/* Circle Quest Styling - Mobile-first and Responsive */

:root {
  /* Colors */
  --color-primary: #4F46E5;
  --color-primary-hover: #4338CA;
  --color-primary-light: #EEF2FF;
  --color-secondary: #0EA5E9;
  --color-accent: #F59E0B;
  --color-star: #F59E0B;
  --color-star-empty: #CBD5E1;
  --color-success: #10B981;
  --color-danger: #EF4444;
  --color-bg: #F8FAFC;
  --color-card-bg: #FFFFFF;
  --color-text: #1E293B;
  --color-text-muted: #64748B;
  --color-border: #E2E8F0;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-size-sm: 16px;  /* Minimum 16px requirement */
  --font-size-base: 18px;
  --font-size-lg: 22px;
  --font-size-xl: 28px;
  --font-size-title: 36px;

  /* Spacing */
  --spacing-xs: 8px;
  --spacing-sm: 12px;
  --spacing-md: 20px;
  --spacing-lg: 32px;
  --spacing-xl: 48px;

  /* Border Radius */
  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 24px;
  --radius-pill: 9999px;

  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -2px rgba(15, 23, 42, 0.04);
  --shadow-hover: 0 20px 25px -5px rgba(15, 23, 42, 0.12), 0 10px 10px -5px rgba(15, 23, 42, 0.06);

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset and Base Styles */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

#app-container {
  width: 100%;
  max-width: 800px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding: var(--spacing-sm);
}

/* Header Styles */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--color-card-bg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--spacing-md);
  border: 2px solid var(--color-border);
}

.total-stars-badge {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  background-color: #FEF3C7;
  color: #92400E;
  font-weight: 700;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-pill);
  font-size: var(--font-size-base);
  border: 2px solid #FCD34D;
}

.star-icon {
  color: var(--color-star);
  font-size: 1.2em;
}

/* Button Styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  font-family: inherit;
  font-size: var(--font-size-base);
  font-weight: 600;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-pill);
  border: none;
  cursor: pointer;
  touch-action: manipulation;
  transition: transform var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast);
  user-select: none;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background-color: var(--color-primary);
  color: #FFFFFF;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
}

.btn-secondary {
  background-color: #E2E8F0;
  color: var(--color-text);
}

.btn-secondary:hover {
  background-color: #CBD5E1;
}

.btn-danger {
  background-color: #FEE2E2;
  color: var(--color-danger);
  border: 1px solid #FCA5A5;
}

.btn-danger:hover {
  background-color: #FCA5A5;
  color: #FFFFFF;
}

/* Home Screen Layout */
.home-screen {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  animation: fadeIn var(--transition-normal);
}

.hero-banner {
  text-align: center;
  padding: var(--spacing-md) var(--spacing-sm);
  background: linear-gradient(135deg, #EEF2FF 0%, #E0E7FF 100%);
  border-radius: var(--radius-lg);
  border: 2px solid #C7D2FE;
}

.app-title {
  font-size: var(--font-size-title);
  color: var(--color-primary);
  font-weight: 800;
  margin-bottom: var(--spacing-xs);
  letter-spacing: -0.5px;
}

.app-tagline {
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
  max-width: 500px;
  margin: 0 auto;
}

/* Team Input Section */
.team-section {
  background-color: var(--color-card-bg);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 2px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.team-section label {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-text);
}

.team-input-wrapper {
  display: flex;
  gap: var(--spacing-xs);
}

.team-input {
  flex: 1;
  font-size: var(--font-size-base);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-sm);
  border: 2px solid var(--color-border);
  outline: none;
  transition: border-color var(--transition-fast);
}

.team-input:focus {
  border-color: var(--color-primary);
}

/* Well Done Screen Banner */
.well-done-card {
  background: linear-gradient(135deg, #D1FAE5 0%, #A7F3D0 100%);
  border: 3px solid #34D399;
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg) var(--spacing-md);
  text-align: center;
  box-shadow: var(--shadow-md);
  animation: popIn 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.well-done-card h2 {
  font-size: var(--font-size-xl);
  color: #065F46;
  margin-bottom: var(--spacing-xs);
}

.well-done-card p {
  font-size: var(--font-size-base);
  color: #047857;
  margin-bottom: var(--spacing-xs);
}

/* Mission Grid & Cards */
.missions-header-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-top: var(--spacing-xs);
}

.missions-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
}

@media (min-width: 600px) {
  .missions-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.mission-card {
  background-color: var(--color-card-bg);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  border: 2px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--spacing-md);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.mission-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--color-primary);
}

.mission-card.completed {
  border-color: #34D399;
  background: linear-gradient(180deg, #FFFFFF 0%, #F0FDF4 100%);
}

.mission-card-header {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.mission-card-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text);
}

.mission-card-status {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  font-size: var(--font-size-sm);
  font-weight: 600;
  background-color: #F1F5F9;
  color: var(--color-text-muted);
}

.mission-card.completed .mission-card-status {
  background-color: #D1FAE5;
  color: #065F46;
}

.mission-stars-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: var(--spacing-xs);
}

.star {
  font-size: 24px;
  color: var(--color-star-empty);
  transition: color var(--transition-fast);
}

.star.filled {
  color: var(--color-star);
}

.mission-card-footer {
  display: flex;
  justify-content: flex-end;
}

/* Reset Button Area */
.reset-container {
  display: flex;
  justify-content: center;
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

/* Mission Container View */
.mission-view {
  background-color: var(--color-card-bg);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  border: 2px solid var(--color-border);
  box-shadow: var(--shadow-md);
  min-height: 400px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: var(--spacing-lg);
  animation: fadeIn var(--transition-normal);
}

.mission-view-title {
  font-size: var(--font-size-xl);
  color: var(--color-primary);
  font-weight: 800;
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes popIn {
  0% {
    opacity: 0;
    transform: scale(0.9);
  }
  70% {
    transform: scale(1.03);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

/* Mission 1 */

.m1-activity-wrapper {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  text-align: center;
}

.m1-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
}

.m1-step-badge {
  display: inline-block;
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: 700;
  font-size: var(--font-size-sm);
  padding: 4px var(--spacing-sm);
  border-radius: var(--radius-pill);
  border: 1px solid #C7D2FE;
}

.m1-title {
  font-size: var(--font-size-xl);
  color: var(--color-text);
  font-weight: 800;
}

.m1-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  max-width: 520px;
}

.m1-interactive-card {
  background-color: var(--color-card-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
}

.m1-svg-container {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  max-width: 320px;
  touch-action: none;
}

.m1-svg {
  display: block;
  max-width: 100%;
  height: auto;
  user-select: none;
}

.m1-svg-circle {
  fill: none;
  stroke: var(--color-primary);
  stroke-width: 3.5;
}

.m1-svg-diameter-line {
  stroke: #0EA5E9;
  stroke-width: 3;
  stroke-dasharray: 6 4;
}

.m1-svg-radius-line {
  stroke: #F59E0B;
  stroke-width: 4;
  stroke-linecap: round;
}

.m1-svg-centre-dot {
  fill: var(--color-text);
}

.m1-svg-handle-inner {
  fill: var(--color-primary);
  stroke: #FFFFFF;
  stroke-width: 3;
}

.m1-live-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  width: 100%;
  max-width: 400px;
}

.m1-info-badge {
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 600;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.m1-info-primary {
  background-color: #FEF3C7;
  color: #92400E;
  border: 1px solid #FCD34D;
}

.m1-sub-msg {
  font-size: 14px;
  font-weight: 500;
  color: #B45309;
}

.m1-info-secondary {
  background-color: #E0F2FE;
  color: #075985;
  border: 1px solid #7DD3FC;
}

.m1-controls {
  width: 100%;
  max-width: 400px;
}

.m1-slider-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  align-items: stretch;
}

.m1-label {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-text);
}

.m1-slider {
  width: 100%;
  height: 12px;
  border-radius: 6px;
  background: #E2E8F0;
  outline: none;
  cursor: pointer;
  accent-color: var(--color-primary);
  touch-action: manipulation;
}

.m1-task-checklist {
  display: flex;
  flex-direction: column;
  gap: 6px;
  align-items: flex-start;
  width: 100%;
  max-width: 400px;
  background-color: #F8FAFC;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  font-size: var(--font-size-sm);
}

.m1-check-item {
  color: var(--color-text-muted);
}

.m1-check-item.done {
  color: #065F46;
  font-weight: 600;
}

.m1-btn-large {
  min-height: 48px;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--font-size-base);
}

/* Mission 4 */

.m4-quiz-wrapper {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  align-items: center;
  text-align: center;
}

.m4-quiz-header {
  width: 100%;
  max-width: 520px;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.m4-progress-bar-container {
  width: 100%;
  height: 12px;
  background-color: #E2E8F0;
  border-radius: var(--radius-pill);
  overflow: hidden;
}

.m4-progress-bar-fill {
  height: 100%;
  background-color: var(--color-primary);
  width: 0%;
  transition: width var(--transition-normal);
}

.m4-meta-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-text-muted);
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

.m4-streak-badge {
  background-color: #FEF3C7;
  color: #92400E;
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid #FCD34D;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* Streak Celebration Popup */
.m4-streak-popup {
  position: fixed;
  top: 20%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: linear-gradient(135deg, #FEF08A 0%, #F59E0B 100%);
  color: #78350F;
  border: 3px solid #F59E0B;
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-lg);
  font-weight: 800;
  box-shadow: var(--shadow-hover);
  z-index: 1000;
  pointer-events: none;
  animation: m4PopFade 2s forwards cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes m4PopFade {
  0% {
    opacity: 0;
    transform: translate(-50%, -30%) scale(0.6);
  }
  20% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.1);
  }
  30% {
    transform: translate(-50%, -50%) scale(1);
  }
  75% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
  }
  100% {
    opacity: 0;
    transform: translate(-50%, -70%) scale(0.9);
  }
}

.m4-card {
  width: 100%;
  max-width: 520px;
  background-color: var(--color-card-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
}

.m4-question-title {
  font-size: var(--font-size-lg);
  color: var(--color-text);
  font-weight: 700;
  line-height: 1.4;
}

/* Options for Multiple Choice & True/False */
.m4-options-list {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.m4-option-btn {
  width: 100%;
  min-height: 48px;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-base);
  font-weight: 600;
  text-align: left;
  border-radius: var(--radius-md);
  border: 2px solid var(--color-border);
  background-color: #FFFFFF;
  color: var(--color-text);
  cursor: pointer;
  touch-action: manipulation;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.m4-option-btn:hover:not(:disabled) {
  border-color: var(--color-primary);
  background-color: var(--color-primary-light);
}

.m4-option-btn.selected {
  border-color: var(--color-primary);
  background-color: var(--color-primary-light);
  box-shadow: 0 0 0 2px var(--color-primary);
}

.m4-option-btn.correct {
  border-color: var(--color-success) !important;
  background-color: #D1FAE5 !important;
  color: #065F46 !important;
}

.m4-option-btn.wrong {
  border-color: var(--color-danger) !important;
  background-color: #FEE2E2 !important;
  color: #991B1B !important;
}

/* Number Input */
.m4-number-input-group {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  justify-content: center;
}

.m4-number-input {
  width: 120px;
  height: 48px;
  font-size: var(--font-size-lg);
  font-weight: 700;
  text-align: center;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color var(--transition-fast);
}

.m4-number-input:focus {
  border-color: var(--color-primary);
}

.m4-unit-label {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-text-muted);
}

/* Ordering Question Slots & Items */
.m4-ordering-container {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.m4-slots-list {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.m4-slot {
  width: 100%;
  min-height: 52px;
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-md);
  padding: 8px var(--spacing-sm);
  background-color: #F8FAFC;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-align: left;
}

.m4-slot.filled {
  border-style: solid;
  border-color: var(--color-primary);
  background-color: #FFFFFF;
}

.m4-slot-num {
  font-weight: 800;
  font-size: var(--font-size-base);
  color: var(--color-primary);
  min-width: 24px;
}

.m4-slot-text {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
  flex: 1;
}

.m4-unplaced-list {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.m4-order-item-btn {
  width: 100%;
  min-height: 48px;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-align: left;
  border-radius: var(--radius-md);
  border: 2px solid var(--color-border);
  background-color: #FFFFFF;
  color: var(--color-text);
  cursor: pointer;
  touch-action: manipulation;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
}

.m4-order-item-btn:hover:not(:disabled) {
  border-color: var(--color-primary);
  background-color: var(--color-primary-light);
}

/* Feedback Area */
.m4-feedback-box {
  width: 100%;
  max-width: 520px;
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  text-align: left;
  animation: fadeIn var(--transition-fast);
}

.m4-feedback-box.correct {
  background-color: #D1FAE5;
  border: 2px solid #34D399;
  color: #065F46;
}

.m4-feedback-box.wrong {
  background-color: #FEE2E2;
  border: 2px solid #FCA5A5;
  color: #991B1B;
}

.m4-feedback-header {
  font-size: var(--font-size-base);
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.m4-feedback-text {
  font-size: var(--font-size-sm);
  line-height: 1.5;
}

.m4-correct-answer-text {
  font-size: var(--font-size-sm);
  font-weight: 700;
  margin-top: 4px;
}

/* Controls / Buttons Row */
.m4-btn-row {
  display: flex;
  gap: var(--spacing-sm);
  width: 100%;
  max-width: 520px;
  justify-content: center;
  flex-wrap: wrap;
}

.m4-btn {
  min-height: 48px;
  min-width: 130px;
  padding: 10px 20px;
  font-size: var(--font-size-base);
}

/* Results Screen */
.m4-results-wrapper {
  width: 100%;
  display: flex;
  justify-content: center;
}

.m4-results-card {
  background: linear-gradient(180deg, #FFFFFF 0%, #EEF2FF 100%);
  border: 3px solid var(--color-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg) var(--spacing-md);
  width: 100%;
  max-width: 520px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
  box-shadow: var(--shadow-md);
  text-align: center;
  animation: popIn 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.m4-team-title {
  font-size: var(--font-size-xl);
  color: var(--color-primary);
  font-weight: 800;
}

.m4-score-display {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text);
}

.m4-stars-row {
  display: flex;
  gap: var(--spacing-xs);
  justify-content: center;
}

.m4-star {
  font-size: 42px;
  color: var(--color-star-empty);
}

.m4-star.filled {
  color: var(--color-star);
}

.m4-review-box {
  width: 100%;
  background-color: #FFFFFF;
  border: 2px solid #C7D2FE;
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.m4-review-box h3 {
  font-size: var(--font-size-sm);
  color: var(--color-primary);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.m4-review-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  list-style: none;
  padding: 0;
  margin-top: 4px;
}

.m4-review-chip {
  background-color: #FEE2E2;
  color: #991B1B;
  border: 1px solid #FCA5A5;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  font-size: var(--font-size-sm);
  font-weight: 600;
}

.m4-review-perfect {
  color: #065F46;
  font-weight: 700;
  font-size: var(--font-size-sm);
}

/* Activity 2 Label Drag Stage */
.m1-diagram-stage {
  position: relative;
  width: 300px;
  height: 300px;
  margin: 0 auto;
}

.m1-dropzone {
  position: absolute;
  transform: translate(-50%, -50%);
  min-width: 90px;
  min-height: 44px;
  padding: 6px 10px;
  background: rgba(255, 255, 255, 0.9);
  border: 2px dashed #94A3B8;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: auto;
  box-shadow: var(--shadow-sm);
  transition: background-color 0.2s, border-color 0.2s;
}

.m1-dropzone.placed {
  border-style: solid;
  border-color: #10B981;
  background-color: #D1FAE5;
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.2);
}

.m1-zone-hint {
  font-size: 13px;
  color: #64748B;
  font-weight: 600;
}

.m1-placed-label {
  font-size: 15px;
  font-weight: 700;
  color: #065F46;
}

.m1-feedback {
  width: 100%;
  max-width: 420px;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 600;
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #F1F5F9;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

.m1-feedback.success {
  background-color: #D1FAE5;
  color: #065F46;
  border-color: #34D399;
}

.m1-feedback.error {
  background-color: #FEE2E2;
  color: #991B1B;
  border-color: #FCA5A5;
}

.m1-labels-tray {
  width: 100%;
  max-width: 420px;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  align-items: center;
}

.m1-tray-title {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-text);
}

.m1-labels-container {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  justify-content: center;
  align-items: center;
  min-height: 52px;
}

.m1-draggable-label {
  min-width: 100px;
  min-height: 44px;
  padding: 8px 16px;
  background-color: var(--color-primary);
  color: #FFFFFF;
  font-weight: 700;
  font-size: var(--font-size-sm);
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 10px rgba(79, 70, 229, 0.3);
  cursor: grab;
  user-select: none;
  touch-action: none;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.1s;
}

.m1-draggable-label.dragging {
  cursor: grabbing;
  z-index: 1000;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.m1-draggable-label.shake {
  animation: m1Shake 0.4s ease-in-out;
}

@keyframes m1Shake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-8px); }
  40%, 80% { transform: translateX(8px); }
}

.m1-all-placed-msg {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: #065F46;
}

/* Activity 3 Quiz Grid */
.m1-quiz-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
  width: 100%;
  max-width: 440px;
}

@media (max-width: 420px) {
  .m1-quiz-grid {
    grid-template-columns: 1fr;
  }
}

.m1-quiz-card {
  background-color: #FFFFFF;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
  min-height: 160px;
}

.m1-quiz-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.m1-quiz-card.correct {
  border-color: #10B981;
  background-color: #F0FDF4;
  box-shadow: 0 0 12px rgba(16, 185, 129, 0.3);
}

.m1-quiz-card.wrong {
  border-color: #EF4444;
  background-color: #FEF2F2;
  animation: m1Shake 0.4s ease-in-out;
}

.m1-quiz-card-label {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-text);
}

/* Completion Screen */
.m1-completion-wrapper {
  width: 100%;
  display: flex;
  justify-content: center;
}

.m1-completion-card {
  background: linear-gradient(180deg, #FFFFFF 0%, #EEF2FF 100%);
  border: 3px solid var(--color-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg) var(--spacing-md);
  width: 100%;
  max-width: 500px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
  box-shadow: var(--shadow-md);
  text-align: center;
  animation: popIn 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.m1-trophy-icon {
  font-size: 56px;
  line-height: 1;
}

.m1-completion-header h2 {
  font-size: var(--font-size-xl);
  color: var(--color-primary);
  font-weight: 800;
}

.m1-completion-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.m1-stars-row {
  display: flex;
  gap: var(--spacing-xs);
}

.m1-star {
  font-size: 40px;
  color: var(--color-star-empty);
}

.m1-star.filled {
  color: var(--color-star);
}

.m1-summary-box {
  background-color: #FFFFFF;
  border: 2px solid #C7D2FE;
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.m1-summary-box h3 {
  font-size: var(--font-size-sm);
  color: var(--color-primary);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.m1-summary-box p {
  font-size: var(--font-size-sm);
  color: var(--color-text);
  line-height: 1.6;
}

/* Mission 2 */

.m2-mission-wrapper {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  text-align: center;
  align-items: center;
}

.m2-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
}

.m2-progress-badge {
  display: inline-block;
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: 700;
  font-size: var(--font-size-sm);
  padding: 4px var(--spacing-sm);
  border-radius: var(--radius-pill);
  border: 1px solid #C7D2FE;
}

.m2-title {
  font-size: var(--font-size-xl);
  color: var(--color-text);
  font-weight: 800;
}

.m2-card {
  width: 100%;
  max-width: 520px;
  background-color: var(--color-card-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
}

.m2-scenario-title {
  font-size: var(--font-size-lg);
  color: var(--color-primary);
  font-weight: 800;
}

.m2-story {
  font-size: var(--font-size-base);
  color: var(--color-text);
  line-height: 1.5;
}

.m2-question {
  font-size: var(--font-size-base);
  color: var(--color-text);
  line-height: 1.5;
}

.m2-svg-container {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  max-width: 300px;
}

.m2-svg {
  display: block;
  max-width: 100%;
  height: auto;
  user-select: none;
}

.m2-control-container {
  width: 100%;
  display: flex;
  justify-content: center;
}

.m2-input-group {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.m2-number-input {
  width: 130px;
  height: 48px;
  font-size: 20px;
  font-weight: 700;
  text-align: center;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color var(--transition-fast);
}

.m2-number-input:focus {
  border-color: var(--color-primary);
}

.m2-unit-tag {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-text-muted);
}

.m2-tap-instruction {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary);
  background-color: var(--color-primary-light);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-pill);
  border: 1px solid #C7D2FE;
}

.m2-btn-row {
  display: flex;
  gap: var(--spacing-sm);
  width: 100%;
  justify-content: center;
  flex-wrap: wrap;
}

.m2-btn {
  min-height: 48px;
  min-width: 120px;
  padding: 10px 20px;
  font-size: var(--font-size-base);
}

.m2-hint-box {
  width: 100%;
  background-color: #FEF3C7;
  color: #92400E;
  border: 1px solid #FCD34D;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  text-align: left;
}

.m2-feedback-box {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-align: center;
}

.m2-feedback-box.success {
  background-color: #D1FAE5;
  color: #065F46;
  border: 2px solid #34D399;
}

.m2-feedback-box.error {
  background-color: #FEE2E2;
  color: #991B1B;
  border: 2px solid #FCA5A5;
}

.m2-feedback-box.info {
  background-color: #E0F2FE;
  color: #075985;
  border: 2px solid #7DD3FC;
}

.m2-pairtalk-section {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 4px;
  text-align: left;
  background-color: #F8FAFC;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.m2-pairtalk-label {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-text);
}

.m2-pairtalk-input {
  width: 100%;
  height: 44px;
  font-size: var(--font-size-sm);
  padding: 8px var(--spacing-sm);
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--color-border);
  outline: none;
}

.m2-pairtalk-input:focus {
  border-color: var(--color-primary);
}

.m2-pairtalk-sub {
  font-size: 13px;
  color: var(--color-text-muted);
  font-style: italic;
}

/* Completion Screen M2 */
.m2-completion-wrapper {
  width: 100%;
  display: flex;
  justify-content: center;
}

.m2-completion-card {
  background: linear-gradient(180deg, #FFFFFF 0%, #EEF2FF 100%);
  border: 3px solid var(--color-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg) var(--spacing-md);
  width: 100%;
  max-width: 500px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
  box-shadow: var(--shadow-md);
  text-align: center;
  animation: popIn 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.m2-trophy-icon {
  font-size: 56px;
  line-height: 1;
}

.m2-completion-header h2 {
  font-size: var(--font-size-xl);
  color: var(--color-primary);
  font-weight: 800;
}

.m2-completion-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.m2-stars-row {
  display: flex;
  gap: var(--spacing-xs);
}

.m2-star {
  font-size: 40px;
  color: var(--color-star-empty);
}

.m2-star.filled {
  color: var(--color-star);
}

.m2-score-badge {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-pill);
  font-size: var(--font-size-sm);
  border: 1px solid #C7D2FE;
}

.m2-summary-box {
  background-color: #FFFFFF;
  border: 2px solid #C7D2FE;
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.m2-summary-box h3 {
  font-size: var(--font-size-sm);
  color: var(--color-primary);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.m2-summary-box p {
  font-size: var(--font-size-sm);
  color: var(--color-text);
  line-height: 1.6;
}

.m2-btn-large {
  min-height: 48px;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--font-size-base);
}

/* Mission 3 */

.m3-level-wrapper {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  align-items: center;
  text-align: center;
}

.m3-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
}

.m3-progress-badge {
  display: inline-block;
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: 700;
  font-size: var(--font-size-sm);
  padding: 4px var(--spacing-sm);
  border-radius: var(--radius-pill);
  border: 1px solid #C7D2FE;
}

.m3-title {
  font-size: var(--font-size-xl);
  color: var(--color-text);
  font-weight: 800;
}

.m3-instruction {
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
  max-width: 500px;
}

.m3-step-indicator-bar {
  display: flex;
  gap: var(--spacing-xs);
  justify-content: center;
  width: 100%;
  max-width: 500px;
}

.m3-step-chip {
  flex: 1;
  padding: 6px var(--spacing-xs);
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 600;
  background-color: #F1F5F9;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  transition: all 0.2s ease;
}

.m3-step-chip.active {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  border-color: #C7D2FE;
  font-weight: 700;
}

.m3-canvas-card {
  background-color: #FFFFFF;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-sm);
  box-shadow: var(--shadow-sm);
  width: 100%;
  max-width: 480px;
  display: flex;
  justify-content: center;
}

.m3-canvas-svg {
  display: block;
  max-width: 100%;
  height: auto;
  user-select: none;
}

.m3-step-control-card {
  width: 100%;
  max-width: 480px;
  background-color: #F8FAFC;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  text-align: left;
}

.m3-step-instruction {
  font-size: var(--font-size-base);
  color: var(--color-text);
}

.m3-guided-hint {
  font-size: var(--font-size-sm);
  color: var(--color-primary);
  font-weight: 600;
  margin-top: 4px;
}

.m3-slider-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.m3-slider-label {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-text);
}

.m3-radius-badge {
  background-color: #FEF3C7;
  color: #92400E;
  font-weight: 800;
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid #FCD34D;
  font-size: 15px;
}

.m3-slider {
  width: 100%;
  height: 12px;
  border-radius: 6px;
  background: #E2E8F0;
  outline: none;
  cursor: pointer;
  accent-color: var(--color-primary);
  touch-action: manipulation;
  margin-top: 6px;
}

.m3-slider-ticks {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--color-text-muted);
  margin-top: 2px;
}

.m3-hint-box {
  width: 100%;
  max-width: 480px;
  background-color: #FEF3C7;
  color: #92400E;
  border: 1px solid #FCD34D;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  text-align: left;
}

.m3-feedback-box {
  width: 100%;
  max-width: 480px;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-align: center;
}

.m3-feedback-box.success {
  background-color: #D1FAE5;
  color: #065F46;
  border: 2px solid #34D399;
}

.m3-feedback-box.error {
  background-color: #FEE2E2;
  color: #991B1B;
  border: 2px solid #FCA5A5;
}

.m3-btn-row {
  display: flex;
  gap: var(--spacing-sm);
  width: 100%;
  max-width: 480px;
  justify-content: center;
  flex-wrap: wrap;
}

.m3-btn {
  min-height: 48px;
  min-width: 120px;
  padding: 10px 20px;
  font-size: var(--font-size-base);
}

.m3-completed-card {
  background: linear-gradient(180deg, #FFFFFF 0%, #EEF2FF 100%);
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  width: 100%;
  max-width: 480px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
}

.m3-completed-stars {
  display: flex;
  gap: 6px;
}

.m3-star {
  font-size: 32px;
  color: var(--color-star-empty);
}

.m3-star.filled {
  color: var(--color-star);
}

.m3-completed-msg {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-primary);
}

/* Pulsing highlight for guided mode */
.pulse-element {
  animation: pulseGlow 1.8s infinite ease-in-out;
}

@keyframes pulseGlow {
  0% {
    box-shadow: 0 0 0 0 rgba(79, 70, 229, 0.4);
  }
  70% {
    box-shadow: 0 0 0 10px rgba(79, 70, 229, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(79, 70, 229, 0);
  }
}

/* Circle Drawing Sweep Animation */
.m3-circle-draw-anim {
  stroke-dasharray: 600;
  stroke-dashoffset: 600;
  animation: drawSweep 0.6s linear forwards;
}

@keyframes drawSweep {
  to {
    stroke-dashoffset: 0;
  }
}

/* Mission 3 Summary View */
.m3-summary-wrapper {
  width: 100%;
  display: flex;
  justify-content: center;
}

.m3-summary-card {
  background: linear-gradient(180deg, #FFFFFF 0%, #EEF2FF 100%);
  border: 3px solid var(--color-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg) var(--spacing-md);
  width: 100%;
  max-width: 520px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
  box-shadow: var(--shadow-md);
  text-align: center;
  animation: popIn 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.m3-trophy {
  font-size: 56px;
  line-height: 1;
}

.m3-summary-header h2 {
  font-size: var(--font-size-xl);
  color: var(--color-primary);
  font-weight: 800;
}

.m3-summary-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.m3-overall-stars {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.m3-star-score-text {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-text-muted);
}

.m3-section-title {
  font-size: var(--font-size-sm);
  color: var(--color-primary);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.m3-breakdown-box {
  width: 100%;
  background-color: #FFFFFF;
  border: 2px solid #C7D2FE;
  border-radius: var(--radius-md);
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.m3-level-score-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--font-size-sm);
  color: var(--color-text);
}

.m3-keyidea-box {
  width: 100%;
  background-color: #FEF3C7;
  border: 2px solid #FCD34D;
  border-radius: var(--radius-md);
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: center;
  color: #92400E;
}

.m3-keyidea-box h3 {
  font-size: var(--font-size-sm);
  font-weight: 800;
}

.m3-keyidea-box p {
  font-size: var(--font-size-base);
  margin-top: 2px;
}

.m3-diagram-box {
  width: 100%;
  background-color: #FFFFFF;
  border: 2px solid #C7D2FE;
  border-radius: var(--radius-md);
  padding: var(--spacing-sm);
  text-align: center;
}

.m3-btn-large {
  min-height: 48px;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--font-size-base);
}