/* Cyber Indigo Theme (static pages) */
:root{
  --bg:#050816;
  --panel:rgba(12, 18, 44, 0.92);
  --panel2:rgba(10, 16, 40, 0.92);
  --line:rgba(122, 162, 255, 0.22);
  --text:#e8eeff;
  --muted:rgba(232,238,255,.72);
  --accent:#7aa2ff;
  --accent2:#9bbcff;
  --btn:#cfd8ff;      /* light indigo */
  --btn2:#b9c8ff;     /* hover */
  --btnText:#1b2a6b;  /* indigo text */
  --radius:14px;
  --shadow:0 18px 50px rgba(0,0,0,.45);
  --maxw: 1040px;
}

*{box-sizing:border-box;}
html,body{height:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans JP","Hiragino Kaku Gothic ProN","Meiryo",sans-serif;
  line-height:1.75;
}

a{color:var(--accent); text-decoration:none;}
a:hover{color:var(--accent2); text-decoration:underline;}

.container{max-width:var(--maxw); margin:0 auto; padding:16px;}
.header{
  position:sticky; top:0; z-index:5;
  backdrop-filter: blur(10px);
  background: rgba(5,8,22,.72);
  border-bottom:1px solid rgba(122,162,255,.18);
}
.brand{
  display:flex; gap:12px; align-items:center; justify-content:space-between;
  padding:12px 16px;
}
.brand-left{display:flex; flex-direction:column; gap:2px;}
.brand-title{font-weight:900; letter-spacing:.02em; color:#cfe0ff;}
.brand-sub{color:var(--muted); font-size:.92rem;}
.navbar{
  display:flex; gap:10px; align-items:center; flex-wrap:wrap;
  padding:0 16px 14px;
}
select.nav{
  background: rgba(6,10,28,.70);
  color: var(--text);
  border:1px solid rgba(122,162,255,.28);
  padding:10px 12px;
  border-radius:12px;
  min-width: 240px;
}
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  background:var(--btn);
  color:var(--btnText);
  border:1px solid rgba(122,162,255,.45);
  padding:10px 14px;
  border-radius:0; /* square */
  font-weight:800;
  box-shadow:0 10px 26px rgba(122,162,255,.18);
}
.btn:hover{background:var(--btn2); text-decoration:none;}
.btn.small{padding:8px 10px; font-size:.95rem;}

.card{
  background:var(--panel);
  border:1px solid var(--line);
  box-shadow:var(--shadow);
  border-radius:var(--radius);
  padding:16px;
  margin:14px 0;
}
.card h1{margin:0 0 10px; color:#cfe0ff; font-size:1.55rem;}
.card h2{margin:22px 0 8px; color:#cfe0ff; font-size:1.15rem;}
.card p{margin:0 0 12px;}
.badge{
  display:inline-block;
  padding:4px 10px;
  border:1px solid rgba(122,162,255,.28);
  background: rgba(6,10,28,.55);
  color: var(--muted);
  border-radius:999px;
  font-size:.85rem;
}

.grid2{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap:14px;
}
@media (max-width: 820px){
  .grid2{grid-template-columns: 1fr;}
  select.nav{width:100%; min-width:0;}
  .navbar{align-items:stretch;}
  .btn{width:auto;}
  .navbar .btn{width:100%;}
}
code{
  background: rgba(6,10,28,.85);
  color:#b8ccff;
  border:1px solid rgba(122,162,255,.18);
  padding:.12em .35em;
  border-radius:10px;
}
pre{
  background:#070b1f;
  border:1px solid rgba(122,162,255,.18);
  padding:12px;
  border-radius:14px;
  overflow:auto;
}
ul{margin:0 0 12px; padding-left: 1.2em;}
li{margin:6px 0;}
hr{border:none;border-top:1px solid rgba(122,162,255,.18); margin:18px 0;}
.footer{
  color:rgba(232,238,255,.55);
  font-size:.9rem;
  padding:22px 0 30px;
}

/* ---- TOC page extra styles ---- */
.toc-title{
  margin:0 0 10px;
  color:#cfe0ff;
  font-size:1.35rem;
  font-weight:900;
  letter-spacing:.02em;
}

.toc-desc{
  margin:0 0 14px;
  color:var(--muted);
  font-size:.95rem;
}

.toc-list{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap:10px 14px;
}

.toc-item{margin:0; padding:0;}

.toc-link{
  display:block;
  padding:12px 12px;
  border-radius:14px;
  border:1px solid rgba(122,162,255,.18);
  background: rgba(6,10,28,.55);
  color:var(--text);
  text-decoration:none;
}

.toc-link:hover{
  background: rgba(6,10,28,.75);
  border-color: rgba(122,162,255,.35);
  text-decoration:none;
}

.toc-link .t{
  display:block;
  font-weight:800;
  color:#cfe0ff;
}

.toc-link .u{
  display:block;
  margin-top:2px;
  font-size:.85rem;
  color:rgba(232,238,255,.55);
}

.footer{
  color:rgba(232,238,255,.55);
  font-size:.9rem;
  padding:10px 0 0;
}

@media (max-width: 820px){
  .toc-list{grid-template-columns: 1fr;}
}

/* =========================================================
   Static pages header (logo + menu + right button) - v202602110643
   ========================================================= */
.site-logo{display:inline-flex;align-items:center;text-decoration:none;}
.site-logo-img{height:52px;width:auto;display:block;}

.headerbar.headerbar-split{
  max-width: var(--maxw);
  margin: 0 auto;
  display:flex;
  gap:12px;
  align-items:center;
  padding:12px 16px;
}

.headerbar.headerbar-split .header-spacer{
  flex: 1 1 auto;
  min-width: 8px;
}

.headerbar.headerbar-split select.nav.nav-wide{
  flex: 0 1 520px;
  min-width: 240px;
  max-width: 520px;
}

.headerbar.headerbar-split .btn.btn-nav{
  flex: 0 0 auto;
  white-space: nowrap;
  width: auto !important;
}

@media (max-width: 820px){
  .headerbar.headerbar-split{flex-wrap:wrap;}
  .headerbar.headerbar-split select.nav.nav-wide{
    flex: 1 1 100%;
    width: 100%;
    max-width: none;
  }
  .headerbar.headerbar-split .header-spacer{display:none;}
  .headerbar.headerbar-split .btn.btn-nav{width:100% !important;}
}