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
  margin: 1rem 0 2rem;
}

.feature-card {
  min-height: 10rem;
  padding: 1.15rem 1.2rem;
  border: 1px solid var(--hub-border);
  border-radius: 0.55rem;
  background: var(--hub-panel);
  transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.feature-card:hover {
  transform: translateY(-2px);
  border-color: rgba(238, 123, 41, 0.55);
  box-shadow: 0 0.7rem 1.5rem rgba(3, 25, 42, 0.08);
}

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

.interactive-panel {
  margin: 1.3rem 0;
  padding: 1rem;
  border: 1px solid var(--hub-border);
  border-left: 3px solid var(--hub-orange);
  border-radius: 0.45rem;
  background: var(--hub-panel);
}

.interactive-heading {
  margin-bottom: 0.8rem;
  font-weight: 750;
  letter-spacing: -0.01em;
}

.interactive-panel label {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin: 0.25rem 0.65rem 0.45rem 0;
  font-size: 0.78rem;
  font-weight: 650;
}

.interactive-panel input,
.interactive-panel select,
.interactive-panel button {
  min-height: 2.2rem;
  border: 1px solid var(--hub-border);
  border-radius: 0.3rem;
  background: var(--md-default-bg-color);
  color: var(--md-default-fg-color);
  font: inherit;
}

.interactive-panel input,
.interactive-panel select {
  max-width: 9rem;
  padding: 0.35rem 0.5rem;
}

.interactive-panel input[type="range"] {
  width: min(22rem, 60vw);
  max-width: none;
  accent-color: var(--hub-orange);
}

.interactive-panel input[type="checkbox"] {
  min-height: 1rem;
  accent-color: var(--hub-orange);
}

.interactive-panel button {
  padding: 0.4rem 0.7rem;
  cursor: pointer;
  border-color: rgba(238, 123, 41, 0.52);
}

.interactive-panel button:hover,
.interactive-panel button:focus-visible {
  color: #fff;
  background: var(--hub-orange);
  outline: 2px solid rgba(238, 123, 41, 0.25);
  outline-offset: 2px;
}

.interactive-panel output {
  display: block;
  min-height: 1.5rem;
  margin-top: 0.75rem;
  color: var(--md-default-fg-color);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.78rem;
}

.training-stepper ol {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.4rem;
  padding: 0;
  counter-reset: training-step;
  list-style: none;
}

.training-stepper li {
  padding: 0.65rem;
  border: 1px solid var(--hub-border);
  border-radius: 0.35rem;
  color: var(--md-default-fg-color--light);
  font-size: 0.68rem;
  text-align: center;
}

.training-stepper li.is-active {
  color: #fff;
  background: linear-gradient(120deg, #0f4f74, #0a789e);
  border-color: var(--hub-blue);
}

.stepper-actions {
  display: flex;
  gap: 0.5rem;
}

.curve-lab canvas {
  display: block;
  width: 100%;
  height: auto;
  margin-top: 0.6rem;
  border: 1px solid var(--hub-border);
  border-radius: 0.35rem;
  background: #071321;
}

.curve-lab small {
  color: var(--md-default-fg-color--light);
}

.kernel-controls {
  display: flex;
  align-items: end;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.kernel-stage {
  display: grid;
  grid-template-columns: 1.15fr 0.75fr 0.75fr;
  gap: 1rem;
  align-items: start;
  margin-top: 1rem;
}

.matrix-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 2px;
  margin-top: 0.35rem;
}

.matrix-grid.kernel-grid,
.matrix-grid.output-grid {
  grid-template-columns: repeat(3, 1fr);
}

.matrix-cell {
  display: grid;
  min-height: 2rem;
  place-items: center;
  border-radius: 0.15rem;
  background: rgba(69, 200, 255, var(--cell-alpha, 0.08));
  color: var(--md-default-fg-color);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.65rem;
}

.mermaid {
  margin: 1.2rem 0;
  text-align: center;
}

.md-typeset details.note {
  margin-top: 0.85rem;
  border-color: var(--hub-border);
}

.md-typeset details.note > summary {
  font-weight: 700;
}

.md-typeset .topic-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.md-typeset .topic-card {
  padding: 1.1rem 1.15rem;
  border: 1px solid var(--hub-border);
  border-radius: 0.55rem;
  background: linear-gradient(145deg, rgba(69, 200, 255, 0.07), transparent 70%);
}

.md-typeset .topic-card strong {
  display: block;
  margin-bottom: 0.45rem;
  color: var(--md-default-fg-color);
  font-size: 1.02rem;
}

@media (max-width: 760px) {
  .feature-grid,
  .kernel-stage,
  .topic-grid {
    grid-template-columns: 1fr;
  }

  .hub-hero {
    padding: 2rem 1.2rem;
  }

  .training-stepper ol {
    grid-template-columns: 1fr;
  }

  .training-stepper li {
    text-align: left;
  }

  .matrix-grid {
    max-width: 17rem;
  }

  .interactive-panel label:not(.check-row) {
    display: flex;
    justify-content: space-between;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}