:root{--bg: #111;--fg: #fff;--muted: #a0a0a0;--tile: #1f1f1f;--line: #555;--num: #333;--op: #3B82F6;--op-hover: #60A5FA;--op-pressed: #2563EB;--op-focus: rgba(147, 197, 253, .4);--util: #3a3a3a;--ok: #22C55E;--warning: #F59E0B;--err: #EF4444;--accent: #3B82F6;--gap: 20px;--slot-min: 200px;--digitKey: #171B22;--digitKeyActive: #222733;--digitText: #556070;--font-serif: "Latin Modern Roman", "Computer Modern", "STIX Two Text", Georgia, "Times New Roman", Times, serif;--font-mono: "Latin Modern Mono", "Computer Modern Typewriter", "JetBrains Mono", ui-monospace, Menlo, monospace;--font-sans: ui-sans-serif, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;font-family:var(--font-sans);background:var(--bg);color:var(--fg);display:flex;flex-direction:column;align-items:center}body.landing{background:#fff;color:#0c0e10;font-family:var(--font-serif);line-height:1.55;display:flex;flex-direction:row;align-items:stretch;justify-content:center;margin:0;height:100vh;height:100dvh;overflow:hidden;width:100%}body.equator{background:#0c0e10;padding:0;margin:0}header{width:400px;padding:0 16px;margin:0;display:flex;flex-direction:column}.brand{width:100%;display:flex;align-items:center;justify-content:center;padding:20px 0 16px;margin:0;position:relative}.brand>span{font-family:var(--font-serif);font-size:28px;font-weight:700;font-style:italic;line-height:1;color:var(--muted);text-align:center;letter-spacing:.09em}.brand .refresh{position:absolute;right:0}.puzzle{width:100%;padding:0 0 20px;margin:0}.puzzle-center{width:100%;display:flex;align-items:baseline;justify-content:space-evenly;font-size:22px;font-family:var(--font-mono);font-weight:400;letter-spacing:.2rem;color:var(--fg)}.with{font-family:var(--font-serif);font-style:italic;font-size:22px;color:var(--muted);letter-spacing:.09em}.with:before,.with:after{content:"·";margin:0 .35rem;opacity:.7}.refresh{width:32px;height:32px;border:none;background:transparent;color:#ff9f0a;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:24px;line-height:1;border-radius:6px;transition:all .2s ease;padding:4px;flex-shrink:0}.refresh:hover{background:#ff9f0a1a;transform:scale(1.05)}.refresh:active{transform:scale(.95);background:#ff9f0a33}main{width:400px;padding:0 16px 240px;display:flex;flex-direction:column;gap:16px}.results{width:100%;display:grid;grid-template-columns:1fr auto 1fr;gap:8px;min-height:32px;padding:0}.resVal{font-size:18px;font-family:var(--font-mono);color:var(--muted);text-align:center;opacity:.7;min-height:24px;display:flex;align-items:center;justify-content:center}.resVal.ok{color:var(--ok);font-weight:700}.resVal.err{color:var(--err);font-weight:600}.slots{width:100%;display:grid;grid-template-columns:1fr auto 1fr;gap:8px;align-items:center}.slot{min-height:50px;background:var(--tile);border:2px solid var(--line);border-radius:12px;display:flex;align-items:center;justify-content:center;padding:10px 14px;font-size:18px;font-family:var(--font-mono);transition:border-color .15s,box-shadow .15s;cursor:pointer;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.slot.selected{border-color:var(--accent);box-shadow:0 0 0 3px #3b82f626}.slot .placeholder{color:var(--muted)}.slots>.slot:nth-child(1){grid-column:1}.slots>.slot:nth-child(2){grid-column:3}.exprEq{grid-column:2;font-size:25px;font-weight:700;text-align:center;line-height:1;color:var(--muted);white-space:nowrap;flex-shrink:0;position:relative}.game-time{font-size:18px;font-family:var(--font-mono);color:var(--ok);text-align:center;min-height:24px;display:flex;align-items:center;justify-content:center;white-space:nowrap}.exprEq.neutral{color:var(--muted)}.exprEq.not-equal{color:var(--err)}.exprEq.equal{color:var(--ok)}@keyframes charWave{0%{transform:translateY(0);color:inherit;font-weight:400}25%{transform:translateY(-15px);color:var(--ok);font-weight:700}50%{transform:translateY(0);color:var(--ok);font-weight:700}75%{transform:translateY(-8px);color:var(--ok);font-weight:700}to{transform:translateY(0);color:inherit;font-weight:400}}.char-wave{display:inline-block;animation:charWave 1s ease-in-out;animation-fill-mode:both}.slots.matched .slot:first-child{animation:successGlowLeft 1.8s ease-out}.slots.matched .slot:nth-child(2){animation:successGlowRight 1.8s ease-out}.slots.matched .exprEq{animation:successEqualSign 1.8s ease-out}@keyframes successGlowLeft{0%{box-shadow:0 0 #22c55e00;border-color:var(--line);transform:scale(1)}25%{box-shadow:0 0 8px #22c55e26;border-color:var(--ok);transform:scale(1.005)}35%{box-shadow:0 0 12px #22c55e33;border-color:var(--ok);transform:scale(1.005)}50%{box-shadow:0 0 6px #22c55e1f;border-color:var(--ok);transform:scale(1.002)}60%{box-shadow:0 0 #22c55e00;border-color:var(--line);transform:scale(1)}to{box-shadow:0 0 #22c55e00;border-color:var(--line);transform:scale(1)}}@keyframes successEqualSign{0%{color:var(--err)}35%{color:var(--err)}45%{color:var(--ok);text-shadow:0 0 8px rgba(34,197,94,.4)}65%{color:var(--ok);text-shadow:0 0 4px rgba(34,197,94,.3)}to{color:var(--ok);text-shadow:none}}.slots.matched .exprEq:after{content:"";position:absolute;left:-15px;top:50%;width:50px;height:2px;background:linear-gradient(90deg,transparent 0%,rgba(34,197,94,.2) 30%,rgba(34,197,94,.5) 50%,rgba(34,197,94,.2) 70%,transparent 100%);transform:translateY(-50%);animation:claudeGlow 2s ease-in-out;animation-fill-mode:forwards}@keyframes claudeGlow{0%{transform:translateY(-50%) translate(-20px);opacity:0;width:50px;height:2px}50%{transform:translateY(-50%) translate(20px);opacity:1;width:50px;height:2px}to{transform:translateY(-50%) translate(20px);opacity:0;width:0;height:0}}@keyframes successGlowRight{0%{box-shadow:0 0 #22c55e00;border-color:var(--line);transform:scale(1)}55%{box-shadow:0 0 #22c55e00;border-color:var(--line);transform:scale(1)}70%{box-shadow:0 0 8px #22c55e26;border-color:var(--ok);transform:scale(1.005)}80%{box-shadow:0 0 12px #22c55e33;border-color:var(--ok);transform:scale(1.005)}95%{box-shadow:0 0 6px #22c55e1f;border-color:var(--ok);transform:scale(1.002)}to{box-shadow:0 0 #22c55e00;border-color:var(--line);transform:scale(1)}}.pad{width:100%;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:8px}.pad .btn{width:100%;height:50px;border:none;border-radius:25px;font-size:18px;font-family:var(--font-mono);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;-webkit-user-select:none;user-select:none}.pad .btn.num{background:var(--digitKey);color:var(--digitText);font-weight:600;transition:all .2s ease}.pad .btn.num.allowed{color:#fff;background:var(--op);font-weight:700}.pad .btn.num.allowed:hover{background:var(--op-hover)}.pad .btn.num.allowed:active{background:var(--op-pressed)}.pad .btn.num.allowed:focus{box-shadow:0 0 0 3px var(--op-focus)}.pad .btn.num:not(.allowed):active{background:var(--digitKeyActive)}.pad .btn.num[disabled]{background:var(--tile);opacity:.7;filter:none;cursor:not-allowed;color:var(--muted)}.pad .btn.op{background:var(--tile);border:2px solid var(--op);color:#fff;transition:all .2s ease}.pad .btn.op:hover{border-color:var(--op-hover);background:#3b82f61a}.pad .btn.op:active{border-color:var(--op-pressed);background:#3b82f633}.pad .btn.op:focus{box-shadow:0 0 0 3px var(--op-focus)}.pad .btn.op.multiply{line-height:.85;display:flex;align-items:center;justify-content:center}.pad .btn.op.power{background:#ff9f0a;border:2px solid #FF9F0A;color:#111}.pad .btn.op.power:hover{background:#ffb340;border-color:#ffb340}.pad .btn.op.power:active{background:#e68a00;border-color:#e68a00}.pad .btn.op.power:focus{box-shadow:0 0 0 3px #ff9f0a66}.pad .btn.op.backspace{display:flex;align-items:center;justify-content:center;border:none;background:var(--tile)}.pad .btn.op.backspace svg{width:20px;height:20px}.pad .btn.op.util{border:none;background:var(--tile)}@media (max-width: 500px){.pad{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}.pad .btn{height:48px;font-size:16px}:root{--slot-min: 160px}}@keyframes digitReveal{0%{opacity:0;transform:translateY(-6px) scale(.85)}to{opacity:1;transform:translateY(0) scale(1)}}.puzzle-digit{display:inline-block;opacity:.2;color:var(--muted);transition:color .2s}.puzzle-digit.revealed{opacity:1;color:var(--fg);animation:digitReveal .35s ease-out}.annulus-timer,.equate-timer{position:absolute;right:0}.slots.locked,.pad.locked{pointer-events:none;opacity:.45}.wrap{width:100%;max-width:720px;height:100%;padding:0;text-align:center;display:flex;flex-direction:column;overflow:hidden}.wrap-scroll{flex:1;overflow-y:auto;-webkit-overflow-scrolling:touch;padding:48px 20px 16px}.logo-image{width:100px;height:auto;margin:0 auto 14px;display:block}h1{font-family:var(--font-serif);font-size:clamp(36px,5vw,56px);line-height:1.1;color:#0c0e10;margin:0 0 8px;font-weight:700}.subtitle{font-family:var(--font-serif);font-size:18px;margin:0 0 28px;opacity:.85;color:#0c0e10}.card{text-align:left;background:transparent;border:1px solid #94a3b8;border-radius:14px;padding:22px;box-shadow:0 1.5px #0f172a0d inset}.card h2{margin:0 0 12px;text-align:center;font-weight:700;color:#0c0e10;font-family:var(--font-serif);font-size:18px}.card p{font-family:var(--font-serif);margin:10px 0;color:#0c0e10}.card ul{font-family:var(--font-serif);margin:8px 0 12px 18px;padding:0}.card li{font-family:var(--font-serif);margin:6px 0;color:#4b5563}.examples{font-family:var(--font-serif);margin-top:10px;color:#0c0e10;text-align:center}.examples b{font-family:var(--font-mono);color:#0c0e10}.eq{font-family:var(--font-mono);margin:8px 0;color:#0c0e10}.eq b{font-family:var(--font-mono);color:#0c0e10}.actions{display:flex;gap:20px;flex-wrap:wrap;justify-content:center;padding:16px 20px;padding-bottom:max(16px,env(safe-area-inset-bottom))}.actions .btn{flex:1;max-width:280px}.btn{font-family:var(--font-serif);-webkit-appearance:none;-moz-appearance:none;appearance:none;border-radius:999px;padding:12px 22px;min-height:50px;font-size:16px;cursor:pointer;transition:transform .02s ease,background .2s ease,color .2s ease,box-shadow .2s ease}.btn:active{transform:scale(.98)}.btn-outline{border:2px solid #0c0e10;color:#0c0e10;background:transparent}.btn-outline:hover{background:#94a3b81f}.btn-primary{border:0;background:#0f172a;color:#fff;box-shadow:0 6px 16px #0f172a2e}.btn-primary:hover{box-shadow:0 8px 20px #0f172a3d}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-outline:disabled{opacity:1;background:#e2e8f0;border-color:#e2e8f0;color:#4a5568;cursor:not-allowed}.sqrt{font-variant-numeric:lining-nums}@media (min-width: 768px){.card{padding:26px 28px}}.next-puzzle-btn{position:absolute;right:0;width:32px;height:32px;background:none;border:none;color:#ff9f0a;font-size:22px;cursor:pointer;display:flex;align-items:center;justify-content:center;border-radius:6px;transition:all .2s ease;padding:4px;line-height:1}.next-puzzle-btn:hover{background:#ff9f0a1f;transform:scale(1.05)}.next-puzzle-btn:active{transform:scale(.95)}.win-modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000c7;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:1000;animation:wmFadeIn .25s ease}@keyframes wmFadeIn{0%{opacity:0}to{opacity:1}}.win-modal{background:#0c0e10;border:1px solid #2e2e2e;border-radius:16px;padding:20px 28px 32px;width:400px;max-width:92vw;display:flex;flex-direction:column;align-items:center;gap:14px;position:relative;animation:wmSlideUp .3s ease}@keyframes wmSlideUp{0%{transform:translateY(18px);opacity:0}to{transform:translateY(0);opacity:1}}.win-modal-close{position:absolute;top:16px;right:20px;background:none;border:none;color:#666;font-size:28px;cursor:pointer;line-height:1;padding:4px 6px;border-radius:50%;transition:color .15s}.win-modal-close:hover{color:#ccc}.win-modal-top-msg{min-height:20px;display:flex;align-items:center;justify-content:center}.win-modal-badge{width:100%;max-width:150px;background:#0c0e10;border-radius:5px;padding:9px 12px;margin:6px 0 2px;box-sizing:border-box}.win-modal-badge-inner{background:#116631;border:4px solid #0b1020;border-radius:3px;padding:6px;display:flex;align-items:center;justify-content:center}.win-modal-badge-time{font-family:var(--font-mono);font-weight:700;color:#fff;font-size:18px;line-height:1;white-space:nowrap}.win-modal-title{font-size:32px;font-weight:400;color:#fff;margin:0;font-family:var(--font-serif);text-align:center}.win-modal-subtitle{font-size:16.5px;color:#aaa;text-align:center;margin:0 0 14px;font-family:var(--font-serif)}.win-modal-btn{width:100%;padding:15px 24px;min-height:50px;border-radius:999px;font-size:17px;font-weight:400;cursor:pointer;border:none;transition:all .2s;font-family:var(--font-serif);display:flex;align-items:center;justify-content:center}.win-modal-btn:disabled{opacity:.45;cursor:not-allowed}.win-modal-btn-create{background:#dfe8f2;color:#0c0e10;border:none}.win-modal-btn-create:not(:disabled):hover{background:#cdd8e8}.win-modal-login-row{font-size:15px;color:#fff;display:flex;align-items:center;gap:4px;font-family:var(--font-serif)}.win-modal-link{background:none;border:none;color:#fff;text-decoration:underline;font-size:15px;cursor:pointer;padding:0;font-family:var(--font-serif)}.win-modal-link:disabled{cursor:not-allowed;opacity:.55}.win-modal-actions{display:flex;flex-direction:column;align-items:stretch;width:max-content;gap:10px}.win-modal-actions .win-modal-btn{width:100%}.win-modal-btn-puzzles{background:var(--tile);color:#fff;border:2px solid #FF9F0A;font-family:var(--font-mono);font-size:16px;font-weight:400;min-height:50px}.win-modal-btn-puzzles:hover{background:#ff9f0a14;border-color:#ffb340}.win-modal-btn-share{background:#116631;color:#fff}.win-modal-btn-share:hover,.win-modal-btn-share-copied{background:#0e5529}.win-modal-copied{font-size:14px;color:var(--ok);margin:0;text-align:center}.auth-modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000c7;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:1100;animation:wmFadeIn .25s ease}.auth-modal{background:#18191b;border:1px solid #2e2e2e;border-radius:24px;padding:28px 32px 32px;width:380px;max-width:92vw;display:flex;flex-direction:column;gap:16px;position:relative;animation:wmSlideUp .3s ease}.auth-modal-close{position:absolute;top:16px;right:20px;background:none;border:none;color:#666;font-size:28px;cursor:pointer;line-height:1;padding:4px 6px;border-radius:50%;transition:color .15s}.auth-modal-close:hover{color:#ccc}.auth-modal-tabs{display:flex;gap:8px;border-bottom:1px solid #2e2e2e;padding-bottom:12px}.auth-tab{background:none;border:none;color:#888;font-size:15px;font-family:var(--font-sans);font-weight:600;cursor:pointer;padding:4px 8px;border-radius:8px;transition:color .15s,background .15s}.auth-tab:hover{color:#ccc}.auth-tab.active{color:#fff;background:#2a2c2f}.auth-form{display:flex;flex-direction:column;gap:14px}.auth-field{display:flex;flex-direction:column;gap:6px}.auth-field label{font-size:13px;color:#999;font-family:var(--font-sans);font-weight:500}.auth-field input{background:#111;border:1px solid #333;border-radius:10px;color:#fff;font-size:15px;font-family:var(--font-sans);padding:10px 14px;outline:none;transition:border-color .15s}.auth-field input:focus{border-color:var(--accent)}.auth-field input::placeholder{color:#555}.auth-modal-error{font-size:13px;color:var(--err);margin:0;text-align:center}.auth-modal-message{font-size:14px;color:var(--ok);margin:0;text-align:center;padding:8px 0}.auth-submit-btn{background:var(--accent);color:#fff;border:none;border-radius:999px;padding:12px 24px;font-size:16px;font-weight:600;font-family:var(--font-sans);cursor:pointer;transition:background .2s;margin-top:4px}.auth-submit-btn:hover{background:var(--op-hover)}.auth-submit-btn:disabled{opacity:.5;cursor:not-allowed}.leaderboard{width:100%;display:flex;flex-direction:column;gap:8px}.leaderboard-title{font-size:14px;font-weight:600;color:#999;margin:0;text-transform:uppercase;letter-spacing:.05em;font-family:var(--font-sans);text-align:center}.leaderboard-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:4px;width:100%;max-height:220px;overflow-y:auto}.leaderboard-row{display:flex;align-items:center;gap:10px;padding:7px 10px;border-radius:10px;font-size:14px;font-family:var(--font-sans);color:#ccc;background:transparent}.leaderboard-row.leaderboard-you{background:#3b82f61f;color:#fff}.leaderboard-rank{font-size:12px;color:#666;width:20px;text-align:center;flex-shrink:0;font-family:var(--font-mono)}.leaderboard-name{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.leaderboard-you-tag{color:var(--accent);font-size:12px}.leaderboard-time{font-family:var(--font-mono);font-size:13px;color:var(--ok);flex-shrink:0}.leaderboard-loading,.leaderboard-empty{font-size:14px;color:#666;text-align:center;padding:12px 0;font-family:var(--font-sans)}.equators-board{width:100%;display:flex;flex-direction:column;gap:0}.equators-board-title{font-size:13px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:#888;margin:0 0 12px;text-align:center}.equators-board-tabs{display:flex;gap:6px;justify-content:center;margin-bottom:16px}.equators-board-tab{background:#1a1a1a;border:1px solid #333;color:#888;font-size:13px;font-weight:600;padding:6px 14px;border-radius:6px;cursor:pointer;transition:background .15s,color .15s,border-color .15s;font-family:var(--font-sans)}.equators-board-tab:hover{background:#252525;color:#ccc}.equators-board-tab.active{background:var(--accent);border-color:var(--accent);color:#fff}.equators-board-stats{display:flex;flex-direction:column;gap:2px}.equators-board-stat{display:flex;align-items:baseline;justify-content:space-between;padding:10px 12px;border-radius:8px;background:#161616}.equators-board-stat--comparison{margin-top:6px;flex-direction:column;align-items:flex-start;gap:4px}.equators-board-stat-label{font-size:12px;color:#777;font-family:var(--font-sans);flex-shrink:0}.equators-board-stat-value{font-family:var(--font-mono);font-size:15px;color:#eee;font-weight:500}.equators-board-comparison-value{font-family:var(--font-sans);font-size:13px;color:var(--ok)}.equators-board-loading{font-size:14px;color:#666;text-align:center;padding:16px 0;font-family:var(--font-sans)}.equators-board-error{font-size:13px;color:#e05;text-align:center;padding:12px 0;font-family:var(--font-sans)}.landing-return-card{margin-top:8px;width:100%;border:1px solid #94a3b8;border-radius:14px;padding:22px;box-shadow:0 1.5px #0f172a0d inset}.landing-returning-guest .landing-return-card{width:75%;margin-left:auto;margin-right:auto}.landing-return-score{font-size:17px;color:#2a2a2a;margin:0 0 24px;line-height:1.5}.landing-inline-link{background:none;border:none;padding:0;font-size:inherit;font-family:inherit;color:#1a56db;cursor:pointer;text-decoration:underline;text-underline-offset:2px}.landing-inline-link:hover{color:#1e40af}.landing-guest-miss{font-size:17px;color:#555;margin:0 0 24px;font-style:italic}.replay-refresh-btn{position:absolute;left:0;background:none;border:none;color:#ff9f0a;font-size:22px;cursor:pointer;padding:4px 8px;line-height:1;border-radius:6px;transition:opacity .15s}.replay-refresh-btn:hover{opacity:.75}.replay-refresh-btn:active{opacity:.5}.replay-play-more-btn{display:block;width:calc(50% - 20px);margin:12px auto 0;padding:10px 8px;min-height:50px;background:var(--tile);color:#fff;border:2px solid #FF9F0A;border-radius:25px;font-size:16px;font-family:var(--font-mono);font-weight:400;white-space:nowrap;cursor:pointer;text-align:center;transition:background .2s ease,border-color .2s ease}.replay-play-more-btn:hover{background:#ff9f0a14;border-color:#ffb340}