:root{
    --ink:#1c2430; --paper:#f6f4ee; --line:#d8d3c6;
    --accent:#e84e3c; --go:#2f9e63;
    color-scheme:light;
  }
  html[data-ui-theme="dark"]{color-scheme:dark}
  html[data-ui-theme="light"]{color-scheme:light}
  *{margin:0;padding:0;box-sizing:border-box}
  html,body{width:100%;height:100%;overflow:hidden;background:var(--ink);
    font-family:'IBM Plex Sans KR',sans-serif;color:var(--ink);
    -webkit-user-select:none;user-select:none}
  #game{position:fixed;inset:0;display:block}
  #loadError{position:fixed;inset:0;z-index:50;display:flex;flex-direction:column;
    align-items:center;justify-content:center;gap:10px;padding:24px;text-align:center;
    background:var(--paper);color:var(--ink)}
  #loadError strong{font-family:'Jua',sans-serif;font-size:26px;color:var(--accent)}
  #loadError span{font-size:14px;color:#6b6a63}
  .jua{font-family:'Jua',sans-serif}
  .screen{position:fixed;inset:0;display:flex;flex-direction:column;
    align-items:center;justify-content:center;background:var(--paper);z-index:20;overflow-y:auto}
  .hidden{display:none !important}