/* ==========================================================================
   万物解构 · 观察台 — liquid-glass skin for 机芯观察室
   Ported from ui/glass-ui.css + shell.css [data-glass="liquid"].
   Opt in with <body class="glass-ui">; loaded after ui/kit.css.
   Signature: 45° white edges, double hairline, inset dark rim, small blur.
   ========================================================================== */

body.glass-ui {
  --glass-ui-fill:
    linear-gradient(45deg, rgba(255, 255, 255, 0.56) 0%, transparent 22%, transparent 78%, rgba(255, 255, 255, 0.46) 100%),
    rgba(255, 255, 255, 0.035);
  --glass-ui-border: rgba(51, 51, 51, 0.1);
  --glass-ui-inner-dark: rgba(25, 40, 58, 0.16);
  --glass-ui-shadow:
    inset 2px -2px 1px -1px rgba(255, 255, 255, 0.9),
    inset -2px 2px 1px -1px rgba(255, 255, 255, 0.75),
    inset 6px -6px 1px -6px rgba(255, 255, 255, 0.5),
    inset -6px 6px 1px -6px rgba(255, 255, 255, 0.5),
    inset 0 0 5px rgba(0, 0, 0, 0.18),
    0 8px 20px rgba(20, 35, 55, 0.16);
  --glass-ui-blur: blur(2px) contrast(2.8) brightness(0.94) saturate(1.04);
  --glass-ui-thumb:
    linear-gradient(160deg, rgba(255, 255, 255, 0.98), rgba(255, 255, 255, 0.66));
  --glass-ui-thumb-shadow:
    inset 0 1px 0 #fff,
    inset 0 -3px 6px -4px rgba(0, 0, 0, 0.18),
    0 2px 6px rgba(20, 35, 55, 0.08);
}

body.dark.glass-ui {
  --glass-ui-fill:
    linear-gradient(45deg, rgba(255, 255, 255, 0.07) 0%, transparent 22%, transparent 78%, rgba(255, 255, 255, 0.05) 100%),
    rgba(255, 255, 255, 0.015);
  --glass-ui-border: rgba(255, 255, 255, 0.15);
  --glass-ui-inner-dark: rgba(0, 0, 0, 0.5);
  --glass-ui-shadow:
    inset 2px -2px 1px -1px rgba(255, 255, 255, 0.32),
    inset -2px 2px 1px -1px rgba(255, 255, 255, 0.24),
    inset 6px -6px 1px -6px rgba(255, 255, 255, 0.16),
    inset -6px 6px 1px -6px rgba(255, 255, 255, 0.16),
    inset 0 0 6px rgba(0, 0, 0, 0.65),
    0 10px 26px rgba(0, 0, 0, 0.42);
  --glass-ui-thumb:
    linear-gradient(160deg, #f1f1f4, #d4d4da);
  --glass-ui-thumb-shadow:
    inset 0 1px 0 #fff,
    inset 0 -3px 6px -4px rgba(0, 0, 0, 0.22),
    0 2px 6px rgba(0, 0, 0, 0.28);
}

/* --------------------------------------------------------------------------
   header — liquid glass strip (same pseudo-layer recipe as .site-header)
   -------------------------------------------------------------------------- */
body.glass-ui .header {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: transparent;
  border-color: transparent;
  box-shadow: none;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

body.glass-ui .header::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  border: 1px double var(--glass-ui-border);
  border-radius: inherit;
  background: rgba(255, 255, 255, 0.035);
  box-shadow:
    inset 2px -2px 1px -1px rgba(255, 255, 255, 0.9),
    inset -2px 2px 1px -1px rgba(255, 255, 255, 0.75),
    inset 6px -6px 1px -6px rgba(255, 255, 255, 0.5),
    inset -6px 6px 1px -6px rgba(255, 255, 255, 0.5),
    inset 0 0 2px rgba(0, 0, 0, 0.55),
    0 8px 20px rgba(20, 35, 55, 0.16);
  backdrop-filter: blur(2px) contrast(2.8) brightness(0.94) saturate(1.04);
  -webkit-backdrop-filter: blur(2px) contrast(2.8) brightness(0.94) saturate(1.04);
}

body.glass-ui .header::after {
  content: "";
  position: absolute;
  inset: 5px;
  z-index: 0;
  border: 1.5px solid rgba(0, 0, 0, 0.58);
  border-radius: inherit;
  background:
    radial-gradient(320px 70px at 0% 0%, rgba(255, 255, 255, 0.32), transparent 72%),
    radial-gradient(280px 60px at 100% 100%, rgba(255, 255, 255, 0.24), transparent 72%);
  filter: blur(3px);
  opacity: 0.52;
  pointer-events: none;
}

body.glass-ui .header > * {
  position: relative;
  z-index: 1;
}

body.dark.glass-ui .header::before {
  border-color: rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.045);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.34),
    inset 0 7px 12px -10px rgba(255, 255, 255, 0.12),
    inset 0 -11px 16px -12px rgba(0, 0, 0, 0.65),
    inset 0 0 3px rgba(0, 0, 0, 0.7),
    0 10px 26px rgba(0, 0, 0, 0.42);
}

body.dark.glass-ui .header::after {
  border-color: rgba(0, 0, 0, 0.68);
}

/* header sub-pills share the same fill */
body.glass-ui .header-specs,
body.glass-ui .source-link,
body.glass-ui .header-tools {
  border: 1px double var(--glass-ui-border);
  background: var(--glass-ui-fill);
  box-shadow:
    inset 2px -2px 1px -1px rgba(255, 255, 255, 0.82),
    inset -2px 2px 1px -1px rgba(255, 255, 255, 0.6),
    inset 0 0 3px rgba(0, 0, 0, 0.14);
}

body.dark.glass-ui .header-specs,
body.dark.glass-ui .source-link,
body.dark.glass-ui .header-tools {
  border-color: var(--glass-ui-border);
  background: var(--glass-ui-fill);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.2),
    inset 0 0 3px rgba(0, 0, 0, 0.45);
}

/* --------------------------------------------------------------------------
   workbench frame + panels
   -------------------------------------------------------------------------- */
body.glass-ui .observatory {
  border: 1px double var(--glass-ui-border);
  background: var(--glass-ui-fill);
  box-shadow:
    var(--glass-ui-shadow),
    0 22px 60px rgba(20, 35, 55, 0.16);
}

body.dark.glass-ui .observatory {
  border-color: var(--glass-ui-border);
  background: var(--glass-ui-fill);
  box-shadow:
    var(--glass-ui-shadow),
    0 24px 70px rgba(0, 0, 0, 0.5);
}

body.glass-ui .view-header {
  border: 1px double var(--glass-ui-border);
  background: var(--glass-ui-fill);
  box-shadow: var(--glass-ui-shadow);
}

body.dark.glass-ui .view-header {
  border-color: var(--glass-ui-border);
  background: var(--glass-ui-fill);
  box-shadow: var(--glass-ui-shadow);
}

body.glass-ui .system-nav,
body.glass-ui .inspector {
  border: 1px double var(--glass-ui-border);
  background:
    linear-gradient(45deg, rgba(255, 255, 255, 0.56) 0%, transparent 23%, transparent 77%, rgba(255, 255, 255, 0.44) 100%),
    #ffffff;
  box-shadow: var(--glass-ui-shadow);
}

body.dark.glass-ui .system-nav,
body.dark.glass-ui .inspector {
  border-color: var(--glass-ui-border);
  background:
    linear-gradient(45deg, rgba(255, 255, 255, 0.11) 0%, transparent 23%, transparent 77%, rgba(255, 255, 255, 0.08) 100%),
    #232327;
  box-shadow: var(--glass-ui-shadow);
}

body.glass-ui .viewport {
  border: 1px double var(--glass-ui-border);
  background: var(--canvas-bg);
  box-shadow: var(--glass-ui-shadow);
}

body.dark.glass-ui .viewport {
  border-color: var(--glass-ui-border);
  box-shadow: var(--glass-ui-shadow);
}

body.glass-ui .transport-bar {
  border: 1px double var(--glass-ui-border);
  background: var(--glass-ui-fill);
  box-shadow: var(--glass-ui-shadow);
}

body.dark.glass-ui .transport-bar {
  border-color: var(--glass-ui-border);
  background: var(--glass-ui-fill);
  box-shadow: var(--glass-ui-shadow);
}

/* --------------------------------------------------------------------------
   segmented controls
   -------------------------------------------------------------------------- */
body.glass-ui .view-modes,
body.glass-ui .side-switch,
body.glass-ui .speed-control,
body.glass-ui .crown-position {
  border: 1px double var(--glass-ui-border);
  background: var(--glass-ui-fill);
  box-shadow: var(--glass-ui-shadow);
}

body.dark.glass-ui .view-modes,
body.dark.glass-ui .side-switch,
body.dark.glass-ui .speed-control,
body.dark.glass-ui .crown-position {
  border-color: var(--glass-ui-border);
  background: var(--glass-ui-fill);
  box-shadow: var(--glass-ui-shadow);
}

body.glass-ui #mode-thumb,
body.glass-ui .speed-control button.active,
body.glass-ui .crown-position button.active,
body.glass-ui .side-switch button.active {
  border: 1px solid rgba(255, 255, 255, 0.8);
  background: var(--glass-ui-thumb);
  box-shadow: var(--glass-ui-thumb-shadow);
}

body.dark.glass-ui #mode-thumb,
body.dark.glass-ui .speed-control button.active,
body.dark.glass-ui .crown-position button.active,
body.dark.glass-ui .side-switch button.active {
  border-color: rgba(255, 255, 255, 0.72);
  background: var(--glass-ui-thumb);
  box-shadow: var(--glass-ui-thumb-shadow);
}

body.dark.glass-ui .view-modes button.active,
body.dark.glass-ui .side-switch button.active,
body.dark.glass-ui .speed-control button.active,
body.dark.glass-ui .crown-position button.active {
  color: #1b1b1e;
}

/* --------------------------------------------------------------------------
   floating controls
   -------------------------------------------------------------------------- */
body.glass-ui .viewport-tools,
body.glass-ui .explosion-control,
body.glass-ui .selection-chip,
body.glass-ui .light-panel,
body.glass-ui .light-toggle,
body.glass-ui .guide-toggle {
  border: 1px double var(--glass-ui-border);
  background: var(--glass-ui-fill);
  box-shadow: var(--glass-ui-shadow);
  backdrop-filter: blur(6px) saturate(1.5);
  -webkit-backdrop-filter: blur(6px) saturate(1.5);
}

body.dark.glass-ui .viewport-tools,
body.dark.glass-ui .explosion-control,
body.dark.glass-ui .selection-chip,
body.dark.glass-ui .light-panel,
body.dark.glass-ui .light-toggle,
body.dark.glass-ui .guide-toggle {
  border-color: var(--glass-ui-border);
  background: var(--glass-ui-fill);
  box-shadow: var(--glass-ui-shadow);
}

body.glass-ui #selection-chip {
  border-color: var(--accent-line);
}

/* --------------------------------------------------------------------------
   rows
   -------------------------------------------------------------------------- */
body.glass-ui .part-shortcuts button {
  border: 1px double var(--glass-ui-border);
  background: var(--glass-ui-fill);
  box-shadow:
    inset 1px -1px 1px -1px rgba(255, 255, 255, 0.7),
    inset -1px 1px 1px -1px rgba(255, 255, 255, 0.5),
    0 1px 3px rgba(20, 35, 55, 0.05);
}

body.dark.glass-ui .part-shortcuts button {
  border-color: var(--glass-ui-border);
  background: var(--glass-ui-fill);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.12),
    0 1px 3px rgba(0, 0, 0, 0.3);
}

body.glass-ui .part-shortcuts button.active {
  border: 1px double var(--accent-line);
  background:
    linear-gradient(135deg, rgba(234, 240, 252, 0.88), rgba(234, 240, 252, 0.56)),
    var(--glass-ui-fill);
}

body.dark.glass-ui .part-shortcuts button.active {
  border-color: var(--glass-ui-border);
  background:
    linear-gradient(135deg, rgba(48, 58, 76, 0.92), rgba(44, 44, 46, 0.74)),
    var(--glass-ui-fill);
}

body.glass-ui .system-item.active,
body.glass-ui .power-path button.active {
  border: 1px double rgba(255, 255, 255, 0.56);
  background:
    linear-gradient(45deg, rgba(255, 255, 255, 0.58), transparent 24%, transparent 76%, rgba(255, 255, 255, 0.38)),
    var(--accent-soft);
  box-shadow:
    inset 1px -1px 1px -1px rgba(255, 255, 255, 0.8),
    inset -1px 1px 1px -1px rgba(255, 255, 255, 0.6),
    0 2px 6px rgba(20, 35, 55, 0.07);
}

body.dark.glass-ui .system-item.active,
body.dark.glass-ui .power-path button.active {
  border-color: rgba(255, 255, 255, 0.12);
  background:
    linear-gradient(45deg, rgba(255, 255, 255, 0.1), transparent 24%, transparent 76%, rgba(255, 255, 255, 0.05)),
    var(--accent-soft);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.12),
    0 2px 6px rgba(0, 0, 0, 0.25);
}

/* playback capsule */
body.glass-ui .playback {
  border: 1px double var(--glass-ui-border);
  background: var(--glass-ui-fill);
  box-shadow: var(--glass-ui-shadow);
}

body.dark.glass-ui .playback {
  border-color: var(--glass-ui-border);
  background: var(--glass-ui-fill);
  box-shadow: var(--glass-ui-shadow);
}

/* light popover keeps the same rim */
body.glass-ui .light-panel {
  border-radius: var(--r-lg);
}

/* drawers / doc reader pick up the rim language */
body.glass-ui .source-drawer,
body.glass-ui .doc-panel {
  border: 1px double var(--glass-ui-border);
  box-shadow:
    var(--glass-ui-shadow),
    0 30px 90px rgba(20, 35, 55, 0.28);
}

/* --------------------------------------------------------------------------
   narrow screens: keep the rim, drop the extra blur cost
   -------------------------------------------------------------------------- */
@media (max-width: 900px) {
  body.glass-ui .viewport-tools,
  body.glass-ui .explosion-control,
  body.glass-ui .selection-chip,
  body.glass-ui .light-panel,
  body.glass-ui .light-toggle,
  body.glass-ui .guide-toggle {
    backdrop-filter: blur(4px) saturate(1.3);
    -webkit-backdrop-filter: blur(4px) saturate(1.3);
  }
}

/* the mode thumb is a separate layer: keep the buttons transparent so it shows through */
body.glass-ui .view-modes button.active,
body.dark.glass-ui .view-modes button.active {
  background: transparent;
  box-shadow: none;
}