:root{--bg:#0f1217;--fg:#e8ecf1;--muted:#8b95a5;--card:#171c24;--accent:#3b82f6;--err:#f87171}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.5 system-ui,sans-serif}main{max-width:880px;margin:0 auto;padding:24px 16px}.card{background:var(--card);border-radius:12px;padding:16px;margin:12px 0}button,input{font:inherit;padding:10px 12px;border-radius:8px;border:1px solid #2a3240;background:#0f1217;color:var(--fg);width:100%;margin:6px 0}button{background:var(--accent);border:0;cursor:pointer;font-weight:600}.muted{color:var(--muted)}.err{color:var(--err)}table{width:100%;border-collapse:collapse}td,th{text-align:left;padding:8px 4px;border-bottom:1px solid #2a3240}