/* system-v1.css — 設定 / クレジット / 終了確認 / 版表示 (v1 / 2026-09-08 Steam向け) */
.title-system { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin-top: 12px; }
.title-system .btn { min-width: 140px; }
.title-version { position: absolute; right: 14px; bottom: 10px; color: var(--title-muted, #8ba1bc); font-size: 11px; letter-spacing: 1px; opacity: .85; pointer-events: none; }
#screen-title { position: relative; }

.system-box {
  display: flex; flex-direction: column;
  width: min(100%, 980px); height: 100%; min-height: 0; margin: 0 auto;
  border: 1px solid var(--cast-line, rgba(214, 178, 94, .35)); border-radius: 16px;
  background: linear-gradient(160deg, var(--cast-ink-glass, rgba(18, 26, 38, .92)), var(--cast-ink-deep, #0b1119));
  box-shadow: 0 24px 70px var(--cast-shadow, rgba(0, 0, 0, .6)), inset 0 1px rgba(255, 239, 191, .12);
  overflow: hidden;
}
.system-head { flex: none; padding: 10px 16px 8px; border-bottom: 1px solid var(--cast-line-dim, rgba(214, 178, 94, .18)); text-align: center; }
.system-head h2 {
  margin: 0; font: 700 20px/1.2 var(--cast-font-display, serif); letter-spacing: 6px; text-indent: 6px;
  background: linear-gradient(180deg, var(--cast-gold-hi, #ffe9a8), #d4af37);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.system-body { flex: 1; min-height: 0; overflow-y: auto; padding: 12px 18px; }
.system-foot { flex: none; padding: 8px 16px 12px; border-top: 1px solid var(--cast-line-dim, rgba(214, 178, 94, .18)); }
.system-foot .btn { width: 100%; }

/* 設定 */
.settings-group { margin: 0 0 14px; padding: 10px 12px; border: 1px solid rgba(214, 178, 94, .16); border-radius: 12px; background: rgba(255, 255, 255, .02); }
.settings-group h3 { margin: 0 0 6px; color: var(--cast-gold, #d4af37); font-size: 13px; letter-spacing: 3px; }
.settings-group .pause-setting-row, .settings-group .pause-volume-row { margin: 6px 0; }
.settings-keys { display: grid; grid-template-columns: auto 1fr; gap: 4px 14px; margin: 6px 0 0; font-size: 12px; color: #c9d4e2; }
.settings-keys dt { color: #ffe9a8; white-space: nowrap; }
.settings-keys dd { margin: 0; }
.settings-gamepad-status { display: inline-block; margin: 4px 0 8px; padding: 3px 10px; border-radius: 999px; border: 1px solid rgba(214, 178, 94, .3); font-size: 12px; color: #c9d4e2; }

/* クレジット */
.credits-title { display: flex; align-items: baseline; justify-content: center; gap: 12px; margin: 6px 0 16px; }
.credits-title strong { font: 700 26px/1.1 var(--cast-font-display, serif); letter-spacing: 8px; color: #ffe9a8; }
.credits-title small { color: #8ba1bc; letter-spacing: 1px; }
.credits-section { margin: 0 auto 16px; max-width: 720px; text-align: center; }
.credits-section h3 { margin: 0 0 6px; color: var(--cast-gold, #d4af37); font-size: 13px; letter-spacing: 4px; }
.credits-note { margin: 0 0 8px; color: #8ba1bc; font-size: 12px; line-height: 1.6; }
.credits-list { margin: 0; }
.credits-list dt { color: #8ba1bc; font-size: 12px; letter-spacing: 1px; }
.credits-list dt:empty { display: none; }
.credits-list dd { margin: 0 0 8px; color: #f0e6cf; font-size: 15px; line-height: 1.6; }
.credits-legal p { margin: 4px 0; color: #7f8fa4; font-size: 11px; line-height: 1.6; }

/* 終了確認 */
#quit-dialog { border: 1px solid rgba(214, 178, 94, .4); border-radius: 14px; padding: 0; background: #0f161f; color: #f0e6cf; max-width: 420px; }
#quit-dialog::backdrop { background: rgba(0, 0, 0, .65); }
.quit-body { padding: 20px 22px 16px; text-align: center; }
.quit-body h2 { margin: 0 0 8px; font-size: 18px; letter-spacing: 4px; color: #ffe9a8; }
.quit-body p { margin: 0 0 14px; color: #c9d4e2; font-size: 13px; line-height: 1.6; }
.quit-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

@media (max-width: 640px) {
  .title-system .btn { min-width: 0; flex: 1 1 45%; }
  .credits-title strong { font-size: 22px; letter-spacing: 5px; }
}