/* ============================================================
   DIGITAL HARBOR — Interactive 42U Rack Explorer (embedded)
   Container-scoped blueprint UI. All rules prefixed .dhrk /
   #dh-rack so nothing leaks into the rest of the theme.
   ============================================================ */

#dh-rack {
  --rk-cyan: #4fd6e0;
  --rk-cyan-dim: #2b9fb4;
  --rk-cyan-soft: rgba(79, 214, 224, 0.55);
  --rk-line: rgba(79, 214, 224, 0.22);
  --rk-line-strong: rgba(79, 214, 224, 0.42);
  --rk-panel: rgba(8, 20, 34, 0.72);
  --rk-panel-solid: rgba(7, 16, 28, 0.94);
  --rk-text: #cfeeff;
  --rk-text-dim: #7fa2ba;
  --rk-white: #eafaff;
  --rk-glow: 0 0 12px rgba(79, 214, 224, 0.32);
  --rk-mono: "IBM Plex Mono", "SFMono-Regular", "JetBrains Mono", "Consolas", ui-monospace, monospace;

  position: relative;
  width: 100%;
  height: clamp(540px, 80vh, 860px);
  border: 1px solid rgba(120, 231, 238, 0.20);
  border-radius: 24px;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 50% 32%, #0c1c33 0%, #08111f 48%, #060c16 100%);
  box-shadow: inset 0 0 60px rgba(6, 12, 28, 0.55), 0 24px 60px -32px rgba(6, 12, 28, 0.7);
  color: var(--rk-text);
  font-family: var(--rk-mono);
  -webkit-font-smoothing: antialiased;
  user-select: none;
  touch-action: pan-y;                 /* section itself scrolls the page */
  contain: layout paint;
}

/* ---- 3D stage (canvas + labels) ---- */
.dhrk-stage {
  position: absolute;
  inset: 0;
  z-index: 1;
}
.dhrk-stage canvas { display: block; }
.dhrk-label-layer { position: absolute; inset: 0; z-index: 2; pointer-events: none; overflow: hidden; }

/* ---- Blueprint grid + corners overlay ---- */
.dhrk-bp {
  position: absolute; inset: 0; z-index: 3; pointer-events: none;
  background-image:
    linear-gradient(var(--rk-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--rk-line) 1px, transparent 1px);
  background-size: 42px 42px;
  opacity: 0.12;
  -webkit-mask-image: radial-gradient(ellipse at center, #000 42%, transparent 86%);
  mask-image: radial-gradient(ellipse at center, #000 42%, transparent 86%);
}
.dhrk-corner {
  position: absolute; width: 24px; height: 24px;
  border: 1px solid var(--rk-cyan-soft); opacity: 0.6; z-index: 3; pointer-events: none;
}
.dhrk-corner.tl { top: 14px; left: 14px; border-right: 0; border-bottom: 0; }
.dhrk-corner.tr { top: 14px; right: 14px; border-left: 0; border-bottom: 0; }
.dhrk-corner.bl { bottom: 14px; left: 14px; border-right: 0; border-top: 0; }
.dhrk-corner.br { bottom: 14px; right: 14px; border-left: 0; border-top: 0; }

/* ---- Header ---- */
.dhrk-header {
  position: absolute; top: 18px; left: 22px; z-index: 6;
  display: flex; gap: 12px; align-items: center; pointer-events: none;
}
.dhrk-mark {
  width: 30px; height: 30px; border: 1px solid var(--rk-cyan); position: relative; flex: none;
  box-shadow: var(--rk-glow), inset 0 0 10px rgba(79, 214, 224, 0.15);
}
.dhrk-mark::before, .dhrk-mark::after { content: ""; position: absolute; background: var(--rk-cyan); }
.dhrk-mark::before { left: 50%; top: 5px; bottom: 5px; width: 1px; transform: translateX(-50%); }
.dhrk-mark::after  { top: 50%; left: 5px; right: 5px; height: 1px; transform: translateY(-50%); }
.dhrk-header h3 {
  margin: 0; font-size: 13px; letter-spacing: 2.5px; font-weight: 600;
  color: var(--rk-white); text-shadow: var(--rk-glow);
}
.dhrk-header h3 .sep { color: var(--rk-cyan); }
.dhrk-header .dhrk-sub { margin-top: 3px; font-size: 9.5px; letter-spacing: 1.8px; color: var(--rk-text-dim); }

/* ---- Status panel ---- */
.dhrk-status {
  position: absolute; top: 18px; right: 22px; z-index: 6;
  background: var(--rk-panel); border: 1px solid var(--rk-line-strong);
  padding: 11px 15px; min-width: 220px; backdrop-filter: blur(6px);
  box-shadow: inset 0 0 18px rgba(79, 214, 224, 0.06); pointer-events: none;
}
.dhrk-strow { display: flex; align-items: center; gap: 8px; }
.dhrk-dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--rk-cyan);
  box-shadow: 0 0 8px var(--rk-cyan); animation: dhrkpulse 1.6s ease-in-out infinite;
}
@keyframes dhrkpulse { 0%,100% { opacity: 1; } 50% { opacity: 0.3; } }
.dhrk-stlabel { font-size: 9.5px; letter-spacing: 3px; color: var(--rk-text-dim); }
.dhrk-stvalue { margin-top: 7px; font-size: 14px; letter-spacing: 1.6px; color: var(--rk-white); font-weight: 600; text-shadow: var(--rk-glow); }
.dhrk-stmeta { margin-top: 7px; font-size: 9.5px; letter-spacing: 1.4px; color: var(--rk-cyan-dim); display: flex; gap: 8px; align-items: center; }
.dhrk-stmeta .div { opacity: 0.5; }

/* ---- Status load bar ---- */
.dhrk-loadbarwrap { height: 3px; background: rgba(79, 214, 224, 0.15); margin: 8px 0 6px; }
.dhrk-loadfill { display: block; height: 100%; width: 0; background: var(--rk-cyan); box-shadow: var(--rk-glow); transition: width 0.4s ease; }
.dhrk-stvalue.flash { color: var(--rk-cyan); }

/* ---- Component library side panel ---- */
.dhrk-libtoggle {
  position: absolute; top: 16px; left: 22px; z-index: 9; display: none; align-items: center; gap: 7px;
  height: 34px; padding: 0 12px; background: var(--rk-panel-solid); border: 1px solid var(--rk-line-strong);
  color: var(--rk-white); font-family: var(--rk-mono); font-size: 10.5px; letter-spacing: 1.6px; font-weight: 600; cursor: pointer;
}
.dhrk-libtoggle svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; }
.dhrk-libtoggle:hover { border-color: var(--rk-cyan); box-shadow: var(--rk-glow); }

.dhrk-lib {
  position: absolute; top: 66px; left: 18px; bottom: 78px; width: 246px; z-index: 8;
  display: flex; flex-direction: column;
  background: var(--rk-panel-solid); border: 1px solid var(--rk-line-strong);
  backdrop-filter: blur(8px); box-shadow: inset 0 0 22px rgba(79, 214, 224, 0.06), 0 20px 50px -30px rgba(0,0,0,0.7);
}
.dhrk-libhead { display: flex; align-items: center; justify-content: space-between; padding: 12px 13px 10px; border-bottom: 1px solid var(--rk-line); }
.dhrk-libtitle { font-size: 11px; letter-spacing: 2.2px; color: var(--rk-white); font-weight: 600; }
.dhrk-libx { display: none; background: none; border: none; color: var(--rk-text-dim); font-size: 19px; line-height: 1; cursor: pointer; }
.dhrk-libx:hover { color: var(--rk-cyan); }
.dhrk-presetrow { padding: 10px 13px 6px; border-bottom: 1px solid var(--rk-line); }
.dhrk-libsub { font-size: 8.5px; letter-spacing: 2px; color: var(--rk-text-dim); margin-bottom: 7px; }
.dhrk-chips { display: flex; flex-wrap: wrap; gap: 5px; }
.dhrk-chip {
  padding: 4px 9px; background: rgba(79, 214, 224, 0.07); border: 1px solid var(--rk-line);
  color: var(--rk-text); font-family: var(--rk-mono); font-size: 9.5px; letter-spacing: 0.6px; cursor: pointer; transition: all 0.14s;
}
.dhrk-chip:hover { border-color: var(--rk-cyan); color: var(--rk-white); background: rgba(79, 214, 224, 0.16); }
.dhrk-libfilter {
  margin: 10px 13px; padding: 8px 10px; background: rgba(6, 16, 30, 0.7); border: 1px solid var(--rk-line);
  color: var(--rk-white); font-family: var(--rk-mono); font-size: 11px; letter-spacing: 0.5px; outline: none;
}
.dhrk-libfilter:focus { border-color: var(--rk-cyan-soft); }
.dhrk-libfilter::placeholder { color: var(--rk-text-dim); }
.dhrk-lib-groups { flex: 1; overflow-y: auto; padding: 0 8px 10px; }
.dhrk-lib-groups::-webkit-scrollbar { width: 7px; }
.dhrk-lib-groups::-webkit-scrollbar-thumb { background: rgba(79, 214, 224, 0.25); border-radius: 4px; }
.dhrk-grp { margin-top: 4px; }
.dhrk-grp-head {
  display: flex; align-items: center; gap: 7px; width: 100%; padding: 8px 6px; background: none; border: none;
  color: var(--rk-text); font-family: var(--rk-mono); font-size: 10.5px; letter-spacing: 1px; cursor: pointer; text-align: left;
}
.dhrk-grp-head:hover { color: var(--rk-white); }
.dhrk-grp-head .tw { color: var(--rk-cyan); transition: transform 0.18s; display: inline-block; font-size: 10px; }
.dhrk-grp-head.open .tw { transform: rotate(90deg); }
.dhrk-grp-head .gn { flex: 1; }
.dhrk-grp-head .gc { color: var(--rk-text-dim); font-size: 9px; }
.dhrk-grp-body { display: none; flex-direction: column; gap: 3px; padding: 2px 0 6px 6px; }
.dhrk-grp-body.open { display: flex; }
.dhrk-item {
  display: flex; align-items: center; justify-content: space-between; gap: 8px; width: 100%; padding: 7px 9px;
  background: rgba(79, 214, 224, 0.04); border: 1px solid transparent; border-left: 2px solid var(--rk-line-strong);
  color: var(--rk-text); font-family: var(--rk-mono); font-size: 10.5px; letter-spacing: 0.4px; cursor: pointer; text-align: left; transition: all 0.13s;
}
.dhrk-item:hover { background: rgba(79, 214, 224, 0.14); color: var(--rk-white); }
.dhrk-item .it-dot { width: 8px; height: 8px; border-radius: 2px; flex: none; box-shadow: 0 0 5px currentColor; }
.dhrk-item .it-n { flex: 1; }
.dhrk-item .it-u { font-size: 9px; color: var(--rk-cyan); background: rgba(79, 214, 224, 0.12); padding: 1px 6px; flex: none; }

/* category colour legend */
.dhrk-legend { display: flex; flex-wrap: wrap; gap: 5px 11px; padding: 8px 13px 10px; border-bottom: 1px solid var(--rk-line); }
.dhrk-legend .lg { display: flex; align-items: center; gap: 5px; font-size: 8.5px; letter-spacing: 0.6px; color: var(--rk-text-dim); }
.dhrk-legend .lg i { width: 7px; height: 7px; border-radius: 2px; flex: none; }

/* ---- Interaction hint ---- */
.dhrk-hint {
  position: absolute; bottom: 96px; left: 50%; transform: translateX(-50%); z-index: 5;
  font-size: 9.5px; letter-spacing: 1.8px; color: var(--rk-text-dim);
  display: flex; gap: 9px; align-items: center; opacity: 0.8; pointer-events: none;
  white-space: nowrap; max-width: calc(100% - 32px); overflow: hidden; text-overflow: ellipsis;
}
.dhrk-hint span { color: var(--rk-cyan); opacity: 0.6; }

/* ---- Inspector ---- */
.dhrk-inspector {
  position: absolute; bottom: 96px; right: 22px; z-index: 6; width: 272px;
  background: var(--rk-panel-solid); border: 1px solid var(--rk-cyan-soft);
  padding: 13px 15px 15px; backdrop-filter: blur(8px);
  box-shadow: var(--rk-glow), inset 0 0 22px rgba(79, 214, 224, 0.07);
  transition: opacity 0.3s, transform 0.3s;
}
.dhrk-inspector.hidden { opacity: 0; transform: translateY(12px); pointer-events: none; }
.dhrk-insphead { display: flex; justify-content: space-between; align-items: center; }
.dhrk-inspid { font-size: 10.5px; letter-spacing: 2px; color: #051019; background: var(--rk-cyan); padding: 2px 8px; font-weight: 700; }
.dhrk-inspclose { background: none; border: none; color: var(--rk-text-dim); font-size: 20px; line-height: 1; cursor: pointer; padding: 0 4px; }
.dhrk-inspclose:hover { color: var(--rk-cyan); }
.dhrk-inspector h4 { margin: 10px 0 11px; font-size: 15px; letter-spacing: 1.3px; color: var(--rk-white); font-weight: 600; }
.dhrk-inspspec { display: flex; gap: 10px; margin-bottom: 11px; }
.dhrk-inspspec .spec { flex: 1; border: 1px solid var(--rk-line); padding: 6px 9px; }
.dhrk-inspspec .spec span { display: block; font-size: 8.5px; letter-spacing: 2px; color: var(--rk-text-dim); }
.dhrk-inspspec .spec b { display: block; margin-top: 4px; font-size: 12.5px; color: var(--rk-cyan); font-weight: 600; }
.dhrk-inspector p { font-size: 11px; line-height: 1.62; color: var(--rk-text-dim); letter-spacing: 0.3px; margin: 0; }
.dhrk-inspactions { display: flex; gap: 6px; margin-top: 12px; flex-wrap: wrap; }
.dhrk-ibtn {
  flex: 1 1 auto; padding: 7px 8px; background: rgba(79, 214, 224, 0.06); border: 1px solid var(--rk-line-strong);
  color: var(--rk-text); font-family: var(--rk-mono); font-size: 9.5px; letter-spacing: 1px; font-weight: 600; cursor: pointer; transition: all 0.14s;
}
.dhrk-ibtn:hover { border-color: var(--rk-cyan); color: var(--rk-white); background: rgba(79, 214, 224, 0.15); }
.dhrk-ibtn.danger { color: #ff9a9a; border-color: rgba(255, 120, 120, 0.4); }
.dhrk-ibtn.danger:hover { background: rgba(255, 90, 90, 0.16); border-color: #ff7a7a; color: #fff; }

/* ---- Tooltip ---- */
.dhrk-tooltip {
  position: absolute; z-index: 8; pointer-events: none;
  background: var(--rk-panel-solid); border: 1px solid var(--rk-cyan-soft);
  padding: 5px 9px; transform: translate(14px, 14px); box-shadow: var(--rk-glow);
  max-width: 220px; transition: opacity 0.12s;
}
.dhrk-tooltip.hidden { opacity: 0; }
.dhrk-tooltip .tt-id { display: block; font-size: 8.5px; letter-spacing: 2px; color: var(--rk-cyan); }
.dhrk-tooltip .tt-name { display: block; margin-top: 2px; font-size: 11.5px; letter-spacing: 1px; color: var(--rk-white); }

/* ---- CSS2D 3D labels ---- */
.dhrk-bp-label {
  font-family: var(--rk-mono); font-size: 9.5px; letter-spacing: 1.4px; color: var(--rk-text);
  white-space: nowrap; padding: 3px 7px; background: rgba(6, 16, 32, 0.78);
  border: 1px solid var(--rk-line-strong); border-left: 2px solid var(--rk-cyan);
  transform: translate(0, -50%); text-shadow: 0 0 6px rgba(79, 214, 224, 0.4);
  transition: opacity 0.2s, color 0.2s, border-color 0.2s;
}
.dhrk-bp-label .lb-id { color: var(--rk-cyan); margin-right: 6px; }
.dhrk-bp-label.hot { color: var(--rk-white); border-color: var(--rk-cyan); background: rgba(10, 26, 48, 0.92); }
.dhrk-dim-label { font-family: var(--rk-mono); font-size: 9.5px; letter-spacing: 2px; color: var(--rk-cyan-dim); background: transparent; white-space: nowrap; }
.dhrk-axis-label { font-family: var(--rk-mono); font-size: 11px; font-weight: 700; letter-spacing: 1px; color: var(--rk-cyan); text-shadow: var(--rk-glow); }

/* ---- Control panel ---- */
.dhrk-controls {
  position: absolute; bottom: 20px; left: 50%; transform: translateX(-50%); z-index: 7;
  display: flex; align-items: center; gap: 14px; padding: 11px 16px;
  background: var(--rk-panel); border: 1px solid var(--rk-line-strong);
  backdrop-filter: blur(10px); border-radius: 4px;
  box-shadow: inset 0 0 24px rgba(79, 214, 224, 0.06), 0 8px 40px rgba(0, 0, 0, 0.5);
  max-width: calc(100% - 32px); flex-wrap: wrap; justify-content: center;
}
.dhrk-cgroup { display: flex; align-items: center; gap: 7px; }
.dhrk-btn {
  display: inline-flex; align-items: center; gap: 7px; height: 36px; padding: 0 13px;
  background: rgba(79, 214, 224, 0.06); border: 1px solid var(--rk-line-strong);
  color: var(--rk-text); font-family: var(--rk-mono); font-size: 10.5px; letter-spacing: 1.8px;
  font-weight: 600; cursor: pointer; transition: all 0.16s;
}
.dhrk-btn.icon { padding: 0; width: 36px; justify-content: center; }
.dhrk-btn svg.hidden { display: none; }
.dhrk-btn svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.dhrk-btn:hover { background: rgba(79, 214, 224, 0.16); border-color: var(--rk-cyan); color: var(--rk-white); box-shadow: var(--rk-glow); }
.dhrk-btn:active { transform: translateY(1px); }

.dhrk-slider { display: flex; align-items: center; gap: 9px; }
.dhrk-sllabel { font-size: 8.5px; letter-spacing: 2px; color: var(--rk-text-dim); }
.dhrk-slpct { font-size: 9.5px; letter-spacing: 1px; color: var(--rk-cyan); width: 32px; text-align: right; }
#dh-rack input[type="range"] {
  -webkit-appearance: none; appearance: none; width: 180px; height: 3px; margin: 0;
  background: linear-gradient(90deg, var(--rk-cyan) 0%, var(--rk-cyan) var(--fill, 0%), rgba(79, 214, 224, 0.18) var(--fill, 0%));
  outline: none; cursor: pointer;
}
#dh-rack input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none; width: 13px; height: 13px; border-radius: 50%;
  background: var(--rk-white); border: 2px solid var(--rk-cyan); box-shadow: var(--rk-glow); cursor: grab;
}
#dh-rack input[type="range"]::-moz-range-thumb {
  width: 13px; height: 13px; border-radius: 50%; background: var(--rk-white);
  border: 2px solid var(--rk-cyan); box-shadow: var(--rk-glow); cursor: grab;
}
.dhrk-toggle {
  display: inline-flex; align-items: center; gap: 7px; height: 30px; padding: 0 10px;
  background: transparent; border: 1px solid var(--rk-line); color: var(--rk-text-dim);
  font-family: var(--rk-mono); font-size: 9.5px; letter-spacing: 1.4px; cursor: pointer; transition: all 0.16s;
}
.dhrk-toggle i { width: 9px; height: 9px; border: 1px solid var(--rk-cyan-dim); position: relative; transition: all 0.16s; }
.dhrk-toggle.active { color: var(--rk-white); border-color: var(--rk-line-strong); }
.dhrk-toggle.active i { background: var(--rk-cyan); box-shadow: 0 0 8px var(--rk-cyan); border-color: var(--rk-cyan); }
.dhrk-toggle:hover { border-color: var(--rk-cyan); color: var(--rk-text); }

/* ---- Loader ---- */
.dhrk-loader {
  position: absolute; inset: 0; z-index: 20; background: rgba(6, 12, 22, 0.96);
  display: flex; align-items: center; justify-content: center; transition: opacity 0.6s;
}
.dhrk-loader.done { opacity: 0; pointer-events: none; }
.dhrk-loadframe { width: 240px; text-align: center; }
.dhrk-loadbar { height: 2px; background: rgba(79, 214, 224, 0.15); overflow: hidden; }
.dhrk-loadbar span { display: block; height: 100%; width: 40%; background: var(--rk-cyan); box-shadow: var(--rk-glow); animation: dhrkload 1.1s ease-in-out infinite; }
@keyframes dhrkload { 0% { transform: translateX(-120%); } 100% { transform: translateX(320%); } }
.dhrk-loadtext { margin-top: 13px; font-size: 9.5px; letter-spacing: 3px; color: var(--rk-text-dim); }

/* ---- Error ---- */
.dhrk-error { position: absolute; inset: 0; z-index: 30; background: rgba(6, 12, 22, 0.96); display: flex; align-items: center; justify-content: center; padding: 24px; }
.dhrk-error.hidden { display: none; }
.dhrk-errbox { max-width: 420px; padding: 26px; border: 1px solid rgba(255, 120, 120, 0.5); background: rgba(30, 8, 12, 0.6); }
.dhrk-errbox h4 { color: #ff8a8a; letter-spacing: 2px; font-size: 14px; margin: 0; }
.dhrk-errbox p { margin: 11px 0 0; font-size: 11.5px; color: var(--rk-text-dim); line-height: 1.6; }

/* ---- Responsive ---- */
@media (max-width: 1040px) {
  /* Library becomes a slide-in drawer toggled by the LIBRARY button */
  .dhrk-libtoggle { display: inline-flex; }
  .dhrk-header { top: 58px; }
  .dhrk-lib {
    top: 14px; bottom: 14px; left: 14px; width: min(300px, 84vw);
    transform: translateX(-115%); transition: transform 0.28s ease; z-index: 12;
  }
  .dhrk-lib.open { transform: translateX(0); }
  .dhrk-libx { display: block; }
}
@media (max-width: 860px) {
  #dh-rack { height: clamp(500px, 78vh, 680px); }
  .dhrk-header { top: 56px; left: 14px; }
  .dhrk-header h3 { font-size: 11px; letter-spacing: 1.6px; }
  .dhrk-header .dhrk-sub { display: none; }
  .dhrk-status { top: 10px; right: 14px; min-width: 150px; padding: 8px 11px; }
  .dhrk-stvalue { font-size: 11.5px; }
  .dhrk-inspector { width: auto; left: 14px; right: 14px; bottom: 132px; }
  .dhrk-hint { bottom: 132px; }
  .dhrk-controls { gap: 10px; padding: 9px 11px; bottom: 12px; }
}
@media (max-width: 560px) {
  .dhrk-btn span { display: none; }
  .dhrk-btn { padding: 0 11px; }
  .dhrk-toggles { display: none; }
  .dhrk-hint { display: none; }
  .dhrk-libtoggle span { display: none; }
  .dhrk-libtoggle { padding: 0 10px; }
}

@media (prefers-reduced-motion: reduce) {
  .dhrk-dot, .dhrk-loadbar span { animation: none; }
}