.ac-container {
    background: #f7fafd;
    border: 1px solid #cce;
    padding: 20px;
    border-radius: 16px;
    max-width: 420px;
    margin: 30px auto;
    font-family: "Segoe UI", sans-serif;
}

.ac-container h2 {
    text-align: center;
    color: #0073aa;
}

.ac-dropzone {
    border: 2px dashed #0073aa;
    border-radius: 14px;
    padding: 28px;
    text-align: center;
    cursor: pointer;
    background: #eef6fb;
    transition: 0.2s;
}

.ac-dropzone.dragover {
    background: #d9efff;
    border-color: #005f8d;
}

form {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-top: 16px;
}

select, button {
    padding: 12px;
    border-radius: 10px;
    font-size: 16px;
}

button {
    background: #0073aa;
    color: white;
    border: none;
    cursor: pointer;
}

.progress-container {
    width: 100%;
    background: #eee;
    border-radius: 10px;
    margin-top: 20px;
    height: 24px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    width: 0%;
    background: #0073aa;
    color: white;
    text-align: center;
    line-height: 24px;
}

.loader {
    margin: 20px auto;
    border: 6px solid #eee;
    border-top: 6px solid #0073aa;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}

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

.dl-btn {
    display: inline-block;
    margin-top: 10px;
    padding: 10px 16px;
    background: #28a745;
    color: white;
    border-radius: 8px;
    text-decoration: none;
}