.tradeoff-app {
  width: min(960px, 94vw);
  margin: 4rem auto;
  display: grid;
  gap: 2.5rem;
}

.tradeoff-header {
  background: var(--color-surface);
  border-radius: 1.5rem;
  padding: 2.5rem 3rem;
  box-shadow: 0 24px 48px rgba(15, 23, 42, 0.08);
  border: 1px solid var(--color-border);
  text-align: center;
}

.tradeoff-header h1 {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 3vw, 2.6rem);
}

.tradeoff-header p {
  margin: 0 auto;
  max-width: 720px;
  line-height: 1.6;
  color: var(--color-muted);
}

.tradeoff-panel {
  display: grid;
  gap: 1.75rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.slider-card {
  background: var(--color-surface-subtle);
  border-radius: 1.35rem;
  padding: 1.75rem;
  border: 1px solid rgba(148, 163, 184, 0.35);
  box-shadow: 0 16px 36px rgba(15, 23, 42, 0.06);
  display: grid;
  gap: 1.25rem;
}

.slider-card header h2 {
  margin: 0 0 0.35rem;
  font-size: 1.45rem;
}

.slider-card header p {
  margin: 0;
  color: var(--color-muted);
  line-height: 1.5;
}

.toggle-control {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 1rem;
}

.tradeoff-toggle {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-visual {
  position: relative;
  display: inline-flex;
  width: 56px;
  height: 30px;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.4);
  transition: background var(--transition-base), box-shadow var(--transition-base);
  cursor: pointer;
  box-shadow: inset 0 0 0 1px rgba(148, 163, 184, 0.35);
}

.toggle-visual::before {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgb(248, 250, 252);
  box-shadow: 0 10px 20px rgba(15, 23, 42, 0.18);
  transition: transform var(--transition-base);
}

.tradeoff-toggle:focus + .toggle-visual {
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.2);
}

.tradeoff-toggle:checked + .toggle-visual {
  background: linear-gradient(90deg, rgba(59, 130, 246, 0.85) 0%, rgba(37, 99, 235, 0.85) 100%);
  box-shadow: 0 10px 24px rgba(37, 99, 235, 0.3);
}

.tradeoff-toggle:checked + .toggle-visual::before {
  transform: translateX(26px);
}

.toggle-state {
  font-weight: 600;
  color: rgba(15, 23, 42, 0.75);
}

.tradeoff-output {
  background: rgba(37, 99, 235, 0.08);
  border-radius: 1.35rem;
  padding: 2rem 2.5rem;
  border: 1px solid rgba(37, 99, 235, 0.25);
  box-shadow: inset 0 0 0 1px rgba(37, 99, 235, 0.12);
  display: grid;
  gap: 1rem;
}

.tradeoff-output h3 {
  margin: 0;
  font-size: 1.35rem;
}

.output-message {
  margin: 0;
  line-height: 1.5;
  font-weight: 500;
}

.output-reset {
  margin: 0;
  color: rgba(15, 23, 42, 0.65);
  font-size: 0.95rem;
}

.tradeoff-explain {
  background: var(--color-surface);
  border-radius: 1.5rem;
  padding: 2.5rem 3rem;
  border: 1px solid var(--color-border);
  box-shadow: 0 24px 48px rgba(15, 23, 42, 0.08);
  display: grid;
  gap: 1.5rem;
}

.tradeoff-explain ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.75rem;
}

.tradeoff-explain li {
  line-height: 1.6;
}

.tradeoff-explain strong {
  display: inline-block;
  margin-right: 0.35rem;
}

.tradeoff-explain p {
  margin: 0;
  line-height: 1.6;
  color: var(--color-muted);
}

@media (max-width: 680px) {
  .tradeoff-header,
  .tradeoff-explain,
  .tradeoff-output {
    padding: 1.75rem;
  }

  .toggle-control {
    grid-template-columns: auto;
    justify-items: start;
  }
}