* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial', sans-serif;
    background-color: #f5f5f5;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    width: 90%;
    max-width: 600px;
    background-color: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}

.logo-container {
    text-align: center;
    margin-bottom: 2rem;
}

.logo {
    width: 120px;
    height: auto;
    margin-bottom: 1rem;
}

h1 {
    color: #333;
    font-size: 1.8rem;
    margin-bottom: 2rem;
}

.converter-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

label {
    color: #555;
    font-weight: 600;
}

input {
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

input:focus {
    outline: none;
    border-color: #007bff;
}

.submit-btn {
    background-color: #007bff;
    color: white;
    padding: 1rem;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s;
}

.submit-btn:hover {
    background-color: #0056b3;
}

@media (max-width: 480px) {
    .container {
        padding: 1rem;
    }
    
    h1 {
        font-size: 1.5rem;
    }
    
    .logo {
        width: 100px;
    }
}
/* Add these at the end of your existing CSS */
#error-message,
#success-message {
    margin: 10px 0;
    padding: 10px;
    border-radius: 5px;
    text-align: center;
}

#error-message {
    background-color: #ffe6e6;
    color: #d63031;
}

#success-message {
    background-color: #e6ffe6;
    color: #00b894;
}

.submit-btn:disabled {
    background-color: #cccccc;
    cursor: not-allowed;
}