:root {
    --primary-color: #3b82f6;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --secondary-color: #64748b;
    --light-bg: #f8fafc;
    --border-color: #e2e8f0;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--light-bg);
    color: var(--text-primary);
}

.container-fluid {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 240px;
    background: white;
    border-right: 1px solid var(--border-color);
    padding: 24px 16px;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 12px;
    margin-bottom: 32px;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: var(--primary-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
}

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

.nav-item {
    margin-bottom: 8px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    text-decoration: none;
    color: var(--text-secondary);
    border-radius: 8px;
    transition: all 0.2s;
    font-size: 14px;
}

.nav-link:hover {
    background: var(--light-bg);
    color: var(--text-primary);
}

.nav-link.active {
    background: #eff6ff;
    color: var(--primary-color);
    font-weight: 500;
}

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

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 240px;
    padding: 32px;
}

.page-header {
    margin-bottom: 32px;
}

.page-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

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

/* Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.stat-card {
    background: white;
    border-radius: 12px;
    padding: 24px;
    border: 1px solid var(--border-color);
    transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.stat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.stat-title {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

.stat-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.stat-icon.income {
    background: #dcfce7;
    color: var(--success-color);
}

.stat-icon.expense {
    background: #fee2e2;
    color: var(--danger-color);
}

.stat-icon.balance {
    background: #dbeafe;
    color: var(--primary-color);
}

.stat-icon.count {
    background: #e0e7ff;
    color: #6366f1;
}

.stat-value {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-value.success {
    color: var(--success-color);
}

.stat-value.danger {
    color: var(--danger-color);
}

/* Card */
.card {
    background: white;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    padding: 24px;
    margin-bottom: 24px;
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

/* System Info */
.system-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

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

.info-value {
    font-size: 14px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success-color);
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border-radius: 8px;
    border: none;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s;
    text-decoration: none;
}

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

.btn-primary:hover {
    background: #2563eb;
}

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

.btn-success:hover {
    background: #059669;
}

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

.btn-danger:hover {
    background: #dc2626;
}

.btn-outline {
    background: white;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-outline:hover {
    background: var(--light-bg);
}

/* Filter Section */
.filter-section {
    background: white;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    padding: 24px;
    margin-bottom: 24px;
}

.filter-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.filter-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.filter-label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
}

.filter-select {
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    color: var(--text-primary);
    background: white;
    cursor: pointer;
}

.filter-select:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Transaction List */
.transaction-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.transaction-item {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: start;
    transition: all 0.2s;
}

.transaction-item:hover {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.transaction-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 500;
    margin-bottom: 8px;
}

.badge-income {
    background: #dcfce7;
    color: var(--success-color);
}

.badge-expense {
    background: #fee2e2;
    color: var(--danger-color);
}

.transaction-id {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.transaction-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.transaction-meta {
    font-size: 13px;
    color: var(--text-secondary);
}

.transaction-right {
    text-align: right;
    display: flex;
    align-items: center;
    gap: 12px;
}

.transaction-amount {
    font-size: 20px;
    font-weight: 700;
}

.amount-income {
    color: var(--success-color);
}

.amount-expense {
    color: var(--danger-color);
}

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

.btn-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: white;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.2s;
    text-decoration: none;
}

.btn-icon:hover {
    background: var(--light-bg);
    color: var(--text-primary);
}

/* Form */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-control {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    color: var(--text-primary);
    transition: border-color 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
}

textarea.form-control {
    min-height: 100px;
    resize: vertical;
}

/* Export Section */
.export-section {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.export-buttons {
    display: flex;
    gap: 12px;
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.mt-4 {
    margin-top: 32px;
}

.mb-4 {
    margin-bottom: 32px;
}

.d-flex {
    display: flex;
}

.justify-between {
    justify-content: space-between;
}

.align-center {
    align-items: center;
}

.gap-2 {
    gap: 16px;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        width: 200px;
    }
    
    .main-content {
        margin-left: 200px;
        padding: 16px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .filter-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    .container-fluid {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        position: relative;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .main-content {
        margin-left: 0;
    }
}