body {
    font-family: Arial, Helvetica, sans-serif;
    background: #0f172a;
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.container {
    background: #020617;
    padding: 40px;
    width: 520px;
    border-radius: 12px;
    box-shadow: 0 0 40px rgba(0,0,0,0.6);
}

h1 {
    text-align: center;
    margin-bottom: 10px;
}

input[type="file"] {
    width: 100%;
    margin: 20px 0;
}

button {
    width: 100%;
    padding: 12px;
    background: #2563eb;
    color: white;
    border: none;
    font-size: 16px;
    border-radius: 8px;
    cursor: pointer;
}

button:hover {
    background: #1d4ed8;
}

.loading {
    margin-top: 20px;
    text-align: center;
    color: #facc15;
}

.hidden {
    display: none;
}

#result {
    margin-top: 25px;
}

#keywords span {
    background: #1e293b;
    padding: 6px 10px;
    border-radius: 6px;
    margin: 5px;
    display: inline-block;
}

#sentiment {
    padding: 6px 12px;
    border-radius: 8px;
    font-weight: bold;
}

.Positive {
    background: #16a34a;
}

.Negative {
    background: #dc2626;
}

.Neutral {
    background: #64748b;
}