/* ── Collaborations View ── */
.collab-container {
    display: flex;
    height: calc(100vh - 45px);
    overflow: hidden;
}
.collab-col {
    overflow-y: auto;
    padding: 16px;
}
.collab-col-groups {
    width: 250px;
    flex-shrink: 0;
    border-right: 1px solid var(--border-color);
    background: var(--bg-white);
}
.collab-col-preview {
    width: 250px;
    flex-shrink: 0;
    border-right: 1px solid var(--border-color);
    background: var(--bg-color);
}
.collab-col-shared {
    flex: 1;
    min-width: 0;
    padding: 0;
    background: var(--bg-white);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Empty states */
.collab-preview-empty, .collab-shared-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-light);
    text-align: center;
    gap: 12px;
    font-size: 0.9em;
}

/* Buttons */
.collab-create-btn {
    width: 100%;
    padding: 10px;
    background: var(--link-color);
    color: white;
    border: none;
    border-radius: 6px;
    font-family: var(--font-main);
    font-size: 0.85em;
    font-weight: 500;
    cursor: pointer;
    margin-bottom: 12px;
}
.collab-create-btn:hover { opacity: 0.9; }

.collab-btn {
    padding: 6px 14px;
    border: none;
    border-radius: 5px;
    font-family: var(--font-main);
    font-size: 0.8em;
    cursor: pointer;
    white-space: nowrap;
}
.collab-btn-primary { background: var(--primary-color); color: white; }
.collab-btn-primary:hover { opacity: 0.9; }
.collab-btn-secondary { background: var(--border-color); color: var(--text-color); }
.collab-btn-secondary:hover { background: var(--border-color); }
.collab-btn-danger { background: var(--danger-color); color: white; }
.collab-btn-danger:hover { opacity: 0.9; }
.collab-btn-sm { padding: 4px 10px; font-size: 0.75em; }

.collab-input {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-family: var(--font-main);
    font-size: 0.85em;
    background: var(--bg-white);
    box-sizing: border-box;
}
.collab-input:focus { outline: none; border-color: var(--primary-color); }

/* Group sections */
.collab-section-heading {
    font-size: 0.75em;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin: 16px 0 6px;
    padding-bottom: 4px;
    border-bottom: 1px solid var(--border-color);
}
.collab-group-list { list-style: none; padding: 0; margin: 0; }
.collab-group-empty {
    font-size: 0.8em;
    color: var(--text-light);
    padding: 8px 4px;
}

/* Group items */
.collab-group-item {
    border-radius: 6px;
    margin-bottom: 4px;
    padding-top: 6px;
    padding-bottom: 4px;
    transition: background 0.15s;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
}
.collab-group-item.active { background: var(--bg-color); }
.collab-group-item-main {
    display: flex;
    align-items: flex-start;
    padding: 0px 6px;
    cursor: pointer;
    border-radius: 6px;
    gap: 6px;
}
.collab-group-item-main:hover { background: var(--bg-color); }
.collab-group-chevron { transition: transform 0.2s; flex-shrink: 0; margin-top: 4px; }
.collab-group-chevron.collapsed { transform: rotate(-90deg); }
.collab-group-name-wrap {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
}
.collab-group-name {
    font-size: 0.85em;
    font-weight: 500;
    color: var(--text-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    border-radius: 3px;
    padding: 1px 3px;
}
.collab-sharing-status {
    font-size: 0.72em;
    color: var(--primary-color);
    padding: 0 3px;
    text-decoration: none;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.collab-sharing-status:hover {
    text-decoration: underline;
}
.collab-sharing-none {
    color: var(--danger-color);
    font-style: italic;
}
.collab-group-name[contenteditable="true"] {
    outline: none;
    background: var(--bg-white);
    cursor: text;
    white-space: nowrap;
    overflow: visible;
    box-shadow: 0 0 0 1px var(--primary-color);
}
.collab-group-actions {
    display: flex;
    align-items: center;
    gap: 2px;
    flex-shrink: 0;
    opacity: 1;
    margin-top: 2px;
}
.collab-group-action-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 3px;
    display: flex;
    align-items: center;
    border-radius: 3px;
}
.collab-group-action-btn:hover { color: var(--text-color); background: var(--border-color); }
.collab-group-delete-btn:hover { color: var(--danger-color); }
.collab-group-leave-btn:hover { color: var(--danger-color); }
.collab-group-meta {
    font-size: 0.7em;
    color: var(--text-muted);
    flex-shrink: 0;
}

/* Email invite input under owned groups */
.collab-email-invite-row {
    padding: 0 10px 4px;
}
.collab-email-invite-input {
    width: 100%;
    padding: 4px 8px !important;
    font-size: 0.75em !important;
    border: 1px solid var(--border-color) !important;
    background: var(--bg-white) !important;
    margin: 4px 0px;
}
.collab-email-invite-input:focus { border-color: var(--primary-color) !important; }

/* Pending invite styling */
.collab-member-preview-item.pending { opacity: 0.7; }
.collab-avatar-pending {
    background: var(--text-light) !important;
    color: white;
}
.collab-pending-name {
    font-style: italic;
}
.collab-pending-icon {
    color: var(--text-light);
    flex-shrink: 0;
    margin-right: 2px;
}

/* Members preview in group list */
.collab-group-members-preview {
    list-style: none;
    padding: 0 0 4px 6px;
    margin: 0;
}
.collab-member-preview-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 2px 6px;
    font-size: 0.75em;
    color: var(--text-muted);
    border-radius: 4px;
}
.collab-member-preview-item:hover { background: var(--bg-color); color: var(--text-color); }
.collab-member-preview-item.active { background: var(--border-color); color: var(--text-color); font-weight: 600; }
.collab-member-preview-main {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    flex: 1;
    min-width: 0;
}
.collab-member-avatar {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--bg-notepad-header);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7em;
    font-weight: 600;
    flex-shrink: 0;
}
.collab-member-name-small {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.collab-member-name-small em { font-style: italic; opacity: 0.7; }
.collab-member-preview-item.is-me .collab-member-avatar { background: var(--primary-color); }
.collab-remove-member-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    border: none;
    background: none;
    border-radius: 4px;
    cursor: pointer;
    color: var(--text-muted);
    padding: 0;
    flex-shrink: 0;
    visibility: hidden;
}
.collab-remove-member-btn:hover { color: var(--danger-color); background: var(--border-color); }
.collab-member-preview-item:hover .collab-remove-member-btn { visibility: visible; }

/* Detail meta (reused) */
.collab-detail-meta {
    font-size: 0.8em;
    color: var(--text-muted);
}

/* Checkbox labels */
.collab-checkbox-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.82em;
    color: var(--text-color);
    padding: 4px 0;
    cursor: pointer;
}
.collab-checkbox-label input[type="checkbox"] {
    accent-color: var(--primary-color);
    width: 16px;
    min-width: 16px;
    height: 16px;
    margin: 0;
}
.collab-picker-label {
    font-size: 0.8em;
    color: var(--text-muted);
    margin: 6px 0 4px;
}
.collab-project-list {
    max-height: 200px;
    overflow-y: auto;
    padding-left: 8px;
}

/* Experiment preview */
.collab-exp-preview {
    display: none;
    flex-direction: column;
    height: 100%;
    overflow-y: hidden;
    overflow-x: auto;
}
.collab-exp-preview .shared-page-header {
    flex-shrink: 0;
    min-width: calc(40 * 20px);
}
.collab-exp-canvas {
    flex: 1;
    position: relative;
    min-width: calc(40 * 20px);
    overflow-y: auto;
    overflow-x: hidden;
    background: var(--bg-white);
    background-image:
        linear-gradient(to right, var(--grid-color, rgba(0,0,0,0.12)) 1px, transparent 1px),
        linear-gradient(to bottom, var(--grid-color, rgba(0,0,0,0.12)) 1px, transparent 1px);
    background-size: 20px 20px;
    scrollbar-width: none;
}
.collab-exp-canvas::-webkit-scrollbar { display: none; }
.collab-exp-canvas .card { cursor: default; }
.collab-exp-canvas .delete-btn,
.collab-exp-canvas .resize-handle,
.collab-exp-canvas .text-toolbar,
.collab-exp-canvas .text-drag-handle { display: none; }
.collab-exp-canvas .text-editor { cursor: default; }

/* Right column: shared content tree */
.collab-shared-heading {
    font-size: 0.95em;
    font-weight: 600;
    color: var(--text-color);
    margin: 0 0 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
}
.collab-shared-tree { padding: 0; }
/* Collab tree reuses .project-item / .sidebar-exp-item styles from notebook sidebar */

.collab-no-content {
    font-size: 0.82em;
    color: var(--text-light);
    text-align: center;
    padding: 20px 0;
}
.collab-loading {
    font-size: 0.85em;
    color: var(--text-muted);
    text-align: center;
    padding: 20px 0;
}

/* Join modal */
.collab-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}
.collab-modal {
    background: var(--bg-white);
    border-radius: 10px;
    max-width: 440px;
    width: 90%;
    box-shadow: 0 8px 30px var(--shadow-color);
    overflow: hidden;
}
.collab-join-options {
    margin: 12px 0 16px;
    padding: 12px;
    background: var(--bg-color);
    border-radius: 6px;
}
/* collab-modal-actions: now using shared .modal-actions from notebook.css */

/* Sharing preferences modal */
.collab-sharing-options {
    margin: 0 0 16px;
    padding: 14px;
    background: var(--bg-color);
    border-radius: 6px;
}
.collab-sharing-divider {
    height: 1px;
    background: var(--border-color);
    margin: 10px 0;
}
.collab-sharing-section-label {
    font-size: 0.82em;
    font-weight: 500;
    color: var(--text-color);
    margin: 0 0 8px;
}
.collab-modal-project-tree {
    max-height: 280px;
    overflow-y: auto;
}
.collab-modal-project-items {
    padding-left: 4px;
    transition: opacity 0.15s;
}
.collab-share-all-label {
    margin-bottom: 6px;
}
.collab-project-tree-item {
    padding-left: 8px;
}
.collab-project-tree-item svg {
    flex-shrink: 0;
}

/* ── Profile Modal ── */