:root {
  --ink: #14213d;
  --muted: #5b6475;
  --paper: #fbf8f3;
  --card: #ffffff;
  --line: #e4ddd0;
  --accent: #1f6f5c;
  --accent-ink: #ffffff;
  --warn: #8a5a00;
  --radius: 12px;
  --font: ui-sans-serif, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; font: 16px/1.55 var(--font); color: var(--ink); background: var(--paper); }
a { color: var(--accent); }
.wrap { max-width: 920px; margin: 0 auto; padding: 0 20px; }
header.top { display: flex; justify-content: space-between; align-items: center; padding: 18px 0; }
.brand { font-weight: 700; letter-spacing: -0.01em; text-decoration: none; color: var(--ink); }
.btn { display: inline-block; background: var(--accent); color: var(--accent-ink); padding: 12px 18px;
  border-radius: 999px; text-decoration: none; border: 0; font: inherit; font-weight: 600; cursor: pointer; }
.btn.ghost { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
.btn:disabled { opacity: .5; cursor: default; }
.hero { padding: 56px 0 32px; }
.hero h1 { font-size: clamp(30px, 5vw, 46px); line-height: 1.1; margin: 0 0 16px; letter-spacing: -0.02em; }
.hero p.lede { font-size: 18px; color: var(--muted); max-width: 640px; margin: 0 0 24px; }
.disclaimer { font-size: 13px; color: var(--warn); background: #fff6e0; border: 1px solid #f0dca8;
  border-radius: 8px; padding: 10px 12px; margin: 24px 0; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); margin: 24px 0 40px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.card h3 { margin: 0 0 8px; font-size: 17px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.price { font-size: 32px; font-weight: 700; margin: 4px 0; }
footer { color: var(--muted); font-size: 13px; padding: 32px 0 48px; border-top: 1px solid var(--line); margin-top: 32px; }

/* quiz app */
.quiz { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; margin: 24px 0; }
.meta { display: flex; justify-content: space-between; align-items: center; overflow-wrap: anywhere; flex-wrap: wrap; gap: 12px; font-size: 14px; color: var(--muted); margin-bottom: 12px; }
.pill { background: #eef5f2; color: var(--accent); border-radius: 999px; padding: 2px 10px; font-size: 13px; }
.pill.warn { background: #fff1d6; color: var(--warn); }
.prompt { font-size: 18px; font-weight: 600; margin: 8px 0 16px; }
.choices { display: grid; gap: 10px; }
.choice { color: var(--ink); text-align: left; background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; font: inherit; cursor: pointer; }
.choice:hover:not(:disabled) { border-color: var(--accent); }
.choice:disabled { color: var(--ink); opacity: 1; cursor: default; }
.choice.right { font-weight: 600; border-color: var(--accent); background: #eef5f2; }
.choice.wrong { border-color: #b3261e; background: #fdecea; }
.explain { margin-top: 14px; padding: 12px 14px; background: #f5f2ec; border-radius: 10px; font-size: 15px; }
.row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 16px; align-items: center; }
.upsell { border: 1px dashed var(--accent); border-radius: var(--radius); padding: 16px; margin-top: 16px; }
.stats { display: flex; gap: 20px; flex-wrap: wrap; font-size: 15px; }
.stats strong { font-size: 20px; display: block; }
:focus-visible { outline: 3px solid #9cc9bb; outline-offset: 2px; }
@media (max-width: 560px) { .hero { padding-top: 32px; } .quiz { padding: 16px; } }

.flagbox { margin-top: 14px; }
.flagbox form, #fb-form { display: grid; gap: 8px; margin-top: 8px; }
input[type=text], input[type=email], textarea, select { font: inherit; padding: 10px; border: 1px solid #cfc8bb; border-radius: 8px; width: 100%; box-sizing: border-box; }
#redeem-form { gap: 8px; }
#redeem-form input { flex: 1; min-width: 160px; }

/* multi-page additions */
.nav { display: flex; gap: 16px; font-size: 15px; }
.nav a { text-decoration: none; }
.stack { display: grid; gap: 10px; max-width: 420px; }
.prose h2 { font-size: 18px; margin: 20px 0 6px; }
.prose li { margin: 4px 0; }
.btn.flagbtn { background: #fff1d6; color: var(--warn); border: 1px solid #e3c47a; width: 100%; }
footer a { color: var(--muted); }
#invite-form input { flex: 1; min-width: 160px; }

.steps { padding-left: 22px; line-height: 1.6; }
.steps li { margin-bottom: 8px; }