/* Reset and Base Styles */
* {
    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;
    color: #333;
}

.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 Styles */
header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px;
    text-align: center;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.subtitle {
    font-size: 1.1em;
    opacity: 0.9;
}

/* Main Content */
.main-content {
    padding: 30px;
}

section {
    margin-bottom: 40px;
    padding: 25px;
    background: #f8f9fa;
    border-radius: 15px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

section h2 {
    color: #667eea;
    margin-bottom: 20px;
    font-size: 1.5em;
    border-bottom: 2px solid #667eea;
    padding-bottom: 10px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #555;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 1em;
    transition: border-color 0.3s;
}

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

/* Button Styles */
.btn-primary,
.btn-secondary {
    padding: 12px 30px;
    border: none;
    border-radius: 8px;
    font-size: 1em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    width: 100%;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: #6c757d;
    color: white;
    margin-left: 10px;
}

.btn-secondary:hover {
    background: #5a6268;
}

.btn-danger {
    background: #dc3545;
    color: white;
    padding: 6px 12px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.9em;
}

.btn-danger:hover {
    background: #c82333;
}

/* Budget Section */
.budget-controls {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.budget-controls input {
    flex: 1;
    padding: 12px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 1em;
}

.budget-display {
    display: flex;
    gap: 30px;
    padding: 15px;
    background: white;
    border-radius: 8px;
}

.budget-display p {
    font-size: 1.1em;
    font-weight: 600;
}

.budget-display span {
    color: #667eea;
    font-size: 1.2em;
}

.budget-warning {
    color: #dc3545 !important;
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* Summary Cards */
.summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.summary-card {
    background: white;
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
}

.summary-card:hover {
    transform: translateY(-5px);
}

.summary-card h3 {
    color: #666;
    font-size: 0.9em;
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.summary-card .amount {
    font-size: 2em;
    font-weight: bold;
    color: #667eea;
}

.summary-card .count {
    font-size: 2em;
    font-weight: bold;
    color: #764ba2;
}

/* Filter Section */
.filter-controls {
    display: flex;
    align-items: center;
    gap: 15px;
}

.filter-controls label {
    font-weight: 600;
    color: #555;
}

.filter-controls input[type="month"] {
    padding: 10px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 1em;
}

/* Charts Section */
.charts-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.chart-wrapper {
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.chart-wrapper h3 {
    text-align: center;
    color: #667eea;
    margin-bottom: 15px;
    font-size: 1.1em;
}

.chart-wrapper canvas {
    max-height: 300px;
}

/* Table Styles */
.table-container {
    overflow-x: auto;
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

thead th {
    padding: 15px;
    text-align: left;
    font-weight: 600;
}

tbody tr {
    border-bottom: 1px solid #eee;
    transition: background-color 0.2s;
}

tbody tr:hover {
    background-color: #f8f9fa;
}

tbody td {
    padding: 12px 15px;
}

.empty-message {
    text-align: center;
    color: #999;
    font-style: italic;
    padding: 30px !important;
}

.category-badge {
    display: inline-block;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.85em;
    font-weight: 600;
    text-transform: uppercase;
}

.category-Food {
    background: #ff6b6b;
    color: white;
}

.category-Transport {
    background: #4ecdc4;
    color: white;
}

.category-Education {
    background: #45b7d1;
    color: white;
}

.category-Entertainment {
    background: #f9ca24;
    color: #333;
}

.category-Miscellaneous {
    background: #95a5a6;
    color: white;
}

/* Responsive Design */
@media (max-width: 768px) {
    header h1 {
        font-size: 2em;
    }
    
    .main-content {
        padding: 15px;
    }
    
    section {
        padding: 15px;
    }
    
    .summary-cards {
        grid-template-columns: 1fr;
    }
    
    .charts-container {
        grid-template-columns: 1fr;
    }
    
    .budget-controls {
        flex-direction: column;
    }
    
    .btn-secondary {
        margin-left: 0;
        margin-top: 10px;
    }
    
    table {
        font-size: 0.9em;
    }
}