:root{
  --bg:#0f172a; /* slate-900 */
  --card:#111827; /* gray-900 */
  --muted:#94a3b8; /* slate-400 */
  --primary:#22c55e; /* green-500 */
  --primary-600:#16a34a;
  --danger:#ef4444;
  --ring:#3b82f6;
  --text:#e5e7eb;
}
*{box-sizing:border-box}
body{
  margin:0; font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Noto Sans KR, Apple SD Gothic Neo, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: radial-gradient(1000px 600px at 10% -10%, #1f2937 0, transparent 70%), var(--bg);
  color:var(--text);
}
.site-header{
  display:flex; align-items:center; justify-content:space-between;
  padding:16px 24px; border-bottom:1px solid rgba(255,255,255,.06); position:sticky; top:0; backdrop-filter: blur(6px); background:rgba(15,23,42,.7);
}
.brand{display:flex; align-items:center; gap:10px}
.brand-icon{width:28px; height:28px; filter: drop-shadow(0 0 8px rgba(255,255,255,.12));}
.brand-name{font-weight:800; letter-spacing:.02em}
.nav{display:flex; gap:12px}
.nav-link{display:flex; align-items:center; gap:6px; padding:8px 12px; border-radius:999px; background:rgba(255,255,255,.06); text-decoration:none; color:var(--text);}
.nav-link:hover{outline:2px solid rgba(255,255,255,.08)}
.nav-icon{width:18px; height:18px}

.container{max-width:1100px; margin:0 auto; padding:24px}
.container.narrow{max-width:720px}
.hero{display:grid; gap:16px; margin-top:8px}
.cards{display:grid; grid-template-columns:repeat(auto-fit, minmax(220px,1fr)); gap:16px; margin-top:8px}
.card{background:linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.02)); border:1px solid rgba(255,255,255,.08); padding:18px; border-radius:16px; text-decoration:none; color:var(--text); display:grid; gap:8px}
.card:hover{outline:2px solid rgba(255,255,255,.1)}
.card-icon{width:36px; height:36px}
h1{font-size:28px; margin:.2em 0 .4em}
h2{font-size:18px; margin:.2em 0 .2em}
h3{font-size:16px; margin:.2em 0 .2em}
p.hint{color:var(--muted); font-size:14px}

.btn{border:1px solid rgba(255,255,255,.08); background:rgba(255,255,255,.06); color:var(--text); padding:10px 14px; border-radius:12px; cursor:pointer}
.btn:hover{outline:2px solid rgba(255,255,255,.12)}
.btn.primary{background: linear-gradient(180deg, rgba(34,197,94,.25), rgba(34,197,94,.2)); border-color: rgba(34,197,94,.35)}
.btn.primary:hover{outline:2px solid rgba(34,197,94,.45)}
.btn.danger{background: linear-gradient(180deg, rgba(239,68,68,.25), rgba(239,68,68,.2)); border-color: rgba(239,68,68,.35)}
.btn-icon{width:18px; height:18px; vertical-align:middle; margin-right:4px}

.result-box{margin-top:16px; display:flex; align-items:center; gap:10px; padding:16px; background:rgba(255,255,255,.04); border:1px solid rgba(255,255,255,.08); border-radius:16px}
.result-icon{width:28px; height:28px}

.balls{display:flex; gap:10px; flex-wrap:wrap; margin-top:16px}
.ball{width:56px; height:56px; border-radius:50%; display:grid; place-items:center; border:1px solid rgba(255,255,255,.1); background: radial-gradient(circle at 30% 30%, rgba(255,255,255,.25), rgba(255,255,255,.05)); font-weight:700; font-size:18px}

.ladder-controls{display:flex; gap:8px; align-items:center; flex-wrap:wrap; margin-bottom:10px}
.ladder-inputs{display:grid; grid-template-columns:1fr 1fr; gap:16px; margin:12px 0 18px}
.grid-inputs{display:grid; grid-template-columns:repeat(auto-fit, minmax(120px,1fr)); gap:8px}
.grid-inputs input{padding:10px 12px; border-radius:10px; border:1px solid rgba(255,255,255,.12); background:rgba(255,255,255,.04); color:var(--text)}

.ladder-play{display:grid; grid-template-columns:220px 1fr 260px; gap:12px; align-items:start}
.players, .results{background:rgba(255,255,255,.04); border:1px solid rgba(255,255,255,.08); border-radius:16px; padding:12px}
.player-buttons{display:grid; gap:6px}
.player-buttons button{padding:8px 10px; border-radius:10px; background:rgba(255,255,255,.06); border:1px solid rgba(255,255,255,.08); color:var(--text); cursor:pointer}
.player-buttons button:hover{outline:2px solid rgba(255,255,255,.12)}

.canvas-wrap{background:rgba(255,255,255,.04); border:1px solid rgba(255,255,255,.08); border-radius:16px; padding:12px; overflow:auto}
#ladder-canvas{background:linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.01)); display:block; max-width:100%}

#result-table{width:100%; border-collapse: collapse; font-size:14px}
#result-table th, #result-table td{border-bottom:1px solid rgba(255,255,255,.08); padding:6px 8px; text-align:left}
.site-footer{padding:24px; text-align:center; color:var(--muted)}

@media (max-width: 960px){
  .ladder-play{grid-template-columns:1fr;}
  .players{order:1}
  .canvas-wrap{order:2}
  .results{order:3}
}

.brand-link{text-decoration:none;color:inherit;display:flex;align-items:center;gap:10px}