:root {
  --bg: #0b1020;
  --card: #141b2f;
  --ink: #e8eefc;
  --muted: #9aa8c7;
  --accent: #5b8cff;
  --accent2: #3dd6c6;
  --warn: #f5c542;
  --bad: #ff6b7a;
  --good: #3dd68c;
  --line: #24304d;
  --radius: 16px;
  --font: "Inter", "Segoe UI", system-ui, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  background: radial-gradient(1200px 600px at 10% -10%, #1a2750 0%, var(--bg) 55%);
  color: var(--ink);
  min-height: 100vh;
}
body.rtl { direction: rtl; }
.app { max-width: 760px; margin: 0 auto; padding: 16px 16px 48px; }
.top {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; margin-bottom: 16px;
}
.brand { display: flex; gap: 10px; align-items: center; color: inherit; text-decoration: none; }
.brand b { display: block; font-size: 1rem; }
.brand small { color: var(--muted); font-size: .75rem; }
.top-right { display: flex; gap: 10px; align-items: center; }
.lang { display: inline-flex; background: var(--card); border: 1px solid var(--line); border-radius: 999px; padding: 2px; }
.lang-btn {
  border: 0; background: transparent; color: var(--muted);
  padding: 6px 10px; border-radius: 999px; cursor: pointer; font-weight: 600;
}
.lang-btn.active { background: var(--accent); color: #fff; }
.score {
  background: var(--card); border: 1px solid var(--line); border-radius: 999px;
  padding: 6px 12px; font-size: .85rem; color: var(--muted);
}
.score strong { color: var(--accent2); margin-inline-start: 6px; }
.card {
  background: color-mix(in srgb, var(--card) 92%, black);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 14px;
  box-shadow: 0 10px 40px rgba(0,0,0,.25);
}
.hidden { display: none !important; }
h1 { margin: 0 0 8px; font-size: 1.55rem; }
h2 { margin: 0 0 10px; font-size: 1.15rem; }
.bullets { color: var(--muted); padding-inline-start: 1.2rem; }
.bullets li { margin: 6px 0; }
.signup { display: grid; gap: 12px; margin-top: 14px; }
.signup label { display: grid; gap: 6px; font-size: .9rem; color: var(--muted); }
.signup input[type="text"], .signup input[type="email"], .signup input:not([type]) {
  width: 100%; padding: 10px 12px; border-radius: 10px; border: 1px solid var(--line);
  background: #0d1426; color: var(--ink); font: inherit;
}
.privacy { font-size: .8rem; color: var(--muted); line-height: 1.45; }
.consent { display: flex !important; gap: 10px; align-items: flex-start; grid-template-columns: none; }
.consent input { margin-top: 3px; }
.primary, .ghost {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border-radius: 12px; padding: 12px 16px; font: inherit; font-weight: 700;
  cursor: pointer; text-decoration: none; border: 1px solid transparent;
}
.primary { background: linear-gradient(135deg, var(--accent), #7a5cff); color: #fff; border: 0; }
.primary:disabled { opacity: .45; cursor: not-allowed; }
.ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.muted { color: var(--muted); font-size: .9rem; }
.muted a, .foot a { color: var(--accent2); }
.meta-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 10px; }
.chip {
  font-size: .72rem; font-weight: 700; letter-spacing: .03em; text-transform: uppercase;
  padding: 4px 8px; border-radius: 999px; background: #1c2744; color: var(--muted);
  border: 1px solid var(--line);
}
.chip.sample { background: #3a2e12; color: var(--warn); border-color: #6a5420; }
.rubric { color: var(--accent2); }
.prompt-box { background: #0d1426; border: 1px solid var(--line); border-radius: 12px; padding: 14px; margin-bottom: 14px; }
.prompt { margin: 0 0 10px; white-space: pre-wrap; }
.answer { margin: 0; padding: 10px 12px; border-inline-start: 3px solid var(--accent); color: var(--ink); background: #101a33; border-radius: 0 8px 8px 0; }
body.rtl .answer { border-radius: 8px 0 0 8px; }
.choices { display: grid; gap: 8px; }
.choices button {
  text-align: start; padding: 12px 14px; border-radius: 12px; border: 1px solid var(--line);
  background: #121a30; color: var(--ink); font: inherit; font-weight: 600; cursor: pointer;
}
.choices button:hover { border-color: var(--accent); }
.choices button.picked { outline: 2px solid var(--accent); }
.feedback { min-height: 1.4em; font-weight: 600; }
.feedback.good { color: var(--good); }
.feedback.bad { color: var(--bad); }
.feedback.info { color: var(--accent2); }
.play-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.stats-grid div {
  background: #0d1426; border: 1px solid var(--line); border-radius: 12px; padding: 10px;
  display: grid; gap: 4px;
}
.stats-grid span { color: var(--muted); font-size: .75rem; }
.stats-grid strong { font-size: 1.2rem; }
.board-list { padding-inline-start: 1.2rem; }
.board-list li { margin: 6px 0; }
.rev-links { display: flex; flex-wrap: wrap; gap: 8px; }
#whopLink[aria-disabled="true"] { opacity: .5; pointer-events: none; }
.foot { display: flex; justify-content: space-between; color: var(--muted); font-size: .8rem; margin-top: 8px; }
@media (max-width: 560px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .top { flex-wrap: wrap; }
}