/* ============================================================
   THREE.JS GAME GALLERY — AMIX
   ダークネオンアーケード。WebGL非対応環境でも完結する二層構造。
   html.gl-on  : 3D演出あり（サムネイルは3D筐体側に表示）
   html.no-gl  : HTMLのみで完結（サムネイルをカードに表示）
   ============================================================ */

:root {
  interpolate-size: allow-keywords; /* details のheight:autoトランジション用 */
  --bg: #05060e;
  --bg-panel: rgba(9, 11, 24, 0.82);
  --ink: #eef0ff;
  --ink-dim: #9aa0c0;
  --line: rgba(140, 150, 220, 0.18);
  --font-en: "Orbitron", "Noto Sans JP", sans-serif;
  --font-ja: "Noto Sans JP", sans-serif;
  --font-dot: "DotGothic16", "Noto Sans JP", sans-serif;
  --font-mono: "Space Mono", monospace;
  --font-brand: "Outfit", sans-serif; /* AMIXロゴはweb-motionと同じOutfit 800 */
  --c1: #64d7ff;
  --c2: #b48cff;
}

/* ゲームごとのアクセント（3D筐体のネオン色と同期。JSはこの変数を読む） */
[data-accent="shiba"] { --c1: #ffb340; --c2: #ff5e62; }
[data-accent="hato"]  { --c1: #6ec6ff; --c2: #b0f2ff; }
[data-accent="ebi"]   { --c1: #4dffb8; --c2: #38b6ff; }
[data-accent="sampo"] { --c1: #e07bff; --c2: #7b6cff; }

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-ja);
  font-weight: 400;
  line-height: 1.9;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

::selection { background: rgba(122, 140, 255, 0.4); }

/* ---------- 背景キャンバスとオーバーレイ ---------- */

#gl {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  z-index: 0;
}
html.no-gl #gl { display: none; }

.grain {
  position: fixed;
  inset: -50%;
  z-index: 2;
  pointer-events: none;
  opacity: 0.055;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
html.no-gl .grain { opacity: 0.035; }

/* HTMLのみモードの背景（グラデーション＋グリッド） */
html.no-gl body {
  background:
    radial-gradient(1100px 700px at 80% -10%, rgba(90, 70, 200, 0.22), transparent 60%),
    radial-gradient(900px 700px at 10% 110%, rgba(30, 120, 200, 0.16), transparent 60%),
    var(--bg);
}

/* ---------- ローダー ---------- */

.loader {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  transition: opacity 0.6s ease, visibility 0.6s;
}
.loader.done { opacity: 0; visibility: hidden; }
html.no-gl .loader { display: none; }

.loader-inner {
  text-align: center;
  /* フォント読み込み完了（.fonts-in）までは文字を見せず、差し替わりの瞬間を隠す */
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.loader.fonts-in .loader-inner {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  .loader-inner { transition: opacity 0.5s ease; transform: none; }
}
.loader-brand {
  /* web-motionのローダーと同仕様（Outfit 800 / letter-spacing 0） */
  font-family: var(--font-brand);
  font-weight: 800;
  font-size: clamp(28px, 5vw, 54px);
  line-height: 1;
  letter-spacing: 0;
  color: var(--ink);
}
.loader-title {
  font-family: var(--font-en);
  font-weight: 700;
  font-size: clamp(18px, 4vw, 28px);
  letter-spacing: 0.18em;
  margin-top: 10px;
  background: linear-gradient(90deg, #6ec6ff, #b48cff, #ff8bd4);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.loader-bar {
  width: min(280px, 60vw);
  height: 2px;
  margin: 26px auto 0;
  background: rgba(140, 150, 220, 0.18);
  border-radius: 2px;
  overflow: hidden;
}
.loader-bar i {
  display: block;
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #6ec6ff, #b48cff);
  transition: width 0.3s ease;
}
.loader-hint {
  font-family: var(--font-dot);
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--ink-dim);
  margin-top: 16px;
  animation: blink 1.1s steps(2, start) infinite;
}
@keyframes blink { to { visibility: hidden; } }
@media (prefers-reduced-motion: reduce) {
  .loader-hint { animation: none; }
}

/* コイン投入演出：読み込み完了→コインがスロットへ落ちる→開場 */
.loader-coin {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  margin: 20px auto 0;
  position: relative;
  opacity: 0;
  background: radial-gradient(circle at 35% 30%, #ffe9a0, #f0b429 60%, #b97e12);
  box-shadow: 0 0 18px rgba(255, 200, 80, 0.6), inset 0 0 0 3px rgba(140, 90, 0, 0.35);
}
.loader-coin::after {
  content: "★";
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: #8a5c00;
  font-size: 15px;
}
.loader.inserting .loader-coin {
  animation: coindrop 0.72s cubic-bezier(0.5, 0, 0.65, 0.4) forwards;
}
@keyframes coindrop {
  0% { opacity: 0; transform: translateY(-110px) rotateY(0deg); }
  18% { opacity: 1; }
  84% { transform: translateY(24px) rotateY(650deg) scale(1); opacity: 1; }
  100% { transform: translateY(30px) rotateY(720deg) scale(0.25); opacity: 0; }
}
.loader.inserting .loader-bar i {
  box-shadow: 0 0 22px rgba(255, 210, 110, 0.9);
  background: linear-gradient(90deg, #ffd86e, #ffb340);
}
.loader.inserting .loader-hint {
  animation-duration: 0.28s;
  color: #ffd86e;
}
@media (prefers-reduced-motion: reduce) {
  .loader.inserting .loader-coin { animation: none; }
}

/* ---------- スクロール進捗 ---------- */

.progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  z-index: 40;
  background: linear-gradient(90deg, var(--c1, #6ec6ff), #b48cff);
  transform-origin: 0 0;
  transform: scaleX(0);
  pointer-events: none;
}

/* ---------- ヘッダー ---------- */

.site-head {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px clamp(18px, 4vw, 44px);
  mix-blend-mode: normal;
}
.site-head-brand {
  /* web-motionのトップバーと同仕様（Space Mono 700 / letter-spacing 0） */
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0;
  text-decoration: none;
  color: var(--ink);
}
.site-head-right { display: flex; align-items: center; gap: 14px; }
.site-head-link {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink-dim);
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 100px;
  padding: 7px 14px;
  transition: color 0.25s, border-color 0.25s, box-shadow 0.25s;
}
.site-head-link:hover {
  color: var(--ink);
  border-color: rgba(110, 198, 255, 0.55);
  box-shadow: 0 0 16px rgba(110, 198, 255, 0.25);
}
.gl-toggle {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink-dim);
  background: none;
  border: 1px solid var(--line);
  border-radius: 100px;
  padding: 7px 14px;
  cursor: pointer;
  transition: color 0.25s, border-color 0.25s;
}
.gl-toggle span { color: #4dffb8; }
.gl-toggle[aria-pressed="false"] span { color: #ff5e62; }
.gl-toggle:hover { color: var(--ink); border-color: rgba(140, 150, 220, 0.5); }

/* ---------- レイアウト共通 ---------- */

.content { position: relative; z-index: 10; }

/* 3Dオン時はDOMをポインター透過にして、キャンバス上の筐体を
   直接ホバー・クリックできるようにする（パネル類だけ受け付ける） */
html.gl-on .content { pointer-events: none; }
html.gl-on .content .game-card,
html.gl-on .content .game-thumb,
html.gl-on .content .about-inner,
html.gl-on .content .faq details,
html.gl-on .content .site-foot,
html.gl-on .content .hero-lead,
html.gl-on .content .hero-title { pointer-events: auto; }

.section {
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 12vh clamp(18px, 6vw, 90px);
}

/* ---------- ヒーロー ---------- */

.hero { align-items: flex-start; }

/* 登場演出：ローダー明け（gl-on）に時間差でフェードアップ */
html.gl-on .hero-eyebrow,
html.gl-on .hero-title,
html.gl-on .hero-lead,
html.gl-on .hero-scroll {
  opacity: 0;
  transform: translateY(26px);
  animation: rise 1.1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
html.gl-on .hero-eyebrow { animation-delay: 1.1s; }
html.gl-on .hero-title { animation-delay: 1.3s; }
html.gl-on .hero-lead { animation-delay: 1.7s; }
html.gl-on .hero-scroll { animation-delay: 2.2s; }
@keyframes rise {
  to { opacity: 1; transform: translateY(0); }
}
@media (prefers-reduced-motion: reduce) {
  html.gl-on .hero-eyebrow,
  html.gl-on .hero-title,
  html.gl-on .hero-lead,
  html.gl-on .hero-scroll {
    animation: none;
    opacity: 1;
    transform: none;
  }
}

/* テキストの可読性を上げる暗幕（3D側が透ける左サイド） */
.hero { position: relative; }
html.gl-on .hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: radial-gradient(90vh 80vh at 24% 50%, rgba(3, 4, 10, 0.6), transparent 70%);
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: clamp(10px, 1.4vw, 12px);
  letter-spacing: 0.3em;
  color: var(--ink-dim);
  margin-bottom: 2.2em;
}
.hero-title { line-height: 1.04; }
.hero-title-en {
  display: block;
  font-family: var(--font-en);
  font-weight: 900;
  font-size: clamp(44px, 10.5vw, 128px);
  letter-spacing: 0.02em;
  background: linear-gradient(115deg, #eaf6ff 20%, #6ec6ff 48%, #b48cff 72%, #ff8bd4 96%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 0 26px rgba(110, 160, 255, 0.35));
}
.hero-title-ja {
  display: block;
  font-family: var(--font-dot);
  font-size: clamp(14px, 2.4vw, 20px);
  letter-spacing: 0.3em;
  color: var(--ink-dim);
  margin-top: 2em;
}
.hero-lead {
  max-width: 34em;
  margin-top: 2.6em;
  font-size: clamp(13px, 1.7vw, 15px);
  color: #c9cde8;
}
.hero-scroll {
  margin-top: 7vh;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.4em;
  color: var(--ink-dim);
  display: flex;
  align-items: center;
  gap: 14px;
}
.hero-scroll span {
  display: block;
  width: 1px;
  height: 44px;
  background: linear-gradient(180deg, transparent, #6ec6ff);
  animation: drip 1.8s ease-in-out infinite;
}
@keyframes drip {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}
@media (prefers-reduced-motion: reduce) {
  .hero-scroll span { animation: none; }
}

/* ---------- ゲームセクション ---------- */

.game { align-items: flex-start; gap: 34px; }
.game:nth-of-type(even) { align-items: flex-end; }

.game-card {
  max-width: 560px;
  background: var(--bg-panel);
  border: 1px solid color-mix(in srgb, var(--c1) 32%, transparent);
  border-radius: 22px;
  padding: clamp(26px, 4vw, 44px);
  box-shadow:
    0 30px 70px rgba(0, 0, 0, 0.55),
    0 0 0 1px rgba(255, 255, 255, 0.02) inset,
    0 0 44px color-mix(in srgb, var(--c1) 9%, transparent);
}

.game-no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.28em;
  color: var(--c1);
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}
.game-genre {
  font-family: var(--font-dot);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--ink-dim);
  border: 1px solid var(--line);
  border-radius: 100px;
  padding: 3px 12px;
}

.game-title {
  font-family: var(--font-en);
  font-weight: 800;
  font-size: clamp(30px, 5.4vw, 52px);
  letter-spacing: 0.02em;
  line-height: 1.1;
  margin-top: 0.55em;
  color: #fff;
  text-shadow: 0 0 30px color-mix(in srgb, var(--c1) 55%, transparent);
}
.game-title-sub {
  display: block;
  font-family: var(--font-ja);
  font-weight: 700;
  font-size: clamp(12px, 1.8vw, 14px);
  letter-spacing: 0.14em;
  color: var(--ink-dim);
  margin-top: 0.9em;
}

.game-desc {
  margin-top: 1.6em;
  font-size: clamp(13px, 1.6vw, 14.5px);
  color: #c9cde8;
}

.game-tech {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 6px 18px;
  margin-top: 1.8em;
  border-top: 1px solid var(--line);
  padding-top: 1.4em;
}
.game-tech dt {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--ink-dim);
  padding-top: 4px;
}
.game-tech dd {
  font-size: 12.5px;
  color: #b9bede;
}

.game-play {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-top: 2.2em;
  font-family: var(--font-ja);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.2em;
  text-decoration: none;
  color: #05060e;
  background: linear-gradient(90deg, var(--c1), var(--c2));
  border-radius: 100px;
  padding: 14px 34px;
  box-shadow: 0 0 26px color-mix(in srgb, var(--c1) 45%, transparent);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.game-play:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 6px 40px color-mix(in srgb, var(--c1) 65%, transparent);
}
.game-play span { transition: transform 0.25s ease; }
.game-play:hover span { transform: translateX(4px); }

/* サムネイル：3DオンではDOM側を隠す（筐体スクリーンに表示されるため） */
.game-thumb {
  display: block;
  max-width: 560px;
  width: 100%;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--c1) 30%, transparent);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5), 0 0 34px color-mix(in srgb, var(--c1) 12%, transparent);
  transition: transform 0.35s ease, box-shadow 0.35s ease;
}
.game-thumb img { display: block; width: 100%; height: auto; }
.game-thumb:hover {
  transform: translateY(-4px) rotate(-0.4deg);
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.6), 0 0 50px color-mix(in srgb, var(--c1) 22%, transparent);
}
html.gl-on .game-thumb { display: none; }

/* ---------- ABOUT ---------- */

.about { align-items: center; }
.about-inner {
  max-width: 720px;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: clamp(28px, 5vw, 56px);
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.5);
}
.about-title {
  font-family: var(--font-ja);
  font-weight: 900;
  font-size: clamp(22px, 3.6vw, 30px);
  letter-spacing: 0.08em;
  margin-bottom: 1.2em;
  background: linear-gradient(90deg, #eaf6ff, #6ec6ff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.about-inner p {
  font-size: clamp(13px, 1.6vw, 14.5px);
  color: #c9cde8;
}
.about-inner p + p { margin-top: 1.4em; }
.about-inner a { color: #6ec6ff; text-underline-offset: 4px; }
.about-facts {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px 22px;
  margin-top: 2em;
  border-top: 1px solid var(--line);
  padding-top: 1.6em;
}
.about-facts dt {
  font-family: var(--font-dot);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ink-dim);
  padding-top: 2px;
}
.about-facts dd { font-size: 13px; color: #b9bede; }

/* ---------- FAQ ---------- */

.faq { align-items: center; }
.faq-title {
  font-family: var(--font-ja);
  font-weight: 900;
  font-size: clamp(20px, 3.2vw, 26px);
  letter-spacing: 0.12em;
  margin-bottom: 1.6em;
}
.faq details {
  width: min(720px, 100%);
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  margin-bottom: 12px;
  overflow: hidden;
}
.faq summary {
  cursor: pointer;
  list-style: none;
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.04em;
  padding: 18px 22px;
  position: relative;
  transition: color 0.2s;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 22px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  color: #6ec6ff;
}
.faq details[open] summary::after { content: "−"; }
.faq summary:hover { color: #6ec6ff; }
.faq details p {
  padding: 0 22px 20px;
  font-size: 13.5px;
  color: #c9cde8;
}
/* スムーズなアコーディオン展開（対応ブラウザのみ。非対応は即時開閉） */
.faq details::details-content {
  block-size: 0;
  overflow: hidden;
  transition: block-size 0.35s ease, content-visibility 0.35s allow-discrete;
}
.faq details[open]::details-content { block-size: auto; }
@media (prefers-reduced-motion: reduce) {
  .faq details::details-content { transition: none; }
}
.faq details a { color: #6ec6ff; text-underline-offset: 4px; }

/* ---------- フッター ---------- */

.site-foot {
  min-height: 72vh;
  align-items: center;
  justify-content: center;
  text-align: center;
}
.site-foot-logo {
  /* web-motionのフッターロゴと同仕様（Outfit 800 / uppercase / letter-spacing 0） */
  font-family: var(--font-brand);
  font-weight: 800;
  text-transform: uppercase;
  font-size: clamp(40px, 8vw, 120px);
  line-height: 0.9;
  letter-spacing: 0;
  text-shadow: 0 0 34px rgba(110, 198, 255, 0.35);
}
.site-foot-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 26px;
  margin-top: 2.4em;
}
.site-foot-nav a {
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--ink-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}
.site-foot-nav a:hover { color: var(--ink); border-color: #6ec6ff; }
.site-foot-note {
  margin-top: 3em;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  line-height: 2.2;
  color: var(--ink-dim);
}
.site-foot-note a {
  color: #9fb6ff;
  text-decoration: none;
  border-bottom: 1px solid rgba(159, 182, 255, 0.35);
  transition: color 0.2s, border-color 0.2s;
}
.site-foot-note a:hover { color: var(--ink); border-color: #6ec6ff; }
/* 等幅フォントの全幅スペースを詰める（Haruki Tominaga の間） */
.name-sp { display: inline-block; width: 0.38em; }

/* ---------- フォーカス ---------- */

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid #6ec6ff;
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- レスポンシブ ---------- */

@media (max-width: 760px) {
  .section { padding: 14vh 20px; }
  .game, .game:nth-of-type(even) { align-items: stretch; }
  .game-card { max-width: none; }
  .site-head { padding: 14px 18px; }
  .site-head-link { display: none; }
  /* モバイル3Dオン時：筐体が見えるようカードを下へ寄せる */
  html.gl-on .game { justify-content: flex-end; padding-bottom: 8vh; }
}