/* 全体の配色、余白、キーボード操作時の表示。 */
:root {
  color-scheme: dark;
  --background: #050b10;
  --panel: #0a1116;
  --text: #f7f8fa;
  --muted: #d6d9dc;
  --accent: #e00079;
  --border: #293039;
  --gutter: clamp(20px, 3.8vw, 56px);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; }
img { display: block; max-width: 100%; }
h1, h2, h3, p { margin: 0; }
a:focus-visible, button:focus-visible { outline: 2px solid #fff; outline-offset: 5px; }
[hidden] { display: none !important; }
.container { width: min(100% - var(--gutter) * 2, 1360px); margin-inline: auto; }
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}
.display-filters { position: absolute; pointer-events: none; }
.skip-link { position: absolute; top: -80px; left: 16px; z-index: 20; padding: 12px 20px; background: #fff; color: #111; }
.skip-link:focus { top: 12px; }

/* 公式DOME画像のスクリーン部分を背景として使う。 */
.masthead {
  position: relative;
  isolation: isolate;
  background: #020911;
}
.masthead::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: 0;
  background-image: linear-gradient(90deg, #02080fe8 0%, #02080faa 34%, #02080f18 70%), linear-gradient(0deg, #02080f88, transparent 55%), url("../img/home/dome-venue_shared_reality.webp");
  background-size: cover, cover, 170% auto;
  background-position: center, center, right 20%;
  background-repeat: no-repeat;
}
.site-header { position: relative; display: flex; justify-content: space-between; align-items: center; min-height: 90px; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 13px; flex-shrink: 0; }
.brand img { width: 46px; height: 46px; object-fit: contain; }
/* NEXIA Adsの字体・太さは、ヘッダーのNEXIAと共通にする。 */
.brand span, .wordmark--ads { font-family: Arial, sans-serif; font-weight: 700; }
.brand span { font-size: 36px; letter-spacing: .055em; }
.desktop-nav { display: flex; align-items: center; gap: clamp(20px, 2.2vw, 32px); font-size: 14px; font-weight: 600; }
.desktop-nav > a:not(.button):hover { color: #f47ab8; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 20px; min-height: 52px; padding: 12px 26px; border: 1px solid transparent; border-radius: 2px; font-size: 16px; font-weight: 600; line-height: 1.5; transition: background-color .18s, border-color .18s; }
.button span { font-family: Arial, sans-serif; font-size: 20px; line-height: 1; }
.button--header { min-height: 44px; padding: 9px 20px; border-color: #aeb4bf; font-size: 13px; }
.button--header:hover { background: #ffffff15; border-color: #fff; }
.hero { padding-top: 30px; padding-bottom: 34px; }
.hero h1 { font-size: clamp(42px, 5.25vw, 76px); font-weight: 900; letter-spacing: -.04em; line-height: 1.16; }

/* モバイル用のナビゲーション。 */
.menu-toggle { display: none; align-items: center; gap: 12px; padding: 12px 0 12px 12px; border: 0; background: transparent; color: #fff; font-size: 12px; cursor: pointer; }
.menu-lines { position: relative; display: block; width: 23px; height: 14px; border-top: 1px solid currentColor; border-bottom: 1px solid currentColor; }
.menu-lines::after { content: ""; position: absolute; top: 5px; left: 0; width: 23px; height: 1px; background: currentColor; }
.mobile-nav { position: absolute; top: calc(100% - 1px); right: 0; left: 0; z-index: 10; padding: 12px; background: #070d13; border: 1px solid #343b44; box-shadow: 0 15px 30px #0008; }
.mobile-nav a { display: block; padding: 14px 16px; font-size: 15px; font-weight: 600; }
.mobile-nav a:hover { background: #ffffff0d; }

/* VIDEOとDOMEは同じ大きさで配置し、写真と見出しを一組にする。 */
.featured-services { display: grid; gap: 16px; padding-top: 0; }
.feature { display: grid; grid-template-columns: 1fr 1fr; min-height: 326px; background: #060d13; border: 1px solid #1c2630; }
.feature-visual { position: relative; min-width: 0; overflow: hidden; }
.feature-visual img { position: absolute; width: 100%; height: 100%; object-fit: cover; object-position: 43% center; }
.feature-visual::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, transparent 78%, #060d13); pointer-events: none; }
.feature-visual--video img { object-position: center 40%; }
.feature-copy { align-self: center; padding: 36px 30px; }
.feature-name { position: relative; margin-bottom: 18px; padding-bottom: 16px; font-size: 22px; font-weight: 700; line-height: 1.3; }
.feature-name::after { content: ""; position: absolute; bottom: 0; left: 0; width: 34px; height: 4px; background: var(--accent); }
.feature h2 { font-size: clamp(25px, 2.9vw, 41px); font-weight: 800; line-height: 1.35; letter-spacing: -.045em; }
.feature-description { margin-top: 14px; color: var(--muted); font-size: clamp(13px, 1.15vw, 16px); line-height: 1.8; }
.feature-description span { display: inline-block; }
.button--primary { margin-top: 24px; background: var(--accent); padding-inline: 26px; }
.button--primary:hover { background: #fb168f; }

/* サービス一覧は黒背景の4列。右上の矢印やURL表記は設けない。 */
.services { padding-top: 36px; padding-bottom: 30px; scroll-margin-top: 20px; }
.section-heading { margin-bottom: 24px; text-align: center; }
.section-heading h2 { font-size: clamp(28px, 2.8vw, 40px); font-weight: 800; line-height: 1.4; letter-spacing: -.025em; }
.service-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.service-card { display: flex; flex-direction: column; gap: 12px; min-width: 0; padding: 14px; border: 1px solid var(--border); background: var(--panel); transition: border-color .18s, background-color .18s; }
.service-card:hover { border-color: #d95194; background: #10171d; }
.service-card:focus-visible { outline-offset: 3px; }
.card-identity { display: flex; flex-direction: column; justify-content: space-between; height: 82px; flex-shrink: 0; }
.card-identity--center { justify-content: center; align-items: center; }
.wordmark { display: flex; align-items: center; justify-content: center; gap: 10px; width: 100%; margin: 0; font-weight: 700; line-height: 1.3; white-space: nowrap; }
.wordmark img { flex-shrink: 0; object-fit: contain; }
.wordmark--tonarico { justify-content: center; gap: 12px; font-size: clamp(24px, 2.35vw, 34px); letter-spacing: .04em; }
.wordmark--tonarico img { width: 40px; height: 44px; transform: scale(1.55); }
.sports-wordmark { width: 100%; height: 50px; object-fit: contain; }
.wordmark--paybridge { gap: 6px; color: #386cff; font-size: clamp(24px, 2.15vw, 30px); letter-spacing: -.03em; }
.wordmark--paybridge img { width: 52px; height: 52px; filter: url("#remove-white"); }
/* IDOL Recordのロゴ背景は白を保ち、四辺の2pxだけを黒背景へフェードさせる。 */
.wordmark--idol { position: relative; isolation: isolate; padding-inline: 12px; }
.wordmark--idol::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: -6px;
  bottom: -6px;
  left: 50%;
  width: min(100%, 200px);
  transform: translateX(-50%);
  border-radius: 3px;
  background: linear-gradient(90deg, #fff0, #fff 2px, #fff calc(100% - 2px), #fff0);
  -webkit-mask-image: linear-gradient(180deg, transparent, #000 2px, #000 calc(100% - 2px), transparent);
  mask-image: linear-gradient(180deg, transparent, #000 2px, #000 calc(100% - 2px), transparent);
  pointer-events: none;
}
.idol-wordmark { width: 100%; height: 51px; object-fit: contain; }
.wordmark--recovery { gap: 7px; color: #21afaa; font-size: clamp(13px, 1.25vw, 18px); font-weight: 700; letter-spacing: -.04em; }
.wordmark--recovery img { width: 32px; height: 32px; }
/* Adsは通常の半角スペースで区切り、字間や要素間の余白を追加しない。 */
.wordmark--ads { display: block; text-align: center; font-size: 35px; letter-spacing: normal; }
.wordmark--typworld { width: auto; padding: 4px 9px; border: 1px solid #9298a6; font-family: YuGothic, "Yu Gothic", "Hiragino Kaku Gothic Pro", Meiryo, sans-serif; font-size: 28px; }
.wordmark--playg { gap: 13px; font-size: 29px; }
.wordmark--playg img { width: 49px; height: 49px; border-radius: 11px; }
.service-image { width: 100%; height: auto; aspect-ratio: 2.1; object-fit: cover; flex-shrink: 0; }
.service-image--recovery { object-position: center 34%; }
/* IDOL Recordはロゴを見出しにし、公式アプリアイコンをサムネイルにする。 */
.service-image--idol { position: relative; overflow: hidden; }
.service-image--idol img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; }
.card-description { min-height: 4.8em; color: #e7e9ec; font-size: 14px; line-height: 1.65; overflow-wrap: anywhere; }
.card-description span { display: inline-block; max-width: 100%; }

/* 会社概要は黒背景を保ち、見出しと既存の企業情報を左右に配置する。 */
.company-info { display: grid; grid-template-columns: minmax(180px, .6fr) minmax(0, 1.4fr); gap: 48px; padding-block: 40px 56px; border-top: 1px solid var(--border); }
.company-info .section-heading { margin-bottom: 0; text-align: left; }
.company-details { min-width: 0; margin: 0; font-size: 15px; line-height: 1.8; }
.company-details > div { display: grid; grid-template-columns: 120px minmax(0, 1fr); gap: 24px; padding-block: 16px; border-bottom: 1px solid var(--border); }
.company-details > div:first-child { padding-top: 4px; }
.company-details dt { color: var(--muted); font-weight: 500; }
.company-details dd { margin: 0; overflow-wrap: anywhere; }
.company-details a { text-decoration: underline; text-underline-offset: 4px; }
.company-details a:hover { color: #f47ab8; }

/* カンプの幾何学模様を、画像ではなくCSSの背景として表現する。 */
.contact { position: relative; isolation: isolate; overflow: hidden; background: #090b0f; border-block: 1px solid #22282e; }
.contact::before { content: ""; position: absolute; inset: 0; z-index: -1; background: repeating-linear-gradient(125deg, transparent 0 170px, #bc176222 171px, transparent 173px 320px), linear-gradient(150deg, #66123835, transparent 35%, #14151b 65%, #590a2738); }
.contact::after { content: ""; position: absolute; inset: 0; z-index: -1; background: #7d1a4930; clip-path: polygon(0 40%, 13% 0, 21% 100%, 44% 0, 65% 100%, 74% 0, 84% 100%, 100% 18%, 100% 0, 0 0); }
.contact-inner { display: flex; justify-content: space-between; align-items: center; gap: 28px; padding-block: 28px; }
.contact h2 { font-size: clamp(24px, 2.4vw, 34px); line-height: 1.4; font-weight: 800; letter-spacing: -.02em; }
.contact p { margin-top: 8px; font-size: 14px; color: var(--muted); line-height: 1.8; }
.button--contact { min-width: 228px; border-color: var(--accent); background: #080a0cb3; }
.button--contact:hover { background: #45122b; }

/* フッターは横並びを基本に、狭い画面では折り返す。 */
.site-footer { background: #050a0e; }
.footer-inner { display: flex; align-items: center; gap: 30px; min-height: 86px; padding-block: 16px; font-size: 11px; }
.footer-company { display: flex; align-items: center; gap: 24px; margin-right: auto; }
.brand--footer { gap: 9px; }
.brand--footer img { width: 35px; height: 35px; }
.brand--footer span { font-size: 25px; letter-spacing: .03em; }
.footer-nav { display: flex; gap: 18px; white-space: nowrap; }
.footer-nav a + a { padding-left: 18px; border-left: 1px solid #787d82; }
.footer-nav a:hover { text-decoration: underline; text-underline-offset: 4px; }
.site-footer small { font-size: 11px; white-space: nowrap; }

/* カンプと同程度の画面幅では、要素の密度を揃える。 */
@media (max-width: 1199px) {
  :root { --gutter: 22px; }
  .site-header { min-height: 80px; }
  .brand img { width: 42px; height: 42px; }
  .brand span { font-size: 32px; }
  .desktop-nav { gap: 23px; font-size: 12px; }
  .hero { padding-top: 20px; padding-bottom: 24px; }
  .hero h1 { font-size: clamp(44px, 5.7vw, 65px); }
  .feature { min-height: 255px; }
  .feature-copy { padding: 28px 22px; }
  .feature-name { font-size: 19px; margin-bottom: 14px; padding-bottom: 13px; }
  .feature h2 { font-size: clamp(25px, 3vw, 34px); }
  .feature-description { margin-top: 10px; font-size: 13px; }
  .button--primary { min-height: 46px; margin-top: 20px; font-size: 14px; }
  .services { padding-top: 24px; padding-bottom: 20px; }
  .section-heading { margin-bottom: 18px; }
  .section-heading h2 { font-size: 32px; }
  .service-grid { gap: 12px; }
  .service-card { gap: 10px; padding: 12px; }
  .card-identity { height: 73px; }
  .wordmark--tonarico { font-size: 28px; gap: 8px; }
  .wordmark--tonarico img { width: 34px; height: 40px; }
  .wordmark--paybridge { font-size: 26px; gap: 3px; }
  .wordmark--paybridge img { width: 42px; height: 46px; }
  .wordmark--recovery { font-size: 14px; gap: 4px; }
  .wordmark--recovery img { width: 26px; height: 30px; }
  .wordmark--ads { font-size: 31px; }
  .wordmark--playg { font-size: 24px; gap: 10px; }
  .wordmark--playg img { width: 40px; height: 40px; }
  .card-description { font-size: 12px; min-height: 4.95em; }
  .footer-inner { gap: 20px; }
  .footer-company { gap: 16px; }
}

/* タブレットでは2列にし、ブランド表記の十分な幅を確保する。 */
@media (max-width: 959px) {
  .desktop-nav { gap: 16px; }
  .brand span { font-size: 27px; }
  .brand img { width: 37px; height: 37px; }
  .button--header { padding-inline: 13px; gap: 10px; }
  .feature { min-height: 275px; }
  .feature-copy { padding: 26px 18px; }
  .feature h2 { font-size: 26px; }
  .service-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
  .card-identity { height: 80px; }
  .card-description { font-size: 14px; min-height: 3.3em; }
  .wordmark--tonarico { font-size: 32px; }
  .wordmark--paybridge { font-size: 30px; }
  .wordmark--recovery { font-size: 18px; }
  .wordmark--ads { font-size: 35px; }
  .wordmark--playg { font-size: 29px; }
  .footer-inner { flex-wrap: wrap; gap: 16px 24px; }
  .footer-company { width: 100%; }
  .site-footer small { margin-left: auto; }
}

/* スマートフォンでは写真と説明を縦にし、カードは2列のまま読みやすくする。 */
@media (max-width: 759px) {
  :root { --gutter: 20px; }
  .site-header { min-height: 76px; }
  .brand img { width: 35px; height: 35px; }
  .brand span { font-size: 28px; }
  .desktop-nav { display: none; }
  .menu-toggle { display: inline-flex; }
  .masthead::before { background-size: cover, cover, auto 260%; background-position: center, center, 68% 10%; }
  .hero { padding-top: 36px; padding-bottom: 36px; }
  .hero h1 { font-size: clamp(39px, 8.5vw, 59px); line-height: 1.25; }
  .featured-services { gap: 20px; }
  .feature { grid-template-columns: 1fr; }
  .feature-visual { aspect-ratio: 1.95; }
  .feature-visual::after { background: linear-gradient(0deg, #060d13, transparent 24%); }
  .feature-copy { padding: 16px 22px 26px; }
  .feature h2 { font-size: clamp(23px, 4.8vw, 32px); }
  .feature-name { font-size: 18px; }
  .feature-description { font-size: 13px; }
  .button--primary { min-height: 48px; margin-top: 20px; }
  .services { padding-top: 38px; padding-bottom: 28px; }
  .section-heading { margin-bottom: 22px; }
  .section-heading h2 { font-size: 28px; }
  .service-grid { gap: 12px; }
  .service-card { padding: 10px; gap: 10px; }
  .card-identity { height: 73px; }
  .wordmark--tonarico { gap: 5px; font-size: clamp(19px, 4.1vw, 29px); }
  .wordmark--tonarico img { width: 26px; height: 34px; }
  .wordmark--paybridge { gap: 2px; font-size: clamp(18px, 3.8vw, 28px); }
  .wordmark--paybridge img { width: 29px; height: 37px; }
  .wordmark--recovery { flex-direction: column; gap: 3px; font-size: clamp(10px, 2.2vw, 15px); letter-spacing: -.06em; }
  .wordmark--recovery img { width: 24px; height: 24px; }
  .wordmark--ads { font-size: clamp(23px, 4.8vw, 34px); }
  .wordmark--playg { gap: 7px; font-size: clamp(19px, 3.8vw, 28px); }
  .wordmark--playg img { width: 32px; height: 32px; border-radius: 8px; }
  .idol-wordmark { height: 44px; }
  .wordmark--typworld { padding: 4px 7px; font-size: clamp(19px, 3.8vw, 28px); }
  .sports-wordmark { height: 40px; }
  .service-image { aspect-ratio: 1.7; }
  .card-description { font-size: 12px; line-height: 1.75; min-height: 5.25em; }
  .company-info { grid-template-columns: 1fr; gap: 24px; padding-block: 36px 40px; }
  .company-details { font-size: 13px; }
  .company-details > div { grid-template-columns: 84px minmax(0, 1fr); gap: 16px; padding-block: 14px; }
  .contact-inner { flex-direction: column; align-items: flex-start; gap: 20px; padding-block: 28px; }
  .contact h2 { font-size: 25px; }
  .contact p { font-size: 13px; }
  .button--contact { min-width: 200px; min-height: 48px; font-size: 14px; }
  .footer-inner { align-items: flex-start; padding-block: 24px; font-size: 10px; }
  .footer-company { flex-direction: column; align-items: flex-start; gap: 12px; }
  .footer-nav { gap: 12px; }
  .footer-nav a + a { padding-left: 12px; }
  .site-footer small { width: 100%; margin: 0; font-size: 10px; }
}

/* 小さい端末ではカードを1列にし、ロゴの縮小を避ける。 */
@media (max-width: 359px) {
  :root { --gutter: 16px; }
  .hero h1 { font-size: 35px; }
  .brand { gap: 8px; }
  .menu-toggle { gap: 8px; }
  .service-grid { grid-template-columns: 1fr; }
  .wordmark--tonarico { font-size: 28px; }
  .wordmark--paybridge { font-size: 28px; }
  .wordmark--recovery { flex-direction: row; font-size: 16px; }
  .wordmark--ads { font-size: 32px; }
  .wordmark--playg { font-size: 28px; }
  .card-description { min-height: 3.5em; }
  .service-image { aspect-ratio: 2.1; }
}

/* 動きを減らす設定を尊重する。 */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  a { transition: none; }
}