:root {
  --shell-bg-1: #07132f;
  --shell-bg-2: #0b1d4d;
  --shell-card: rgba(10, 24, 61, 0.92);
  --shell-border: rgba(96, 165, 250, 0.22);
  --shell-text: #f8fbff;
  --shell-muted: #c7d7f4;
  --shell-accent: #38bdf8;
  --shell-accent-2: #22c55e;
  --shell-shadow: 0 18px 45px rgba(2, 8, 23, 0.34);
}

body.game-shell-enabled {
  background:
    radial-gradient(circle at top, rgba(56, 189, 248, 0.2), transparent 30%),
    linear-gradient(180deg, var(--shell-bg-2) 0%, var(--shell-bg-1) 100%);
  min-height: 100vh;
  color: var(--shell-text);
}

body.game-shell-enabled .app {
  max-width: 1180px;
  margin: 0 auto;
  padding: 18px 16px 40px;
}

body.game-shell-enabled .card,
body.game-shell-enabled .app-header,
body.game-shell-enabled .main-layout,
body.game-shell-enabled .nine-card,
body.game-shell-enabled .leaderboard-card,
body.game-shell-enabled .setup-card,
body.game-shell-enabled .game-card,
body.game-shell-enabled .game-over,
body.game-shell-enabled .footer-card {
  box-shadow: var(--shell-shadow);
  border: 1px solid rgba(96, 165, 250, 0.18);
}

body.game-shell-enabled .app-header,
body.game-shell-enabled header {
  background: linear-gradient(180deg, rgba(5, 20, 56, 0.96), rgba(7, 28, 74, 0.92)) !important;
  border-radius: 20px;
}

body.game-shell-enabled .app-header h1,
body.game-shell-enabled header h1,
body.game-shell-enabled .app-header strong,
body.game-shell-enabled header strong,
body.game-shell-enabled .subtitle {
  color: #f8fbff !important;
}

body.game-shell-enabled .subtitle {
  line-height: 1.5;
  font-size: 1.05rem;
  opacity: 1 !important;
  max-width: 880px;
  margin: 14px auto 0;
  text-align: center;
}

body.game-shell-enabled .subtitle strong {
  color: #7dd3fc !important;
}

.game-shell-bar {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 14px;
  align-items: stretch;
  margin: 16px 0 20px;
}

.game-shell-panel {
  background: linear-gradient(135deg, rgba(9, 21, 54, 0.96), rgba(13, 31, 76, 0.93));
  color: var(--shell-text);
  border: 1px solid var(--shell-border);
  border-radius: 18px;
  box-shadow: var(--shell-shadow);
  padding: 16px 18px;
}

.game-shell-panel h2,
.game-shell-panel h3,
.game-shell-panel p {
  color: inherit;
  margin: 0;
}

.game-shell-title {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.game-shell-title strong {
  font-size: 1.08rem;
}

.game-shell-kicker {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  background: rgba(56, 189, 248, 0.16);
  color: #bae6fd;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.game-shell-copy {
  color: var(--shell-muted);
  line-height: 1.5;
}

.game-shell-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.game-shell-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 42px;
  border-radius: 14px;
  padding: 0.7rem 0.9rem;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255,255,255,0.12);
  color: var(--shell-text);
}

.game-shell-chip-label {
  display: block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #d4def7;
}

.game-shell-chip-value {
  display: block;
  font-weight: 700;
  color: #fff;
}

.game-shell-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.game-shell-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0.75rem 1rem;
  border-radius: 12px;
  font-weight: 700;
  text-decoration: none;
  border: 1px solid rgba(255,255,255,0.16);
  transition: transform .15s ease, background .15s ease;
}
.game-shell-link:hover { transform: translateY(-1px); }
.game-shell-link.primary {
  color: #082f49;
  background: linear-gradient(135deg, #7dd3fc, #22d3ee);
}
.game-shell-link.secondary {
  color: #fff;
  background: rgba(255,255,255,0.08);
}

.game-shell-score-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.game-shell-score-value {
  font-size: clamp(2rem, 4vw, 2.8rem);
  line-height: 1;
  font-weight: 800;
  color: #fff;
  margin: 8px 0;
}

.game-shell-score-note {
  color: #dbeafe;
  font-size: 0.95rem;
  line-height: 1.45;
}

.game-shell-callout {
  margin-top: 10px;
  padding: 0.8rem 0.95rem;
  border-radius: 14px;
  background: rgba(34, 197, 94, 0.14);
  border: 1px solid rgba(34, 197, 94, 0.24);
  color: #dcfce7;
}

.game-shell-callout.warning {
  background: rgba(245, 158, 11, 0.14);
  border-color: rgba(245, 158, 11, 0.26);
  color: #fef3c7;
}

.game-shell-footer {
  margin-top: 22px;
  padding: 18px 20px;
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(9,21,54,0.96), rgba(13,31,76,0.93));
  color: var(--shell-text);
  border: 1px solid var(--shell-border);
  box-shadow: var(--shell-shadow);
}

.game-shell-footer-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.game-shell-footer p { margin: 0; color: var(--shell-muted); }

.return-menu .btn.secondary,
.return-menu a.btn.secondary {
  background: linear-gradient(135deg, #2563eb, #1d4ed8) !important;
  border: none !important;
  color: #fff !important;
  box-shadow: 0 10px 24px rgba(37, 99, 235, 0.25);
}

.leaderboard-table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border-radius: 12px;
  background: rgba(10, 24, 61, 0.9);
}

.leaderboard-table th,
.leaderboard-table td {
  padding: 0.75rem 0.8rem;
  text-align: left;
  border-bottom: 1px solid rgba(59, 130, 246, 0.2);
  color: #eff6ff;
}

.leaderboard-table th {
  background: rgba(14, 165, 233, 0.18);
  color: #bae6fd;
}

.leaderboard-note { line-height: 1.45; color: #c7d7f4; }

@media (max-width: 900px) {
  .game-shell-bar {
    grid-template-columns: 1fr;
  }
}

/* Shared deep-unification layer */
body.game-shell-enabled .question-panel,
body.game-shell-enabled .help-panel,
body.game-shell-enabled .question-card,
body.game-shell-enabled .setup-card,
body.game-shell-enabled .game-card,
body.game-shell-enabled .leaderboard-card,
body.game-shell-enabled .footer-card,
body.game-shell-enabled .nine-card,
body.game-shell-enabled .interface-panel,
body.game-shell-enabled .side-panel,
body.game-shell-enabled .panel,
body.game-shell-enabled .card.shared-game-card,
body.game-shell-enabled #leaderboardContainer,
body.game-shell-enabled #leaderboardContainerCard {
  background: linear-gradient(180deg, rgba(8, 22, 56, 0.94), rgba(10, 29, 72, 0.92)) !important;
  border: 1px solid rgba(96, 165, 250, 0.2) !important;
  border-radius: 22px;
  box-shadow: 0 18px 38px rgba(2, 8, 23, 0.22);
  color: #f8fbff;
}

body.game-shell-enabled .question-panel h1,
body.game-shell-enabled .question-panel h2,
body.game-shell-enabled .help-panel h2,
body.game-shell-enabled .question-card h2,
body.game-shell-enabled .setup-card h2,
body.game-shell-enabled .game-card h2,
body.game-shell-enabled .leaderboard-card h2,
body.game-shell-enabled .leaderboard-card h3,
body.game-shell-enabled .footer-card h2,
body.game-shell-enabled .footer-card h3,
body.game-shell-enabled .interface-panel h2,
body.game-shell-enabled .interface-panel h3,
body.game-shell-enabled .card.shared-game-card h2,
body.game-shell-enabled .card.shared-game-card h3,
body.game-shell-enabled #leaderboardContainer h2,
body.game-shell-enabled #leaderboardContainerCard h2 {
  color: #f8fbff !important;
}

body.game-shell-enabled .question-panel p,
body.game-shell-enabled .help-panel p,
body.game-shell-enabled .question-card p,
body.game-shell-enabled .setup-card p,
body.game-shell-enabled .game-card p,
body.game-shell-enabled .leaderboard-card p,
body.game-shell-enabled .footer-card p,
body.game-shell-enabled .interface-panel p,
body.game-shell-enabled .card.shared-game-card p,
body.game-shell-enabled .subtitle,
body.game-shell-enabled .hint,
body.game-shell-enabled .leaderboard-note,
body.game-shell-enabled .feedback,
body.game-shell-enabled .explanation,
body.game-shell-enabled .help-panel li,
body.game-shell-enabled .card.shared-game-card li,
body.game-shell-enabled #leaderboardContainer p,
body.game-shell-enabled #leaderboardContainerCard p {
  color: #c7d7f4 !important;
}

body.game-shell-enabled .question-text,
body.game-shell-enabled #questionText,
body.game-shell-enabled .feedback strong,
body.game-shell-enabled .question-card strong,
body.game-shell-enabled .leaderboard-card strong {
  color: #f8fbff !important;
}

body.game-shell-enabled .hud,
body.game-shell-enabled .score-chip-row,
body.game-shell-enabled .score-panel,
body.game-shell-enabled .hud.shared-game-hud {
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.14), rgba(29, 78, 216, 0.12));
  border: 1px solid rgba(96, 165, 250, 0.35);
  border-radius: 18px;
  padding: 0.85rem 1rem;
  color: #dbeafe;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.06);
}

body.game-shell-enabled .hud div,
body.game-shell-enabled .score-chip-row .chip,
body.game-shell-enabled .score-panel .chip,
body.game-shell-enabled .hud span,
body.game-shell-enabled .score-chip-row strong,
body.game-shell-enabled .score-panel strong,
body.game-shell-enabled .progress-chip strong {
  color: #f8fbff !important;
  font-weight: 800;
}

body.game-shell-enabled .answers,
body.game-shell-enabled .answers-grid,
body.game-shell-enabled .option-grid,
body.game-shell-enabled .button-grid {
  gap: 0.85rem;
}

body.game-shell-enabled .answer-option,
body.game-shell-enabled .answer-btn,
body.game-shell-enabled .answers button,
body.game-shell-enabled .option-btn,
body.game-shell-enabled .choice-btn,
body.game-shell-enabled .btn,
body.game-shell-enabled button,
body.game-shell-enabled a.btn {
  border-radius: 16px;
  border: 1px solid rgba(96,165,250,0.26);
  background: linear-gradient(180deg, rgba(11, 33, 80, 0.98), rgba(9, 24, 61, 0.98));
  color: #f8fbff;
  box-shadow: 0 10px 24px rgba(2,8,23,0.16);
}

body.game-shell-enabled .answer-option:hover,
body.game-shell-enabled .answer-btn:hover,
body.game-shell-enabled .answers button:hover,
body.game-shell-enabled .option-btn:hover,
body.game-shell-enabled .choice-btn:hover,
body.game-shell-enabled .answer-option:focus-visible,
body.game-shell-enabled .answer-btn:focus-visible,
body.game-shell-enabled .answers button:focus-visible,
body.game-shell-enabled .option-btn:focus-visible,
body.game-shell-enabled .choice-btn:focus-visible,
body.game-shell-enabled .btn:hover,
body.game-shell-enabled button:hover,
body.game-shell-enabled a.btn:hover {
  border-color: rgba(56,189,248,0.9);
  box-shadow: 0 14px 28px rgba(14,165,233,0.2);
  transform: translateY(-1px);
}

body.game-shell-enabled .btn.primary,
body.game-shell-enabled button.primary,
body.game-shell-enabled .game-shell-link.primary {
  color: #082f49 !important;
  background: linear-gradient(135deg, #67e8f9, #38bdf8) !important;
  border-color: transparent !important;
}

body.game-shell-enabled .answer-option.correct,
body.game-shell-enabled .answer-btn.correct,
body.game-shell-enabled .answers button.correct,
body.game-shell-enabled .option-btn.correct,
body.game-shell-enabled .choice-btn.correct {
  background: linear-gradient(135deg, rgba(34,197,94,0.34), rgba(22,163,74,0.24));
  border-color: rgba(74, 222, 128, 0.7);
  color: #dcfce7;
}

body.game-shell-enabled .answer-option.incorrect,
body.game-shell-enabled .answer-btn.wrong,
body.game-shell-enabled .answer-btn.incorrect,
body.game-shell-enabled .answers button.wrong,
body.game-shell-enabled .answers button.incorrect,
body.game-shell-enabled .option-btn.wrong,
body.game-shell-enabled .choice-btn.wrong {
  background: linear-gradient(135deg, rgba(239,68,68,0.28), rgba(127,29,29,0.22));
  border-color: rgba(248, 113, 113, 0.55);
  color: #fee2e2;
}

body.game-shell-enabled .shared-result-screen,
body.game-shell-enabled .game-over,
body.game-shell-enabled .modal,
body.game-shell-enabled [id*="gameOver"],
body.game-shell-enabled [id*="Result"],
body.game-shell-enabled [id*="result"] {
  border-radius: 24px;
  border: 1px solid rgba(96, 165, 250, 0.3);
  background: linear-gradient(135deg, rgba(8,22,56,0.98), rgba(10,29,72,0.98));
  box-shadow: 0 22px 44px rgba(2,8,23,0.24);
  color: #f8fbff;
}

body.game-shell-enabled .shared-result-screen h2,
body.game-shell-enabled .game-over h2,
body.game-shell-enabled .modal h2,
body.game-shell-enabled [id*="gameOver"] h2,
body.game-shell-enabled [id*="Result"] h2,
body.game-shell-enabled [id*="result"] h2 {
  color: #f8fbff;
  margin-top: 0;
}

body.game-shell-enabled .shared-result-screen p,
body.game-shell-enabled .game-over p,
body.game-shell-enabled .modal p,
body.game-shell-enabled [id*="gameOver"] p,
body.game-shell-enabled [id*="Result"] p,
body.game-shell-enabled [id*="result"] p {
  color: #c7d7f4;
}

body.game-shell-enabled .shared-leaderboard-card,
body.game-shell-enabled .leaderboard-card,
body.game-shell-enabled .leaderboard-list,
body.game-shell-enabled #leaderboardContainer,
body.game-shell-enabled #leaderboardContainerCard {
  border-radius: 20px;
}

body.game-shell-enabled .leaderboard-card,
body.game-shell-enabled #leaderboardContainerCard,
body.game-shell-enabled #leaderboardContainer {
  background: linear-gradient(180deg, rgba(8,22,56,0.94), rgba(10,29,72,0.92));
  border: 1px solid rgba(96,165,250,0.2);
  padding: 1rem 1.05rem;
}

body.game-shell-enabled .leaderboard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
  padding-bottom: 0.85rem;
  margin-bottom: 0.85rem;
  border-bottom: 1px solid rgba(96,165,250,0.18);
}

body.game-shell-enabled .leaderboard-list {
  display: grid;
  gap: 0.8rem;
}

body.game-shell-enabled .leaderboard-entry,
body.game-shell-enabled .leaderboard-item,
body.game-shell-enabled .leaderboard-row,
body.game-shell-enabled .leaderboard-list > div,
body.game-shell-enabled .leaderboard-list > li,
body.game-shell-enabled #leaderboardContainer > div,
body.game-shell-enabled #leaderboardContainer > li {
  background: linear-gradient(180deg, rgba(10, 29, 72, 0.98), rgba(12, 37, 89, 0.96));
  border: 1px solid rgba(96,165,250,0.24);
  border-radius: 16px;
  padding: 0.85rem 0.95rem;
  box-shadow: 0 8px 18px rgba(2,8,23,0.1);
  color: #eff6ff;
  list-style: none;
}

body.game-shell-enabled .leaderboard-list ol,
body.game-shell-enabled .leaderboard-list ul,
body.game-shell-enabled #leaderboardContainer ol,
body.game-shell-enabled #leaderboardContainer ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.8rem;
}

body.game-shell-enabled .lb-tab,
body.game-shell-enabled .leaderboard-tabs button {
  border-radius: 999px;
  border: 1px solid rgba(96,165,250,0.3);
  background: rgba(8,22,56,0.96);
  color: #dbeafe;
  padding: 0.55rem 0.9rem;
  font-weight: 700;
}

body.game-shell-enabled .lb-tab.active,
body.game-shell-enabled .leaderboard-tabs button.active {
  background: linear-gradient(135deg, #0ea5e9, #38bdf8);
  color: #fff;
  border-color: transparent;
}

body.game-shell-enabled .shared-game-footer-actions,
body.game-shell-enabled .return-menu {
  margin-top: 20px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
}

body.game-shell-enabled .field-row,
body.game-shell-enabled .control-row,
body.game-shell-enabled .setup-card .field-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

body.game-shell-enabled .field-row label,
body.game-shell-enabled .control-row label,
body.game-shell-enabled .setup-card label {
  color: #dbeafe;
  font-weight: 700;
}

body.game-shell-enabled select,
body.game-shell-enabled input:not([type="hidden"]),
body.game-shell-enabled textarea {
  background: rgba(2, 8, 23, 0.42);
  color: #f8fbff;
  border: 1px solid rgba(96,165,250,0.35);
  border-radius: 14px;
  padding: 0.75rem 0.9rem;
}

body.game-shell-enabled select option {
  background: #0b1738;
  color: #f8fbff;
}

body.game-shell-enabled .game-shell-hidden-name-row {
  display: none !important;
}

@media (max-width: 720px) {
  body.game-shell-enabled .leaderboard-header {
    align-items: flex-start;
  }

  body.game-shell-enabled .hud,
  body.game-shell-enabled .score-chip-row,
  body.game-shell-enabled .score-panel {
    padding: 0.75rem 0.8rem;
  }
}


/* Cleanup pass: remove legacy leaderboard tabs and force dark setup surfaces */
body.game-shell-enabled .leaderboard-tabs,
body.game-shell-enabled .lb-tab {
  display: none !important;
}

body.game-shell-enabled .setup-card,
body.game-shell-enabled .setup-card.shared-game-card,
body.game-shell-enabled .setup-row,
body.game-shell-enabled .field-row,
body.game-shell-enabled .control-row,
body.game-shell-enabled .form-row {
  background: transparent !important;
}

body.game-shell-enabled .setup-card input:not([type="hidden"]),
body.game-shell-enabled .setup-card select,
body.game-shell-enabled .setup-card textarea,
body.game-shell-enabled .field-row input:not([type="hidden"]),
body.game-shell-enabled .field-row select,
body.game-shell-enabled .control-row input:not([type="hidden"]),
body.game-shell-enabled .control-row select {
  background: rgba(5, 15, 38, 0.96) !important;
  color: #f8fbff !important;
  border: 1px solid rgba(96,165,250,0.35) !important;
  box-shadow: none !important;
}

body.game-shell-enabled .leaderboard-card h1,
body.game-shell-enabled .leaderboard-card h3,
body.game-shell-enabled #leaderboardContainerCard h1,
body.game-shell-enabled #leaderboardContainerCard h3,
body.game-shell-enabled .leaderboard-list h3 {
  color: #f8fbff !important;
}

body.game-shell-enabled .leaderboard-card .leaderboard-note,
body.game-shell-enabled .leaderboard-card p,
body.game-shell-enabled #leaderboardContainerCard p {
  color: #c7d7f4 !important;
}

body.game-shell-enabled .helper-text,
body.game-shell-enabled .intro,
body.game-shell-enabled .intro-text,
body.game-shell-enabled .subtitle,
body.game-shell-enabled .app-header p,
body.game-shell-enabled header p {
  color: #dbeafe !important;
  opacity: 1 !important;
}

body.game-shell-enabled .shared-class-leaderboard {
  display: grid;
  gap: 16px;
}

body.game-shell-enabled .leaderboard-intro {
  color: #dbeafe !important;
  margin: 4px 0 0;
}

body.game-shell-enabled .leaderboard-summary-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

body.game-shell-enabled .leaderboard-summary-card {
  background: rgba(7, 21, 51, 0.92);
  border: 1px solid rgba(96,165,250,0.22);
  border-radius: 16px;
  padding: 14px 16px;
  box-shadow: var(--shell-shadow);
}

body.game-shell-enabled .leaderboard-summary-label {
  display: block;
  color: #93c5fd;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

body.game-shell-enabled .leaderboard-summary-card strong {
  color: #f8fbff;
  font-size: 1rem;
}