/* ── Combined navigation rail (devices ↔ experiments) ──────────────────── */

.navrail {
  width: 218px;
  flex-shrink: 0;
  background: var(--bg-soft);
  border-right: 1px solid var(--line);
  box-shadow: 1px 0 0 rgba(30, 40, 60, 0.02), var(--inset-hi-lt);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
  z-index: 1;
}
.navrail.hidden { display: none; }

.navrail-view {
  flex: 1; min-height: 0;
  display: flex; flex-direction: column;
  overflow: hidden;
}
.navrail-view.hidden { display: none; }

.navrail-head {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  background: var(--panel-alt);
  display: flex; align-items: center; gap: 9px;
}
.navrail-head-back { padding-left: 8px; }

.navrail-eyebrow {
  font-family: var(--font-display);
  font-size: 0.58rem; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--dim);
  flex-shrink: 0;
}
.navrail-title {
  display: flex; flex-direction: row; align-items: baseline; gap: 8px;
  min-width: 0; flex: 1;
}
.navrail-subtitle {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ink-strong);
  letter-spacing: -0.01em;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}
.navrail-back {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  cursor: pointer;
  padding: 3px 9px 4px;
  font-size: 0.9rem;
  line-height: 1;
  color: var(--mid);
  font-family: inherit;
  box-shadow: var(--inset-hi-lt), var(--shadow-xs);
  transition: all var(--t-fast) var(--ease);
  flex-shrink: 0;
}
.navrail-back:active { box-shadow: none; transform: translateY(0.5px); }
.navrail-back:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent-strong);
}

.navrail-body {
  flex: 1; min-height: 0;
  overflow-y: auto;
  padding: 10px 8px;
}

/* Footer actions inside experiments view */
.navrail-actions {
  margin-top: auto;
  padding: 10px 10px 12px;
  border-top: 1px solid var(--line-soft);
  background: var(--panel-alt);
  display: flex; flex-direction: column; gap: 3px;
  flex-shrink: 0;
}
.sidebar-action-btn {
  padding: 7px 10px;
  font-size: 0.74rem;
  font-weight: 500;
  background: transparent;
  color: var(--mid);
  border: 1px solid transparent;
  border-radius: var(--r-md);
  cursor: pointer;
  text-align: left;
  text-decoration: none;
  font-family: inherit;
  display: block;
  transition: all var(--t-fast) var(--ease);
}
.sidebar-action-btn:hover {
  background: var(--accent-soft);
  color: var(--accent-strong);
  border-color: var(--accent);
}
.sidebar-action-btn:disabled { opacity: 0.5; cursor: default; }

/* ── Device list (rendered into .navrail-body via #deviceList) ────────── */

.device-group-toggle {
  display: flex; align-items: center; gap: 7px;
  width: 100%;
  background: none; border: none;
  font-family: var(--font-display);
  cursor: pointer;
  margin-bottom: 6px;
  padding: 3px 4px;
  color: var(--ink);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border-radius: var(--r-sm);
  transition: color var(--t-fast) var(--ease);
}
.device-group-toggle:hover { color: var(--accent); }
.device-group-caret {
  display: inline-block;
  font-size: 0.65rem;
  color: var(--dim);
  transition: transform 0.15s var(--ease);
}
.device-group.collapsed .device-group-caret { transform: rotate(-90deg); }
.device-group.collapsed .device-group-body  { display: none; }
.device-group-name  { flex: 1; text-align: left; }
.device-group-count {
  color: var(--faint);
  font-weight: 500;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0;
}

.sidebar-label {
  font-family: var(--font-display);
  font-size: 0.62rem; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 6px; padding: 2px 4px;
}

.device-group { margin-bottom: 14px; }
.device-group:last-child { margin-bottom: 0; }

.device-card {
  position: relative;
  padding: 6px 10px 6px 12px;
  border-radius: var(--r-md);
  cursor: pointer;
  margin-bottom: 1px;
  border: 1px solid transparent;
  white-space: nowrap;
  display: flex; align-items: center; gap: 6px;
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.device-card::before {
  content: '';
  position: absolute;
  left: 0; top: 7px; bottom: 7px;
  width: 2px;
  background: transparent;
  border-radius: 0 2px 2px 0;
  transition: background var(--t-fast) var(--ease);
}
.device-card:hover {
  background: var(--accent-fade);
}
.device-card.active {
  background: var(--accent-soft);
  color: var(--accent-strong);
}
.device-card.active::before {
  background: var(--accent);
}
.device-name {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 500;
  flex: 1;
  letter-spacing: -0.01em;
}
.device-card.active .device-name { font-weight: 600; }

.device-info-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 18px; height: 18px;
  border-radius: 50%;
  font-size: 0.85rem;
  color: var(--faint);
  cursor: pointer;
  flex-shrink: 0;
  line-height: 1;
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.device-info-btn:hover {
  color: var(--accent);
  background: var(--panel);
}
.device-card.active .device-info-btn { color: var(--accent); }