:root {
  --bg: #0f1220;
  --bg-soft: #171b2e;
  --card: #1c2138;
  --card-2: #232a47;
  --text: #e8ebf5;
  --muted: #9aa3c0;
  --accent: #7c6cff;
  --accent-2: #4dd0e1;
  --accent-grad: linear-gradient(135deg, #7c6cff 0%, #4dd0e1 100%);
  --border: #2c3358;
  --ok: #35d07f;
  --radius: 14px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f5f6fb;
    --bg-soft: #ffffff;
    --card: #ffffff;
    --card-2: #f0f2fa;
    --text: #1a1d2b;
    --muted: #5c6484;
    --border: #e2e5f0;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", sans-serif;
  background: radial-gradient(1200px 600px at 50% -200px, rgba(124,108,255,.25), transparent), var(--bg);
  color: var(--text);
  line-height: 1.7;
}
.wrap { width: 100%; max-width: 860px; margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header { border-bottom: 1px solid var(--border); background: rgba(0,0,0,.05); }
.site-header .wrap { display: flex; align-items: center; gap: 12px; height: 60px; }
.logo { font-weight: 700; font-size: 18px; }
.tag {
  font-size: 12px; color: var(--accent-2); border: 1px solid var(--border);
  padding: 3px 10px; border-radius: 999px; margin-left: auto;
}

/* Hero */
h1 { font-size: clamp(24px, 5vw, 34px); line-height: 1.35; margin: 36px 0 14px; }
.lead { color: var(--muted); font-size: 16px; margin: 0 0 34px; }

/* Tool grid */
.tool-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px; margin-bottom: 40px;
}
.tool-card {
  display: block; background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 22px; text-decoration: none; color: var(--text);
  transition: border-color .15s, transform .1s;
}
a.tool-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.tool-card.is-soon { opacity: .55; }
.tool-icon { font-size: 30px; margin-bottom: 8px; }
.tool-card h2 { font-size: 17px; margin: 0 0 8px; }
.tool-card p { font-size: 14px; color: var(--muted); margin: 0 0 14px; }
.tool-link { font-size: 14px; font-weight: 700; color: var(--accent-2); }
.tool-link.is-soon { color: var(--muted); font-weight: 600; }

/* Article */
.article { border-top: 1px solid var(--border); padding-top: 20px; }
.article h2 { font-size: 22px; margin: 34px 0 12px; }
.article p { color: var(--text); }

/* Footer */
.site-footer { border-top: 1px solid var(--border); margin-top: 50px; padding: 24px 0; }
.site-footer p { margin: 4px 0; color: var(--muted); font-size: 13px; }