body {
    font-family: Inter, system-ui, sans-serif;
    background: linear-gradient(135deg, #1d2671, #c33764);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}

.container {
    background: #111827;
    padding: 40px;
    border-radius: 16px;
    width: 600px;
    text-align: center;
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}

h1 {
    margin-bottom: 8px;
}

.upload-box {
    border: 2px dashed #4f46e5;
    border-radius: 12px;
    padding: 30px;
    margin: 20px 0;
    cursor: pointer;
    transition: 0.3s;
}

.upload-box:hover {
    background: rgba(79, 70, 229, 0.1);
}

.upload-box button {
    background: #4f46e5;
    color: white;
    border: none;
    padding: 10px 18px;
    border-radius: 8px;
    cursor: pointer;
}

.submit-btn {
    background: #22c55e;
    color: black;
    border: none;
    padding: 12px 22px;
    font-size: 16px;
    border-radius: 10px;
    cursor: pointer;
}

#progress {
    margin-top: 20px;
}

.loader {
    width: 40px;
    height: 40px;
    border: 4px solid #555;
    border-top: 4px solid #22c55e;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: auto;
}

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

pre {
    text-align: left;
    background: #020617;
    padding: 15px;
    border-radius: 8px;
    max-height: 300px;
    overflow: auto;
    margin-top: 20px;
}

.hidden {
    display: none;
}