*{box-sizing:border-box}body{margin:0;min-height:100vh;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);background-size:26px 26px}.wrap{max-width:1060px;margin:0 auto;padding:26px 18px 80px}.top{display:flex;align-items:center;gap:13px;flex-wrap:wrap;margin-bottom:22px}.mark{width:34px;height:34px;border:2px solid var(--accent);border-radius:8px;display:grid;place-items:center;font-weight:800;color:var(--accent);font-family:Georgia,serif;font-size:18px}.brand-name{font-family:Georgia,Times New Roman,serif;font-size:22px;font-weight:700;line-height:1}.tagline{color:var(--muted);font-size:13.5px;margin-top:3px}.themes{display:flex;gap:6px;margin-left:auto;flex-wrap:wrap}.themes button{font-size:12.5px;padding:6px 12px;border-radius:999px;cursor:pointer;border:1px solid var(--line);background:var(--surface);color:var(--muted)}.themes button.on{color:var(--text);border-color:var(--accent);font-weight:600}.studio-link{font-size:13px;color:var(--muted);text-decoration:none;border:1px solid var(--line);padding:6px 12px;border-radius:999px;white-space:nowrap}.studio-link:hover{border-color:var(--accent);color:var(--text)}.studio{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:18px}.card-title{margin:0 0 12px;font-family:Georgia,serif;font-size:17px}.field{display:block;margin-bottom:14px;font-size:13px;color:var(--muted)}.field>span{display:block;margin-bottom:6px;text-transform:uppercase;letter-spacing:.5px;font-size:11px}.field input,.field textarea,.field select{width:100%;border:1px solid var(--line);background:var(--surface2);color:var(--text);padding:10px 12px;border-radius:8px;font-size:14px;outline:none;font-family:inherit}.field input:focus,.field textarea:focus,.field select:focus{border-color:var(--accent)}.range-row{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:8px;background:var(--surface2);border:1px solid var(--line);border-radius:8px;padding:8px 10px}.range-name{flex:1;min-width:90px;font-size:13px;color:var(--text)}.mini{display:flex;flex-direction:column;font-size:10px;color:var(--muted);text-transform:uppercase}.mini input{width:64px;padding:5px 7px;border:1px solid var(--line);background:var(--surface);color:var(--text);border-radius:6px;font-size:13px}.muted{color:var(--muted);font-size:13px}@media (max-width:820px){.studio{grid-template-columns:1fr}}.ask{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:15px}.ask-label{font-size:11.5px;letter-spacing:.6px;text-transform:uppercase;color:var(--muted);margin-bottom:9px}.askrow{display:flex;gap:9px}.askrow input{flex:1;border:1px solid var(--line);background:var(--surface2);color:var(--text);padding:13px 14px;border-radius:9px;font-size:15px;outline:none}.askrow input:focus{border-color:var(--accent)}.askrow button{border:0;background:var(--accent);color:#1a1a1a;font-weight:700;padding:0 20px;border-radius:9px;cursor:pointer;font-size:14px}.askrow button.ghost{background:var(--surface2);color:var(--muted);border:1px solid var(--line);font-weight:600;white-space:nowrap}.askrow button.ghost:hover{border-color:var(--accent);color:var(--text)}.examples{margin-top:13px}.examples select{width:100%;border:1px solid var(--line);background:var(--surface2);color:var(--text);padding:11px 13px;border-radius:9px;font-size:14px;outline:none;cursor:pointer;font-family:inherit}.examples select:focus{border-color:var(--accent)}.thinking{padding:48px;text-align:center;color:var(--muted);font-size:16px;animation:pulse 1.2s ease-in-out infinite}@keyframes pulse{0%,to{opacity:.55}50%{opacity:1}}.grid{display:grid;grid-template-columns:1.25fr .9fr;gap:16px;margin-top:20px}.reveal{animation:rise .35s ease both}@keyframes rise{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.card{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:16px}.card-head{display:flex;align-items:center;gap:10px;margin-bottom:11px}.card-head h3{margin:0;font-family:Georgia,serif;font-size:17px;font-weight:700}.badge{margin-left:auto;font-size:11px;color:var(--accent2);border:1px solid var(--line);padding:4px 9px;border-radius:999px;white-space:nowrap}.stage{background:var(--surface2);border:1px solid var(--line);border-radius:9px;overflow:hidden}.stage.small{margin-bottom:4px}canvas{display:block;width:100%}.ctrl{margin:13px 0 4px}.ctrl .lab{display:flex;justify-content:space-between;font-size:13px;margin-bottom:7px}.ctrl .lab b{color:var(--accent)}input[type=range]{width:100%;accent-color:var(--accent)}.hint{font-size:12px;color:var(--muted);text-align:center;margin-top:6px;font-style:italic}.sim-tools{display:flex;gap:8px;margin-top:12px}.sim-tools button{flex:1;background:var(--surface2);border:1px solid var(--line);color:var(--text);padding:8px 10px;border-radius:8px;cursor:pointer;font-size:13px;transition:border-color .15s}.sim-tools button:hover{border-color:var(--accent)}.explain{margin-top:14px;line-height:1.62;font-size:14.5px}.eq{background:var(--surface2);border:1px solid var(--line);border-radius:9px;padding:11px 13px;font-family:Georgia,serif;color:var(--accent2);font-size:15px;text-align:center;margin:0 0 12px}.toolbar{display:flex;gap:8px;margin-top:14px}.toolbar button{flex:1;background:var(--surface2);border:1px solid var(--line);color:var(--text);padding:9px 12px;border-radius:9px;cursor:pointer;font-size:13.5px;transition:border-color .15s}.toolbar button:hover{border-color:var(--accent)}.quiz{margin-top:16px;border-top:1px solid var(--line);padding-top:14px}.quiz-q{font-size:14px;font-weight:600;margin-bottom:10px}.quiz-opts{display:flex;flex-direction:column;gap:7px}.quiz-opt{text-align:left;background:var(--surface2);border:1px solid var(--line);color:var(--text);padding:10px 12px;border-radius:8px;cursor:pointer;font-size:13.5px}.quiz-opt:hover:not(.done){border-color:var(--accent)}.quiz-opt.done{cursor:default}.quiz-opt.right{border-color:var(--good);color:var(--good);font-weight:700;box-shadow:inset 0 0 0 1px var(--good)}.quiz-opt.right:after{content:" ✓";font-weight:700}.quiz-opt.wrong{border-color:#d9776b;color:#d9776b;font-weight:700}.quiz-opt.wrong:after{content:" ✗";font-weight:700}.quiz-opt.celebrate{animation:pop .4s ease}@keyframes pop{0%{transform:scale(1)}40%{transform:scale(1.06)}to{transform:scale(1)}}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0000008c;display:none;align-items:center;justify-content:center;padding:20px;z-index:50}.modal-overlay.show{display:flex;animation:fade .2s ease}@keyframes fade{0%{opacity:0}to{opacity:1}}.modal{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:20px;width:100%;max-width:460px;box-shadow:0 20px 60px #00000073}.modal-head{display:flex;align-items:center;justify-content:space-between}.modal-head h3{margin:0;font-family:Georgia,serif;font-size:18px}.modal-x{background:none;border:0;color:var(--muted);font-size:24px;line-height:1;cursor:pointer;padding:0 4px}.modal-x:hover{color:var(--text)}.modal-sub{color:var(--muted);font-size:13px;line-height:1.5;margin:8px 0 14px}.modal-link{display:flex;gap:8px}.modal-link input{flex:1;border:1px solid var(--line);background:var(--surface2);color:var(--text);padding:10px 12px;border-radius:8px;font-size:13px;outline:none}.modal-link button{border:0;background:var(--accent);color:#1a1a1a;font-weight:700;padding:0 16px;border-radius:8px;cursor:pointer}.modal-actions{display:flex;gap:8px;margin-top:12px}.modal-actions .ghost{flex:1;background:var(--surface2);border:1px solid var(--line);color:var(--text);padding:9px;border-radius:8px;cursor:pointer;font-size:13px}.modal-actions .ghost:hover{border-color:var(--accent)}.quiz-why{margin-top:10px;font-size:13px;color:var(--muted);line-height:1.55}.toast{position:fixed;left:50%;bottom:26px;transform:translate(-50%) translateY(20px);background:var(--text);color:var(--bg);padding:10px 18px;border-radius:999px;font-size:13.5px;font-weight:600;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s}.toast.show{opacity:1;transform:translate(-50%) translateY(0)}@media (max-width:820px){.grid{grid-template-columns:1fr}.tagline{display:none}}