body {
    background: #0f172a;
    font-family: Arial;
    color: #fff;
}

.container {
    max-width: 800px;
    margin: 60px auto;
    background: #1e293b;
    padding: 30px;
    border-radius: 12px;
}

textarea {
    width: 100%;
    height: 300px;
    padding: 15px;
    border-radius: 8px;
    border: none;
    background: #334155;
    color: #fff;
    margin-bottom: 20px;
}

button {
    width: 100%;
    padding: 14px;
    background: linear-gradient(45deg,#3b82f6,#06b6d4);
    border: none;
    border-radius: 8px;
    font-weight: bold;
    cursor: pointer;
}

.loader {
    margin: 20px auto;
    border: 5px solid #334155;
    border-top: 5px solid #3b82f6;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}

.hidden { display: none; }

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

#result {
    margin-top: 20px;
}