:root {
  --md-primary-fg-color: #111827;
  --md-primary-fg-color--light: #1f2937;
  --md-primary-fg-color--dark: #070b14;
  --md-accent-fg-color: #7c83ff;
  --notes-radius: 16px;
  --notes-content-width: 76rem;
}

[data-md-color-scheme="slate"] {
  --md-default-bg-color: #0b0f19;
  --md-default-bg-color--light: #101624;
  --md-default-bg-color--lighter: #151c2c;
  --md-default-fg-color: #e8ecf5;
  --md-default-fg-color--light: #b5bdcc;
  --md-default-fg-color--lighter: #7d8799;
  --md-typeset-color: #cbd3e1;
  --md-typeset-a-color: #8b93ff;
  --md-code-bg-color: #111827;
  --md-code-fg-color: #d9e2f1;
  --md-accent-fg-color: #9aa0ff;
  --notes-surface: rgba(20, 27, 43, 0.72);
  --notes-surface-strong: #121927;
  --notes-border: rgba(148, 163, 184, 0.17);
  --notes-grid: rgba(148, 163, 184, 0.035);
  --notes-shadow: rgba(0, 0, 0, 0.28);
  --notes-kicker: #9aa0ff;
}

[data-md-color-scheme="default"] {
  --md-default-bg-color: #f6f7fb;
  --md-default-bg-color--light: #ffffff;
  --md-default-bg-color--lighter: #f0f2f8;
  --md-default-fg-color: #172033;
  --md-default-fg-color--light: #4e5b70;
  --md-default-fg-color--lighter: #7b879a;
  --md-typeset-color: #344057;
  --md-typeset-a-color: #565fde;
  --md-code-bg-color: #edf0f7;
  --md-code-fg-color: #243047;
  --md-accent-fg-color: #4f58d7;
  --notes-surface: rgba(255, 255, 255, 0.86);
  --notes-surface-strong: #ffffff;
  --notes-border: rgba(51, 65, 85, 0.13);
  --notes-grid: rgba(51, 65, 85, 0.035);
  --notes-shadow: rgba(28, 38, 58, 0.08);
  --notes-kicker: #565fde;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC",
    "Noto Sans SC", Arial, sans-serif;
}

.md-container {
  background-color: var(--md-default-bg-color);
  background-image:
    linear-gradient(var(--notes-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--notes-grid) 1px, transparent 1px),
    radial-gradient(circle at 55% -10%, rgba(99, 102, 241, 0.13), transparent 34rem);
  background-size: 32px 32px, 32px 32px, auto;
}

.md-header {
  background: rgba(9, 13, 23, 0.82);
  border-bottom: 1px solid var(--notes-border);
  box-shadow: none;
  backdrop-filter: blur(18px);
}

.md-tabs {
  border-bottom: 1px solid var(--notes-border);
  background: rgba(9, 13, 23, 0.76);
  backdrop-filter: blur(18px);
}

[data-md-color-scheme="default"] .md-tabs {
  background: rgba(255, 255, 255, 0.76);
  color: #344057;
}

.md-tabs__link {
  position: relative;
  margin-top: 0.7rem;
  padding-bottom: 0.68rem;
  font-weight: 600;
  opacity: 0.72;
}

.md-tabs__link::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 2px;
  border-radius: 999px;
  background: var(--md-accent-fg-color);
  opacity: 0;
  transform: scaleX(0.35);
  transition: opacity 160ms ease, transform 160ms ease;
  content: "";
}

.md-tabs__item--active .md-tabs__link,
.md-tabs__link:hover {
  color: var(--md-default-fg-color);
  opacity: 1;
}

.md-tabs__item--active .md-tabs__link::after {
  opacity: 1;
  transform: scaleX(1);
}

.md-nav__link--active {
  font-weight: 650;
}

[data-md-color-scheme="default"] .md-header {
  background: rgba(255, 255, 255, 0.82);
  color: #172033;
}

.md-grid {
  max-width: var(--notes-content-width);
}

.md-main__inner {
  margin-top: 1.4rem;
}

.md-content__inner {
  padding-bottom: 4rem;
}

.md-content__inner::before {
  height: 0;
}

.md-typeset {
  color: var(--md-typeset-color);
  font-size: 0.78rem;
  line-height: 1.85;
}

.md-typeset h1,
.md-typeset h2,
.md-typeset h3 {
  color: var(--md-default-fg-color);
  font-weight: 700;
  letter-spacing: -0.025em;
}

.md-typeset h1 {
  max-width: 13ch;
  margin: 1.3rem 0 0.7rem;
  font-size: clamp(2.4rem, 7vw, 4.6rem);
  line-height: 1.02;
  background: linear-gradient(105deg, var(--md-default-fg-color) 25%, #8d96ff 92%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.md-typeset h2 {
  margin-top: 2.8rem;
  padding-top: 0.25rem;
  font-size: 1.45rem;
}

.md-typeset h2::before {
  display: inline-block;
  width: 0.36rem;
  height: 0.36rem;
  margin: 0 0.55rem 0.16rem 0;
  border-radius: 50%;
  background: var(--md-accent-fg-color);
  box-shadow: 0 0 1rem rgba(124, 131, 255, 0.45);
  content: "";
}

.md-typeset .headerlink {
  margin-left: 0.35em;
  color: var(--md-accent-fg-color);
  font-size: 0.42em;
  vertical-align: middle;
  opacity: 0;
  transition: opacity 160ms ease;
}

.md-typeset :is(h1, h2, h3):hover .headerlink,
.md-typeset .headerlink:focus-visible {
  opacity: 0.7;
}

.md-typeset h1 .headerlink {
  display: none;
}

.md-typeset a {
  text-underline-offset: 0.18em;
  transition: color 160ms ease;
}

.md-typeset a:hover {
  color: var(--md-accent-fg-color);
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 0.45rem;
  color: var(--notes-kicker);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.17em;
}

.hero-kicker::before {
  width: 1.4rem;
  height: 1px;
  background: currentColor;
  content: "";
}

.hero-intro {
  max-width: 46rem;
  margin: 1.25rem 0 2.8rem;
  color: var(--md-default-fg-color--light);
  font-size: clamp(0.95rem, 2vw, 1.16rem);
}

.hero-intro p {
  margin: 0.35rem 0;
}

.md-typeset table:not([class]) {
  display: table;
  width: 100%;
  border: 1px solid var(--notes-border);
  border-radius: var(--notes-radius);
  background: var(--notes-surface);
  box-shadow: 0 18px 48px var(--notes-shadow);
  overflow: hidden;
}

.md-typeset table:not([class]) th {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--notes-border);
  background: rgba(124, 131, 255, 0.08);
  color: var(--md-default-fg-color);
  font-size: 0.7rem;
  letter-spacing: 0.045em;
}

.md-typeset table:not([class]) td {
  padding: 0.8rem 1rem;
  border-top: 1px solid var(--notes-border);
}

.md-typeset table:not([class]) tr:hover td {
  background: rgba(124, 131, 255, 0.045);
}

.md-typeset pre > code {
  padding: 1.15rem 1.25rem;
  line-height: 1.72;
}

.md-typeset pre {
  border: 1px solid var(--notes-border);
  border-radius: var(--notes-radius);
  box-shadow: 0 18px 48px var(--notes-shadow);
}

.md-typeset code {
  border-radius: 0.38rem;
}

.note-panel {
  margin: 1rem 0;
  padding: 1rem 1.2rem;
  border: 1px solid var(--notes-border);
  border-left: 3px solid var(--md-accent-fg-color);
  border-radius: 0 var(--notes-radius) var(--notes-radius) 0;
  background: var(--notes-surface);
}

.note-panel p {
  margin: 0;
}

.topic-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
  margin: 1.25rem 0 2rem;
}

.topic-card {
  min-height: 8rem;
  padding: 1.15rem 1.25rem;
  border: 1px solid var(--notes-border);
  border-radius: var(--notes-radius);
  background: var(--notes-surface);
  box-shadow: 0 18px 48px var(--notes-shadow);
  transition: border-color 160ms ease, transform 160ms ease;
}

.topic-card:hover {
  border-color: rgba(154, 160, 255, 0.48);
  transform: translateY(-2px);
}

.topic-card h2,
.topic-card h3 {
  margin: 0 0 0.45rem;
  padding: 0;
  font-size: 1rem;
}

.topic-card h2::before {
  display: none;
}

.topic-card p {
  margin: 0.3rem 0;
  color: var(--md-default-fg-color--light);
}

.topic-card > a:last-child {
  display: inline-block;
  margin-top: 0.5rem;
  font-weight: 650;
}

.section-kicker {
  color: var(--notes-kicker);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.back-home {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 2.5rem;
  font-weight: 650;
}

.back-home::before {
  content: "←";
}

@media screen and (max-width: 44.984375em) {
  .md-main__inner {
    margin-top: 0.5rem;
  }

  .md-typeset {
    font-size: 0.75rem;
  }

  .md-typeset h1 {
    margin-top: 0.8rem;
  }

  .md-typeset table:not([class]) {
    display: block;
    overflow-x: auto;
  }

  .topic-list {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}