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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 40px;
    text-align: center;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
}

header p {
    opacity: 0.9;
    font-size: 1.1em;
}

.tabs {
    display: flex;
    background: #f8f9fa;
    border-bottom: 1px solid #e0e0e0;
}

.tab-btn {
    flex: 1;
    padding: 20px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1em;
    font-weight: 600;
    color: #666;
    transition: all 0.3s;
}

.tab-btn:hover {
    background: #e9ecef;
}

.tab-btn.active {
    background: white;
    color: #667eea;
    border-bottom: 3px solid #667eea;
}

.tab-content {
    display: none;
    padding: 30px;
}

.tab-content.active {
    display: block;
}

/* Summary Cards */
.summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.card {
    padding: 25px;
    border-radius: 15px;
    color: white;
    text-align: center;
}

.card.income {
    background: linear-gradient(135deg, #27ae60, #2ecc71);
}

.card.expense {
    background: linear-gradient(135deg, #e74c3c, #c0392b);
}

.card.investment {
    background: linear-gradient(135deg, #3498db, #2980b9);
}

.card.balance {
    background: linear-gradient(135deg, #f39c12, #e67e22);
}

.card h3 {
    font-size: 0.9em;
    opacity: 0.9;
    margin-bottom: 10px;
}

.card .amount {
    font-size: 2em;
    font-weight: bold;
    margin-bottom: 5px;
}

.card .count {
    font-size: 0.85em;
    opacity: 0.8;
}

/* Charts */
.charts-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.chart-container {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 15px;
}

.chart-container h3 {
    margin-bottom: 20px;
    color: #333;
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

th, td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid #e0e0e0;
}

th {
    background: #667eea;
    color: white;
    font-weight: 600;
}

tr:hover {
    background: #f8f9fa;
}

/* Recent section */
.recent-section {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 15px;
}

.recent-section h3 {
    margin-bottom: 15px;
    color: #333;
}

/* Filters */
.filters {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    margin-bottom: 25px;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 10px;
}

.filters select,
.filters input,
.filters button {
    padding: 10px 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 0.95em;
}

.filters button {
    background: #667eea;
    color: white;
    border: none;
    cursor: pointer;
    transition: background 0.3s;
}

.filters button:hover {
    background: #5a6fd6;
}

/* Forms */
form {
    max-width: 600px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

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

.form-group label {
    margin-bottom: 8px;
    font-weight: 600;
    color: #333;
}

.form-group input,
.form-group select {
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1em;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: #667eea;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    padding: 15px 40px;
    border: none;
    border-radius: 10px;
    font-size: 1.1em;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    margin-top: 25px;
    padding: 20px;
}

.pagination button {
    padding: 10px 20px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
}

.pagination button:hover {
    background: #5a6fd6;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
}

.modal-content {
    background: white;
    margin: 5% auto;
    padding: 30px;
    border-radius: 15px;
    width: 90%;
    max-width: 600px;
    position: relative;
}

.close {
    position: absolute;
    right: 20px;
    top: 20px;
    font-size: 28px;
    cursor: pointer;
    color: #999;
}

.close:hover {
    color: #333;
}

/* Action buttons */
.action-btn {
    padding: 6px 12px;
    margin: 0 3px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.85em;
}

.action-btn.edit {
    background: #3498db;
    color: white;
}

.action-btn.delete {
    background: #e74c3c;
    color: white;
}

.action-btn:hover {
    opacity: 0.8;
}

/* Type badges */
.badge {
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.85em;
    font-weight: 600;
}

.badge.income {
    background: #d4edda;
    color: #155724;
}

.badge.expense {
    background: #f8d7da;
    color: #721c24;
}

.badge.investment {
    background: #cce5ff;
    color: #004085;
}

/* Responsive */
@media (max-width: 768px) {
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .charts-row {
        grid-template-columns: 1fr;
    }
    
    .summary-cards {
        grid-template-columns: 1fr;
    }
    
    .filters {
        flex-direction: column;
    }
}