:root {
  --accent: #0D766B;
  --accent-dark: #084A44;
  --text: #1a1a1a;
  --text-secondary: #55605e;
  --bg: #ffffff;
  --card: #f4f7f6;
  --border: #e2e8e7;
}

@media (prefers-color-scheme: dark) {
  :root {
    --accent: #2DD4BF;
    --text: #f2f5f4;
    --text-secondary: #a8b5b3;
    --bg: #0b1413;
    --card: #131f1e;
    --border: #223432;
  }
}

* { box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 32px 20px 80px;
}

header.site {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 20px;
  max-width: 760px;
  margin: 0 auto;
}

header.site .mark {
  width: 36px;
  height: 36px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  flex-shrink: 0;
}

header.site .name {
  font-weight: 700;
  font-size: 17px;
}

nav.site {
  display: flex;
  gap: 18px;
  padding: 0 20px 20px;
  max-width: 760px;
  margin: 0 auto;
  font-size: 14px;
}

nav.site a { color: var(--text-secondary); text-decoration: none; }
nav.site a:hover { color: var(--accent); }

h1 { font-size: 28px; margin-bottom: 4px; }
h2 { font-size: 20px; margin-top: 36px; }
p, li { color: var(--text); }
.muted { color: var(--text-secondary); font-size: 14px; }

.hero {
  text-align: center;
  padding: 40px 0 20px;
}

.hero .mark-lg {
  width: 88px;
  height: 88px;
  border-radius: 22px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  margin: 0 auto 20px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px 20px;
  margin: 14px 0;
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 24px 0;
}
@media (max-width: 560px) { .grid { grid-template-columns: 1fr; } }

.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff !important;
  padding: 12px 22px;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 600;
}

footer.site {
  max-width: 760px;
  margin: 40px auto 0;
  padding: 20px;
  border-top: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 12px;
}

table { border-collapse: collapse; width: 100%; margin: 12px 0; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); font-size: 14px; }