/* ===== 全局样式 - 财务记账系统 ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --primary-light: #e0e7ff;
    --success: #10b981;
    --success-light: #d1fae5;
    --danger: #ef4444;
    --danger-light: #fee2e2;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --info: #3b82f6;
    --info-light: #dbeafe;
    --bg: #f5f7fa;
    --sidebar-bg: linear-gradient(180deg, #1e1b4b 0%, #0f0f23 100%);
    --card-bg: #fff;
    --text: #1f2937;
    --text-light: #6b7280;
    --text-muted: #9ca3af;
    --border: #e5e7eb;
    --radius: 16px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,.04);
    --shadow-md: 0 4px 12px rgba(0,0,0,.08);
    --shadow-lg: 0 8px 24px rgba(0,0,0,.12);
    --shadow-xl: 0 16px 48px rgba(0,0,0,.16);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }

/* ===== 侧边栏 ===== */
.sidebar {
    position: fixed;
    left: 0; top: 0; bottom: 0;
    width: 260px;
    background: var(--sidebar-bg);
    color: #fff;
    z-index: 100;
    overflow-y: auto;
    transition: transform .35s cubic-bezier(.4,0,.2,1);
}

.sidebar-logo {
    padding: 28px 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    position: relative;
}

.sidebar-logo::after {
    content: '';
    position: absolute;
    bottom: 0; left: 24px; right: 24px;
    height: 1px;
    background: rgba(255,255,255,.06);
}

.sidebar-logo .logo-icon {
    width: 44px; height: 44px;
    background: linear-gradient(135deg, var(--primary) 0%, #7c3aed 100%);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    box-shadow: 0 4px 16px rgba(79,70,229,.3);
}

.sidebar-logo span {
    font-size: 22px;
    font-weight: 700;
    background: linear-gradient(135deg, #fff 0%, #e0e7ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar-nav { padding: 8px 0; }
.sidebar-nav .nav-section {
    padding: 18px 24px 8px;
    font-size: 11px;
    text-transform: uppercase;
    color: rgba(255,255,255,.25);
    letter-spacing: 1.5px;
    font-weight: 600;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 13px 24px;
    color: rgba(255,255,255,.55);
    font-size: 14px;
    font-weight: 500;
    transition: all .25s;
    position: relative;
    overflow: hidden;
}

.sidebar-nav a::before {
    content: '';
    position: absolute;
    left: 0; top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 24px;
    background: var(--primary);
    border-radius: 0 6px 6px 0;
    opacity: 0;
    transition: opacity .25s;
}

.sidebar-nav a:hover {
    color: #fff;
    background: rgba(255,255,255,.06);
}

.sidebar-nav a.active {
    color: #fff;
    background: rgba(79,70,229,.15);
}

.sidebar-nav a.active::before {
    opacity: 1;
}

.sidebar-nav a .nav-icon {
    width: 22px;
    text-align: center;
    font-size: 18px;
    flex-shrink: 0;
}

/* ===== 主内容区 ===== */
.main-content {
    margin-left: 260px;
    min-height: 100vh;
}

/* ===== 顶部导航栏 ===== */
.top-bar {
    background: var(--card-bg);
    padding: 0 32px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 50;
}

.top-bar .menu-toggle {
    display: none;
    font-size: 26px;
    cursor: pointer;
    background: none;
    border: none;
    color: var(--text);
    padding: 6px;
}

.top-bar .user-info {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 14px;
}

.top-bar .user-avatar {
    width: 42px; height: 42px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary) 0%, #7c3aed 100%);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(79,70,229,.25);
}

.top-bar .user-detail {
    text-align: right;
}

.top-bar .user-detail .user-name {
    font-weight: 600;
    color: var(--text);
    font-size: 14px;
}

.top-bar .user-detail .user-role {
    font-size: 12px;
    color: var(--text-light);
}

.top-bar .logout-btn {
    padding: 8px 20px;
    background: #f3f4f6;
    border: none;
    border-radius: 10px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    color: var(--text-light);
    transition: all .2s;
}

.top-bar .logout-btn:hover { 
    background: var(--danger-light); 
    color: var(--danger); 
}

/* ===== 内容区域 ===== */
.content { padding: 28px 32px; }

.page-header {
    margin-bottom: 28px;
}

.page-header h2 {
    font-size: 26px;
    color: #111827;
    margin-bottom: 6px;
    font-weight: 700;
}

.page-header p {
    color: var(--text-light);
    font-size: 14px;
}

/* ===== 统计卡片 ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
    margin-bottom: 28px;
}

.stat-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 26px 28px;
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: 20px;
    position: relative;
    overflow: hidden;
    transition: transform .25s, box-shadow .25s;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0; right: 0;
    width: 80px;
    height: 80px;
    border-radius: 0 var(--radius) 0 100%;
    opacity: .06;
}

.stat-card.income::before { background: var(--success); }
.stat-card.expense::before { background: var(--danger); }
.stat-card.balance::before { background: var(--info); }
.stat-card.today-in::before { background: var(--warning); }
.stat-card.today-out::before { background: #7c3aed; }

.stat-card .stat-icon {
    width: 56px; height: 56px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    flex-shrink: 0;
    position: relative;
    z-index: 1;
}

.stat-icon.income { background: var(--success-light); color: var(--success); }
.stat-icon.expense { background: var(--danger-light); color: var(--danger); }
.stat-icon.balance { background: var(--info-light); color: var(--info); }
.stat-icon.today-in { background: var(--warning-light); color: var(--warning); }
.stat-icon.today-out { background: #ede9fe; color: #7c3aed; }

.stat-card .stat-info { flex: 1; position: relative; z-index: 1; }
.stat-card .stat-label { font-size: 13px; color: var(--text-light); margin-bottom: 6px; font-weight: 500; }
.stat-card .stat-value { font-size: 28px; font-weight: 700; color: #111827; letter-spacing: -0.5px; }

/* ===== 卡片 ===== */
.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    margin-bottom: 28px;
    overflow: hidden;
}

.card-header {
    padding: 22px 28px;
    border-bottom: 1px solid var(--border);
    font-size: 17px;
    font-weight: 600;
    color: #111827;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-body { padding: 28px; }

/* 图表容器 */
.chart-container {
    position: relative;
    height: 320px;
}
.chart-container canvas { width: 100% !important; }

.charts-row {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 28px;
}

@media (max-width: 900px) {
    .charts-row { grid-template-columns: 1fr; }
}

/* ===== 表格 ===== */
.table-responsive { overflow-x: auto; }

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

table th {
    background: #f9fafb;
    padding: 14px 20px;
    text-align: left;
    font-weight: 600;
    color: #4b5563;
    border-bottom: 2px solid var(--border);
    white-space: nowrap;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

table td {
    padding: 14px 20px;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}

table tbody tr:hover { background: #fafafa; }

table tbody tr {
    transition: background .2s;
}

.amount-income { color: var(--success); font-weight: 600; font-size: 15px; }
.amount-expense { color: var(--danger); font-weight: 600; font-size: 15px; }

/* ===== 表单 ===== */
.form-input, .form-select, .form-textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 14px;
    background: var(--card-bg);
    color: var(--text);
    transition: all .2s;
    font-family: inherit;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(79,70,229,.1);
}

.form-textarea { resize: vertical; min-height: 100px; }
.form-group { margin-bottom: 20px; }
.form-group label { 
    display: block; 
    font-weight: 600; 
    margin-bottom: 8px; 
    font-size: 14px; 
    color: #374151; 
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 600px) { .form-row { grid-template-columns: 1fr; } }

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all .2s;
    font-family: inherit;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,.1) 0%, transparent 50%);
}

.btn-primary { background: linear-gradient(135deg, var(--primary) 0%, #6366f1 100%); color: #fff; box-shadow: 0 4px 14px rgba(79,70,229,.3); }
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(79,70,229,.4); }

.btn-success { background: linear-gradient(135deg, var(--success) 0%, #059669 100%); color: #fff; box-shadow: 0 4px 14px rgba(16,185,129,.3); }
.btn-success:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(16,185,129,.4); }

.btn-danger { background: linear-gradient(135deg, var(--danger) 0%, #dc2626 100%); color: #fff; box-shadow: 0 4px 14px rgba(239,68,68,.3); }
.btn-danger:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(239,68,68,.4); }

.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
}
.btn-outline:hover { background: #f3f4f6; border-color: var(--primary); color: var(--primary); }

.btn-sm { padding: 8px 16px; font-size: 13px; }

.btn-group { display: flex; gap: 10px; flex-wrap: wrap; }

/* ===== 提示消息 ===== */
.alert {
    padding: 16px 20px;
    border-radius: 10px;
    margin-bottom: 20px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-success { background: var(--success-light); color: #065f46; border: 1px solid #a7f3d0; }
.alert-error { background: var(--danger-light); color: #991b1b; border: 1px solid #fecaca; }
.alert-warning { background: var(--warning-light); color: #92400e; border: 1px solid #fde68a; }
.alert-info { background: var(--info-light); color: #1e40af; border: 1px solid #bfdbfe; }

/* ===== 分页 ===== */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 24px;
}
.pagination a, .pagination span {
    padding: 10px 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    color: var(--text);
    font-weight: 500;
    transition: all .2s;
}
.pagination a:hover { background: var(--primary); color: #fff; border-color: var(--primary); }
.pagination .current { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ===== 搜索过滤栏 ===== */
.filter-bar {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    align-items: flex-end;
    margin-bottom: 24px;
    padding: 20px 24px;
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}
.filter-bar .form-group { margin-bottom: 0; }
.filter-bar .form-input, .filter-bar .form-select { width: auto; min-width: 160px; }

/* ===== 登录页面 ===== */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    position: relative;
    overflow: hidden;
}

.login-page::before {
    content: '';
    position: absolute;
    top: -50%; right: -50%;
    width: 800px; height: 800px;
    background: rgba(255,255,255,.08);
    border-radius: 50%;
}

.login-page::after {
    content: '';
    position: absolute;
    bottom: -30%; left: -30%;
    width: 600px; height: 600px;
    background: rgba(255,255,255,.06);
    border-radius: 50%;
}

.login-box {
    background: rgba(255,255,255,.95);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    padding: 56px 48px;
    width: 420px;
    max-width: 90%;
    box-shadow: var(--shadow-xl);
    position: relative;
    z-index: 1;
}

.login-box .login-icon {
    width: 72px; height: 72px;
    background: linear-gradient(135deg, var(--primary) 0%, #7c3aed 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    margin: 0 auto 24px;
    box-shadow: 0 8px 32px rgba(79,70,229,.3);
}

.login-box h2 {
    text-align: center;
    font-size: 28px;
    color: #111827;
    margin-bottom: 8px;
    font-weight: 700;
}

.login-box .login-subtitle {
    text-align: center;
    color: var(--text-light);
    font-size: 14px;
    margin-bottom: 36px;
}

.login-box .btn-primary { 
    width: 100%; 
    padding: 14px; 
    font-size: 16px; 
}

.login-box .form-input {
    padding: 14px 16px;
    font-size: 15px;
}

/* ===== 空状态 ===== */
.empty-state {
    text-align: center;
    padding: 80px 20px;
    color: #ccc;
}

.empty-state .empty-icon { font-size: 72px; margin-bottom: 20px; }
.empty-state p { color: var(--text-muted); font-size: 16px; }

/* ===== 状态标签 ===== */
.badge {
    display: inline-block;
    padding: 5px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.3px;
}

.badge-success { background: var(--success-light); color: #065f46; }
.badge-danger { background: var(--danger-light); color: #991b1b; }
.badge-info { background: var(--info-light); color: #1e40af; }
.badge-warning { background: var(--warning-light); color: #92400e; }

/* ===== 安装页面 ===== */
.install-container {
    max-width: 540px;
    margin: 60px auto;
    padding: 48px;
    background: var(--card-bg);
    border-radius: 20px;
    box-shadow: var(--shadow-xl);
}

.install-container h2 {
    text-align: center;
    margin-bottom: 10px;
    color: #111827;
    font-size: 28px;
    font-weight: 700;
}

.install-container .subtitle {
    text-align: center;
    color: var(--text-light);
    margin-bottom: 36px;
    font-size: 14px;
}

.install-container label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: #374151;
    font-size: 14px;
}

.install-container .form-group {
    margin-bottom: 20px;
}

.install-container .btn-primary {
    width: 100%;
    padding: 14px;
    font-size: 16px;
}

.install-container .login-info {
    margin-top: 24px;
    padding: 20px;
    background: #f8fafc;
    border-radius: 12px;
    text-align: center;
    font-size: 14px;
    color: var(--text-light);
    border: 1px solid var(--border);
}

/* ===== 进度条 ===== */
.progress-bar {
    height: 8px;
    background: #e5e7eb;
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar .progress-fill {
    height: 100%;
    border-radius: 4px;
    transition: width .3s ease;
}

.progress-fill.success { background: linear-gradient(90deg, var(--success), #34d399); }
.progress-fill.warning { background: linear-gradient(90deg, var(--warning), #fbbf24); }
.progress-fill.danger { background: linear-gradient(90deg, var(--danger), #f87171); }

/* ===== 移动端适配 ===== */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.open {
        transform: translateX(0);
    }
    .main-content {
        margin-left: 0;
    }
    .top-bar .menu-toggle {
        display: block;
    }
    .top-bar {
        padding: 0 16px;
        height: 64px;
    }
    .top-bar .user-detail {
        display: none;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    .stat-card {
        padding: 20px;
        gap: 12px;
    }
    .stat-card .stat-icon {
        width: 48px; height: 48px;
        font-size: 24px;
    }
    .stat-card .stat-value { font-size: 22px; }
    .content { padding: 16px; }
    .page-header h2 { font-size: 22px; }
    .card-body { padding: 16px; }
    .card-header { padding: 16px; font-size: 15px; }
    .login-box {
        padding: 40px 32px;
        width: 90%;
    }
}

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

/* 侧边栏遮罩 */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.4);
    z-index: 99;
    backdrop-filter: blur(4px);
}
@media (max-width: 768px) {
    .sidebar-overlay.show { display: block; }
}

/* 弹窗 */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.5);
    z-index: 200;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
}

.modal-overlay.show { display: flex; }

.modal-content {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 28px;
    width: 90%;
    max-width: 480px;
    box-shadow: var(--shadow-xl);
    animation: modalIn .25s ease;
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(.95) translateY(10px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-content h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    color: #111827;
}

.modal-content .modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 24px;
}

/* 操作按钮组 */
.action-buttons {
    display: flex;
    gap: 6px;
}

.action-buttons .btn {
    padding: 6px 12px;
    font-size: 12px;
}