* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-background: #f5f5f7;
  --color-background-alt: #ffffff;
  --color-text-primary: #0f0f11;
  --color-text-secondary: #4a4a4f;
  --color-accent: #0071e3;
  --color-accent-dark: #004ba8;
  --color-border-soft: rgba(15, 23, 42, 0.08);
  --color-border-strong: rgba(15, 23, 42, 0.12);
  --color-border-highlight: rgba(255, 255, 255, 0.72);
  --color-border-surface: rgba(255, 255, 255, 0.55);
  --color-surface: #ffffff;
  --color-surface-muted: rgba(255, 255, 255, 0.78);
  --shadow-soft: 0 22px 48px rgba(15, 23, 42, 0.08);
  --shadow-strong: 0 26px 60px rgba(0, 113, 227, 0.18);
  --surface-gradient: linear-gradient(150deg, rgba(255, 255, 255, 0.94), rgba(245, 245, 247, 0.68));
  --surface-pill: linear-gradient(145deg, rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.7));
  --backdrop-glass: saturate(180%) blur(20px);
}

html {
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
  font-kerning: normal;
  font-feature-settings: "kern", "liga", "clig";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, system-ui, BlinkMacSystemFont, "Segoe UI", "Segoe UI Emoji", "Segoe UI Symbol", "Apple Color Emoji", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  font-weight: 400;
  line-height: 1.68;
  color: var(--color-text-primary);
  background: linear-gradient(to bottom left, rgba(0, 113, 227, 0.18) 0%, rgba(232, 240, 255, 0.92) 48%, var(--color-background) 75%, var(--color-background-alt) 100%);
  background-attachment: fixed;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-wrap: break-word;
}

main {
  display: block;
}

h1, h2, h3 {
  font-family: "Book Antiqua", Georgia, "Times New Roman", serif;
  color: var(--color-text-primary);
  line-height: 1.18;
  letter-spacing: 0.01em;
  margin-top: 1.6rem;
  margin-bottom: 0.8rem;
}

h1 { font-size: 1.8rem; }
h2 { font-size: 1.4rem; }
h3 { font-size: 1.2rem; }

p {
  margin-top: 0;
  margin-bottom: 0.95rem;
  color: var(--color-text-secondary);
}

a {
  color: var(--color-accent);
  text-decoration: none;
  text-decoration-color: rgba(0, 113, 227, 0.25);
  transition: color 0.2s ease, text-decoration-color 0.2s ease, text-shadow 0.2s ease;
}

a:hover {
  color: var(--color-accent-dark);
  text-decoration-color: rgba(0, 75, 168, 0.4);
  text-shadow: 0 8px 18px rgba(0, 113, 227, 0.2);
}

a:visited {
  color: #0056b3;
}

a:focus-visible {
  outline: 2px solid rgba(0, 113, 227, 0.35);
  outline-offset: 3px;
}

hr {
  margin-top: 30px;
  margin-bottom: 30px;
  border: none;
  border-top: 1px solid rgba(15, 23, 42, 0.1);
}

img {
  max-width: 100%;
  vertical-align: middle;
  border-radius: 18px;
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(255, 255, 255, 0.6);
  background-color: rgba(255, 255, 255, 0.7);
}

figure > img {
  display: block;
}

figure {
  margin-block: 1.6rem;
}

figcaption {
  font-size: 0.875rem;
  color: rgba(15, 23, 42, 0.55);
  text-align: center;
  margin-top: 0.4rem;
}

ul, ol {
  margin-left: 30px;
  margin-bottom: 1rem;
}

li > ul,
li > ol {
  margin-bottom: 0;
}

blockquote {
  color: var(--color-text-secondary);
  border-left: 3px solid rgba(0, 113, 227, 0.35);
  padding: 20px 26px;
  font-size: 1rem;
  font-style: italic;
  background: linear-gradient(140deg, rgba(255, 255, 255, 0.85), rgba(255, 255, 255, 0.6));
  border-radius: 18px;
  box-shadow: var(--shadow-soft);
  backdrop-filter: var(--backdrop-glass);
  -webkit-backdrop-filter: var(--backdrop-glass);
  position: relative;
  overflow: hidden;
}

blockquote::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top right, rgba(0, 113, 227, 0.16), transparent 45%), radial-gradient(circle at bottom left, rgba(15, 23, 42, 0.08), transparent 55%);
  pointer-events: none;
  mix-blend-mode: screen;
}

blockquote > :last-child {
  margin-bottom: 0;
}

pre,
code {
  font-family: "Menlo", "Inconsolata", "Consolas", "Roboto Mono", "Ubuntu Mono", "Liberation Mono", "Courier New", monospace;
  background-color: rgba(245, 245, 247, 0.75);
}

pre {
  padding: 14px 18px;
  font-size: 15px;
  line-height: 1.55;
  color: #1f2933;
  background: var(--surface-gradient);
  border: 1px solid var(--color-border-surface);
  border-radius: 20px;
  overflow-x: auto;
  box-shadow: var(--shadow-soft);
  backdrop-filter: var(--backdrop-glass);
  -webkit-backdrop-filter: var(--backdrop-glass);
}

pre > code {
  display: block;
  width: 100%;
  padding: 0;
  margin: 0;
  background: transparent;
  border: 0;
}

code {
  display: inline-block;
  padding: 0.2rem 0.45rem;
  font-size: 0.95em;
  color: var(--color-text-primary);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: 10px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.8), 0 10px 18px rgba(15, 23, 42, 0.08);
  vertical-align: baseline;
}

table {
  margin-bottom: 32px;
  width: 100%;
  text-align: left;
  color: var(--color-text-primary);
  border-collapse: collapse;
  border: 1px solid var(--color-border-surface);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  background: var(--surface-gradient);
  backdrop-filter: var(--backdrop-glass);
  -webkit-backdrop-filter: var(--backdrop-glass);
}

table tr:nth-child(even) {
  background-color: rgba(245, 245, 247, 0.7);
}

table tr:hover {
  background: linear-gradient(155deg, rgba(255, 255, 255, 0.98), rgba(0, 113, 227, 0.1));
  transition: background 0.2s ease;
}

table th,
table td {
  padding: 12px 18px;
}

table th {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.82), rgba(245, 245, 247, 0.65));
  border: none;
  font-weight: 600;
  letter-spacing: 0.01em;
}

table td {
  border-top: 1px solid rgba(15, 23, 42, 0.06);
}

table tr:last-child td {
  border-bottom: none;
}

@media screen and (max-width: 800px) {
  table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    -ms-overflow-style: -ms-autohiding-scrollbar;
  }
}

.wrapper {
  max-width: 900px;
  margin-inline: auto;
  padding-inline: 30px;
  padding-top: 18px;
  padding-bottom: 12px;
}

.page-content {
  padding-top: 60px;
  padding-bottom: 36px;
  flex: 1 0 auto;
}

.card {
  position: relative;
  border-radius: 20px;
  border: 1px solid var(--color-border-highlight);
  background: var(--color-surface);
  box-shadow: var(--shadow-soft);
  backdrop-filter: var(--backdrop-glass);
  -webkit-backdrop-filter: var(--backdrop-glass);
  overflow: hidden;
}

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

.card-hover {
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  --card-raise: -4px;
}

.card-hover:hover,
.card-hover:focus-within {
  transform: translateY(var(--card-raise, -4px));
  box-shadow: var(--shadow-strong);
  border-color: rgba(0, 113, 227, 0.3);
}

.page-shell {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.page-header {
  margin-top: 0.65rem;
  margin-bottom: 0.5rem;
}

.page-heading {
  margin-top: 0.65rem;
  margin-bottom: 0.4rem;
}

.page-subtitle {
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

.page-body {
  padding: 26px 28px;
}

.section-heading {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 0.6rem;
}

.muted {
  color: var(--color-text-secondary);
}

.stacked-list {
  list-style: none;
  margin: 0;
  padding-left: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.stacked-list li {
  color: var(--color-text-secondary);
}

.group-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin-top: 10px;
}

.group-block h3 {
  margin-top: 0;
  margin-bottom: 6px;
}

.group-list .inline {
  gap: 6px;
}

.link-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.pill-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid rgba(0, 113, 227, 0.2);
  background: var(--surface-pill);
  color: var(--color-text-primary);
  font-weight: 600;
  letter-spacing: 0.02em;
  box-shadow: 0 14px 28px rgba(15, 23, 42, 0.08);
  backdrop-filter: var(--backdrop-glass);
  -webkit-backdrop-filter: var(--backdrop-glass);
  transition: color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.pill-link:hover {
  color: var(--color-accent);
  border-color: rgba(0, 113, 227, 0.5);
  transform: translateY(-1px);
  box-shadow: 0 18px 34px rgba(0, 113, 227, 0.18);
}

.note-list {
  margin: 0;
  padding-left: 18px;
  color: var(--color-text-secondary);
}

.site-header {
  position: relative;
  width: 100%;
  min-height: 44px;
  line-height: 1;
  background: var(--surface-gradient);
  border-top: 1px solid var(--color-border-highlight);
  border-bottom: 1px solid rgba(15, 23, 42, 0.08);
  padding: 6px 0;
  box-shadow: 0 14px 30px rgba(15, 23, 42, 0.08);
  transition: background 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease;
  backdrop-filter: var(--backdrop-glass);
  -webkit-backdrop-filter: var(--backdrop-glass);
  z-index: 30;
}

.site-header::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0) 35%, rgba(0, 113, 227, 0.08) 85%, rgba(0, 113, 227, 0));
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.4s ease;
}

.site-header:hover::after {
  opacity: 1;
}

.site-header .wrapper {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-title {
  font-size: 1.68rem;
  font-family: "Book Antiqua", Georgia, "Times New Roman", serif;
  margin-bottom: 0;
  display: inline-flex;
  align-items: center;
  color: var(--color-text-primary);
  letter-spacing: 0.025em;
  text-decoration: none;
  text-shadow: 0 12px 24px rgba(0, 0, 0, 0.12);
  transition: color 0.2s ease, text-shadow 0.3s ease;
}

.site-title:visited {
  color: var(--color-text-primary);
}

.site-title:hover,
.site-title:focus-visible {
  color: var(--color-accent);
  text-shadow: 0 18px 40px rgba(0, 113, 227, 0.28);
}

.site-nav {
  border: none;
  background-color: transparent;
  display: flex;
  gap: clamp(30px, 5vw, 44px);
  align-items: center;
  float: none;
  margin-left: auto;
}

.site-nav label[for="nav-trigger"],
.site-nav #nav-trigger {
  display: none;
}

.site-nav .nav-item {
  font-family: "Book Antiqua", Georgia, "Times New Roman", serif;
  font-size: 1.05rem;
  color: var(--color-text-primary);
  display: inline-flex;
  align-items: center;
  position: relative;
  margin-left: 15px;
  line-height: 1.2;
  letter-spacing: 0.02em;
  transition: color 0.2s ease, text-shadow 0.3s ease;
}

.site-nav .nav-item::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background-color: currentColor;
  transform: scaleX(0);
  transform-origin: center;
  opacity: 0.35;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.site-nav .nav-item:hover,
.site-nav .nav-item:focus-visible {
  color: var(--color-accent);
  text-shadow: 0 14px 22px rgba(0, 113, 227, 0.24);
}

.site-nav .nav-item:hover::after,
.site-nav .nav-item:focus-visible::after {
  transform: scaleX(1);
  opacity: 1;
}

.site-footer {
  border-top: 1px solid var(--color-border-highlight);
  padding: 12px 0 18px 0;
  background: var(--surface-gradient);
  color: var(--color-text-secondary);
  backdrop-filter: var(--backdrop-glass);
  -webkit-backdrop-filter: var(--backdrop-glass);
  box-shadow: 0 -12px 24px rgba(15, 23, 42, 0.04);
}

.site-footer .wrapper {
  text-align: left;
  max-width: 900px;
}

.site-footer a {
  color: var(--color-accent);
  text-decoration-color: rgba(0, 113, 227, 0.4);
  transition: color 0.2s ease, text-decoration-color 0.2s ease;
}

.site-footer a:hover {
  color: var(--color-accent-dark);
  text-decoration-color: rgba(0, 75, 168, 0.55);
}

@media screen and (max-width: 900px) {
  .wrapper {
    padding-inline: 22px;
  }
}

@media screen and (max-width: 600px) {
  pre,
  code {
    font-family: monospace;
  }

  .wrapper {
    padding-inline: 18px;
  }

  .site-title {
    padding-right: 45px;
  }

  .site-header .wrapper {
    align-items: flex-start;
  }

  .site-nav {
    position: absolute;
    top: 9px;
    right: 18px;
    background: var(--surface-pill);
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: 16px;
    text-align: right;
    padding: 6px 10px;
    box-shadow: var(--shadow-soft);
    backdrop-filter: var(--backdrop-glass);
    -webkit-backdrop-filter: var(--backdrop-glass);
    display: block;
    margin-left: 0;
  }

  .site-nav label[for="nav-trigger"] {
    display: block;
    float: right;
    width: 36px;
    height: 36px;
    cursor: pointer;
  }

  .site-nav .menu-icon {
    float: right;
    width: 36px;
    height: 26px;
    line-height: 0;
    padding-top: 18px;
    text-align: center;
    color: var(--color-text-primary);
  }

  .site-nav .menu-icon::before {
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    color: var(--color-text-primary);
    transition: color 0.2s ease;
  }

  .site-nav .menu-icon > svg path {
    fill: var(--color-text-primary);
  }

  .site-nav #nav-trigger ~ label[for="nav-trigger"] .menu-icon::before {
    content: "\f0c9";
    font-size: 1.25em;
    color: var(--color-text-primary);
  }

  .site-nav #nav-trigger ~ .nav-items {
    clear: both;
    display: none;
  }

  .site-nav #nav-trigger:checked ~ label[for="nav-trigger"] .menu-icon::before {
    content: "\f00d";
    font-size: 1.5em;
    color: var(--color-accent);
  }

  .site-nav #nav-trigger:checked ~ .nav-items {
    display: block;
    padding-bottom: 5px;
  }

  .site-nav #nav-trigger:checked ~ .nav-items .nav-item {
    margin-left: 20px;
    padding: 5px 10px;
  }

  .site-nav .nav-item {
    display: block;
    padding: 5px 0;
    color: var(--color-text-primary);
    line-height: 1.5;
  }

  .site-nav .nav-item::after {
    display: none;
  }
}