/* Loading spinner overlay */
.files-loading-spinner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-20) var(--space-5);
    gap: var(--space-4);
    grid-column: 1 / -1;
}

.files-loading-spinner .spinner {
    width: 36px;
    height: 36px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

/* @keyframes spin → base/animations.css (canonical, loaded via main.css). */

.files-loading-spinner span {
    font-size: var(--text-base);
    color: var(--color-text-placeholder);
    font-weight: var(--weight-medium);
}

/* Full-area drop overlay. Hidden by default; shown over the content region
   (right of the sidebar) while files are dragged into the Files section
   (toggled in ui.js). Frosted backdrop + dashed border = a clear "drop here"
   affordance instead of a small inline box. */
.dropzone {
    position: fixed;
    top: var(--space-4);
    right: var(--space-4);
    bottom: var(--space-4);
    left: calc(var(--sidebar-width) + var(--space-4));
    z-index: var(--z-overlay);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    border: 3px dashed var(--color-border-medium);
    border-radius: var(--radius-3xl);
    background: var(--color-scrim-control);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    color: var(--color-text-secondary);
    font-size: var(--text-lg);
    font-weight: var(--weight-semibold);
    text-align: center;
}

/* Children don't catch pointer events, so moving over the icon/text doesn't
   fire dragleave on the overlay (avoids show/hide flicker). */
.dropzone > * {
    pointer-events: none;
}

.dropzone-icon {
    font-size: var(--text-6xl);
    color: var(--color-accent);
}

.dropzone.active {
    border-color: var(--color-accent);
    color: var(--color-accent-text);
}

@media (max-width: 768px) {
    .dropzone {
        left: var(--space-4);
    }
}

.upload-progress {
    margin-top: 15px;
    width: 100%;
    display: block;
}

.progress-bar {
    background-color: var(--color-bg-empty);
    height: 6px;
    border-radius: 3px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background-color: var(--color-accent);
    width: 0%;
    transition: width 0.3s;
}