/* STEM Learning (.lv-*) and Code Master (.cm-*) */
.learn-hero{--h1:#06a77d;--h2:#4c3bcf}
.lv-tabs{display:flex;gap:10px;overflow-x:auto;padding:14px 0 4px;scrollbar-width:none}
.lv-tabs::-webkit-scrollbar{display:none}
.lv-tabs a{flex:none;display:flex;flex-direction:column;gap:2px;border:2px solid rgba(27,42,87,.12);border-radius:16px;padding:9px 16px;text-decoration:none;background:var(--card);color:var(--head);box-shadow:var(--shadow)}
.lv-tabs a small{color:var(--muted);font-weight:700;font-size:.8rem}
.lv-tabs a.on{background:var(--c);border-color:var(--c);color:#fff}
.lv-tabs a.on small{color:rgba(255,255,255,.85)}
.lv-filter{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0 6px}
.lv-filter a{border:2px solid rgba(27,42,87,.12);border-radius:999px;padding:4px 13px;font-weight:800;font-size:.86rem;text-decoration:none;color:var(--head);background:var(--card)}
.lv-filter a.on{background:var(--navy);border-color:var(--navy);color:#fff}
.lv-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px;margin:14px 0 8px}
.lv-card{display:flex;flex-direction:column;gap:6px;background:var(--card);border-radius:18px;padding:14px 16px;box-shadow:var(--shadow);text-decoration:none;color:var(--text);border-top:5px solid var(--c);transition:transform .15s}
.lv-card:hover{transform:translateY(-3px)}
.lv-card h3{margin:0;color:var(--head);font-size:1.12rem}
.lv-top{display:flex;justify-content:space-between;align-items:center;font-size:.76rem;font-weight:900;letter-spacing:.04em;text-transform:uppercase}
.lv-field{color:var(--c)}.lv-mins{color:var(--muted)}
.lv-wow{margin:0;font-weight:700}
.lv-need{font-size:.84rem;color:var(--muted);font-weight:700}
.lv-go{margin-top:auto;font-weight:900;color:var(--c)}
.lv-more{margin:26px 0 2px}
/* one activity / lesson */
.lv-page{max-width:900px;margin:0 auto;padding:14px 0 10px}
.lv-back{display:inline-block;font-weight:800;text-decoration:none;color:var(--muted);margin-bottom:8px}
.lv-chips{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:6px}
.lv-chips span{background:var(--soft);color:var(--head);border-radius:999px;padding:2px 11px;font-size:.78rem;font-weight:800}
.lv-page h1{margin:2px 0 6px}
.lv-lead{font-size:1.1rem;font-weight:700;color:var(--head)}
.lv-two{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.lv-box{background:var(--card);border-radius:18px;padding:14px 16px;box-shadow:var(--shadow);margin:12px 0}
.lv-box h2{margin:0 0 6px;font-size:1.15rem}
.lv-box.why{background:linear-gradient(135deg,rgba(255,214,102,.18),rgba(123,92,255,.12));border:1.5px solid rgba(255,183,3,.35)}
.lv-steps{margin:0;padding-left:20px}.lv-steps li{margin:6px 0}
.lv-safe{background:#fff0f0;border:1.5px solid #ffb3b3;color:#b23b3b;border-radius:12px;padding:6px 10px;font-weight:800;margin:8px 0 0}
[data-theme=dark] .lv-safe{background:rgba(255,77,77,.12)}
@media (max-width:760px){.lv-two{grid-template-columns:1fr}.lv-grid{grid-template-columns:1fr}}

/* ---------------- Code Master playground ---------------- */
.cm{display:grid;grid-template-columns:1.15fr .85fr;gap:14px;margin:16px 0}
.cm-stagebox,.cm-editbox{background:var(--card);border-radius:18px;padding:12px;box-shadow:var(--shadow)}
.cm-canvas{position:relative;border-radius:14px;overflow:hidden;background:#fff;border:1.5px solid rgba(27,42,87,.12)}
.cm-canvas canvas{display:block;width:100%;height:auto}
.cm-overlay{position:absolute;inset:0;pointer-events:none}
.cm-out{margin-top:8px;min-height:40px;border-radius:12px;padding:8px 12px;background:var(--soft);font-weight:700;color:var(--head)}
.cm-out.good{background:rgba(6,214,160,.16)}
.cm-out.bad{background:rgba(255,77,77,.14)}
.cm-bar{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:8px}
.cm-bar .btn{padding:8px 16px}
.cm-speed{display:flex;align-items:center;gap:6px;margin-left:auto;font-size:1.05rem}
.cm-speed input{width:110px}
.cm-edithead{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px;color:var(--head)}
.cm-mini{border:0;background:var(--soft);color:var(--head);border-radius:999px;padding:4px 10px;font:inherit;font-weight:800;cursor:pointer}
#cmCode{width:100%;border:1.5px solid rgba(27,42,87,.15);border-radius:12px;padding:10px 12px;font-family:'Cascadia Code',Consolas,monospace;font-size:.95rem;line-height:1.5;background:#fbfcff;color:#1b2a57;resize:vertical}
[data-theme=dark] #cmCode{background:#131a33;color:#dfe5ff;border-color:rgba(255,255,255,.14)}
.cm-palette{margin-top:10px;display:grid;gap:8px;max-height:260px;overflow:auto}
.cm-grp h4{margin:0 0 4px;font-size:.78rem;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.cm-grp div{display:flex;flex-wrap:wrap;gap:6px}
.cm-blk{border:2px solid rgba(123,92,255,.28);background:var(--card);color:var(--head);border-radius:999px;padding:5px 11px;font:inherit;font-weight:800;font-size:.84rem;cursor:pointer}
.cm-blk:hover{border-color:var(--grape);color:var(--grape)}
.cm-code{background:#131a33;color:#dfe5ff;border-radius:12px;padding:10px 14px;overflow:auto;font-family:'Cascadia Code',Consolas,monospace;font-size:.92rem;line-height:1.55}
.cm-words{display:grid;grid-template-columns:auto 1fr;gap:4px 12px;margin:0}
.cm-words dt{font-weight:900;color:var(--head)}.cm-words dd{margin:0}
.cm-chal{background:rgba(255,214,102,.2);border-left:5px solid var(--sun2);border-radius:0 12px 12px 0;padding:8px 12px;font-weight:700}
.cm-sol{margin:10px 0}
.cm-sol summary{cursor:pointer;font-weight:800;color:var(--head)}
.cm-target{border-radius:16px;border:1.5px solid rgba(27,42,87,.12);background:#fff;max-width:100%;height:auto}
.cm-help{color:var(--muted);font-weight:700;font-size:.9rem}
@media (max-width:900px){.cm{grid-template-columns:1fr}.cm-palette{max-height:none}}
/* pictures that explain */
.cm-pair{display:grid;grid-template-columns:1fr 340px;gap:12px;align-items:start}
.cm-pic{margin:0;text-align:center}
.cm-pic img{width:100%;height:auto;border-radius:14px;border:1.5px solid rgba(27,42,87,.12);background:#fff}
.cm-pic figcaption{font-size:.82rem;color:var(--muted);font-weight:800;margin-top:4px}
.cm-pic.wide{max-width:460px;margin:0 auto 10px}
.lv-thumb{width:100%;height:auto;border-radius:12px;background:#fff;border:1px solid rgba(27,42,87,.1)}
.lv-fig{margin:12px 0 0}
.lv-fig img{width:100%;height:auto;border-radius:16px;border:1.5px solid rgba(27,42,87,.12);background:#fff}
.lv-fig figcaption{font-size:.85rem;color:var(--muted);font-weight:800;margin-top:6px;text-align:center}
@media (max-width:900px){.cm-pair{grid-template-columns:1fr}}