*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-padding-top: calc(var(--header) + 16px); }
html.lenis, html.lenis body { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto !important; }
.lenis.lenis-stopped { overflow: hidden; }
body {
  margin: 0; background: var(--page-bg); color: var(--ink);
  font-family: var(--ja); font-size: var(--fs-md); line-height: 1.9; letter-spacing: 0.02em;
  -webkit-font-smoothing: antialiased; overflow-x: clip;
  font-feature-settings: 'palt' 0;
}
img, svg { display: block; max-width: 100%; }
/* 日本語は文節で改行する（build.mjs が文節の切れ目に幅のない空白を入れている）。入りきらない長い語だけは途中で折る */
body { word-break: keep-all; overflow-wrap: anywhere; }
input, textarea, select { word-break: normal; }
h1, h2, h3 { text-wrap: balance; }
p, li, dd { text-wrap: pretty; }
img { height: auto; }
h1, h2, h3, h4, p, ol, ul, dl, dd, figure, fieldset { margin: 0; }
ol, ul { padding: 0; list-style: none; }
fieldset { border: 0; padding: 0; min-width: 0; }
a { color: inherit; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
table { border-collapse: collapse; }
::selection { background: var(--ink); color: var(--white); }
.num { font-family: var(--num); font-variant-numeric: tabular-nums; letter-spacing: 0.01em; }
.mono { font-family: var(--mono); font-size: var(--fs-xs); letter-spacing: 0.02em; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: 12px; top: -80px; z-index: 300; padding: 10px 16px; background: var(--ink); color: var(--white); font-weight: 700; }
.skip:focus { top: 12px; }
:focus-visible { outline: 2px solid var(--shu); outline-offset: 3px; }
.wrap { width: 100%; max-width: calc(var(--max) + var(--pad) * 2); margin: 0 auto; padding: 0 var(--pad); }

/* 方眼の地（図面の紙） */
.grid-paper {
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid-strong) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-strong) 1px, transparent 1px),
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 120px 120px, 120px 120px, 24px 24px, 24px 24px;
}

/* 演出の初期状態（JSが動くときだけ隠す。動かないときは見せたまま） */
.js-motion [data-reveal='fade-up'], .js-motion [data-reveal='fade-left'], .js-motion [data-reveal='stagger-item'] { opacity: 0; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 1ms !important; animation-iteration-count: 1 !important; transition-duration: 1ms !important; }
}