body {
    font-family: Arial, sans-serif;
    background-color: #0d1117;
    padding: 20px;
}

.container {
    max-width: 600px;
    margin: auto;
    background: #161b22;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.8);
}

h1 {
    text-align: center;
    color: #f0f6fc;
}

input[type="text"] {
    width: calc(100% - 20px);
    padding: 10px;
    margin: 10px 0;
    border: 1px solid #30363d;
    border-radius: 4px;
    background-color: #0d1117;
    color: #c9d1d9;
    transition: border-color 0.3s, box-shadow 0.3s;
}

input[type="text"]:focus {
    outline: none;
    border-color: #58a6ff;
    box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.3);
}

button {
    width: 100%;
    padding: 10px;
    background-color: #238636;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.2s, box-shadow 0.2s;
}

button:hover {
    background-color: #2ea043;
    box-shadow: 0 0 20px rgba(35, 134, 54, 0.3);
}

.results {
    margin-top: 20px;
}

/* Style cho ô kết quả (readonly) */
input[readonly] {
    background-color: #0d1117;
    color: #c9d1d9;
}