body {
    font-family: Arial, sans-serif;
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
    background-color: #f5f5f5;
}

#auth-form, #deal-form {
    background: white;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

input, button {
    width: 100%;
    padding: 10px;
    margin: 5px 0;
    box-sizing: border-box;
}

button {
    background-color: #4361ee;
    color: white;
    border: none;
    cursor: pointer;
    border-radius: 4px;
}

.deal-card {
    background: white;
    padding: 15px;
    margin: 10px 0;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}