:root{color-scheme:dark;--bg:#102c36;--panel:#1b3e48;--line:#365660;--ink:#eaf5ed;--muted:#a8c5c8;--mint:#a9dcc4;--gold:#f1cb84}*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 20% 0,#215361,var(--bg) 65%);color:var(--ink);font:16px/1.5 system-ui,sans-serif}main{max-width:1160px;margin:auto;padding:20px}header{display:flex;align-items:center;gap:24px;margin-bottom:20px}header div{flex:1}h1,h2,p{margin:0}h1{font-size:28px;letter-spacing:-1px}h2{font-size:20px}small{font-size:12px;letter-spacing:1px;color:var(--muted)}a{color:var(--mint)}button,select{font:inherit;color:var(--ink);background:#294d57;border:1px solid var(--line);padding:10px 14px;border-radius:12px;min-height:44px;cursor:pointer}button:hover:enabled{background:#3b6570}button:disabled{opacity:.5;cursor:default}button:focus-visible,select:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid var(--gold);outline-offset:3px}.game-layout{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:20px;align-items:start}.arena-card,.panel{background:var(--panel);border:1px solid var(--line);border-radius:22px;overflow:hidden}.arena-top{display:flex;align-items:center;justify-content:space-between;padding:18px 20px}.auto{font-size:12px;letter-spacing:1px;color:var(--mint)}canvas{display:block;width:100%;height:auto;background:#246a74}.battle-bottom{display:flex;align-items:center;gap:20px;padding:16px 20px 8px}.health{flex:1}.health span{font-size:14px}progress{width:100%;height:10px;accent-color:var(--mint);display:block;margin:6px 0}#burst{background:var(--gold);color:#243b3b;font-weight:750}#event{font-size:14px;color:var(--mint);padding:8px 20px;min-height:56px}.route{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:12px 20px 20px;border-top:1px solid var(--line)}.check{font-size:14px;display:flex;gap:8px;align-items:center}.check input{width:20px;height:20px;accent-color:var(--mint)}aside{display:grid;gap:14px}.panel{padding:18px}.hero-title,.numbers{display:flex;justify-content:space-between;align-items:center;gap:8px}.hero-title select{font-size:14px;padding:6px}.power{padding:14px 0}.power strong{font-size:48px;line-height:1.2;display:block;color:var(--gold);letter-spacing:-2px}.power span{font-size:12px;letter-spacing:2px}.numbers{font-size:14px}.muted{color:var(--muted);font-size:14px}#upgrades{display:grid;gap:8px;margin-top:14px}#upgrades button{display:flex;justify-content:space-between;text-align:left;font-size:14px}#upgrades small{display:block;font-size:12px;letter-spacing:0}.gear p{font-size:14px;color:var(--muted);margin:8px 0 12px}.gear button{width:100%}.help{margin-top:18px;border-top:1px solid var(--line);padding:14px 0}.help p{max-width:80ch;margin:12px 0;color:var(--muted)}summary{cursor:pointer}#saveStatus{margin-top:8px}@media(max-width:800px){.game-layout{grid-template-columns:1fr}aside{grid-template-columns:repeat(2,minmax(0,1fr))}.gear{grid-column:1/-1}}@media(max-width:460px){main{padding:10px}header{gap:12px;margin-bottom:12px}header small{font-size:10px}h1{font-size:23px}header a{font-size:14px}.arena-top{padding:12px}.battle-bottom{padding:12px;gap:10px}.route{padding:12px}.auto{font-size:10px}aside{grid-template-columns:1fr 1fr;gap:10px}.panel{padding:12px}.hero-title{flex-wrap:wrap}#upgrades button{padding:8px;flex-wrap:wrap}.power strong{font-size:38px}.numbers{flex-wrap:wrap}}