/* the prototype-only options bar + variant plumbing (not part of the site) */
.opt > [data-variant][hidden] { display: none !important; }
.opt > [data-variant] { position: relative; }
.opt-ribbon { display: none; }
html.opt-all .opt > [data-variant] { border: 1px dashed rgba(255,94,58,.45); padding: 1rem; margin: 0 0 1.5rem; border-radius: 6px; }
html.opt-all .opt-ribbon { display: block; position: absolute; top: -0.7rem; left: 0.75rem; background: #0c0c0d; color: #ff5e3a; font: 500 0.7rem ui-monospace, Menlo, monospace; letter-spacing: .08em; padding: 0 .4rem; text-transform: uppercase; }
#optbar { position: fixed; right: 14px; bottom: 14px; z-index: 1000; background: rgba(20,20,23,.96); border: 1px solid #26262b; border-radius: 8px; padding: 10px 12px; font: 11.5px/1.7 ui-monospace, "SF Mono", Menlo, Consolas, monospace; color: #9a9a93; max-width: 360px; box-shadow: 0 12px 40px -12px rgba(0,0,0,.8); }
#optbar[hidden] { display: none; }
#optbar .row { display: flex; gap: 6px; align-items: baseline; white-space: nowrap; }
#optbar .row b { color: #edece8; font-weight: 500; min-width: 6.5em; }
#optbar button { background: transparent; border: 1px solid #26262b; color: #9a9a93; border-radius: 3px; padding: 0 6px; font: inherit; cursor: pointer; line-height: 1.5; }
#optbar button:hover { border-color: #9a9a93; color: #edece8; }
#optbar button.on { border-color: #ff5e3a; color: #ff5e3a; }
#optbar .foot { margin-top: 6px; padding-top: 6px; border-top: 1px solid #26262b; display: flex; gap: 8px; }
#optbar .foot a { color: #80807a; border: 0; cursor: pointer; }
#optbar .foot a:hover { color: #ff5e3a; }
/* the footer's engine line (site, not prototype-only) */
footer .engine-line { font-size: 0.72rem; color: var(--faint); white-space: nowrap; }
footer .engine-line b { color: var(--accent); font-weight: 500; }
footer .engine-line code { color: var(--dim); font-size: 0.95em; }
footer #engine.ok { color: var(--pos); }
footer #engine.bad { color: var(--warn); }
@media (max-width: 900px) { footer .engine-line { display: none; } }