.math-scratchpad[data-astro-cid-l4g6kouf]{border:1px solid var(--border);background:var(--card-bg);border-radius:14px;margin-top:3rem;padding:1.1rem 1.25rem 1.25rem;box-shadow:0 1px 3px #0000000a}.scratchpad-head[data-astro-cid-l4g6kouf]{justify-content:space-between;align-items:center;margin-bottom:.75rem;font-family:ui-sans-serif,system-ui,sans-serif;display:flex}.scratchpad-title[data-astro-cid-l4g6kouf]{text-transform:uppercase;letter-spacing:.06em;color:var(--muted);font-size:.8rem;font-weight:600}.whiteboard[data-astro-cid-l4g6kouf]{border:1px solid var(--border);background:#fdfdfb;border-radius:10px;flex-direction:column;display:flex;overflow:hidden}.whiteboard[data-astro-cid-l4g6kouf]:fullscreen{border-radius:0;height:100vh}.whiteboard-toolbar[data-astro-cid-l4g6kouf]{background:var(--card-bg);border-bottom:1px solid var(--border);align-items:center;gap:.9rem;padding:.5rem .7rem;display:flex}.whiteboard-group[data-astro-cid-l4g6kouf]{align-items:center;gap:.4rem;display:flex}.whiteboard-swatch[data-astro-cid-l4g6kouf]{border:2px solid var(--border);background:var(--swatch-color);cursor:pointer;border-radius:50%;width:1.35rem;height:1.35rem;padding:0}.whiteboard-swatch[data-astro-cid-l4g6kouf].is-active{border-color:var(--fg);box-shadow:0 0 0 2px var(--card-bg)}.whiteboard-width[data-astro-cid-l4g6kouf]{cursor:pointer;background:0 0;border:1px solid #0000;border-radius:6px;justify-content:center;align-items:center;width:1.6rem;height:1.6rem;display:flex}.whiteboard-width[data-astro-cid-l4g6kouf] span[data-astro-cid-l4g6kouf]{background:var(--muted);border-radius:50%;display:block}.whiteboard-width[data-astro-cid-l4g6kouf].is-active{border-color:var(--accent);background:color-mix(in srgb, var(--accent) 10%, transparent)}.whiteboard-width[data-astro-cid-l4g6kouf].is-active span[data-astro-cid-l4g6kouf]{background:var(--accent)}.whiteboard-eraser[data-astro-cid-l4g6kouf],.whiteboard-clear-toolbar[data-astro-cid-l4g6kouf],.whiteboard-fullscreen[data-astro-cid-l4g6kouf]{border:1px solid var(--border);width:2rem;height:2rem;color:var(--muted);cursor:pointer;background:0 0;border-radius:6px;justify-content:center;align-items:center;font-size:1.05rem;display:flex}.whiteboard-exercises[data-astro-cid-l4g6kouf]{margin-left:auto;position:relative}.whiteboard-exercises-toggle[data-astro-cid-l4g6kouf]{border:1px solid var(--border);height:2rem;color:var(--muted);cursor:pointer;background:0 0;border-radius:6px;align-items:center;gap:.3rem;padding:0 .6rem;font-family:ui-sans-serif,system-ui,sans-serif;font-size:.82rem;display:flex}.whiteboard-exercises-toggle[data-astro-cid-l4g6kouf]:hover,.whiteboard-exercises-toggle[data-astro-cid-l4g6kouf][aria-expanded=true]{color:var(--accent);border-color:var(--accent)}.whiteboard-exercises-menu[data-astro-cid-l4g6kouf]{z-index:20;background:var(--card-bg);border:1px solid var(--border);border-radius:8px;flex-direction:column;gap:.15rem;width:17rem;max-width:80vw;max-height:18rem;padding:.4rem;display:flex;position:absolute;top:calc(100% + .4rem);right:0;overflow-y:auto;box-shadow:0 8px 20px #0000002e}.whiteboard-exercises-menu[data-astro-cid-l4g6kouf][hidden]{display:none}.whiteboard-exercises-empty[data-astro-cid-l4g6kouf]{color:var(--muted);margin:0;padding:.4rem;font-family:ui-sans-serif,system-ui,sans-serif;font-size:.8rem}.whiteboard-eraser[data-astro-cid-l4g6kouf]:hover,.whiteboard-eraser[data-astro-cid-l4g6kouf].is-active,.whiteboard-clear-toolbar[data-astro-cid-l4g6kouf]:hover,.whiteboard-fullscreen[data-astro-cid-l4g6kouf]:hover,.whiteboard-fullscreen[data-astro-cid-l4g6kouf].is-active{color:var(--accent);border-color:var(--accent)}.whiteboard-eraser[data-astro-cid-l4g6kouf].is-active{background:color-mix(in srgb, var(--accent) 12%, transparent)}.whiteboard-canvas-wrap[data-astro-cid-l4g6kouf]{background-image:repeating-linear-gradient(#fdfdfb 0 27px, color-mix(in srgb, var(--muted) 14%, transparent) 27px 28px);flex:auto;min-height:16rem;position:relative;overflow:hidden}.whiteboard[data-astro-cid-l4g6kouf]:fullscreen .whiteboard-canvas-wrap[data-astro-cid-l4g6kouf]{min-height:0}.whiteboard-canvas[data-astro-cid-l4g6kouf]{cursor:none;width:100%;height:100%;display:block}.whiteboard-hint[data-astro-cid-l4g6kouf]{color:var(--muted);pointer-events:none;margin:0;font-family:ui-sans-serif,system-ui,sans-serif;font-size:.85rem;position:absolute;top:.75rem;left:1rem}.scratchpad-result-bar[data-astro-cid-l4g6kouf]{border:1.5px solid var(--accent);background:color-mix(in srgb, var(--accent) 5%, var(--card-bg));border-radius:10px;align-items:center;gap:.6rem;margin-top:1rem;padding:.7rem .8rem;display:flex}.scratchpad-result-label[data-astro-cid-l4g6kouf]{color:var(--accent);white-space:nowrap;font-family:ui-sans-serif,system-ui,sans-serif;font-size:.85rem;font-weight:700}math-field[data-astro-cid-l4g6kouf].scratchpad-result{background:var(--bg);min-width:0;min-height:2.6rem;color:var(--fg);border:1px solid var(--border);border-radius:8px;flex:auto;padding:.3rem .6rem;font-size:1.1rem}math-field[data-astro-cid-l4g6kouf].scratchpad-result::part(virtual-keyboard-toggle),math-field[data-astro-cid-l4g6kouf].scratchpad-result::part(menu-toggle){display:none}.scratchpad-keyboard-toggle[data-astro-cid-l4g6kouf]{border:1px solid var(--accent);background:var(--accent);width:2.6rem;height:2.6rem;color:var(--bg);cursor:pointer;border-radius:50%;flex:none;font-size:1.2rem;line-height:1;transition:transform .12s,opacity .12s}.scratchpad-keyboard-toggle[data-astro-cid-l4g6kouf]:hover{opacity:.88}.scratchpad-keyboard-toggle[data-astro-cid-l4g6kouf]:active{transform:scale(.94)}@media (width<=480px){.scratchpad-result-bar[data-astro-cid-l4g6kouf]{flex-wrap:wrap}math-field[data-astro-cid-l4g6kouf].scratchpad-result{flex-basis:100%;order:3}}.filmstrip[data-astro-cid-hfgxcxc3]{flex-direction:column;align-items:center;gap:.2rem;font-family:ui-sans-serif,system-ui,sans-serif;display:flex}.filmstrip-track[data-astro-cid-hfgxcxc3]{scroll-behavior:auto;cursor:grab;scrollbar-width:none;-ms-overflow-style:none;touch-action:pan-x;user-select:none;align-items:center;gap:.45rem;width:min(100%,21rem);padding-block:.35rem;display:flex;position:relative;overflow-x:auto}.filmstrip-track[data-astro-cid-hfgxcxc3]::-webkit-scrollbar{display:none}.filmstrip[data-astro-cid-hfgxcxc3].is-dragging .filmstrip-track[data-astro-cid-hfgxcxc3]{cursor:grabbing}.filmstrip-edge-spacer[data-astro-cid-hfgxcxc3]{flex:none;width:9.5rem}.filmstrip-card[data-astro-cid-hfgxcxc3]{border:1.5px solid var(--border);background:var(--card-bg);width:2.75rem;height:2.75rem;color:var(--muted);font-variant-numeric:tabular-nums;-webkit-user-drag:none;user-select:none;border-radius:9px;flex:none;justify-content:center;align-items:center;font-size:.95rem;font-weight:600;text-decoration:none;transition:transform .15s,border-color .15s,color .15s,background .15s;display:flex;position:relative}.filmstrip-card[data-astro-cid-hfgxcxc3]:hover{border-color:var(--accent);color:var(--fg)}.filmstrip-card[data-astro-cid-hfgxcxc3].is-current .filmstrip-card-num[data-astro-cid-hfgxcxc3]{color:var(--accent);font-weight:800}.filmstrip-card[data-astro-cid-hfgxcxc3].is-centered{border-color:var(--accent);background:color-mix(in srgb, var(--accent) 14%, var(--card-bg));transform:scale(1.12)}.filmstrip-card-exercise[data-astro-cid-hfgxcxc3]{background:var(--accent);width:1.1rem;height:1.1rem;color:var(--bg);border-radius:50%;justify-content:center;align-items:center;font-size:.6rem;display:flex;position:absolute;top:-.35rem;right:-.35rem}.filmstrip-divider[data-astro-cid-hfgxcxc3]{flex:none;justify-content:center;align-self:stretch;align-items:center;width:1.5rem;display:flex;overflow:hidden}.filmstrip-divider-label[data-astro-cid-hfgxcxc3]{writing-mode:vertical-rl;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);white-space:nowrap;font-size:.62rem;transform:rotate(180deg)}.filmstrip-label[data-astro-cid-hfgxcxc3]{color:var(--muted);text-align:center;min-height:1.2em;margin:0;font-size:.85rem}