:root {
  --ikea-blue: #0058a3;
  --ikea-blue-dark: #003e75;
  --ikea-yellow: #ffdb00;
  --ikea-yellow-soft: #fff6b3;
  --thor-crimson: #c62828;
  --thor-gold: #f59e0b;
  --thor-cyan: #0284c7;
  --thor-dark: #1e1b4b;
  --bg-page: #f4f5f7;
  --bg-card: #ffffff;
  --text-main: #111827;
  --text-muted: #4b5563;
  --border-subtle: #e5e7eb;
  --correct-bg: #ecfdf5;
  --correct-border: #10b981;
  --correct-text: #065f46;
  --wrong-bg: #fef2f2;
  --wrong-border: #ef4444;
  --wrong-text: #991b1b;
  --shadow-card: 0 10px 25px -5px rgba(15, 23, 42, 0.08), 0 4px 10px -2px rgba(15, 23, 42, 0.04);
  --shadow-hover: 0 20px 30px -10px rgba(15, 23, 42, 0.14), 0 8px 15px -4px rgba(15, 23, 42, 0.06);
  --radius-lg: 16px;
  --radius-md: 10px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-page);
  background-image:
    radial-gradient(circle at 12% 10%, rgba(0, 88, 163, 0.06) 0%, transparent 35%),
    radial-gradient(circle at 88% 15%, rgba(198, 40, 40, 0.06) 0%, transparent 35%);
  color: var(--text-main);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Top decorative ribbon */
.realm-ribbon {
  display: flex;
  height: 8px;
  width: 100%;
}
.ribbon-ikea {
  flex: 1;
  background: linear-gradient(90deg, var(--ikea-blue) 0%, var(--ikea-blue) 70%, var(--ikea-yellow) 70%, var(--ikea-yellow) 100%);
}
.ribbon-thor {
  flex: 1;
  background: linear-gradient(90deg, var(--thor-gold) 0%, var(--thor-crimson) 35%, var(--thor-dark) 100%);
}

/* Hero Header */
.hero {
  background: #ffffff;
  border-bottom: 1px solid var(--border-subtle);
  padding: 2.5rem 1.25rem 2rem;
  text-align: center;
}

.hero-inner {
  max-width: 820px;
  margin: 0 auto;
}

.hero-badges {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  text-transform: uppercase;
}

.badge .icon {
  width: 15px;
  height: 15px;
}

.badge-ikea {
  background: var(--ikea-blue);
  color: var(--ikea-yellow);
  box-shadow: 0 2px 6px rgba(0, 88, 163, 0.25);
}

.badge-thor {
  background: var(--thor-dark);
  color: #fbbf24;
  box-shadow: 0 2px 6px rgba(30, 27, 75, 0.25);
}

.badge-vs {
  font-size: 0.75rem;
  font-weight: 900;
  color: var(--text-muted);
}

.hero-title {
  font-size: clamp(1.85rem, 4.5vw, 3.1rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 0.85rem;
}

.highlight-ikea {
  color: var(--ikea-blue);
  background: var(--ikea-yellow);
  padding: 0.05em 0.32em;
  border-radius: 8px;
  display: inline-block;
}

.highlight-thor {
  color: #ffffff;
  background: linear-gradient(135deg, var(--thor-crimson), var(--thor-dark));
  padding: 0.05em 0.35em;
  border-radius: 8px;
  display: inline-block;
}

.hero-subtitle {
  font-size: 1.08rem;
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto;
}

/* Sticky HUD Bar */
.hud-bar {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-subtle);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
}

.hud-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0.7rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.hud-stats {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-wrap: wrap;
}

.stat-pill {
  background: #f8fafc;
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 0.35rem 0.75rem;
  display: flex;
  align-items: baseline;
  gap: 0.45rem;
}

.stat-label {
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.stat-value {
  font-size: 0.98rem;
  font-weight: 800;
  color: var(--text-main);
  font-variant-numeric: tabular-nums;
}

.hud-controls {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.mode-switch {
  display: inline-flex;
  background: #f1f5f9;
  padding: 3px;
  border-radius: 9px;
  border: 1px solid var(--border-subtle);
}

.mode-btn {
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.82rem;
  font-weight: 700;
  padding: 0.38rem 0.75rem;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.mode-btn.active {
  background: #ffffff;
  color: var(--text-main);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.action-btn {
  border: 1px solid var(--border-subtle);
  background: #ffffff;
  color: var(--text-main);
  font-size: 0.82rem;
  font-weight: 700;
  padding: 0.45rem 0.85rem;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.action-btn:hover {
  background: #f8fafc;
  border-color: #cbd5e1;
}

.progress-track {
  height: 4px;
  width: 100%;
  background: #e2e8f0;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--ikea-blue), var(--thor-crimson));
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Main Container */
.main-container {
  max-width: 1180px;
  width: 100%;
  margin: 0 auto;
  padding: 2rem 1.25rem 3.5rem;
  flex: 1;
}

.hidden {
  display: none !important;
}

/* Grid & Duel Layouts */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(335px, 1fr));
  gap: 1.5rem;
  align-items: start;
}

.cards-grid.duel-mode {
  grid-template-columns: minmax(320px, 560px);
  justify-content: center;
}

.duel-nav {
  max-width: 560px;
  margin: 0 auto 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  background: #ffffff;
  padding: 0.75rem 1rem;
  border-radius: 12px;
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-card);
}

.duel-counter {
  font-size: 0.88rem;
  color: var(--text-muted);
  text-align: center;
}

.kbd-hint {
  display: block;
  font-size: 0.74rem;
  color: #64748b;
  margin-top: 0.15rem;
}

kbd {
  background: #f1f5f9;
  border: 1px solid #cbd5e1;
  border-radius: 4px;
  padding: 0.05rem 0.35rem;
  font-family: monospace;
  font-size: 0.72rem;
}

.duel-nav-btn {
  border: 1px solid var(--border-subtle);
  background: #f8fafc;
  color: var(--text-main);
  font-weight: 700;
  font-size: 0.82rem;
  padding: 0.45rem 0.8rem;
  border-radius: 8px;
  cursor: pointer;
}

.duel-nav-btn:hover:not(:disabled) {
  background: #e2e8f0;
}

.duel-nav-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

/* Individual Quiz Card */
.quiz-card {
  background: var(--bg-card);
  border: 2px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.2s ease;
  display: flex;
  flex-direction: column;
}

.quiz-card:hover {
  box-shadow: var(--shadow-hover);
}

.quiz-card.answered-correct {
  border-color: var(--correct-border);
}

.quiz-card.answered-wrong {
  border-color: var(--wrong-border);
}

.card-header {
  padding: 1.6rem 1.5rem 1.25rem;
  text-align: center;
  position: relative;
}

.card-number {
  position: absolute;
  top: 0.85rem;
  left: 1rem;
  font-size: 0.72rem;
  font-weight: 800;
  color: #9ca3af;
  letter-spacing: 0.06em;
}

.card-status-pill {
  position: absolute;
  top: 0.75rem;
  right: 1rem;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.status-correct {
  background: var(--correct-bg);
  color: var(--correct-text);
  border: 1px solid var(--correct-border);
}

.status-wrong {
  background: var(--wrong-bg);
  color: var(--wrong-text);
  border: 1px solid var(--wrong-border);
}

.item-name {
  font-size: 1.95rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  color: var(--text-main);
  margin-top: 0.4rem;
  text-transform: uppercase;
}

.item-pronunciation {
  font-size: 0.83rem;
  color: #6b7280;
  font-style: italic;
  margin-top: 0.2rem;
}

/* Choice Buttons */
.choice-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  padding: 0 1.35rem 1.45rem;
}

.choice-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.9rem 0.75rem;
  border-radius: var(--radius-md);
  border: 2px solid var(--border-subtle);
  background: #f9fafb;
  color: var(--text-main);
  font-weight: 800;
  font-size: 0.92rem;
  cursor: pointer;
  transition: all 0.16s ease;
}

.choice-btn .choice-emoji {
  font-size: 1.45rem;
  line-height: 1;
}

.choice-btn-ikea:hover:not(:disabled) {
  background: var(--ikea-blue);
  color: var(--ikea-yellow);
  border-color: var(--ikea-blue);
  transform: translateY(-2px);
}

.choice-btn-thor:hover:not(:disabled) {
  background: var(--thor-dark);
  color: #fbbf24;
  border-color: var(--thor-dark);
  transform: translateY(-2px);
}

.choice-btn:disabled {
  cursor: default;
  opacity: 0.55;
}

.choice-btn.selected-correct {
  background: var(--correct-bg) !important;
  border-color: var(--correct-border) !important;
  color: var(--correct-text) !important;
  opacity: 1 !important;
}

.choice-btn.selected-wrong {
  background: var(--wrong-bg) !important;
  border-color: var(--wrong-border) !important;
  color: var(--wrong-text) !important;
  opacity: 1 !important;
}

.choice-btn.actual-answer-highlight {
  border-color: var(--correct-border) !important;
  opacity: 0.95 !important;
}

/* Answer Reveal Panel */
.reveal-panel {
  border-top: 1px solid var(--border-subtle);
  background: #fafafa;
  padding: 1.25rem 1.35rem 1.4rem;
  animation: slideReveal 0.25s ease-out;
}

@keyframes slideReveal {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.verdict-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.55rem 0.85rem;
  border-radius: 8px;
  font-weight: 800;
  font-size: 0.88rem;
  margin-bottom: 1rem;
}

.verdict-banner.verdict-correct {
  background: var(--correct-bg);
  color: var(--correct-text);
  border: 1px solid #a7f3d0;
}

.verdict-banner.verdict-wrong {
  background: var(--wrong-bg);
  color: var(--wrong-text);
  border: 1px solid #fecaca;
}

.reveal-media {
  position: relative;
  width: 100%;
  height: 230px;
  background: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.reveal-media img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #ffffff;
  transition: transform 0.3s ease;
}

.quiz-card:hover .reveal-media img {
  transform: scale(1.03);
}

.category-tag {
  position: absolute;
  bottom: 0.6rem;
  left: 0.6rem;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 0.25rem 0.6rem;
  border-radius: 6px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.tag-ikea {
  background: var(--ikea-blue);
  color: var(--ikea-yellow);
}

.tag-thor {
  background: var(--thor-dark);
  color: #fbbf24;
}

.meta-tag {
  position: absolute;
  bottom: 0.6rem;
  right: 0.6rem;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.22rem 0.55rem;
  border-radius: 6px;
  background: rgba(17, 24, 39, 0.82);
  color: #ffffff;
}

.reveal-title {
  font-size: 1rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 0.35rem;
}

.reveal-description {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.deception-box {
  background: #ffffff;
  border-left: 3px solid var(--ikea-blue);
  padding: 0.55rem 0.75rem;
  border-radius: 0 6px 6px 0;
  font-size: 0.82rem;
  color: #374151;
}

.quiz-card[data-category="thor"] .deception-box {
  border-left-color: var(--thor-crimson);
}

/* Final Summary Card */
.final-summary {
  margin-bottom: 2.25rem;
}

.final-card {
  background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
  border: 2px solid var(--ikea-blue);
  border-radius: 20px;
  padding: 2.25rem 1.5rem;
  text-align: center;
  box-shadow: var(--shadow-hover);
  max-width: 680px;
  margin: 0 auto;
}

.final-eyebrow {
  font-size: 0.75rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  color: var(--ikea-blue);
  margin-bottom: 0.5rem;
}

.final-rank-title {
  font-size: 1.85rem;
  font-weight: 900;
  margin-bottom: 0.5rem;
}

.final-rank-desc {
  color: var(--text-muted);
  max-width: 520px;
  margin: 0 auto 1.25rem;
}

.final-score-big {
  font-size: 3.25rem;
  font-weight: 900;
  color: var(--text-main);
  line-height: 1;
  margin-bottom: 1rem;
}

.final-score-denom {
  font-size: 1.6rem;
  color: #9ca3af;
}

.final-emoji-grid {
  font-size: 1.35rem;
  letter-spacing: 0.2rem;
  margin-bottom: 1.5rem;
  word-break: break-word;
}

.final-actions {
  display: flex;
  justify-content: center;
  gap: 0.85rem;
  flex-wrap: wrap;
}

.btn-primary {
  background: var(--ikea-blue);
  color: var(--ikea-yellow);
  border: none;
  font-weight: 800;
  font-size: 0.95rem;
  padding: 0.75rem 1.35rem;
  border-radius: 10px;
  cursor: pointer;
}

.btn-primary:hover {
  background: var(--ikea-blue-dark);
}

.btn-secondary {
  background: #ffffff;
  color: var(--text-main);
  border: 2px solid var(--border-subtle);
  font-weight: 800;
  font-size: 0.95rem;
  padding: 0.75rem 1.35rem;
  border-radius: 10px;
  cursor: pointer;
}

.site-footer {
  text-align: center;
  padding: 1.75rem 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-subtle);
  background: #ffffff;
}

.site-footer a {
  color: var(--ikea-blue);
  font-weight: 700;
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
}

@media (max-width: 640px) {
  .hud-inner {
    flex-direction: column;
    align-items: stretch;
  }
  .hud-stats, .hud-controls {
    justify-content: center;
  }
}