:root{ --grid:#0f1c48; --neon:#66ffe3; --ink:#e8eefc; }
html,body{margin:0;padding:0;background:#040916;color:var(--ink);font-family:Inter, ui-sans-serif, system-ui, Segoe UI}
.canvas-bg{position:fixed;inset:0;z-index:-1;background:radial-gradient(1000px 400px at 80% -10%, rgba(102,255,227,.12), transparent 60%), radial-gradient(800px 500px at 10% 10%, rgba(106,168,255,.18), transparent 60%)}
.grid-overlay{position:fixed;inset:0;background-image:linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px);background-size:40px 40px;opacity:.2;pointer-events:none}
.container{max-width:1200px;margin:0 auto;padding:28px 20px}
.hdr{display:flex;align-items:center;gap:14px;margin-bottom:12px}
.hdr .neon{width:18px;height:18px;border-radius:50%;background:conic-gradient(from 0deg, #6aa8ff, #66ffe3, #6aa8ff);box-shadow:0 0 16px rgba(102,255,227,.5)}
h1{margin:0 0 6px}
p.sub{margin:0 0 14px;color:#9fb0cf}
.deck{display:grid;grid-template-columns:repeat(12,1fr);gap:16px;margin-top:14px}
.tile{grid-column:span 6;background:linear-gradient(180deg,#0a1230,#0a1024);border:1px solid rgba(255,255,255,.08);border-radius:16px;padding:14px;box-shadow:0 0 0 1px rgba(102,255,227,.15), 0 18px 60px rgba(0,0,0,.45)}
.tile h3{margin:6px 0 6px}
.tile p{color:#cbd6f3;font-size:14px}
.tagz{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px}
.tag{font-size:12px;background:#0e1736;border:1px solid rgba(255,255,255,.12);padding:4px 10px;border-radius:999px}
.tile img{width:100%;border-radius:10px;margin-top:10px}
footer{margin-top:20px;color:#9fb0cf;text-align:center}
@media (max-width:860px){ .tile{grid-column:span 12} }


/* THEME VARIANTS */
:root[data-theme="light"] body{background:#f6f8fc;color:#131729}
:root[data-theme="light"] .grid-overlay{background-image:linear-gradient(#dfe6f7 1px, transparent 1px), linear-gradient(90deg, #dfe6f7 1px, transparent 1px);opacity:.5}
:root[data-theme="light"] .tile{background:#fff;border:1px solid rgba(0,0,0,.08);box-shadow:none}
:root[data-theme="light"] .tag{background:#eef2fb;border:1px solid rgba(0,0,0,.1)}
:root[data-theme="light"] .canvas-bg{background:radial-gradient(1000px 400px at 80% -10%, rgba(0,188,212,.12), transparent 60%), radial-gradient(800px 500px at 10% 10%, rgba(47,109,255,.18), transparent 60%)}
:root[data-theme="light"] footer{color:#4c5a73}


/* Light-mode contrast fixes (Hi-Tech Lab) */
:root[data-theme="light"] .tag{
  background:#eef2fb;
  border-color:#dbe3f5;
  color:#0b1330;
}
:root[data-theme="light"] .tile h3{
  color:#0b1330;
}
:root[data-theme="light"] a{
  color:#0b1330;
}