:root {
    --primary-color: #6c5ce7;
    --secondary-color: #a29bfe;
    --text-color: #2d3436;
    --bg-color: #f5f6fa;
    --card-color: #ffffff;
    --border-color: #dfe6e9;
    --income-color: #00b894;
    --expense-color: #d63031;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.5s ease;
}

.dark-mode {
    --primary-color: #a29bfe;
    --secondary-color: #6c5ce7;
    --text-color: #f5f6fa;
    --bg-color: #2d3436;
    --card-color: #1e272e;
    --border-color: #576574;
    --income-color: #55efc4;
    --expense-color: #ff7675;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Montserrat', sans-serif;
    transition: var(--transition);
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    padding: 20px;
}

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

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    animation: fadeIn 0.5s ease;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.theme-toggle {
    display: flex;
    align-items: center;
    gap: 10px;
}

.switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--border-color);
    transition: .4s;
}

.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: var(--card-color);
    transition: .4s;
}

input:checked + .slider {
    background-color: var(--primary-color);
}

input:checked + .slider:before {
    transform: translateX(26px);
}

.slider.round {
    border-radius: 34px;
}

.slider.round:before {
    border-radius: 50%;
}

.dashboard {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.balance-card {
    background-color: var(--card-color);
    padding: 20px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    animation: slideUp 0.5s ease;
}

.balance-card h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--text-color);
}

#balance {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.income-expense {
    display: flex;
    justify-content: space-between;
    background-color: var(--bg-color);
    padding: 15px;
    border-radius: 8px;
}

.income, .expense {
    text-align: center;
    flex: 1;
}

.income h4, .expense h4 {
    font-size: 1rem;
    margin-bottom: 5px;
}

.income p {
    color: var(--income-color);
    font-weight: 600;
}

.expense p {
    color: var(--expense-color);
    font-weight: 600;
}

.history {
    background-color: var(--card-color);
    padding: 20px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    animation: slideUp 0.5s ease 0.1s forwards;
    opacity: 0;
}

.history h3 {
    font-size: 1.2rem;
    margin-bottom: 15px;
}

.transactions {
    max-height: 300px;
    overflow-y: auto;
    padding-right: 10px;
}

.transaction {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
    margin-bottom: 10px;
    background-color: var(--bg-color);
    border-radius: 5px;
    position: relative;
    overflow: hidden;
    animation: fadeIn 0.3s ease;
}

.transaction::after {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 4px;
}

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

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

.transaction-name {
    flex: 1;
    margin-left: 10px;
}

.transaction-amount {
    font-weight: 600;
}

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

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

.transaction-category {
    font-size: 0.8rem;
    opacity: 0.7;
    margin-top: 3px;
}

.delete-btn {
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    opacity: 0.7;
    margin-left: 10px;
}

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

.add-transaction {
    background-color: var(--card-color);
    padding: 20px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    animation: slideUp 0.5s ease 0.2s forwards;
    opacity: 0;
}

.add-transaction h3 {
    font-size: 1.2rem;
    margin-bottom: 15px;
}

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

.form-control label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

.form-control input,
.form-control select {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    background-color: var(--bg-color);
    color: var(--text-color);
}

.radio-group {
    display: flex;
    gap: 15px;
    margin-top: 10px;
}

.radio-group label {
    display: flex;
    align-items: center;
    gap: 5px;
    cursor: pointer;
}

.btn {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 5px;
    background-color: var(--primary-color);
    color: white;
    font-weight: 600;
    cursor: pointer;
    margin-top: 10px;
}

.btn:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
}

.btn.secondary {
    background-color: var(--bg-color);
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

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

.charts {
    background-color: var(--card-color);
    padding: 20px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    grid-column: span 2;
    animation: slideUp 0.5s ease 0.3s forwards;
    opacity: 0;
}

.charts h3 {
    font-size: 1.2rem;
    margin-bottom: 15px;
}

#chart {
    margin-bottom: 20px;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

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