/* ==========================================================================
   ห้องเรียนภาษาอังกฤษ Kru Boomie - Main Stylesheet
   โรงเรียนบ้านโจรก สพป.สุรินทร์ เขต 3
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Mitr:wght@400;500;600&family=Prompt:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&family=Fredoka:wght@500;600;700&display=swap');

:root {
  --primary: #3A86FF;
  --primary-light: #EBF4FF;
  --secondary: #FFBE0B;
  --accent: #FB5607;
  --pink: #FF006E;
  --purple: #8338EC;
  --mint: #06D6A0;
  --dark: #1D3557;
  --gray-bg: #F8F9FA;
  --card-bg: #FFFFFF;
  --border-color: #E2E8F0;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 9999px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 8px 24px rgba(58, 134, 255, 0.08);
  --shadow-lg: 0 16px 36px rgba(0, 0, 0, 0.1);
  --font-thai: 'Prompt', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-en: 'Fredoka', 'Prompt', sans-serif;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-thai);
  color: var(--dark);
  background-color: #F0F4F8;
  background-image: 
    radial-gradient(#3A86FF12 1px, transparent 1px),
    radial-gradient(#FFBE0B12 1px, transparent 1px);
  background-size: 24px 24px;
  background-position: 0 0, 12px 12px;
  line-height: 1.6;
  overflow-x: hidden;
}

/* Typography Helpers */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  color: var(--dark);
  line-height: 1.3;
}

.text-muted { color: #64748B; }
.text-sm { font-size: 0.875rem; }
.text-center { text-align: center; }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.w-16 { width: 4rem; }
.w-20 { width: 5rem; }
.w-28 { width: 7rem; }
.hidden { display: none !important; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.4rem;
  font-family: var(--font-thai);
  font-weight: 500;
  font-size: 1rem;
  border-radius: var(--radius-pill);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  text-decoration: none;
}

.btn:active {
  transform: scale(0.96);
}

.btn-primary {
  background: linear-gradient(135deg, #3A86FF 0%, #2A68D5 100%);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(58, 134, 255, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #2A68D5 0%, #1A54B8 100%);
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(58, 134, 255, 0.45);
}

.btn-secondary {
  background: #FFBE0B;
  color: #1D3557;
  font-weight: 600;
  box-shadow: 0 4px 14px rgba(255, 190, 11, 0.35);
}

.btn-secondary:hover {
  background: #E5A800;
  transform: translateY(-2px);
}

.btn-mint {
  background: var(--mint);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(6, 214, 160, 0.3);
}

.btn-outline {
  background: #FFFFFF;
  color: var(--primary);
  border-color: var(--primary);
}

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

.btn-danger {
  background: #FF5A5F;
  color: #FFFFFF;
}

.btn-success {
  background: #06D6A0;
  color: #FFFFFF;
}

.btn-sm {
  padding: 0.35rem 0.85rem;
  font-size: 0.85rem;
}

.btn-voice-mini {
  background: var(--primary-light);
  border: 1px solid #BFDBFE;
  color: var(--primary);
  border-radius: var(--radius-pill);
  padding: 0.2rem 0.5rem;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-voice-mini:hover {
  background: var(--primary);
  color: #FFFFFF;
  transform: scale(1.1);
}

/* Header & Navbar */
.top-notice-bar {
  background: linear-gradient(90deg, #FF6B6B, #FB5607);
  color: #FFFFFF;
  padding: 0.45rem 1rem;
  font-size: 0.85rem;
  text-align: center;
  font-weight: 500;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

.header-container {
  background: #FFFFFF;
  border-bottom: 2px solid #E2E8F0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}

.header-content {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.school-logo-img {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-pill);
  object-fit: contain;
  border: 2px solid var(--primary);
  background: #FFF;
}

.site-titles h1 {
  font-size: 1.15rem;
  color: var(--primary);
  margin-bottom: -2px;
}

.site-titles p {
  font-size: 0.8rem;
  color: #64748B;
}

.main-navigation {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.nav-link {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  color: #475569;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-pill);
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.nav-link:hover, .nav-link.active {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.hamburger-btn {
  display: none;
  background: transparent;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero Section */
.hero-section {
  padding: 2.5rem 1.25rem 2rem;
  max-width: 1240px;
  margin: 0 auto;
}

.hero-card {
  background: linear-gradient(135deg, #FFFFFF 0%, #F0F7FF 100%);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  box-shadow: var(--shadow-md);
  border: 2px solid #DCEBFE;
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  align-items: center;
  gap: 2rem;
}

.hero-badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.badge-pill {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-pill);
}

.badge-yellow { background: #FFF3CD; color: #856404; }
.badge-blue { background: #CCE5FF; color: #004085; }
.badge-green { background: #D4EDDA; color: #155724; }

.hero-title {
  font-size: 2.3rem;
  color: var(--dark);
  margin-bottom: 0.75rem;
}

.hero-title span {
  color: var(--primary);
}

.hero-slogan {
  font-size: 1.15rem;
  color: #334155;
  margin-bottom: 1.25rem;
  font-weight: 500;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

/* Student Quick Profile Bar */
.student-bar {
  background: #FFFFFF;
  border-radius: var(--radius-md);
  padding: 0.85rem 1.25rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid #E2E8F0;
}

.student-bar label {
  font-weight: 500;
  font-size: 0.9rem;
}

.student-bar input, .student-bar select {
  padding: 0.45rem 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid #CBD5E1;
  font-family: var(--font-thai);
  font-size: 0.9rem;
}

.hero-mascot-wrap {
  text-align: center;
  position: relative;
}

.hero-mascot-img {
  max-width: 100%;
  max-height: 280px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 4px solid #FFFFFF;
}

/* Grade Filter Pills */
.grade-filter-bar {
  max-width: 1240px;
  margin: 1rem auto 0;
  padding: 0 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.grade-pill {
  padding: 0.5rem 1.2rem;
  border-radius: var(--radius-pill);
  border: 2px solid #CBD5E1;
  background: #FFFFFF;
  font-family: var(--font-thai);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  color: #475569;
}

.grade-pill:hover, .grade-pill.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #FFFFFF;
  box-shadow: 0 4px 12px rgba(58, 134, 255, 0.25);
}

/* Section Containers */
.app-section {
  max-width: 1240px;
  margin: 2.5rem auto;
  padding: 0 1.25rem;
}

.section-head {
  text-align: center;
  margin-bottom: 2rem;
}

.section-badge {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
  font-size: 0.85rem;
  padding: 0.35rem 0.95rem;
  border-radius: var(--radius-pill);
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: 1.85rem;
  margin-bottom: 0.4rem;
}

.section-subtitle {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 0.85rem;
}

/* Meet Teacher Section */
.teacher-profile-card {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-md);
  border: 2px solid #E2E8F0;
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 2rem;
  align-items: center;
}

.teacher-photo-wrapper {
  text-align: center;
  position: relative;
}

.teacher-photo-img {
  width: 220px;
  height: 220px;
  border-radius: 50%;
  object-fit: cover;
  border: 5px solid #FFBE0B;
  box-shadow: var(--shadow-md);
}

.teacher-details h3 {
  font-size: 1.5rem;
  color: var(--dark);
  margin-bottom: 0.25rem;
}

.teacher-position {
  color: var(--primary);
  font-weight: 500;
  margin-bottom: 1rem;
}

.teacher-bio {
  font-size: 1rem;
  color: #475569;
  line-height: 1.7;
  background: #F8FAFC;
  padding: 1.25rem;
  border-radius: var(--radius-md);
  border-left: 4px solid var(--primary);
}

/* Objectives Grid */
.objectives-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1rem;
}

.obj-card {
  background: #FFFFFF;
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid #E2E8F0;
  transition: all 0.2s;
}

.obj-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: #BFDBFE;
}

.obj-icon {
  font-size: 1.8rem;
  flex-shrink: 0;
}

.obj-text {
  font-size: 0.95rem;
  color: #334155;
  font-weight: 500;
}

/* Grade Guides */
.grade-guides-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.grade-guide-card {
  background: #FFFFFF;
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.guide-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.guide-icon { font-size: 2.2rem; }
.guide-grade { font-size: 1.2rem; }
.guide-badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-pill);
}

.guide-focus {
  font-size: 0.9rem;
  color: #475569;
  line-height: 1.6;
}

/* Unit Blocks */
.unit-block {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  box-shadow: var(--shadow-md);
  border: 1px solid #E2E8F0;
  margin-bottom: 2.5rem;
}

.unit-header {
  margin-bottom: 1.5rem;
  border-bottom: 2px dashed #E2E8F0;
  padding-bottom: 1.25rem;
}

.unit-title-group {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.5rem;
}

.unit-icon { font-size: 2.5rem; }
.unit-badge {
  font-size: 0.8rem;
  font-weight: 600;
  background: #EBF4FF;
  color: var(--primary);
  padding: 0.25rem 0.7rem;
  border-radius: var(--radius-pill);
}

.unit-title { font-size: 1.6rem; }
.unit-desc { color: #64748B; font-size: 0.95rem; }

/* Vocab Cards Grid */
.vocab-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
}

.vocab-card {
  background: #F8FAFC;
  border: 1px solid #E2E8F0;
  border-radius: var(--radius-md);
  padding: 1rem;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  cursor: pointer;
  transition: all 0.2s;
  position: relative;
}

.vocab-card:hover {
  background: #FFFFFF;
  transform: translateY(-2px);
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.vocab-emoji { font-size: 2.2rem; flex-shrink: 0; }
.vocab-info { display: flex; flex-direction: column; flex-grow: 1; }
.vocab-en { font-family: var(--font-en); font-weight: 600; font-size: 1.15rem; color: var(--primary); }
.vocab-phonetic { font-size: 0.8rem; color: #94A3B8; }
.vocab-th { font-size: 0.9rem; color: #334155; }

/* Sentence Grid */
.sentences-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 1rem;
}

.sentence-card {
  background: #F8FAFC;
  border-radius: var(--radius-md);
  padding: 1.15rem;
  border-left: 4px solid var(--mint);
}

.st-q, .st-a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.4rem 0;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all 0.15s;
}

.st-q:hover, .st-a:hover {
  background: #FFFFFF;
}

.st-text { font-size: 0.95rem; color: #1E293B; }
.st-th { color: #64748B; font-size: 0.85rem; margin-left: 0.35rem; }

.unit-task-card {
  background: linear-gradient(135deg, #FFFBEB 0%, #FEF3C7 100%);
  border: 2px dashed #F59E0B;
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
}

.task-badge {
  font-size: 0.8rem;
  font-weight: 600;
  color: #B45309;
  margin-bottom: 0.35rem;
}

/* Interactive Fridge Activity Widget */
.fridge-widget-container {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-md);
  border: 2px solid #E2E8F0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.food-selection-box h4 {
  margin-bottom: 0.75rem;
}

.food-chips-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.food-chip {
  background: #F1F5F9;
  border: 1px solid #CBD5E1;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-thai);
  font-size: 0.88rem;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.food-chip:hover {
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

.fridge-visual-box {
  background: linear-gradient(180deg, #E2E8F0 0%, #CBD5E1 100%);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  border: 4px solid #94A3B8;
  position: relative;
  box-shadow: inset 0 4px 12px rgba(0,0,0,0.1);
}

.fridge-header-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.fridge-interior {
  background: #FFFFFF;
  border-radius: var(--radius-md);
  min-height: 200px;
  padding: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-content: flex-start;
  border: 2px dashed #CBD5E1;
}

.empty-fridge-hint {
  width: 100%;
  text-align: center;
  color: #94A3B8;
  margin: auto;
}

.fridge-item-pill {
  background: #DCFCE7;
  color: #166534;
  border: 1px solid #86EFAC;
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-pill);
  font-weight: 500;
  font-size: 0.9rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: all 0.2s;
}

.fridge-item-pill:hover {
  background: #FEE2E2;
  color: #991B1B;
  border-color: #FCA5A5;
}

.remove-x { font-size: 0.75rem; }

.fridge-speech-bubble {
  background: #FEF3C7;
  border: 1px solid #FCD34D;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-md);
  margin-top: 1rem;
}

/* Critical Thinking Cards */
.critical-thinking-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(480px, 1fr));
  gap: 1.5rem;
}

.ct-card {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  border: 2px solid #E2E8F0;
  transition: all 0.2s;
}

.ct-card:hover {
  box-shadow: var(--shadow-md);
  border-color: #BFDBFE;
}

.ct-header {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  margin-bottom: 1.25rem;
}

.ct-icon { font-size: 2rem; flex-shrink: 0; }
.ct-badge {
  font-size: 0.75rem;
  font-weight: 600;
  background: #EDE9FE;
  color: var(--purple);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-pill);
  display: inline-block;
  margin-bottom: 0.25rem;
}

.ct-question {
  font-size: 1.05rem;
  line-height: 1.5;
  color: var(--dark);
}

.ct-options-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.ct-opt-btn {
  text-align: left;
  background: #F8FAFC;
  border: 1px solid #E2E8F0;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  font-family: var(--font-thai);
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s;
  color: #334155;
}

.ct-opt-btn:hover {
  background: #F1F5F9;
  border-color: #CBD5E1;
}

.ct-opt-btn.correct {
  background: #DCFCE7;
  border-color: #22C55E;
  color: #15803D;
  font-weight: 600;
}

.ct-opt-btn.wrong {
  background: #FEE2E2;
  border-color: #EF4444;
  color: #B91C1C;
}

.ct-feedback-box {
  margin-top: 1rem;
  padding: 1rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
}

.ct-feedback-box.correct-box {
  background: #F0FDF4;
  border: 1px solid #BBF7D0;
  color: #166534;
}

.ct-feedback-box.hint-box {
  background: #FFFBEB;
  border: 1px solid #FDE68A;
  color: #92400E;
}

.feedback-title { font-weight: 600; margin-bottom: 0.25rem; }

/* Action Game Section */
.game-container-card {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-lg);
  border: 3px solid #3A86FF;
}

.game-controls-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.game-cat-selector {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.game-cat-btn {
  padding: 0.35rem 0.8rem;
  border-radius: var(--radius-pill);
  border: 1px solid #CBD5E1;
  background: #F8FAFC;
  font-family: var(--font-thai);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s;
}

.game-cat-btn.active, .game-cat-btn:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: #FFFFFF;
}

.canvas-viewport {
  position: relative;
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
  background: #70C1FF;
}

#game-canvas {
  width: 100%;
  height: auto;
  display: block;
}

.game-touch-controls {
  display: flex;
  justify-content: space-between;
  max-width: 800px;
  margin: 1rem auto 0;
  padding: 0 0.5rem;
}

.touch-btn {
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-pill);
  background: #3A86FF;
  color: #FFFFFF;
  border: none;
  font-weight: 600;
  font-size: 1.1rem;
  cursor: pointer;
  box-shadow: 0 4px 8px rgba(0,0,0,0.15);
  user-select: none;
  -webkit-user-select: none;
}

.touch-btn:active {
  transform: scale(0.92);
}

.touch-btn-jump {
  background: #FF006E;
  padding: 0.75rem 2rem;
}

/* Quiz Section */
.quiz-wrapper {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  box-shadow: var(--shadow-md);
  border: 1px solid #E2E8F0;
}

.quiz-instruction-box {
  background: #F0FDF4;
  border: 1px solid #BBF7D0;
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.quiz-items-container {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.quiz-item-card {
  background: #F8FAFC;
  border: 1px solid #E2E8F0;
  border-radius: var(--radius-md);
  padding: 1.25rem;
  transition: all 0.2s;
}

.quiz-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}

.quiz-num-badge {
  background: var(--primary-light);
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-pill);
}

.quiz-q-text { font-size: 1.1rem; color: var(--dark); }
.quiz-q-en { font-size: 0.85rem; margin-bottom: 1rem; }

.quiz-options-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.quiz-option-label {
  background: #FFFFFF;
  border: 2px solid #CBD5E1;
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.95rem;
  transition: all 0.2s;
}

.quiz-option-label:hover {
  border-color: var(--primary);
  background: #F0F7FF;
}

.quiz-option-label.correct-answer {
  background: #DCFCE7 !important;
  border-color: #22C55E !important;
  color: #166534 !important;
  font-weight: 600;
}

.quiz-option-label.wrong-answer {
  background: #FEE2E2 !important;
  border-color: #EF4444 !important;
  color: #991B1B !important;
}

.quiz-explanation {
  margin-top: 0.85rem;
  padding: 0.6rem 0.9rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  background: #F1F5F9;
  border-left: 4px solid var(--primary);
}

.explain-badge {
  font-weight: 600;
  color: var(--primary);
}

/* Certificate & Results */
.result-box {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 2rem;
  text-align: center;
  box-shadow: var(--shadow-lg);
  margin-top: 2rem;
}

.result-stars { font-size: 2.2rem; margin-bottom: 0.5rem; }
.result-score { font-size: 1.8rem; color: var(--dark); }
.result-level { font-size: 1.25rem; margin-bottom: 0.5rem; }
.result-advice { color: #64748B; max-width: 600px; margin: 0 auto; }

.certificate-preview {
  max-width: 650px;
  margin: 1.5rem auto 0;
  background: #FFFDF9;
  padding: 1.5rem;
  border: 8px double #C69214;
  box-shadow: var(--shadow-md);
  border-radius: 4px;
}

.cert-border {
  border: 1px solid #E5C378;
  padding: 1.5rem;
}

.cert-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.cert-logo { width: 44px; height: 44px; object-fit: contain; }
.cert-title { font-size: 1.4rem; color: #8C6208; margin-bottom: 0.5rem; }
.cert-name { font-size: 1.5rem; color: #1D3557; margin: 0.5rem 0; border-bottom: 1px dashed #CBD5E1; display: inline-block; padding: 0 1rem; }
.cert-desc { font-size: 0.9rem; color: #475569; margin-bottom: 1.25rem; }
.cert-footer { display: flex; justify-content: space-between; font-size: 0.85rem; color: #64748B; border-top: 1px solid #E2E8F0; padding-top: 0.75rem; }

/* Worksheet View & Editor */
.worksheet-tabs-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.ws-tab-btn {
  padding: 0.55rem 1.25rem;
  border-radius: var(--radius-pill);
  background: #FFFFFF;
  border: 2px solid #CBD5E1;
  font-family: var(--font-thai);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.ws-tab-btn.active {
  background: var(--purple);
  border-color: var(--purple);
  color: #FFFFFF;
}

.worksheet-paper {
  background: #FFFFFF;
  border: 2px solid #CBD5E1;
  border-radius: var(--radius-md);
  padding: 2.5rem 2rem;
  box-shadow: var(--shadow-md);
  max-width: 850px;
  margin: 0 auto;
}

.ws-school-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  border-bottom: 2px solid #334155;
  padding-bottom: 1rem;
  margin-bottom: 1.25rem;
}

.ws-logo { width: 64px; height: 64px; object-fit: contain; }
.ws-header-text h3 { font-size: 1.3rem; margin-bottom: 0.15rem; }
.ws-header-text p { font-size: 0.85rem; color: #475569; }
.ws-header-text .ws-sub { color: var(--primary); font-weight: 500; }

.ws-meta-row {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid #E2E8F0;
  font-size: 0.9rem;
}

.ws-input {
  border: none;
  border-bottom: 1px dashed #64748B;
  outline: none;
  font-family: var(--font-thai);
  font-size: 0.9rem;
  padding: 0.15rem 0.35rem;
}

.ws-instructions {
  background: #F1F5F9;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  margin-bottom: 1.25rem;
}

.ws-task-table table {
  width: 100%;
  border-collapse: collapse;
}

.ws-task-table th, .ws-task-table td {
  border: 1px solid #CBD5E1;
  padding: 0.65rem 0.75rem;
  font-size: 0.9rem;
  text-align: left;
}

.ws-task-table th { background: #F8FAFC; }

.ws-table-input {
  width: 100%;
  border: 1px solid #E2E8F0;
  border-radius: var(--radius-sm);
  padding: 0.35rem 0.5rem;
  font-family: var(--font-thai);
  font-size: 0.9rem;
}

.ws-table-input:focus {
  border-color: var(--primary);
  outline: none;
}

.drawing-canvas-wrapper {
  border: 2px dashed #94A3B8;
  border-radius: var(--radius-md);
  background: #FAFBFD;
  position: relative;
  text-align: center;
  margin-top: 0.5rem;
}

#ws-draw-canvas {
  width: 100%;
  max-width: 680px;
  height: 220px;
  display: block;
  margin: 0 auto;
  cursor: crosshair;
}

.canvas-tools {
  padding: 0.5rem;
  background: #F1F5F9;
  border-top: 1px solid #E2E8F0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.ws-textarea {
  width: 100%;
  border: 1px solid #CBD5E1;
  border-radius: var(--radius-sm);
  padding: 0.5rem;
  font-family: var(--font-thai);
  font-size: 0.9rem;
  resize: vertical;
  margin-top: 0.5rem;
}

.ws-signature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid #E2E8F0;
  font-size: 0.9rem;
}

.sig-box p { margin-bottom: 0.5rem; }

/* Activity Gallery */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.gallery-card {
  background: #FFFFFF;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid #E2E8F0;
  display: flex;
  flex-direction: column;
}

.gallery-img-wrap {
  position: relative;
  height: 200px;
  background: #E2E8F0;
}

.gallery-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.gallery-tag {
  position: absolute;
  top: 10px;
  right: 10px;
  background: rgba(0, 0, 0, 0.65);
  color: #FFFFFF;
  font-size: 0.75rem;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-pill);
}

.gallery-content {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.gallery-title { font-size: 1.05rem; margin-bottom: 0.35rem; }
.gallery-caption { font-size: 0.88rem; color: #475569; flex-grow: 1; }
.gallery-meta { display: flex; justify-content: space-between; align-items: center; margin-top: 0.75rem; color: #94A3B8; font-size: 0.8rem; }

/* Teacher Dashboard */
.teacher-panel-card {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  box-shadow: var(--shadow-lg);
  border: 2px solid #8338EC;
}

.teacher-stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: #F8FAFC;
  border-radius: var(--radius-md);
  padding: 1.25rem;
  text-align: center;
  border: 1px solid #E2E8F0;
}

.stat-num { font-size: 2.2rem; font-weight: 700; color: var(--purple); }
.stat-label { font-size: 0.9rem; color: #64748B; }

.teacher-manage-forms {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.manage-box {
  background: #F8FAFC;
  border-radius: var(--radius-md);
  padding: 1.5rem;
  border: 1px solid #E2E8F0;
}

.manage-box h4 { margin-bottom: 1rem; color: var(--dark); }

.form-group {
  margin-bottom: 0.85rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 0.25rem;
}

.form-input {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid #CBD5E1;
  font-family: var(--font-thai);
  font-size: 0.9rem;
}

/* Submissions Table */
.table-responsive {
  width: 100%;
  overflow-x: auto;
}

.submissions-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
}

.submissions-table th, .submissions-table td {
  padding: 0.75rem 1rem;
  border: 1px solid #E2E8F0;
  text-align: left;
  font-size: 0.9rem;
}

.submissions-table th { background: #F1F5F9; color: var(--dark); font-weight: 600; }
.badge-grade { background: #E0E7FF; color: #3730A3; padding: 0.2rem 0.5rem; border-radius: var(--radius-pill); font-size: 0.8rem; font-weight: 500; }

/* Modal & Toast */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 2000;
}

.modal-overlay.show {
  display: flex;
}

.modal-card {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 2rem;
  width: 90%;
  max-width: 420px;
  box-shadow: var(--shadow-lg);
  animation: popUp 0.25s ease-out;
}

#app-toast {
  visibility: hidden;
  min-width: 280px;
  background-color: #1D3557;
  color: #FFFFFF;
  text-align: center;
  border-radius: var(--radius-pill);
  padding: 0.75rem 1.5rem;
  position: fixed;
  z-index: 3000;
  left: 50%;
  bottom: 30px;
  transform: translateX(-50%);
  font-size: 0.95rem;
  box-shadow: var(--shadow-lg);
}

#app-toast.show {
  visibility: visible;
  animation: fadein 0.3s, fadeout 0.3s 3.2s;
}

/* Animations */
@keyframes fadein {
  from { bottom: 0; opacity: 0; }
  to { bottom: 30px; opacity: 1; }
}

@keyframes fadeout {
  from { bottom: 30px; opacity: 1; }
  to { bottom: 0; opacity: 0; }
}

@keyframes popUp {
  from { transform: scale(0.9); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

/* Footer */
.site-footer {
  background: #FFFFFF;
  border-top: 2px solid #E2E8F0;
  padding: 3rem 1.25rem 2rem;
  margin-top: 4rem;
}

.footer-content {
  max-width: 1240px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-bottom {
  max-width: 1240px;
  margin: 0 auto;
  border-top: 1px solid #E2E8F0;
  padding-top: 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: #64748B;
}

/* Print Optimization for Worksheets & Certificate */
@media print {
  body {
    background: #FFFFFF !important;
    color: #000000 !important;
    font-size: 12pt !important;
  }

  .top-notice-bar,
  .header-container,
  .hero-section,
  .grade-filter-bar,
  #objectives,
  #teacher,
  #lessons,
  #critical-thinking,
  #game,
  #quiz,
  #gallery,
  #teacher-panel,
  .worksheet-tabs-bar,
  .worksheet-actions-bar,
  .canvas-tools,
  .site-footer,
  .no-print {
    display: none !important;
  }

  .worksheet-paper, .certificate-preview {
    border: none !important;
    box-shadow: none !important;
    padding: 0 !important;
    max-width: 100% !important;
    width: 100% !important;
    margin: 0 !important;
  }

  .ws-input, .ws-table-input, .ws-textarea {
    border: none !important;
    border-bottom: 1px solid #000000 !important;
  }

  @page {
    size: A4 portrait;
    margin: 1.2cm;
  }
}

/* Responsive Media Queries */
@media (max-width: 992px) {
  .hero-card {
    grid-template-columns: 1fr;
    text-align: center;
    padding: 2rem 1.5rem;
  }

  .hero-badge-row, .hero-buttons {
    justify-content: center;
  }

  .teacher-profile-card {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .teacher-photo-img {
    margin: 0 auto;
  }

  .fridge-widget-container,
  .teacher-manage-forms {
    grid-template-columns: 1fr;
  }

  .grade-guides-grid {
    grid-template-columns: 1fr;
  }

  .footer-content {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .main-navigation {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #FFFFFF;
    flex-direction: column;
    padding: 1rem;
    box-shadow: var(--shadow-md);
    border-bottom: 2px solid #E2E8F0;
  }

  .main-navigation.open {
    display: flex;
  }

  .hamburger-btn {
    display: block;
  }

  .quiz-options-grid {
    grid-template-columns: 1fr;
  }

  .ws-meta-row {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }

  .ws-signature-row {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .teacher-stats-row {
    grid-template-columns: 1fr;
  }
}