*{margin:0;padding:0;box-sizing:border-box}
html,body{height:100%;background:var(--bg,#03060f);color:var(--text,#e0eaff);font-family:'Segoe UI',system-ui,sans-serif;overflow-x:hidden}
body{transition:background-color .25s ease,color .25s ease}
#bg{position:fixed;inset:0;z-index:0;pointer-events:none}
.page{position:relative;z-index:1;min-height:100vh;padding:60px 24px 80px}
header{text-align:center;margin-bottom:64px}
header h1{font-size:clamp(2rem,5vw,3.4rem);font-weight:800;letter-spacing:-1px;
  background:linear-gradient(120deg,var(--grad-1,#7ef0ff),var(--grad-2,#a080ff),var(--grad-3,#ff80c0));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:16px}
header p{color:var(--text-dim,#8099bb);font-size:1.05rem;max-width:520px;margin:0 auto;line-height:1.6}
.back-link{display:inline-block;color:var(--link,#7ef0ff);text-decoration:none;font-size:.85rem;font-weight:600}
.back-link:hover{text-decoration:underline}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:28px;max-width:1100px;margin:0 auto}
.card{
  background:var(--card-bg,rgba(8,16,36,0.72));
  border:1px solid var(--card-border,rgba(255,255,255,0.08));
  border-radius:20px;
  overflow:hidden;
  backdrop-filter:blur(12px);
  transition:transform .3s,box-shadow .3s,border-color .3s,background-color .3s;
  cursor:pointer;
  text-decoration:none;
  display:block;
  color:inherit;
}
.card:hover{transform:translateY(-6px) scale(1.02);border-color:var(--accent);box-shadow:0 16px 48px var(--shadow,rgba(0,0,0,.5)),0 0 32px color-mix(in srgb,var(--accent) 30%,transparent)}
.card canvas{display:block;width:100%;height:160px}
.card-body{padding:20px 22px 24px}
.card-eq{font-size:1rem;font-family:'Courier New',monospace;color:var(--accent);
  text-shadow:0 0 12px color-mix(in srgb,var(--accent) 60%,transparent);
  margin-bottom:10px;opacity:.9}
.card-title{font-size:1.25rem;font-weight:700;margin-bottom:6px;letter-spacing:-.3px}
.card-desc{font-size:.88rem;color:var(--card-desc,#7090aa);line-height:1.55;margin-bottom:16px}
.card-link{display:inline-flex;align-items:center;gap:6px;font-size:.88rem;font-weight:600;
  color:var(--accent);text-decoration:none;opacity:.85;transition:opacity .2s}
.card:hover .card-link{opacity:1}
footer{text-align:center;margin-top:72px;color:var(--footer,#3a5070);font-size:.82rem}
footer a{color:var(--footer,#3a5070);text-decoration:none}
footer a:hover{text-decoration:underline}

/* Light mode: neon card accents are too pale on white — darken for legibility */
html[data-theme="light"] .card-eq{
  color:color-mix(in srgb,var(--accent) 58%,var(--accent-ink,#0e1f3a));
  text-shadow:none;opacity:1}
html[data-theme="light"] .card-link{
  color:color-mix(in srgb,var(--accent) 55%,var(--accent-ink,#0e1f3a));opacity:1}

@media (max-width:560px){
  .page{padding:44px 16px 64px}
  header{margin-bottom:40px}
  .grid{gap:18px;grid-template-columns:1fr}
}