:root{--bg:#0a0e0f;--ink:#e7f0f2;--muted:#8ba3a8;--line:rgba(130,200,210,.13);--card:rgba(16,26,28,.62);--cyan:#22d3ee;--sky:#38bdf8;--grad:linear-gradient(105deg,#38bdf8,#22d3ee 50%,#06b6d4);--mono:ui-monospace,"SF Mono","JetBrains Mono",Menlo,Consolas,monospace;--radius:20px;--shadow:0 30px 80px -30px rgba(0,0,0,.8);--add:#34d399;--del:#f87171}*{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%,#0e2830 0,transparent 60%),radial-gradient(1000px 700px at 4% 110%,#0c2228 0,transparent 55%),var(--bg)}.blob{position:fixed;border-radius:50%;filter:blur(85px);opacity:.3;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%,#38bdf8,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%,#22d3ee,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:980px;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(34,211,238,.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 22px;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}.panes{display:grid;grid-template-columns:1fr 1fr;grid-gap:14px;gap:14px}@media (max-width:720px){.panes{grid-template-columns:1fr}}.pane{display:flex;flex-direction:column;gap:7px}.pane label{font-size:11.5px;color:var(--muted);font-weight:600}textarea{width:100%;min-height:200px;background:rgba(10,14,15,.72);border:1px solid var(--line);color:var(--ink);border-radius:13px;padding:14px;font-family:var(--mono);font-size:13px;line-height:1.55;outline:none;resize:vertical;white-space:pre}textarea:focus{border-color:var(--cyan);box-shadow:0 0 0 3px rgba(34,211,238,.14)}.tools{display:flex;gap:10px;margin:14px 0;flex-wrap:wrap;align-items:center}.chip{background:rgba(56,189,248,.1);color:var(--sky);border:1px solid rgba(56,189,248,.3);border-radius:9px;padding:8px 13px;font-size:12.5px;font-weight:600;cursor:pointer}.chip:hover{background:rgba(56,189,248,.2)}.summary{margin-left:auto;display:flex;gap:14px;font-size:13px;font-weight:700}.summary .a{color:var(--add)}.summary .d{color:var(--del)}.summary .u{color:var(--muted);font-weight:500}.result{background:rgba(16,26,28,.62);border:1px solid var(--line);border-radius:var(--radius);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);box-shadow:var(--shadow);overflow:hidden}.diff{font-family:var(--mono);font-size:13px;line-height:1.6;max-height:480px;overflow:auto}.dl{display:flex;gap:0;padding:1px 0}.dl .gutter{width:46px;flex-shrink:0;text-align:right;padding:1px 10px 1px 0;color:#5a7078;-webkit-user-select:none;-moz-user-select:none;user-select:none}.dl .txt{flex:1 1;padding:1px 12px 1px 8px;white-space:pre-wrap;word-break:break-word}.dl.add{background:rgba(52,211,153,.1)}.dl.add .txt{color:#b6f5da}.dl.add .sign{color:var(--add)}.dl.del{background:hsla(0,91%,71%,.1)}.dl.del .txt{color:#ffd3d3}.dl.del .sign{color:var(--del)}.dl .sign{display:inline-block;width:14px;color:#5a7078}.identical{color:var(--muted);font-family:var(--mono);font-size:14px}.empty,.identical{text-align:center;padding:40px 20px}.empty{color:#5a7078}.footer{margin-top:26px;display:flex;flex-wrap:wrap;gap:10px;justify-content:center;align-items:center;color:var(--muted);font-size:13px}.footer .sep{opacity:.4}