:root{
  --aa3-ink:#0c1020;
  --aa3-surface: rgba(255,255,255,.82);
  --aa3-border: rgba(12,16,32,.14);
  --aa3-rail: rgba(255,255,255,.72);
}
html,body{color:var(--aa3-ink);}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}

.aa3-bg{
  min-height:100vh;
  background:
    radial-gradient(1200px 600px at 12% 10%, rgba(255,77,141,.22), transparent 55%),
    radial-gradient(900px 500px at 88% 15%, rgba(59,130,246,.24), transparent 55%),
    radial-gradient(900px 500px at 50% 92%, rgba(34,197,94,.20), transparent 58%),
    #f8fafc;
}

.aa3-top{padding:.9rem 0;border-bottom:1px solid rgba(255,255,255,.55);backdrop-filter:saturate(160%) blur(10px);background:rgba(255,255,255,.58);position:sticky;top:0;z-index:40;}
.aa3-top-inner{display:grid;grid-template-columns:140px 1fr 240px;gap:1rem;align-items:center;}
#logo img{height:34px;width:auto;display:block;margin:0 auto;}
.aa3-site{font-weight:800;}
.aa3-tag{opacity:.85;font-size:.95rem;}

.aa3-shell{display:grid;grid-template-columns:240px 1fr;gap:1rem;padding:1rem 0 2rem;}
.aa3-rail{position:sticky;top:92px;background:var(--aa3-rail);border:1px solid rgba(255,255,255,.7);border-radius:16px;padding:1rem;}
.aa3-rail-head{font-weight:800;margin-bottom:.5rem;}
.aa3-rail-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.25rem;}
.aa3-rail-item a{display:block;padding:.45rem .55rem;border-radius:12px;text-decoration:none;color:inherit;}
.aa3-rail-item a:hover{background:rgba(12,16,32,.05);}
.aa3-rail-item.is-active a{background:rgba(59,130,246,.16);}

.aa3-masonry{columns: 2 320px;column-gap:1rem;}
.aa3-card{break-inside:avoid;background:var(--aa3-surface);border:1px solid var(--aa3-border);border-radius:18px;padding:1.1rem;margin:0 0 1rem;}

@media (max-width: 900px){
  .aa3-top-inner{grid-template-columns:1fr;}
  .aa3-shell{grid-template-columns:1fr;}
  .aa3-rail{display:none;}
  .aa3-masonry{columns:1;}
}

#footer{padding:1.25rem 0;border-top:1px solid rgba(255,255,255,.7);background:rgba(255,255,255,.55);backdrop-filter:saturate(160%) blur(10px);}
#footer .container{display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap;}
#footer .social{display:flex;gap:.5rem;}
#footer .social a{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:14px;border:1px solid rgba(255,255,255,.7);text-decoration:none;background:rgba(255,255,255,.5);}