:root{
  --bg:#0b0f19;
  --panel:#121a2c;
  --panel2:#0f1626;
  --text:#e9eefb;
  --muted:#a9b4d6;
  --line:rgba(255,255,255,.12);
  --accent:#7dd3fc;
  --accent2:#c084fc;
  --good:#34d399;
  --warn:#fbbf24;
  --bad:#fb7185;
  --shadow: 0 14px 40px rgba(0,0,0,.35);
  --radius: 18px;
  --radius2: 24px;
  --max: 1160px;
}

@media (prefers-color-scheme: light){
  :root{
    --bg:#f7f9ff;
    --panel:#ffffff;
    --panel2:#ffffff;
    --text:#10162a;
    --muted:#3a466c;
    --line:rgba(16,22,42,.14);
    --shadow: 0 12px 30px rgba(16,22,42,.12);
  }
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Noto Sans JP", "Yu Gothic", "Meiryo", Arial, sans-serif;
  background: radial-gradient(1200px 700px at 20% -10%, rgba(125,211,252,.25), transparent 55%),
              radial-gradient(1000px 600px at 85% 0%, rgba(192,132,252,.22), transparent 60%),
              radial-gradient(1100px 700px at 50% 110%, rgba(52,211,153,.14), transparent 55%),
              var(--bg);
  color:var(--text);
  line-height:1.55;
}
a{color:inherit}
.wrap{max-width:var(--max); margin:0 auto; padding:0 18px}
.topbar{
  position:sticky; top:0; z-index:30;
  backdrop-filter:saturate(140%) blur(10px);
  background: linear-gradient(to bottom, rgba(11,15,25,.78), rgba(11,15,25,.45));
  border-bottom: 1px solid var(--line);
}
@media (prefers-color-scheme: light){
  .topbar{background: rgba(247,249,255,.86)}
}
.nav{
  display:flex; align-items:center; justify-content:space-between;
  padding:12px 0;
  gap:14px;
}
.brand{
  display:flex; align-items:center; gap:10px;
  text-decoration:none;
  min-width: 240px;
}
.mark{
  width:40px; height:40px; border-radius:12px;
  background: conic-gradient(from 210deg, var(--accent), var(--accent2), var(--good), var(--accent));
  box-shadow: var(--shadow);
  position:relative;
}
.mark:after{
  content:"";
  position:absolute; inset:9px;
  border-radius:10px;
  background: rgba(0,0,0,.25);
  border:1px solid rgba(255,255,255,.18);
}
.brand b{font-size:15px; letter-spacing:.2px}
.brand small{display:block; color:var(--muted); font-size:12px; margin-top:1px}
.menu{
  display:flex; flex-wrap:wrap; gap:10px;
  align-items:center; justify-content:flex-end;
}
.pill{
  display:inline-flex; align-items:center; gap:8px;
  padding:9px 12px;
  border-radius:999px;
  border:1px solid var(--line);
  text-decoration:none;
  background: rgba(255,255,255,.04);
  font-size:13px;
  color:var(--text);
  transition: transform .14s ease, background .14s ease, border-color .14s ease;
  white-space:nowrap;
}
.pill:hover{
  transform: translateY(-1px);
  background: rgba(125,211,252,.10);
  border-color: rgba(125,211,252,.35);
}
.pill.primary{
  background: linear-gradient(135deg, rgba(125,211,252,.20), rgba(192,132,252,.18));
  border-color: rgba(255,255,255,.20);
}
.pill.primary:hover{
  background: linear-gradient(135deg, rgba(125,211,252,.28), rgba(192,132,252,.24));
  border-color: rgba(125,211,252,.42);
}
.pill.lang{
  opacity:.95;
  border-color: rgba(255,255,255,.22);
}

.card{
  border: 1px solid var(--line);
  border-radius: var(--radius2);
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.02));
  box-shadow: var(--shadow);
  overflow:hidden;
}
@media (prefers-color-scheme: light){ .card{background:#fff;} }

.section{padding: 22px 0}
h1{
  margin:0 0 10px;
  font-size: 30px;
  line-height:1.14;
  letter-spacing: .2px;
}
h2{
  margin: 0 0 10px;
  font-size: 18px;
  letter-spacing:.2px;
}
.sub{
  margin:0 0 18px;
  color: var(--muted);
  font-size: 15px;
  max-width: 78ch;
}
.lead{
  margin:0 0 14px;
  color: var(--muted);
  font-size: 14px;
  max-width: 90ch;
}
.kicker{
  display:inline-flex; gap:8px; align-items:center;
  padding:6px 10px;
  border-radius:999px;
  background: rgba(125,211,252,.12);
  border: 1px solid rgba(125,211,252,.28);
  color: var(--text);
  font-size: 12px;
  letter-spacing: .2px;
  margin-bottom: 14px;
}
.kicker .dot{
  width:8px; height:8px; border-radius:99px; background: var(--accent);
  box-shadow: 0 0 0 4px rgba(125,211,252,.16);
}
.breadcrumbs{
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 12.5px;
}
.breadcrumbs a{
  text-decoration:none;
  border-bottom:1px dashed var(--line);
}
.breadcrumbs a:hover{border-bottom-color: rgba(125,211,252,.55)}

.grid{
  display:grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 14px;
}
.col12{grid-column: span 12;}
.col8{grid-column: span 8;}
.col6{grid-column: span 6;}
.col4{grid-column: span 4;}
@media (max-width: 980px){
  .col8,.col6,.col4{grid-column: span 12;}
}

.panel{
  border: 1px solid var(--line);
  border-radius: var(--radius2);
  background: rgba(255,255,255,.03);
  padding: 16px 16px 14px;
  box-shadow: var(--shadow);
  position:relative;
  overflow:hidden;
}
@media (prefers-color-scheme: light){ .panel{background:#fff;} }
.panel:before{
  content:"";
  position:absolute; inset:-2px;
  background: radial-gradient(600px 180px at 20% 0%, rgba(125,211,252,.12), transparent 55%),
              radial-gradient(520px 180px at 90% 0%, rgba(192,132,252,.10), transparent 55%);
  pointer-events:none;
}
.panel > *{position:relative}
.panel h3{margin:0 0 6px; font-size:16px; letter-spacing:.2px;}
.panel p{margin:0 0 12px; color:var(--muted); font-size:13.5px;}

.ctaRow{display:flex; flex-wrap:wrap; gap:10px; margin: 12px 0 0;}
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:10px;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  text-decoration:none;
  background: rgba(255,255,255,.04);
  color: var(--text);
  font-weight: 700;
  font-size: 14px;
  transition: transform .14s ease, border-color .14s ease, background .14s ease;
}
.btn:hover{transform: translateY(-1px); border-color: rgba(125,211,252,.38); background: rgba(125,211,252,.10);}
.btn.primary{
  background: linear-gradient(135deg, rgba(125,211,252,.28), rgba(192,132,252,.22));
  border-color: rgba(125,211,252,.36);
}
.btn.primary:hover{
  background: linear-gradient(135deg, rgba(125,211,252,.36), rgba(192,132,252,.28));
  border-color: rgba(125,211,252,.52);
}

.list{
  margin:0; padding:0; list-style:none;
  display:grid; gap:8px;
}
.list a{
  display:flex; align-items:flex-start; gap:10px;
  text-decoration:none;
  padding:10px 10px;
  border-radius: 14px;
  border:1px solid var(--line);
  background: rgba(255,255,255,.02);
  transition: transform .14s ease, border-color .14s ease, background .14s ease;
}
.list a:hover{
  transform: translateY(-1px);
  border-color: rgba(125,211,252,.34);
  background: rgba(125,211,252,.08);
}
.bullet{
  width:10px; height:10px; margin-top: 4px;
  border-radius: 99px;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(125,211,252,.12);
  flex:0 0 10px;
}
.list b{display:block; font-size: 13.5px; margin-bottom: 2px;}
.list span{display:block; color: var(--muted); font-size: 12.5px; line-height: 1.4;}

.note{
  margin-top: 12px;
  padding: 12px 14px;
  border-radius: var(--radius);
  border:1px solid var(--line);
  background: rgba(255,255,255,.02);
  color: var(--muted);
  font-size: 12.8px;
}
@media (prefers-color-scheme: light){ .note{background:#fff;} }

.kbd{
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  padding: 2px 6px;
  border-radius: 8px;
  border:1px solid var(--line);
  background: rgba(0,0,0,.12);
  color: var(--text);
  font-size: 12px;
}
@media (prefers-color-scheme: light){ .kbd{background: rgba(16,22,42,.06);} }

.footer{
  padding: 28px 0 40px;
  border-top: 1px solid var(--line);
  margin-top: 22px;
  color: var(--muted);
  font-size: 12.5px;
}
.footer a{color: var(--text); text-decoration:none; border-bottom:1px dashed var(--line)}
.footer a:hover{border-bottom-color: rgba(125,211,252,.55)}

/* ===== HERO LAYOUT ===== */
.hero{ padding: 54px 0 18px; }
.heroGrid{
  display:grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 18px;
  align-items: stretch;
}
@media (max-width: 980px){
  .heroGrid{ grid-template-columns: 1fr; }
  .brand{ min-width:auto; }
}
.heroMain{ padding: 26px 26px 22px; position:relative; }
.heroSide{ padding: 18px; display:flex; flex-direction:column; gap:12px; }

/* ===== MINI CARDS (SIDEBAR) ===== */
.mini{
  border:1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(0,0,0,.10);
  padding: 14px 14px 12px;
}
@media (prefers-color-scheme: light){ .mini{ background:#fff; } }

.row{ display:flex; flex-wrap:wrap; gap:8px; margin-top: 10px; }

.tag{
  display:inline-flex; align-items:center; gap:8px;
  padding:7px 10px;
  border-radius:999px;
  font-size:12px;
  border:1px solid var(--line);
  background: rgba(255,255,255,.03);
  text-decoration:none;
  color: var(--text);
}
.tag:hover{ border-color: rgba(192,132,252,.40); background: rgba(192,132,252,.10); }
.tag .i{
  width:8px; height:8px; border-radius:99px;
  background: var(--accent2);
  box-shadow: 0 0 0 4px rgba(192,132,252,.12);
}

/* ===== SPLIT BLOCKS ===== */
.split{
  display:flex; align-items:center; justify-content:space-between; gap:12px;
  flex-wrap:wrap;
  padding: 12px 14px;
  border-radius: var(--radius2);
  border:1px solid var(--line);
  background: rgba(255,255,255,.03);
}
@media (prefers-color-scheme: light){ .split{ background:#fff; } }
.split .left b{ display:block; font-size:14px; }
.split .left small{ display:block; color: var(--muted); margin-top:2px; }
.split .right{ display:flex; gap:10px; flex-wrap:wrap; }

/* ===== FOOTER GRID + DISCLAIMER BOX ===== */
.cols{
  display:grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap:14px;
  margin-top: 14px;
}
@media (max-width: 980px){ .cols{ grid-template-columns: 1fr; } }

.fine{
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: var(--radius);
  border:1px solid var(--line);
  background: rgba(255,255,255,.02);
}
@media (prefers-color-scheme: light){ .fine{ background:#fff; } }

/* ===== CONTENT WRAPPER (for subpages) ===== */
.content{ padding: 18px 0 8px; }

/* ===== “CHECKLIST” UI (used in AI Ethics + Legal pages) ===== */
.check{
  display:grid;
  gap:8px;
  margin-top: 10px;
}
.tick{
  width:18px; height:18px;
  border-radius: 7px;
  background: rgba(52,211,153,.22);
  border: 1px solid rgba(52,211,153,.35);
  display:inline-block;
  flex: 0 0 18px;
  position: relative;
  margin-top: 1px;
}
.tick:after{
  content:"";
  position:absolute;
  left:5px; top:3px;
  width:6px; height:9px;
  border-right:2px solid rgba(233,238,251,.95);
  border-bottom:2px solid rgba(233,238,251,.95);
  transform: rotate(40deg);
}
.check > div{
  display:flex;
  gap:10px;
  align-items:flex-start;
  padding: 10px 10px;
  border-radius: 14px;
  border:1px solid var(--line);
  background: rgba(255,255,255,.02);
}
@media (prefers-color-scheme: light){
  .tick:after{
    border-right-color: rgba(16,22,42,.9);
    border-bottom-color: rgba(16,22,42,.9);
  }
}

.callout{
  margin-top: 12px;
  padding: 12px 14px;
  border-radius: var(--radius);
  border:1px solid rgba(125,211,252,.35);
  background: rgba(125,211,252,.10);
  color: var(--text);
}
.warnBox{
  margin-top: 12px;
  padding: 12px 14px;
  border-radius: var(--radius);
  border:1px solid rgba(251,191,36,.40);
  background: rgba(251,191,36,.12);
  color: var(--text);
}

/* ===== ASIDE LIST (subpages) ===== */
.asideList{ margin:0; padding:0; list-style:none; display:grid; gap:8px; }
.asideList a{
  display:flex; align-items:flex-start; gap:10px;
  text-decoration:none;
  padding:10px 10px;
  border-radius:14px;
  border:1px solid var(--line);
  background: rgba(255,255,255,.02);
  transition: transform .14s ease, border-color .14s ease, background .14s ease;
}
.asideList a:hover{
  transform: translateY(-1px);
  border-color: rgba(125,211,252,.34);
  background: rgba(125,211,252,.08);
}

a:focus-visible{ outline: 2px solid rgba(125,211,252,.55); outline-offset: 3px; border-radius: 10px; }