/* ========== 全局 ========== */
:root {
    --primary: #4f46e5;
    --primary-light: #6366f1;
    --primary-dark: #4338ca;
    --income: #16a34a;
    --expense: #dc2626;
    --warning: #f59e0b;
    --bg: #f8fafc;
    --card-bg: #ffffff;
    --text: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --radius: 12px;
    --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-lg: 0 4px 6px rgba(0,0,0,0.05), 0 10px 15px rgba(0,0,0,0.05);
    --nav-h: 56px;
    --tabbar-h: 60px;
    --safe-bottom: env(safe-area-inset-bottom, 0px);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* ========== 导航栏（顶部，仅标题） ========== */
.navbar {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    height: var(--nav-h);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
}

.nav-brand {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
}

.nav-brand .logo { font-size: 22px; }

/* 桌面端导航链接 */
.nav-links { display: flex; gap: 4px; align-items: center; }

.nav-links a {
    text-decoration: none;
    color: var(--text-muted);
    padding: 8px 14px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.15s;
}

.nav-links a:hover { background: var(--bg); color: var(--text); }
.nav-links a.active { background: var(--primary); color: white; }
.nav-links a.logout { color: var(--expense); margin-left: 8px; }

/* 移动端底部 Tab 栏 */
.tabbar {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: calc(var(--tabbar-h) + var(--safe-bottom));
    padding-bottom: var(--safe-bottom);
    background: var(--card-bg);
    border-top: 1px solid var(--border);
    z-index: 200;
    box-shadow: 0 -1px 6px rgba(0,0,0,0.06);
}

.tabbar-inner {
    display: flex;
    height: var(--tabbar-h);
    max-width: 500px;
    margin: 0 auto;
}

.tabbar a {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    text-decoration: none;
    color: var(--text-muted);
    font-size: 11px;
    font-weight: 500;
    transition: color 0.15s;
    -webkit-tap-highlight-color: transparent;
}

.tabbar a .tab-icon { font-size: 20px; line-height: 1; }
.tabbar a.active { color: var(--primary); }

/* ========== 容器 ========== */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 20px 60px;
}

/* ========== 卡片 ========== */
.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: var(--shadow);
}

.card h3 { font-size: 16px; margin-bottom: 15px; color: var(--text); }

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.card-header h3 { margin: 0; }

/* ========== 统计卡片 ========== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    box-shadow: var(--shadow);
    border-left: 4px solid var(--primary);
}

.stat-card.stat-income { border-left-color: var(--income); }
.stat-card.stat-expense { border-left-color: var(--expense); }
.stat-card.stat-balance { border-left-color: var(--primary); }
.stat-card.stat-budget { border-left-color: var(--warning); }
.stat-card.stat-info { border-left-color: var(--text-muted); }
.stat-card.stat-muted-card { border-left-color: var(--border); }

.stat-icon { font-size: 32px; }
.stat-label { font-size: 13px; color: var(--text-muted); }
.stat-value { font-size: 22px; font-weight: 700; color: var(--text); }
.stat-value.negative { color: var(--expense); }
.stat-sub { font-size: 12px; color: var(--text-muted); font-weight: 400; }

/* ========== 预算进度条 ========== */
.budget-bar-container { margin-bottom: 24px; }

.budget-bar-info {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.budget-bar {
    height: 8px;
    background: var(--border);
    border-radius: 4px;
    overflow: hidden;
}

.budget-bar-fill {
    height: 100%;
    background: var(--income);
    border-radius: 4px;
    transition: width 0.3s;
}

.budget-bar-fill.warning { background: var(--warning); }
.budget-bar-fill.over { background: var(--expense); }

.budget-warning {
    color: var(--expense);
    font-size: 13px;
    margin-top: 6px;
}

/* ========== Dashboard 网格 ========== */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 24px;
}

@media (max-width: 768px) {
    .dashboard-grid { grid-template-columns: 1fr; }
}

/* ========== 表格 ========== */
.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.table-scroll-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.table th {
    text-align: left;
    padding: 10px 12px;
    border-bottom: 2px solid var(--border);
    color: var(--text-muted);
    font-weight: 600;
    font-size: 13px;
}

.table td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
}

.table tr:last-child td { border-bottom: none; }
.table tr:hover td { background: var(--bg); }

.text-right { text-align: right; }
.text-center { text-align: center; }
.text-nowrap { white-space: nowrap; }
.text-income { color: var(--income); font-weight: 600; }
.text-expense { color: var(--expense); font-weight: 600; }
.text-warning { color: var(--warning); font-weight: 600; }
.text-muted { color: var(--text-muted); }

/* ========== 标签 ========== */
.tag {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 12px;
    background: #eef2ff;
    color: var(--primary);
}

.tag-muted { background: var(--bg); color: var(--text-muted); }

.source-tag {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
}

.source-wechat { background: #dcfce7; color: #15803d; }
.source-alipay { background: #dbeafe; color: #1d4ed8; }
.source-bank { background: #fef3c7; color: #b45309; }
.source-manual { background: #f1f5f9; color: var(--text-muted); }

/* ========== 按钮 ========== */
.btn {
    display: inline-block;
    padding: 8px 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--card-bg);
    color: var(--text);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s;
}

.btn:hover { border-color: var(--text-muted); }

.btn-primary {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); }

.btn-danger {
    background: var(--expense);
    color: white;
    border-color: var(--expense);
}

.btn-danger:hover { opacity: 0.9; }

.btn-sm { padding: 4px 10px; font-size: 13px; }
.btn-lg { padding: 12px 24px; font-size: 15px; }
.btn-block { width: 100%; }

/* ========== 表单 ========== */
.form-inline {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    align-items: flex-end;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.form-group label {
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 500;
}

.form-group input,
.form-group select {
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    outline: none;
    transition: border-color 0.15s;
    min-width: 140px;
}

.form-group input:focus,
.form-group select:focus { border-color: var(--primary); }

/* ========== 页面头部 ========== */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.page-header h2 { font-size: 20px; }

/* ========== 月份导航 ========== */
.month-nav {
    display: flex;
    align-items: center;
    gap: 12px;
}

.current-month {
    font-size: 16px;
    font-weight: 600;
    min-width: 120px;
    text-align: center;
}

/* ========== 登录 ========== */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 70vh;
}

.login-card {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    text-align: center;
    width: 360px;
}

.login-card h1 { font-size: 28px; margin-bottom: 8px; }
.login-subtitle { color: var(--text-muted); margin-bottom: 24px; }
.login-input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 16px;
    margin-bottom: 16px;
    outline: none;
}

.login-input:focus { border-color: var(--primary); }
.error { color: var(--expense); font-size: 14px; margin-bottom: 12px; }

/* ========== 导入页面 ========== */
.import-guide { margin-bottom: 20px; }

.guide-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 16px;
    margin-top: 12px;
}

.guide-item {
    display: flex;
    gap: 12px;
    padding: 12px;
    background: var(--bg);
    border-radius: 8px;
}

.guide-icon { font-size: 28px; }
.guide-content h4 { font-size: 14px; margin-bottom: 4px; }
.guide-content p { font-size: 12px; color: var(--text-muted); line-height: 1.5; }

.upload-form { margin-top: 20px; }

.upload-area {
    border: 2px dashed var(--border);
    border-radius: 12px;
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
}

.upload-area:hover, .upload-area.drag-over {
    border-color: var(--primary);
    background: #eef2ff;
}

.upload-icon { font-size: 48px; margin-bottom: 12px; }
.upload-text { font-size: 16px; font-weight: 500; margin-bottom: 6px; }
.upload-hint { font-size: 13px; color: var(--text-muted); margin-bottom: 16px; }

.file-list { margin-top: 16px; }
.file-item {
    padding: 8px 12px;
    background: var(--bg);
    border-radius: 8px;
    margin-bottom: 6px;
    font-size: 14px;
}
.file-size { color: var(--text-muted); font-size: 12px; }

.info-list { padding-left: 20px; line-height: 2; color: var(--text-muted); font-size: 14px; }

/* ========== 预算表单 ========== */
.budget-form-section { margin-bottom: 20px; }

.budget-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
}

.budget-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 10px 0;
}

.budget-row label { font-size: 14px; min-width: 100px; }

.input-group {
    display: flex;
    align-items: center;
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    flex: 1;
}

.input-group .prefix {
    padding: 8px 10px;
    background: var(--bg);
    color: var(--text-muted);
    font-size: 14px;
}

.input-group input {
    border: none;
    padding: 8px 12px;
    font-size: 14px;
    outline: none;
    width: 100%;
}

.hint { font-size: 13px; color: var(--text-muted); margin-bottom: 12px; }

/* ========== 分类管理 ========== */
.cat-icon { font-size: 20px; }
.keywords { color: var(--text-muted); font-size: 13px; max-width: 300px; }

.category-select {
    padding: 4px 8px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 13px;
    background: var(--card-bg);
    cursor: pointer;
}

.category-select:focus { border-color: var(--primary); }

/* ========== 分页 ========== */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    margin-top: 20px;
}

.page-info { color: var(--text-muted); font-size: 14px; }

/* ========== 空状态 ========== */
.empty-state {
    text-align: center;
    padding: 40px;
    color: var(--text-muted);
    font-size: 14px;
}

/* ========== 操作按钮 ========== */
.action-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-top: 20px;
}

/* ========== 底部 ========== */
.footer {
    text-align: center;
    padding: 20px;
    color: var(--text-muted);
    font-size: 13px;
}

/* ========== 响应式 - 移动端 ========== */

/* 平板及以下 */
@media (max-width: 768px) {
    /* 隐藏桌面导航链接，显示底部 Tab */
    .nav-links { display: none; }
    .navbar { padding: 0 16px; height: var(--nav-h); }
    .nav-brand { font-size: 17px; }

    .tabbar { display: block; }

    /* 内容区底部留出 Tab 栏空间 */
    .container {
        padding: 16px 12px calc(var(--tabbar-h) + var(--safe-bottom) + 20px);
    }

    /* 统计卡片 2 列 */
    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
        margin-bottom: 16px;
    }
    .stat-card { padding: 14px 12px; gap: 10px; border-radius: 10px; }
    .stat-icon { font-size: 24px; }
    .stat-label { font-size: 11px; }
    .stat-value { font-size: 17px; }
    .stat-sub { font-size: 11px; }

    /* Dashboard 图表单列 */
    .dashboard-grid { grid-template-columns: 1fr; gap: 16px; }

    .card { padding: 14px; border-radius: 10px; margin-bottom: 14px; }
    .card h3 { font-size: 15px; }

    /* 页面头部 */
    .page-header { flex-direction: row; flex-wrap: wrap; gap: 10px; align-items: center; margin-bottom: 16px; }
    .page-header h2 { font-size: 18px; }

    /* 表格转卡片模式 */
    .table-mobile { display: none; }
    .table-responsive { display: block; }
    .table-responsive .tx-card {
        background: var(--card-bg);
        border-radius: 10px;
        padding: 12px 14px;
        margin-bottom: 8px;
        box-shadow: var(--shadow);
    }
    .tx-card-row {
        display: flex;
        justify-content: space-between;
        align-items: flex-start;
        gap: 8px;
    }
    .tx-card-row + .tx-card-row { margin-top: 6px; }
    .tx-card-desc { font-size: 14px; font-weight: 500; flex: 1; word-break: break-word; }
    .tx-card-amount { font-size: 15px; font-weight: 700; white-space: nowrap; }
    .tx-card-meta { font-size: 12px; color: var(--text-muted); display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
    .tx-card-actions { margin-top: 8px; display: flex; gap: 8px; }

    /* 桌面表格在移动端隐藏 */
    .table-desktop { display: none; }

    /* 筛选栏 */
    .filter-bar { padding: 12px; }
    .form-inline { flex-direction: column; align-items: stretch; gap: 10px; }
    .form-group { width: 100%; }
    .form-group input, .form-group select {
        min-width: 0; width: 100%; font-size: 15px; /* 防 iOS 缩放 */
        padding: 10px 12px;
    }

    /* 手动添加表单 */
    #add-form .form-inline { gap: 12px; }

    /* 按钮：更大触摸区 */
    .btn { padding: 10px 16px; font-size: 14px; }
    .btn-sm { padding: 6px 12px; font-size: 13px; }

    /* 月份导航 */
    .month-nav { gap: 8px; }
    .current-month { font-size: 14px; min-width: 90px; }

    /* 预算网格单列 */
    .budget-grid { grid-template-columns: 1fr; }
    .budget-row { flex-direction: row; }

    /* 导入区域 */
    .upload-area { padding: 28px 16px; }
    .upload-icon { font-size: 36px; }
    .upload-text { font-size: 15px; }
    .upload-hint { font-size: 12px; }

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

    /* 登录页 */
    .login-card { width: calc(100% - 32px); max-width: 360px; padding: 32px 24px; }
    .login-card h1 { font-size: 24px; }
    .login-input { font-size: 16px; /* 防 iOS 缩放 */ }

    /* 分页 */
    .pagination { gap: 8px; }

    /* 分类选择器 */
    .category-select { font-size: 12px; padding: 4px 6px; max-width: 90px; }

    /* 操作按钮 */
    .action-buttons { flex-wrap: wrap; }

    /* 预算进度条信息 */
    .budget-bar-info { font-size: 12px; }
}

/* 小屏手机 */
@media (max-width: 380px) {
    .stats-grid { grid-template-columns: 1fr; }
    .stat-card { padding: 12px; }
    .stat-icon { font-size: 22px; }
    .stat-value { font-size: 16px; }
    .page-header h2 { font-size: 16px; }
}

/* 桌面端隐藏移动端表格卡片 */
@media (min-width: 769px) {
    .table-mobile { display: none; }
}

/* 触摸优化 */
@media (hover: none) and (pointer: coarse) {
    .btn:hover { border-color: var(--border); }
    .btn-primary:hover { background: var(--primary); }
    .nav-links a:hover { background: transparent; color: var(--text-muted); }
    .table tr:hover td { background: transparent; }
}

/* 日期选择器增强 */
input[type="date"] {
    color: var(--text);
    background: var(--card-bg);
    min-height: 44px;
}

input[type="date"]:not([value]),
input[type="date"][value=""] {
    color: var(--text-muted);
}

.date-range-row {
    display: flex;
    gap: 10px;
    align-items: flex-end;
}

.date-range-row .form-group {
    flex: 1;
    margin-bottom: 0;
}

.date-separator {
    padding-bottom: 10px;
    color: var(--text-muted);
    font-size: 14px;
}

/* 移动端筛选栏优化 */
@media (max-width: 768px) {
    .filter-bar { padding: 12px; }
    .filter-bar .form-group { margin-bottom: 4px; }
    .filter-bar .form-group label {
        display: block;
        font-size: 12px;
        margin-bottom: 4px;
        color: var(--text-muted);
    }
    .filter-bar .form-group input,
    .filter-bar .form-group select {
        padding: 12px;
        font-size: 15px;
        border-radius: 10px;
        background: var(--bg);
        border: 1px solid var(--border);
        min-height: 44px;
    }
    .filter-bar input[type="date"] {
        background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%2364748b' viewBox='0 0 16 16'%3E%3Cpath d='M3.5 0a.5.5 0 0 1 .5.5V1h8V.5a.5.5 0 0 1 1 0V1h1a2 2 0 0 1 2 2v11a2 2 0 0 1-2 2H2a2 2 0 0 1-2-2V3a2 2 0 0 1 2-2h1V.5a.5.5 0 0 1 .5-.5zM1 4v10a1 1 0 0 0 1 1h12a1 1 0 0 0 1-1V4H1z'/%3E%3C/svg%3E");
        background-repeat: no-repeat;
        background-position: right 12px center;
        padding-right: 36px;
    }
    .filter-bar .btn {
        padding: 12px;
        font-size: 15px;
        border-radius: 10px;
    }
    .date-range-row { gap: 8px; }
    .date-separator { padding-bottom: 12px; font-size: 13px; }
}