/* ============================================================
   서버실 관리 — Technical Blueprint Theme
   ============================================================ */

:root {
  /* backgrounds (lightened — softer graphite/navy) */
  --bg-0: #0e131c;
  --bg-1: #141a25;
  --bg-2: #1a2130;
  --bg-3: #232c3d;
  --bg-4: #2a3548;

  /* grid/lines */
  --grid-minor: rgba(120, 200, 240, 0.09);
  --grid-major: rgba(120, 200, 240, 0.18);
  --line-faint: rgba(170, 195, 225, 0.14);
  --line-soft:  rgba(170, 195, 225, 0.26);
  --line-hard:  rgba(170, 195, 225, 0.42);

  /* text */
  --fg-0: #f0f5ff;
  --fg-1: #c6d0e2;
  --fg-2: #8b9ab0;
  --fg-3: #5e6b80;

  /* status / accents */
  --accent: #4fd1ff;          /* cyan (primary) */
  --accent-dim: #2a7fa0;
  --ok: #00d9a3;              /* emerald */
  --warn: #f5b454;            /* amber */
  --bad: #ff5470;             /* red/pink */
  --violet: #a88bff;
  --electric: #ffd64a;        /* electric yellow */
  --electric-hot: #fff4b0;    /* hot core */

  /* pulse */
  --pulse: var(--electric);

  /* radii */
  --r-1: 2px;
  --r-2: 4px;
  --r-3: 8px;

  /* type */
  --font-sans: 'Inter', -apple-system, 'SF Pro Text', 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;

  /* timing */
  --anim-speed: 1;
  --grid-size: 28px;
}

* { box-sizing: border-box; }
html, body, #root { height: 100%; margin: 0; }

body {
  background: var(--bg-0);
  color: var(--fg-0);
  font-family: var(--font-sans);
  font-size: 13px;
  line-height: 1.4;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
  letter-spacing: 0.01em;
}

button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
input, select { font: inherit; color: inherit; }

.mono { font-family: var(--font-mono); font-feature-settings: 'tnum', 'zero'; letter-spacing: 0; }
.upper { text-transform: uppercase; letter-spacing: 0.12em; font-size: 10px; }
.dim  { color: var(--fg-2); }
.faint { color: var(--fg-3); }

/* ============================================================
   Layout
   ============================================================ */
.app {
  display: grid;
  grid-template-columns: 56px 1fr;
  grid-template-rows: 48px 1fr;
  height: 100%;
  background: var(--bg-0);
}

/* Top HUD */
.hud {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 56px 1fr auto;
  align-items: stretch;
  border-bottom: 1px solid var(--line-soft);
  background:
    linear-gradient(180deg, rgba(79,209,255,0.03), transparent),
    var(--bg-1);
  position: relative;
  z-index: 10;
}
.hud-brand {
  display: flex; align-items: center; justify-content: center;
  border-right: 1px solid var(--line-soft);
  color: var(--accent);
}
.hud-brand svg { display: block; }
.hud-center { display: flex; align-items: center; gap: 24px; padding: 0 18px; min-width: 0; }
.hud-title { display: flex; flex-direction: column; line-height: 1.15; min-width: 0; }
.hud-title .t1 { font-size: 12px; letter-spacing: 0.02em; color: var(--fg-0); font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.hud-title .t2 { font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--fg-2); }
.hud-stats { display: flex; gap: 20px; align-items: center; margin-left: auto; }
.hud-stat {
  display: flex; flex-direction: column; align-items: flex-end;
  padding-left: 18px; border-left: 1px solid var(--line-faint);
}
.hud-stat .v { font-family: var(--font-mono); font-size: 14px; color: var(--fg-0); letter-spacing: 0; }
.hud-stat .k { font-size: 9px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--fg-2); margin-top: 2px; }
.hud-right {
  display: flex; align-items: center; gap: 14px; padding: 0 18px;
  border-left: 1px solid var(--line-soft);
}
.hud-clock { font-family: var(--font-mono); font-size: 13px; color: var(--accent); }
.hud-clock-date { font-family: var(--font-mono); font-size: 10px; color: var(--fg-2); letter-spacing: 0.06em; }
.hud-live {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 10px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--fg-1);
}
.hud-live::before {
  content: ""; width: 7px; height: 7px; border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 0 0 rgba(0,217,163,0.55);
  animation: pulse-dot calc(2s / var(--anim-speed)) infinite;
}
@keyframes pulse-dot {
  0%   { box-shadow: 0 0 0 0 rgba(0,217,163,0.6); }
  70%  { box-shadow: 0 0 0 8px rgba(0,217,163,0); }
  100% { box-shadow: 0 0 0 0 rgba(0,217,163,0); }
}

/* Left rail */
.rail {
  grid-row: 2 / 3;
  display: flex; flex-direction: column; align-items: stretch;
  background: var(--bg-1);
  border-right: 1px solid var(--line-soft);
  padding: 12px 0;
  gap: 4px;
  z-index: 9;
}
.rail-btn {
  position: relative;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 3px;
  height: 52px;
  color: var(--fg-2);
  transition: color .25s ease, background .25s ease;
}
.rail-btn .lbl { font-size: 9px; letter-spacing: 0.14em; text-transform: uppercase; }
.rail-btn:hover { color: var(--fg-0); background: rgba(79,209,255,0.04); }
.rail-btn.active { color: var(--accent); background: linear-gradient(90deg, rgba(79,209,255,0.12), transparent); }
.rail-btn.active::before {
  content: ""; position: absolute; left: 0; top: 8px; bottom: 8px; width: 2px;
  background: var(--accent); box-shadow: 0 0 8px var(--accent);
}
.rail-spacer { flex: 1; }
.rail-meta {
  padding: 10px 8px; text-align: center; color: var(--fg-3);
  font-family: var(--font-mono); font-size: 9px; line-height: 1.5; letter-spacing: 0.04em;
}

/* Main */
.main {
  grid-row: 2 / 3;
  grid-column: 2 / 3;
  position: relative;
  overflow: hidden;
  background: var(--bg-0);
}

/* ============================================================
   Blueprint grid background
   ============================================================ */
.bp-grid {
  position: absolute; inset: 0;
  background-color: var(--bg-0);
  background-image:
    linear-gradient(var(--grid-minor) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-minor) 1px, transparent 1px),
    linear-gradient(var(--grid-major) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-major) 1px, transparent 1px);
  background-size:
    var(--grid-size) var(--grid-size),
    var(--grid-size) var(--grid-size),
    calc(var(--grid-size) * 5) calc(var(--grid-size) * 5),
    calc(var(--grid-size) * 5) calc(var(--grid-size) * 5);
  pointer-events: none;
}
.bp-vignette {
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at center, transparent 40%, rgba(0,0,0,0.55) 100%);
  pointer-events: none;
}

/* corner registration marks */
.bp-corner {
  position: absolute; width: 18px; height: 18px;
  border: 1px solid var(--line-soft);
  pointer-events: none;
}
.bp-corner.tl { top: 12px; left: 12px; border-right: none; border-bottom: none; }
.bp-corner.tr { top: 12px; right: 12px; border-left: none; border-bottom: none; }
.bp-corner.bl { bottom: 12px; left: 12px; border-right: none; border-top: none; }
.bp-corner.br { bottom: 12px; right: 12px; border-left: none; border-top: none; }

/* ============================================================
   Floor Plan
   ============================================================ */
.floor-wrap {
  position: absolute; inset: 0;
  display: grid;
  grid-template-columns: 1fr 300px;
}
.floor-canvas {
  position: relative;
  overflow: hidden;
}
.floor-svg {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
}
.floor-full-overlay {
  position: absolute; inset: 0;
  pointer-events: none;
  z-index: 2;
}
.floor-full-overlay .floor-full-group {
  pointer-events: auto;
}
.floor-full-overlay .floor-full-rackrow {
  display: flex;
  gap: 0;
  align-items: flex-start;
}
.floor-full-overlay .floor-full-rack-wrap {
  overflow: visible;
}
.floor-side {
  border-left: 1px solid var(--line-soft);
  background: linear-gradient(180deg, var(--bg-1), var(--bg-0));
  padding: 18px; overflow-y: auto;
  display: flex; flex-direction: column; gap: 18px;
  z-index: 2;
}

.panel {
  border: 1px solid var(--line-faint);
  background: rgba(10, 15, 24, 0.6);
  padding: 14px;
  border-radius: var(--r-2);
}
.panel-title {
  font-size: 10px; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--fg-2); margin-bottom: 10px;
  display: flex; align-items: center; justify-content: space-between;
}
.panel-title .spacer { flex: 1; height: 1px; background: var(--line-faint); margin: 0 10px; }

.legend-row { display: flex; align-items: center; gap: 10px; padding: 5px 0; font-size: 12px; color: var(--fg-1); }
.legend-swatch { width: 12px; height: 12px; border: 1px solid currentColor; border-radius: 2px; }
.legend-swatch.fill { background: currentColor; opacity: 0.25; border-color: currentColor; }
.legend-row.ok   { color: var(--ok); }
.legend-row.warn { color: var(--warn); }
.legend-row.bad  { color: var(--bad); }
.legend-row .nm { color: var(--fg-0); font-weight: 500; }
.legend-row .ct { margin-left: auto; font-family: var(--font-mono); color: var(--fg-2); }

/* Rack group marker on floor plan (SVG) */
.rg-rect { fill: rgba(20, 32, 47, 0.7); stroke-width: 1.2; transition: all .25s ease; cursor: pointer; }
.rg-rect.ok  { stroke: var(--ok); }
.rg-rect.warn{ stroke: var(--warn); }
.rg-rect.bad { stroke: var(--bad); }
.rg-rect:hover { fill: rgba(30, 50, 70, 0.85); filter: drop-shadow(0 0 8px currentColor); }
.rg-label { fill: var(--fg-0); font-family: var(--font-mono); font-size: 10px; }
.rg-sub   { fill: var(--fg-2); font-family: var(--font-mono); font-size: 8px; letter-spacing: 0.1em; }
.rg-count-dot { fill: currentColor; }

.entrance-g { cursor: default; }
.entrance-rect { fill: rgba(79,209,255,0.04); stroke: var(--accent); stroke-dasharray: 3 3; }
.entrance-label { fill: var(--accent); font-family: var(--font-mono); font-size: 9px; letter-spacing: 0.14em; }

/* Robot */
.robot-trail { stroke: var(--accent); stroke-width: 1; fill: none; stroke-dasharray: 2 4; opacity: 0.55; }
.robot-path  { stroke: var(--accent-dim); stroke-width: 1; fill: none; stroke-dasharray: 1 3; opacity: 0.4; }
.robot-ghost { fill: var(--accent); opacity: 0.15; }
.robot-dot   { fill: var(--accent); filter: drop-shadow(0 0 6px var(--accent)); }
.robot-ring  { fill: none; stroke: var(--accent); stroke-width: 1; opacity: 0.7; }
.robot-head  { stroke: var(--accent); stroke-width: 1.5; fill: none; }
.robot-label { fill: var(--fg-0); font-family: var(--font-mono); font-size: 9px; }

@keyframes robot-ping {
  0%   { r: 4; opacity: 0.7; }
  100% { r: 20; opacity: 0; }
}
.robot-ping-ring {
  fill: none; stroke: var(--accent); stroke-width: 1;
  animation: robot-ping calc(2.2s / var(--anim-speed)) infinite ease-out;
}

/* axis ticks */
.axis-tick { fill: var(--fg-3); font-family: var(--font-mono); font-size: 8px; }
.axis-line { stroke: var(--line-faint); stroke-width: 0.5; }

/* ============================================================
   Rack Detail
   ============================================================ */
.rack-wrap {
  position: absolute; inset: 0;
  display: grid;
  grid-template-columns: 1fr 320px;
}
.rack-stage {
  position: relative;
  overflow: auto;
  padding: 36px 40px 40px;
}
.rack-stage-inner {
  position: relative;
  display: flex;
  gap: 36px;
  justify-content: center;
  min-height: 100%;
  padding-top: 80px;
}

/* Power bus above racks */
.power-bus {
  position: absolute;
  top: -54px; left: 0; right: 0;
  height: 44px;
  pointer-events: none;
  overflow: visible;
}

.rack {
  position: relative;
  width: 240px;
  background: linear-gradient(180deg, #0e1826, #0a1220);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-2);
  padding: 10px 10px 10px 30px;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.03),
    0 6px 28px rgba(0,0,0,0.5);
  transition: box-shadow .3s, border-color .3s;
}
.rack.scanning {
  border-color: var(--warn);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.03),
    0 0 0 1px var(--warn),
    0 0 28px rgba(245,180,84,0.35),
    0 6px 28px rgba(0,0,0,0.5);
}
.rack.scanning::before {
  content: "";
  position: absolute; inset: -4px;
  border: 1px dashed var(--warn);
  border-radius: calc(var(--r-2) + 4px);
  pointer-events: none;
  animation: rack-scan-dash calc(1.5s / var(--anim-speed)) ease-in-out infinite;
}
.rack.scanning::after {
  content: "SCANNING";
  position: absolute;
  top: -10px; left: 50%; transform: translateX(-50%);
  padding: 2px 8px;
  background: var(--bg-0);
  color: var(--warn);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.28em;
  border: 1px solid var(--warn);
  border-radius: 2px;
  animation: rack-scan-blink calc(1s / var(--anim-speed)) ease-in-out infinite;
  z-index: 3;
}
@keyframes rack-scan-dash {
  0%, 100% { opacity: 0.5; transform: scale(1); }
  50%      { opacity: 1; transform: scale(1.01); }
}
@keyframes rack-scan-blink {
  0%, 100% { opacity: 1; box-shadow: 0 0 8px rgba(245,180,84,0.5); }
  50%      { opacity: 0.6; box-shadow: 0 0 0 rgba(245,180,84,0); }
}

/* Absent (missing) rack placeholder — shows the slot is reserved but empty */
.rack.absent {
  background: repeating-linear-gradient(45deg,
              rgba(255,255,255,0.015) 0 6px,
              transparent 6px 14px),
              var(--bg-1);
  border-style: dashed;
  border-color: var(--line-faint);
  box-shadow: none;
  opacity: 0.85;
}
.rack.absent:hover {
  border-color: var(--line-soft);
}
.rack.absent .absent-body {
  position: relative;
  flex: 1;
  min-height: 200px;
  display: flex;
  align-items: center; justify-content: center;
  border: 1px dashed var(--line-faint);
  border-radius: 2px;
  overflow: hidden;
}
.rack.absent .absent-label {
  position: relative;
  text-align: center;
  padding: 8px 12px;
  background: rgba(10,14,22,0.7);
  border: 1px dashed var(--line-soft);
  border-radius: 2px;
}
.rack-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 4px 6px 10px;
  border-bottom: 1px dashed var(--line-faint);
  margin-bottom: 8px;
}
.rack-head .id { font-family: var(--font-mono); font-size: 11px; color: var(--fg-0); letter-spacing: 0.08em; }
.rack-head .tag { font-family: var(--font-mono); font-size: 9px; color: var(--fg-2); letter-spacing: 0.14em; text-transform: uppercase; }
.rack-feed {
  position: absolute; top: -60px; left: 50%; width: 3px; height: 60px;
  transform: translateX(-50%);
  background: linear-gradient(180deg, var(--line-faint), var(--line-soft));
  border-radius: 1px;
  overflow: visible;
}
.rack-feed.on {
  background: linear-gradient(180deg, rgba(245,204,84,0.2), rgba(245,180,54,0.5));
  box-shadow: 0 0 8px rgba(245,180,54,0.4);
}
.rack-feed .bolt-pulse {
  position: absolute; top: 0; left: -3px; width: 9px; height: 9px;
  background: radial-gradient(circle, #fff8d0 0%, var(--pulse) 40%, transparent 70%);
  border-radius: 50%;
  filter: drop-shadow(0 0 6px var(--pulse));
  animation: bolt-flow calc(1.3s / var(--anim-speed)) linear infinite;
}
.rack-feed .bolt-pulse:nth-child(2) { animation-delay: 0.45s; }
.rack-feed .bolt-pulse:nth-child(3) { animation-delay: 0.9s; }
@keyframes bolt-flow {
  0%   { transform: translateY(-4px); opacity: 0; }
  15%  { opacity: 1; }
  85%  { opacity: 1; }
  100% { transform: translateY(60px);  opacity: 0; }
}
.rack-feed .bolt-spark {
  position: absolute; top: 0; left: -7px; width: 17px; height: 3px;
  opacity: 0;
  background: linear-gradient(90deg, transparent, var(--pulse) 50%, transparent);
  filter: blur(0.5px);
  animation: bolt-spark calc(1.8s / var(--anim-speed)) steps(1) infinite;
}
@keyframes bolt-spark {
  0%, 92%, 100% { opacity: 0; transform: translateY(0) scaleX(0.6); }
  94% { opacity: 1; transform: translateY(14px) scaleX(1); }
  96% { opacity: 0; transform: translateY(32px) scaleX(1.3); }
  98% { opacity: 1; transform: translateY(48px) scaleX(1); }
}

.slot {
  position: relative;
  display: grid;
  grid-template-columns: 28px 1fr 46px;
  align-items: center;
  gap: 8px;
  height: 56px;
  padding: 6px 8px;
  background: #0c1420;
  border: 1px solid var(--line-faint);
  border-radius: 2px;
  margin-bottom: 4px;
  transition: border-color .2s, background .2s;
}
.slot:hover { border-color: var(--line-hard); background: #0f1a2c; }
.slot.powered {
  border-color: rgba(255,214,74,0.22);
}
.slot.empty {
  background:
    repeating-linear-gradient(45deg, transparent 0 6px, rgba(150,180,220,0.03) 6px 7px),
    #080c14;
  color: var(--fg-3);
}
.slot-u {
  font-family: var(--font-mono); font-size: 9px; color: var(--fg-3); text-align: center;
  letter-spacing: 0.06em;
}
.slot-type {
  font-family: var(--font-mono); font-size: 9px; color: var(--fg-2);
  letter-spacing: 0.14em; text-transform: uppercase;
}
.slot-type.server   { color: var(--accent); }
.slot-type.switch   { color: var(--violet); }
.slot-type.storage  { color: var(--ok); }

.slot-body {
  display: flex; flex-direction: column; gap: 3px; min-width: 0;
}
.slot-name { font-family: var(--font-mono); font-size: 10px; color: var(--fg-0); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.ports {
  display: grid;
  gap: 2px;
  grid-auto-flow: row;
}
.port {
  width: 8px; height: 8px;
  border: 1px solid var(--fg-3);
  border-radius: 1px;
  background: transparent;
  transition: all .2s ease;
  position: relative;
}
.port.connected {
  background: var(--ok);
  border-color: var(--ok);
  box-shadow: 0 0 4px rgba(0,217,163,0.6);
}
.port.suspicious {
  background: var(--warn);
  border-color: var(--warn);
  animation: port-blink calc(1.2s / var(--anim-speed)) ease-in-out infinite;
}
@keyframes port-blink {
  0%, 100% { opacity: 1; box-shadow: 0 0 4px rgba(245,180,84,0.6); }
  50%      { opacity: 0.3; box-shadow: 0 0 0 rgba(245,180,84,0); }
}

.psw {
  width: 28px; height: 34px;
  border: 1px solid var(--line-soft);
  border-radius: 2px;
  position: relative;
  background: #07090e;
  cursor: pointer;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 2px;
  z-index: 2;
}
.psw-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--fg-3);
  transition: all .25s ease;
}
.psw-lbl { font-family: var(--font-mono); font-size: 7px; color: var(--fg-3); letter-spacing: 0.1em; }
.psw.on .psw-lbl { color: var(--electric); }
.psw.on {
  border-color: var(--electric);
  background: radial-gradient(circle at center, rgba(255,214,74,0.18), #0a0c08);
  box-shadow:
    inset 0 0 6px rgba(255,214,74,0.35),
    0 0 8px rgba(255,214,74,0.4);
  animation: psw-flicker calc(2.4s / var(--anim-speed)) ease-in-out infinite;
}
@keyframes psw-flicker {
  0%, 100% { box-shadow: inset 0 0 6px rgba(255,214,74,0.35), 0 0 8px rgba(255,214,74,0.4); }
  50%      { box-shadow: inset 0 0 10px rgba(255,244,176,0.5), 0 0 14px rgba(255,214,74,0.6); }
}

/* Rack internal DC rail (left side) */
.rack-rail {
  position: absolute;
  left: 12px; top: 42px; bottom: 10px;
  width: 3px;
  background: var(--line-faint);
  border-radius: 1px;
}
.rack-rail.on {
  background: linear-gradient(180deg, rgba(255,214,74,0.5), rgba(255,214,74,0.2));
  box-shadow: 0 0 6px rgba(255,214,74,0.35);
}
.rack-rail-flow {
  position: absolute; left: -2px; width: 7px; height: 7px;
  background: radial-gradient(circle, #fff4b0 0%, var(--electric) 45%, transparent 75%);
  border-radius: 50%;
  filter: drop-shadow(0 0 5px var(--electric));
  animation: rail-flow calc(1.8s / var(--anim-speed)) linear infinite;
}
@keyframes rail-flow {
  0%   { top: -6px; opacity: 0; }
  10%  { opacity: 1; }
  90%  { opacity: 1; }
  100% { top: 100%; opacity: 0; }
}

/* Per-slot feed: horizontal branch from the rail to the power switch */
.slot-feed {
  position: absolute;
  left: -38px; top: 50%; width: 38px; height: 2px;
  transform: translateY(-50%);
  background: var(--line-faint);
  border-radius: 1px;
  pointer-events: none;
}
.slot-feed.on {
  background: linear-gradient(90deg, var(--electric) 0%, rgba(255,214,74,0.6) 100%);
  box-shadow: 0 0 4px rgba(255,214,74,0.4);
}
.slot-feed::before {
  content: "";
  position: absolute; top: -2px; left: -3px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--fg-3);
}
.slot-feed.on::before {
  background: var(--electric-hot);
  box-shadow: 0 0 6px var(--electric);
}
.slot-feed-arc {
  position: absolute; top: -1px; left: 0;
  width: 6px; height: 4px;
  background: radial-gradient(ellipse at center, var(--electric-hot) 0%, var(--electric) 40%, transparent 70%);
  filter: drop-shadow(0 0 3px var(--electric));
  border-radius: 50%;
  animation: slot-arc calc(0.9s / var(--anim-speed)) linear infinite;
}
@keyframes slot-arc {
  0%   { left: 0;   opacity: 0; transform: scaleX(0.6); }
  15%  { opacity: 1; }
  85%  { opacity: 1; }
  100% { left: calc(100% - 6px); opacity: 0; transform: scaleX(1.2); }
}

/* Rack side panel */
.rack-side {
  border-left: 1px solid var(--line-soft);
  background: linear-gradient(180deg, var(--bg-1), var(--bg-0));
  padding: 18px; overflow-y: auto;
  display: flex; flex-direction: column; gap: 16px;
}
.rack-back-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 12px; border: 1px solid var(--line-faint);
  border-radius: 2px; color: var(--fg-1);
  font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase;
  align-self: flex-start;
  transition: all .2s;
}
.rack-back-btn:hover { color: var(--accent); border-color: var(--accent); }

.stat-row { display: flex; justify-content: space-between; align-items: baseline; padding: 6px 0; border-bottom: 1px dashed var(--line-faint); }
.stat-row:last-child { border-bottom: none; }
.stat-row .k { font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--fg-2); }
.stat-row .v { font-family: var(--font-mono); font-size: 13px; color: var(--fg-0); }
.stat-row.ok   .v { color: var(--ok);   }
.stat-row.warn .v { color: var(--warn); }
.stat-row.bad  .v { color: var(--bad);  }

/* ============================================================
   Config view
   ============================================================ */
.cfg-wrap {
  position: absolute; inset: 0;
  display: grid;
  grid-template-columns: 320px 1fr 320px;
  overflow: hidden;
}
.cfg-col {
  border-right: 1px solid var(--line-soft);
  background: var(--bg-1);
  overflow-y: auto;
  padding: 18px;
  display: flex; flex-direction: column; gap: 18px;
}
.cfg-col.right { border-right: none; border-left: 1px solid var(--line-soft); }
.cfg-main {
  position: relative; overflow: hidden;
  background: var(--bg-0);
}
.cfg-main .bp-grid { --grid-size: 32px; }

.field { display: flex; flex-direction: column; gap: 6px; }
.field-label {
  display: flex; align-items: center; justify-content: space-between;
  font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--fg-2);
}
.field-label .v { font-family: var(--font-mono); color: var(--accent); letter-spacing: 0; font-size: 13px; }
.slider {
  width: 100%; height: 3px; background: var(--bg-3); border-radius: 2px; appearance: none; -webkit-appearance: none;
}
.slider::-webkit-slider-thumb {
  -webkit-appearance: none; width: 14px; height: 14px; border-radius: 50%;
  background: var(--accent); border: 2px solid var(--bg-0);
  box-shadow: 0 0 8px rgba(79,209,255,0.5);
}
.slider::-moz-range-thumb {
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--accent); border: 2px solid var(--bg-0); box-shadow: 0 0 8px rgba(79,209,255,0.5);
}

.segmented { display: flex; border: 1px solid var(--line-faint); border-radius: 2px; overflow: hidden; }
.segmented button {
  flex: 1; padding: 7px 4px; font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--fg-2); background: transparent; transition: all .2s;
}
.segmented button.active { color: var(--accent); background: rgba(79,209,255,0.1); }
.segmented button:hover:not(.active) { color: var(--fg-0); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 9px 12px; border: 1px solid var(--line-faint); border-radius: 2px;
  font-size: 10px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--fg-1);
  transition: all .2s;
}
.btn:hover { color: var(--accent); border-color: var(--accent); background: rgba(79,209,255,0.05); }
.btn.primary { color: var(--accent); border-color: var(--accent); background: rgba(79,209,255,0.08); }
.btn.danger:hover { color: var(--bad); border-color: var(--bad); background: rgba(255,84,112,0.06); }

.btn-row { display: flex; gap: 8px; }
.btn-row > * { flex: 1; }

/* Editor canvas */
.cfg-canvas { position: absolute; inset: 0; }
.cfg-toolbar {
  position: absolute; top: 18px; left: 18px; right: 18px;
  display: flex; gap: 8px; justify-content: space-between; align-items: center;
  z-index: 5;
}
.cfg-mode-pill {
  display: inline-flex; gap: 0;
  border: 1px solid var(--line-soft); background: rgba(10,15,24,0.8); backdrop-filter: blur(8px);
  border-radius: 2px; overflow: hidden;
}
.cfg-mode-pill button {
  padding: 8px 14px; font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--fg-2);
}
.cfg-mode-pill button.active { color: var(--accent); background: rgba(79,209,255,0.12); }
.cfg-hint {
  font-family: var(--font-mono); font-size: 10px; color: var(--fg-3);
  background: rgba(10,15,24,0.8); backdrop-filter: blur(8px);
  padding: 8px 10px; border: 1px solid var(--line-faint); border-radius: 2px;
}

.cfg-editor-svg { position: absolute; inset: 0; }

/* Rack editor (inside config right col) */
.slot-picker {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 4px; margin-top: 6px;
}
.slot-picker button {
  padding: 6px 2px; border: 1px solid var(--line-faint); border-radius: 2px;
  font-family: var(--font-mono); font-size: 9px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--fg-2);
}
.slot-picker button.active { color: var(--accent); border-color: var(--accent); background: rgba(79,209,255,0.08); }

.rack-mini {
  display: flex; flex-direction: column; gap: 3px;
  padding: 8px; border: 1px solid var(--line-faint); border-radius: 2px;
  background: #080c14;
}
.rack-mini-row {
  display: flex; align-items: center; gap: 6px;
  padding: 5px 7px; background: #0c1420; border: 1px solid var(--line-faint); border-radius: 2px;
  font-family: var(--font-mono); font-size: 9px; color: var(--fg-2);
  cursor: pointer;
  transition: all .2s;
}
.rack-mini-row.sel { border-color: var(--accent); background: rgba(79,209,255,0.08); color: var(--accent); }
.rack-mini-row:hover { border-color: var(--line-hard); }
.rack-mini-row .u { color: var(--fg-3); width: 16px; }
.rack-mini-row .tp { flex: 1; }
.rack-mini-row .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--fg-3); }
.rack-mini-row.on .dot { background: var(--pulse); box-shadow: 0 0 4px var(--pulse); }

/* ============================================================
   Tooltip
   ============================================================ */
.tip {
  position: fixed;
  pointer-events: none;
  z-index: 999;
  padding: 8px 10px;
  background: rgba(5,8,14,0.95);
  border: 1px solid var(--line-soft);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--fg-0);
  letter-spacing: 0.04em;
  box-shadow: 0 8px 24px rgba(0,0,0,0.6);
  min-width: 120px;
}
.tip .t-k { color: var(--fg-2); font-size: 9px; text-transform: uppercase; letter-spacing: 0.14em; }
.tip .t-row { display: flex; justify-content: space-between; gap: 12px; padding: 2px 0; }

/* ============================================================
   Scrollbars
   ============================================================ */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--line-faint); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--line-soft); }

/* ============================================================
   View transitions
   ============================================================ */
.view-enter {
  animation: view-in calc(0.5s / var(--anim-speed)) ease-out both;
}
@keyframes view-in {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 900px) {
  .app {
    grid-template-columns: 1fr;
    grid-template-rows: 48px 1fr 56px;
  }
  .hud { grid-template-columns: 48px 1fr auto; }
  .rail {
    grid-row: 3 / 4;
    grid-column: 1 / -1;
    flex-direction: row;
    padding: 0;
    border-right: none;
    border-top: 1px solid var(--line-soft);
  }
  .rail-btn { flex: 1; height: 100%; }
  .rail-spacer, .rail-meta { display: none; }
  .main { grid-column: 1 / -1; }

  .floor-wrap, .rack-wrap { grid-template-columns: 1fr; }
  .floor-side, .rack-side { display: none; }

  .cfg-wrap { grid-template-columns: 1fr; grid-template-rows: auto 300px auto; }
  .cfg-col { max-height: 40vh; }
  .cfg-col.right { border-left: none; border-top: 1px solid var(--line-soft); }

  .hud-stats { display: none; }
}