.vm-context-demo, .vm-context-practice { margin: 1.75rem 0 2rem; padding: clamp(1rem, 3vw, 1.75rem); border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); }
.prose .vm-context-demo h3, .prose .vm-context-practice h3 { margin: 0 0 1rem; font-size: 1.3rem; line-height: 1.4; }
.vm-context-demo > input { width: 1.5rem; height: 1.5rem; margin: .5rem .5rem .5rem 0; vertical-align: middle; accent-color: var(--ink); }
.vm-context-demo > label { display: inline-block; min-height: 44px; padding: .5rem 0; vertical-align: middle; font-weight: 750; font-size: 1rem; cursor: pointer; }
.vm-context-comparison { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; margin: 1rem 0; }
.vm-context-panel { min-width: 0; text-align: center; }
.vm-context-panel > span { display: block; margin-bottom: .5rem; font-weight: 800; font-size: 1rem; }
.vm-context-board { min-height: 8rem; display: flex; align-items: center; justify-content: center; }
.vm-context-board-a { background: #252525; }
.vm-context-board-b { background: #e5e5e5; }
.vm-context-sample { display: block; flex: 0 0 2.5rem; width: 2.5rem; height: 2.5rem; background: #808080; }
.vm-context-demo > input:checked ~ .vm-context-comparison .vm-context-board { background: #bcbcbc; }
.vm-context-equal { display: none; }
.vm-context-demo > input:checked ~ .vm-context-distinct { display: none; }
.vm-context-demo > input:checked ~ .vm-context-equal { display: block; }
.prose .vm-context-note { font-size: 1rem; margin-bottom: 0; }
.vm-context-kicker { display: inline-block; margin-bottom: .75rem; color: var(--ink); background: var(--mint); border-radius: 6px; padding: .25rem .6rem; font-size: .9rem; font-weight: 800; }
.vm-context-practice li { padding-left: .15rem; }
.vm-context-practice .button { max-width: 100%; white-space: normal; text-align: center; }
.vm-context-practice details { margin-top: 1.5rem; border-top: 1px solid var(--line); }
.vm-context-practice summary { cursor: pointer; padding: 1rem 0; min-height: 44px; font-weight: 750; font-size: 1rem; }
.vm-context-demo > input:focus-visible, .vm-context-practice summary:focus-visible, .vm-context-return a:focus-visible { outline: 3px solid var(--ink); outline-offset: 4px; }
.vm-context-return { margin: 1rem 0 0; font-size: 1rem; }
.vm-context-return a { display: inline-block; min-height: 44px; padding: .5rem 0; font-weight: 700; }
#practica-brillo, #practica-tamano, #contrast-stage-title, #ebbinghaus-stage-title { scroll-margin-top: 120px; }
@media (max-width: 400px) { .vm-context-comparison { gap: .5rem; } }