:root{--bg:#0b1220;--panel:#111b2e;--deep:#0c1526;--ink:#eaf1ff;--sub:#8ea3c4;--line:#25324a;--pos:#ff9d5c;--neg:#5cc8ff;--accent:#ffd166;--on:#1e3358}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;font-family:"Hiragino Sans","Yu Gothic UI","Meiryo",system-ui,sans-serif;background:var(--bg);color:var(--ink);display:flex;overflow:hidden}
#side{width:272px;background:#09101c;border-right:1px solid var(--line);display:flex;flex-direction:column;flex:none}
#side h1{font-size:15px;margin:0;padding:14px 16px 4px;color:var(--ink);letter-spacing:.02em}
#side h1 small{display:block;font-size:11px;font-weight:400;color:var(--sub);margin-top:2px}
#search{margin:8px 12px;padding:8px 10px;border-radius:9px;border:1px solid var(--line);background:var(--panel);color:var(--ink);font-size:13px}
#search::placeholder{color:#5d7090}
#menu{overflow:auto;flex:1;padding:0 8px 12px}
#menu summary{cursor:pointer;padding:8px 10px;font-weight:700;font-size:13px;color:var(--sub);border-radius:8px;list-style:none}
#menu summary::-webkit-details-marker{display:none}
#menu summary::before{content:"▸ ";color:#566a8c}
#menu details[open]>summary::before{content:"▾ "}
#menu summary:hover{background:var(--panel);color:var(--ink)}
#menu a{display:block;padding:5px 10px 5px 24px;color:#b9c8e2;text-decoration:none;font-size:12.5px;border-radius:7px;line-height:1.4}
#menu a:hover{background:#16233a}
#menu a.on{background:var(--on);color:#fff;font-weight:600}
#credit{font-size:10.5px;color:#60718f;padding:9px 14px;border-top:1px solid var(--line);line-height:1.55}
#main{flex:1;overflow:auto;padding:12px 18px 18px;min-width:0}
#bar{display:flex;align-items:center;gap:10px}
#menubtn{display:none}
h2{margin:0;font-size:18px;font-weight:700;letter-spacing:.02em}
#sdesc{color:var(--sub);font-size:12.5px;margin:3px 0 10px;line-height:1.5;max-width:980px}
.layout{display:flex;gap:14px;align-items:flex-start}
.leftPane{flex:1.35 1 0;min-width:0;display:flex;flex-direction:column;gap:8px}
.rightPane{flex:1 1 0;min-width:310px;max-width:520px;display:flex;flex-direction:column;gap:10px}
.stage{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:8px;display:flex;justify-content:center}
#stagewrap:fullscreen{background:var(--bg);padding:12px;display:flex;flex-direction:column;justify-content:center}
#cv{display:block;width:100%;height:auto;aspect-ratio:8/5;max-height:calc(100vh - 215px);border-radius:8px;touch-action:none;cursor:crosshair;background:var(--bg)}
#stagewrap:fullscreen #cv{max-height:calc(100vh - 90px)}
#status{display:none;justify-content:space-between;align-items:baseline;gap:10px;padding:9px 14px;background:var(--deep);border:1px solid var(--line);border-radius:10px;font-size:13px}
#status .label{color:var(--sub)}#status .val{font-size:15px;font-weight:700}
.val.strong{color:var(--pos)}.val.weak{color:var(--neg)}
#ctrl{display:flex;gap:8px;align-items:center;flex-wrap:wrap;font-size:12.5px;color:var(--sub)}
#ctrl input[type=range]{width:110px;vertical-align:middle}
button{background:#182849;color:var(--ink);border:1px solid var(--line);border-radius:8px;padding:7px 14px;cursor:pointer;font-size:12.5px;font-weight:700;font-family:inherit}
button:hover{background:#213460}button:active{background:#2a4172}
#subbox .subbox{display:flex;flex-direction:column;gap:2px;margin-bottom:8px}
.subtitle{font-size:13px;font-weight:700}.subsub{font-size:11.5px;color:var(--sub);line-height:1.45;margin-bottom:3px}
.subbox canvas{display:block;width:100%;height:auto;border-radius:8px}
#panel{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.ctl{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:8px 10px;font-size:12.5px;min-width:0}
.ctl.full,.ro.full,.note.full,.legend.full{grid-column:1/-1}
.ctl label{display:flex;justify-content:space-between;gap:6px;color:var(--sub);margin-bottom:4px;font-size:12px}
.ctl label b{color:var(--ink);font-weight:700;font-variant-numeric:tabular-nums;white-space:nowrap}
.ctl input[type=range]{width:100%;accent-color:var(--accent);margin:0}
.ctl label.chk{display:block;margin:0;color:var(--ink);cursor:pointer}
.ctl select{width:100%;background:var(--deep);color:var(--ink);border:1px solid var(--line);border-radius:6px;padding:5px}
.seglabel{font-size:11.5px;color:var(--sub);margin-bottom:5px}
.seg{display:flex;flex-wrap:wrap;gap:3px;background:var(--deep);border:1px solid var(--line);border-radius:9px;padding:3px}
.seg button{flex:1 1 auto;background:transparent;border:none;color:var(--sub);font-size:12px;font-weight:600;padding:6px 8px;border-radius:6px;white-space:nowrap}
.seg button:hover{color:var(--ink);background:#14213a}
.seg button.on{background:var(--on);color:#fff}
.sbtn{grid-column:1/-1;background:#182849}
.ro{background:var(--deep);border:1px solid var(--line);border-radius:10px;padding:8px 12px;font-size:12.5px;display:flex;justify-content:space-between;gap:10px;align-items:baseline}
.rolab{color:var(--sub);flex:none}.roval{color:var(--accent);font-weight:700;text-align:right;font-variant-numeric:tabular-nums;overflow-wrap:anywhere}
.note{font-size:12px;color:var(--sub);line-height:1.6;margin:2px 2px}
.legend{display:flex;flex-wrap:wrap;gap:6px 14px;font-size:11.5px;color:var(--sub)}
.legend span{display:flex;align-items:center;gap:5px}.legend i{width:9px;height:9px;border-radius:50%;display:inline-block}
@media (max-width:1050px){.layout{flex-direction:column}.rightPane{max-width:none;width:100%;min-width:0}#cv{max-height:none}}
@media (max-width:820px){
 #side{position:fixed;left:0;top:0;bottom:0;z-index:5;transform:translateX(-100%);transition:.2s}
 body.menuopen #side{transform:none;box-shadow:0 0 40px #000}
 #menubtn{display:inline-block}#main{padding:10px 12px}
}
#stitle{margin:0;font-size:18px;font-weight:700;letter-spacing:.02em}
#side h1 a{color:inherit;text-decoration:none}
.crumb{font-size:12.5px;color:var(--sub);line-height:1.6}.crumb a{color:var(--neg);text-decoration:none}.crumb a:hover{text-decoration:underline}
.doc{max-width:980px;margin:28px 0 8px;border-top:1px solid var(--line);padding-top:4px}.doc h2{font-size:15px;color:var(--accent);margin:1.6em 0 .4em}.doc p,.doc li{color:#c8d6ee;line-height:1.85;font-size:14px;margin:.3em 0}.doc a{color:var(--neg)}.doc ul{padding-left:1.3em;margin:.3em 0}
.pn{display:flex;gap:10px;flex-wrap:wrap;margin:10px 0}.pn a{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:8px 14px;text-decoration:none;color:var(--ink);font-size:13px}.pn a:hover{background:#16233a}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:10px;margin:8px 0 18px}.card{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:12px 14px;text-decoration:none;color:var(--ink);display:block}.card:hover{background:#16233a}.card b{display:block;font-size:14px;margin-bottom:4px;line-height:1.5}.card span{color:var(--sub);font-size:12px;line-height:1.55;display:block}
.lead{max-width:860px;color:#c8d6ee;line-height:1.85;font-size:14.5px}.page h2{font-size:17px;margin:1.6em 0 .5em}.page h2 a{color:var(--ink);text-decoration:none}.page h2 small{color:var(--sub);font-weight:400;font-size:12.5px;margin-left:8px}
.sitefoot{margin-top:36px;color:#8ea3c4;font-size:12px;line-height:1.8}.sitefoot a{color:#8ea3c4}.adslot{margin:18px 0;max-width:980px}

/* トップ・分野別一覧ページ専用（公開サイト用）。シミュレーションのページには影響しない */
body.home{display:block;overflow:auto;height:auto;min-height:100%;font-size:15px;line-height:1.7;-webkit-text-size-adjust:100%}
body.home a{color:inherit}
.home :focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
.home .top{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px max(16px,calc((100% - 1160px)/2));background:rgba(9,16,28,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.home .brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:16px;text-decoration:none;letter-spacing:.02em}
.home .brand svg{width:26px;height:26px;flex:none}
.home .top nav{display:flex;gap:4px}
.home .top nav a{padding:6px 12px;border-radius:8px;font-size:13.5px;text-decoration:none;color:var(--sub)}
.home .top nav a:hover{background:var(--panel);color:var(--ink)}
.home .wrap{max-width:1160px;margin:0 auto;padding:0 16px 24px}
.home .hero{padding:44px 0 22px;text-align:center}
.home .hero h1{margin:0;font-size:clamp(24px,4.2vw,36px);line-height:1.35;letter-spacing:.02em}
.home .hero h1 em{font-style:normal;color:var(--accent)}
.home .hero p{margin:12px auto 0;max-width:640px;color:var(--sub);font-size:15px}
.home .sbox{position:relative;max-width:680px;margin:26px auto 0}
.home .sbox svg{position:absolute;left:16px;top:50%;transform:translateY(-50%);width:20px;height:20px;color:var(--sub);pointer-events:none}
.home #q{width:100%;padding:15px 46px 15px 46px;border-radius:14px;border:1.5px solid #34466a;background:var(--panel);color:var(--ink);font-size:17px;font-family:inherit;box-shadow:0 6px 24px rgba(0,0,0,.28)}
.home #q::placeholder{color:#6b7fa3}
.home #q:focus{outline:none;border-color:var(--neg);box-shadow:0 0 0 3px rgba(92,200,255,.18),0 6px 24px rgba(0,0,0,.28)}
.home #q::-webkit-search-cancel-button{display:none}
.home #qclr{position:absolute;right:8px;top:50%;transform:translateY(-50%);width:34px;height:34px;padding:0;border-radius:50%;background:transparent;border:none;color:var(--sub);font-size:20px;line-height:1}
.home #qclr:hover{background:#1a2a48;color:var(--ink)}
.home .tags{margin:14px auto 0;max-width:760px;display:flex;flex-wrap:wrap;gap:8px;justify-content:center;align-items:center;font-size:13px;color:var(--sub)}
.home .tag{padding:5px 13px;border-radius:999px;background:transparent;border:1px solid var(--line);color:#b9c8e2;font-size:13px;font-weight:500}
.home .tag:hover{background:#16233a;border-color:#3b5078;color:var(--ink)}
.home .cats{display:flex;gap:8px;flex-wrap:wrap;margin:26px 0 6px;padding-bottom:14px;border-bottom:1px solid var(--line)}
.home .chip{display:inline-flex;align-items:center;gap:7px;padding:8px 14px;border-radius:10px;background:var(--panel);border:1px solid var(--line);color:#c8d6ee;font-size:14px;font-weight:600;text-decoration:none;cursor:pointer;font-family:inherit}
.home .chip i{font-style:normal;font-size:12px;color:var(--sub);font-weight:500}
.home .chip::before{content:"";width:9px;height:9px;border-radius:50%;background:var(--cc,#8ea3c4);flex:none}
.home .chip:hover{background:#16233a;border-color:#3b5078}
.home .chip.on{background:#1e3358;border-color:var(--cc,#5cc8ff);color:#fff}
.home #rinfo{margin:16px 2px 4px;color:var(--sub);font-size:14px;min-height:1.7em}
.home #rinfo b{color:var(--ink)}
.home .sec{margin-top:22px}
.home .sec h2{display:flex;align-items:baseline;gap:10px;margin:0 0 10px;font-size:19px;letter-spacing:.02em}
.home .sec h2::before{content:"";align-self:center;width:6px;height:20px;border-radius:3px;background:var(--cc,#8ea3c4)}
.home .sec h2 a{text-decoration:none}.home .sec h2 a:hover{text-decoration:underline}
.home .sec h2 small{color:var(--sub);font-weight:400;font-size:13px}
.home .cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:12px;margin:0}
.home .card{position:relative;display:flex;flex-direction:column;padding:0;border-radius:14px;background:var(--panel);border:1px solid var(--line);text-decoration:none;transition:transform .12s,border-color .12s,background .12s;overflow:hidden}
.home .card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--cc,#8ea3c4)}
.home .card:hover{transform:translateY(-2px);border-color:var(--cc,#5cc8ff);background:#15233b}
.home .card .cx{display:flex;flex-direction:column;gap:6px;padding:13px 16px 14px 19px}
.home .card .th{display:block;width:100%;height:auto;aspect-ratio:8/5;object-fit:cover;background:#0b1220;border-bottom:1px solid var(--line)}
.home .card b{font-size:15px;line-height:1.5;font-weight:700;color:var(--ink)}
.home .card .cd{color:var(--sub);font-size:13px;line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.home .card .cb{align-self:flex-start;font-size:11.5px;color:var(--cc,#8ea3c4);font-weight:700;letter-spacing:.04em}
.home mark{background:rgba(255,209,102,.28);color:#fff;border-radius:3px;padding:0 1px}
.home #empty{margin:34px auto;max-width:520px;text-align:center;color:var(--sub)}
.home #empty strong{display:block;color:var(--ink);font-size:17px;margin-bottom:6px}
.home .foot{margin-top:46px;padding-top:18px;border-top:1px solid var(--line);color:#8ea3c4;font-size:13px;line-height:1.9;text-align:center}
.home .foot a{color:#9fb4d6}
.home .kbd{display:inline-block;padding:0 6px;border:1px solid #3b5078;border-radius:5px;font-size:12px;color:var(--sub)}
.c-mecha{--cc:#ff9d5c}.c-thermo{--cc:#ff7a7a}.c-wave{--cc:#5cc8ff}.c-sound{--cc:#6fe0b0}.c-light{--cc:#ffd166}.c-ele{--cc:#b79cff}.c-mag{--cc:#ff8fd0}.c-induc{--cc:#52dede}.c-ac{--cc:#a3e063}.c-other{--cc:#9aa8c2}.c-ryomon{--cc:#f4f1de}
@media (max-width:640px){
  .home .hero{padding:28px 0 14px}
  .home .brand{font-size:14px;gap:8px}.home .brand svg{width:22px;height:22px}
  .home .top nav a:first-child{display:none}.home .top nav a{padding:6px 8px;font-size:12.5px;white-space:nowrap}
  .home .cats{flex-wrap:nowrap;overflow-x:auto;margin-left:-16px;margin-right:-16px;padding-left:16px;padding-right:16px;scrollbar-width:none}
  .home .chip{flex:none}
  .home .cards{grid-template-columns:1fr}
  .home #q{font-size:16px}
}
@media (prefers-reduced-motion:reduce){.home .card{transition:none}.home .card:hover{transform:none}}

/* 「すべて／良問」のタブ */
.home .tabs{display:flex;gap:10px;flex-wrap:wrap;margin:24px 0 0}
.home .tab{display:inline-flex;align-items:center;gap:10px;padding:12px 20px;border-radius:12px;background:var(--panel);border:1.5px solid var(--line);color:#c8d6ee;font-size:15px;font-weight:700;text-decoration:none}
.home .tab i{font-style:normal;font-size:12.5px;color:var(--sub);font-weight:500}
.home .tab:hover{background:#16233a;border-color:#3b5078}
.home .tab.pick{border-color:#c9bf8a;color:#f4f1de}
.home .tab.on{background:#1e3358;border-color:var(--neg);color:#fff}
.home .tab.pick.on{border-color:#f4f1de}
.home .top nav a.navpick{color:#f4f1de;font-weight:700;border:1px solid #6b6648}
.home .top nav a.navpick:hover{background:#26243a}
#sidetabs{display:flex;gap:6px;margin:4px 12px 2px}
#sidetabs a{flex:1;text-align:center;padding:6px 8px;border-radius:8px;border:1px solid var(--line);background:var(--panel);color:#c8d6ee;text-decoration:none;font-size:12.5px;font-weight:700}
#sidetabs a:hover{background:#16233a}
#sidetabs a.pick{color:#f4f1de;border-color:#6b6648}
#sidetabs a.on{background:var(--on);color:#fff}
@media (max-width:640px){.home .tab{padding:10px 14px;font-size:14px;flex:1 1 100%}.home .top nav a.navpick{display:inline-block}}