:root {
  --bg: #f5f5f7;
  --card: #ffffff;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --accent: #34c759;
  --accent-dark: #248a3d;
  --border: #e5e5ea;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 17px;
}

header.site {
  background: linear-gradient(135deg, #34c759, #248a3d);
  color: #fff;
  padding: 56px 24px 48px;
  text-align: center;
}

header.site .app-name {
  font-size: 30px;
  font-weight: 700;
  margin: 0;
  letter-spacing: -0.02em;
}

header.site .tagline {
  margin: 10px 0 0;
  font-size: 17px;
  opacity: 0.92;
}

nav.tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 26px;
}

nav.tabs a {
  color: #fff;
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: 980px;
  background: rgba(255,255,255,0.16);
  transition: background 0.2s;
}

nav.tabs a:hover { background: rgba(255,255,255,0.28); }
nav.tabs a.active { background: #fff; color: var(--accent-dark); }

main {
  max-width: 720px;
  margin: -28px auto 0;
  padding: 0 20px 64px;
}

.card {
  background: var(--card);
  border-radius: 18px;
  padding: 36px 32px;
  box-shadow: 0 6px 24px rgba(0,0,0,0.06);
}

h1 {
  font-size: 26px;
  font-weight: 700;
  margin: 0 0 6px;
  letter-spacing: -0.02em;
}

.updated {
  color: var(--muted);
  font-size: 14px;
  margin: 0 0 24px;
}

h2 {
  font-size: 19px;
  font-weight: 600;
  margin: 32px 0 10px;
  letter-spacing: -0.01em;
}

p { margin: 0 0 14px; }

a { color: var(--accent-dark); }

.contact-box {
  margin-top: 28px;
  padding: 20px 22px;
  background: #f0faf2;
  border: 1px solid #cdeed6;
  border-radius: 14px;
}

.contact-box .label { font-size: 14px; color: var(--muted); margin: 0 0 4px; }
.contact-box a { font-size: 18px; font-weight: 600; text-decoration: none; }

footer.site {
  text-align: center;
  color: var(--muted);
  font-size: 13px;
  padding: 32px 20px 48px;
}

footer.site a { color: var(--muted); }