/* /css/blog.css  — blog記事共通スタイル */

:root{
  --bg:#0b0e14;
  --panel:#0f172a;
  --panel2:#111827;
  --text:#e5e7eb;
  --muted:#a4aab6;
  --line:rgba(255,255,255,.08);
  --accent:#60a5fa;
  --accent2:#34d399;
  --warn:#fbbf24;
  --shadow:0 10px 30px rgba(0,0,0,.35);
  --radius:16px;
  --sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

*{box-sizing:border-box}
html,body{height:100%}

body{
  margin:0;
  font-family:var(--sans);
  font-size:16px;
  line-height:1.8;
  background: radial-gradient(1200px 600px at 10% -10%, rgba(96,165,250,.25), transparent 55%),
              radial-gradient(1200px 600px at 90% 10%, rgba(52,211,153,.18), transparent 55%),
              var(--bg);
  color:var(--text);
}

a{color:inherit}
.wrap{max-width:980px;margin:0 auto;padding:18px 14px 48px;}

/* header */
.top{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-bottom:28px;padding-bottom:18px;border-bottom:2px solid rgba(96,165,250,.15);
  flex-wrap:wrap;
}
.brand{
  font-weight:900;letter-spacing:.4px;font-size:18px;
  display:inline-flex;align-items:center;gap:10px;text-decoration:none;
}
.brand .dot{
  width:10px;height:10px;border-radius:999px;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  box-shadow:0 0 0 4px rgba(96,165,250,.12);
}
.nav{display:flex;gap:10px;flex-wrap:wrap;align-items:center;justify-content:flex-end;}
.nav a{
  padding:8px 10px;border:1px solid rgba(255,255,255,.10);
  border-radius:999px;background:rgba(255,255,255,.05);
  font-size:13px;text-decoration:none;
}
.nav a:hover{border-color:rgba(96,165,250,.35);background:rgba(96,165,250,.10);}

/* article */
.article{
  border:2px solid rgba(96,165,250,.25);
  border-radius:calc(var(--radius) + 4px);
  background:linear-gradient(180deg, rgba(255,255,255,.08), rgba(255,255,255,.03));
  box-shadow:var(--shadow), 0 0 0 1px rgba(96,165,250,.1);
  padding:28px 24px;
  position:relative;
  overflow:hidden;
}
.article::before{
  content:'';
  position:absolute;top:0;left:0;width:4px;height:100%;
  background:linear-gradient(180deg, var(--accent), var(--accent2));
  border-radius:var(--radius) 0 0 var(--radius);
  z-index:2;
}
.article::after{
  content:'';
  position:absolute;top:0;right:0;width:300px;height:300px;
  background:radial-gradient(circle, rgba(96,165,250,.12), transparent 70%);
  pointer-events:none;
  z-index:0;
}
.article > *{position:relative;z-index:1;}

.kicker{font-size:12px;color:rgba(255,255,255,.75);font-weight:900;letter-spacing:.2px;}
h1{margin:6px 0 0;font-size:28px;letter-spacing:.2px;line-height:1.35;color:#fff;}
.meta{margin-top:8px;color:var(--muted);font-size:13px;line-height:1.6;}
.lead{margin:12px 0 0;color:rgba(255,255,255,.85);font-size:15px;line-height:1.95;}

.callout{
  margin:14px 0 0;
  border-left:4px solid rgba(96,165,250,.65);
  background:rgba(96,165,250,.10);
  padding:12px 12px;
  border-radius:14px;
  font-size:14px;
  line-height:1.9;
}
.callout.warn{
  border-left-color:rgba(251,191,36,.75);
  background:rgba(251,191,36,.10);
}

.toc{
  margin-top:20px;
  border:1px solid rgba(255,255,255,.12);
  border-radius:var(--radius);
  background:rgba(15,23,42,.75);
  padding:16px 18px;
  box-shadow:0 4px 16px rgba(0,0,0,.25);
}
.toc h2{
  margin:0 0 10px;font-size:16px;font-weight:900;color:#fff;
  display:inline-flex;align-items:center;gap:8px;
  padding:0;border-bottom:none;
}
.toc h2::before{
  content:'';
  width:5px;
  height:5px;
  border-radius:999px;
  display:inline-block;
  flex:0 0 auto;

  /* TOCタイトルはインライン表示（全体h2の::before絶対配置の影響を受けないように） */
  position:static;
  left:auto;
  top:auto;

  background:linear-gradient(135deg,var(--accent),var(--accent2));
  box-shadow:0 0 6px rgba(96,165,250,.5);
}
.toc ol{margin:0;padding-left:20px;color:rgba(255,255,255,.9);font-size:14px;line-height:1.9;}
.toc a{color:rgba(255,255,255,.9);text-decoration:none;border-bottom:1px dashed rgba(255,255,255,.25);}
.toc a:hover{border-bottom-color:rgba(96,165,250,.55);}

h2{
  margin:32px 0 12px;font-size:20px;font-weight:900;letter-spacing:.1px;color:#fff;
  padding-bottom:8px;border-bottom:2px solid rgba(96,165,250,.2);
  position:relative;padding-left:22px;
}
h2::before{
  content:'';
  position:absolute;left:0;top:4px;width:6px;height:6px;border-radius:999px;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  box-shadow:0 0 8px rgba(96,165,250,.5);
}
h3{margin:20px 0 8px;font-size:17px;font-weight:900;letter-spacing:.1px;color:rgba(255,255,255,.95);}
p{margin:8px 0 0;color:rgba(255,255,255,.88);}
ul,ol{margin:8px 0 0;padding-left:20px;color:rgba(255,255,255,.88);}
li{margin:4px 0}
.muted{color:var(--muted);}
.sep{height:2px;background:linear-gradient(90deg, transparent, rgba(96,165,250,.3), transparent);margin:24px 0;}

.btnRow{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 12px;border-radius:12px;border:1px solid rgba(255,255,255,.12);
  background:rgba(255,255,255,.06);font-weight:900;font-size:14px;text-decoration:none;
}
.btn.primary{
  background:linear-gradient(135deg, rgba(96,165,250,.95), rgba(52,211,153,.75));
  border-color:rgba(96,165,250,.20);
  color:#0b0e14;
}
.btn.ghost:hover{border-color:rgba(96,165,250,.35);background:rgba(96,165,250,.10);}
.btn.primary:hover{filter:saturate(1.05) brightness(1.03)}

table{
  width:100%;border-collapse:collapse;border-radius:14px;overflow:hidden;
  border:1px solid rgba(255,255,255,.12);margin-top:14px;
  box-shadow:0 4px 16px rgba(0,0,0,.2);
}
th,td{padding:12px 14px;border-bottom:1px solid rgba(255,255,255,.08);font-size:14px;vertical-align:top;}
th{text-align:left;color:rgba(255,255,255,.85);font-weight:900;background:rgba(2,6,23,.55);width:32%;}
tr:last-child td{border-bottom:none}

.tagRow{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px;}
.tag{
  font-size:12px;line-height:1;padding:8px 10px;border-radius:999px;
  border:1px solid rgba(255,255,255,.12);
  background:rgba(255,255,255,.05);
  color:rgba(255,255,255,.88);
}
.tag.ok{border-color:rgba(52,211,153,.35);background:rgba(52,211,153,.10)}
.tag.warn{border-color:rgba(251,191,36,.35);background:rgba(251,191,36,.10)}

.miniNote{margin-top:10px;font-size:13px;color:var(--muted);line-height:1.8;}
.footerNote{margin-top:16px;font-size:13px;color:var(--muted);line-height:1.8;}

/* images */
.heroImg{
  width:100%;height:240px;object-fit:cover;border-radius:var(--radius);
  margin:14px 0 0;box-shadow:var(--shadow);opacity:0.92;transition:all 0.3s ease;
}
.heroImg:hover{opacity:1;transform:scale(1.01);box-shadow:0 12px 40px rgba(0,0,0,.45);}

.sectionImg{
  width:100%;height:180px;object-fit:cover;border-radius:12px;
  margin:12px 0 8px;box-shadow:0 6px 20px rgba(0,0,0,.3);
  opacity:0.88;border:1px solid rgba(255,255,255,.08);transition:all 0.3s ease;
}
.sectionImg:hover{
  opacity:1;transform:translateY(-2px);
  box-shadow:0 10px 30px rgba(96,165,250,.25);
  border-color:rgba(96,165,250,.25);
}

/* footer */
.foot{
  margin-top:36px;padding-top:20px;border-top:2px solid rgba(96,165,250,.15);
  display:flex;align-items:flex-start;justify-content:space-between;gap:10px;flex-wrap:wrap;
  color:var(--muted);font-size:13px;
}
.copyNote{margin-top:6px;font-size:12px;line-height:1.7;color:rgba(164,170,182,.95);}
.footLinks{display:flex;gap:10px;flex-wrap:wrap;}
.footLinks a{
  padding:6px 8px;border-radius:999px;border:1px solid rgba(255,255,255,.10);
  background:rgba(255,255,255,.04);text-decoration:none;
}
.footLinks a:hover{border-color:rgba(96,165,250,.35);background:rgba(96,165,250,.10);}

/* Responsive */
@media (max-width: 900px){
  .article{padding:22px 18px;}
  h1{font-size:24px;}
  h2{font-size:18px;}
  h3{font-size:16px;}
}
@media (max-width: 640px){
  .wrap{padding:12px 12px 36px;}
  .top{flex-direction:column;align-items:flex-start;gap:16px;margin-bottom:20px;padding-bottom:16px;}
  .brand{font-size:16px;}
  .nav{width:100%;justify-content:flex-start;}
  .nav a{font-size:12px;padding:6px 10px;}
  .article{padding:18px 14px;}
  h1{font-size:22px;line-height:1.4;}
  h2{font-size:17px;margin:24px 0 10px;padding-left:20px;}
  h3{font-size:15px;margin:16px 0 6px;}
  .lead{font-size:14px;}
  .btn{width:100%;justify-content:center;font-size:13px;padding:10px 12px;}
  .btnRow{flex-direction:column;}
  .toc{padding:14px 16px;}
  .toc h2{font-size:15px;}
  .toc ol{font-size:13px;}
  th,td{padding:10px 12px;}
  .heroImg{height:180px;}
  .sectionImg{height:140px;}
  .foot{flex-direction:column;align-items:flex-start;margin-top:28px;padding-top:16px;}
  .footLinks{width:100%;}
  .footLinks a{font-size:12px;}
}
@media (max-width: 400px){
  .wrap{padding:10px 10px 28px;}
  .article{padding:14px 12px;}
  h1{font-size:20px;}
  h2{font-size:16px;padding-left:18px;}
  h3{font-size:14px;}
  .toc{padding:12px 14px;}
  .heroImg{height:160px;}
  .sectionImg{height:120px;}
}