:root{--text:#6b6375;--text-h:#08060d;--bg:#fff;--border:#e5e4e7;--code-bg:#f4f3ec;--accent:#aa3bff;--accent-bg:#aa3bff1a;--accent-border:#aa3bff80;--social-bg:#f4f3ec80;--shadow:#0000001a 0 10px 15px -3px, #0000000d 0 4px 6px -2px;--sans:system-ui, "Segoe UI", Roboto, sans-serif;--heading:system-ui, "Segoe UI", Roboto, sans-serif;--mono:ui-monospace, Consolas, monospace;font:18px/145% var(--sans);letter-spacing:.18px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;color:var(--text);background:var(--bg);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial}}@media (width<=1024px){:root{font-size:16px}}@media (prefers-color-scheme:dark){:root{--text:#9ca3af;--text-h:#f3f4f6;--bg:#16171d;--border:#2e303a;--code-bg:#1f2028;--accent:#c084fc;--accent-bg:#c084fc26;--accent-border:#c084fc80;--social-bg:#2f303a80;--shadow:#0006 0 10px 15px -3px, #00000040 0 4px 6px -2px}#social .button-icon{filter:invert()brightness(2)}}#root{text-align:center;border-inline:1px solid var(--border);box-sizing:border-box;flex-direction:column;width:1126px;max-width:100%;min-height:100svh;margin:0 auto;display:flex}body{margin:0}h1,h2{font-family:var(--heading);color:var(--text-h);font-weight:500}h1{letter-spacing:-1.68px;margin:32px 0;font-size:56px}@media (width<=1024px){h1{margin:20px 0;font-size:36px}}h2{letter-spacing:-.24px;margin:0 0 8px;font-size:24px;line-height:118%}@media (width<=1024px){h2{font-size:20px}}p{margin:0}code,.counter{font-family:var(--mono);color:var(--text-h);border-radius:4px;display:inline-flex}code{background:var(--code-bg);padding:4px 8px;font-size:15px;line-height:135%}*{box-sizing:border-box}:root{--bg:#0f172a;--panel:#1e293b;--panel-2:#334155;--accent:#6366f1;--accent-2:#4f46e5;--text:#e2e8f0;--muted:#94a3b8;--danger:#f87171;--op:#f59e0b}body{background:var(--bg);color:var(--text);margin:0;font-family:system-ui,-apple-system,Segoe UI,sans-serif}.app{min-height:100vh}.center{justify-content:center;align-items:center;min-height:100vh;padding:1.5rem;display:flex}.auth-card{background:var(--panel);border:1px solid var(--panel-2);border-radius:16px;width:100%;max-width:360px;padding:2rem;box-shadow:0 20px 50px #0006}.auth-card h1{margin:0 0 .25rem;font-size:1.6rem}.subtitle{color:var(--muted);margin:0 0 1.5rem;font-size:.9rem}form{flex-direction:column;gap:1rem;display:flex}label{color:var(--muted);flex-direction:column;gap:.35rem;font-size:.85rem;display:flex}input{background:var(--bg);border:1px solid var(--panel-2);color:var(--text);border-radius:8px;outline:none;padding:.7rem .8rem;font-size:1rem}input:focus{border-color:var(--accent)}button{cursor:pointer;font-family:inherit}.primary{background:var(--accent);color:#fff;border:none;border-radius:8px;padding:.75rem;font-size:1rem;font-weight:600;transition:background .15s}.primary:hover:not(:disabled){background:var(--accent-2)}.primary:disabled{opacity:.6;cursor:default}.link{color:var(--accent);background:0 0;border:none;margin-top:1rem;font-size:.85rem}.link:hover{text-decoration:underline}.error{color:var(--danger);background:#f871711f;border:1px solid #f871714d;border-radius:8px;padding:.5rem .7rem;font-size:.85rem}.calc-layout{flex-wrap:wrap;justify-content:center;align-items:flex-start;gap:1.5rem;padding:2rem 1.5rem;display:flex}.calculator{background:var(--panel);border:1px solid var(--panel-2);border-radius:16px;width:340px;padding:1.25rem;box-shadow:0 20px 50px #0006}.calc-header{justify-content:space-between;align-items:center;margin-bottom:1rem;font-size:.8rem;display:flex}.calc-header .user{color:var(--muted);text-overflow:ellipsis;white-space:nowrap;max-width:200px;overflow:hidden}.calc-header .link{margin:0}.display{background:var(--bg);border-radius:10px;margin-bottom:1rem;padding:.8rem}.expr-input{text-align:right;background:0 0;border:none;width:100%;padding:0;font-size:1.5rem}.expr-input:focus{border:none}.result{text-align:right;color:var(--accent);min-height:1.3rem;margin-top:.3rem;font-size:1.1rem}.keys{grid-template-columns:repeat(4,1fr);gap:.6rem;display:grid}.key{background:var(--panel-2);color:var(--text);border:none;border-radius:10px;padding:1rem 0;font-size:1.1rem;transition:filter .1s}.key:hover{filter:brightness(1.2)}.key.op{background:var(--op);color:#1f2937;font-weight:700}.key.fn{background:#475569;font-size:.95rem}.key.equals{background:var(--accent);color:#fff;font-weight:700}.history{background:var(--panel);border:1px solid var(--panel-2);border-radius:16px;width:280px;padding:1.25rem}.history-head{justify-content:space-between;align-items:center;display:flex}.history-head h2{margin:0;font-size:1rem}.history-head .link{margin:0}.history .empty{color:var(--muted);font-size:.85rem}.history ul{flex-direction:column;gap:.4rem;max-height:360px;margin:.5rem 0 0;padding:0;list-style:none;display:flex;overflow-y:auto}.history li{background:var(--bg);cursor:pointer;border-radius:8px;flex-direction:column;gap:.15rem;padding:.5rem .7rem;display:flex}.history li:hover{background:var(--panel-2)}.h-expr{color:var(--muted);font-size:.85rem}.h-res{color:var(--accent);font-weight:600}