body {
  background-color: #f5f6f8;
}

.card {
  border: none;
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.08);
}

.speedometer-wrapper {
  display: flex;
  justify-content: center;
  padding: 0.75rem 0 1.5rem;
}

.speedometer {
  position: relative;
  --size: min(340px, 70vw);
  width: var(--size);
  height: var(--size);
  border-radius: 50%;
  background: radial-gradient(circle at 50% 35%, #1f232b 0%, #0b0c10 65%, #050506 100%);
  border: 12px solid #090b0f;
  box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.7),
              0 18px 35px rgba(8, 11, 18, 0.55);
}

.speedometer-compact {
  --size: min(260px, 60vw);
}

.speedometer::after {
  content: "";
  position: absolute;
  inset: 16px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.15);
  box-shadow: inset 0 0 40px rgba(0, 0, 0, 0.6);
}

.speedometer-major-ticks span {
  position: absolute;
  left: 50%;
  top: 43%;
  width: 5px;
  height: calc(var(--size) * 0.12);
  background: linear-gradient(180deg, #ffffff, #adb5bd);
  transform-origin: center bottom;
  transform: translate(-50%, -50%) rotate(var(--angle)) translateY(calc(var(--size) * -0.44));
  border-radius: 4px;
  box-shadow: 0 0 6px rgba(255, 255, 255, 0.3);
}

.speedometer-scale span {
  position: absolute;
  left: 50%;
  top: 50%;
  color: #f1f3f5;
  font-size: 0.8rem;
  font-weight: 600;
  text-shadow: 0 0 8px rgba(0, 0, 0, 0.7);
  transform: translate(-50%, -50%) rotate(var(--angle)) translateY(calc(var(--size) * -0.33)) rotate(calc(-1 * var(--angle)));
}

.speedometer-needle {
  position: absolute;
  bottom: 50%;
  left: 50%;
  width: 8px;
  height: 44%;
  background: linear-gradient(180deg, #f03e3e 0%, #a4161a 70%, transparent 100%);
  border-radius: 999px;
  transform-origin: bottom center;
  transform: translateX(-50%) rotate(-120deg);
  transition: transform 0.15s ease-out;
  box-shadow: 0 0 12px rgba(240, 62, 62, 0.45);
}

.speedometer-center {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: radial-gradient(circle, #ffffff 0%, #cfcfcf 50%, #444 100%);
  border: 3px solid #050505;
  box-shadow: 0 3px 12px rgba(0, 0, 0, 0.6);
  transform: translate(-50%, -50%);
}

.speedometer-inner-gauge {
  position: absolute;
  left: 50%;
  top: 50%;
  width: calc(var(--size) * 0.45);
  height: calc(var(--size) * 0.45);
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.6);
  text-transform: uppercase;
  letter-spacing: 0.15rem;
  transform: translate(-50%, -50%);
  background:
    radial-gradient(circle, rgba(255, 255, 255, 0.06), transparent 70%),
    repeating-conic-gradient(from -120deg, rgba(255, 255, 255, 0.08) 0deg 2deg, transparent 2deg 20deg);
}

.speedometer-inner-gauge::before {
  content: "";
  position: absolute;
  inset: 18%;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.speedometer-value {
  position: absolute;
  bottom: 12%;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  color: #e9ecef;
  text-shadow: 0 0 8px rgba(0, 0, 0, 0.8);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.1rem;
}

.speedometer-value-number {
  font-size: 2rem;
  font-weight: 700;
}

.speedometer-value-unit {
  font-size: 0.85rem;
  letter-spacing: 0.25rem;
  text-transform: uppercase;
  color: #adb5bd;
}

.speed-control {
  padding: 0.75rem;
  border: 1px solid #e4e7ec;
  border-radius: 0.85rem;
  background: #f8f9fb;
}

.speed-step-btn {
  width: 44px;
  height: 44px;
  border-radius: 999px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.speed-target-display .display-value {
  font-size: 1.4rem;
}

.speed-target-display .label {
  display: block;
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 0.05rem;
  text-transform: uppercase;
  color: #6c757d;
}

.form-label-compact {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05rem;
  color: #6c757d;
}

.perturbation-row {
  border: 1px solid #e4e7ec;
  border-radius: 0.85rem;
  padding: 0.75rem;
  background: #fff;
}

.perturbation-field {
  width: 120px;
}

.simulation-speed {
  min-width: 170px;
}

.controller-indicators {
  display: flex;
  gap: 0.35rem;
}

.controller-switches {
  gap: 0.75rem;
}

.controller-switches .form-check {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin-bottom: 0;
}

.controller-switches .form-check-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05rem;
  color: #6c757d;
  font-weight: 600;
}

.controller-switches .form-check-input {
  width: 2.4rem;
  height: 1.2rem;
  cursor: pointer;
}

.controller-light {
  width: 42px;
  height: 42px;
  border-radius: 999px;
  border: 1px solid #d9dee7;
  background: radial-gradient(circle, #ffffff 0%, #dfe4ec 60%, #c5cfdf 100%);
  color: #6c757d;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05rem;
  transition: background 0.2s ease, box-shadow 0.2s ease, color 0.2s ease;
}

.controller-light.active {
  background: radial-gradient(circle, #e03131 0%, #a4161a 70%, #701010 100%);
  color: #fff;
  box-shadow: 0 0 12px rgba(224, 49, 49, 0.6);
}

.log-panel {
  max-height: 260px;
  overflow-y: auto;
  font-family: "JetBrains Mono", "Fira Code", Consolas, monospace;
  white-space: pre;
  background: #0c0d11;
  color: #e9ecef;
  border-radius: 6px;
  padding: 0.75rem;
  border: 1px solid #1f2430;
  box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.35);
}

.min-width-0 {
  min-width: 0;
}

@media (max-width: 991px) {
  .btn-group .btn {
    font-size: 0.85rem;
  }

  .speedometer {
    width: min(300px, 80vw);
  }
}