:root{--bg: #0a0c14;--bg2: #0e111c;--card: #141826;--card2: #1b2032;--line: #29304a;--ink: #e9edf9;--mut: #98a2c4;--dim: #616a92;--teal: #2dd4bf;--teal2: #14b8a6;--cyan: #38bdf8;--violet: #a78bfa;--amber: #fbbf24;--green: #34d399;--red: #fb7185}*{box-sizing:border-box}html,body,#root{margin:0;padding:0}body{background:radial-gradient(1100px 560px at 82% -10%,#10283a 0%,var(--bg) 55%);color:var(--ink);font:15px/1.55 ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;min-height:100vh}a{color:var(--cyan);text-decoration:none}a:hover{text-decoration:underline}code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.9em;color:#99f6e4}.mono{font-family:ui-monospace,Menlo,Consolas,monospace}.wrap{max-width:1080px;margin:0 auto;padding:26px 20px 60px}header{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}h1{font-size:24px;margin:0;letter-spacing:-.4px;display:flex;align-items:center;gap:10px}h1 .logo{font-size:22px}.ghbtn{border:1px solid var(--line);background:var(--card);color:var(--ink);border-radius:10px;padding:8px 14px;font-size:13px;white-space:nowrap}.ghbtn:hover{border-color:var(--teal2);text-decoration:none}.sub{color:var(--mut);margin:8px 0 22px;max-width:820px}.sub b{color:var(--ink)}.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}@media(max-width:760px){.grid{grid-template-columns:1fr}}.card{background:linear-gradient(180deg,var(--card),var(--bg2));border:1px solid var(--line);border-radius:14px;padding:15px;display:flex;flex-direction:column}.chead{display:flex;align-items:flex-start;justify-content:space-between;gap:10px;margin-bottom:12px}.chead h2{margin:0;font-size:15px}.chead h2 code{color:var(--teal);font-size:1em}.tag{color:var(--mut);font-size:12.5px;margin:3px 0 0}.codebtn{border:1px solid var(--line);background:var(--card2);color:var(--mut);border-radius:8px;padding:5px 11px;font:inherit;font-size:12px;cursor:pointer;white-space:nowrap}.codebtn:hover{border-color:var(--teal2);color:var(--ink)}.codebtn.on{background:#0c2a24;color:var(--teal);border-color:var(--teal2)}.demo{display:flex;flex-direction:column;gap:10px;flex:1}.code{background:#08060f;border:1px solid var(--line);border-radius:11px;padding:12px 13px;margin:0;overflow-x:auto;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:11.5px;line-height:1.55;color:#d7dcf5;white-space:pre;flex:1}input{background:#0c0f18;border:1px solid var(--line);color:var(--ink);border-radius:9px;padding:9px 11px;font:inherit;font-size:13px;width:100%}input:focus{outline:none;border-color:var(--teal2)}.kv{display:flex;justify-content:space-between;align-items:baseline;font-size:12.5px;color:var(--mut);gap:12px}.kv b{font-size:13.5px;color:var(--ink)}.kv b.ok{color:var(--green)}.kv b.no{color:var(--dim)}.note{color:var(--dim);font-size:11.5px;line-height:1.5;margin-top:auto}.note b{color:var(--mut)}button{border:1px solid var(--line);background:var(--card2);color:var(--ink);border-radius:9px;padding:8px 14px;font:inherit;font-size:13px;cursor:pointer}button:hover{border-color:var(--teal2)}button.primary{border:0;background:linear-gradient(180deg,var(--teal),var(--teal2));color:#04120f;font-weight:800}button.primary.done{background:linear-gradient(180deg,var(--green),#10b981)}.bigrow{display:flex;align-items:center;justify-content:center;gap:14px;padding:6px 0}.big{position:relative;min-width:74px;text-align:center;font-family:ui-monospace,monospace;font-size:30px;font-weight:800;background:var(--card2);border:1px solid var(--line);border-radius:11px;padding:14px 8px 8px;color:var(--mut)}.big.cur{color:var(--teal);border-color:var(--teal2)}.big .lbl{position:absolute;top:5px;left:0;right:0;font-size:9.5px;text-transform:uppercase;letter-spacing:.06em;color:var(--dim);font-family:ui-sans-serif;font-weight:600}.arrow{color:var(--dim);font-size:20px}.btnrow{display:flex;gap:8px;justify-content:center}.dropwrap{position:relative;display:flex;flex-direction:column;gap:10px}.drop{position:relative;margin-top:4px;background:var(--card2);border:1px solid var(--teal2);border-radius:10px;padding:5px;box-shadow:0 12px 30px #0006}.dropitem{padding:8px 11px;border-radius:7px;font-size:13px;color:var(--ink);cursor:pointer}.dropitem:hover{background:#12332c}.drophint{padding:6px 11px;font-size:10.5px;color:var(--dim)}.copyrow{display:flex;align-items:center;gap:10px}.copytext{flex:1;background:#0c0f18;border:1px solid var(--line);border-radius:8px;padding:9px 11px;font-size:12px;color:#99f6e4;overflow-x:auto;white-space:nowrap}.switch{width:54px;height:30px;border-radius:999px;background:#262c42;border:1px solid var(--line);position:relative;padding:0;cursor:pointer;align-self:flex-start}.switch .knob{position:absolute;top:3px;left:3px;width:22px;height:22px;border-radius:50%;background:var(--dim);transition:all .18s}.switch.on{background:#0c3a30;border-color:var(--teal2)}.switch.on .knob{left:27px;background:var(--teal)}.scrollbox{height:130px;overflow-y:auto;border:1px solid var(--line);border-radius:11px;background:#0a0d16}.spacer{height:150px;display:flex;align-items:center;justify-content:center;color:var(--dim);font-size:12px}.target{height:60px;margin:0 14px;display:flex;align-items:center;justify-content:center;border-radius:10px;background:var(--card2);border:1px solid var(--line);font-family:ui-monospace,monospace;font-size:13px;color:var(--mut);transition:all .2s}.target.lit{background:linear-gradient(135deg,#0c3a30,#0e7490);border-color:var(--teal);color:var(--teal)}footer{margin-top:26px;color:var(--dim);font-size:12.5px;text-align:center;border-top:1px solid var(--line);padding-top:18px}footer code{color:var(--mut)}