/**
 * 戰鬥模式殼層關閉鈕 · 統一右上角 ✕
 * 用於盲盒／深淵／側邊模式／星神／巔峰
 */
.void-battle-close {
    position: absolute;
    top: max(10px, env(safe-area-inset-top, 0px));
    right: max(10px, env(safe-area-inset-right, 0px));
    z-index: 80;
    box-sizing: border-box;
    width: 2.75rem;
    height: 2.75rem;
    min-width: 44px;
    min-height: 44px;
    margin: 0;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255, 255, 255, 0.22);
    border-radius: 999px;
    background: rgba(8, 6, 18, 0.82);
    color: #fff8ec;
    font-size: 1.15rem;
    font-weight: 700;
    line-height: 1;
    text-decoration: none;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    box-shadow:
        0 4px 18px rgba(0, 0, 0, 0.45),
        inset 0 1px 0 rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: background 0.15s, border-color 0.15s, transform 0.12s, color 0.15s;
}

.void-battle-close:hover,
.void-battle-close:focus-visible {
    background: rgba(120, 40, 70, 0.88);
    border-color: rgba(251, 113, 133, 0.7);
    color: #fff;
    transform: scale(1.04);
    outline: none;
}

.void-battle-close:active {
    transform: scale(0.96);
}