:root{
  --bg:#0b1020;
  --panel:#111a33;
  --text:#e7ecff;
  --muted:#aab4e6;
  --line:#24305c;
  --accent:#6bff9f;
  --accent2:#6bb7ff;
}

*{box-sizing:border-box}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Meiryo", sans-serif;
  background: radial-gradient(1200px 700px at 20% 0%, #131b3a, var(--bg));
  color:var(--text);
}

a{color:inherit; text-decoration:none}
.container{max-width:980px; margin:0 auto; padding:0 16px}

.site-header{position:sticky; top:0; backdrop-filter: blur(10px); background: rgba(11,16,32,.65); border-bottom:1px solid var(--line); z-index:10}
.site-header .container{display:flex; align-items:center; justify-content:space-between; height:56px}
.brand{font-weight:800; letter-spacing:.2px}
.nav a{margin-left:14px; color:var(--muted)}
.nav a:hover{color:var(--text)}

main{padding:28px 0 40px}
.card{
  background: linear-gradient(180deg, rgba(17,26,51,.95), rgba(17,26,51,.75));
  border:1px solid var(--line);
  border-radius:16px;
  padding:16px;
  box-shadow: 0 14px 40px rgba(0,0,0,.25);
}

.grid{display:grid; gap:14px}
.grid.cols2{grid-template-columns: repeat(2, minmax(0, 1fr))}
@media (max-width: 820px){ .grid.cols2{grid-template-columns:1fr} }

h1{font-size:28px; margin:0 0 12px}
h2{font-size:18px; margin:0 0 10px; color:var(--muted)}
p{line-height:1.7; color:var(--muted)}
label{display:block; font-size:13px; color:var(--muted); margin:10px 0 6px}
textarea, input, select{
  width:100%;
  padding:10px 12px;
  border-radius:12px;
  border:1px solid var(--line);
  background:#0c1330;
  color:var(--text);
  outline:none;
}
textarea{min-height:120px; resize:vertical}
.row{display:flex; gap:10px; flex-wrap:wrap}
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding:10px 14px;
  border-radius:12px;
  border:1px solid var(--line);
  background: rgba(107,255,159,.12);
  color: var(--text);
  cursor:pointer;
  user-select:none;
}
.btn:hover{border-color: rgba(107,255,159,.55)}
.badge{display:inline-block; padding:3px 9px; border-radius:999px; border:1px solid var(--line); color:var(--muted); font-size:12px}
.mono{font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace}
.kpi{font-size:12px; color:var(--muted)}
.site-footer{padding:26px 0 40px}
.site-footer .muted{color:var(--muted); font-size:12px}
hr{border:0; border-top:1px solid var(--line); margin:14px 0}