.rt{--rt-card-bg:#fff;--rt-surface:var(--palest-green);--rt-surface-2:#fff;--rt-border:var(--lightest-green);--rt-board:#04140b;--rt-text:var(--darker-green);--rt-muted:#5f8a5f;--rt-btn-bg:var(--brand-green);--rt-btn-fg:#fff;--rt-ghost-bg:#fff;--rt-ghost-fg:var(--dark-green);--rt-accent:var(--lighter-green);--rt-accent-fg:#04140b;--rt-stats-bg:var(--darker-green);--rt-stats-fg:var(--palest-green);margin:1.25rem 0;border:1px solid var(--rt-border);border-radius:14px;overflow:hidden;background:var(--rt-card-bg);box-shadow:0 6px 20px rgba(0,44,0,.12);-webkit-user-select:none;user-select:none}@media(prefers-color-scheme:dark){.rt{--rt-card-bg:#06110b;--rt-surface:#0b1a11;--rt-surface-2:#081410;--rt-border:#204a20;--rt-text:var(--lightest-green);--rt-btn-bg:var(--light-green);--rt-btn-fg:var(--palest-green);--rt-ghost-bg:#0a160e;--rt-ghost-fg:var(--lightest-green);--rt-stats-bg:#02100a;--rt-stats-fg:var(--lightest-green);box-shadow:0 6px 24px rgba(0,0,0,.6)}}.rt-toolbar{display:flex;flex-wrap:wrap;gap:10px 14px;align-items:center;padding:12px 14px;background:var(--rt-surface);border-bottom:1px solid var(--rt-border)}.rt-btn{display:inline-flex;align-items:center;gap:6px;cursor:pointer;background:var(--rt-ghost-bg);color:var(--rt-ghost-fg);border:1.5px solid var(--rt-border);font-family:var(--font);font-weight:700;font-size:14px;padding:9px 14px;border-radius:9px;min-height:40px;line-height:1}.rt-btn:hover{background:var(--rt-surface)}.rt-btn--primary{background:var(--rt-btn-bg);color:var(--rt-btn-fg);border-color:transparent;font-size:15px;padding:9px 18px;min-width:116px;justify-content:center}.rt-btn--primary:hover{background:var(--rt-btn-bg);filter:brightness(1.08)}.rt-field{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:700;color:var(--rt-ghost-fg)}.rt-field output{font-family:var(--font-monospace,monospace);min-width:2.5em}.rt-field input[type=range]{accent-color:var(--rt-accent);width:110px}.rt-chips{display:flex;flex-wrap:wrap;gap:8px;padding:10px 14px;background:var(--rt-surface-2);border-bottom:1px solid var(--rt-border)}.rt-chips .rt-chips-label{font-size:12px;font-weight:800;letter-spacing:.04em;text-transform:uppercase;color:var(--rt-muted);align-self:center;margin-right:2px}.rt-chip{border:1.5px solid var(--rt-border);background:var(--rt-ghost-bg);color:var(--rt-ghost-fg);border-radius:20px;padding:6px 13px;font-size:13px;font-weight:700;font-family:var(--font);cursor:pointer;min-height:36px}.rt-chip:hover{border-color:var(--rt-accent)}.rt-chip[aria-pressed=true]{background:var(--rt-accent);color:var(--rt-accent-fg);border-color:var(--rt-accent)}.rt-stage{position:relative;background:var(--rt-board);line-height:0;touch-action:none;aspect-ratio:16/10}.rt-canvas{display:block;width:100%;height:100%;touch-action:none;cursor:grab}.rt-stage.is-drag .rt-canvas{cursor:grabbing}.rt-hint{position:absolute;left:12px;bottom:12px;background:rgba(0,20,8,.72);color:var(--palest-green);font-size:12px;padding:6px 10px;border-radius:8px;font-weight:700;line-height:1.2;pointer-events:none;transition:opacity .4s ease}.rt-hint.is-hidden{opacity:0}.rt-stats{display:flex;flex-wrap:wrap;gap:8px 18px;padding:11px 14px;background:var(--rt-stats-bg);color:var(--rt-stats-fg);font-family:var(--font-monospace,monospace);font-size:13px;line-height:1.2}.rt-stats b{color:#fff;font-weight:700}.rt-loading{display:flex;align-items:center;justify-content:center;gap:12px;min-height:320px;background:var(--rt-board);color:var(--palest-green);font-weight:700;font-size:15px}.rt-spinner{width:22px;height:22px;border-radius:50%;border:3px solid rgba(151,185,147,.35);border-top-color:var(--lighter-green);animation:rt-spin .8s linear infinite}@keyframes rt-spin{to{transform:rotate(360deg)}}@media(prefers-reduced-motion:reduce){.rt-spinner{animation-duration:2s}}.rt-error{padding:24px 16px;text-align:center;color:var(--palest-green);background:var(--rt-board);font-weight:700}.rt-back{margin:0 0 .25rem;font-size:.9rem}.rt-explain{margin:1.25rem 0;padding:14px 18px 18px;border:1px solid var(--lightest-green);border-radius:14px;background:#fff;box-shadow:0 6px 20px rgba(0,44,0,.12)}.rt-explain>summary{cursor:pointer;list-style:none;font-family:var(--font);font-weight:800;font-size:15px;color:var(--darker-green)}.rt-explain>summary::-webkit-details-marker{display:none}.rt-explain>summary::before{content:"\25B8";margin-right:8px;color:#5f8a5f}.rt-explain[open]>summary::before{content:"\25BE"}.rt-explain .highlight{margin:12px 0 0}.rt-explain .highlight>pre{margin:0;border-radius:10px;line-height:1.55}.rt-explain .highlight code span{color:inherit}@media(prefers-color-scheme:dark){.rt-explain{background:#06110b;border-color:#204a20;box-shadow:0 6px 24px rgba(0,0,0,.6)}.rt-explain>summary{color:var(--lightest-green)}}@media(max-width:640px){.rt-btn--primary{flex:1 1 100%}.rt-chips{flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch}.rt-chip{flex:none}.rt-field input[type=range]{width:88px}.rt-hint{font-size:11px;left:8px;bottom:8px}}