/* =========================================
   1. 規則卡片 (Grid Layout)
   ========================================= */
.rules-grid {
    display: grid;
    /* 電腦版兩欄，手機版單欄 */
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.rule-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 20px;
    display: flex;
    align-items: flex-start;
    gap: 15px;
    transition: transform 0.2s, border-color 0.2s;
}

.rule-card:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-3px);
    border-color: var(--primary-gold, #fbb750);
}

.rule-icon {
    font-size: 1.8rem;
    width: 40px;
    text-align: center;
    flex-shrink: 0;
    margin-top: 2px;
}

.rule-text {
    flex-grow: 1;
}

.rule-text strong {
    display: block;
    color: #fff;
    font-size: 1.1rem;
    margin-bottom: 8px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    padding-bottom: 5px;
}

/* 詳細清單樣式 */
.detail-list {
    margin: 0;
    padding-left: 18px;
    color: #ccc;
    font-size: 0.95rem;
    line-height: 1.6;
}

.detail-list li {
    margin-bottom: 4px;
}

/* =========================================
   2. 戰場防護 (Restriction Box)
   ========================================= */
.restriction-box {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 12px;
    padding: 20px;
    border-left: 4px solid #ff5252;
}

.desc-text {
    color: #ddd;
    margin: 0 0 15px 0;
}

.restriction-list {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.res-item {
    background: rgba(255, 82, 82, 0.1);
    border: 1px solid rgba(255, 82, 82, 0.3);
    padding: 8px 16px;
    border-radius: 30px;
    color: #ff8a80;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
}

.res-item i { color: #ff5252; }

/* =========================================
   3. 城堡獎勵卡片
   ========================================= */
.castle-rewards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.reward-card {
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid rgba(255,255,255,0.1);
    display: flex;
    flex-direction: column;
}

/* 肯特與奇岩配色 */
.kent { background: linear-gradient(135deg, rgba(33,150,243,0.15), rgba(0,0,0,0.6)); border-top: 3px solid #2196f3; }
.giran { background: linear-gradient(135deg, rgba(255,193,7,0.15), rgba(0,0,0,0.6)); border-top: 3px solid #ffc107; }

.castle-header {
    padding: 15px;
    background: rgba(0,0,0,0.3);
    border-bottom: 1px solid rgba(255,255,255,0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.c-name { font-size: 1.1rem; font-weight: bold; color: #fff; }
.c-time { font-size: 0.85rem; color: #aaa; background: rgba(0,0,0,0.5); padding: 2px 8px; border-radius: 4px; }

.reward-body {
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.reward-icon img {
    width: 48px;
    height: 48px;
    filter: drop-shadow(0 0 5px rgba(255,255,255,0.3));
}

.reward-info h4 {
    margin: 0 0 5px 0;
    color: #fff;
    font-size: 1rem;
}

.ability-text {
    margin: 0;
    color: #ccc;
    font-size: 0.9rem;
    line-height: 1.5;
}

/* =========================================
   4. 通用圖片與顏色
   ========================================= */
.img-container {
    text-align: center;
    background: rgba(0,0,0,0.2);
    padding: 20px;
    border-radius: 12px;
}
.img-container h4 { margin-top: 0; color: #ccc; font-size: 1rem; }
.responsive-img { max-width: 100%; height: auto; border-radius: 6px; }
.shadow-box { box-shadow: 0 5px 15px rgba(0,0,0,0.5); }

/* 顏色工具 */
.text-gold { color: #ffd700; }
.text-blue { color: #64b5f6; }
.text-red { color: #ff5252; }
.text-green { color: #81c784; }
.highlight { color: #ffd700; font-weight: bold; }

.divider { border: 0; border-top: 1px solid rgba(255,255,255,0.1); margin: 40px 0; }
.info-section { margin-bottom: 40px; }

/* RWD */
@media (max-width: 768px) {
    .reward-body { flex-direction: column; text-align: center; }
    .restriction-list { flex-direction: column; }
    .res-item { width: 100%; box-sizing: border-box; }
}