:root {
  --bg: #0d1410;
  --bg-2: #142019;
  --card: #18261e;
  --card-hi: #1f3127;
  --line: #2a3f33;
  --text: #e6efe8;
  --muted: #9db3a5;
  --accent: #7fd39b;
  --accent-ink: #0d1410;
  --gold: #e8c46a;
  --good: #6fd08c;
  --bad: #e7806f;
  --radius: 14px;
  --shadow: 0 1px 0 rgba(255, 255, 255, 0.03) inset, 0 8px 24px rgba(0, 0, 0, 0.25);
  color-scheme: dark;
}
:root[data-theme='light'] {
  --bg: #f3f6f1;
  --bg-2: #e8eee5;
  --card: #ffffff;
  --card-hi: #f5f9f3;
  --line: #d4dfd3;
  --text: #17231b;
  --muted: #56695c;
  --accent: #2f8a52;
  --accent-ink: #ffffff;
  --gold: #a87b12;
  --good: #23864a;
  --bad: #c0412d;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.06), 0 6px 18px rgba(30, 60, 40, 0.08);
  color-scheme: light;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: radial-gradient(1200px 600px at 50% -200px, var(--bg-2), var(--bg)) fixed, var(--bg);
  color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  min-height: 100vh;
}
a { color: inherit; }
.wrap { max-width: 860px; margin: 0 auto; padding: 24px 16px 64px; }
h1, h2, h3 { line-height: 1.2; margin: 0; }
h1 { font-size: clamp(28px, 6vw, 42px); letter-spacing: -0.02em; }
h2 { font-size: 20px; margin: 32px 0 12px; }
.muted { color: var(--muted); }
button { font: inherit; color: inherit; cursor: pointer; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 18px; border-radius: 999px; border: 1px solid var(--line);
  background: var(--card); text-decoration: none; font-weight: 600;
}
.btn:hover { background: var(--card-hi); }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: transparent; }
.btn.primary:hover { filter: brightness(1.08); }
.btn:focus-visible, .choice:focus-visible, .card:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

/* Hub */
.hero { display: flex; gap: 24px; align-items: center; justify-content: space-between; flex-wrap: wrap; margin-bottom: 8px; }
.hero p { margin: 8px 0 0; max-width: 46ch; }
.qr-box {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 12px; text-align: center; box-shadow: var(--shadow);
}
.qr-box #qr { width: 148px; height: 148px; border-radius: 8px; overflow: hidden; background: #fff; }
.qr-box #qr svg { width: 100%; height: 100%; display: block; }
.qr-box small { display: block; margin-top: 6px; color: var(--muted); font-size: 12px; }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; }
.card {
  display: block; text-decoration: none; background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); transition: transform 0.12s, border-color 0.12s;
}
.card:hover { transform: translateY(-2px); border-color: var(--accent); }
.card h3 { font-size: 18px; margin: 8px 0 6px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; }
.tag {
  display: inline-block; font-size: 12px; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase;
  color: var(--accent); background: color-mix(in srgb, var(--accent) 14%, transparent); padding: 2px 8px; border-radius: 999px;
}
.empty { color: var(--muted); }
footer { margin-top: 48px; color: var(--muted); font-size: 13px; }
.theme-toggle { display: block; margin: 0 auto 32px; padding: 8px 14px; font-size: 13px; }