.upb-shell {
  --upb-bg: #eef5ff;
  --upb-panel: rgba(255, 255, 255, 0.84);
  --upb-panel-strong: #fff;
  --upb-ink: #111827;
  --upb-muted: #526072;
  --upb-line: rgba(50, 72, 110, 0.18);
  --upb-glow: #32d19c;
  --upb-accent: #2477ff;
  --upb-hot: #ffbe3d;
  --upb-danger: #ee4b67;
  --upb-shadow: rgba(24, 42, 76, 0.18);

  background:
    radial-gradient(circle at 13% 17%, rgba(50, 209, 156, 0.26), transparent 31%),
    radial-gradient(circle at 86% 18%, rgba(36, 119, 255, 0.24), transparent 28%),
    linear-gradient(135deg, #f8fbff 0%, var(--upb-bg) 48%, #eaf0f8 100%);
  border: 1px solid var(--upb-line);
  border-radius: 8px;
  box-shadow: 0 24px 70px var(--upb-shadow);
  color: var(--upb-ink);
  display: grid;
  gap: 0.8rem;
  overflow: hidden;
  padding: 0.75rem;
  position: relative;
  width: 100%;
}

.upb-shell::before {
  animation: upb-grid-drift 12s linear infinite;
  background:
    linear-gradient(rgba(36, 119, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(36, 119, 255, 0.08) 1px, transparent 1px);
  background-size: 26px 26px;
  content: '';
  inset: 0;
  opacity: 0.42;
  pointer-events: none;
  position: absolute;
}

.theme-dark .upb-shell {
  --upb-bg: #0f1724;
  --upb-panel: rgba(19, 27, 42, 0.82);
  --upb-panel-strong: #141d2e;
  --upb-ink: #f4f8ff;
  --upb-muted: #aab8cb;
  --upb-line: rgba(151, 180, 222, 0.22);
  --upb-glow: #31e6ad;
  --upb-accent: #80aefc;
  --upb-hot: #ffd166;
  --upb-danger: #ff6b87;
  --upb-shadow: rgba(0, 0, 0, 0.42);

  background:
    radial-gradient(circle at 15% 8%, rgba(49, 230, 173, 0.18), transparent 29%),
    radial-gradient(circle at 88% 17%, rgba(128, 174, 252, 0.2), transparent 31%),
    linear-gradient(135deg, #080d19 0%, var(--upb-bg) 55%, #111827 100%);
}

.upb-shell[data-status='tight'] {
  --upb-glow: var(--upb-hot);
  --upb-accent: #f59e0b;
}

.upb-shell[data-status='over'] {
  --upb-glow: var(--upb-danger);
  --upb-accent: #fb7185;
}

.upb-board,
.upb-console {
  backdrop-filter: blur(20px);
  background: var(--upb-panel);
  border: 1px solid var(--upb-line);
  border-radius: 8px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.34);
  position: relative;
  z-index: 1;
}

.upb-board {
  display: grid;
  gap: 0.7rem;
  padding: 0.75rem;
}

.upb-board-top {
  align-items: center;
  display: grid;
  gap: 0.6rem;
  grid-template-columns: 1fr;
}

.upb-eyebrow {
  color: var(--upb-muted);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

.upb-unit-switch {
  background: color-mix(in srgb, var(--upb-panel-strong) 76%, transparent);
  border: 1px solid var(--upb-line);
  border-radius: 8px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding: 0.18rem;
}

.upb-unit-switch button {
  background: transparent;
  border: 0;
  border-radius: 6px;
  color: var(--upb-muted);
  cursor: pointer;
  font: inherit;
  font-size: 0.78rem;
  font-weight: 900;
  min-height: 2rem;
}

.upb-unit-switch button.is-active {
  background: var(--upb-ink);
  color: var(--upb-panel-strong);
}

.theme-dark .upb-unit-switch button.is-active {
  background: var(--upb-glow);
  color: #06110e;
}

.upb-hero {
  align-items: center;
  display: grid;
  gap: 0.45rem;
  grid-template-columns: 1fr;
}

.upb-socket {
  background:
    linear-gradient(145deg, color-mix(in srgb, var(--upb-panel-strong) 88%, transparent), color-mix(in srgb, var(--upb-panel-strong) 56%, transparent)),
    radial-gradient(circle at 20% 20%, color-mix(in srgb, var(--upb-glow) 18%, transparent), transparent 42%);
  border: 1px solid var(--upb-line);
  border-radius: 8px;
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.1);
  display: grid;
  gap: 0.22rem;
  min-height: 5.7rem;
  padding: 0.8rem;
}

.upb-socket span,
.upb-socket small,
.upb-field span,
.upb-metrics span,
.upb-gauge-copy span {
  color: var(--upb-muted);
  font-size: 0.72rem;
  font-weight: 850;
}

.upb-socket strong {
  font-size: clamp(1.8rem, 7vw, 3rem);
  line-height: 0.95;
}

.upb-socket small {
  color: var(--upb-accent);
}

.upb-cable-stage {
  align-items: center;
  display: grid;
  min-height: 9.5rem;
  overflow: hidden;
  position: relative;
}

.upb-cable-stage::before {
  animation: upb-pulse 2.5s ease-in-out infinite;
  background: radial-gradient(circle, color-mix(in srgb, var(--upb-glow) 30%, transparent), transparent 64%);
  content: '';
  height: 10rem;
  left: 50%;
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 18rem;
}

.upb-cable-art {
  filter: drop-shadow(0 18px 24px rgba(15, 23, 42, 0.16));
  height: 100%;
  min-height: 9.5rem;
  overflow: visible;
  position: relative;
  width: 100%;
  z-index: 1;
}

.upb-cable-shadow,
.upb-cable-body,
.upb-cable-core,
.upb-cable-spark {
  fill: none;
  stroke-linecap: round;
}

.upb-cable-shadow {
  opacity: 0.25;
  stroke: #0f172a;
  stroke-width: 38;
}

.upb-cable-body {
  stroke: color-mix(in srgb, var(--upb-ink) 68%, #6b7d96);
  stroke-width: 27;
}

.upb-cable-core {
  filter: url("#upb-glow");
  opacity: 0.72;
  stroke: var(--upb-glow);
  stroke-width: 8;
}

.upb-cable-spark {
  animation: upb-energy 1.25s linear infinite;
  filter: url("#upb-glow");
  stroke: #fff;
  stroke-dasharray: 34 310;
  stroke-width: 5;
}

.upb-plug rect,
.upb-plug circle {
  fill: var(--upb-panel-strong);
  stroke: var(--upb-line);
  stroke-width: 3;
}

.upb-plug line {
  stroke: var(--upb-accent);
  stroke-linecap: round;
  stroke-width: 4;
}

.upb-flow-chip {
  animation: upb-float 3s ease-in-out infinite;
  background: var(--upb-ink);
  border: 1px solid color-mix(in srgb, var(--upb-glow) 45%, transparent);
  border-radius: 999px;
  box-shadow: 0 0 28px color-mix(in srgb, var(--upb-glow) 44%, transparent);
  color: var(--upb-panel-strong);
  font-size: 0.78rem;
  font-weight: 950;
  left: 50%;
  padding: 0.38rem 0.7rem;
  position: absolute;
  top: 48%;
  transform: translate(-50%, -50%);
  z-index: 2;
}

.theme-dark .upb-flow-chip {
  color: #07110f;
  background: var(--upb-glow);
}

.upb-flow-label {
  bottom: 0.1rem;
  color: var(--upb-muted);
  font-size: 0.68rem;
  font-weight: 900;
  left: 50%;
  position: absolute;
  text-transform: uppercase;
  transform: translateX(-50%);
  z-index: 2;
}

.upb-status-row {
  display: grid;
  gap: 0.55rem;
}

.upb-status {
  border: 1px solid color-mix(in srgb, var(--upb-glow) 38%, var(--upb-line));
  border-radius: 8px;
  padding: 0.8rem;
}

.upb-status[data-status='safe'] {
  background: linear-gradient(135deg, rgba(49, 230, 173, 0.18), rgba(36, 119, 255, 0.08));
}

.upb-status[data-status='tight'] {
  background: linear-gradient(135deg, rgba(255, 190, 61, 0.2), rgba(36, 119, 255, 0.06));
}

.upb-status[data-status='over'] {
  background: linear-gradient(135deg, rgba(238, 75, 103, 0.2), rgba(255, 190, 61, 0.08));
}

.upb-status span {
  display: block;
  font-size: clamp(1.35rem, 5vw, 2.25rem);
  font-weight: 950;
  line-height: 1;
}

.upb-status p {
  color: var(--upb-muted);
  margin: 0.35rem 0 0;
}

.upb-gauge {
  background: color-mix(in srgb, var(--upb-panel-strong) 78%, transparent);
  border: 1px solid var(--upb-line);
  border-radius: 8px;
  display: grid;
  gap: 0.45rem;
  padding: 0.75rem;
}

.upb-gauge-copy {
  align-items: baseline;
  display: flex;
  justify-content: space-between;
}

.upb-gauge-copy strong {
  font-size: 1.55rem;
  line-height: 1;
}

.upb-gauge-track {
  background: color-mix(in srgb, var(--upb-ink) 12%, transparent);
  border-radius: 999px;
  height: 0.7rem;
  overflow: hidden;
}

.upb-gauge-track i {
  background: linear-gradient(90deg, var(--upb-glow), var(--upb-accent));
  border-radius: inherit;
  box-shadow: 0 0 18px color-mix(in srgb, var(--upb-glow) 48%, transparent);
  display: block;
  height: 100%;
  max-width: 100%;
  transition: width 220ms ease;
  width: 0;
}

.upb-console {
  align-content: start;
  display: grid;
  gap: 0.55rem;
  padding: 0.65rem;
}

.upb-field,
.upb-field-pair {
  min-width: 0;
}

.upb-field {
  display: grid;
  gap: 0.28rem;
}

.upb-field-pair {
  display: grid;
  gap: 0.55rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.upb-field input,
.upb-field select {
  background: color-mix(in srgb, var(--upb-panel-strong) 82%, transparent);
  border: 1px solid var(--upb-line);
  border-radius: 8px;
  color: var(--upb-ink);
  font: inherit;
  font-weight: 800;
  min-height: 2.35rem;
  padding: 0 0.68rem;
  width: 100%;
}

.upb-field input:focus,
.upb-field select:focus {
  border-color: var(--upb-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--upb-accent) 20%, transparent);
  outline: none;
}

.upb-metrics {
  display: grid;
  gap: 0.45rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.upb-metrics div {
  background: color-mix(in srgb, var(--upb-panel-strong) 78%, transparent);
  border: 1px solid var(--upb-line);
  border-radius: 8px;
  display: grid;
  gap: 0.2rem;
  min-width: 0;
  padding: 0.62rem;
}

.upb-metrics strong {
  font-size: 1.18rem;
  line-height: 1;
}

@keyframes upb-energy {
  to {
    stroke-dashoffset: -344;
  }
}

@keyframes upb-float {
  50% {
    transform: translate(-50%, calc(-50% - 7px));
  }
}

@keyframes upb-pulse {
  50% {
    opacity: 0.42;
    transform: translate(-50%, -50%) scale(1.13);
  }
}

@keyframes upb-grid-drift {
  to {
    background-position: 26px 26px;
  }
}

@media (min-width: 820px) {
  .upb-shell {
    grid-template-columns: minmax(0, 1.45fr) minmax(18rem, 0.75fr);
    padding: 0.9rem;
  }

  .upb-board {
    min-height: 27rem;
  }

  .upb-board-top {
    grid-template-columns: 1fr 15rem;
  }

  .upb-hero {
    grid-template-columns: minmax(9rem, 0.72fr) minmax(17rem, 1.2fr) minmax(9rem, 0.72fr);
  }

  .upb-cable-stage {
    min-height: 14.5rem;
  }

  .upb-cable-art {
    min-height: 14.5rem;
  }

  .upb-status-row {
    grid-template-columns: 1fr minmax(12rem, 0.45fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .upb-shell::before,
  .upb-cable-spark,
  .upb-flow-chip,
  .upb-cable-stage::before {
    animation: none;
  }
}