/* Sidebar: FCS file drop zone, channel-select controls, and status text. */

.sidebar {
  position: relative;
}

.sidebar-header {
  margin-bottom: 16px;
  transition: margin 120ms ease;
}

.sidebar-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  min-height: var(--panel-title-row-height);
  margin-bottom: 8px;
}

.sidebar-title-row h2 {
  margin: 0;
  line-height: 1.2;
}

.sidebar-content {
  display: flex;
  min-width: 0;
  flex: 1;
  min-height: 0;
  flex-direction: column;
  gap: 16px;
  transition:
    opacity 120ms ease,
    visibility 120ms ease;
}

.sidebar-section {
  min-width: 0;
}

.sidebar-section + .sidebar-section {
  border-top: 1px solid var(--border);
  padding-top: 16px;
}

.sidebar-toggle {
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  width: 42px;
  min-height: 42px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 6px 14px var(--shadow-soft);
  color: var(--text);
  padding: 0;
}

.sidebar-toggle:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
}

.sidebar-toggle:focus-visible {
  outline: 3px solid var(--focus-success);
  outline-offset: 2px;
}

.sidebar-toggle-icon {
  display: block;
  width: 26px;
  height: 26px;
}

.app.sidebar-collapsed .sidebar {
  align-items: center;
  padding: 2px 8px;
}

.app.sidebar-collapsed .sidebar-header {
  width: 100%;
  margin-bottom: 0;
}

.app.sidebar-collapsed .sidebar-title-row {
  justify-content: center;
  min-height: var(--panel-title-row-height);
  margin-bottom: 8px;
}

.app.sidebar-collapsed .sidebar-title-row h2 {
  display: none;
}

.app.sidebar-collapsed .sidebar-header .panel-title-rule {
  width: 100%;
}

.app.sidebar-collapsed .sidebar-content {
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
}

.drop-zone {
  cursor: pointer;
  display: grid;
  place-items: center;
  min-height: 168px;
  border: 1px dashed var(--dropzone-border);
  border-radius: 8px;
  padding: 18px;
  text-align: center;
  background: var(--panel);
  transition:
    border-color 120ms ease,
    background 120ms ease;
}

.drop-zone.dragging {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.drop-zone strong,
.drop-zone span {
  display: block;
}

.drop-zone span {
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.92rem;
}

.controls {
  display: grid;
  gap: 12px;
}

.status {
  min-height: 42px;
  margin: 0;
  color: var(--muted);
  line-height: 1.45;
}

.status.error {
  color: var(--danger);
}