* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
    transition: background-color 0.3s, color 0.3s;
}

body {
    background-color: #f0f2f5;
    color: #333;
}

body.dark-mode {
    background-color: #1a1a1a;
    color: #fff;
}

.container {
    max-width: 800px;
    margin: 2rem auto;
    padding: 1rem;
}

h1 {
    text-align: center;
    color: #1a1a1a;
    margin-bottom: 2rem;
}

.dark-mode h1 {
    color: #fff;
}

.search-box {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

input {
    flex: 1;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
    background-color: #fff;
    color: #333;
}

.dark-mode input {
    background-color: #333;
    color: #fff;
    border-color: #444;
}

button {
    padding: 0.8rem 1.5rem;
    background-color: #f7931a;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #e88a18;
}

.result-container {
    background-color: white;
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.dark-mode .result-container {
    background-color: #2d2d2d;
    box-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.balance-box, .info-box, .transactions {
    margin-bottom: 1.5rem;
    padding: 1rem;
    border: 1px solid #eee;
    border-radius: 4px;
}

.dark-mode .balance-box,
.dark-mode .info-box,
.dark-mode .transactions {
    border-color: #444;
}

h2 {
    color: #333;
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.dark-mode h2 {
    color: #fff;
}

.transaction-item {
    padding: 0.8rem;
    border-bottom: 1px solid #eee;
    display: flex;
    justify-content: space-between;
}

.dark-mode .transaction-item {
    border-bottom-color: #444;
}

.transaction-item:last-child {
    border-bottom: none;
}

.error {
    color: #dc3545;
    padding: 1rem;
    background-color: #f8d7da;
    border-radius: 4px;
    margin-top: 1rem;
}

.theme-switch {
    position: fixed;
    top: 1rem;
    right: 1rem;
    background-color: #f7931a;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
}

.dark-mode .theme-switch {
    background-color: #e88a18;
}