/* ==========================================================
   Math & Reasoning Olympiad Adventure — Premium Kids Styles
   ========================================================== */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

:root {
  --font-main: 'Fredoka', 'Quicksand', -apple-system, sans-serif;
  --bg-gradient: linear-gradient(180deg, #7dd3fc 0%, #c4b5fd 40%, #fef3c7 100%);
  --amber: #f59e0b;
  --amber-dark: #d97706;
  --orange: #f97316;
  --green: #10b981;
  --green-dark: #059669;
  --blue: #0284c7;
  --blue-dark: #0369a1;
  --purple: #8b5cf6;
  --pink: #ec4899;
  --card-bg: rgba(255, 255, 255, 0.95);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
}

body {
  font-family: var(--font-main);
  background: var(--bg-gradient);
  color: #1e293b;
  min-height: 100vh;
  min-height: 100dvh;
  overflow-x: hidden;
  user-select: none;
  -webkit-user-select: none;
  display: flex;
  flex-direction: column;
  align-items: center;
}

button {
  font-family: inherit;
  border: none;
  outline: none;
  cursor: pointer;
  touch-action: manipulation;
}

/* Screen Transitions */
.screen {
  display: none;
  width: 100%;
  max-width: 900px;
  padding: 16px;
  margin: 0 auto;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  animation: popIn 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.screen.screen-active {
  display: flex;
}

/* Animations */
@keyframes bounceGentle {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-7px); }
}

@keyframes pulseSubtle {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.04); }
}

@keyframes wiggle {
  0%, 100% { transform: rotate(-3deg); }
  50% { transform: rotate(3deg); }
}

@keyframes popIn {
  0% { transform: scale(0.92); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}

.animate-bounce { animation: bounceGentle 2s ease-in-out infinite; }
.animate-pulse { animation: pulseSubtle 2s ease-in-out infinite; }
.animate-wiggle { animation: wiggle 0.6s ease-in-out infinite; }

/* Top Header Bar */
.game-header {
  width: 100%;
  max-width: 900px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  z-index: 20;
}

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

.btn-arcade-exit {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-md);
  background: white;
  border: 2px solid #e2e8f0;
  box-shadow: 0 4px 0 #cbd5e1;
  color: #334155;
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 800;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
  white-space: nowrap;
}

.btn-arcade-exit:hover {
  background: #f8fafc;
  border-color: #cbd5e1;
  color: #0f172a;
  transform: translateY(-1px);
  box-shadow: 0 5px 0 #94a3b8;
}

.btn-arcade-exit:active {
  transform: translateY(3px);
  box-shadow: 0 1px 0 #cbd5e1;
}

.btn-arcade-exit .exit-icon {
  font-size: 1.15rem;
}

.btn-back {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: white;
  border: 2px solid #fde68a;
  box-shadow: 0 4px 0 #fcd34d;
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.15s;
}

.btn-back:active {
  transform: translateY(3px);
  box-shadow: none;
}

.header-titles h2 {
  font-size: 1.25rem;
  font-weight: 800;
  color: #0f172a;
  line-height: 1.2;
}

.header-titles p {
  font-size: 0.8rem;
  font-weight: 600;
  color: #78350f;
}

.header-stats {
  display: flex;
  align-items: center;
  gap: 8px;
}

.stat-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: var(--radius-md);
  font-weight: 800;
  font-size: 0.85rem;
  box-shadow: 0 2px 4px rgba(0,0,0,0.04);
}

.stat-chip.stars { background: #fef3c7; border: 2px solid #fde68a; color: #92400e; }
.stat-chip.gems { background: #cffafe; border: 2px solid #a5f3fc; color: #155e75; }
.stat-chip.streak { background: #ffedd5; border: 2px solid #fed7aa; color: #9a3412; }

.header-audio-controls {
  display: flex;
  align-items: center;
  background: white;
  border: 2px solid #fde68a;
  border-radius: var(--radius-md);
  padding: 2px;
  gap: 2px;
}

.btn-icon-toggle {
  background: transparent;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: #64748b;
  transition: background 0.15s;
}

.btn-icon-toggle.active {
  background: #fef3c7;
  color: #d97706;
}

/* Hero Section */
.hero-card {
  position: relative;
  width: 100%;
  background: linear-gradient(135deg, #f59e0b 0%, #ea580c 60%, #ec4899 100%);
  border: 4px solid white;
  border-radius: var(--radius-xl);
  padding: 28px 24px;
  color: white;
  box-shadow: 0 12px 30px rgba(234, 88, 12, 0.25);
  display: flex;
  flex-direction: column;
  gap: 16px;
  overflow: hidden;
}

@media (min-width: 640px) {
  .hero-card {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(4px);
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.hero-card h1 {
  font-size: 2.2rem;
  font-weight: 900;
  line-height: 1.1;
  margin-top: 6px;
  text-shadow: 0 2px 4px rgba(0,0,0,0.15);
}

.hero-card p {
  font-size: 1rem;
  font-weight: 600;
  opacity: 0.95;
  margin-top: 4px;
  max-width: 440px;
}

/* Mascot Component */
.mascot-box {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
}

.mascot-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, #38bdf8, #2563eb);
  border: 4px solid white;
  box-shadow: 0 6px 16px rgba(0,0,0,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
  flex-shrink: 0;
  transition: transform 0.2s;
}

.mascot-avatar:hover { transform: scale(1.08); }

.mascot-bubble {
  background: white;
  border: 2px solid #fde68a;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  border-radius: var(--radius-lg);
  border-top-left-radius: 4px;
  padding: 10px 14px;
  font-size: 0.95rem;
  font-weight: 700;
  color: #1e293b;
  position: relative;
  max-width: 320px;
}

/* Progress Overview Ribbon */
.overview-grid {
  width: 100%;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

@media (min-width: 640px) {
  .overview-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.overview-card {
  background: var(--card-bg);
  border: 2px solid #fde68a;
  border-radius: var(--radius-lg);
  padding: 14px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.04);
}

.overview-icon {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: #fef3c7;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
}

.overview-info span {
  font-size: 0.7rem;
  font-weight: 800;
  text-transform: uppercase;
  color: #94a3b8;
  display: block;
}

.overview-info strong {
  font-size: 1.2rem;
  font-weight: 900;
  color: #1e293b;
}

/* Main Grade Selectors */
.grade-launcher {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

@media (min-width: 640px) {
  .grade-launcher {
    flex-direction: row;
  }
}

.btn-grade {
  flex: 1;
  padding: 22px;
  border-radius: var(--radius-xl);
  border: 4px solid white;
  box-shadow: 0 8px 20px rgba(0,0,0,0.12);
  text-align: left;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 12px;
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn-grade:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 28px rgba(0,0,0,0.16);
}

.btn-grade:active {
  transform: translateY(2px);
}

.btn-grade.lkg {
  background: linear-gradient(135deg, #fcd34d 0%, #fb923c 100%);
  color: #451a03;
}

.btn-grade.class1 {
  background: linear-gradient(135deg, #38bdf8 0%, #6366f1 100%);
  color: white;
}

.grade-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.grade-age {
  background: rgba(255,255,255,0.3);
  backdrop-filter: blur(4px);
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
}

.grade-emoji { font-size: 2.2rem; }

.btn-grade h2 {
  font-size: 1.8rem;
  font-weight: 900;
  line-height: 1.1;
}

.btn-grade p {
  font-size: 0.85rem;
  font-weight: 600;
  opacity: 0.9;
  line-height: 1.3;
}

.grade-cta {
  align-self: flex-start;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.4);
  font-weight: 800;
  font-size: 0.85rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* Modes Grid */
.modes-section {
  width: 100%;
}

.modes-section h3 {
  font-size: 1.1rem;
  font-weight: 900;
  color: #334155;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.modes-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

@media (min-width: 640px) {
  .modes-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.mode-btn {
  background: white;
  border: 2px solid #e2e8f0;
  border-radius: var(--radius-lg);
  padding: 16px;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.04);
  transition: transform 0.2s, border-color 0.2s;
}

.mode-btn:hover {
  transform: translateY(-3px);
  border-color: #f59e0b;
}

.mode-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: #fef3c7;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.mode-btn h4 {
  font-size: 0.95rem;
  font-weight: 800;
  color: #0f172a;
}

.mode-btn p {
  font-size: 0.75rem;
  font-weight: 600;
  color: #64748b;
}

/* Home Footer */
.home-footer-row {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.4);
  flex-wrap: wrap;
  gap: 12px;
}

.btn-arcade-exit-bottom {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-md);
  background: white;
  border: 2px solid #e2e8f0;
  box-shadow: 0 4px 0 #cbd5e1;
  color: #334155;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 800;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-arcade-exit-bottom:hover {
  background: #f8fafc;
  border-color: #cbd5e1;
  color: #0f172a;
  transform: translateY(-1px);
  box-shadow: 0 5px 0 #94a3b8;
}

.btn-arcade-exit-bottom:active {
  transform: translateY(3px);
  box-shadow: 0 1px 0 #cbd5e1;
}

/* Worlds Map Screen */
.worlds-container {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.world-card {
  width: 100%;
  border-radius: var(--radius-xl);
  border: 4px solid white;
  padding: 20px;
  color: white;
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: transform 0.2s;
}

.world-card.locked {
  background: #cbd5e1 !important;
  opacity: 0.75;
}

.world-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.world-title-group {
  display: flex;
  align-items: center;
  gap: 14px;
}

.world-emoji {
  width: 58px;
  height: 58px;
  border-radius: 20px;
  background: rgba(255,255,255,0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  flex-shrink: 0;
}

.world-titles h3 {
  font-size: 1.4rem;
  font-weight: 900;
  line-height: 1.1;
}

.world-titles p {
  font-size: 0.85rem;
  font-weight: 600;
  opacity: 0.95;
}

.world-stars-badge {
  background: rgba(0,0,0,0.2);
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 4px;
}

.levels-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-top: 12px;
  border-top: 1px solid rgba(255,255,255,0.25);
  overflow-x: auto;
}

.btn-level-pin {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  background: white;
  color: #1e293b;
  font-weight: 900;
  font-size: 1.1rem;
  box-shadow: 0 4px 0 rgba(0,0,0,0.15);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform 0.15s;
}

.btn-level-pin:hover:not(:disabled) {
  transform: scale(1.1);
}

.btn-level-pin:active:not(:disabled) {
  transform: translateY(3px);
  box-shadow: none;
}

.btn-level-pin:disabled {
  background: rgba(255,255,255,0.4);
  color: rgba(255,255,255,0.6);
  cursor: not-allowed;
  box-shadow: none;
}

.pin-stars {
  font-size: 8px;
  margin-top: 2px;
  letter-spacing: 1px;
}

/* Active Game Question Screen */
.game-play-card {
  width: 100%;
  max-width: 680px;
  background: var(--card-bg);
  border: 4px solid #fde68a;
  border-radius: 36px;
  padding: 24px;
  box-shadow: 0 16px 36px rgba(245, 158, 11, 0.15);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.question-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.question-text {
  font-size: 1.4rem;
  font-weight: 900;
  color: #0f172a;
  line-height: 1.25;
  flex: 1;
}

.question-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.btn-speak {
  width: 48px;
  height: 48px;
  border-radius: 16px;
  background: #fef3c7;
  border: 2px solid #fde68a;
  box-shadow: 0 4px 0 #fcd34d;
  font-size: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  cursor: pointer;
  transition: transform 0.15s, background 0.15s, box-shadow 0.15s;
}

.btn-speak:active {
  transform: translateY(3px);
  box-shadow: none;
}

.btn-game-mute {
  width: 48px;
  height: 48px;
  border-radius: 16px;
  background: white;
  border: 2px solid #cbd5e1;
  box-shadow: 0 4px 0 #94a3b8;
  font-size: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  cursor: pointer;
  transition: transform 0.15s, background 0.15s, border-color 0.15s, box-shadow 0.15s;
}

.btn-game-mute:hover {
  background: #f8fafc;
  border-color: #94a3b8;
}

.btn-game-mute:active {
  transform: translateY(3px);
  box-shadow: 0 1px 0 #94a3b8;
}

.btn-game-mute.muted {
  background: #fef2f2;
  border-color: #fca5a5;
  box-shadow: 0 4px 0 #ef4444;
  color: #dc2626;
}

.visual-arena {
  width: 100%;
  background: #fffbeb;
  border: 2px dashed #fde68a;
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 110px;
  gap: 12px;
}

.visual-items-wrap {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 12px;
}

.visual-tap-item {
  position: relative;
  font-size: 2.5rem;
  padding: 8px 12px;
  border-radius: 16px;
  background: transparent;
  cursor: pointer;
  transition: transform 0.15s;
}

.visual-tap-item:active { transform: scale(0.9); }

.visual-tap-item.tapped {
  background: #fef08a;
  transform: scale(1.1);
  box-shadow: 0 4px 10px rgba(0,0,0,0.08);
}

.visual-tap-item .tap-badge {
  position: absolute;
  top: -6px;
  right: -6px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #d97706;
  color: white;
  font-size: 11px;
  font-weight: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid white;
}

.visual-card-pill {
  padding: 10px 18px;
  background: white;
  border: 2px solid #fde68a;
  border-radius: var(--radius-md);
  box-shadow: 0 3px 6px rgba(0,0,0,0.04);
  font-size: 1.6rem;
  font-weight: 900;
  color: #1e293b;
}

/* Answers Grid */
.answers-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  width: 100%;
}

.btn-answer {
  flex: 0 0 calc(50% - 5px);
  width: calc(50% - 5px);
  max-width: calc(50% - 5px);
  min-height: 52px;
  box-sizing: border-box;
  padding: 12px 14px;
  border-radius: var(--radius-lg);
  font-size: 1.15rem;
  font-weight: 900;
  display: flex;
  align-items: center;
  gap: 10px;
  text-align: left;
  transition: transform 0.15s, box-shadow 0.15s;
  border: 2px solid transparent;
}

.btn-answer:active:not(:disabled) {
  transform: translateY(3px);
  box-shadow: none !important;
}

.btn-answer .opt-letter {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  font-weight: 900;
  flex-shrink: 0;
}

.btn-answer.opt-0 {
  background: #fef3c7;
  border-color: #f59e0b;
  color: #78350f;
  box-shadow: 0 5px 0 #d97706;
}
.btn-answer.opt-0 .opt-letter { background: #fde68a; color: #92400e; }

.btn-answer.opt-1 {
  background: #e0f2fe;
  border-color: #0ea5e9;
  color: #0369a1;
  box-shadow: 0 5px 0 #0284c7;
}
.btn-answer.opt-1 .opt-letter { background: #bae6fd; color: #075985; }

.btn-answer.opt-2 {
  background: #dcfce7;
  border-color: #10b981;
  color: #065f46;
  box-shadow: 0 5px 0 #059669;
}
.btn-answer.opt-2 .opt-letter { background: #bbf7d0; color: #047857; }

.btn-answer.opt-3 {
  background: #f3e8ff;
  border-color: #a855f7;
  color: #6b21a8;
  box-shadow: 0 5px 0 #7c3aed;
}
.btn-answer.opt-3 .opt-letter { background: #e9d5ff; color: #581c87; }

.btn-answer.correct {
  background: #10b981 !important;
  color: white !important;
  box-shadow: 0 5px 0 #047857 !important;
}
.btn-answer.correct .opt-letter { background: white !important; color: #047857 !important; }

.btn-answer.wrong {
  background: #fed7aa !important;
  color: #9a3412 !important;
  box-shadow: 0 3px 0 #c2410c !important;
  opacity: 0.9;
}

/* Feedback Card */
.feedback-box {
  padding: 12px 18px;
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  animation: popIn 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.feedback-box.correct {
  background: #ecfdf5;
  border: 2px solid #a7f3d0;
  color: #065f46;
}

.feedback-box.wrong {
  background: #fffbeb;
  border: 2px solid #fde68a;
  color: #92400e;
}

.feedback-top {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
  min-width: 0;
}

.feedback-icon { font-size: 26px; flex-shrink: 0; }

.feedback-msg {
  min-width: 0;
}

.feedback-msg h4 {
  font-size: 1.1rem;
  font-weight: 900;
  margin: 0;
}

.feedback-msg p {
  font-size: 0.88rem;
  font-weight: 600;
  margin-top: 2px;
  line-height: 1.35;
}

.btn-next-q {
  align-self: center;
  padding: 11px 22px;
  background: linear-gradient(135deg, #f59e0b, #ea580c);
  color: white;
  border-radius: var(--radius-md);
  font-weight: 900;
  font-size: 1.02rem;
  box-shadow: 0 4px 0 #d97706;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  flex-shrink: 0;
  transition: transform 0.15s;
}

.btn-next-q:active {
  transform: translateY(3px);
  box-shadow: none;
}

/* Progress bar inside gameplay */
.progress-container {
  width: 100%;
  max-width: 680px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.progress-track {
  flex: 1;
  height: 14px;
  background: rgba(255,255,255,0.75);
  border: 2px solid #fde68a;
  border-radius: 999px;
  overflow: hidden;
  padding: 2px;
}

.progress-fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, #f59e0b, #ec4899);
  transition: width 0.3s ease;
}

.btn-hint {
  padding: 8px 16px;
  background: #fef3c7;
  border: 2px solid #fde68a;
  box-shadow: 0 3px 0 #fcd34d;
  border-radius: var(--radius-md);
  font-weight: 900;
  font-size: 0.85rem;
  color: #78350f;
  display: flex;
  align-items: center;
  gap: 6px;
}

.btn-hint:active {
  transform: translateY(2px);
  box-shadow: none;
}

/* Modal Windows */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  z-index: 100;
  animation: popIn 0.25s forwards;
}

.modal-dialog {
  width: 100%;
  max-width: 440px;
  background: white;
  border-radius: 36px;
  border: 4px solid #fde68a;
  box-shadow: 0 20px 40px rgba(0,0,0,0.25);
  padding: 28px 24px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  position: relative;
}

.btn-close-modal {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: #f1f5f9;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #475569;
}

/* Printable Certificate Frame */
.certificate-frame {
  width: 100%;
  background: linear-gradient(135deg, #fffbeb, #ffffff, #fff7ed);
  border: 8px double #d97706;
  border-radius: 24px;
  padding: 28px 20px;
  text-align: center;
  position: relative;
}

.cert-title {
  font-size: 1.8rem;
  font-weight: 900;
  color: #1e293b;
  margin-top: 4px;
}

.cert-name {
  font-size: 2rem;
  font-weight: 900;
  color: #d97706;
  text-decoration: underline;
  text-underline-offset: 6px;
  margin: 12px 0;
}

.cert-stats {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin: 16px 0;
  padding: 10px;
  background: white;
  border: 2px solid #fde68a;
  border-radius: 16px;
}

/* Print Styles */
@media print {
  body { background: white !important; }
  body * { visibility: hidden !important; }
  #certificate-print-zone, #certificate-print-zone * { visibility: visible !important; }
  #certificate-print-zone {
    position: fixed;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 90vw;
    max-width: 800px;
    box-shadow: none !important;
  }
}

/* Exit Button & Header Mobile Queries */
@media (max-width: 580px) {
  .btn-arcade-exit {
    padding: 8px 10px;
  }
  .btn-arcade-exit .exit-text {
    display: none;
  }
  .header-stats .stat-chip.gems,
  .header-stats .stat-chip.streak {
    display: none;
  }
  .home-footer-row {
    flex-direction: column;
    align-items: stretch;
    text-align: center;
  }
  .btn-arcade-exit-bottom {
    justify-content: center;
  }
}

/* Mobile and Height-Constrained Gameplay: Zero-Scroll Experience */
@media (max-width: 640px), (max-height: 850px) {
  #screen-game {
    padding: 6px 10px;
    gap: 6px;
  }
  #screen-game .mascot-box {
    display: none !important;
  }
  #screen-game .progress-container {
    padding: 2px 0;
  }
  .game-play-card {
    padding: 10px 14px;
    gap: 8px;
    border-radius: 20px;
    border-width: 3px;
  }
  .question-top {
    gap: 8px;
  }
  .question-text {
    font-size: 1.05rem;
    line-height: 1.2;
  }
  .question-actions {
    gap: 6px;
  }
  .btn-speak,
  .btn-game-mute {
    width: 36px;
    height: 36px;
    font-size: 18px;
    border-radius: 10px;
  }
  .visual-arena {
    padding: 6px 10px;
    min-height: 52px;
    gap: 6px;
    border-radius: var(--radius-md);
  }
  .visual-items-wrap {
    gap: 6px;
  }
  .visual-tap-item {
    font-size: 1.7rem;
    padding: 2px 6px;
    border-radius: 10px;
  }
  .visual-card-pill {
    padding: 4px 10px;
    font-size: 1.15rem;
  }
  .answers-grid {
    gap: 6px;
  }
  .btn-answer {
    flex: 0 0 calc(50% - 3px);
    width: calc(50% - 3px);
    max-width: calc(50% - 3px);
    padding: 8px 10px;
    font-size: 0.98rem;
    gap: 8px;
    border-radius: 12px;
    min-height: 46px;
    box-sizing: border-box;
  }
  .btn-answer .opt-letter {
    width: 26px;
    height: 26px;
    font-size: 0.8rem;
    border-radius: 8px;
  }
  .feedback-box {
    padding: 8px 12px;
    flex-direction: row !important;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    border-radius: 14px;
  }
  .feedback-top {
    align-items: center;
    gap: 8px;
    flex: 1;
    min-width: 0;
  }
  .feedback-icon {
    font-size: 22px;
  }
  .feedback-msg h4 {
    font-size: 0.92rem;
    line-height: 1.2;
    margin: 0;
  }
  .feedback-msg p {
    font-size: 0.78rem;
    line-height: 1.2;
    margin-top: 2px;
  }
  .btn-next-q {
    padding: 9px 16px;
    font-size: 0.92rem;
    white-space: nowrap;
    flex-shrink: 0;
    align-self: center;
    border-radius: 10px;
  }
}

@media (max-width: 380px) {
  .btn-answer {
    font-size: 0.88rem;
    padding: 6px 8px;
  }
  .feedback-box {
    padding: 6px 8px;
    gap: 6px;
  }
  .btn-next-q {
    padding: 8px 12px;
    font-size: 0.85rem;
  }
}