:root{--bg1:#0f1020;--bg2:#1a1140;--neon:#7cf7ff;--pink:#ff5cd6;--txt:#eef3ff}
*{box-sizing:border-box}
body{margin:0;font-family:Inter,Segoe UI,Arial,sans-serif;color:var(--txt);min-height:100vh;background:linear-gradient(130deg,var(--bg1),var(--bg2));}
.bg{position:fixed;inset:0;z-index:-1;opacity:.75;filter:blur(20px);background:radial-gradient(circle at 20% 20%,#2a2f80 0,transparent 30%),radial-gradient(circle at 80% 30%,#7a1b75 0,transparent 28%),radial-gradient(circle at 50% 80%,#1f6e8a 0,transparent 30%)}
.hero{max-width:1100px;margin:20px auto;padding:20px;border-radius:18px;text-align:center}
.glass{background:rgba(255,255,255,.08);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.18);box-shadow:0 10px 30px rgba(0,0,0,.25)}
h1{margin:0 0 8px;text-shadow:0 0 12px var(--neon),0 0 20px var(--pink)}
.grid{max-width:1100px;margin:0 auto;padding:0 14px 20px;display:grid;grid-template-columns:1fr;gap:16px}
.card{padding:16px;border-radius:16px}
.full{grid-column:1/-1}
.toolbar{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:10px}
input,button{border-radius:10px;border:1px solid rgba(255,255,255,.24);padding:8px 10px;background:rgba(0,0,0,.25);color:#fff}
button{cursor:pointer;background:linear-gradient(45deg,var(--neon),var(--pink));color:#101321;font-weight:700;border:none}
#board{width:100%;max-width:960px;display:block;border:1px solid rgba(255,255,255,.25);border-radius:12px;background:#0a0a15;image-rendering:pixelated;cursor:crosshair}
.hint{opacity:.8;font-size:.9rem}
.commentBox{display:flex;gap:8px;flex-wrap:wrap}
.commentBox input{flex:1;min-width:180px}
#wall{list-style:none;padding:0;margin:10px 0 0}
#wall li{margin:7px 0;padding:8px 10px;border-radius:10px;background:rgba(255,255,255,.08)}
.tip{font-size:.9rem;opacity:.9;min-height:1.2rem}
footer{text-align:center;padding:12px;opacity:.8}