:root{
    --bg:#FFFFFF;
    --panel:#FFFFFF;
    --line:#E6E6E6;
    --ink:#0A0A0A;
    --dim:#5F5F5F;
    --faint:#9B9B9B;
    --blk:#F4F4F4;
    --ghostline:#C9C9C9;
    --tagline:#CFCFCF;
    --dark:#000000;
    --dark-line:#262626;
    --dark-dim:#A3A3A3;
  }
[data-theme="dark"]{
    --bg:#0B0C0F;
    --panel:#171C24;
    --line:#2E3540;
    --dark-line:#2E3540;
    --ink:#FAFAFA;
    --dim:#A8A8A8;
    --faint:#6E6E6E;
    --blk:#171C24;
    --ghostline:#3A3A3A;
    --tagline:#3A3A3A;
  }
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font-family:'Libre Franklin',sans-serif;-webkit-font-smoothing:antialiased;overflow-x:hidden}
.wrap{max-width:1440px;margin:0 auto;padding:0 60px}
@media(max-width:760px){
.wrap{padding:0 22px}
}
.rv{opacity:0;transform:translateY(26px);transition:opacity .95s cubic-bezier(.22,.8,.3,1),transform .95s cubic-bezier(.22,.8,.3,1)}
.rv.in{opacity:1;transform:none}
.d1{transition-delay:.05s}
.d2{transition-delay:.15s}
.d3{transition-delay:.3s}
.d4{transition-delay:.5s}
nav{display:flex;align-items:center;justify-content:space-between;padding:26px 0}
.bi{font-style:italic}
.logo{font-weight:600;font-size:21px;letter-spacing:-.02em;color:var(--ink);text-decoration:none}
.btn{display:inline-block;background:var(--ink);color:var(--bg) !important;font-weight:500;font-size:15px;padding:13px 28px;border-radius:14px;text-decoration:none;transition:opacity .25s,transform .25s}
.btn,.mode-btn,.lang-pill,.menu-toggle,.choice-card,a{-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent;-webkit-touch-callout:none}
.btn:hover{opacity:.82;transform:translateY(-1px)}
.btn.light{background:#FAFAFA;color:#0A0A0A !important}
.btn.ghost{background:transparent;color:var(--ink) !important;border:1px solid var(--ghostline)}
.btn.ghost:hover{border-color:var(--ink);opacity:1}
.btn.big{padding:17px 36px;font-size:16px}
.nav-ctl{display:flex;gap:10px;align-items:center}
.icon-btn:hover{border-color:var(--ink)}
.mode-btn{height:38px;padding:0 20px;border:1px solid var(--line);background:var(--panel);color:var(--ink);font-family:'JetBrains Mono',monospace;font-size:11px;font-weight:600;letter-spacing:.18em;cursor:pointer;border-radius:12px;transition:border-color .25s}
.mode-btn:hover{border-color:var(--ink)}
.mode-btn .t-dark{display:none}
[data-theme="dark"] .mode-btn .t-dark{display:inline}
[data-theme="dark"] .mode-btn .t-light{display:none}
nav{position:fixed;top:0;left:0;right:0;z-index:110;background:color-mix(in srgb, var(--bg) 92%, transparent);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border-bottom:1px solid var(--line);padding:14px 24px}
@media(max-width:760px){
nav{padding:12px 22px}
}
.menu-toggle{background:transparent;border:1px solid var(--line);color:var(--ink);width:38px;height:38px;border-radius:6px;display:flex;align-items:center;justify-content:center;padding:0;position:relative;z-index:101;cursor:pointer}
.menu-toggle:hover{background:var(--blk);border-color:var(--faint)}
.menu-icon{position:relative;width:18px;height:13px;display:flex;flex-direction:column;justify-content:space-between}
.menu-line{display:block;width:18px;height:1.6px;background:currentColor;border-radius:2px;transition:transform .2s ease,opacity .2s ease}
.menu-toggle.is-open .line1{transform:translateY(5.7px) rotate(45deg)}
.menu-toggle.is-open .line2{opacity:0}
.menu-toggle.is-open .line3{transform:translateY(-5.7px) rotate(-45deg)}
.menu-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.6);opacity:0;pointer-events:none;transition:opacity .2s ease;z-index:90}
.menu-backdrop.open{opacity:1;pointer-events:auto}
.menu-panel{position:fixed;top:0;right:0;bottom:0;width:270px;max-width:80vw;background:var(--bg);border-left:1px solid var(--line);transform:translateX(100%);transition:transform .25s ease,visibility 0s linear .25s;z-index:100;display:flex;flex-direction:column;align-items:stretch;justify-content:flex-start;overflow-y:auto;padding-top:85px;box-sizing:border-box;visibility:hidden}
.menu-panel.open{transform:translateX(0);visibility:visible;transition:transform .25s ease}
.menu-panel a{display:block;padding:16px 24px;color:var(--ink);text-decoration:none;font-size:16px;font-weight:500;border-bottom:1px solid var(--line)}
.menu-panel a:hover{background:var(--panel)}
.menu-util{margin-top:auto;border-top:1px solid var(--line);padding:20px 24px 24px;display:flex;flex-direction:column;gap:18px}
.menu-util-row{display:flex;align-items:center;justify-content:space-between;gap:12px}
.menu-util-label{font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:.14em;color:var(--dim)}
.lang-seg{display:flex;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.lang-opt{height:38px;padding:0 18px;background:transparent;color:var(--dim);font-family:'JetBrains Mono',monospace;font-size:11px;font-weight:600;letter-spacing:.18em;cursor:pointer;border:none}
.lang-opt.active{background:var(--ink);color:var(--bg)}
.lang-pill{height:38px;padding:0 16px;border:1px solid var(--line);background:transparent;color:var(--ink);font-family:'JetBrains Mono',monospace;font-size:11px;font-weight:600;letter-spacing:.18em;cursor:pointer;border-radius:12px;transition:border-color .25s}
.lang-pill:hover{border-color:var(--ink)}
details{border-bottom:1px solid var(--line);padding:24px 4px}
details:first-child{border-top:1px solid var(--line)}
summary{cursor:pointer;font-size:17.5px;font-weight:500;list-style:none;display:flex;justify-content:space-between;align-items:center;letter-spacing:-.01em}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font-size:22px;font-weight:400}
details[open ] summary::after{content:"-"}
details p{color:var(--dim);font-size:15.5px;line-height:1.7;margin-top:12px;max-width:580px;font-weight:500;overflow:hidden;transition:height .38s cubic-bezier(.22,.8,.3,1),opacity .3s ease}
footer{border-top:1px solid var(--dark-line);margin-top:96px;padding-top:34px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;color:#777;font-size:13.5px}
footer div{display:flex;gap:26px;align-items:center}
footer .social-link{display:inline-flex}
footer .social-link svg{width:24px;height:24px;fill:currentColor}
footer a{color:var(--dark-dim);text-decoration:none}
footer a:hover{color:#FAFAFA}

 
:root{--acc:#1F56E5}
[data-theme="dark"]{--acc:#3D7BFF}
.btn:not(.ghost){background:var(--acc);color:#FFFFFF !important}
.btn.light{background:var(--acc);color:#FFFFFF !important}
.primary-btn{background:var(--acc) !important;color:#FFFFFF !important}
.primary-btn:hover,.primary-btn:active,.secondary-btn:hover,.secondary-btn:active{opacity:.82;transform:translateY(-1px)}
.lbl{font-family:'JetBrains Mono',monospace;font-size:12px;letter-spacing:.14em;color:var(--acc)}
.hero{position:relative}
.hero>*{position:relative;z-index:1}
.glow{position:absolute;top:-150px;left:50%;transform:translateX(-50%);width:860px;max-width:100vw;height:500px;background:radial-gradient(closest-side,color-mix(in srgb,var(--acc) 22%,transparent),transparent 72%);pointer-events:none;z-index:0 !important}
html,body{overflow-x:clip}
strong{font-weight:600}
h2{font-weight:600}
@keyframes pageFadeOut{from{opacity:1}to{opacity:0}}
body::after{content:"";position:fixed;inset:0;background:var(--bg);pointer-events:none;z-index:9999;animation:pageFadeOut 180ms ease-out forwards}
@media (prefers-reduced-motion:reduce){
  body::after{display:none}
}
[data-theme="dark"] .blk,[data-theme="dark"] .card,[data-theme="dark"] .choice-card,[data-theme="dark"] .split-card{background:#0B0C0F}