:root{--bg: #ffffff;--ink: #1b1b2f;--ink2: #34344f;--muted: #4f4f6e;--lemon: #fff59a;--lemon2: #ffe94d;--line: #d8ce86;--orange: #ff5a2c;--blue: #3d5aff;--green: #2fbf71;--green-text: #178a4c;--red: #d92d43;--pink: #ff3d6e;--gold: #ffc800;--gold-text: #b26a00}*{box-sizing:border-box}html,body{margin:0;background:#f6f6f1;color:var(--ink);font-family:Inter,system-ui,sans-serif;-webkit-tap-highlight-color:transparent}button{font:inherit;color:inherit;cursor:pointer}h1,h2,h3{font-family:Space Grotesk,sans-serif;margin:0}.mono{font-family:JetBrains Mono,monospace}.shell{max-width:440px;margin:0 auto;min-height:100dvh;background:var(--bg);position:relative;isolation:isolate;overflow:clip;display:flex;flex-direction:column}@media (min-width: 480px){.shell{box-shadow:0 0 0 2px var(--ink)}}.page{flex:1;padding:20px 20px 24px;display:flex;flex-direction:column;gap:14px;position:relative}.page.pad-top{padding-top:52px}.bubble{position:absolute;border-radius:50%;z-index:-1;pointer-events:none}.card{background:var(--lemon);border:2px solid var(--ink);box-shadow:3px 3px 0 var(--ink);border-radius:16px;padding:14px 16px}.card.white{background:#fff}.card.sel{background:var(--lemon2);box-shadow:4px 4px 0 var(--orange)}.card.dim{opacity:.75}.row{display:flex;align-items:center;gap:12px}.grow{flex:1;min-width:0}.muted{color:var(--muted);font-size:13px}.tiny{font-size:12px;color:var(--muted)}.eyebrow{font-family:JetBrains Mono,monospace;font-size:11px;letter-spacing:.1em;color:var(--muted);text-transform:uppercase}.title{font-size:30px;line-height:1.1;font-weight:700}.h2{font-size:22px;font-weight:700}.err{color:var(--red)}.btn{display:flex;align-items:center;justify-content:center;gap:8px;height:54px;border-radius:16px;background:var(--orange);border:2px solid var(--ink);box-shadow:3px 3px 0 var(--ink);color:var(--ink);font-weight:700;font-size:17px;width:100%;transition:transform .08s,box-shadow .08s}.btn:active{transform:translate(2px,2px);box-shadow:1px 1px 0 var(--ink)}.btn:disabled{background:#e8e6d0;color:#8a8a99;box-shadow:none;cursor:default}.btn.ghost{background:#fff;height:48px;font-size:15px;font-weight:600}.btn.blue{background:var(--blue);color:#fff}.btn.green{background:var(--green)}.btn.small{height:40px;font-size:14px;width:auto;padding:0 14px;border-radius:12px}.chip{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:99px;background:#fff;border:2px solid var(--ink);font-weight:700;font-size:14px}.chip.gold{color:var(--gold-text)}.pill{font-size:11px;font-weight:700;padding:3px 8px;border-radius:99px;background:var(--ink);color:#fff}.pill.orange{background:var(--orange);color:var(--ink)}.pill.soon{background:var(--lemon2);color:var(--ink)}.bar{height:10px;border-radius:99px;background:#fff;border:2px solid var(--ink);overflow:hidden}.bar>i{display:block;height:100%;background:var(--blue);border-radius:99px;transition:width .25s}.bar.green>i{background:var(--green)}.topbar{display:flex;align-items:center;justify-content:space-between;padding:52px 20px 8px;gap:10px}.nav{position:sticky;bottom:0;display:flex;justify-content:space-around;background:var(--lemon);border-top:2px solid var(--ink);padding:8px 4px calc(8px + env(safe-area-inset-bottom));z-index:5}.nav button{background:none;border:0;display:flex;flex-direction:column;align-items:center;gap:3px;font-size:11px;font-weight:600;color:var(--muted);min-width:64px;min-height:44px}.nav button.on{color:var(--ink)}.nav button.on svg{stroke:var(--orange)}.opt{width:100%;text-align:left;background:#fff;border:2px solid var(--ink);border-radius:14px;padding:14px 16px;font-size:16px;font-weight:500;box-shadow:3px 3px 0 var(--ink)}.opt.on{background:var(--lemon2);box-shadow:3px 3px 0 var(--blue);border-color:var(--blue)}.opt.right{background:#c9f3dc;border-color:var(--green-text);box-shadow:3px 3px 0 var(--green-text)}.opt.wrong{background:#ffd9de;border-color:var(--red);box-shadow:3px 3px 0 var(--red)}.opts{display:flex;flex-direction:column;gap:12px}.node{width:56px;height:56px;border-radius:50%;border:2px solid var(--ink);display:flex;align-items:center;justify-content:center;flex:none;background:#fff;box-shadow:3px 3px 0 var(--ink)}.node.done{background:var(--green)}.node.active{background:var(--orange);width:68px;height:68px;box-shadow:0 0 0 6px #ff5a2c40,3px 3px 0 var(--ink)}.node.locked,.node.soon{background:#ecebdc;box-shadow:none;border-color:#b9b79c}.levelhead{display:flex;align-items:center;gap:10px;margin:6px 0}.levelhead span{background:var(--ink);color:#fff;font-family:Space Grotesk,sans-serif;font-weight:700;padding:6px 12px;border-radius:99px;font-size:14px}.levelhead hr{flex:1;border:0;border-top:2px dashed var(--line)}.why{border-left:6px solid var(--green)}.why.bad{border-left-color:var(--red)}.footer{position:sticky;bottom:0;padding:12px 20px calc(16px + env(safe-area-inset-bottom));background:linear-gradient(to top,#fff 70%,#fff0);display:flex;flex-direction:column;gap:10px;z-index:5}.grid3{display:grid;grid-template-columns:1.7fr 1fr 1fr;font-size:13px}.grid3>div{padding:8px 10px;border-top:1px solid var(--line)}.grid3 .h{background:var(--lemon2);font-family:JetBrains Mono,monospace;font-size:11px;border-top:0}.grid3 .r{text-align:right;font-family:JetBrains Mono,monospace}.tile{padding:10px 14px;border-radius:12px;background:#fff;border:2px solid var(--ink);font-weight:600;font-size:13px;box-shadow:2px 2px 0 var(--ink)}.tile.used{background:var(--blue);color:#fff}.formula{border:2px solid var(--blue);border-radius:12px;padding:10px 12px;font-family:JetBrains Mono,monospace;font-size:13px;background:#fff;min-height:42px}.sent{text-align:left;background:transparent;border:0;border-bottom:2px dashed var(--line);padding:8px 4px;font-size:15px;line-height:1.5;width:100%}.sent.on{background:#ff5a2c33;border-bottom:2px solid var(--orange)}.sent.right{background:#c9f3dc;border-bottom-color:var(--green-text)}.sent.wrong{background:#ffd9de;border-bottom-color:var(--red)}select.memo{font:inherit;font-weight:700;border:2px solid var(--ink);border-radius:10px;padding:6px 8px;background:#fff}input[type=range]{width:100%;accent-color:var(--orange);height:32px}.toast{position:fixed;left:50%;bottom:90px;transform:translate(-50%);background:var(--ink);color:#fff;padding:10px 16px;border-radius:12px;font-size:14px;z-index:50;max-width:90vw;text-align:center}.pop{animation:pop .35s ease-out}@keyframes pop{0%{transform:scale(.8);opacity:0}70%{transform:scale(1.06)}to{transform:scale(1);opacity:1}}.spin{width:28px;height:28px;border-radius:50%;border:4px solid var(--lemon2);border-top-color:var(--orange);animation:spin .8s linear infinite;margin:0 auto}@keyframes spin{to{transform:rotate(360deg)}}.center{text-align:center}table.tbl{width:100%;border-collapse:collapse;font-size:14px}table.tbl td{padding:10px 6px;border-top:1px solid var(--line);vertical-align:middle}.content{flex:1;min-width:0;display:flex;flex-direction:column;order:2}.shell.app .nav{order:3}.nav .brand{display:none}.mlogo{padding:14px 20px 0}.mlogo img{display:block;width:138px;height:auto;background:#fff;border:2px solid var(--ink);border-radius:12px;padding:4px 8px;box-shadow:3px 3px 0 var(--ink)}.mlogo+.topbar{padding-top:16px}.cols,.cards2{display:flex;flex-direction:column;gap:14px}.col{display:flex;flex-direction:column;gap:14px;min-width:0}.pathcol{display:flex;flex-direction:column;gap:8px}.linkbtn{background:none;border:0;padding:0;font:inherit;font-weight:700;color:var(--blue);text-decoration:underline;cursor:pointer}.installbar{display:flex;align-items:center;gap:10px}@media (min-width: 900px){.shell{max-width:1180px;margin:24px auto;min-height:calc(100dvh - 48px);border-radius:24px;box-shadow:0 0 0 2px var(--ink),7px 7px 0 var(--ink)}.shell:not(.app) .page,.shell:not(.app) .topbar,.shell:not(.app) .footer{max-width:640px;width:100%;margin-left:auto;margin-right:auto}.shell:not(.app) .page.wide{max-width:980px}.page.pad-top{padding-top:64px}.shell.app{display:grid;grid-template-columns:250px minmax(0,1fr);align-items:start}.shell.app .nav{order:0;position:sticky;top:24px;height:calc(100dvh - 48px);flex-direction:column;justify-content:flex-start;gap:8px;border-top:0;border-right:2px solid var(--ink);padding:28px 16px}.mlogo{display:none}.nav .brand{display:block;margin:0 8px 22px}.nav .brand img{width:200px;height:auto;display:block}.nav .brand i{font-style:normal;color:var(--red)}.nav button{flex-direction:row;justify-content:flex-start;gap:12px;font-size:16px;min-width:0;width:100%;padding:12px 14px;border-radius:14px;border:2px solid transparent}.nav button.on{background:#fff;border-color:var(--ink);box-shadow:3px 3px 0 var(--ink)}.nav button:not(.on):hover{background:#fff9}.content>.topbar,.content>.page{width:100%;max-width:940px;margin-left:auto;margin-right:auto;padding-left:36px;padding-right:36px}.content>.topbar{padding-top:32px}.content>.page{padding-bottom:40px}.cols{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:start}.cards2{display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:start}.pathcol{max-width:420px;margin:0 auto;width:100%}.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}.split-l,.split-r{display:flex;flex-direction:column;gap:22px}.footer{padding-left:0;padding-right:0}}@media (max-width: 899px){.split{display:flex;flex-direction:column;gap:26px;flex:1}.split-l,.split-r{display:flex;flex-direction:column;gap:26px}.split-r{margin-top:auto;gap:12px}}
