:root {
  --ink: #1d1430;
  --night: #171433;
  --panel: #2a2257;
  --panel-deep: #1f1946;
  --edge: #6e64b8;
  --paper: #ffffff;
  --muted: #b9b2dd;
  --pink: #ff8fbd;
  --yellow: #ffd84a;
  --pixel: "DotGothic16", monospace;
  --text: system-ui, -apple-system, "Hiragino Sans", "Noto Sans JP", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--night);
  color: var(--paper);
  font-family: var(--text);
  font-size: 16px;
  line-height: 1.9;
}

a {
  color: var(--pink);
}

h1,
h2,
.site-name,
.btn,
.crumbs,
.element-link,
.element-head,
.element-noun,
.faq dt,
.site-footer {
  font-family: var(--pixel);
}

h1 {
  margin: 0 0 16px;
  font-weight: normal;
  font-size: clamp(24px, 6vw, 32px);
  line-height: 1.4;
  color: var(--yellow);
}

h2 {
  margin: 0 0 8px;
  font-weight: normal;
  font-size: 19px;
  color: var(--pink);
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  max-width: 760px;
  margin: 0 auto;
  padding: 16px;
}

.site-name {
  color: var(--paper);
  font-size: 18px;
  text-decoration: none;
}

.page {
  display: grid;
  gap: 16px;
  max-width: 760px;
  margin: 0 auto;
  padding: 8px 16px 32px;
}

.page > p {
  margin: 0;
}

.window {
  display: block;
  padding: 16px 18px;
  background: var(--panel);
  border: 4px solid var(--ink);
  box-shadow:
    inset 0 0 0 4px var(--edge),
    0 4px 0 var(--ink);
}

.window p,
.window ul,
.window ol {
  margin: 0;
}

.window p + p {
  margin-top: 8px;
}

.window ul,
.window ol {
  padding-left: 1.4em;
}

.mascot {
  background: var(--panel-deep);
}

.mascot p::before {
  content: "ノウちゃん「";
  font-family: var(--pixel);
  color: var(--yellow);
}

.mascot p::after {
  content: "」";
  font-family: var(--pixel);
  color: var(--yellow);
}

.btn {
  display: inline-block;
  padding: 8px 20px 10px;
  color: var(--ink);
  background: var(--paper);
  text-decoration: none;
  border: 4px solid var(--ink);
  box-shadow: inset 0 -4px 0 #c9c2ea;
}

.btn.primary {
  background: var(--yellow);
  box-shadow: inset 0 -4px 0 #d4a20f;
}

.btn.small {
  padding: 2px 12px 4px;
  font-size: 14px;
}

.btn:active {
  box-shadow: none;
  transform: translateY(2px);
}

.btn:focus-visible,
a:focus-visible {
  outline: 3px dashed var(--yellow);
  outline-offset: 3px;
}

.cta {
  margin: 8px 0 0;
  text-align: center;
}

.crumbs {
  font-size: 13px;
  color: var(--muted);
}

.chip {
  display: inline-grid;
  place-items: center;
  width: 1.6em;
  height: 1.6em;
  margin-right: 0.4em;
  font-family: var(--pixel);
  line-height: 1;
  color: var(--paper);
  border: 3px solid var(--ink);
  text-shadow:
    2px 0 var(--ink),
    -2px 0 var(--ink),
    0 2px var(--ink),
    0 -2px var(--ink);
  vertical-align: middle;
}

.element-title {
  display: flex;
  align-items: center;
}

.checks {
  list-style: none;
  padding-left: 0;
}

.checks li::before {
  content: "☑ ";
  color: var(--yellow);
}

.element-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.element-link {
  color: var(--paper);
  text-decoration: none;
}

.element-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.element-grid a {
  height: 100%;
  color: var(--paper);
  text-decoration: none;
}

.element-grid a:hover {
  filter: brightness(1.12);
}

.element-head {
  display: flex;
  align-items: center;
  font-size: 17px;
}

.element-noun {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  color: var(--muted);
}

.lead {
  font-size: 17px;
}

.column-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.column-list a {
  color: var(--paper);
  text-decoration: none;
}

.column-list a:hover {
  filter: brightness(1.12);
}

.column-title {
  display: block;
  font-family: var(--pixel);
  font-size: 18px;
  color: var(--yellow);
}

.column-description {
  display: block;
  margin-top: 4px;
  font-size: 14px;
  color: var(--muted);
}

.faq {
  display: grid;
  gap: 12px;
  margin: 0;
}

.faq dt {
  color: var(--yellow);
}

.faq dt::before {
  content: "Q. ";
}

.faq dd {
  margin: 4px 0 0;
}

.table {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 4px 16px;
  margin: 0;
}

.table dt {
  color: var(--muted);
}

.table dd {
  margin: 0;
}

.note {
  font-size: 13px;
  color: var(--muted);
}

.site-footer {
  padding: 24px 16px 32px;
  text-align: center;
  font-size: 13px;
  color: var(--muted);
  border-top: 4px solid var(--panel);
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 4px 16px;
}

.site-footer a {
  color: var(--muted);
}

.site-footer p {
  margin: 12px 0 0;
}