/* 基础容器 */
.container {
    background-color: #F5F7FA;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 导航栏 */
.nav-bar {
    background-color: #fff;
    padding-top: var(--status-bar-height);
    padding-left: 0.9375rem;
    padding-right: 0.9375rem;
    height: 2.75rem; 
    box-sizing: content-box;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: -webkit-sticky;
    position: sticky;
    top: 0;
    z-index: 100;
}
.nav-left {
    height: 100%;
    display: flex;
    align-items: center;
    width: 1.875rem;
}
.back-icon {
    width: 1.25rem;
    height: 1.25rem;
    transform: rotate(180deg);
}
.nav-title {
    font-size: 0.875rem; /* 14pt (Strictly enforced) */
    font-weight: bold;
    color: #333;
}
.nav-right {
    width: 1.875rem;
}

/* 内容区域 */
.content-area {
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* Tabs */
.tabs-row {
    background-color: #fff;
    display: flex;
    justify-content: space-around; /* Match Figure 1 spacing */
    padding-top: 0.625rem;
    padding-bottom: 0.0625rem;
    margin-bottom: 0.625rem;
}
.tab-item {
    padding-bottom: 0.5rem;
    font-size: 0.875rem;
    color: #666;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 3.125rem;
}
.tab-item.active {
    font-weight: bold;
    color: #FF6B00; /* Orange text for active */
}
.tab-line {
    width: 1.25rem; /* Little wider line */
    height: 0.125rem;
    background-color: #FF6B00;
    border-radius: 0.125rem;
    position: absolute;
    bottom: 0;
}

/* 列表容器 */
.bill-list {
    flex: 1;
    padding: 0 0.625rem;
    box-sizing: border-box;
}

/* 月份卡片 */
.month-group {
    background-color: #fff;
    border-radius: 0.5rem;
    padding: 0 0.625rem;
    margin-bottom: 0.625rem;
    box-shadow: 0 0.0625rem 0.1875rem rgba(0,0,0,0.02);
}
.group-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0.3125rem;
    /* No border bottom for header in card view usually, or light one */
    border-bottom: 0.03125rem solid #f9f9f9;
}
.month-title {
    font-size: 0.9375rem;
    font-weight: bold;
    color: #333;
}
.month-summary {
    font-size: 0.75rem;
    color: #999;
}

/* 列表项 */
.list-item {
    display: flex;
    align-items: center;
    padding: 0.9375rem 0.3125rem;
    border-bottom: 0.03125rem solid #f9f9f9;
}
.list-item:last-child {
    border-bottom: none;
}

/* 左侧图标 */
.item-icon-box {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-right: 0.625rem;
    flex-shrink: 0;
}
.item-icon-box.income {
    background-color: #EEF9F2; /* Light Green */
}
.item-icon-box.expense {
    background-color: #FFF0F0; /* Light Red */
}
.item-icon-symbol {
    font-size: 1.25rem;
    font-weight: 300;
    line-height: 1;
    margin-top: -0.125rem; /* Visual center adjustment */
}
.item-icon-box.income .item-icon-symbol {
    color: #4CAF50;
}
.item-icon-box.expense .item-icon-symbol {
    color: #FF4D4F;
}

/* 中间内容 */
.item-center {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    height: 2.5rem;
}
.item-title {
    font-size: 0.875rem;
    font-weight: 500;
    color: #333;
}
.item-desc {
    font-size: 0.6875rem;
    color: #999;
    margin-top: 0.25rem;
}

/* 右侧数据 */
.item-right {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    justify-content: space-around;
    height: 2.5rem;
    margin-left: 0.3125rem;
}
.item-amount {
    font-size: 0.9375rem;
    font-weight: bold;
}
.item-amount.income {
    color: #4CAF50;
}
.item-amount.expense {
    color: #333;
}
.item-tag {
    display: inline-flex;
    justify-content: flex-end;
    margin-top: 0.1875rem;
}
.item-tag uni-text {
    background-color: #FFFFFF;
    border: 0.03125rem solid #eee;
    padding: 0.0625rem 0.25rem;
    border-radius: 0.1875rem;
    font-size: 0.625rem;
    color: #999;
}
.list-padding-bottom {
    height: 1.25rem;
}