/* ============================================================
   Lumino Design System — Fullscreen Shell styles
   ============================================================ */

/* Embedded state — subtle expand button anchored top-right of studio */
.fs-embedded { position: relative; }

/* Stage-mount: ONE persistent wrapper that holds children across embed/expand
   (prevents React from unmounting + wiping child state). */
.fs-stage-mount.embedded { position: relative; }
.fs-stage-mount.expanded {
  position: fixed;
  inset: 56px 0 0 0;  /* leave room for fs-overlay-chrome toolbar at top */
  z-index: 9998;
  background: var(--color-surface-base);
  overflow: auto;
  animation: fs-fade-in 200ms ease;
}
.fs-overlay-chrome {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 9999;
  background: var(--color-surface-panel);
  animation: fs-fade-in 200ms ease;
}
.fs-overlay-chrome .fs-toolbar { border-bottom: 1px solid var(--color-border-hairline); }
.fs-expand-btn-floating { /* same as .fs-expand-btn but in global coords when children are siblings */ }
.fs-expand-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 5;
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 10px;
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border-hairline);
  border-radius: var(--radius-pill);
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 140ms, color 140ms, border-color 140ms;
}
.fs-expand-btn:hover {
  background: var(--color-accent-faint);
  border-color: var(--color-accent-glow);
  color: var(--color-accent-deep, var(--color-accent));
}
.fs-expand-btn svg { opacity: 0.8; }

/* Fullscreen overlay */
.fs-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  background: var(--color-surface-base);
  animation: fs-fade-in 200ms ease;
}
@keyframes fs-fade-in {
  from { opacity: 0; transform: scale(0.985); }
  to   { opacity: 1; transform: scale(1); }
}

.fs-toolbar {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 12px 20px;
  background: var(--color-surface-panel);
  border-bottom: 1px solid var(--color-border-hairline);
  min-height: 56px;
}
.fs-toolbar-left { display: flex; align-items: baseline; gap: 10px; min-width: 0; }
.fs-toolbar-title {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--color-text-primary);
  white-space: nowrap;
}
.fs-toolbar-sub {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-tertiary);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.fs-toolbar-right { display: flex; align-items: center; gap: 8px; }

/* Buttons inside toolbar */
.fs-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 12px;
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border-hairline);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font: inherit;
  font-size: 12px;
  cursor: pointer;
  transition: background 140ms, border-color 140ms, color 140ms;
}
.fs-btn:hover { background: var(--color-surface-active); color: var(--color-text-primary); }
.fs-btn-primary {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-accent-ink);
  font-weight: 500;
}
.fs-btn-primary:hover {
  background: var(--color-accent);
  filter: brightness(1.06);
  color: var(--color-accent-ink);
}
.fs-kbd {
  padding: 2px 6px;
  background: var(--color-surface-base);
  border: 1px solid var(--color-border-hairline);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--color-text-tertiary);
  margin-left: 2px;
}

/* Stage — the area where children render */
.fs-stage {
  flex: 1 1 auto;
  min-height: 0;
  overflow: auto;
  position: relative;
}

/* Save menu */
.fs-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  min-width: 280px;
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border-hairline);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 6px;
  z-index: 10;
  animation: fs-menu-in 160ms ease;
}
@keyframes fs-menu-in {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}
.fs-menu-section { padding: 6px; }
.fs-menu-section + .fs-menu-section { border-top: 1px solid var(--color-border-hairline); margin-top: 2px; padding-top: 8px; }
.fs-menu-label {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin-bottom: 6px;
  padding: 0 4px;
}
.fs-menu-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  padding: 8px 10px;
  background: transparent;
  border: none;
  border-radius: var(--radius-default);
  color: var(--color-text-primary);
  font: inherit;
  font-size: 13px;
  text-align: left;
  cursor: pointer;
  transition: background 120ms;
}
.fs-menu-item:hover { background: var(--color-surface-active); }
.fs-menu-sub {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--color-text-tertiary);
  letter-spacing: 0.05em;
}
.fs-menu-folder {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 8px 10px;
  background: var(--color-accent-faint);
  border: 1px solid var(--color-accent-glow);
  border-radius: var(--radius-default);
  color: var(--color-accent-deep, var(--color-accent));
  font-size: 12px;
}
.fs-menu-folder-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-family: var(--font-mono);
}
.fs-menu-link {
  background: transparent;
  border: none;
  color: var(--color-text-tertiary);
  font: inherit;
  font-size: 11px;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 2px;
  padding: 2px 4px;
}
.fs-menu-link:hover { color: var(--color-text-primary); }
.fs-menu-hint {
  padding: 10px 10px 4px;
  font-size: 11px;
  line-height: 1.45;
  color: var(--color-text-tertiary);
}

/* Toast */
.fs-toast {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  padding: 8px 12px;
  background: var(--color-surface-panel);
  border: 1px solid var(--color-border-hairline);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-secondary);
  box-shadow: var(--shadow-md);
  white-space: nowrap;
  z-index: 11;
  animation: fs-menu-in 160ms ease;
}