/* StudyCoor iOS — shared styles (dark-first) */
:root {
  --bg: #0d1117;
  --text: #e6edf3;
  --muted: #9aa7b5;
  --panel: #0f141a;
  --border: #1f2937;
  --link: #58a6ff;
  --link-hover: #79c0ff;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font: 16px -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Arial, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: radial-gradient(1200px 800px at 10% -10%, rgba(88,166,255,0.08), transparent),
              radial-gradient(1000px 600px at 110% 10%, rgba(120,120,255,0.06), transparent),
              var(--bg);
}

.container {
  max-width: 760px;
  margin: 56px auto;
  padding: 28px;
  background: color-mix(in srgb, var(--panel) 92%, transparent);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.35);
}

h1 {
  margin: 0 0 12px;
  font-size: 32px;
  letter-spacing: -0.01em;
}

p { margin: 0 0 12px; color: var(--text); }
small, .muted { color: var(--muted); }

ul { margin: 12px 0 0; padding-left: 20px; }
li { margin: 6px 0; }

a { color: var(--link); text-decoration: none; text-underline-offset: 2px; }
a:hover { color: var(--link-hover); text-decoration: underline; }
a:focus { outline: 2px solid var(--link); outline-offset: 2px; border-radius: 4px; }

main { display: block; }

@media (prefers-color-scheme: light) {
  :root {
    --bg: #ffffff;
    --text: #0b1220;
    --muted: #495566;
    --panel: #ffffff;
    --border: #e5e7eb;
    --link: #0a58ca;
    --link-hover: #0849a8;
  }
  body { background: var(--bg); }
  .container { box-shadow: 0 8px 24px rgba(0,0,0,0.06); }
}