/* =====================================================
   DOCK CONTAINER  (DOCK-01)
   ===================================================== */
#dock {
  position: fixed;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  z-index: var(--z-dock);               /* 300 — above windows */

  display: flex;
  flex-direction: row;
  align-items: flex-end;                /* icons grow upward from dock baseline */
  gap: 6px;
  padding: var(--dock-padding);          /* 8px 12px */

  /* Frosted glass background */
  background: var(--dock-bg);
  backdrop-filter: var(--dock-blur);
  -webkit-backdrop-filter: var(--dock-blur);
  border-radius: var(--dock-radius);    /* 16px */
  border: 1px solid rgba(255, 255, 255, 0.18);

  /* Subtle inner shadow for depth */
  box-shadow:
    0 4px 24px rgba(0, 0, 0, 0.22),
    inset 0 1px 0 rgba(255, 255, 255, 0.25);

  user-select: none;
  -webkit-user-select: none;
}

/* Firefox backdrop-filter fallback */
@supports not (backdrop-filter: blur(1px)) {
  #dock {
    background: rgba(210, 210, 210, 0.92);
  }
  @media (prefers-color-scheme: dark) {
    #dock {
      background: rgba(40, 40, 40, 0.92);
    }
  }
}

/* =====================================================
   DOCK ICON WRAPPER  (DOCK-01, DOCK-02)
   ===================================================== */
.dock-item {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* =====================================================
   DOCK ICON  (DOCK-01, DOCK-02)
   ===================================================== */
.dock-icon {
  width: var(--dock-icon-size);          /* 56px — overridden by JS on hover */
  height: var(--dock-icon-size);
  border-radius: 14px;                   /* macOS rounded square at 56px */
  overflow: hidden;
  display: block;

  /* Smooth magnification — spring-like cubic-bezier matches macOS feel */
  transition:
    width  0.15s cubic-bezier(0.34, 1.56, 0.64, 1),
    height 0.15s cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Grow upward from the dock bottom — transform-origin for visual anchor */
  transform-origin: bottom center;
}

.dock-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  pointer-events: none;                  /* prevent img drag interfering */
}

/* Hover lift effect on the icon itself */
.dock-icon:hover {
  filter: brightness(1.08);
}

/* =====================================================
   TOOLTIP  (DOCK-03)
   ===================================================== */
.dock-tooltip {
  position: absolute;
  bottom: calc(100% + 10px);            /* above the icon, 10px gap */
  left: 50%;
  transform: translateX(-50%);

  background: rgba(30, 30, 30, 0.88);
  color: #ffffff;
  font-family: var(--font-system);
  font-size: 12px;
  font-weight: 500;
  line-height: 1;
  white-space: nowrap;
  padding: 5px 10px;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.12);

  /* Hidden by default; fade in on hover with delay */
  opacity: 0;
  pointer-events: none;                  /* tooltip never captures mouse events */
  transition: opacity 0.15s ease;
  transition-delay: 0s;                  /* delay controlled by .dock-item:hover below */
}

/* Show tooltip after cursor pauses on icon */
.dock-item:hover .dock-tooltip {
  opacity: 1;
  transition-delay: 0.4s;
}

/* Small triangle pointer at the bottom of the tooltip */
.dock-tooltip::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-top-color: rgba(30, 30, 30, 0.88);
}

/* =====================================================
   DOT INDICATOR  (DOCK-04)
   ===================================================== */
.dock-dot {
  display: none;                         /* shown by WindowManager.open() */
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.9);
  margin-top: 3px;
  flex-shrink: 0;
}

@media (prefers-color-scheme: dark) {
  .dock-dot {
    background: rgba(255, 255, 255, 0.85);
  }
}