/* ---------- 9.1 タイトル画面 ---------- */
#title-overlay {
    z-index: 100;
    transition: opacity 0.5s ease;
    opacity: 1;
}

#menu-buttons-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    position: relative;
    z-index: 2;
}

/* 設定で選ばれているボタンを緑色にするための専用クラス */
.menu-btn.active-setting {
    color: #0f0 !important;
    text-shadow: 0 0 10px #0f0 !important;
}

/* ---------- portrait ---------- */
@media (orientation: portrait) {
    #title-shell {
        min-width: 92vw;
        padding: 16px 10px 10px;
        margin-bottom: 16px;
    }

    #menu-buttons-container {
        gap: 12px;
    }

    #menu-buttons-container .menu-btn {
        min-width: 78vw;
        padding: 12px 20px;
        font-size: clamp(13px, 3.2vw, 16px);
    }

    #menu-footer {
        margin-top: 18px;
        font-size: clamp(11px, 2.4vw, 13px);
        line-height: 1.7;
    }
}

/* ---------- landscape ---------- */
@media (orientation: landscape) {
    #title-shell {
        margin-bottom: 14px;
        padding: 8px 18px 8px;
        min-width: min(88vw, 760px);
    }

    #menu-buttons-container {
        gap: 8px;
    }

    #menu-buttons-container .menu-btn {
        min-width: min(42vw, 280px);
        padding: 8px 16px;
        font-size: clamp(12px, 1vw, 14px);
    }

    #menu-footer {
        margin-top: 12px;
        font-size: clamp(10px, 0.85vw, 12px);
        line-height: 1.5;
    }
}