:root {
  --learn-bg: #030303;
  --learn-bg-2: #080808;
  --learn-panel: rgba(12, 12, 12, 0.92);
  --learn-panel-soft: rgba(20, 20, 20, 0.78);
  --learn-line: rgba(255, 255, 255, 0.13);
  --learn-line-strong: rgba(255, 255, 255, 0.34);
  --learn-text: #f4f4f4;
  --learn-muted: #a4a4a4;
  --learn-dim: #6f6f6f;
  --learn-accent: #ffffff;
  --learn-accent-soft: #d8d8d8;
  --learn-cyan: #aeefff;
  --learn-teal: #c8fff0;
  --learn-amber: #ffe7a8;
  --learn-purple: #ddd0ff;
  --learn-danger: #ffb8c4;
  --learn-success: #d6ffe0;
  --learn-shadow: 0 20px 70px rgba(0, 0, 0, 0.58);
  --learn-radius: 8px;
  --learn-topbar: 58px;
  --learn-tendril-intensity: 1.18;
  color-scheme: dark;
  font-family:
    Manrope,
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
}

html[data-accent="cyan"] {
  --learn-accent: var(--learn-cyan);
  --learn-accent-soft: #e9fbff;
}
html[data-accent="teal"] {
  --learn-accent: var(--learn-teal);
  --learn-accent-soft: #edfff9;
}
html[data-accent="amber"] {
  --learn-accent: var(--learn-amber);
  --learn-accent-soft: #fff6d9;
}
html[data-accent="purple"] {
  --learn-accent: var(--learn-purple);
  --learn-accent-soft: #f2ecff;
}
html[data-density="compact"] .learn-view-root .learn-lesson-panel .lesson-view {
  padding: 24px;
}
html[data-density="compact"] .learn-article-body p,
html[data-density="compact"] .learn-article-body li {
  line-height: 1.55;
}
html[data-motion="reduced"] * {
  animation-duration: 0.001ms !important;
  transition-duration: 0.001ms !important;
  scroll-behavior: auto !important;
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

* {
  box-sizing: border-box;
}
html,
body {
  min-height: 100%;
  margin: 0;
}
body {
  background:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.026) 1px, transparent 1px),
    linear-gradient(135deg, #020202 0%, #080808 52%, #020202 100%);
  background-size:
    48px 48px,
    48px 48px,
    auto;
  color: var(--learn-text);
  overflow: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.03) 0 1px, transparent 1px 7px),
    linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.04), transparent);
  opacity: 0.25;
}

button,
input,
textarea,
select {
  font: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}
button {
  color: inherit;
}
button:not(:disabled),
a {
  cursor: pointer;
}

.learn-icon-sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.learn-icon {
  width: 18px;
  height: 18px;
  display: block;
  flex: 0 0 auto;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.85;
}

:focus-visible {
  outline: 2px solid var(--learn-accent);
  outline-offset: 3px;
}

.learn-shell {
  width: 100%;
  height: 100vh;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  grid-template-rows: var(--learn-topbar) minmax(0, 1fr);
  overflow: hidden;
}

.learn-eyebrow,
.learn-card-label {
  color: var(--learn-muted);
  font-family: "Space Mono", Consolas, ui-monospace, monospace;
  font-size: 11px;
  line-height: 1.2;
  letter-spacing: 0;
  text-transform: uppercase;
}

.learn-nav-item {
  min-height: 42px;
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  border-radius: 9px;
  padding: 0 8px 0 0;
  color: var(--learn-muted);
  font-size: 13.5px;
  letter-spacing: 0.01em;
  background: transparent;
  transition:
    background 160ms ease,
    color 160ms ease;
}

.learn-nav-item:hover {
  color: var(--learn-text);
  background: rgba(255, 255, 255, 0.04);
}

.learn-nav-item.is-active {
  color: var(--learn-text);
  background: rgba(255, 255, 255, 0.05);
}

.learn-nav-item.is-active .learn-nav-label {
  font-weight: 600;
}

.learn-nav-label {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.learn-nav-icon {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border: 1.5px solid rgba(255, 255, 255, 0.26);
  border-radius: 50%;
  background: #08090b;
  color: var(--learn-dim);
  transition:
    color 160ms ease,
    border-color 160ms ease,
    box-shadow 160ms ease;
}

.learn-nav-icon .learn-icon {
  width: 15px;
  height: 15px;
  stroke-width: 2;
}

.learn-nav-item:hover .learn-nav-icon {
  color: var(--learn-text);
  border-color: rgba(255, 255, 255, 0.55);
}

.learn-nav-item.is-active .learn-nav-icon {
  color: #fff;
  border-color: var(--learn-accent);
  border-width: 2px;
  box-shadow:
    0 0 0 3px rgba(255, 255, 255, 0.08),
    0 0 16px rgba(255, 255, 255, 0.22);
}

.learn-topbar {
  grid-column: 1;
  grid-row: 1;
  position: relative;
  z-index: 9;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 440px);
  align-items: center;
  gap: 14px;
  padding: 9px 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
  background: rgba(5, 5, 5, 0.76);
  backdrop-filter: blur(14px);
  box-shadow: 0 14px 30px -18px rgba(255, 255, 255, 0.3);
}

.learn-topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.learn-topbar-actions .learn-search-trigger {
  flex: 1 1 auto;
}

.learn-topbar::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -5px;
  height: 9px;
  pointer-events: none;
  background:
    radial-gradient(
      circle 4.5px at 13px 4.5px,
      var(--learn-bg) 0 1.5px,
      rgba(255, 255, 255, 0.85) 2px 4px,
      transparent 4.5px
    ),
    radial-gradient(
      circle 4.5px at calc(100% - 13px) 4.5px,
      var(--learn-bg) 0 1.5px,
      rgba(255, 255, 255, 0.85) 2px 4px,
      transparent 4.5px
    ),
    linear-gradient(90deg, rgba(255, 255, 255, 0.16), rgba(255, 255, 255, 0.6) 50%, rgba(255, 255, 255, 0.16)) 0 3px /
      100% 3px no-repeat;
}

.learn-topbar-context {
  min-width: 0;
  display: grid;
  gap: 2px;
}

.learn-topbar-context strong {
  min-width: 0;
  overflow: hidden;
  color: var(--learn-text);
  font-family: "Space Mono", Consolas, monospace;
  font-size: 13px;
  line-height: 1.1;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.learn-window-dots {
  display: flex;
  gap: 7px;
  margin-right: 16px;
}
.learn-window-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: block;
  background: #d0d0d0;
}
.learn-window-dots span:nth-child(2) {
  opacity: 0.62;
}
.learn-window-dots span:nth-child(3) {
  opacity: 0.36;
}

.learn-icon-button,
.learn-search-trigger,
.learn-address,
.learn-button,
.learn-chip,
.learn-input,
.learn-select,
.learn-toggle,
.learn-range {
  min-height: 36px;
  border: 1px solid var(--learn-line);
  border-radius: var(--learn-radius);
  background: rgba(255, 255, 255, 0.035);
  color: var(--learn-text);
}

.learn-icon-button {
  width: 36px;
  padding: 0;
  display: grid;
  place-items: center;
}

.learn-icon-button .learn-icon {
  width: 16px;
  height: 16px;
}

.learn-button,
.learn-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 12px;
  font-size: 13px;
}

.learn-icon-button:hover,
.learn-search-trigger:hover,
.learn-address:hover,
.learn-button:hover,
.learn-chip:hover {
  border-color: var(--learn-line-strong);
  background: rgba(255, 255, 255, 0.07);
}

.learn-button:disabled,
.learn-chip:disabled,
.learn-toggle:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.learn-address {
  justify-self: center;
  min-width: 0;
  width: min(520px, 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: #e6e6e6;
  font-size: 13px;
}

.learn-lock-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--learn-accent);
}

.learn-address .learn-icon {
  width: 15px;
  height: 15px;
  color: var(--learn-accent);
}

.learn-address span:last-child {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.learn-search-trigger {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 10px;
  width: 100%;
  padding: 0 12px;
  color: var(--learn-muted);
  text-align: left;
}

.learn-search-trigger .learn-icon {
  width: 16px;
  height: 16px;
  color: var(--learn-accent);
}

.learn-search-trigger span {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.learn-view-root {
  grid-column: 1;
  grid-row: 2;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
}

.learn-loading,
.learn-error-panel {
  height: 100%;
  display: grid;
  place-content: center;
  gap: 10px;
  text-align: center;
}

.learn-loading h1,
.learn-error-panel h1,
.learn-page-title,
.learn-article-title {
  margin: 0;
  font-family: "Chakra Petch", "Arial Narrow", system-ui, sans-serif;
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0;
}

.learn-workspace {
  height: 100%;
  padding: 16px;
  display: grid;
  gap: 16px;
  min-height: 0;
}

.learn-map-workspace {
  position: relative;
  isolation: isolate;
  grid-template-columns: minmax(0, 1fr);
  align-items: stretch;
  overflow: hidden;
}
.learn-library-workspace {
  grid-template-columns: minmax(0, 1fr) 360px;
}
.learn-single-workspace {
  overflow: auto;
}