@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

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

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #8b5cf6;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --bg-main: #f8fafc;
    --bg-card: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --border: #e2e8f0;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', sans-serif;
    background: var(--bg-main);
    color: var(--text-primary);
    display: flex;
    min-height: 100vh;
}

/* 侧边栏 */
.sidebar {
    width: 260px;
    background: var(--bg-card);
    border-right: 1px solid var(--border);
    padding: 24px 0;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0 24px 24px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 24px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
}

.nav-menu {
    list-style: none;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 24px;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--text-secondary);
    font-weight: 500;
}

.nav-item:hover {
    background: var(--bg-main);
    color: var(--primary);
}

.nav-item.active {
    background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    border-left: 4px solid var(--primary-dark);
}

.nav-icon {
    font-size: 20px;
}

.sidebar-footer {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 24px;
    border-top: 1px solid var(--border);
}

.logout-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 12px 24px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    border-radius: 8px;
    font-size: 16px;
}

.logout-btn:hover {
    background: var(--bg-main);
    color: var(--danger);
}

/* 主内容区 */
.main-content {
    margin-left: 260px;
    flex: 1;
    padding: 24px;
}

.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

.top-bar h1 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
}

.top-bar-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.rate-badge {
    background: var(--primary);
    color: white;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    transition: all 0.2s;
}

.user-info:hover {
    background: var(--bg-main);
    box-shadow: var(--shadow);
}

.user-icon {
    font-size: 18px;
}

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

/* 页面切换 */
.page {
    display: none;
}

.page.active {
    display: block;
    animation: fadeIn 0.3s;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 统计卡片网格 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.stat-card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: var(--shadow-lg);
    transition: transform 0.2s;
}

.stat-card:hover {
    transform: translateY(-4px);
}

.stat-icon {
    font-size: 48px;
    width: 72px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
}

.budget-card .stat-icon {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.spent-card .stat-icon {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.remaining-card .stat-icon {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.wishlist-card .stat-icon {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
}

.after-wishlist-card .stat-icon {
    background: linear-gradient(135deg, #30cfd0 0%, #330867 100%);
}

.stat-content {
    flex: 1;
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-weight: 500;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.stat-secondary {
    font-size: 16px;
    color: var(--text-secondary);
}

/* 卡片 */
.card {
    background: var(--bg-card);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    margin-bottom: 24px;
    overflow: hidden;
}

.card-header {
    padding: 24px;
    border-bottom: 1px solid var(--border);
}

.card-header h2 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
}

.card-body {
    padding: 24px;
}

/* 筛选器 */
.filter-container {
    margin-bottom: 20px;
    padding: 16px;
    background: var(--bg-main);
    border-radius: 8px;
    border: 1px solid var(--border);
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.filter-group label {
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
}

.filter-group select,
.filter-group input[type="month"] {
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
}

.filter-group input[type="month"]::-webkit-calendar-picker-indicator {
    cursor: pointer;
    filter: invert(0.5);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border);
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background: var(--bg-main);
    border-color: var(--primary);
    color: var(--primary);
}

/* 表单 */
.input-group {
    display: flex;
    gap: 12px;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    gap: 12px;
}

.form-grid-4 {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr auto;
    gap: 12px;
}

.form-grid-5 {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr auto;
    gap: 12px;
}

.wishlist-form-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.form-row {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr auto;
    gap: 12px;
}

input, select {
    padding: 12px 16px;
    border: 2px solid var(--border);
    border-radius: 10px;
    font-size: 15px;
    font-family: inherit;
    transition: all 0.2s;
    background: var(--bg-main);
}

input:focus, select:focus {
    outline: none;
    border-color: var(--primary);
    background: white;
}

.btn-primary {
    padding: 12px 24px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

/* 设置页面 */
.settings-group {
    margin-bottom: 20px;
}

.settings-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-secondary);
}

.settings-group select {
    width: 100%;
}

/* 列表容器 */
.list-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.list-item {
    background: var(--bg-main);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.2s;
}

.list-item:hover {
    box-shadow: var(--shadow);
}

.item-info {
    flex: 1;
}

.item-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.item-date {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.item-amount {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 4px;
}

.item-amount-secondary {
    font-size: 14px;
    color: var(--text-secondary);
}

.item-actions {
    display: flex;
    gap: 8px;
}

.edit-btn {
    padding: 8px 16px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.edit-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

.delete-btn {
    padding: 8px 16px;
    background: var(--danger);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.delete-btn:hover {
    background: #dc2626;
    transform: translateY(-1px);
}

.buy-btn {
    padding: 8px 16px;
    background: var(--success);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.buy-btn:hover {
    background: #059669;
    transform: translateY(-1px);
}

/* 进度条 */
.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--border);
    border-radius: 10px;
    overflow: hidden;
    margin: 12px 0 8px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
    transition: width 0.3s;
    border-radius: 10px;
}

.progress-text {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
}

/* 货币标记 */
.currency-badge {
    display: inline-block;
    padding: 2px 8px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 600;
    margin-left: 8px;
    vertical-align: middle;
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    animation: fadeIn 0.3s;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--bg-card);
    border-radius: 16px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: slideUp 0.3s;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px;
    border-bottom: 1px solid var(--border);
}

.modal-header h2 {
    margin: 0;
    font-size: 20px;
    color: var(--text-primary);
}

.modal-close {
    background: transparent;
    border: none;
    font-size: 32px;
    color: var(--text-secondary);
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    transition: all 0.2s;
    padding: 0;
    line-height: 1;
}

.modal-close:hover {
    background: var(--bg-main);
    color: var(--text-primary);
}

.modal-body {
    padding: 24px;
    max-height: calc(90vh - 180px);
    overflow-y: auto;
}

.modal-footer {
    display: flex;
    gap: 12px;
    padding: 24px;
    border-top: 1px solid var(--border);
    justify-content: flex-end;
}

.btn-secondary {
    padding: 12px 24px;
    background: var(--bg-main);
    color: var(--text-primary);
    border: 2px solid var(--border);
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-secondary:hover {
    background: var(--border);
    transform: translateY(-2px);
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 48px 24px;
    color: var(--text-secondary);
}

.empty-state-icon {
    font-size: 64px;
    margin-bottom: 16px;
}

.empty-state-text {
    font-size: 16px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .sidebar {
        width: 80px;
    }
    
    .logo-text, .nav-text {
        display: none;
    }
    
    .logo {
        justify-content: center;
        padding: 0 0 24px;
    }
    
    .logo-icon {
        width: 32px;
        height: 32px;
    }
    
    .nav-item {
        justify-content: center;
        padding: 12px;
    }
    
    .sidebar-footer {
        padding: 12px;
    }
    
    .logout-btn {
        justify-content: center;
        padding: 12px;
    }
    
    .main-content {
        margin-left: 80px;
    }
    
    .top-bar {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }
    
    .top-bar-right {
        flex-direction: row;
        gap: 8px;
        flex-wrap: wrap;
    }
    
    .rate-badge {
        font-size: 12px;
        padding: 6px 12px;
    }
    
    .user-info {
        font-size: 12px;
        padding: 6px 12px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .form-grid,
    .form-grid-4,
    .form-grid-5,
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .input-group {
        flex-direction: column;
    }
    
    .item-actions {
        flex-direction: column;
    }
    
    .edit-btn, .delete-btn, .buy-btn {
        width: 100%;
    }
    
    .modal-content {
        width: 95%;
        margin: 20px;
    }
    
    .modal-footer {
        flex-direction: column;
    }
    
    .modal-footer button {
        width: 100%;
    }
}

/* 移动端专用元素 */
.mobile-only {
    display: none;
}

/* 危险按钮样式 */
.btn-danger {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

/* 移动端底部导航 */
.mobile-nav {
    display: none; /* 默认隐藏，只在手机端显示 */
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
    padding: 8px 0;
    z-index: 1000;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    justify-content: space-around;
    align-items: center;
}

.mobile-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 8px 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--text-secondary);
    flex: 1;
    text-align: center;
}

.mobile-nav-item.active {
    color: var(--primary-color);
}

.mobile-nav-icon {
    font-size: 24px;
    margin-bottom: 4px;
}

.mobile-nav-text {
    font-size: 12px;
    font-weight: 500;
}

/* 版权信息 */
.page-footer {
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
    text-align: center;
    font-size: 13px;
    color: var(--text-secondary);
}

.page-footer p {
    margin: 6px 0;
}

.page-footer a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.2s;
}

.page-footer a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

@media (max-width: 480px) {
    .sidebar {
        display: none;
    }
    
    .mobile-nav {
        display: flex;
    }
    
    .mobile-only {
        display: block;
    }
    
    .page-footer {
        margin-top: 24px;
        padding-top: 16px;
        font-size: 11px;
        margin-bottom: 20px;
    }
    
    .main-content {
        margin-left: 0;
        padding: 12px;
        padding-bottom: 80px; /* 为底部导航留出空间 */
    }
    
    .top-bar {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
        padding: 12px;
    }
    
    .top-bar h1 {
        font-size: 20px;
    }
    
    .top-bar-right {
        width: 100%;
        justify-content: space-between;
    }
    
    .rate-badge {
        font-size: 11px;
        padding: 4px 10px;
        white-space: nowrap;
    }
    
    .user-info {
        font-size: 11px;
        padding: 4px 10px;
    }
    
    .user-icon {
        font-size: 14px;
    }
    
    .stat-card {
        padding: 16px;
    }
    
    .stat-icon {
        width: 56px;
        height: 56px;
        font-size: 32px;
    }
    
    .stat-value {
        font-size: 24px;
    }
}
.logout-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 12px 24px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    border-radius: 8px;
    font-size: 16px;
}