/* 共通テーマ  OIST SECURITY CAMP */
:root{
  --bg:#070b12; --panel:#0d1420; --line:#16324a;
  --neon:#00e5ff; --neon2:#39ff14; --err:#ff4d6d; --gold:#ffd447;
  --ink:#cfe9ff; --dim:#5f7893;
  --mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --sans:system-ui,"Hiragino Kaku Gothic ProN","Noto Sans JP",sans-serif;
}
*{box-sizing:border-box;}
html,body{min-height:100%;}
body{
  margin:0; background:var(--bg); color:var(--ink); font-family:var(--sans);
  background-image:
    radial-gradient(1200px 500px at 50% -10%, rgba(0,229,255,.12), transparent 60%),
    linear-gradient(rgba(0,229,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,229,255,.05) 1px, transparent 1px);
  background-size:auto, 34px 34px, 34px 34px;
  background-attachment:fixed;
}
.neon{color:var(--neon); text-shadow:0 0 12px rgba(0,229,255,.7);}
.blink{color:var(--neon2); animation:blink 1s steps(1) infinite;}
@keyframes blink{50%{opacity:0;}}

/* ふりがな（ルビ）切り替え */
ruby rt{ font-size:.6em; font-weight:400; color:var(--neon); user-select:none; }
html:not(.furigana) ruby rt{ display:none; }   /* OFF時は隠す。ON時はUA既定(ruby-text)で上に表示 */

#furiganaToggle{ position:fixed; bottom:16px; left:16px; z-index:9999; cursor:pointer;
  display:inline-flex; align-items:center; gap:9px; padding:7px 12px;
  background:rgba(11,18,32,.92); border:1px solid var(--line); border-radius:999px;
  font:700 12px/1 var(--sans); letter-spacing:1px; color:var(--dim); }
#furiganaToggle .fg-sw{ position:relative; flex:none; width:32px; height:17px; border-radius:999px; background:#1b2a3d; transition:.15s; }
#furiganaToggle .fg-sw::after{ content:""; position:absolute; top:2px; left:2px; width:13px; height:13px; border-radius:50%; background:var(--dim); transition:.15s; }
#furiganaToggle[aria-pressed="true"]{ color:var(--neon2); border-color:rgba(57,255,20,.5); box-shadow:0 0 16px rgba(57,255,20,.25); }
#furiganaToggle[aria-pressed="true"] .fg-sw{ background:linear-gradient(90deg,#00e5ff,#39ff14); }
#furiganaToggle[aria-pressed="true"] .fg-sw::after{ left:17px; background:#04121a; }