/* ============================================
   ロココGAMES 公式サイト 共通スタイル
   コンセプト:「ブランドは額縁、ゲームが絵画」
   墨藍 × 紙白 × 明朝
   ============================================ */

:root {
  --ink: #0B1626;        /* 墨藍:ブースの黒布 */
  --ink-soft: #16243A;   /* 墨藍の明るい段 */
  --paper: #FAF8F3;      /* 紙白 */
  --white: #FFFFFF;
  --indigo: #185FA5;     /* 藍:ORACLEの青 */
  --ice: #B5D4F4;        /* 氷青:暗所のアクセント */
  --ice-dim: #8FA3BC;    /* 暗所の本文 */
  --text: #1A2435;       /* 紙上の本文 */
  --muted: #847E72;      /* 紙上の補足 */
  --line: #D9D2C4;       /* 紙上の罫線 */
  --line-dark: #2A3B55;  /* 暗所の罫線 */
  --serif: "Zen Old Mincho", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --latin: "Cormorant Garamond", "Zen Old Mincho", serif;
  --sans: "Noto Sans JP", "Hiragino Kaku Gothic ProN", sans-serif;
}

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

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}

body {
  font-family: var(--sans);
  background: var(--paper);
  color: var(--text);
  font-size: 15px;
  line-height: 2;
  letter-spacing: 0.04em;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

.container { max-width: 1040px; margin: 0 auto; padding: 0 24px; }

/* ---------- ヘッダー ---------- */
.site-header {
  background: var(--ink);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--line-dark);
}
.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 64px;
}
.brand {
  font-family: var(--sans);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.3em;
  color: var(--paper);
}
.brand span { font-weight: 350; }
.nav { display: flex; align-items: center; gap: 28px; }
.nav a {
  font-size: 13px;
  color: var(--ice);
  letter-spacing: 0.12em;
  transition: color 0.2s;
}
.nav a:hover, .nav a:focus-visible { color: var(--paper); }
.nav .nav-store {
  border: 1px solid var(--ice);
  padding: 7px 20px;
  color: var(--paper);
  transition: background 0.2s, color 0.2s;
}
.nav .nav-store:hover, .nav .nav-store:focus-visible {
  background: var(--ice);
  color: var(--ink);
}
/* ハンバーガーボタン(スマホ幅のみ表示) */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--paper);
  transition: transform 0.25s, opacity 0.25s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ---------- 暗所セクション(ヒーロー等) ---------- */
.dark { background: var(--ink); color: var(--paper); }

.hero { text-align: center; padding: 96px 24px 88px; }
.hero-eyebrow {
  font-family: var(--serif);
  font-size: 13px;
  color: var(--ice);
  letter-spacing: 0.45em;
  margin-bottom: 28px;
}
.hero h1 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(26px, 4.6vw, 42px);
  line-height: 1.9;
  letter-spacing: 0.14em;
  margin-bottom: 26px;
}
.hero p {
  font-size: 14px;
  color: var(--ice-dim);
  line-height: 2.4;
  margin-bottom: 40px;
}
.hero-rule {
  width: 40px;
  height: 1px;
  background: var(--indigo);
  margin: 0 auto;
}

/* ---------- ボタン ---------- */
.btn {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.18em;
  padding: 13px 34px;
  transition: opacity 0.2s, background 0.2s, color 0.2s;
}
.btn-solid { background: var(--paper); color: var(--ink); }
.btn-solid:hover, .btn-solid:focus-visible { opacity: 0.85; }
.btn-outline { border: 1px solid var(--line-dark); color: var(--ice); }
.btn-outline:hover, .btn-outline:focus-visible { border-color: var(--ice); color: var(--paper); }
.btn-indigo { background: var(--indigo); color: var(--white); }
.btn-indigo:hover, .btn-indigo:focus-visible { opacity: 0.88; }
.btn-outline-light { border: 1px solid var(--line); color: var(--text); }
.btn-outline-light:hover, .btn-outline-light:focus-visible { border-color: var(--indigo); color: var(--indigo); }

/* ---------- 最新作フィーチャー(暗所の額縁) ---------- */
.feature { padding: 0 24px 100px; }
.feature-frame {
  max-width: 1040px;
  margin: 0 auto;
  border: 1px solid var(--line-dark);
  display: grid;
  grid-template-columns: 1.05fr 1fr;
}
.feature-art {
  background: #E6F1FB;
  min-height: 340px;
}
.feature-art img { width: 100%; height: 100%; object-fit: cover; }
.feature-body { padding: 48px 44px; display: flex; flex-direction: column; justify-content: center; }
.feature-label {
  font-size: 11px;
  color: var(--ice);
  letter-spacing: 0.3em;
  margin-bottom: 16px;
}
.feature-title {
  font-family: var(--latin);
  font-weight: 500;
  font-size: 40px;
  letter-spacing: 0.28em;
  color: var(--paper);
  margin-bottom: 4px;
}
.feature-title-ja {
  font-family: var(--serif);
  font-size: 13px;
  letter-spacing: 0.6em;
  color: var(--ice-dim);
  margin-bottom: 22px;
}
.catch {
  font-family: var(--serif);
  font-size: 15px;
  line-height: 2.2;
  letter-spacing: 0.1em;
  color: var(--ice);
  margin-bottom: 22px;
}
.feature-spec {
  font-size: 12.5px;
  color: var(--ice-dim);
  letter-spacing: 0.12em;
  margin-bottom: 30px;
}
.feature-actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* ---------- 紙上セクション共通 ---------- */
.section { padding: 92px 0; }
.section-head { text-align: center; margin-bottom: 56px; }
.section-title {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 24px;
  letter-spacing: 0.32em;
  margin-bottom: 10px;
}
.section-sub {
  font-family: var(--latin);
  font-size: 12px;
  letter-spacing: 0.4em;
  color: var(--muted);
}

/* ---------- 作品一覧 ---------- */
.works-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 28px;
}
.work-card {
  background: var(--white);
  border: 1px solid var(--line);
  transition: border-color 0.25s;
  display: block;
}
.work-card:hover, .work-card:focus-visible { border-color: var(--indigo); }
.work-thumb { aspect-ratio: 16 / 10; overflow: hidden; background: #E6F1FB; }
.work-thumb img { width: 100%; height: 100%; object-fit: cover; }
.work-body { padding: 22px 24px 26px; }
.work-name {
  font-family: var(--latin);
  font-size: 21px;
  font-weight: 500;
  letter-spacing: 0.22em;
  margin-bottom: 6px;
}
.work-name .ja {
  font-family: var(--serif);
  font-size: 11px;
  letter-spacing: 0.4em;
  color: var(--muted);
  margin-left: 10px;
}
.work-catch {
  font-family: var(--serif);
  font-size: 13px;
  line-height: 2;
  color: var(--text);
  margin-bottom: 12px;
}
.work-meta { font-size: 12px; color: var(--muted); letter-spacing: 0.08em; }
.work-status {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--indigo);
  border: 1px solid var(--indigo);
  padding: 3px 12px;
  margin-top: 14px;
}
.work-status.soon { color: var(--muted); border-color: var(--line); }

/* ---------- 約束(壱弐参) ---------- */
.promise { background: var(--white); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.promise-list { max-width: 640px; margin: 0 auto; }
.promise-item {
  display: flex;
  gap: 28px;
  padding: 26px 8px;
  border-top: 1px solid var(--line);
  align-items: baseline;
}
.promise-item:last-child { border-bottom: 1px solid var(--line); }
.promise-num {
  font-family: var(--serif);
  font-size: 15px;
  color: var(--indigo);
  min-width: 28px;
}
.promise-item h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 16px;
  letter-spacing: 0.1em;
  margin-bottom: 4px;
}
.promise-item p { font-size: 13px; color: var(--muted); line-height: 2; }

/* ---------- サークル紹介 ---------- */
.about-lead {
  max-width: 620px;
  margin: 0 auto;
  text-align: center;
  font-size: 14px;
  line-height: 2.6;
}
.about-lead .serif-line {
  font-family: var(--serif);
  font-size: 17px;
  letter-spacing: 0.14em;
  display: block;
  margin-bottom: 20px;
}

/* ---------- お問い合わせ ---------- */
.contact { text-align: center; }
.contact-mail {
  font-family: var(--latin);
  font-size: 22px;
  letter-spacing: 0.1em;
  color: var(--indigo);
  display: inline-block;
  margin: 18px 0 14px;
  border-bottom: 1px solid var(--indigo);
  padding-bottom: 4px;
}
.contact-note { font-size: 12.5px; color: var(--muted); line-height: 2.2; }

/* ---------- フッター ---------- */
.site-footer { background: var(--ink); padding: 36px 0; }
.site-footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-links { display: flex; gap: 24px; font-size: 12px; color: var(--ice-dim); }
.footer-links a:hover, .footer-links a:focus-visible { color: var(--paper); }
.copyright { font-size: 11.5px; color: #4A5D78; letter-spacing: 0.1em; }

/* ============================================
   作品詳細ページ(oracle.html)
   ============================================ */
.detail-hero { padding: 72px 24px 80px; text-align: center; }
.detail-hero .breadcrumb {
  font-size: 11.5px;
  color: var(--ice-dim);
  letter-spacing: 0.2em;
  margin-bottom: 40px;
}
.detail-hero .breadcrumb a:hover { color: var(--paper); }
.detail-title {
  font-family: var(--latin);
  font-weight: 500;
  font-size: clamp(44px, 8vw, 64px);
  letter-spacing: 0.3em;
  color: var(--paper);
  margin-bottom: 6px;
}
.detail-title-ja {
  font-family: var(--serif);
  font-size: 14px;
  letter-spacing: 0.8em;
  color: var(--ice-dim);
  margin-bottom: 30px;
}
.detail-catch {
  font-family: var(--serif);
  font-size: clamp(15px, 2.4vw, 19px);
  line-height: 2.2;
  letter-spacing: 0.12em;
  color: var(--ice);
}
.detail-keyart {
  max-width: 880px;
  margin: 52px auto 0;
  border: 1px solid var(--line-dark);
}
.detail-keyart img { width: 100%; }

.spec-bar { background: var(--ink-soft); border-top: 1px solid var(--line-dark); }
.spec-bar .container {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0;
}
.spec-item {
  padding: 22px 36px;
  text-align: center;
  border-left: 1px solid var(--line-dark);
}
.spec-item:first-child { border-left: none; }
.spec-item dt {
  font-size: 11px;
  letter-spacing: 0.25em;
  color: var(--ice-dim);
  margin-bottom: 4px;
}
.spec-item dd {
  font-family: var(--serif);
  font-size: 16px;
  letter-spacing: 0.1em;
  color: var(--paper);
}

.detail-intro { max-width: 640px; margin: 0 auto; text-align: center; }
.detail-intro p { margin-bottom: 1.6em; font-size: 14.5px; line-height: 2.5; }
.detail-intro strong { font-weight: 700; color: var(--indigo); }

.point-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 28px;
}
.point-card { background: var(--white); border: 1px solid var(--line); padding: 36px 30px; }
.point-num {
  font-family: var(--latin);
  font-size: 13px;
  letter-spacing: 0.3em;
  color: var(--indigo);
  margin-bottom: 14px;
}
.point-card h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 17px;
  letter-spacing: 0.08em;
  line-height: 1.8;
  margin-bottom: 12px;
}
.point-card p { font-size: 13px; color: var(--muted); line-height: 2.1; }

.contents-table { max-width: 560px; margin: 0 auto; width: 100%; border-collapse: collapse; }
.contents-table td { padding: 13px 8px; border-bottom: 1px solid var(--line); font-size: 13.5px; }
.contents-table td:last-child { text-align: right; color: var(--muted); }

.buy { background: var(--ink); text-align: center; padding: 88px 24px; }
.buy .section-title { color: var(--paper); }
.buy-price {
  font-family: var(--serif);
  font-size: 30px;
  letter-spacing: 0.1em;
  color: var(--paper);
  margin: 26px 0 8px;
}
.buy-price small { font-size: 14px; color: var(--ice-dim); }
.buy-note { font-size: 12.5px; color: var(--ice-dim); margin-bottom: 34px; line-height: 2.2; }

/* ---------- 内容物の写真 ---------- */
.components-photo {
  max-width: 460px;
  margin: 0 auto 40px;
  border: 1px solid var(--line);
}
.components-photo img { width: 100%; }

/* ---------- レスポンシブ ---------- */
@media (max-width: 860px) {
  .feature-frame { grid-template-columns: 1fr; }
  .feature-art { min-height: 240px; }
  .spec-item { padding: 16px 22px; }
}
@media (max-width: 720px) {
  .nav-toggle { display: flex; }
  .nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--ink);
    border-bottom: 1px solid var(--line-dark);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0 20px;
  }
  .nav.open { display: flex; }
  .nav a {
    padding: 14px 28px;
    font-size: 14px;
    border-top: 1px solid var(--line-dark);
  }
  .nav a:first-child { border-top: none; }
  .nav .nav-store {
    margin: 16px 28px 0;
    text-align: center;
    border: 1px solid var(--ice);
    padding: 12px 20px;
  }
  .hero { padding: 72px 20px 64px; }
  .section { padding: 64px 0; }
  .feature-body { padding: 36px 28px; }
  .promise-item { gap: 18px; }
  .spec-item { border-left: none; padding: 12px 18px; }
}

/* キーボードフォーカスの可視化 */
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--indigo);
  outline-offset: 3px;
}