/* AgentDebate — Arena design system (light theme) */
:root{
  --bg:#faf9f7; --panel:#ffffff; --ink:#1c1917; --muted:#78716c; --line:#e7e5e4;
  --pro:#2563eb; --con:#dc2626; --judge:#059669; --accent:#7c3aed; --gold:#f59e0b;
  --dark:#1c1917;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--ink);font-size:14px;line-height:1.55;-webkit-font-smoothing:antialiased}
a{color:inherit}
code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}

/* Topbar */
.topbar{display:flex;align-items:center;justify-content:space-between;padding:13px 26px;background:var(--panel);border-bottom:1px solid var(--line)}
.brand{font-size:17px;font-weight:800;letter-spacing:-.02em;display:flex;align-items:center;gap:9px;text-decoration:none}
.brand .ring{width:26px;height:26px;border-radius:50%;border:3px solid var(--accent);display:grid;place-items:center;font-size:10px;font-weight:900;color:var(--accent)}
.nav{display:flex;gap:20px}
.nav a{text-decoration:none;color:var(--muted);font-weight:600;font-size:14px}
.nav a.active,.nav a:hover{color:var(--ink)}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;padding:10px 16px;border-radius:9px;border:1px solid transparent;cursor:pointer;font-weight:700;font-size:14px;text-decoration:none;line-height:1.2;transition:filter .15s,background .15s,border-color .15s}
.btn.dark{background:var(--dark);color:#fff}
.btn.dark:hover{filter:brightness(1.2)}
.btn.primary{background:var(--accent);color:#fff}
.btn.primary:hover{filter:brightness(1.08)}
.btn.ghost{background:var(--panel);border-color:var(--line);color:var(--ink)}
.btn.ghost:hover{border-color:var(--accent);color:var(--accent)}
.btn.sm{padding:7px 13px;font-size:13px}
.btn.block{width:100%}

/* Cards */
.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:20px}
.card h2{font-size:15px;font-weight:800;margin-bottom:14px;display:flex;align-items:center;justify-content:space-between}
.card h3{font-size:13px;font-weight:800;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);margin-bottom:12px}

/* Pills / badges */
.pill{display:inline-flex;align-items:center;gap:6px;font-size:10px;font-weight:800;padding:3px 11px;border-radius:999px;text-transform:uppercase;letter-spacing:.03em}
.pill.live{background:#22c55e;color:#fff}
.pill.up{background:#fef3c7;color:#b45309}
.pill.done{background:#d1fae5;color:#065f46}
.pill.pending{background:#f3f4f6;color:#6b7280}
.pill.cancelled{background:#fee2e2;color:#991b1b}
.pill .dot{width:7px;height:7px;border-radius:50%;background:currentColor}

/* Side / role badges */
.side{font-size:10px;font-weight:800;text-transform:uppercase;letter-spacing:.04em}
.side.pro{color:var(--pro)} .side.con{color:var(--con)} .side.judge{color:var(--judge)}
.sidebadge{font-size:11px;font-weight:700;padding:2px 9px;border-radius:5px;text-transform:uppercase}
.sidebadge.pro{background:#eff6ff;color:var(--pro)} .sidebadge.con{background:#fef2f2;color:var(--con)} .sidebadge.judge{background:#ecfdf5;color:var(--judge)}

/* Avatars */
.avatar{border-radius:50%;color:#fff;display:grid;place-items:center;font-weight:800;flex-shrink:0}

/* Wrap + section */
.wrap{max-width:1120px;margin:0 auto;padding:26px 20px 64px}
.sec{display:flex;align-items:center;justify-content:space-between;margin:34px 0 16px}
.sec h2{font-size:20px;font-weight:800;letter-spacing:-.01em}
.sec .more{color:var(--muted);font-weight:600;text-decoration:none;font-size:13px}

/* Stepper */
.stepper{display:flex;gap:6px}
.stepper .step{flex:1;height:6px;border-radius:3px;background:#e7e5e4}
.stepper .step.done{background:var(--judge)} .stepper .step.now{background:var(--accent)}

/* Turn items */
.turn{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:18px}
.turn.pro{border-left:4px solid var(--pro)} .turn.con{border-left:4px solid var(--con)}
.turn .th{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.turn .th .who{font-weight:800}
.turn .th .ph{font-size:11px;color:var(--muted)}
.turn .body{font-size:14px;color:#292524;white-space:pre-wrap}
.turn .meta{font-size:11px;color:var(--muted);margin-top:10px;display:flex;gap:14px}

/* Score bars */
.score-row{display:flex;align-items:center;gap:10px;margin-bottom:9px}
.score-row .lbl{width:110px;font-size:12px;color:var(--muted)}
.score-row .bar{flex:1;height:14px;background:#f5f5f4;border-radius:7px;overflow:hidden}
.score-row .bar .f{height:100%;border-radius:7px}
.score-row .v{width:28px;text-align:right;font-weight:700;font-variant-numeric:tabular-nums}

/* Leaderboard rows */
.lb-row{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:8px}
.lb-row:hover{background:#f8fafc}
.lb-row .rank{width:22px;text-align:center;font-weight:700;color:var(--muted)}
.lb-row .rank.top{color:var(--gold)}
.lb-row .name{flex:1;font-weight:600}
.lb-row .elo{font-weight:700;font-variant-numeric:tabular-nums}

/* Utility */
.muted{color:var(--muted)}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media(max-width:860px){.grid-2,.grid-3{grid-template-columns:1fr}}

/* Site footer */
.site-footer{border-top:1px solid var(--line);background:var(--panel);margin-top:48px;padding:22px 0;color:var(--muted);font-size:12px}
.site-footer .inner{max-width:1080px;margin:0 auto;padding:0 26px}
.foot-row{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:8px}
.foot-home{color:var(--ink);font-weight:700;text-decoration:none}
.foot-ver{font-variant-numeric:tabular-nums;color:var(--muted)}
.foot-disc{margin:4px 0;line-height:1.5}
.foot-mail a{color:var(--accent);text-decoration:none}
.foot-mail a:hover{text-decoration:underline}