/* ============================================================
   auxiliary.css - 辅助功能样式
   包含：错题本 + 奖励中心
   ============================================================ */

/* ============================================================
   错题本
   ============================================================ */
.page-errorbook {
    animation: pageFadeIn 0.3s ease;
}

.errorbook-header {
    text-align: center;
    margin-bottom: 20px;
}

.errorbook-header h2 {
    font-size: 36px;
    color: var(--chinese-color);
    text-shadow: 0 2px 0 rgba(231, 76, 60, 0.2);
}

.errorbook-header p {
    font-size: 18px;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* 统计卡 */
.error-stats {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 10px;
    margin-bottom: 20px;
}

.error-stat-card {
    background: var(--bg-card);
    padding: 14px 8px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-soft);
    text-align: center;
    border-top: 4px solid var(--chinese-color);
}

.error-stat-card:nth-child(3) { border-color: var(--chinese-color); }
.error-stat-card:nth-child(4) { border-color: var(--math-color); }
.error-stat-card:nth-child(5) { border-color: var(--english-color); }

.stat-num {
    font-size: 28px;
    font-family: 'Fredoka', sans-serif;
    font-weight: 700;
    color: var(--grass-dark);
    line-height: 1;
}

.stat-label {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* 学科筛选 */
.error-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
    padding: 10px;
    background: rgba(255, 255, 255, 0.6);
    border-radius: var(--radius-md);
}

.filter-btn {
    padding: 8px 16px;
    background: var(--bg-card);
    border: 2px solid var(--text-secondary);
    border-radius: var(--radius-full);
    font-size: 15px;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.filter-btn:hover {
    border-color: var(--chinese-color);
    color: var(--chinese-color);
}

.filter-btn.active {
    background: var(--chinese-color);
    border-color: var(--chinese-color);
    color: white;
    box-shadow: var(--shadow-soft);
}

/* 错题列表 */
.error-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.error-card {
    background: var(--bg-card);
    padding: 18px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    border-left: 6px solid var(--chinese-color);
    animation: cardSlideIn 0.3s ease;
}

.error-card.subject-math { border-left-color: var(--math-color); }
.error-card.subject-english { border-left-color: var(--english-color); }

@keyframes cardSlideIn {
    from { opacity: 0; transform: translateX(-10px); }
    to { opacity: 1; transform: translateX(0); }
}

.error-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
    flex-wrap: wrap;
    gap: 6px;
}

.error-subject-tag {
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 700;
    color: white;
}

.error-subject-tag.chinese { background: var(--chinese-color); }
.error-subject-tag.math { background: var(--math-color); }
.error-subject-tag.english { background: var(--english-color); }

.error-type {
    font-size: 13px;
    color: var(--text-secondary);
}

.error-count {
    font-size: 13px;
    color: var(--chinese-color);
    font-weight: 700;
}

.error-question {
    font-size: 24px;
    font-family: 'Fredoka', sans-serif;
    font-weight: 700;
    color: var(--grass-dark);
    margin-bottom: 10px;
    padding: 12px;
    background: rgba(231, 76, 60, 0.05);
    border-radius: var(--radius-md);
}

.error-answers {
    display: flex;
    gap: 12px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.error-answer-box {
    flex: 1;
    min-width: 140px;
    padding: 10px;
    border-radius: var(--radius-md);
    text-align: center;
}

.error-answer-box.wrong {
    background: rgba(231, 76, 60, 0.1);
    border: 2px solid var(--chinese-color);
}

.error-answer-box.correct {
    background: rgba(107, 191, 89, 0.1);
    border: 2px solid var(--grass-primary);
}

.answer-label {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.answer-value {
    font-size: 22px;
    font-family: 'Fredoka', sans-serif;
    font-weight: 700;
}

.error-answer-box.wrong .answer-value { color: var(--chinese-color); }
.error-answer-box.correct .answer-value { color: var(--grass-deep); }

.error-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.error-action-btn {
    padding: 8px 16px;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 600;
    transition: all 0.2s;
    border: 2px solid;
}

.error-action-btn.resolve {
    background: var(--grass-primary);
    border-color: var(--grass-primary);
    color: white;
}

.error-action-btn.resolve:hover {
    background: var(--grass-deep);
}

.error-action-btn.delete {
    background: transparent;
    border-color: var(--text-secondary);
    color: var(--text-secondary);
}

.error-action-btn.delete:hover {
    border-color: var(--chinese-color);
    color: var(--chinese-color);
}

/* 空状态 */
.error-empty {
    text-align: center;
    padding: 60px 20px;
}

.empty-emoji {
    font-size: 80px;
    margin-bottom: 16px;
    animation: bounceY 1.5s ease infinite;
}

@keyframes bounceY {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

.error-empty h3 {
    font-size: 26px;
    color: var(--grass-deep);
    margin-bottom: 8px;
}

.error-empty p {
    font-size: 18px;
    color: var(--text-secondary);
}

/* ============================================================
   奖励中心
   ============================================================ */
.page-reward {
    animation: pageFadeIn 0.3s ease;
}

/* 阳光总览 */
.sunshine-overview {
    background: linear-gradient(135deg, #FFD93D 0%, #FF8C42 100%);
    padding: 28px 20px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-medium);
    margin-bottom: 24px;
    color: white;
    position: relative;
    overflow: hidden;
}

.sunshine-overview::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(255,255,255,0.3) 0%, transparent 70%);
    border-radius: 50%;
}

.sunshine-balance {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
    position: relative;
}

.balance-emoji {
    font-size: 60px;
    animation: spinSun 4s linear infinite;
}

@keyframes spinSun {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.balance-info {
    flex: 1;
}

.balance-num {
    font-size: 56px;
    font-family: 'Fredoka', sans-serif;
    font-weight: 700;
    line-height: 1;
    text-shadow: 2px 2px 0 rgba(0, 0, 0, 0.15);
}

.balance-label {
    font-size: 16px;
    opacity: 0.9;
    margin-top: 4px;
}

.sunshine-meta {
    display: flex;
    gap: 20px;
    padding-top: 16px;
    border-top: 2px dashed rgba(255, 255, 255, 0.4);
    position: relative;
}

.meta-item {
    flex: 1;
}

.meta-label {
    display: block;
    font-size: 13px;
    opacity: 0.85;
    margin-bottom: 2px;
}

.meta-value {
    font-size: 24px;
    font-family: 'Fredoka', sans-serif;
    font-weight: 700;
}

/* 区块标题 */
.reward-section,
.records-section {
    background: var(--bg-card);
    padding: 20px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    margin-bottom: 20px;
    border-top: 6px solid var(--sun-deep);
}

.reward-section h3,
.records-section h3 {
    font-size: 24px;
    color: var(--sun-deep);
    margin-bottom: 16px;
}

/* 奖励网格 */
.reward-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 14px;
}

.reward-card {
    background: linear-gradient(135deg, #FFF8E7 0%, #FFE9B0 100%);
    border: 3px solid var(--sun-deep);
    border-radius: var(--radius-lg);
    padding: 18px 12px;
    text-align: center;
    transition: all 0.2s;
    box-shadow: var(--shadow-soft);
    position: relative;
}

.reward-card:hover {
    transform: translateY(-4px) scale(1.03);
    box-shadow: var(--shadow-medium);
}

.reward-card.locked {
    opacity: 0.5;
    filter: grayscale(0.5);
}

.reward-card.affordable {
    border-color: var(--grass-primary);
    background: linear-gradient(135deg, #E8F5E9 0%, #C8E6C9 100%);
}

.reward-emoji {
    font-size: 56px;
    line-height: 1;
    margin-bottom: 8px;
}

.reward-name {
    font-size: 16px;
    font-weight: 700;
    color: var(--grass-dark);
    margin-bottom: 6px;
    line-height: 1.3;
}

.reward-desc {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.reward-cost {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 14px;
    background: var(--sun-yellow);
    border-radius: var(--radius-full);
    font-size: 16px;
    font-family: 'Fredoka', sans-serif;
    font-weight: 700;
    color: var(--grass-dark);
    margin-bottom: 10px;
    box-shadow: var(--shadow-soft);
}

.reward-btn {
    padding: 8px 20px;
    background: var(--sun-deep);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
}

.reward-btn:hover:not(:disabled) {
    background: var(--sun-orange);
    transform: scale(1.05);
}

.reward-btn:disabled {
    background: var(--text-secondary);
    cursor: not-allowed;
    opacity: 0.6;
}

/* 记录列表 */
.records-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 280px;
    overflow-y: auto;
}

.record-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    background: rgba(255, 248, 231, 0.6);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--sun-deep);
    animation: cardSlideIn 0.3s ease;
}

.record-item.earn { border-left-color: var(--grass-primary); }
.record-item.redeem { border-left-color: var(--chinese-color); }

.record-info {
    flex: 1;
    min-width: 0;
}

.record-source {
    font-size: 15px;
    color: var(--text-primary);
    font-weight: 600;
}

.record-date {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 2px;
}

.record-amount {
    font-size: 18px;
    font-family: 'Fredoka', sans-serif;
    font-weight: 700;
}

.record-amount.positive { color: var(--grass-deep); }
.record-amount.negative { color: var(--chinese-color); }

.records-empty {
    text-align: center;
    padding: 30px;
    color: var(--text-secondary);
    font-size: 15px;
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 768px) {
    .error-stats {
        grid-template-columns: repeat(3, 1fr);
    }

    .stat-num {
        font-size: 22px;
    }

    .stat-label {
        font-size: 12px;
    }

    .error-question {
        font-size: 20px;
    }

    .answer-value {
        font-size: 18px;
    }

    .balance-num {
        font-size: 42px;
    }

    .balance-emoji {
        font-size: 48px;
    }

    .reward-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .reward-emoji {
        font-size: 44px;
    }
}

@media (max-width: 480px) {
    .error-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .sunshine-meta {
        flex-direction: column;
        gap: 8px;
    }

    .reward-grid {
        grid-template-columns: 1fr;
    }
}