:root {
  --text: #1d1d1f;
  --muted: #6e6e73;
  --bg: #ffffff;
  --panel: #f3f6f2;
  --line: #dfe6dc;
  --accent: #1e7b34;
  --accent-text: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --text: #f5f5f7;
    --muted: #a1a1a6;
    --bg: #0b0d0b;
    --panel: #161a16;
    --line: #2a312a;
    --accent: #4cc26a;
    --accent-text: #08210f;
  }
}
:root[data-theme="dark"] {
  --text: #f5f5f7; --muted: #a1a1a6; --bg: #0b0d0b; --panel: #161a16;
  --line: #2a312a; --accent: #4cc26a; --accent-text: #08210f;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}
a { color: var(--accent); }
main, header, footer { max-width: 720px; margin: 0 auto; padding: 0 16px; }

header { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding-top: 20px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 600; }
.brand img { width: 32px; height: 32px; border-radius: 8px; }
nav a { margin-left: 16px; text-decoration: none; color: var(--muted); }
nav a:hover { color: var(--text); }

.hero { text-align: center; padding: 48px 0 24px; }
.hero img { width: 128px; height: 128px; border-radius: 28px; box-shadow: 0 8px 24px rgba(0,0,0,.18); }
.hero h1 { font-size: 36px; line-height: 1.15; margin: 20px 0 8px; }
.hero p { color: var(--muted); font-size: 19px; margin: 0 auto 24px; max-width: 520px; }
.button {
  display: inline-block; background: var(--accent); color: var(--accent-text);
  padding: 12px 22px; border-radius: 999px; text-decoration: none; font-weight: 600;
}

.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; margin: 32px 0; }
.feature { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 16px; }
.feature h3 { margin: 0 0 4px; font-size: 17px; }
.feature p { margin: 0; color: var(--muted); font-size: 15px; }

h1.page { font-size: 32px; line-height: 1.2; margin: 32px 0 4px; }
h2 { font-size: 20px; margin: 32px 0 8px; }
.updated { color: var(--muted); margin: 0 0 24px; }
.short { border-left: 4px solid var(--accent); padding: 4px 0 4px 16px; }
.contact { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 16px 20px; }

footer { color: var(--muted); font-size: 14px; padding-top: 32px; padding-bottom: 40px; border-top: 1px solid var(--line); margin-top: 48px; }
footer a { color: var(--muted); margin-right: 16px; }

@media (max-width: 480px) {
  .hero h1 { font-size: 30px; }
  nav a { margin-left: 12px; }
}