:root {
    --dz-bg: #0f1724; /* dark base */
    --dz-panel: linear-gradient(135deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
    --dz-accent1: #6ee7b7; /* mint */
    --dz-accent2: #60a5fa; /* sky */
    --dz-border: rgba(255,255,255,0.06);
    --dz-radius: 12px;
    --dz-padding: 18px;
    --dz-transition: 240ms cubic-bezier(.2,.9,.3,1);
    --dz-shadow: 0 6px 18px rgba(2,6,23,0.6);
}
.dropzone {
    align-items: center;
    background-color: #f8f9fa; /* light gray background */
    border: 1px solid #dee2e6; /* subtle gray border */
    color: #6c757d; /* muted text */
    padding: 1rem;
    border-radius: 8px; /* optional for smoother edges */
    box-shadow: var(--dz-shadow);
    border-radius: 6px;
    padding: 20px;
    cursor: pointer;
    transition: background-color 0.2s, border-color 0.2s;
    /*    transition: transform var(--dz-transition), box-shadow var(--dz-transition), border-color var(--dz-transition);*/
    width: 100%;
    max-width: 820px;
}
/*.dropzone {
    border: 2px solid var(--dz-border);
    cursor: pointer;
    background-color: var(--dz-panel);
    border-radius: 10px;
    padding: 10px;
    text-align: center;
    color: #555;
    max-width: 400px;
    transition: background-color 0.3s ease;
}*/
.dropzone.dragover {
    border-color: #007bff;
    background-color: aliceblue
}
    .dropzone.error {
        background-color: #f8d7da;
        border-color: #dc3545;
    }

.file-item {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
}

    .file-item img {
        max-width: 50px;
        margin-right: 10px;
    }

    .file-item button {
        margin-left: auto;
    }

#fileTable td {
    vertical-align: middle;
}

.dropzone-title {
    display: block;
    font-size: 15px;
    font-weight: 500;
    line-height: 1.1;
    color: #6c757d; /* muted text */
    margin-bottom: 2px;
}

.dropzone-sub {
    display: block;
    font-size: 14px;
    font-weight: 400;
    color: #6c757d; /* muted text */
}

/* states */
.dropzone:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(2,6,23,0.7);
}

.dropzone:focus {
    box-shadow: 0 10px 28px rgba(12,32,64,0.6);
    border-color: rgba(96,165,250,0.35);
}

.dropzone-over {
    border-color: rgba(96,165,250,0.9);
    transform: scale(1.01);
}

    .dropzone-over::before {
        opacity: 1;
    }