:root {
  --canvas: #0b1410;
  --panel: #12201a;
  --border: #1f3329;
  --ink: #e9f3ee;
  --muted: #9bb3a7;
  --accent: #3ddc97;
  --accent-ink: #062016;
}
@media (prefers-color-scheme: light) {
  :root {
    --canvas: #f6f4ee;
    --panel: #ffffff;
    --border: #e2ddd0;
    --ink: #1d2420;
    --muted: #5d6a63;
    --accent: #1f9e6a;
    --accent-ink: #ffffff;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: radial-gradient(ellipse at 50% -10%, color-mix(in srgb, var(--accent) 14%, var(--canvas)) 0%, var(--canvas) 55%) fixed;
  color: var(--ink);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
a { color: var(--accent); }
.wrap { max-width: 720px; margin: 0 auto; padding: 32px 22px 56px; }
nav { display: flex; align-items: center; justify-content: space-between; margin-bottom: 36px; }
nav .brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 700; }
nav .brand img { width: 30px; height: 30px; border-radius: 7px; }
nav .links a { color: var(--muted); text-decoration: none; margin-left: 18px; font-size: 15px; }
nav .links a:hover { color: var(--ink); }

.hero { text-align: center; padding: 28px 0 8px; }
.hero img { width: 112px; height: 112px; border-radius: 25px; box-shadow: 0 12px 40px rgba(0,0,0,.35); }
.hero h1 { font-size: 44px; line-height: 1.1; margin: 22px 0 8px; letter-spacing: -0.02em; }
.hero p.tag { font-size: 20px; color: var(--muted); margin: 0 0 26px; }
.btn {
  display: inline-block; background: var(--accent); color: var(--accent-ink);
  padding: 13px 24px; border-radius: 12px; font-weight: 700; text-decoration: none;
}
.btn.ghost { background: transparent; color: var(--ink); border: 1px solid var(--border); margin-left: 8px; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; margin: 44px 0; }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: 16px; padding: 18px 18px 16px; }
.card h3 { margin: 0 0 6px; font-size: 17px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.5; }

.note { background: var(--panel); border: 1px solid var(--border); border-radius: 14px; padding: 14px 16px; color: var(--muted); font-size: 14px; }

article h1 { font-size: 34px; line-height: 1.15; margin: 0 0 4px; letter-spacing: -0.01em; }
article .updated { color: var(--muted); margin: 0 0 28px; font-size: 15px; }
article h2 { font-size: 21px; margin: 34px 0 8px; }
article p, article li { color: color-mix(in srgb, var(--ink) 88%, var(--canvas)); }
article ul { padding-left: 22px; }
article li { margin: 4px 0; }

footer { margin-top: 56px; padding-top: 20px; border-top: 1px solid var(--border); color: var(--muted); font-size: 14px; display: flex; flex-wrap: wrap; gap: 6px 18px; }
footer a { color: var(--muted); text-decoration: none; }
footer a:hover { color: var(--ink); }

@media (max-width: 520px) {
  .hero h1 { font-size: 36px; }
  .btn.ghost { margin: 10px 0 0; }
  nav .links a { margin-left: 12px; }
}