:root {
    --primary-color: #4361ee;
    --income-color: #4cc9f0;
    --expense-color: #f72585;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --gray-color: #6c757d;
    --border-radius: 8px;
    --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f7ff;
    padding: 20px;
    min-height: 100vh;
}

.app-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.app-header {
    text-align: center;
    margin-bottom: 30px;
}

.app-header h1 {
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 10px;
}

.currency-selector {
    margin: 0 auto;
}

.currency-selector select {
    padding: 8px 12px;
    border-radius: var(--border-radius);
    border: 1px solid #ddd;
}

.app-main {
    flex: 1;
}

.dashboard-columns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.left-column {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.chart-section {
    background: white;
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.chart-section h2 {
    color: var(--dark-color);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.chart-container {
    position: relative;
    height: 250px;
}

.chart-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--gray-color);
}

.chart-placeholder i {
    font-size: 2rem;
    margin-bottom: 10px;
    color: #e9ecef;
}

.history-section {
    background: white;
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    flex-grow: 1;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.section-header h3 {
    color: var(--dark-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.clear-btn {
    background: #ef233c;
    color: white;
    border: none;
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
}

.history-container {
    max-height: 300px;
    overflow-y: auto;
}

#transaction-list {
    list-style: none;
}

.transaction-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 15px;
    border-bottom: 1px solid #eee;
    transition: background-color 0.2s;
}

.transaction-item:hover {
    background-color: #f9f9f9;
}

.transaction-content {
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 1;
    min-width: 0; /* For text overflow */
}

.transaction-text {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 180px;
}

.transaction-amount {
    font-weight: 600;
    margin: 0 15px;
    white-space: nowrap;
}

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

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

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

.action-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.2s;
    opacity: 0.7;
    color: white;
}

.action-btn:hover {
    opacity: 1;
    transform: scale(1.1);
}

.edit-btn {
    background-color: rgba(67, 97, 238, 0.1);
    color: var(--primary-color);
}

.delete-btn {
    background-color: rgba(247, 37, 133, 0.1);
    color: var(--expense-color);
}

.category-icon {
    font-size: 1.3rem;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(0, 0, 0, 0.05);
    border-radius: 50%;
}

.category-icon {
    font-size: 1.2rem;
    width: 24px;
    text-align: center;
}

.empty-state {
    text-align: center;
    padding: 30px 0;
    color: var(--gray-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 150px; /* Adjust as needed */
}

.empty-state i {
    font-size: 2.5rem;
    margin-bottom: 15px;
    color: #e9ecef;
}

.empty-state p {
    margin: 0;
    font-size: 1.1rem;
}

.right-column {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.balance-section {
    background: white;
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    text-align: center;
}

.balance-section h3 {
    color: var(--gray-color);
    margin-bottom: 10px;
}

.balance-amount {
    font-size: 2rem;
    font-weight: bold;
    color: var(--primary-color);
}

.summary-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.summary-card {
    padding: 15px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.summary-card.income {
    background: rgba(76, 201, 240, 0.1);
    border-left: 4px solid var(--income-color);
}

.summary-card.expense {
    background: rgba(247, 37, 133, 0.1);
    border-left: 4px solid var(--expense-color);
}

.summary-card i {
    font-size: 1.5rem;
    opacity: 0.3;
}

.form-section {
    background: white;
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.form-section h3 {
    color: var(--dark-color);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--gray-color);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.submit-btn {
    width: 100%;
    padding: 12px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    font-weight: bold;
    cursor: pointer;
    margin-top: 10px;
}

.app-footer {
    text-align: center;
    padding: 20px 0;
    margin-top: 30px;
    color: var(--gray-color);
}

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