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

:root {
    --primary: #5e72e4;
    --success: #2dce89;
    --danger: #f5365c;
    --warning: #fb6340;
    --info: #11cdef;
    --dark: #172b4d;
    --secondary: #8898aa;
    --light: #f8f9fe;
    --white: #ffffff;
    --gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: #f7fafc;
    color: var(--dark);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
.header {
    background: var(--gradient);
    color: white;
    padding: 2rem 0;
    margin-bottom: 2rem;
    border-radius: 0 0 50px 50px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.header-content {
    text-align: center;
}

.header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

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

/* Dashboard Cards */
.dashboard {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 2rem;
}

.card {
    background: white;
    border-radius: 15px;
    padding: 1.5rem;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}

.card-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin-bottom: 1rem;
}

.card-income .card-icon { background: rgba(45, 206, 137, 0.1); color: var(--success); }
.card-expense .card-icon { background: rgba(245, 54, 92, 0.1); color: var(--danger); }
.card-balance .card-icon { background: rgba(94, 114, 228, 0.1); color: var(--primary); }
.card-budget .card-icon { background: rgba(251, 99, 64, 0.1); color: var(--warning); }

.card-title {
    font-size: 0.875rem;
    color: var(--secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.5rem;
}

.card-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark);
}

.card-subtitle {
    font-size: 0.875rem;
    color: var(--secondary);
    margin-top: 0.5rem;
}

/* Main Content Grid */
.main-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 2rem;
}

@media (max-width: 768px) {
    .main-grid {
        grid-template-columns: 1fr;
    }
}

/* Transaction Form */
.transaction-form {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
}

.form-title {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--dark);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--dark);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid #e9ecef;
    border-radius: 10px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

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

.transaction-type {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 1.5rem;
}

.type-btn {
    padding: 0.75rem;
    border: 2px solid #e9ecef;
    background: white;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
}

.type-btn.active {
    color: white;
}

.type-btn.income.active {
    background: var(--success);
    border-color: var(--success);
}

.type-btn.expense.active {
    background: var(--danger);
    border-color: var(--danger);
}

.btn {
    padding: 0.75rem 2rem;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
}

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

.btn-primary:hover {
    background: #4c63d2;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(94, 114, 228, 0.3);
}

.btn-secondary {
    background: var(--secondary);
    color: white;
    margin: 0.5rem;
    width: auto;
}

.btn-secondary:hover {
    background: #7a8a9e;
}

.btn-danger {
    background: var(--danger);
    color: white;
    margin: 0.5rem;
    width: auto;
}

.btn-danger:hover {
    background: #d32f4c;
}

/* Transaction List */
.transaction-list {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    max-height: 600px;
    overflow-y: auto;
}

.list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.filter-btn {
    padding: 0.5rem 1rem;
    border: 1px solid #e9ecef;
    background: white;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.875rem;
    margin-left: 0.5rem;
}

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

.transaction-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid #f0f0f0;
    transition: background 0.3s ease;
}

.transaction-item:hover {
    background: #f8f9fa;
}

.transaction-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

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

.transaction-icon.income {
    background: rgba(45, 206, 137, 0.1);
    color: var(--success);
}

.transaction-icon.expense {
    background: rgba(245, 54, 92, 0.1);
    color: var(--danger);
}

.transaction-details h4 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
    color: var(--dark);
}

.transaction-details p {
    font-size: 0.875rem;
    color: var(--secondary);
}

.transaction-amount {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.amount {
    font-size: 1.25rem;
    font-weight: 700;
}

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

.delete-btn {
    background: none;
    border: none;
    color: var(--danger);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 8px;
    transition: background 0.3s ease;
}

.delete-btn:hover {
    background: rgba(245, 54, 92, 0.1);
}

/* Budget Section */
.budget-section {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    margin-bottom: 2rem;
}

.budget-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.add-budget-btn {
    padding: 0.5rem 1rem;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.add-budget-btn:hover {
    background: #4c63d2;
}

.budget-item {
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 10px;
}

.budget-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.budget-category {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
}

.budget-numbers {
    text-align: right;
}

.budget-spent {
    font-size: 0.875rem;
    color: var(--secondary);
}

.budget-limit {
    font-size: 1rem;
    font-weight: 600;
    color: var(--dark);
}

.budget-progress {
    height: 8px;
    background: #e9ecef;
    border-radius: 4px;
    overflow: hidden;
}

.budget-progress-bar {
    height: 100%;
    background: var(--success);
    border-radius: 4px;
    transition: width 0.3s ease;
}

.budget-progress-bar.warning {
    background: var(--warning);
}

.budget-progress-bar.danger {
    background: var(--danger);
}

.budget-actions {
    display: flex;
    gap: 0.5rem;
}

.budget-delete {
    background: none;
    border: none;
    color: var(--danger);
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.875rem;
    transition: background 0.3s ease;
}

.budget-delete:hover {
    background: rgba(245, 54, 92, 0.1);
}

/* Charts */
.chart-container {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    margin-bottom: 2rem;
}

.chart-wrapper {
    position: relative;
    height: 300px;
    margin-top: 1rem;
}

/* Statistics Section */
.stats-section {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    margin-bottom: 2rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 1.5rem;
}

.stat-card {
    background: #f8f9fa;
    padding: 1.5rem;
    border-radius: 10px;
}

.stat-card h3 {
    font-size: 1rem;
    margin-bottom: 1rem;
    color: var(--secondary);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--secondary);
}

.category-stat {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
    border-bottom: 1px solid #e9ecef;
}

.category-stat:last-child {
    border-bottom: none;
}

/* Data Section */
.data-section {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    margin-bottom: 2rem;
}

.data-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 1rem;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    width: 90%;
    max-width: 500px;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.close-modal {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--secondary);
}

/* Notifications */
#notificationContainer {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 2000;
}

.notification {
    background: white;
    border-radius: 10px;
    padding: 1rem 1.5rem;
    margin-bottom: 10px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    display: flex;
    align-items: center;
    gap: 1rem;
    animation: slideInRight 0.3s ease;
    min-width: 300px;
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.notification.success {
    border-left: 4px solid var(--success);
}

.notification.error {
    border-left: 4px solid var(--danger);
}

.notification.info {
    border-left: 4px solid var(--info);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--secondary);
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #555;
}

/* Responsive */
@media (max-width: 768px) {
    .header h1 {
        font-size: 2rem;
    }
    
    .dashboard {
        grid-template-columns: 1fr;
    }
    
    .card-value {
        font-size: 1.5rem;
    }
    
    .transaction-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .transaction-amount {
        width: 100%;
        justify-content: space-between;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
}