/* ===== 题库面板 ===== */
.bank-panel {
    width: 100%;
    max-width: 600px;
    text-align: left;
}

.bank-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.bank-panel-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-main);
}

.bank-clear-btn {
    padding: 6px 14px;
    font-size: 12px;
    border: 1px solid #fca5a5;
    background: #fff5f5;
    color: #dc2626;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}
.bank-clear-btn:hover {
    background: #fee2e2;
}

/* ===== 题库卡片 ===== */
.bank-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.bank-empty {
    text-align: center;
    padding: 40px 20px;
}

.bank-card {
    background: var(--card-bg);
    border: 1px solid var(--border-light);
    border-radius: 14px;
    padding: 16px;
    transition: box-shadow 0.2s;
}
.bank-card:hover {
    box-shadow: 0 4px 16px rgba(0,0,0,0.06);
}

.bank-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.bank-card-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-main);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
    margin-right: 8px;
}

.bank-card-actions {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
}

.bank-action-btn {
    width: 32px;
    height: 32px;
    border: none;
    background: var(--bg-subtle);
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}
.bank-action-btn:hover {
    background: #e2e8f0;
}
.bank-action-delete:hover {
    background: #fee2e2;
}

/* ===== 统计 ===== */
.bank-card-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    margin-bottom: 12px;
}

.bank-stat {
    text-align: center;
    padding: 8px 4px;
    background: var(--bg-subtle);
    border-radius: 10px;
}

.bank-stat-num {
    display: block;
    font-size: 18px;
    font-weight: 700;
    color: var(--text-main);
}

.bank-stat-label {
    display: block;
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 2px;
}

.bank-stat-correct .bank-stat-num { color: var(--correct-text); }
.bank-stat-wrong .bank-stat-num { color: var(--wrong-text); }
.bank-stat-pending .bank-stat-num { color: #f59e0b; }

/* ===== 进度条 ===== */
.bank-progress-bar {
    height: 6px;
    background: #f1f5f9;
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 12px;
}

.bank-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), #818cf8);
    border-radius: 3px;
    transition: width 0.4s ease;
}

/* ===== 底部按钮 ===== */
.bank-card-footer {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.bank-start-btn {
    flex: 1;
    min-width: 100px;
    padding: 8px 12px;
    font-size: 13px;
    font-weight: 600;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s;
    background: var(--primary-color);
    color: white;
}
.bank-start-btn:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.bank-start-wrong {
    background: var(--wrong-text);
}

.bank-start-pending {
    background: #f59e0b;
}

/* ===== 可点击统计 ===== */
.bank-stat-clickable {
    cursor: pointer;
    transition: all 0.2s;
    border: 2px solid transparent;
}
.bank-stat-clickable:hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(78,110,242,0.15);
    transform: translateY(-2px);
    background: #f0f7ff;
}

/* ===== 题目详情面板 ===== */
.bank-detail-panel {
    margin-top: 16px;
}

.bank-detail-header {
    margin-bottom: 12px;
}

.bank-detail-back {
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 600;
    border: 1px solid var(--border-light);
    background: white;
    border-radius: 10px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.2s;
}
.bank-detail-back:hover {
    background: var(--bg-subtle);
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.bank-detail-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-light);
}

.bank-detail-empty {
    text-align: center;
    padding: 30px;
    color: var(--text-secondary);
    font-size: 14px;
}

.bank-detail-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.bank-detail-item {
    padding: 14px;
    border-radius: 12px;
    border: 1px solid var(--border-light);
    background: var(--bg-subtle);
}
.bank-detail-item.detail-correct {
    border-left: 4px solid var(--correct-text);
}
.bank-detail-item.detail-wrong {
    border-left: 4px solid var(--wrong-text);
}
.bank-detail-item.detail-pending {
    border-left: 4px solid #f59e0b;
}

.bank-detail-q {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-main);
    line-height: 1.5;
    margin-bottom: 8px;
}

.bank-detail-idx {
    color: var(--primary-color);
    font-weight: 700;
}

.bank-detail-options {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 8px;
}

.bank-detail-opt {
    font-size: 13px;
    color: var(--text-secondary);
    padding: 4px 8px;
    border-radius: 6px;
}
.bank-detail-opt.opt-correct {
    background: var(--correct-color);
    color: var(--correct-text);
    font-weight: 600;
}
.bank-detail-opt.opt-wrong {
    background: var(--wrong-color);
    color: var(--wrong-text);
}

.bank-detail-meta {
    font-size: 12px;
    color: var(--text-secondary);
    padding-top: 6px;
    border-top: 1px dashed var(--border-light);
}

.bank-detail-explain {
    margin-top: 6px;
    padding: 8px;
    background: #fff8e1;
    border-radius: 8px;
    font-size: 12px;
    color: #666;
    line-height: 1.5;
}

/* ===== 保存到题库按钮 ===== */
.btn-save-bank {
    background: linear-gradient(135deg, #6366f1, #818cf8);
    color: white;
    border: none;
    font-weight: 600;
    transition: all 0.2s;
}
.btn-save-bank:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99,102,241,0.3);
}


/* ===== 保存到题库对话框 ===== */
.bank-save-input {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-light);
    border-radius: 10px;
    font-size: 14px;
    margin-top: 10px;
    background: var(--bg-subtle);
}
.bank-save-input:focus {
    outline: none;
    border-color: var(--primary-color);
    background: #fff;
}

/* ===== 题目选择弹窗 ===== */
.question-select-overlay {
    z-index: 2000;
}

.question-select-box {
    background: #fff;
    border-radius: 16px;
    width: 90%;
    max-width: 500px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 60px rgba(0,0,0,0.2);
    animation: qsPopIn 0.2s ease;
}

@keyframes qsPopIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

.question-select-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid #f0f0f0;
    font-size: 16px;
    font-weight: 700;
    color: var(--text-main);
}

.question-select-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 20px;
    background: #f8fafc;
    border-bottom: 1px solid #f0f0f0;
    font-size: 13px;
}

.select-all-label {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    color: var(--text-main);
    font-weight: 600;
}

.select-count {
    color: var(--primary-color);
    font-weight: 600;
}

.question-select-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px 12px;
    min-height: 0;
}

.qs-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 10px 8px;
    border-radius: 10px;
    transition: background 0.15s;
    cursor: pointer;
}
.qs-item:hover {
    background: #f1f5f9;
}

.qs-item input[type="checkbox"] {
    margin-top: 3px;
    flex-shrink: 0;
    width: 16px;
    height: 16px;
    accent-color: var(--primary-color);
}

.qs-item-num {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    border-radius: 8px;
    background: #f1f5f9;
    color: #64748b;
    font-size: 12px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}

.qs-item-text {
    flex: 1;
    font-size: 13px;
    color: #333;
    line-height: 1.5;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.question-select-footer {
    padding: 14px 20px;
    border-top: 1px solid #f0f0f0;
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
    flex-shrink: 0;
}

.bank-name-row {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.bank-name-select {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    font-size: 13px;
    background: #f8fafc;
    color: var(--text-secondary);
    cursor: pointer;
    transition: border-color 0.2s;
    box-sizing: border-box;
    appearance: auto;
}
.bank-name-select:focus {
    outline: none;
    border-color: var(--primary-color);
    background: #fff;
}
.bank-name-select option[value=""] {
    color: var(--text-secondary);
}

.bank-name-input {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    font-size: 14px;
    background: #f8fafc;
    transition: border-color 0.2s;
    box-sizing: border-box;
}
.bank-name-input:focus {
    outline: none;
    border-color: var(--primary-color);
    background: #fff;
}

.question-select-footer .btn-primary {
    flex-shrink: 0;
    white-space: nowrap;
    align-self: flex-end;
}