/* ==========================================================================
   基本 ― リセット・地の文・フォーカス・スキップリンク・共通レイアウト
   ========================================================================== */

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--surface-page);
  color: var(--text-body);
  font-family: var(--font-sans);
  font-size: var(--text-body-size);
  line-height: var(--leading-body);
  letter-spacing: var(--tracking-body);
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "palt" 0;
}

h1, h2, h3, h4 {
  margin: 0;
  color: var(--text-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  font-feature-settings: "palt" 1;
}

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

a {
  color: var(--link);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-out);
}
a:hover {
  color: var(--link-hover);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

img { max-width: 100%; display: block; }
figure { margin: 0; }
::selection { background: var(--accent-soft); }

/* --------------------------------------------------------------------------
   フォーカス表示 ― ★変更禁止・outline:none 禁止
   -------------------------------------------------------------------------- */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
  box-shadow: 0 0 0 6px var(--focus-ring-outer);
  border-radius: 2px;
}

/* スキップリンク ― 最初の Tab 対象。キーボード操作の入口 */
.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 200;
  padding: 12px 20px;
  background: var(--surface-inverse);
  color: #FFFFFF;
  font-size: var(--text-sm);
  text-decoration: none;
  border-radius: 0 0 6px 0;
}
.skip:focus { left: 0; }
.skip:hover { color: #FFFFFF; }

/* --------------------------------------------------------------------------
   共通レイアウト
   -------------------------------------------------------------------------- */
.wrap {
  max-width: var(--container-max);
  margin-inline: auto;
}
.wrap--wide { max-width: var(--container-wide); }
.wrap--narrow { max-width: var(--container-narrow); }

.sec { padding: var(--section-gap-lg) var(--gutter); }
.sec--md { padding: var(--section-gap-md) var(--gutter); }
.sec--sm { padding: var(--section-gap-sm) var(--gutter); }
.sec--pb-lg { padding-bottom: var(--section-gap-lg); }
.sec--top0 { padding-top: 0; }
.sec--bottom0 { padding-bottom: 0; }
.sec--alt { background: var(--surface-alt); }
.sec--gap-lg { margin-top: var(--section-gap-lg); }
.sec--clip { overflow: hidden; }
.sec--clip-x { overflow-x: clip; }   /* sticky を壊さない横あふれ止め */
.sec--rel { position: relative; }

.stack-6 > * + * { margin-top: var(--space-6); }
.row-end {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-5);
  flex-wrap: wrap;
}

/* --------------------------------------------------------------------------
   表示アニメーション（reveal.js が .on を付ける）
   -------------------------------------------------------------------------- */
.hx-rv {
  opacity: 0;
  transform: translateY(var(--reveal-shift));
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.hx-rv.on { opacity: 1; transform: none; }

.hx-mask {
  clip-path: inset(0 100% 0 0);
  transition: clip-path 0.9s var(--ease-out);
}
.hx-mask.on { clip-path: inset(0 0 0 0); }

.d-08 { transition-delay: 0.08s; }
.d-10 { transition-delay: 0.10s; }
.d-12 { transition-delay: 0.12s; }
.d-16 { transition-delay: 0.16s; }
.d-18 { transition-delay: 0.18s; }
.d-22 { transition-delay: 0.22s; }
.d-24 { transition-delay: 0.24s; }
.d-30 { transition-delay: 0.30s; }
.d-06 { transition-delay: 0.06s; }

@keyframes hx-drift {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}
@keyframes hx-dash { to { stroke-dashoffset: -140; } }

.hx-anim { animation-name: hx-drift; animation-timing-function: ease-in-out; animation-iteration-count: infinite; }
.hx-anim--7 { animation-duration: 7s; }
.hx-anim--8 { animation-duration: 8s; }
.hx-anim--9 { animation-duration: 9s; }
.hx-anim--11 { animation-duration: 11s; }
.hx-dash-path { animation: hx-dash 3s linear infinite; }

/* ★止まらない infinite アニメを残さない */
@media (prefers-reduced-motion: reduce) {
  .hx-rv,
  .hx-mask {
    opacity: 1;
    transform: none;
    clip-path: none;
    transition: none;
    animation: none !important;
  }
  .hx-anim,
  .hx-dash-path { animation: none !important; }
  html { scroll-behavior: auto; }
}

/* --------------------------------------------------------------------------
   文字まわりの共通クラス
   -------------------------------------------------------------------------- */
.eyebrow {
  display: block;
  font-family: var(--font-latin);
  font-size: var(--text-eyebrow);
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 0 0 var(--stack-eyebrow);
}
.lead {
  font-size: var(--text-lead);
  line-height: var(--leading-body);
  color: var(--text-muted);
  max-width: 38em;
}
.body { font-size: var(--text-body-size); line-height: var(--leading-body); color: var(--text-body); }
.body--muted { color: var(--text-muted); }
.note { font-size: var(--text-xs); line-height: 1.8; color: var(--text-faint); }
.small { font-size: var(--text-sm); line-height: 1.9; color: var(--text-muted); }
.latin { font-family: var(--font-latin); letter-spacing: var(--tracking-latin); }
.hx-mark { background: linear-gradient(to left, transparent 60%, var(--sun) 60%); padding: 2px 0; }
.hx-mark--u { background: linear-gradient(transparent 62%, var(--sun) 62%); padding: 0 2px; }
.hx-vert { writing-mode: vertical-rl; font-feature-settings: "palt" 1; }
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* 1023px 以下でだけ隠す装飾（PC専用の飾り） */
@media (max-width: 1023px) {
  .hx-desk { display: none !important; }
  .hx-vert {
    writing-mode: horizontal-tb;
    height: auto !important;
    line-height: 1.4;
    letter-spacing: 0.03em;
  }
  .hx-mark { background: linear-gradient(transparent 62%, var(--sun) 62%); }
}