/* ================================================================
   SessionManagerUI  — filesystem-session-manager.css
   Requires the CSS variable set defined in the host application.
   ================================================================ */

/* ── ROOT LAYOUT ─────────────────────────────────────────────── */

.fsm-root {
  display: flex;
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: var(--font-ui);
  font-size: 12px;
  color: var(--text-secondary);
  background: var(--bg-surface);
  position: relative;
}

.fsm-root.collapsed {
  display: none;
  height: 0;
  opacity: 0;
  pointer-events: none;
}


/* ── SIDEBAR ─────────────────────────────────────────────────── */

.fsm-sidebar {
  width: 216px;
  min-width: 160px;
  flex-shrink: 0;
  background: var(--bg-base);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.fsm-sidebar-hd {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 13px 12px 10px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.fsm-sidebar-label {
  font-size: 9.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.9px;
  color: var(--text-muted);
}

.fsm-ws-list {
  list-style: none;
  margin: 0;
  padding: 5px 0;
  overflow-y: auto;
  flex: 1;
  scrollbar-width: thin;
  scrollbar-color: rgba(80,80,80,.4) transparent;
}

.fsm-ws-list::-webkit-scrollbar { width: 4px; }
.fsm-ws-list::-webkit-scrollbar-thumb { background: rgba(80,80,80,.4); border-radius: 2px; }

.fsm-ws-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  cursor: pointer;
  transition: background var(--transition);
  position: relative;
  border-left: 2px solid transparent;
}

.fsm-ws-item:hover                { background: var(--bg-hover); }
.fsm-ws-item.active               { background: var(--bg-elevated); border-left-color: var(--accent-purple); }
.fsm-ws-item.active .fsm-ws-name  { color: var(--text-primary); }

.fsm-ws-icon  { color: var(--text-muted); flex-shrink: 0; display: flex; }
.fsm-ws-name  {
  flex: 1;
  font-size: 12px;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text-secondary);
}

.fsm-ws-badge {
  font-size: 9.5px;
  font-family: var(--font-mono);
  background: var(--bg-overlay);
  color: var(--text-muted);
  padding: 1px 5px;
  border-radius: 6px;
  border: 1px solid var(--border);
  flex-shrink: 0;
}

.fsm-ws-more {
  display: flex;
  align-items: center;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 2px;
  border-radius: var(--radius-sm);
  opacity: 0;
  transition: opacity var(--transition), color var(--transition);
  flex-shrink: 0;
}

.fsm-ws-item:hover .fsm-ws-more { opacity: 1; }
.fsm-ws-more:hover               { color: var(--text-primary); }

.fsm-ws-empty {
  padding: 24px 14px;
  font-size: 11px;
  color: var(--text-muted);
  text-align: center;
}

/* ── BODY ────────────────────────────────────────────────────── */

.fsm-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}

/* ── TOOLBAR ─────────────────────────────────────────────────── */

.fsm-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-elevated);
  flex-shrink: 0;
  gap: 12px;
}

/* Breadcrumb */

.fsm-breadcrumb {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
  min-width: 0;
  overflow: hidden;
}

.fsm-bc-item {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  padding: 3px 5px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: color var(--transition), background var(--transition);
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
}

.fsm-bc-item:hover          { color: var(--text-primary); background: var(--bg-hover); }
.fsm-bc-item.fsm-bc-current {
  color: var(--text-primary);
  font-weight: 600;
  cursor: default;
  pointer-events: none;
}

.fsm-bc-sep {
  color: var(--text-muted);
  opacity: 0.35;
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

/* Toolbar right */

.fsm-toolbar-right {
  display: flex;
  align-items: center;
  gap: 7px;
  flex-shrink: 0;
}

.fsm-divider {
  width: 1px;
  height: 18px;
  background: var(--border-mid);
  flex-shrink: 0;
}

.fsm-search-wrap {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-hover);
  border: 1px solid var(--border-mid);
  border-radius: var(--radius-sm);
  padding: 5px 9px;
  transition: border-color var(--transition);
}

.fsm-search-wrap:focus-within { border-color: var(--border-bright); }

.fsm-search-icon { color: var(--text-muted); display: flex; flex-shrink: 0; }

.fsm-search {
  background: none;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-size: 11px;
  font-family: var(--font-ui);
  width: 150px;
}

.fsm-search::placeholder { color: var(--text-muted); }

/* ── SHARED BUTTON PRIMITIVES ────────────────────────────────── */

.fsm-icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  background: none;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition);
  flex-shrink: 0;
}

.fsm-icon-btn:hover {
  background: var(--bg-hover);
  border-color: var(--border-mid);
  color: var(--text-primary);
}

.fsm-icon-btn.fsm-btn-danger:hover {
  color: var(--accent-red);
  border-color: rgba(233,86,116,.3);
  background: rgba(233,86,116,.07);
}

.fsm-text-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 10px;
  font-size: 11px;
  font-weight: 600;
  font-family: var(--font-ui);
  letter-spacing: 0.3px;
  border: 1px solid var(--border-mid);
  background: var(--bg-hover);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  flex-shrink: 0;
}

.fsm-text-btn:hover {
  background: var(--bg-overlay);
  border-color: var(--border-bright);
  color: var(--text-primary);
}

.fsm-text-btn.fsm-accent {
  background: var(--accent-grad);
  border-color: transparent;
  color: #fff;
}

.fsm-text-btn.fsm-accent:hover { opacity: 0.82; background: var(--accent-grad); }

/* Small "Open" pill inside rows */

.fsm-pill-btn {
  display: inline-flex;
  align-items: center;
  padding: 3px 9px;
  font-size: 10.5px;
  font-weight: 600;
  font-family: var(--font-ui);
  border: 1px solid var(--border-mid);
  background: var(--bg-hover);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.fsm-pill-btn.fsm-accent { background: var(--accent-grad); border-color: transparent; color: #fff; }
.fsm-pill-btn.fsm-accent:hover { opacity: 0.82; }

/* View toggle */

.fsm-view-toggle { display: flex; gap: 2px; }

.fsm-view-btn {
  width: 28px;
  height: 28px;
  background: none;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.fsm-view-btn:hover { color: var(--text-primary); background: var(--bg-hover); }
.fsm-view-btn.active {
  background: var(--bg-overlay);
  border-color: var(--border-mid);
  color: var(--text-primary);
}

/* ── CONTENT AREA ────────────────────────────────────────────── */

.fsm-content {
  flex: 1;
  overflow: auto;
  scrollbar-width: thin;
  scrollbar-color: rgba(80,80,80,.4) transparent;
}

.fsm-content::-webkit-scrollbar { width: 5px; }
.fsm-content::-webkit-scrollbar-thumb { background: rgba(80,80,80,.4); border-radius: 3px; }

/* ── TABLE — LIST VIEW ───────────────────────────────────────── */

.fsm-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}

.fsm-table thead {
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border-mid);
  position: sticky;
  top: 0;
  z-index: 5;
}

.fsm-table thead th {
  padding: 8px 14px;
  text-align: left;
  font-size: 9.5px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.7px;
  white-space: nowrap;
  user-select: none;
}

.fsm-th-icon { width: 38px; }
.fsm-th-date { width: 110px; }
.fsm-th-ver  { width: 130px; }
.fsm-th-act  { width: 160px; }

.fsm-row {
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background var(--transition);
}

.fsm-row:hover        { background: var(--bg-hover); }
.fsm-row.fsm-row-open { background: var(--bg-elevated); }
.fsm-row td           { padding: 9px 14px; vertical-align: middle; }

.fsm-cell-icon { display: table-cell; color: var(--text-muted); }
.fsm-row-folder  .fsm-cell-icon { color: #9B7A2E; }
.fsm-row-session .fsm-cell-icon { color: var(--accent-purple); }

.fsm-cell-name {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.fsm-name {
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.fsm-sub {
  font-size: 10px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  white-space: nowrap;
}

.fsm-muted { color: var(--text-muted); }

.fsm-ver-pill {
  font-size: 9px;
  font-family: var(--font-mono);
  background: rgba(158,83,228,.13);
  color: var(--accent-purple);
  border: 1px solid rgba(158,83,228,.28);
  padding: 1px 6px;
  border-radius: 2px;
  font-weight: 700;
  letter-spacing: 0.3px;
  white-space: nowrap;
  flex-shrink: 0;
}

.fsm-latest-tag {
  font-size: 9px;
  font-family: var(--font-mono);
  background: rgba(233,86,116,.1);
  color: var(--accent-red);
  border: 1px solid rgba(233,86,116,.22);
  padding: 1px 6px;
  border-radius: 2px;
  font-weight: 700;
  white-space: nowrap;
  flex-shrink: 0;
}

.fsm-cell-date {
  font-size: 11px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  white-space: nowrap;
}

.fsm-cell-ver { white-space: nowrap; }

.fsm-ver-toggle {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 11px;
  font-family: var(--font-mono);
  cursor: pointer;
  padding: 3px 5px;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}

.fsm-ver-toggle:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
}

.fsm-ver-toggle-arrow {
  display: inline-flex;
  transition: transform 0.2s ease;
  transform: rotate(0deg);
}

.fsm-ver-toggle-arrow.open { transform: rotate(90deg); }

.fsm-cell-act {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 3px;
  transition: opacity var(--transition);
}

/* Version sub-rows */

.fsm-ver-row {
  background: var(--bg-base);
  border-bottom: 1px solid var(--border);
}

.fsm-ver-row td { padding: 7px 14px 7px 48px; }

.fsm-ver-cell-name {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 11px;
}

.fsm-ver-cell-name svg { color: var(--text-muted); flex-shrink: 0; }

.fsm-ver-loading {
  color: var(--text-muted);
  font-size: 11px;
  display: flex !important;
  align-items: center;
  gap: 8px;
  padding: 10px 14px 10px 48px !important;
}

/* ── GRID VIEWS ──────────────────────────────────────────────── */

.fsm-grid {
  display: grid;
  padding: 14px 16px;
  gap: 10px;
  align-content: start;
}

.fsm-grid-sm { grid-template-columns: repeat(auto-fill, minmax(136px, 1fr)); }
.fsm-grid-lg { grid-template-columns: repeat(auto-fill, minmax(196px, 1fr)); }

.fsm-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px 14px 12px;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition),
              transform 0.15s ease, box-shadow 0.15s ease;
  display: flex;
  flex-direction: column;
  gap: 5px;
  position: relative;
  overflow: hidden;
}

.fsm-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-grad-soft);
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}

.fsm-card:hover {
  border-color: var(--border-bright);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.fsm-card:hover::before { opacity: 1; }

.fsm-card-icon {
  display: flex;
  align-items: center;
  margin-bottom: 4px;
  color: var(--text-muted);
}

.fsm-card-folder  .fsm-card-icon { color: #9B7A2E; }
.fsm-card-session .fsm-card-icon { color: var(--accent-purple); }

.fsm-card-name {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.fsm-card-meta {
  font-size: 10px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.fsm-card-versions {
  font-size: 10px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.fsm-card-act {
  display: flex;
  align-items: center;
  gap: 3px;
  transition: opacity var(--transition);
  margin-top: auto;
  padding-top: 8px;
  flex-wrap: wrap;
}

/* ── EMPTY & LOADING STATES ──────────────────────────────────── */

.fsm-loading,
.fsm-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
  text-align: center;
  gap: 10px;
}

.fsm-spinner {
  width: 22px;
  height: 22px;
  border: 2px solid var(--border-mid);
  border-top-color: var(--accent-purple);
  border-radius: 50%;
  animation: fsm-spin 0.7s linear infinite;
}

.fsm-spinner-xs {
  display: inline-block;
  width: 11px;
  height: 11px;
  border: 1.5px solid var(--border-mid);
  border-top-color: var(--accent-purple);
  border-radius: 50%;
  animation: fsm-spin 0.7s linear infinite;
  flex-shrink: 0;
}

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

.fsm-loading span  { font-size: 12px; color: var(--text-muted); }
.fsm-empty-icon    { color: var(--border-bright); margin-bottom: 2px; }
.fsm-empty-title   { font-size: 13px; font-weight: 600; color: var(--text-secondary); }
.fsm-empty-sub     { font-size: 11.5px; color: var(--text-muted); max-width: 300px; line-height: 1.6; }

.fsm-empty-actions {
  display: flex;
  gap: 8px;
  margin-top: 6px;
  flex-wrap: wrap;
  justify-content: center;
}

.fsm-search-banner {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 9px 16px;
  font-size: 11px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  background: var(--bg-elevated);
}

.fsm-search-banner svg    { color: var(--text-muted); flex-shrink: 0; }
.fsm-search-banner strong { color: var(--text-primary); font-weight: 600; }

/* ── CONTEXT MENU ────────────────────────────────────────────── */

.fsm-ctx {
  position: fixed;
  z-index: 9999;
  background: var(--bg-overlay);
  border: 1px solid var(--border-mid);
  border-radius: var(--radius-md);
  padding: 4px 0;
  min-width: 172px;
  box-shadow: var(--shadow-lg);
}

.fsm-ctx-item {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 7px 14px;
  font-size: 12px;
  cursor: pointer;
  color: var(--text-secondary);
  transition: background var(--transition), color var(--transition);
  user-select: none;
}

.fsm-ctx-item:hover        { background: var(--bg-hover); color: var(--text-primary); }
.fsm-ctx-item.danger       { color: var(--accent-red); }
.fsm-ctx-item.danger:hover { background: rgba(233,86,116,.1); }

.fsm-ctx-icon {
  color: var(--text-muted);
  display: flex;
  align-items: center;
  flex-shrink: 0;
  width: 16px;
  justify-content: center;
}

.fsm-ctx-divider { height: 1px; background: var(--border); margin: 4px 0; }