*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --max-w: 720px;
  --radius: 8px;
  --gap: 1.5rem;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --bg: #ffffff;
  --bg2: #f8f9fa;
  --border: #e2e8f0;
  --text: #1a202c;
  --text2: #4a5568;
  --accent: #2563eb;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f172a;
    --bg2: #1e293b;
    --border: #334155;
    --text: #f1f5f9;
    --text2: #94a3b8;
    --accent: #60a5fa;
  }
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
}

.header {
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  padding: 1rem var(--gap);
}

.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.header-left { display: flex; align-items: center; gap: 0.75rem; }
.app-icon { width: 40px; height: 40px; border-radius: 10px; }
.app-name { font-weight: 700; font-size: 1.1rem; }
.doc-type { font-size: 0.85rem; color: var(--text2); margin-top: 1px; }

.lang-select {
  padding: 0.35rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
  font-size: 0.85rem;
  cursor: pointer;
}

main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 2rem var(--gap) 4rem;
}

.updated {
  font-size: 0.85rem;
  color: var(--text2);
  margin-bottom: 2rem;
  padding: 0.6rem 1rem;
  background: var(--bg2);
  border-radius: var(--radius);
  border-left: 3px solid var(--accent);
}

h2 { font-size: 1.2rem; margin-top: 2rem; margin-bottom: 0.6rem; color: var(--text); }
h3 { font-size: 1rem; font-weight: 600; margin-top: 1.2rem; margin-bottom: 0.4rem; }
p { color: var(--text2); margin-bottom: 0.8rem; }
ul { color: var(--text2); padding-left: 1.4rem; margin-bottom: 0.8rem; }
li { margin-bottom: 0.3rem; }
a { color: var(--accent); }

.section {
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
  margin-top: 1.5rem;
}
.section:first-of-type { border-top: none; padding-top: 0; margin-top: 0; }

.highlight-box {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  margin: 1rem 0;
}

footer {
  text-align: center;
  padding: 2rem var(--gap);
  color: var(--text2);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
}

.nav-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 0.5rem;
}

.lang-content { display: none; }
.lang-content.active { display: block; }

/* Index page */
.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.app-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem;
  text-decoration: none;
  display: block;
  transition: background 0.15s;
}
.app-card:hover { background: var(--bg2); }
.app-card-title { font-weight: 600; color: var(--text); margin-bottom: 0.3rem; }
.app-card-links { display: flex; gap: 0.75rem; margin-top: 0.6rem; }
.app-card-links a { font-size: 0.85rem; color: var(--accent); }

@media (max-width: 480px) {
  main { padding: 1.5rem 1rem 3rem; }
  .header-inner { flex-direction: column; align-items: flex-start; }
}