/* Laboratório 3D — complementa md.css */
.lab-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(250px, 320px); gap: 20px; align-items: start; }
@media (max-width: 880px) { .lab-layout { grid-template-columns: minmax(0, 1fr); } }
.lab-layout > * { min-width: 0; }
.lab-palco {
  position: relative; width: 100%; aspect-ratio: 4 / 3; max-height: 70vh;
  background: var(--paper-2); border: 1.5px solid var(--ink); border-radius: 18px; overflow: hidden;
  background-image: radial-gradient(var(--line) 1px, transparent 1px); background-size: 18px 18px;
}
@media (max-width: 560px) { .lab-palco { aspect-ratio: 1 / 1; } }
.lab-palco canvas { display: block; width: 100% !important; height: 100% !important; }
.lab-palco:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
.lab-sem3d { padding: 24px; margin: 0; }
.lab-dica { position: absolute; left: 10px; bottom: 8px; font-size: 12.5px; color: var(--ink-2); background: var(--paper); border: 1px solid var(--line); border-radius: 99px; padding: 2px 10px; pointer-events: none; }
.lab-cam { display: flex; flex-wrap: wrap; gap: 6px; margin: 10px 0 0; }
.lab-cam .chip { min-height: 36px; font-size: 14px; }
.tools { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0 0; }
.tools .btn { min-height: 44px; padding: 8px 14px; font-size: 15px; }
.side h3 { font-size: 18px; margin: 0 0 8px; }
.side .panel { padding: 18px; }
.side .grande { font-family: var(--display); font-weight: 800; font-size: 34px; line-height: 1.1; margin: 4px 0 8px; }
.side label { display: block; font-size: 14.5px; font-weight: 500; margin: 12px 0 4px; }
.side input[type=range] { width: 100%; accent-color: var(--ok); }
.side select, .side input[type=number] { width: 100%; min-height: 40px; border: 1.5px solid var(--ink); border-radius: 12px; padding: 4px 10px; background: var(--paper); }
.conta { font-family: ui-monospace, 'Cascadia Mono', Consolas, monospace; font-size: 15px; background: var(--paper); border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; white-space: pre-wrap; margin: 8px 0; }
.leg { list-style: none; padding: 0; margin: 8px 0; font-size: 14.5px; }
.leg li { display: flex; align-items: center; gap: 8px; margin: 4px 0; }
.sw { display: inline-block; width: 14px; height: 14px; border-radius: 3px; border: 1px solid var(--ink); flex: none; }
.prof { margin: 26px 0; }
.prof summary { cursor: pointer; font-weight: 600; font-size: 17px; }
.prof ol, .prof ul { padding-left: 22px; }
.prof li { margin: 4px 0; }
.desafios { counter-reset: d; list-style: none; padding: 0; margin: 8px 0 0; }
.desafios li { border: 1.5px solid var(--ink); border-radius: 14px; padding: 8px 12px; margin: 6px 0; font-size: 14.5px; background: var(--paper); }
.desafios li.ok { background: var(--ok-soft); border-color: var(--ok); }
.desafios li.ok::after { content: ' — concluído'; color: var(--ok); font-weight: 600; }
.seg { display: inline-flex; border: 1.5px solid var(--ink); border-radius: 99px; overflow: hidden; margin: 0 0 12px; flex-wrap: wrap; }
.seg button { border: 0; background: var(--paper); padding: 8px 14px; min-height: 40px; cursor: pointer; font-size: 15px; }
.seg button + button { border-left: 1.5px solid var(--ink); }
.seg button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }