:root {
    --primary-color: #926bff;
    --secondary-color: #FFB6C1;
    --text-color: #333;
    --background-color: #F8F9FA;
    --expense-color: #FF6B6B;
    --repayment-color: #4CAF50;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

.app-container {
    max-width: 600px;
    margin: 0 auto;
    padding: 1rem;
}

header {
    text-align: center;
    padding: 1rem 0;
    margin-bottom: 2rem;
}

h1 {
    color: var(--primary-color);
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
}

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

.quick-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.action-btn {
    flex: 1;
    padding: 1rem;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    color: white;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    transition: transform 0.2s;
}

.action-btn:active {
    transform: scale(0.98);
}

.action-btn.expense {
    background-color: var(--expense-color);
}

.action-btn.repayment {
    background-color: var(--repayment-color);
}

.action-btn .icon {
    font-size: 1.5rem;
}

.transactions-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1rem;
}

.transaction-item {
    background: white;
    padding: 1.2rem;
    border-radius: 16px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: transform 0.2s, box-shadow 0.2s;
    position: relative;
    overflow: hidden;
    border-left: 4px solid transparent;
}

.transaction-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.transaction-item.expense {
    border-left-color: var(--expense-color);
    background: linear-gradient(to right, rgba(255, 107, 107, 0.05), white);
}

.transaction-item.repayment {
    border-left-color: var(--repayment-color);
    background: linear-gradient(to right, rgba(76, 175, 80, 0.05), white);
}

.transaction-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.transaction-amount {
    font-weight: 600;
    font-size: 1.3rem;
    color: var(--text-color);
}

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

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

.transaction-description {
    font-size: 0.95rem;
    color: #666;
    margin-top: 0.2rem;
}

.transaction-date {
    font-size: 0.85rem;
    color: #999;
    margin-top: 0.2rem;
}

.delete-btn {
    background: none;
    border: none;
    color: #999;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: all 0.2s;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.delete-btn:hover {
    background-color: rgba(0,0,0,0.05);
    color: #ff4444;
}

.transaction-type-indicator {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    font-size: 0.8rem;
    padding: 0.2rem 0.5rem;
    border-radius: 12px;
    font-weight: 500;
}

.transaction-item.expense .transaction-type-indicator {
    background-color: rgba(255, 107, 107, 0.1);
    color: var(--expense-color);
}

.transaction-item.repayment .transaction-type-indicator {
    background-color: rgba(76, 175, 80, 0.1);
    color: var(--repayment-color);
}

@media (max-width: 480px) {
    .app-container {
        padding: 0.5rem;
    }

    .quick-actions {
        flex-direction: column;
    }

    .action-btn {
        flex-direction: row;
        justify-content: center;
    }

    .transaction-item {
        padding: 1rem;
    }

    .transaction-amount {
        font-size: 1.2rem;
    }

    .transaction-description {
        font-size: 0.9rem;
    }

    .transaction-date {
        font-size: 0.8rem;
    }
}

.quick-amounts {
    margin-bottom: 1.5rem;
}

.quick-amounts h3 {
    font-size: 1rem;
    color: #666;
    margin-bottom: 0.8rem;
}

.quick-amounts-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
}

.quick-amount-btn {
    padding: 0.5rem;
    border: 1px solid var(--primary-color);
    border-radius: 8px;
    background: white;
    color: var(--primary-color);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

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

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

.quick-amounts-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.8rem;
}

.customize-btn {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: background-color 0.2s;
}

.customize-btn:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

.customize-amounts-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.customize-amount-input {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.customize-amount-input label {
    font-size: 0.9rem;
    color: #666;
}

.customize-amount-input input {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
}

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

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    width: 90%;
    max-width: 400px;
}

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

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

input {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
}

.form-buttons {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.form-buttons button {
    flex: 1;
    padding: 0.8rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.2s;
}

#cancel-btn {
    background-color: #ddd;
    color: #666;
}

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