:root {
  --color-bg: #F6F6FA;
  --color-panel: #FFFFFF;
  --color-panel-soft: #EDEEF6;
  --color-border: #E2E3EE;
  --color-accent: #FFC21A;
  --color-accent-dark: #765400;
  --color-accent-warm: #FF9A1F;
  --color-text: #14163A;
  --color-text-muted: #5B5E7A;
  --color-success: #1F9D5C;
  --color-warning: #E07A1F;
  --color-error: #D6334C;
  --color-card-start: #F1F2FA;
  --color-flag-red: #D8232A;
  --color-flag-navy: #1F3A93;
  --color-flag-blue-fr: #1F4FA5;
  --color-flag-blue-nl: #274C9A;
  --color-white: #FFFFFF;
  --rgb-accent: 255, 194, 26;
  --rgb-warm: 255, 154, 31;
  --rgb-text: 20, 22, 58;
  --rgb-white: 255, 255, 255;
  --rgb-success: 31, 157, 92;
  --font-display: 'Inter', 'Noto Sans SC', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Hiragino Sans', 'Apple SD Gothic Neo', 'Malgun Gothic', system-ui, sans-serif;
  --font-body: 'Inter', 'Noto Sans SC', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Hiragino Sans', 'Apple SD Gothic Neo', 'Malgun Gothic', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Menlo, Consolas, 'Liberation Mono', monospace;
  --radius-small: 8px;
  --radius-medium: 10px;
  --radius-pill: 999px;
  --header-height: 72px;
  --content-width: 1248px;
  --gutter: 24px;
  --section-space: 104px;
  --shadow-panel: 0 28px 56px -18px rgba(var(--rgb-accent), .12), 0 20px 48px -18px rgba(var(--rgb-text), .08);
  --shadow-card: 0 18px 40px -20px rgba(var(--rgb-text), .13), 0 18px 36px -22px rgba(var(--rgb-accent), .15);
  --focus-ring: 0 0 0 4px rgba(var(--rgb-accent), .32);
  --toc-offset: 132px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 16px);
  -webkit-text-size-adjust: 100%;
}

html.nav-open {
  overflow: hidden;
}

body {
  min-width: 0;
  min-height: 100svh;
  margin: 0;
  overflow-x: clip;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image: radial-gradient(rgba(var(--rgb-text), .05) .55px, transparent .8px);
  background-size: 14px 14px;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body::before {
  position: absolute;
  z-index: -1;
  top: 0;
  right: 0;
  left: 0;
  height: 100svh;
  pointer-events: none;
  content: "";
  background:
    linear-gradient(112deg, rgba(var(--rgb-accent), .07) 0%, rgba(var(--rgb-accent), .045) 36%, rgba(var(--rgb-accent), 0) 62%),
    linear-gradient(180deg, rgba(var(--rgb-accent), .04) 0%, rgba(var(--rgb-accent), 0) 68%);
}

img,
svg,
video {
  display: block;
  max-width: 100%;
}

img {
  height: auto;
}

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

button {
  border: 0;
  cursor: pointer;
}

a {
  color: inherit;
  text-decoration: none;
}

p,
h1,
h2,
h3,
h4,
ul,
ol,
dl,
dd,
figure,
blockquote {
  margin: 0;
}

ul,
ol {
  padding: 0;
}

ul[role="list"],
ol[role="list"],
.site-nav ul,
.mobile-nav ul,
.footer-links,
.trust,
.plats,
.flags {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  color: var(--color-text);
  font-family: var(--font-display);
  text-wrap: balance;
}

h1 {
  font-size: clamp(52px, 5.2vw, 68px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -.02em;
}

h2 {
  font-size: clamp(36px, 4vw, 52px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -.02em;
}

h3 {
  font-size: clamp(22px, 2.4vw, 30px);
  font-weight: 800;
  line-height: 1.25;
}

p {
  color: var(--color-text-muted);
}

strong {
  color: var(--color-text);
}

code,
kbd,
samp {
  font-family: var(--font-mono);
}

:not(pre) > code {
  padding: .12em .38em;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-small);
  overflow-wrap: anywhere;
  background: var(--color-panel-soft);
  color: var(--color-text);
  font-size: .9em;
}

pre {
  max-width: 100%;
  padding: 20px;
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  background: var(--color-text);
  color: var(--color-panel);
  tab-size: 2;
  -webkit-overflow-scrolling: touch;
}

pre code {
  overflow-wrap: normal;
  white-space: pre;
}

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

::selection {
  background: var(--color-accent);
  color: var(--color-text);
}

.wrap {
  width: 100%;
  max-width: var(--content-width);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  position: relative;
  padding-top: var(--section-space);
  padding-bottom: var(--section-space);
  overflow-x: clip;
}

.section-head {
  max-width: 760px;
  margin-bottom: 40px;
}

.section-head p {
  margin-top: 16px;
  font-size: 18px;
}

.no-break {
  white-space: nowrap;
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.panel,
.card {
  min-width: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  background: var(--color-panel);
  box-shadow: inset 0 0 0 1px rgba(var(--rgb-white), .9), var(--shadow-card);
}

.panel {
  padding: 32px;
}

.card {
  padding: 24px;
}

.btn {
  display: inline-flex;
  min-width: 24px;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 24px;
  border: 1.5px solid transparent;
  border-radius: var(--radius-small);
  font-weight: 750;
  line-height: 1;
  text-align: center;
  white-space: nowrap;
  transition: transform .2s ease, box-shadow .2s ease, color .2s ease, background-color .2s ease;
}

.btn svg {
  width: 16px;
  height: 16px;
  flex: 0 0 16px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-warm));
  color: var(--color-text);
  box-shadow: 0 12px 26px -12px rgba(var(--rgb-accent), .7), inset 0 1px 0 rgba(var(--rgb-white), .35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 17px 30px -12px rgba(var(--rgb-accent), .8), inset 0 1px 0 rgba(var(--rgb-white), .35);
}

.btn-secondary {
  border-color: var(--color-text);
  background: transparent;
  color: var(--color-text);
}

.btn-secondary:hover {
  background: var(--color-text);
  color: var(--color-panel);
}

.btn-soft {
  border-color: var(--color-border);
  background: var(--color-panel-soft);
  color: var(--color-text);
}

.btn[aria-disabled="true"],
.btn:disabled {
  cursor: not-allowed;
  opacity: .48;
  transform: none;
}

.eyebrow,
.badge,
.tag {
  display: inline-flex;
  max-width: 100%;
  min-height: 26px;
  align-items: center;
  gap: 7px;
  padding: 3px 10px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-panel);
  color: var(--color-text-muted);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.35;
}

.eyebrow svg,
.badge svg,
.tag svg {
  width: 13px;
  height: 13px;
  flex: 0 0 13px;
}

.badge-accent {
  border-color: var(--color-accent);
  background: var(--color-accent);
  color: var(--color-text);
}

.badge-success {
  border-color: var(--color-success);
  color: var(--color-success);
}

.reveal {
  transition: opacity .65s ease, transform .65s ease;
}

.reveal.pending {
  opacity: 0;
  transform: translateY(16px);
}

.reveal.shown {
  opacity: 1;
  transform: none;
}

.site-header {
  position: sticky;
  z-index: 50;
  top: 0;
  height: var(--header-height);
  border-bottom: 1px solid rgba(var(--rgb-text), .06);
  background: rgba(var(--rgb-white), .78);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.header-inner {
  position: relative;
  display: flex;
  width: 100%;
  height: 100%;
  align-items: center;
  gap: 22px;
}

.site-brand {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

.site-brand img {
  width: 32px;
  height: 32px;
  flex: 0 0 32px;
  filter: drop-shadow(0 6px 8px rgba(var(--rgb-accent), .25));
}

.brand-word {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 900;
  letter-spacing: -.02em;
}

.brand-local {
  color: var(--color-text-muted);
  font-size: 14px;
  font-weight: 600;
}

.site-nav {
  margin-left: auto;
}

.site-nav ul {
  display: flex;
  align-items: center;
  gap: 3px;
}

.site-nav a {
  display: inline-flex;
  min-height: 36px;
  align-items: center;
  justify-content: center;
  padding-inline: 12px;
  border-radius: var(--radius-pill);
  color: var(--color-text-muted);
  font-size: 14px;
  font-weight: 550;
  white-space: nowrap;
  transition: color .2s ease, background-color .2s ease;
}

.site-nav a:hover {
  background: rgba(var(--rgb-text), .05);
  color: var(--color-text);
}

.site-nav a[aria-current="page"] {
  background: var(--color-panel-soft);
  box-shadow: inset 0 0 0 1px rgba(var(--rgb-text), .05);
  color: var(--color-text);
  font-weight: 700;
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

.login-link {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  justify-content: center;
  padding-inline: 17px;
  border: 1.5px solid var(--color-text);
  border-radius: var(--radius-small);
  color: var(--color-text);
  font-size: 14px;
  font-weight: 750;
}

.login-link:hover {
  background: var(--color-text);
  color: var(--color-panel);
}

.language-menu {
  position: relative;
}

.language-toggle {
  display: inline-flex;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding-inline: 8px;
  border-radius: var(--radius-small);
  background: transparent;
  color: var(--color-text-muted);
  font-size: 13px;
}

.language-toggle svg {
  width: 12px;
  height: 12px;
}

.language-list {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 160px;
  padding: 8px;
  visibility: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  background: var(--color-panel);
  box-shadow: var(--shadow-panel);
  opacity: 0;
  transform: translateY(-5px);
  transition: opacity .18s ease, transform .18s ease, visibility .18s ease;
}

.language-menu.is-open .language-list {
  visibility: visible;
  opacity: 1;
  transform: none;
}

.language-list a {
  display: flex;
  min-height: 40px;
  align-items: center;
  padding-inline: 10px;
  border-radius: var(--radius-small);
  color: var(--color-text-muted);
  font-size: 14px;
}

.language-list a:hover,
.language-list a[aria-current="true"] {
  background: var(--color-panel-soft);
  color: var(--color-text);
}

.menu-toggle {
  display: none;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-small);
  background: var(--color-panel-soft);
}

.menu-toggle svg {
  width: 22px;
  height: 22px;
}

.mobile-nav {
  display: none;
}

.mobile-veil {
  display: none;
}

.site-footer {
  position: relative;
  margin-top: 80px;
  overflow-x: clip;
  background: var(--color-text);
  color: var(--color-panel);
}

.footer-main {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1.1fr;
  gap: 56px;
  padding-top: 64px;
  padding-bottom: 48px;
}

.footer-brand {
  min-width: 0;
}

.footer-brand .site-brand {
  color: var(--color-panel);
}

.footer-brand p {
  max-width: 380px;
  margin-top: 18px;
  color: var(--color-border);
}

.footer-title {
  margin-bottom: 16px;
  color: var(--color-panel);
  font-size: 14px;
  font-weight: 800;
}

.footer-links {
  display: grid;
  gap: 7px;
}

.footer-links a {
  display: inline-flex;
  min-height: 30px;
  align-items: center;
  color: var(--color-border);
  font-size: 14px;
}

.footer-links a:hover {
  color: var(--color-accent);
}

.footer-keywords,
.footer-languages {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.footer-keywords a,
.footer-languages a {
  display: inline-flex;
  min-height: 30px;
  align-items: center;
  padding-inline: 10px;
  border: 1px solid rgba(var(--rgb-white), .16);
  border-radius: var(--radius-pill);
  color: var(--color-border);
  font-size: 12px;
}

.footer-keywords a:hover,
.footer-languages a:hover,
.footer-languages a[aria-current="true"] {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.footer-bottom {
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-top: 1px solid rgba(var(--rgb-white), .12);
  color: var(--color-border);
  font-size: 13px;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.footer-legal a:hover {
  color: var(--color-accent);
}

#server-status {
  position: relative;
  display: block;
  width: 100%;
  max-width: 100%;
  margin-bottom: 32px;
  overflow: hidden;
}

#server-status + * {
  margin-top: 32px;
}

body:has(.toc-tabs) section[id] {
  scroll-margin-top: var(--toc-offset);
}

@media (max-width: 1120px) {
  .site-nav a {
    padding-inline: 9px;
    font-size: 13px;
  }

  .header-inner {
    gap: 14px;
  }

  .language-toggle span {
    display: none;
  }
}

@media (max-width: 940px) {
  .site-nav {
    display: none;
  }

  .header-tools {
    margin-left: auto;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .mobile-nav {
    position: fixed;
    z-index: 52;
    top: var(--header-height);
    right: 0;
    left: 0;
    display: block;
    max-height: calc(100dvh - var(--header-height));
    padding: 14px var(--gutter) 24px;
    overflow-y: auto;
    visibility: hidden;
    background: var(--color-panel);
    box-shadow: 0 24px 44px -22px rgba(var(--rgb-text), .35);
    opacity: 0;
    transform: translateY(-8px);
    overscroll-behavior: contain;
    transition: opacity .2s ease, transform .2s ease, visibility .2s ease;
  }

  .mobile-nav.is-open {
    visibility: visible;
    opacity: 1;
    transform: none;
  }

  .mobile-nav ul {
    display: grid;
    gap: 3px;
    list-style: none;
  }

  .mobile-nav a {
    display: flex;
    width: 100%;
    min-height: 46px;
    align-items: center;
    padding: 10px 12px;
    border-radius: var(--radius-small);
    color: var(--color-text-muted);
    font-weight: 650;
  }

  .mobile-nav a:hover,
  .mobile-nav a[aria-current="page"] {
    background: var(--color-panel-soft);
    color: var(--color-text);
  }

  .mobile-nav-languages {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--color-border);
  }

  .mobile-veil {
    position: fixed;
    z-index: 49;
    inset: var(--header-height) 0 0;
    display: block;
    visibility: hidden;
    background: rgba(var(--rgb-text), .22);
    opacity: 0;
    transition: opacity .2s ease, visibility .2s ease;
  }

  .mobile-veil.is-open {
    visibility: visible;
    opacity: 1;
  }

  .footer-main {
    grid-template-columns: 1fr 1fr;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  :root {
    --section-space: 72px;
  }

  h1 {
    font-size: clamp(34px, 9vw, 40px);
  }

  h2 {
    font-size: clamp(30px, 8vw, 38px);
  }

  .section-head p {
    font-size: 16px;
  }

  .footer-main {
    gap: 36px;
  }
}

@media (max-width: 640px) {
  :root {
    --gutter: 16px;
    --header-height: 64px;
  }

  .no-break {
    white-space: normal;
  }

  .tilt-card,
  [data-tilt-card],
  .decorative-tilt {
    transform: none !important;
  }

  .wrap {
    padding-inline: var(--gutter);
  }

  .panel,
  .card {
    padding: 20px;
  }

  .language-menu {
    display: none;
  }

  .login-link {
    min-height: 38px;
    padding-inline: 13px;
  }

  .brand-word {
    font-size: 17px;
  }

  .site-brand img {
    width: 30px;
    height: 30px;
    flex-basis: 30px;
  }

  .footer-main {
    grid-template-columns: 1fr;
    padding-top: 48px;
  }

  .footer-brand {
    grid-column: auto;
  }

  .footer-bottom {
    align-items: flex-start;
    flex-direction: column;
    padding-top: 20px;
    padding-bottom: 24px;
  }

  .section {
    padding-top: 68px;
    padding-bottom: 68px;
  }

  .absolute-decor,
  .stripe-halo,
  .section-glow {
    max-width: 100%;
  }
}

@media (max-width: 360px) {
  .brand-word {
    font-size: 16px;
  }

  .login-link {
    padding-inline: 10px;
  }

  .header-inner {
    gap: 8px;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }

  .reveal,
  .reveal.pending,
  .reveal.shown {
    opacity: 1;
    transform: none;
  }
}