/* --- グループ分けツール固有スタイル --- */

/* 分け方設定の背景色 */
.setting-box {
    background-color: var(--bs-primary-bg-subtle);
}

/* --- 結果表示エリア --- */
.result-group .card-header {
    background-color: var(--bs-tertiary-bg, var(--bs-primary-bg-subtle));
    /* フォールバックを追加 */
}

.member-item {
    cursor: grab;
    transition: background-color 0.2s;
    border-radius: .25rem;
}

.member-item:hover {
    background-color: rgba(var(--bs-primary-rgb), 0.1);
}

.member-item.dragging {
    opacity: 0.5;
}

.group-card-body.drag-over {
    background-color: rgba(var(--bs-primary-rgb), 0.2);
    outline: 2px dashed var(--bs-primary);
    outline-offset: -2px;
}

/* 結果カードのアニメーション */
.result-group.animate-in {
    animation: slideIn 0.5s ease-out forwards;
    opacity: 0;
    transform: translateY(20px);
}

@keyframes slideIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --- ローディングオーバーレイ & アニメーション --- */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.85);
    color: white;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 1060;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.5s ease;
}

.loading-overlay.show {
    opacity: 1;
    pointer-events: auto;
}

#shuffle-members-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    pointer-events: none;
}

.loading-text {
    font-size: 2rem;
    font-weight: bold;
}

.countdown-container {
    position: relative;
    width: 200px;
    height: 200px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.countdown-text {
    font-size: 6rem;
    font-weight: bold;
    animation: pulse 1s infinite;
    position: relative;
}

.countdown-text::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 150px;
    height: 150px;
    border: 6px solid transparent;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    animation: spin-reverse 1s linear infinite;
    border-top-color: var(--bs-primary);
    border-right-color: var(--bs-primary);
}

@keyframes spin-reverse {
    from {
        transform: translate(-50%, -50%) rotate(0deg);
    }

    to {
        transform: translate(-50%, -50%) rotate(-360deg);
    }
}

@keyframes pulse {
    50% {
        transform: scale(1.1);
    }
}

.shuffle-member {
    position: fixed;
    animation: shuffle 3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
    font-size: 1.5rem;
    font-weight: bold;
    color: #ffffff;
    text-shadow: 0 0 5px #000000;
    filter: blur(5px);
}

@keyframes shuffle {
    0% {
        opacity: 0;
        top: var(--start-y);
        left: var(--start-x);
        transform: translate(-50%, -50%) scale(0.5);
        filter: blur(10px);
    }

    10% {
        opacity: 1;
        top: var(--rand-y);
        left: var(--rand-x);
        transform: translate(-50%, -50%) scale(1);
        filter: blur(2px);
    }

    90% {
        opacity: 1;
        top: var(--rand-y-end);
        left: var(--rand-x-end);
        transform: translate(-50%, -50%) scale(1);
        filter: blur(2px);
    }

    100% {
        opacity: 0;
        top: var(--end-y);
        left: var(--end-x);
        transform: translate(-50%, -50%) scale(0.5);
        filter: blur(10px);
    }
}