/* ======== BRAIN QUEST NEUROSCIENCE STYLES ======== */
/* Purple cosmic theme */

/* ---- ANIMATIONS ---- */
@keyframes neuro-pulse {
  0%, 100% { filter: brightness(1.3) drop-shadow(0 0 6px currentColor); }
  50% { filter: brightness(1.6) drop-shadow(0 0 14px currentColor); }
}

@keyframes neuro-fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---- BACK BUTTON ---- */
.neuro-back-row {
  margin-bottom: var(--space-3);
}

/* ---- HOME ---- */
.neuro-home {
  max-width: 700px;
  margin: 0 auto;
  padding-bottom: var(--space-8);
}

.neuro-header {
  margin-bottom: var(--space-4);
}

.neuro-home h1 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  margin: var(--space-2) 0 var(--space-1);
}

.neuro-subtitle {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  margin-bottom: var(--space-4);
}

/* Stats bar */
.neuro-stats-bar {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-5);
}

.neuro-stat-chip {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface-2);
  border-radius: var(--radius-full, 50px);
  font-size: var(--text-sm);
  font-weight: 600;
}

/* ---- ACTIVITY CARDS GRID ---- */
.neuro-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-4);
}

.neuro-activity-card {
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg, 16px);
  padding: var(--space-4) var(--space-5);
  cursor: pointer;
  transition: transform 0.15s, border-color 0.15s, box-shadow 0.15s;
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
}

.neuro-activity-card:hover {
  transform: translateY(-3px);
  border-color: #9c6ade;
  box-shadow: 0 6px 20px rgba(156, 106, 222, 0.15);
}

.neuro-card-emoji {
  font-size: 2.5rem;
  flex-shrink: 0;
  line-height: 1;
}

.neuro-card-body {
  flex: 1;
  min-width: 0;
}

.neuro-card-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  margin: 0 0 var(--space-1);
}

.neuro-card-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin: 0 0 var(--space-2);
}

.neuro-card-progress {
  font-size: var(--text-xs, 0.75rem);
  color: #9c6ade;
  font-weight: 600;
}

/* ---- INNER NAV (tab bar) ---- */
.neuro-inner-nav {
  display: flex;
  justify-content: center;
  gap: 5px;
  padding: var(--space-2) var(--space-2) 0;
  flex-wrap: wrap;
  margin-bottom: var(--space-4);
}

.neuro-inner-btn {
  padding: 7px 12px;
  border: 2px solid var(--color-border);
  border-radius: 28px;
  background: var(--color-surface);
  color: var(--color-text-muted);
  font-family: var(--font-display);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.3s;
  font-weight: 700;
}

.neuro-inner-btn:hover {
  border-color: #9c6ade;
  color: inherit;
}

.neuro-inner-btn.active {
  background: #e94560;
  border-color: #e94560;
  color: #fff;
  transform: scale(1.05);
}

/* ---- LEVEL SELECTOR ---- */
.neuro-level-bar {
  display: flex;
  justify-content: center;
  gap: 0;
  padding: var(--space-3) var(--space-2) 0;
  margin-bottom: var(--space-2);
}

.neuro-level-toggle {
  display: flex;
  background: var(--color-surface);
  border-radius: 30px;
  border: 2px solid var(--color-border);
  overflow: hidden;
}

.neuro-lvl-btn {
  padding: 10px 22px;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: all 0.3s;
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: 7px;
  position: relative;
  font-weight: 700;
}

.neuro-lvl-btn:hover { color: inherit; }

.neuro-lvl-btn.active { color: #fff; }
.neuro-lvl-btn.beginner.active { background: #4caf50; }
.neuro-lvl-btn.intermediate.active { background: #4db6e5; }
.neuro-lvl-btn.advanced.active { background: #9c6ade; }

.neuro-level-desc {
  text-align: center;
  padding: var(--space-1) var(--space-2) 0;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-weight: 600;
  margin-bottom: var(--space-3);
}

/* ---- SECTION DISPLAY ---- */
.neuro-section {
  display: none;
  padding: var(--space-4);
  max-width: 1100px;
  margin: 0 auto;
}

.neuro-section.active {
  display: block;
  animation: neuro-fadeIn 0.4s;
}

/* ---- SHARED ---- */
.neuro-section-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  text-align: center;
  margin-bottom: var(--space-1);
}

.neuro-section-sub {
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  margin-bottom: var(--space-5);
}

/* XP progress bar */
.neuro-xp-wrap {
  max-width: 440px;
  margin: 0 auto var(--space-5);
}

.neuro-xp-row {
  display: flex;
  justify-content: space-between;
  font-size: var(--text-xs, 0.75rem);
  font-weight: 700;
  color: var(--color-text-muted);
  margin-bottom: 4px;
}

.neuro-xp-bg {
  height: 12px;
  background: var(--color-surface-2);
  border-radius: var(--radius-full, 50px);
  overflow: hidden;
}

.neuro-xp-fill {
  height: 100%;
  border-radius: var(--radius-full, 50px);
  transition: width 0.8s;
  width: 0%;
}

.neuro-xp-fill.beginner { background: linear-gradient(90deg, #4caf50, #81c784); }
.neuro-xp-fill.intermediate { background: linear-gradient(90deg, #4db6e5, #81d4fa); }
.neuro-xp-fill.advanced { background: linear-gradient(90deg, #9c6ade, #ce93d8); }

/* Fact box */
.neuro-fact-box {
  background: rgba(255, 215, 0, 0.08);
  border-left: 4px solid #ffd700;
  border-radius: 0 var(--radius-md, 12px) var(--radius-md, 12px) 0;
  padding: 11px 15px;
  margin-top: var(--space-3);
  font-size: var(--text-sm);
  line-height: 1.55;
}

.neuro-fact-box b {
  color: #ffd700;
}

/* Chip row */
.neuro-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: var(--space-3);
}

.neuro-chip {
  padding: 4px 11px;
  border-radius: 11px;
  font-size: 0.76rem;
  font-weight: 700;
  background: rgba(156, 106, 222, 0.1);
}

/* ---- BRAIN MAP SVG ---- */
.neuro-brain-layout {
  display: flex;
  gap: 26px;
  align-items: flex-start;
  justify-content: center;
  flex-wrap: wrap;
}

.neuro-brain-svg-wrap {
  width: 320px;
  flex-shrink: 0;
}

.neuro-brain-svg-wrap svg {
  width: 100%;
  height: auto;
  filter: drop-shadow(0 0 18px rgba(156, 106, 222, 0.12));
}

.neuro-brain-region {
  cursor: pointer;
  transition: all 0.3s;
  opacity: 0.65;
}

.neuro-brain-region:hover {
  opacity: 1;
  filter: brightness(1.4);
}

.neuro-brain-region.active {
  opacity: 1;
  animation: neuro-pulse 1.5s ease-in-out infinite;
}

.neuro-brain-label {
  font-size: 9px;
  font-weight: 700;
  fill: currentColor;
  pointer-events: none;
  text-anchor: middle;
}

/* Info panel */
.neuro-info-panel {
  flex: 1;
  min-width: 270px;
  max-width: 480px;
}

.neuro-info-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg, 16px);
  padding: var(--space-5);
  border: 2px solid var(--color-border);
  transition: border-color 0.3s;
}

.neuro-info-card.has {
  border-color: #9c6ade;
  box-shadow: 0 0 20px rgba(156, 106, 222, 0.1);
}

.neuro-info-ph {
  text-align: center;
  color: var(--color-text-muted);
  padding: 34px 14px;
}

.neuro-info-ph-big {
  font-size: 3.2rem;
  display: block;
  margin-bottom: var(--space-2);
}

.neuro-info-hdr {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: var(--space-3);
}

.neuro-info-emoji {
  font-size: 2.3rem;
}

.neuro-info-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
}

.neuro-info-sub {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.neuro-info-body p {
  font-size: var(--text-sm);
  line-height: 1.65;
  margin-bottom: 10px;
}

.neuro-info-body strong {
  color: #9c6ade;
}

/* ---- LEARN CARDS ---- */
.neuro-cgrid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin: var(--space-4) 0;
}

.neuro-ccard {
  background: var(--color-surface);
  border-radius: var(--radius-lg, 16px);
  padding: var(--space-5);
  border: 2px solid var(--color-border);
  transition: all 0.3s;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.neuro-ccard:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.neuro-ccard::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
}

.neuro-ccard.c1::before { background: #9c6ade; }
.neuro-ccard.c2::before { background: #4db6e5; }
.neuro-ccard.c3::before { background: #26c6a0; }
.neuro-ccard.c4::before { background: #f5a623; }
.neuro-ccard.c5::before { background: #e94560; }
.neuro-ccard.c6::before { background: #4caf50; }

.neuro-cc-icon {
  font-size: 2rem;
  margin-bottom: var(--space-2);
  display: block;
}

.neuro-cc-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: var(--space-1);
}

.neuro-cc-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
  margin-bottom: var(--space-2);
}

/* ---- SENSES ---- */
.neuro-sgrid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 12px;
  margin: var(--space-4) 0;
}

.neuro-scard {
  background: var(--color-surface);
  border-radius: var(--radius-md, 12px);
  padding: var(--space-4);
  text-align: center;
  border: 2px solid var(--color-border);
  transition: all 0.3s;
  cursor: pointer;
}

.neuro-scard:hover {
  transform: translateY(-3px);
  border-color: #9c6ade;
}

.neuro-s-emoji {
  font-size: 2.5rem;
  display: block;
  margin-bottom: var(--space-2);
}

.neuro-s-name {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: var(--space-1);
}

.neuro-s-info {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.4;
}

/* ---- EMOTION & PLASTICITY CARDS ---- */
.neuro-emotion-brain-part {
  font-size: 0.75rem;
  font-weight: 600;
  color: #9c6ade;
  background: rgba(156, 106, 222, 0.08);
  padding: 3px 10px;
  border-radius: 12px;
  display: inline-block;
  margin-bottom: var(--space-2);
}

.neuro-emotion-card:hover {
  border-color: #c084fc;
}

.neuro-plasticity-card:hover {
  border-color: #4caf50;
}

/* ---- GAMES ---- */
.neuro-game-tabs {
  display: flex;
  gap: 7px;
  justify-content: center;
  margin-bottom: var(--space-4);
}

.neuro-game-tab {
  padding: 7px 16px;
  border-radius: 18px;
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  color: var(--color-text-muted);
  font-weight: 700;
  font-size: var(--text-sm);
  cursor: pointer;
  transition: all 0.2s;
}

.neuro-game-tab:hover {
  border-color: #9c6ade;
}

.neuro-game-tab.active {
  background: #9c6ade;
  border-color: #9c6ade;
  color: #fff;
}

/* Game panel visibility */
.neuro-gp {
  display: none;
}

.neuro-gp.active {
  display: block;
  animation: neuro-fadeIn 0.3s;
}

/* Game header */
.neuro-ghdr {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--color-surface);
  border-radius: var(--radius-md, 12px);
  padding: 11px 18px;
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
  gap: var(--space-2);
  border: 1px solid var(--color-border);
}

.neuro-gi {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
}

.neuro-gv {
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: #ffd700;
  font-weight: 700;
}

.neuro-gbtn {
  padding: 7px 16px;
  border-radius: 18px;
  border: none;
  background: #e94560;
  color: #fff;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
}

.neuro-gbtn:hover {
  transform: scale(1.06);
}

/* ---- Reaction Game ---- */
.neuro-rbox {
  background: var(--color-surface);
  border-radius: var(--radius-lg, 16px);
  padding: 36px 26px;
  text-align: center;
  border: 2px solid var(--color-border);
  min-height: 280px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s;
  user-select: none;
  max-width: 560px;
  margin: 0 auto;
}

.neuro-rbox.waiting {
  background: linear-gradient(135deg, var(--color-surface), rgba(233, 69, 96, 0.05));
  border-color: #e94560;
}

.neuro-rbox.ready {
  background: linear-gradient(135deg, var(--color-surface), rgba(76, 175, 80, 0.08));
  border-color: #4caf50;
}

.neuro-rbox.too-early {
  background: linear-gradient(135deg, var(--color-surface), rgba(244, 67, 54, 0.08));
  border-color: #f44336;
}

.neuro-r-emoji {
  font-size: 3.5rem;
  margin-bottom: 12px;
  display: block;
}

.neuro-r-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: 6px;
}

.neuro-r-desc {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: 1.5;
}

.neuro-r-time {
  font-family: var(--font-display);
  font-size: 2.8rem;
  color: #ffd700;
  font-weight: 700;
  margin: var(--space-2) 0;
}

.neuro-r-rating {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.neuro-btimes {
  display: flex;
  gap: 7px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: var(--space-3);
}

.neuro-bt-chip {
  padding: 5px 12px;
  border-radius: 10px;
  font-size: var(--text-sm);
  font-weight: 700;
  background: var(--color-surface-2);
}

.neuro-activity-card.completed {
  border-color: #4caf50;
  background: rgba(76, 175, 80, 0.04);
}

/* ---- Memory Game ---- */
.neuro-mem-board {
  display: grid;
  gap: 8px;
  margin: 0 auto;
}

.neuro-mem-card {
  aspect-ratio: 1;
  border-radius: var(--radius-md, 12px);
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  transition: all 0.3s;
  user-select: none;
}

.neuro-mem-card:hover:not(.flipped):not(.matched) {
  border-color: #9c6ade;
  transform: scale(1.04);
}

.neuro-mem-card.flipped {
  background: var(--color-surface-2);
  border-color: #9c6ade;
}

.neuro-mem-card.matched {
  background: rgba(76, 175, 80, 0.12);
  border-color: #4caf50;
  opacity: 0.75;
}

.neuro-mem-card:not(.flipped):not(.matched) {
  font-size: 1.2rem;
  color: #9c6ade;
}

/* ---- Sequence Game ---- */
.neuro-seq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  max-width: 300px;
  margin: 0 auto;
}

.neuro-seq-btn {
  aspect-ratio: 1;
  border-radius: var(--radius-lg, 16px);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.2rem;
  transition: all 0.15s;
  user-select: none;
  border: 2px solid var(--color-border);
  background: var(--color-surface);
}

.neuro-seq-btn.flash {
  filter: brightness(1.6);
  transform: scale(1.08);
}

/* ---- QUIZ ---- */
.neuro-qwrap {
  max-width: 680px;
  margin: 0 auto;
}

.neuro-qdots {
  display: flex;
  gap: 5px;
  justify-content: center;
  margin-bottom: var(--space-5);
}

.neuro-qdot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-surface-2);
  transition: all 0.3s;
}

.neuro-qdot.cur {
  background: #e94560;
  transform: scale(1.3);
}

.neuro-qdot.right {
  background: #4caf50;
}

.neuro-qdot.wrong {
  background: #f44336;
}

.neuro-qcard {
  background: var(--color-surface);
  border-radius: var(--radius-lg, 16px);
  padding: var(--space-5);
  text-align: center;
  border: 2px solid var(--color-border);
}

.neuro-qnum {
  font-size: 0.76rem;
  color: #e94560;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: var(--space-2);
}

.neuro-qimg {
  font-size: 3.2rem;
  margin-bottom: var(--space-2);
  display: block;
}

.neuro-qq {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-1);
  line-height: 1.4;
}

.neuro-qhint {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  margin-bottom: var(--space-4);
}

.neuro-qopts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: var(--space-4);
}

.neuro-qopt {
  padding: 12px 15px;
  border-radius: var(--radius-md, 12px);
  background: var(--color-surface-2);
  border: 2px solid var(--color-border);
  cursor: pointer;
  font-weight: 700;
  font-size: var(--text-sm);
  transition: all 0.25s;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-align: left;
}

.neuro-qopt:hover:not(.dis) {
  border-color: #e94560;
  background: rgba(233, 69, 96, 0.06);
  transform: scale(1.02);
}

.neuro-qopt.ok {
  border-color: #4caf50 !important;
  background: rgba(76, 175, 80, 0.12) !important;
}

.neuro-qopt.no {
  border-color: #f44336 !important;
  background: rgba(244, 67, 54, 0.12) !important;
}

.neuro-qopt.show-ok {
  border-color: #4caf50 !important;
  background: rgba(76, 175, 80, 0.08) !important;
}

.neuro-qopt.dis {
  cursor: default;
  opacity: 0.7;
}

.neuro-qopt .neuro-ol {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.76rem;
  flex-shrink: 0;
}

.neuro-qexpl {
  background: var(--color-surface-2);
  border-radius: var(--radius-md, 12px);
  padding: 12px 15px;
  font-size: var(--text-sm);
  line-height: 1.55;
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
  display: none;
}

.neuro-qexpl.show {
  display: block;
  animation: neuro-fadeIn 0.3s;
}

.neuro-qnext {
  padding: 10px 28px;
  border-radius: var(--radius-full, 50px);
  border: none;
  background: #e94560;
  color: #fff;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
  display: none;
}

.neuro-qnext.show {
  display: inline-block;
  animation: neuro-fadeIn 0.3s;
}

.neuro-qnext:hover {
  transform: scale(1.06);
  filter: brightness(1.1);
}

/* ---- RESULTS ---- */
.neuro-res-card {
  text-align: center;
  background: var(--color-surface);
  border-radius: var(--radius-lg, 16px);
  padding: 34px 26px;
  border: 2px solid var(--color-border);
}

.neuro-res-big {
  font-size: 3.5rem;
  margin-bottom: var(--space-2);
  display: block;
}

.neuro-res-title {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.neuro-res-score {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.neuro-res-score span {
  color: #ffd700;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
}

.neuro-res-badges {
  display: flex;
  gap: 9px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-5);
}

.neuro-badge {
  padding: 6px 14px;
  border-radius: var(--radius-lg, 16px);
  font-size: var(--text-sm);
  font-weight: 700;
}

.neuro-badge.gold {
  background: rgba(255, 215, 0, 0.12);
  color: #ffd700;
  border: 2px solid rgba(255, 215, 0, 0.25);
}

.neuro-badge.silver {
  background: rgba(192, 192, 192, 0.08);
  color: #bbb;
  border: 2px solid rgba(192, 192, 192, 0.15);
}

/* ---- RESPONSIVE ---- */
@media (max-width: 600px) {
  .neuro-card-grid {
    grid-template-columns: 1fr;
  }

  .neuro-cgrid {
    grid-template-columns: 1fr;
  }

  .neuro-sgrid {
    grid-template-columns: 1fr 1fr;
  }

  .neuro-brain-layout {
    flex-direction: column;
    align-items: center;
  }

  .neuro-brain-svg-wrap {
    width: 260px;
  }

  .neuro-info-panel {
    min-width: 0;
    max-width: 100%;
  }

  .neuro-qopts {
    grid-template-columns: 1fr;
  }

  .neuro-inner-btn {
    padding: 7px 11px;
    font-size: 0.74rem;
  }

  .neuro-lvl-btn {
    padding: 8px 14px;
    font-size: 0.78rem;
  }

  .neuro-section-title {
    font-size: var(--text-lg);
  }
}

/* Section headings */
.neuro-section-heading {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 800;
  color: var(--color-text);
  margin-top: var(--space-5);
  margin-bottom: var(--space-1);
}

/* Quiz tier picker — Circuit Lab card style */
.neuro-quiz-tier-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-4);
}
.neuro-quiz-tier-card {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  background: var(--color-surface, #fff);
  border: 2px solid var(--color-border, #e2e8f0);
  border-radius: var(--radius-lg, 16px);
  padding: var(--space-4);
  cursor: pointer;
  transition: all 0.2s;
  position: relative;
}
.neuro-quiz-tier-card:hover {
  border-color: #9c6ade;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(156, 106, 222, 0.15);
}
.neuro-quiz-tier-icon {
  font-size: 2.2rem;
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.neuro-quiz-tier-info { flex: 1; min-width: 0; }
.neuro-quiz-tier-name {
  font-weight: 700;
  font-size: var(--text-base);
  color: var(--color-text);
}
.neuro-quiz-tier-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted, #64748b);
  margin-top: 2px;
}
.neuro-quiz-tier-stat {
  display: block;
  font-size: var(--text-xs, 0.75rem);
  color: #9c6ade;
  font-weight: 600;
  margin-top: 4px;
}
.neuro-quiz-tier-badge {
  font-size: 0.65rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 8px;
  background: rgba(156, 106, 222, 0.15);
  color: #9c6ade;
  letter-spacing: 0.5px;
  flex-shrink: 0;
}