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

body {
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(135deg, #2c3e50, #34495e);
    color: #ecf0f1;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    background-color: rgba(0, 0, 0, 0.7);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    max-width: 600px;
    width: 100%;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: #ecf0f1;
}

h2 {
    font-size: 1.5rem;
    color: #1abc9c;
    margin-top: 30px;
}

.form-container {
    width: 100%;
}

.form-group {
    margin-bottom: 20px;
    text-align: left;
}

label {
    font-weight: 500;
    color: #ecf0f1;
}

input[type="text"] {
    width: 100%;
    padding: 12px;
    margin-top: 8px;
    border: 1px solid #bdc3c7;
    border-radius: 5px;
    font-size: 1rem;
    transition: border 0.3s ease;
}

input[type="text"]:focus {
    border-color: #1abc9c;
    outline: none;
}

button {
    background-color: #1abc9c;
    color: white;
    border: none;
    padding: 12px 25px;
    font-size: 1rem;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    margin: 5px;
}

button:hover {
    background-color: #16a085;
}

.result-container {
    margin-top: 30px;
    background-color: #34495e;
    padding: 20px;
    border-radius: 5px;
    width: 100%;
}

span {
    color: #2980b9;
    font-weight: bold;
}

.actions {
    margin-top: 20px;
}

.error-message {
    color: #e74c3c;
    font-size: 1rem;
    margin-top: 20px;
}

button:disabled {
    background-color: #bdc3c7;
    cursor: not-allowed;
}