body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #2c3e50;
    color: #ecf0f1;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.container {
    background-color: #34495e;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    width: 350px;
    text-align: center;
}

h1 {
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.input-group {
    margin-bottom: 1rem;
    text-align: left;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

input {
    width: 100%;
    padding: 0.5rem;
    border-radius: 4px;
    border: 1px solid #7f8c8d;
    background-color: #ecf0f1;
    color: #2c3e50;
    box-sizing: border-box;
}

button {
    width: 100%;
    padding: 0.75rem;
    margin-top: 1rem;
    border: none;
    border-radius: 4px;
    background-color: #27ae60;
    color: white;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #2ecc71;
}

button:disabled {
    background-color: #95a5a6;
    cursor: not-allowed;
}

#result {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid #7f8c8d;
}

#equityValue {
    font-weight: bold;
    font-size: 1.2rem;
    color: #f1c40f;
}

#status {
    font-size: 0.8rem;
    color: #bdc3c7;
    margin-top: 0.5rem;
}