/* 卡牌区域 */
.cards-area-container {
    position: relative;
    flex: 1;
    max-height: 35vh;
    background: rgba(0, 0, 0, 0.4);
    border-radius: 15px;
    padding: 15px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.4);
    border: 1px solid #7209b7;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    /* ① 缩小最小列宽 */
    grid-auto-rows: 110px;
    /* ② 固定行高，消除行高差异 */
    grid-auto-flow: dense;
    /* ③ 启用紧凑填充模式 */
    gap: 8px;
    /* ④ 减小间隙 */
    align-items: start;
    /* ⑤ 取消网格项拉伸 */
    height: 100%;
    overflow-y: auto;
    padding: 10px;
    position: relative;
    z-index: 2;
}

/* 方形卡牌基本样式 */
.card {
    aspect-ratio: 1/1;
    /* 正方形 */
    background: linear-gradient(135deg, #7209b7, #560bad);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 12px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.4);
    cursor: grab;
    transition: transform 0.2s, box-shadow 0.2s;
    position: relative;
    user-select: none;
}

.card:hover {
    transform: translateY(-5px) rotate(2deg);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.5);
}



.card-name {
    font-size: 0.8rem;
    text-align: center;
    font-weight: bold;
    margin-top: 5px;
}

.card-value {
    font-size: 3rem;
    text-align: center;
    font-weight: bold;
    margin: auto;
}

.card i {
    font-size: 1.5rem;
    margin-bottom: 1px;
}

.card-icon {
    position: absolute;
    bottom: 4px;
    right: 4px;
    color: #eee;
    width: 24px;
    height: 24px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.2rem;
    font-weight: bold;
}

/* 不同功能的卡牌颜色 */
.card.attack {
    background: linear-gradient(135deg, #d00000, #9d0208);
    border: 2px solid #333;
}

.card.defense {
    background: linear-gradient(135deg, #5d5d5d, #2d2d2d);
    border: 2px solid #333;
}

.card.magic {
    background: linear-gradient(135deg, #4761e0, #163ea4);
    border: 2px solid #333;
}

.card.heal {
    background: linear-gradient(135deg, #2d6a4f, #1b4332);
    border: 2px solid #333;
}

.card.coin {
    background: linear-gradient(135deg, gold, goldenrod);
    border: 2px solid #333;
}

/* 特殊卡牌边框效果 */
.card.elite {
    border: 3px solid #ffea00;
    box-shadow: 0 0 15px rgba(255, 234, 0, 0.5);
}

.card.legendary::before {
    content: "";
    position: absolute;
    top: -4px;
    left: -4px;
    right: -4px;
    bottom: -4px;
    background: linear-gradient(45deg,
            #ff0000, #ff9a00, #d0de21,
            #4fdc4a, #3fdad8, #2fc9e2,
            #1c7fee, #5f15f1, #ba0cf8,
            #fb07d9, #ff0000);
    background-size: 200% 200%;
    z-index: -1;
    border-radius: 16px;
    animation: borderGlow 3s linear infinite;
}

.card.rare {
    border: 2px solid #00a8e8;
    box-shadow: 0 0 8px rgba(0, 168, 232, 0.6);
}

.card.selected {
    transform: translateY(-8px);
    box-shadow: 0 0 0 3px #eefd18, 0 15px 30px rgba(0, 204, 255, 0.4);
    z-index: 10;
}