:root {
  --bg: #0b1220;
  --panel: #0f1a2e;
  --card: #111f38;
  --text: #e8eefc;
  --muted: #a9b7da;
  --good: #28d17c;
  --bad: #ff4d4d;
  --warn: #ffcf5a;
  --border: rgba(255,255,255,0.08);
  --shadow: 0 12px 30px rgba(0,0,0,0.35);
  --radius: 16px;
  --font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Apple Color Emoji","Segoe UI Emoji";
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: radial-gradient(1200px 600px at 20% 0%, rgba(87,130,255,0.22), transparent 70%),
              radial-gradient(900px 600px at 80% 10%, rgba(40,209,124,0.12), transparent 70%),
              var(--bg);
  color: var(--text);
  font-family: var(--font);
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding: 16px 18px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(11,18,32,0.75);
  backdrop-filter: blur(10px);
  z-index: 5;
}

.brand {
  display: flex;
  gap: 12px;
  align-items: center;
}

.logo {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(87,130,255,0.35), rgba(40,209,124,0.2));
  border: 1px solid var(--border);
}

.title { font-weight: 800; letter-spacing: 0.2px; }
.subtitle { color: var(--muted); font-size: 13px; margin-top: 2px; }

.status {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-end;
}

.pill {
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.03);
  padding: 8px 10px;
  border-radius: 999px;
  font-size: 12px;
  color: var(--muted);
}

.layout {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 18px;
  padding: 18px;
  max-width: 1200px;
  margin: 0 auto;
}

@media (max-width: 980px) {
  .layout { grid-template-columns: 1fr; }
}

.panel h2 {
  margin: 10px 0 10px;
  font-size: 14px;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: var(--muted);
}

.card {
  background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.02));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
}

.card.small { font-size: 14px; color: var(--muted); }

.row {
  display: flex;
  gap: 10px;
  align-items: baseline;
  margin-bottom: 10px;
}
.label { color: var(--muted); font-size: 13px; }
.value { font-weight: 700; }

.prompt {
  font-size: 18px;
  font-weight: 750;
  margin: 10px 0 14px;
}

.options {
  display: grid;
  grid-template-columns: repeat(2, minmax(160px, 1fr));
  gap: 10px;
}

@media (max-width: 520px) {
  .options { grid-template-columns: 1fr; }
}

.opt {
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.03);
  border-radius: 14px;
  padding: 12px 12px;
  cursor: pointer;
  text-align: left;
  transition: transform 0.05s ease, border-color 0.2s ease;
}
.opt:hover { transform: translateY(-1px); border-color: rgba(87,130,255,0.45); }
.opt .optTitle { font-weight: 800; }
.opt .optSub { color: var(--muted); font-size: 12px; margin-top: 4px; }

.actions {
  display: flex;
  gap: 10px;
  margin-top: 14px;
}

.btn {
  border: 1px solid rgba(87,130,255,0.55);
  background: rgba(87,130,255,0.18);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 12px;
  cursor: pointer;
  font-weight: 700;
}
.btn:hover { border-color: rgba(87,130,255,0.85); }

.btn.secondary {
  border-color: rgba(255,207,90,0.55);
  background: rgba(255,207,90,0.12);
}
.btn.secondary:hover { border-color: rgba(255,207,90,0.85); }

.btn.ghost {
  border-color: var(--border);
  background: rgba(255,255,255,0.03);
  color: var(--muted);
}
.btn.ghost:hover { color: var(--text); }

.feedback {
  margin-top: 12px;
  font-weight: 800;
  min-height: 22px;
}
.feedback.good { color: var(--good); }
.feedback.bad { color: var(--bad); }
.feedback.warn { color: var(--warn); }

.hintBox {
  margin-top: 10px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px dashed rgba(255,207,90,0.55);
  background: rgba(255,207,90,0.08);
  color: var(--text);
}

.path {
  margin-top: 14px;
  border-top: 1px solid var(--border);
  padding-top: 12px;
}
.pathTitle { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.5px; }
.breadcrumbs { margin-top: 8px; color: var(--text); font-weight: 700; }

.note {
  margin-top: 12px;
  color: var(--muted);
  font-size: 13px;
}

.leaderboard table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.leaderboard th, .leaderboard td {
  border-bottom: 1px solid var(--border);
  padding: 10px 6px;
  text-align: left;
}
.leaderboard th { color: var(--muted); font-weight: 800; font-size: 12px; }
.leaderboard .rank { width: 44px; color: var(--muted); }
.leaderboard .time { white-space: nowrap; color: var(--muted); }

.muted { color: var(--muted); margin-top: 8px; }

/* Overlay */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.65);
  display: grid;
  place-items: center;
  padding: 18px;
  z-index: 20;
}

.overlayInner {
  width: min(720px, 100%);
  background: linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0.03));
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 16px;
}

.overlayHeader {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 12px;
}

.overlayTitle { font-weight: 900; font-size: 18px; }
.overlaySub { color: var(--muted); margin-top: 4px; font-size: 13px; }

.replay {
  padding: 14px 0;
}
.replayTitle { color: var(--muted); font-weight: 800; font-size: 12px; letter-spacing: 0.5px; text-transform: uppercase; }
.replayStep { margin-top: 10px; font-size: 17px; font-weight: 900; }
.replayExplain { margin-top: 8px; color: var(--muted); line-height: 1.4; }

.overlayFooter {
  border-top: 1px solid var(--border);
  padding-top: 12px;
  display: flex;
  justify-content: flex-end;
}

/* Ensure HTML [hidden] works even when overlay sets display */
.overlay[hidden]{ display:none !important; }