:root{--bg:#05100f;--ink:#e4faf6;--muted:#7fb8ae;--line:rgba(90,220,200,.14);--card:rgba(10,30,28,.62);--teal:#2dd4bf;--cyan:#22d3ee;--grad:linear-gradient(105deg,#2dd4bf,#14b8a6 50%,#06b6d4);--mono:ui-monospace,"SF Mono","JetBrains Mono",Menlo,Consolas,monospace;--radius:20px;--shadow:0 30px 80px -30px rgba(0,0,0,.8)}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased;overflow-x:hidden;line-height:1.5}.bg-wrap{position:fixed;inset:0;z-index:-3;background:radial-gradient(1200px 800px at 82% -12%,#0a2e2a 0,transparent 60%),radial-gradient(1000px 700px at 4% 110%,#08201d 0,transparent 55%),var(--bg)}.blob{position:fixed;border-radius:50%;filter:blur(85px);opacity:.32;z-index:-2;animation:float 28s ease-in-out infinite;will-change:transform}.b1{width:44vw;height:44vw;left:-12vw;top:-14vw;background:radial-gradient(circle at 30% 30%,#2dd4bf,transparent 66%)}.b2{width:42vw;height:42vw;right:-14vw;top:8vh;background:radial-gradient(circle at 60% 40%,#06b6d4,transparent 64%);animation-delay:-10s}.b3{width:40vw;height:40vw;left:26vw;bottom:-22vw;background:radial-gradient(circle at 50% 50%,#14b8a6,transparent 62%);animation-delay:-17s}@keyframes float{0%,to{transform:translate(0) scale(1)}33%{transform:translate(4vw,3vh) scale(1.07)}66%{transform:translate(-3vw,-2vh) scale(.95)}}.grid-overlay{position:fixed;inset:0;z-index:-1;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:54px 54px;-webkit-mask-image:radial-gradient(1100px 700px at 50% -5%,#000 0,transparent 78%);mask-image:radial-gradient(1100px 700px at 50% -5%,#000 0,transparent 78%);opacity:.5}@media (prefers-reduced-motion:reduce){.blob{animation:none}}.shell{max-width:820px;margin:0 auto;padding:30px 22px 60px}.brand-row{display:flex;align-items:center;gap:11px;margin-bottom:30px}.logo-mark{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;background:var(--grad);box-shadow:0 8px 26px -8px rgba(20,184,166,.6)}.wordmark{font-weight:800;font-size:20px;letter-spacing:-.02em}.wordmark b{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}.hero{text-align:center;margin:6px auto 24px;max-width:640px}.hero h1{font-size:clamp(30px,5.4vw,50px);line-height:1.05;letter-spacing:-.035em;font-weight:850;margin:0 0 12px}.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}.hero p{color:var(--muted);font-size:clamp(15px,2.2vw,17px);margin:0 auto;max-width:540px}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);box-shadow:var(--shadow)}.field label{display:block;font-size:12.5px;color:var(--muted);margin-bottom:6px;font-weight:600}.input-cidr{width:100%;background:rgba(5,16,15,.72);border:1px solid var(--line);color:var(--ink);border-radius:12px;padding:14px 15px;font-family:var(--mono);font-size:17px;outline:none;letter-spacing:.02em;transition:border-color .15s ease,box-shadow .15s ease}.input-cidr::placeholder{color:#45786f}.input-cidr:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(45,212,191,.16)}.input-cidr.bad{border-color:#f87171}.tools{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:12px}.chip{background:rgba(45,212,191,.1);color:var(--teal);border:1px solid rgba(45,212,191,.3);border-radius:9px;padding:7px 12px;font-size:12.5px;font-weight:600;cursor:pointer}.chip:hover{background:rgba(45,212,191,.2)}.hint{margin-top:14px;color:var(--muted);font-size:13.5px;text-align:center;padding:24px 10px}.hint.err{color:#f87171}.grid-res{margin-top:18px;display:grid;grid-template-columns:1fr 1fr;grid-gap:10px;gap:10px}@media (max-width:560px){.grid-res{grid-template-columns:1fr}}.cell{background:rgba(90,220,200,.05);border:1px solid var(--line);border-radius:12px;padding:12px 14px;display:flex;flex-direction:column;gap:3px;cursor:pointer;transition:background .15s ease}.cell:hover{background:rgba(90,220,200,.1)}.cell .k{font-size:11.5px;color:var(--muted);font-weight:600}.cell .v{font-family:var(--mono);font-size:15px;color:#ccfbf1;word-break:break-all}.cell.wide{grid-column:1/-1}.cell .v.big{color:var(--teal);font-weight:700}.toast{position:fixed;bottom:26px;left:50%;transform:translateX(-50%);background:var(--grad);color:#05100f;font-weight:700;font-size:13px;padding:9px 18px;border-radius:999px;box-shadow:var(--shadow)}.footer{margin-top:28px;display:flex;flex-wrap:wrap;gap:10px;justify-content:center;align-items:center;color:var(--muted);font-size:13px}.footer .sep{opacity:.4}