/* WolfieWeb Robot Tutorial - simple neon tech styling */
:root{
  --bg:#070b1a;
  --card:#0b1430;
  --text:#eaf6ff;
  --muted:#b7d7ee;
  --line:#203a63;
  --accent:#00b4ff;
  --accent2:#ff5078;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:linear-gradient(180deg,var(--bg),#050814);color:var(--text)}
a{color:var(--accent)}
code,pre{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier New",monospace}
.wrap{max-width:1050px;margin:0 auto;padding:18px}
.header{padding:18px 0 8px;background:radial-gradient(1200px 400px at 50% 0%, rgba(0,180,255,.25), transparent)}
.banner{width:100%;height:auto;border-radius:18px;border:2px solid rgba(0,180,255,.35);box-shadow:0 0 40px rgba(0,180,255,.12)}
.hero{padding:12px 6px}
h1{margin:14px 0 6px;font-size:clamp(28px,3vw,40px)}
h2{margin:0 0 10px;font-size:clamp(22px,2.2vw,28px)}
h3{margin:18px 0 8px}
.lead{color:var(--muted);font-size:1.05rem;line-height:1.5}
.fineprint{color:var(--muted);font-size:.95rem;margin-top:10px}
.cta-row{display:flex;flex-wrap:wrap;gap:10px;margin:14px 0}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 14px;border-radius:14px;border:1px solid rgba(0,180,255,.35);background:rgba(11,20,48,.6);text-decoration:none;color:var(--text);transition:transform .08s ease, box-shadow .08s ease}
.btn:hover{transform:translateY(-1px);box-shadow:0 0 22px rgba(0,180,255,.16)}
.btn.primary{background:linear-gradient(135deg, rgba(0,180,255,.22), rgba(255,80,120,.12));border-color:rgba(0,180,255,.6)}
.btn.small{padding:8px 12px;border-radius:12px;font-size:.95rem}

.card{background:linear-gradient(180deg, rgba(11,20,48,.95), rgba(8,14,36,.95));border:1px solid rgba(32,58,99,.7);border-radius:18px;padding:18px;margin:16px 0;box-shadow:0 0 50px rgba(0,0,0,.25)}
.card p, .card li{color:var(--text);line-height:1.55}
.muted{color:var(--muted)}
.diagram{width:100%;height:auto;border-radius:14px;border:1px solid rgba(0,180,255,.25);margin-top:10px}

.parts-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:12px;margin-top:14px}
.part{grid-column:span 6;background:rgba(255,255,255,.03);border:1px solid rgba(0,180,255,.16);border-radius:16px;padding:14px}
.part h3{margin:0 0 6px;font-size:1.05rem}
.part p{margin:0 0 10px;color:var(--muted)}
.links{display:flex;flex-direction:column;gap:6px}
.links a{word-break:break-word}

.note{margin-top:14px;padding:14px;border-radius:16px;border:1px solid rgba(255,80,120,.35);background:rgba(255,80,120,.06)}
.note ul{margin:8px 0 0;padding-left:18px}
pre{background:#060a18;border:1px solid rgba(0,180,255,.18);border-radius:16px;padding:14px;overflow:auto}
pre code{color:#eaf6ff}

.video-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:12px}
.video{grid-column:span 6;background:rgba(255,255,255,.03);border:1px solid rgba(0,180,255,.16);border-radius:16px;padding:12px}
.video iframe{width:100%;aspect-ratio:16/9;border:0;border-radius:12px}
.footer{margin:18px 0 50px;text-align:center;color:var(--muted)}
@media (max-width:820px){
  .part{grid-column:span 12}
  .video{grid-column:span 12}
}