/* ============================================================
   pa-ui-rail.css — Porcelain Futurism Left Rail UI Overlay.
   Canon: docs/design/PORCELAIN_FUTURISM_2026-08-16.md
   Tokens: juwel-ds.css (token-pure, no hardcoded stray colors).
   Law: ink = you act · iridescence = JUWEL acts.
   No serif. No italics. No emoji. Hit targets 36–44px.
   ============================================================ */

/* ── Rail container placing & coordinates ─────────────────── */
.psh-rail,
#pshRail {
  position: absolute !important;
  left: 24px !important;
  top: 50% !important;
  transform: translateY(-50%) !important;
  z-index: 35 !important;
  display: flex !important;
  flex-direction: column !important;
  gap: 6px !important;
  padding: 10px 8px !important;
  border-radius: 22px !important;
  border: 1px solid var(--line) !important;
  background: color-mix(in srgb, var(--surface) 85%, transparent) !important;
  backdrop-filter: blur(20px) !important;
  -webkit-backdrop-filter: blur(20px) !important;
  box-shadow: var(--shadow-1) !important;
  width: auto !important;
  min-width: 56px !important;
  max-width: 58px !important;
  box-sizing: border-box !important;
  font-style: normal !important;
  pointer-events: auto !important;
}

/* ── Rail buttons: strictly 36–44px hit targets ───────────── */
.psh-rail-btn,
.psh-rail .psh-rail-btn,
#pshRail .psh-rail-btn {
  width: 40px !important;
  height: 40px !important;
  min-width: 36px !important;
  min-height: 36px !important;
  max-width: 44px !important;
  max-height: 44px !important;
  display: grid !important;
  place-items: center !important;
  padding: 0 !important;
  margin: 0 !important;
  border: 0 !important;
  border-radius: 12px !important;
  background: transparent;
  color: var(--ink-3);
  cursor: pointer !important;
  position: relative !important;
  box-sizing: border-box !important;
  font-family: var(--ff) !important;
  font-style: normal !important;
  font-size: 13px !important;
  font-weight: 500 !important;
  line-height: 1 !important;
  transition: background var(--dur-1) var(--ease-out),
              color var(--dur-1) var(--ease-out),
              box-shadow var(--dur-1) var(--ease-out),
              transform var(--dur-1) var(--ease-out);
}

.psh-rail-btn:hover,
#pshRail .psh-rail-btn:hover {
  background: var(--surface-2) !important;
  color: var(--ink) !important;
}

.psh-rail-btn:active,
#pshRail .psh-rail-btn:active {
  transform: scale(0.96) !important;
}

.psh-rail-btn:focus-visible,
#pshRail .psh-rail-btn:focus-visible {
  outline: 2px solid var(--irid) !important;
  outline-offset: 2px !important;
}

/* ── Selected state ───────────────────────────────────────── */
.psh-rail-btn[aria-pressed="true"],
.psh-rail-btn[data-selected="true"],
.psh-rail-btn.is-selected,
#pshRail .psh-rail-btn[aria-pressed="true"],
#pshRail .psh-rail-btn[data-selected="true"],
#pshRail .psh-rail-btn.is-selected {
  background: var(--surface-3) !important;
  color: var(--ink) !important;
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--line) 80%, transparent) !important;
}

/* Subtle active indicator bar on left edge */
.psh-rail-btn[aria-pressed="true"]::before,
.psh-rail-btn[data-selected="true"]::before,
.psh-rail-btn.is-selected::before {
  content: "" !important;
  position: absolute !important;
  left: 2px !important;
  top: 50% !important;
  transform: translateY(-50%) !important;
  width: 3px !important;
  height: 18px !important;
  border-radius: var(--r-full, 999px) !important;
  background: var(--irid) !important;
  pointer-events: none !important;
}

/* ── Separator ────────────────────────────────────────────── */
.psh-rail-sep,
#pshRail .psh-rail-sep {
  height: 1px !important;
  background: var(--line) !important;
  margin: 4px 6px !important;
  flex: none !important;
}

/* ── Floating Tooltips ────────────────────────────────────── */
.psh-rail-btn::after {
  content: attr(data-tooltip);
  position: absolute;
  left: calc(100% + 10px);
  top: 50%;
  transform: translateY(-50%) translateX(-4px);
  padding: 5px 11px;
  border-radius: var(--r-md, 8px);
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  font-family: var(--ff);
  font-size: 12px;
  font-weight: 500;
  font-style: normal;
  line-height: 1.2;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  box-shadow: var(--shadow-2);
  z-index: 100;
  transition: opacity 0.15s var(--ease-out),
              transform 0.15s var(--ease-out),
              visibility 0.15s;
}

.psh-rail-btn:hover::after,
.psh-rail-btn:focus-visible::after {
  opacity: 1;
  visibility: visible;
  transform: translateY(-50%) translateX(0);
}

/* ── Desk coordination: prevent window overlap ────────────── */
.psh-desk,
#pshDesk {
  padding-left: 92px !important;
}

/* Ensure desk surfaces never overlap the rail */
#pshDesk .psh-surface {
  min-width: 80px;
}

/* Standard Shell01: source38:48 envelope, dynamic inventory retained. */
@media (min-width:768px) {
  #pshRail {
    position:fixed !important; top:50% !important; left:24px !important;
    width:54px !important; min-width:54px !important; max-width:54px !important;
    height:234px !important; max-height:calc(100vh - 160px) !important;
    padding:9px 6px !important; gap:6px !important;
    overflow-y:auto !important; overflow-x:hidden !important;
    background:var(--surface,#fff) !important; box-shadow:none !important;
    backdrop-filter:none !important; -webkit-backdrop-filter:none !important;
    scrollbar-width:thin;
  }
  #pshRail .psh-rail-btn { flex:0 0 38px !important; width:38px !important; height:38px !important; min-height:38px !important; }
  #pshRail[data-shell-overflow="true"] {
    background-image:linear-gradient(var(--surface),var(--surface)),linear-gradient(var(--surface),var(--surface)),linear-gradient(var(--line),transparent),linear-gradient(transparent,var(--line)) !important;
    background-position:center top,center bottom,center top,center bottom !important;
    background-size:100% 14px,100% 14px,100% 9px,100% 9px !important;
    background-repeat:no-repeat !important;
    background-attachment:local,local,scroll,scroll !important;
  }
}