/* ========================================================
   CHAOS CALL — サウンドON/OFFトグル §19対応

   全ページ共通で右下に固定表示。ローディング画面の電子音・
   ノイズ音・トップページBGMの再生可否をここでユーザーが選択する。
   ======================================================== */

.cc-sound-toggle {
    position: fixed;
    right: 20px;
    bottom: 20px;
    z-index: 100000;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: rgba(6, 19, 22, 0.88);
    border: var(--cc-border-width) solid rgba(0, 229, 232, 0.35);
    border-radius: 999px;
    color: var(--cc-text-muted);
    font-family: var(--cc-font-ui);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 1.5px;
    cursor: pointer;
    -webkit-backdrop-filter: blur(6px);
    backdrop-filter: blur(6px);
    transition:
        color var(--cc-transition-fast),
        border-color var(--cc-transition-fast),
        box-shadow var(--cc-transition-fast);
}

.cc-sound-toggle:hover {
    color: var(--cc-white);
    border-color: rgba(0, 229, 232, 0.6);
}

.cc-sound-toggle__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.cc-sound-toggle__wave {
    opacity: 0;
    transition: opacity var(--cc-transition-fast);
}

.cc-sound-toggle__mute {
    opacity: 1;
    transition: opacity var(--cc-transition-fast);
}

/* ---------- ON状態 ---------- */

.cc-sound-toggle.is-on {
    color: var(--cc-cyan);
    border-color: var(--cc-cyan);
    box-shadow: var(--cc-glow-cyan);
}

.cc-sound-toggle.is-on .cc-sound-toggle__wave {
    opacity: 1;
    animation: cc-sound-wave-pulse 1.6s ease-in-out infinite;
}

.cc-sound-toggle.is-on .cc-sound-toggle__mute {
    opacity: 0;
}

@keyframes cc-sound-wave-pulse {
    0%, 100% { opacity: 1; }
    50%      { opacity: 0.4; }
}

@media (max-width: 768px) {
    .cc-sound-toggle {
        right: 14px;
        bottom: 14px;
        padding: 9px 12px;
    }
    .cc-sound-toggle__label {
        display: none; /* モバイルはアイコンのみでコンパクトに */
    }
}