/* 手札エリア */
#hand-area {
    min-height: 240px;
    padding: 1rem;
    background: rgba(26, 31, 53, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    flex-shrink: 0;
}

#hand-container {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

/* カード（ワイド型 16:10） */
.card {
    width: 200px;
    height: 125px;
    background: linear-gradient(135deg, rgba(26, 31, 53, 0.95), rgba(19, 24, 41, 0.95));
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 0.8rem;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

/* カード背景グリッドエフェクト */
.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        repeating-linear-gradient(0deg, transparent, transparent 4px, rgba(0, 255, 159, 0.05) 4px, rgba(0, 255, 159, 0.05) 8px),
        repeating-linear-gradient(90deg, transparent, transparent 4px, rgba(0, 217, 255, 0.05) 4px, rgba(0, 217, 255, 0.05) 8px);
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.card:hover::before {
    opacity: 1;
}

.card:hover {
    transform: translateY(-10px) scale(1.05);
    box-shadow: 0 10px 30px rgba(0, 255, 159, 0.4);
    border-color: var(--text-primary);
}

.card.insufficient-ram {
    opacity: 0.5;
    cursor: not-allowed;
}

.card.insufficient-ram:hover {
    transform: none;
    box-shadow: none;
}

/* カードタイプ別の色 */
.card.type-attack {
    border-color: var(--damage-color);
}

.card.type-attack:hover {
    box-shadow: 0 10px 30px rgba(255, 0, 110, 0.4);
    border-color: var(--damage-color);
}

.card.type-skill {
    border-color: var(--accent-cyan);
}

.card.type-skill:hover {
    box-shadow: 0 10px 30px rgba(0, 217, 255, 0.4);
    border-color: var(--accent-cyan);
}

.card.type-power {
    border-color: var(--accent-pink);
}

.card.type-power:hover {
    box-shadow: 0 10px 30px rgba(255, 0, 110, 0.4);
    border-color: var(--accent-pink);
}

/* カードヘッダー */
.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.5rem;
}

.card-name {
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-light);
    line-height: 1.2;
}

.card-cost {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 900;
    color: var(--text-primary);
    background: rgba(0, 255, 159, 0.2);
    border: 2px solid var(--text-primary);
    border-radius: 50%;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.card.type-attack .card-cost {
    color: var(--damage-color);
    background: rgba(255, 0, 110, 0.2);
    border-color: var(--damage-color);
}

.card.type-skill .card-cost {
    color: var(--accent-cyan);
    background: rgba(0, 217, 255, 0.2);
    border-color: var(--accent-cyan);
}

/* カード説明 */
.card-description {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.3;
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* カードフッター（タグ表示） */
.card-footer {
    display: flex;
    gap: 0.3rem;
    margin-top: 0.5rem;
}

.card-tag {
    font-size: 0.7rem;
    padding: 0.15rem 0.4rem;
    background: rgba(122, 138, 163, 0.3);
    border-radius: 3px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* カード報酬 */
#card-rewards {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin: 2rem 0;
    flex-wrap: wrap;
}

.reward-card {
    width: 200px;
    height: 125px;
    background: linear-gradient(135deg, rgba(26, 31, 53, 0.95), rgba(19, 24, 41, 0.95));
    border: 2px solid var(--text-primary);
    border-radius: 8px;
    padding: 0.8rem;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.reward-card:hover {
    transform: scale(1.1);
    box-shadow: 0 0 30px rgba(0, 255, 159, 0.6);
}

/* プレイアニメーション */
@keyframes cardPlay {
    0% {
        transform: scale(1);
        opacity: 1;
    }

    50% {
        transform: scale(1.2) rotate(5deg);
        opacity: 0.8;
    }

    100% {
        transform: scale(0.8) translateY(-100px);
        opacity: 0;
    }
}

.card.playing {
    animation: cardPlay 0.5s ease-out forwards;
}
/* Upgraded Card Styling */
.card.upgraded {
    border-color: var(--accent-yellow) !important;
    box-shadow: 0 0 15px rgba(255, 190, 11, 0.5);
    position: relative;
}

.card.upgraded::after {
    content: "★";
    position: absolute;
    top: 5px;
    right: 5px;
    font-size: 1.2rem;
    color: var(--accent-yellow);
    text-shadow: 0 0 10px var(--accent-yellow);
    animation: pulse 2s infinite;
}