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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--step-body);
  line-height: var(--lh-body);
  letter-spacing: var(--track-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: clip;
}

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

ul,
ol {
  padding: 0;
  list-style: none;
}

h1,
h2,
h3 {
  font-weight: 400;
  line-height: var(--lh-head);
  letter-spacing: var(--track-head);
  text-wrap: balance;
}

p,
li {
  text-wrap: pretty;
}

:root:lang(ja) :is(h1, h2, h3, summary, .ledger .cap b, .bands .what b) {
  word-break: auto-phrase;
  overflow-wrap: break-word;
}

:root:lang(ko) body {
  word-break: keep-all;
  overflow-wrap: break-word;
}

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

code,
pre,
kbd {
  font-family: var(--font-mono);
  font-size: var(--ui-s);
  letter-spacing: 0;
}

:not(pre)>code {
  font-size: max(13px, 0.88em);
  padding: 0.08em 0.32em;
  border-radius: 3px;
  background: var(--surface);
  overflow-wrap: anywhere;
}

a {
  color: inherit;
  text-decoration-line: underline;
  text-decoration-thickness: 0.07em;
  text-underline-offset: 0.24em;
  text-decoration-color: color-mix(in srgb, currentColor 55%, transparent);
  transition: text-decoration-color var(--t-hover) ease;
}

@media (hover: hover) and (pointer: fine) {
  a:hover {
    text-decoration-color: currentColor;
  }
}

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

button {
  cursor: pointer;
}

:where(a, button, input, select, textarea, summary, [tabindex]):focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
  border-radius: 2px;
}

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

.tk {
  white-space: nowrap;
}

.vh:where(:not(:focus-within, :active)) {
  position: absolute !important;
  clip-path: inset(50%) !important;
  overflow: hidden !important;
  width: 1px !important;
  height: 1px !important;
  margin: -1px !important;
  padding: 0 !important;
  border: 0 !important;
  white-space: nowrap !important;
}

.skip {
  position: fixed;
  z-index: 50;
  left: max(var(--margin), env(safe-area-inset-left, 0px));
  top: calc(env(safe-area-inset-top, 0px) + 12px);
  padding: 10px 14px;
  background: var(--ink);
  color: var(--bg);
  border-radius: var(--radius);
  font-size: var(--step-small);
  text-decoration: none;
  transform: translateY(-160%);
  transition: transform var(--t-ui) var(--ease-out);
}

.skip:focus-visible {
  transform: none;
}

.wrap {
  max-width: 1680px;
  margin-inline: auto;
  padding-left: max(var(--margin), env(safe-area-inset-left, 0px));
  padding-right: max(var(--margin), env(safe-area-inset-right, 0px));
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gap);
}

.soft {
  color: var(--muted);
}

.sec-title {
  font-size: var(--step-head);
}

.lede {
  font-size: var(--step-lead);
  line-height: 1.6;
  max-width: 34em;
}

:root:lang(en) .lede {
  line-height: 1.45;
}

.link-arrow {
  font-size: var(--step-small);
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  gap: 0.4em;
  align-items: center;
  min-height: 44px;
}

.link-arrow span {
  transition: transform var(--t-hover) var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
  .link-arrow:hover span {
    transform: translateX(4px);
  }

  .link-arrow:hover {
    text-decoration: underline;
    text-decoration-thickness: 0.07em;
    text-underline-offset: 0.24em;
  }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  min-height: 48px;
  padding: 0 22px;
  border: 0;
  border-radius: var(--radius);
  font-size: var(--step-small);
  font-weight: 600;
  letter-spacing: 0.01em;
  white-space: nowrap;
  transition: transform var(--t-press) var(--ease-out), background-color var(--t-hover) ease, color var(--t-hover) ease;
}

.btn:active {
  transform: scale(0.97);
}

.btn-accent {
  background: var(--accent);
  color: var(--accent-ink);
}

@media (hover: hover) and (pointer: fine) {
  .btn-accent:hover {
    background: color-mix(in srgb, var(--accent) 82%, var(--ink));
  }
}

[hidden] {
  display: none !important;
}

.top .wrap {
  align-items: center;
  padding-top: clamp(24px, 4vh, 44px);
}

.wordmark {
  grid-column: 4 / span 4;
  font-weight: 600;
  font-size: var(--step-small);
  letter-spacing: 0.01em;
  text-decoration: none;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  justify-self: start;
}

.mark {
  display: block;
  flex: none;
}

.wordmark .mark {
  width: 34px;
  height: 34px;
  transition: transform var(--t-ui) var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
  .wordmark:hover .mark {
    transform: rotate(-6deg) scale(1.06);
  }
}

.top-links {
  grid-column: 8 / -1;
  justify-self: end;
  display: flex;
  gap: clamp(16px, 2vw, 28px);
  align-items: center;
  font-size: var(--step-small);
}

.top-links a,
.lang-btn,
.theme-btn {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

@media (hover: hover) and (pointer: fine) {

  .top-links a:hover,
  .lang-btn:hover {
    text-decoration: underline;
    text-decoration-thickness: 0.07em;
    text-underline-offset: 0.24em;
  }
}

html:not(.js) :is(.lang, .theme) {
  display: none;
}

.js .nojs {
  display: none;
}

html:not(.js) :is([data-copy], [data-ui] .seg, #dlg-runner, .checker-stage, .checker-foot:not(.nojs)) {
  display: none;
}

:is(.lang, .theme) {
  position: relative;
}

.lang-btn {
  gap: 0.45em;
  background: none;
  border: 0;
  padding: 0;
  font-size: var(--step-small);
  font-weight: 600;
  white-space: nowrap;
  anchor-name: --lang;
}

.lang-btn svg {
  width: 10px;
  height: 6px;
  flex: none;
  transition: transform var(--t-ui) var(--ease-out);
}

.lang:has(.lang-list:popover-open) .lang-btn svg {
  transform: rotate(180deg);
}

.lang-btn[aria-expanded="true"] svg {
  transform: rotate(180deg);
}

.theme-btn {
  justify-content: center;
  min-width: 44px;
  background: none;
  border: 0;
  padding: 0;
  anchor-name: --theme;
}

.theme-btn svg {
  display: none;
  width: 18px;
  height: 18px;
  flex: none;
}

.theme-btn[data-choice="system"] [data-icon="system"],
.theme-btn[data-choice="light"] [data-icon="light"],
.theme-btn[data-choice="dark"] [data-icon="dark"] {
  display: block;
}

:is(.lang-list, .theme-list) {
  position: absolute;
  z-index: 30;
  inset: auto;
  top: 100%;
  right: 0;
  margin: 0;
  padding: 6px;
  min-width: 176px;
  overflow: visible;
  background: var(--bg);
  color: var(--ink);
  border: 1px solid var(--rule);
  border-radius: 8px;
  box-shadow: 0 1px 2px rgb(16 32 24 / 0.06), 0 18px 40px -14px rgb(16 32 24 / 0.26);
}

@supports (anchor-name: --lang) {
  .lang-list {
    position-anchor: --lang;
    top: anchor(bottom);
    right: anchor(right);
    margin-top: 4px;
  }

  .theme-list {
    position-anchor: --theme;
    top: anchor(bottom);
    right: anchor(right);
    margin-top: 4px;
  }
}

:is(.lang-list, .theme-list) li+li {
  margin-top: 2px;
}

:is(.lang-list, .theme-list) button {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 44px;
  padding: 0 12px;
  border: 0;
  border-radius: var(--radius);
  background: none;
  font-size: var(--step-small);
  text-align: left;
  white-space: nowrap;
  transition: background-color var(--t-hover) ease;
}

:is(.lang-list, .theme-list) button[aria-current="true"] {
  font-weight: 600;
}

:is(.lang-list, .theme-list) button[aria-current="true"]::after {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: inset 0 0 0 1.5px var(--ink);
}

@media (hover: hover) and (pointer: fine) {
  :is(.lang-list, .theme-list) button:hover {
    background: var(--surface);
  }
}

.foot {
  padding-top: clamp(140px, 30svh, 280px);
}

.foot-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: baseline;
  gap: 12px 24px;
  padding-bottom: calc(env(safe-area-inset-bottom, 0px) + 30px);
  font-size: var(--step-small);
  color: var(--muted);
}

.foot-row nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 24px;
  justify-content: center;
}

.foot-row nav a {
  color: var(--ink);
  text-decoration: none;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

@media (hover: hover) and (pointer: fine) {
  .foot-row nav a:hover {
    text-decoration: underline;
    text-underline-offset: 0.24em;
  }
}

.foot-row p:last-child {
  text-align: right;
}

.foot-row .by {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
}

.foot-row .by span {
  align-self: baseline;
}

.foot-row .mark {
  width: 24px;
  height: 24px;
}

@media (max-width: 1023px) {
  .top .wrap {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    column-gap: var(--gap);
  }

  .top-links {
    margin-left: auto;
  }

  .top-links a {
    white-space: nowrap;
  }
}

@media (max-width: 640px) {
  .grid {
    column-gap: 0;
  }

  .foot-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }

  .foot-row nav {
    justify-content: flex-start;
  }

  .foot-row p:last-child {
    text-align: left;
  }

  .foot-row .by {
    justify-content: flex-start;
  }
}