/* GezegenselCore developer site — minimal, trustworthy, mobile-friendly */
:root {
  --bg: #fafafa;
  --card: #ffffff;
  --text: #1a1a1a;
  --muted: #5f6368;
  --accent: #0F0F12;
  --border: #e8eaed;
  --max-w: 720px;
  --line-height: 1.7;
  --space: 1.25rem;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: var(--line-height);
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: var(--space) 1rem 3rem;
}

nav {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 1rem;
  position: sticky;
  top: 0;
  z-index: 10;
}
nav .container {
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  align-items: center;
}
nav a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}
nav a:hover { text-decoration: underline; }
nav .brand {
  margin-right: auto;
  font-weight: 700;
  color: var(--accent);
}

main { padding-top: 1.5rem; }
h1 { font-size: 1.75rem; margin-top: 0; margin-bottom: 0.5rem; color: var(--accent); }
.subtitle { font-size: 1rem; color: var(--muted); margin-bottom: 2rem; }
h2 { font-size: 1.25rem; margin-top: 2rem; margin-bottom: 0.5rem; color: var(--accent); }
h3 { font-size: 1.1rem; margin-top: 1.25rem; margin-bottom: 0.35rem; }

p { margin: 0 0 1em; }
ul, ol { margin: 0 0 1em; padding-left: 1.5rem; }
li { margin-bottom: 0.35em; }

.app-item { margin-bottom: 0.75em; }
.app-item strong { display: block; }
.app-item span { color: var(--muted); font-size: 0.95em; }

.lang-block {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}
.lang-block:last-of-type {
  border-bottom: none;
}

footer {
  margin-top: 2.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.9rem;
  color: var(--muted);
}

a[href] { color: #1a73e8; }
a[href]:hover { text-decoration: underline; }

@media (max-width: 640px) {
  body { font-size: 15px; }
  .container { padding-left: 1rem; padding-right: 1rem; }
}