/* ===========================
   AI账单 - 专用样式
   =========================== */

/* 账单说明 */
.bill-intro {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}
.bill-intro-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-main);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}
.bill-intro-icon {
    font-size: 2rem;
    flex-shrink: 0;
    margin-top: 2px;
}
.bill-intro-text strong {
    display: block;
    font-size: var(--text-base);
    color: var(--text-primary);
    margin-bottom: 4px;
}
.bill-intro-text p {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* 上传操作按钮组 */
.upload-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
    justify-content: flex-end;
}

/* 已上传文件列表 */
.uploaded-files {
    margin-top: var(--spacing-md);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}
.uploaded-files-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-main);
    border-bottom: 1px solid var(--border);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-secondary);
}
.uploaded-files-list {
    padding: var(--spacing-sm);
    display: flex;
    flex-direction: column;
    gap: 4px;
    max-height: 200px;
    overflow-y: auto;
}
.uploaded-file-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 6px var(--spacing-sm);
    border-radius: var(--radius-md);
    background: var(--bg-main);
    font-size: var(--text-sm);
}
.uploaded-file-item > i {
    color: var(--primary);
    font-size: 1.1rem;
    flex-shrink: 0;
}
.uploaded-file-name {
    flex: 1;
    min-width: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text-primary);
}
.uploaded-file-size {
    color: var(--text-muted);
    font-size: var(--text-xs);
    flex-shrink: 0;
}
.uploaded-file-remove {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 14px;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}
.uploaded-file-remove:hover {
    background: #FFF5F5;
    color: var(--error);
}

/* 结果头部 */
.bill-result-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}
.bill-result-header h3 {
    margin: 0;
}
.bill-result-actions {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

/* 统计面板 */
.bill-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}
.bill-stat-card {
    background: var(--bg-main);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    text-align: center;
}
.bill-stat-label {
    font-size: var(--text-xs);
    color: var(--text-muted);
    margin-bottom: 4px;
}
.bill-stat-value {
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--text-primary);
}
.stat-income .bill-stat-value {
    color: #16A34A;
}
.stat-expense .bill-stat-value {
    color: #DC2626;
}
.net-positive {
    color: #16A34A !important;
}
.net-negative {
    color: #DC2626 !important;
}

/* 筛选工具栏 */
.bill-filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    align-items: flex-end;
    padding: var(--spacing-md);
    background: var(--bg-main);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
}
.filter-group {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}
.filter-group label {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-secondary);
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 4px;
}
.filter-group input,
.filter-group select {
    padding: 6px 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    background: var(--bg-card);
    color: var(--text-primary);
    min-width: 0;
}
.filter-group input[type="number"] {
    width: 100px;
}
.filter-group input[type="date"] {
    width: 140px;
}
.filter-group select {
    width: 100px;
}
.filter-group span {
    color: var(--text-muted);
    font-size: var(--text-sm);
}

/* 自然语言筛选 */
.bill-nl-filter {
    margin-bottom: var(--spacing-md);
}
.nl-filter-input-wrap {
    display: flex;
    align-items: center;
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--bg-card);
    transition: border-color var(--transition-fast);
    overflow: hidden;
}
.nl-filter-input-wrap:focus-within {
    border-color: var(--primary);
}
.nl-filter-icon {
    font-size: 1.3rem;
    color: var(--text-muted);
    margin-left: var(--spacing-md);
    flex-shrink: 0;
}
.nl-filter-input-wrap input {
    flex: 1;
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--text-sm);
    background: transparent;
    color: var(--text-primary);
    outline: none;
}
.nl-filter-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: var(--primary);
    color: #fff;
    cursor: pointer;
    font-size: 1rem;
    transition: background var(--transition-fast);
    flex-shrink: 0;
    margin: 3px;
    border-radius: var(--radius-md);
}
.nl-filter-btn:hover {
    background: var(--primary-hover, #3B4A6B);
}
.nl-filter-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}
.nl-filter-hint {
    font-size: var(--text-xs);
    color: var(--text-muted);
    margin-top: 6px;
}
.nl-filter-active {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 8px;
    padding: 4px 12px;
    background: rgba(74, 85, 104, 0.08);
    border: 1px solid var(--primary);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    color: var(--primary);
    font-weight: 500;
}
.nl-filter-active button {
    width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    cursor: pointer;
    font-size: 10px;
}

/* 筛选统计 */
.bill-filter-stats {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(74, 85, 104, 0.05);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

/* 账单表格 */
.bill-table-wrap {
    overflow-x: auto;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
}
.bill-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--text-sm);
}
.bill-table thead {
    background: var(--bg-main);
    position: sticky;
    top: 0;
    z-index: 1;
}
.bill-table th {
    padding: 10px 12px;
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 2px solid var(--border);
    white-space: nowrap;
    cursor: pointer;
    user-select: none;
    transition: background var(--transition-fast);
}
.bill-table th:hover {
    background: rgba(74, 85, 104, 0.05);
}
.bill-table th.sorted {
    color: var(--primary);
    background: rgba(74, 85, 104, 0.08);
}
.bill-table th i {
    font-size: 14px;
    opacity: 0.5;
}
.bill-table th.sorted i {
    opacity: 1;
}
.bill-table td {
    padding: 8px 12px;
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
    vertical-align: middle;
}
.bill-table tbody tr:hover {
    background: rgba(74, 85, 104, 0.03);
}
.bill-table tbody tr:last-child td {
    border-bottom: none;
}

/* 表格列样式 */
.td-index {
    width: 40px;
    text-align: center;
    color: var(--text-muted);
    font-size: var(--text-xs);
}
.td-date {
    white-space: nowrap;
    font-variant-numeric: tabular-nums;
}
.td-counterparty {
    max-width: 150px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.td-amount {
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
    text-align: right;
}
.td-amount.dir-income {
    color: #16A34A;
}
.td-amount.dir-expense {
    color: #DC2626;
}
.td-remark {
    max-width: 200px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text-secondary);
    font-size: var(--text-xs);
}
.td-source {
    white-space: nowrap;
    color: var(--text-muted);
    font-size: var(--text-xs);
}

/* 方向标签 */
.direction-tag {
    display: inline-block;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 600;
}
.direction-tag.dir-income {
    background: #DCFCE7;
    color: #16A34A;
}
.direction-tag.dir-expense {
    background: #FEE2E2;
    color: #DC2626;
}

/* 状态标签 */
.status-tag {
    display: inline-block;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 500;
}
.status-tag.status-success {
    background: #DCFCE7;
    color: #16A34A;
}
.status-tag.status-refund {
    background: #FEF3C7;
    color: #D97706;
}
.status-tag.status-other {
    background: #F3F4F6;
    color: #6B7280;
}

/* 空状态 */
.bill-table-empty {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--text-muted);
}
.bill-table-empty i {
    font-size: 3rem;
    display: block;
    margin-bottom: var(--spacing-sm);
    opacity: 0.3;
}
.bill-table-empty p {
    font-size: var(--text-sm);
    margin: 0;
}

/* 历史记录头部按钮组 */
.history-header-actions {
    display: flex;
    gap: var(--spacing-xs);
}

/* 按钮小尺寸 */
.btn-sm {
    padding: 4px 10px !important;
    font-size: var(--text-xs) !important;
}

/* 响应式 */
@media (max-width: 768px) {
    .bill-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    .bill-filter-bar {
        flex-direction: column;
        align-items: stretch;
    }
    .filter-group {
        flex-wrap: wrap;
    }
    .filter-group input[type="number"],
    .filter-group input[type="date"],
    .filter-group select {
        flex: 1;
        min-width: 80px;
    }
    .bill-result-header {
        flex-direction: column;
    }
    .bill-result-actions {
        width: 100%;
    }
    .bill-result-actions button {
        flex: 1;
        min-width: 0;
    }
    .history-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
    .history-header-actions {
        width: 100%;
    }
    .history-header-actions button {
        flex: 1;
    }
}

@media (max-width: 480px) {
    .bill-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }
    .bill-stat-card {
        padding: var(--spacing-sm);
    }
    .bill-stat-value {
        font-size: var(--text-lg);
    }
}

/* 动画增强 */
.setup-card {
    animation: fadeInUp 0.4s ease both;
}
.bill-section {
    animation: fadeInUp 0.3s ease both;
}
.bill-section:nth-child(2) { animation-delay: 60ms; }
.bill-section:nth-child(3) { animation-delay: 120ms; }
.bill-stat-card {
    animation: fadeInUp 0.3s ease both;
}
.bill-stat-card:nth-child(2) { animation-delay: 40ms; }
.bill-stat-card:nth-child(3) { animation-delay: 80ms; }