:root {
  /* 既存サイトから採取した濃紺を軸に据える */
  --navy:        #002B6A;
  --navy-deep:   #001936;
  --navy-soft:   #143f86;
  --ember:       #C4701A;   /* ロゴの紙吹雪から取った琥珀 */
  --ember-bright:#E2892B;

  --ink:         #11181F;   /* 既存の本文色 */
  --ink-soft:    #46536280;
  --ink-muted:   #4B5A6B;
  --paper:       #FFFFFF;
  --mist:        #EDF1F7;   /* 無彩色ではなく紺寄りの中間色 */
  --line:        #D2DBE8;
  --band:        #F5F8FC;

  --sans:  "IBM Plex Sans", "Noto Sans JP", "Hiragino Sans", "Yu Gothic UI", sans-serif;
  --display: "DM Sans", "Noto Sans JP", "Hiragino Sans", "Yu Gothic UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;

  --wrap: 880px;

  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --navy:       #0A3577;
    --navy-deep:  #050D1A;
    --navy-soft:  #2E5CA8;
    --ember:      #F0A44A;
    --ember-bright:#F7BD72;

    --ink:        #E6ECF5;
    --ink-soft:   #93A3B980;
    --ink-muted:  #9BABC0;
    --paper:      #080F1D;
    --mist:       #101B2E;
    --line:       #22334D;
    --band:       #0C1526;
  }
}

:root[data-theme="dark"] {
  --navy:       #0A3577;
  --navy-deep:  #050D1A;
  --navy-soft:  #2E5CA8;
  --ember:      #F0A44A;
  --ember-bright:#F7BD72;

  --ink:        #E6ECF5;
  --ink-soft:   #93A3B980;
  --ink-muted:  #9BABC0;
  --paper:      #080F1D;
  --mist:       #101B2E;
  --line:       #22334D;
  --band:       #0C1526;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; }

a { color: inherit; }

:focus-visible {
  outline: 2px solid var(--ember-bright);
  outline-offset: 3px;
  border-radius: 2px;
}

.wrap {
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: 24px;
}

/* ---------- ヘッダー ---------- */

.masthead {
  background: var(--navy);
  color: #fff;
  padding-block: 34px 26px;
}

.masthead .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  margin-right: auto;
}

.brand img {
  width: 52px;
  height: auto;
  display: block;
}

.brand span {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(28px, 5vw, 40px);
  letter-spacing: -0.02em;
  line-height: 1;
  color: #fff;
}

.nav {
  display: flex;
  gap: 26px;
  font-size: 15px;
  font-weight: 600;
}

.nav a {
  color: #C8D6EE;
  text-decoration: none;
  padding-block: 4px;
  border-bottom: 2px solid transparent;
  transition: color .15s, border-color .15s;
}

.nav a:hover,
.nav a[aria-current="page"] {
  color: #fff;
  border-bottom-color: var(--ember-bright);
}

/* ---------- セクション ---------- */

main { padding-block: 56px 0; }

.section + .section { margin-top: 56px; }

.section-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 22px;
}

.section-head h1,
.section-head h2 {
  font-family: var(--display);
  font-size: 21px;
  font-weight: 700;
  letter-spacing: 0.01em;
  margin: 0;
  white-space: nowrap;
}

.section-head::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

/* ---------- ゲーム（枠を持つ唯一の要素） ---------- */

.game {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  align-items: center;
  border: 1px solid var(--navy);
  padding: 22px;
  background: var(--paper);
}

.game__icon {
  width: 104px;
  height: 104px;
  border-radius: 22px;
  display: block;
  flex-shrink: 0;
  border: 1px solid var(--line);
}

.game__body {
  flex: 1 1 300px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.game__title {
  font-family: var(--display);
  font-size: 26px;
  font-weight: 700;
  margin: 0;
  letter-spacing: 0.01em;
}

.stores {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.stores a {
  display: block;
  transition: opacity .15s;
}

.stores a:hover { opacity: .8; }

.stores img {
  height: 44px;
  width: auto;
  display: block;
}

/* ---------- 紹介 ---------- */

.lede {
  font-size: 18px;
  margin: 0;
  max-width: 60ch;
}

.tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ember);
  border: 1px solid var(--ember);
  padding: 2px 9px;
  margin-bottom: 14px;
}

/* ---------- 連絡先 ---------- */

.contact {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 32px;
}

.contact a {
  display: inline-flex;
  align-items: baseline;
  gap: 9px;
  text-decoration: none;
  font-weight: 500;
  border-bottom: 1px solid var(--line);
  padding-bottom: 3px;
  transition: border-color .15s;
}

.contact a:hover { border-bottom-color: var(--ember-bright); }

.contact .label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

/* 連絡先ページのみ、導入文のすぐ下に連絡先が並ぶ */
.lede + .contact { margin-top: 22px; }

/* ---------- フッター ---------- */

.foot {
  margin-top: 64px;
  border-top: 1px solid var(--line);
  padding-block: 22px 30px;
  font-size: 13px;
  color: var(--ink-muted);
}

/* ---------- 本文ページ（プライバシーポリシー） ---------- */

.langs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin-bottom: 44px;
  padding: 0;
  list-style: none;
}

.langs a {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-decoration: none;
  color: var(--ink-muted);
  border: 1px solid var(--line);
  padding: 4px 11px;
  transition: color .15s, border-color .15s;
}

.langs a:hover {
  color: var(--ember);
  border-color: var(--ember);
}

.prose {
  max-width: 68ch;
  scroll-margin-top: 24px;
}

.prose h3 {
  font-family: var(--display);
  font-size: 17px;
  font-weight: 700;
  margin: 32px 0 6px;
  letter-spacing: 0.01em;
}

.prose p {
  margin: 0 0 14px;
}

.prose ul {
  margin: 0 0 14px;
  padding-left: 1.2em;
}

.prose li {
  margin-bottom: 4px;
}

.prose .note {
  font-size: 14px;
  color: var(--ink-muted);
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}

@media (max-width: 560px) {
  .masthead .wrap { gap: 14px; }
  .brand { margin-right: 0; width: 100%; }
  .nav { gap: 18px; font-size: 14px; }
  .game { padding: 18px; }
  .game__icon { width: 84px; height: 84px; border-radius: 18px; }
}