/* ===================================================================
   Horwang M.1 Hero - Joyful, Vibrant & High-Legibility Design System
   Bright Subject Colors, Rich Header & Calm, Readable Typography
   =================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Prompt:ital,wght@0,400;0,500;0,600;0,700;0,800;1,400&family=Sarabun:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&family=Fira+Code:wght@400;600&display=swap');

:root {
  --hw-maroon: #7B001C;
  --hw-dark-maroon: #520013;
  --hw-gold: #F59E0B;
  --hw-gold-light: #FEF3C7;
  --hw-slate-bg: #F8FAFC;
  --hw-border: #E2E8F0;
  --hw-text-main: #1E293B;
  --hw-text-muted: #64748B;
}

body {
  font-family: 'Sarabun', -apple-system, BlinkMacSystemFont, sans-serif;
  -webkit-font-smoothing: antialiased;
  background-color: #F8FAFC;
  color: var(--hw-text-main);
  font-size: 16px;
  line-height: 1.7;
}

h1, h2, h3, h4, h5, h6, .font-heading {
  font-family: 'Prompt', -apple-system, BlinkMacSystemFont, sans-serif;
  letter-spacing: -0.01em;
}

.font-mono {
  font-family: 'Fira Code', monospace;
}

/* Animations */
@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-6px); }
}
.animate-float {
  animation: float 3s ease-in-out infinite;
}

/* Smooth Kid Buttons */
.btn-kid {
  transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
  cursor: pointer;
  user-select: none;
}
.btn-kid:hover {
  transform: translateY(-2px) scale(1.02);
}
.btn-kid:active {
  transform: translateY(1px) scale(0.98);
}

/* Clean Modern Card */
.clean-card {
  background: #FFFFFF;
  border-radius: 20px;
  border: 1px solid var(--hw-border);
  box-shadow: 0 4px 12px -2px rgba(15, 23, 42, 0.04);
  transition: all 0.2s ease;
}
.clean-card:hover {
  box-shadow: 0 8px 24px -4px rgba(15, 23, 42, 0.08);
}

/* ===================================================================
   VIBRANT SUBJECT THEME CARDS
   =================================================================== */
.subject-card {
  cursor: pointer;
  transition: all 0.22s cubic-bezier(0.34, 1.56, 0.64, 1);
  border-radius: 20px;
  border: 2px solid transparent;
}
.subject-card:hover {
  transform: translateY(-3px) scale(1.02);
}

/* Math (Vibrant Rose) */
.subject-card-math {
  background: linear-gradient(180deg, #FFF1F2 0%, #FFE4E6 100%);
  border-color: #FECDD3;
}
.subject-card-math.active {
  border-color: #E11D48 !important;
  background: #FFE4E6 !important;
  box-shadow: 0 0 0 4px rgba(225, 29, 72, 0.2) !important;
}

/* Science (Mint Emerald) */
.subject-card-science {
  background: linear-gradient(180deg, #F0FDF4 0%, #DCFCE7 100%);
  border-color: #BBF7D0;
}
.subject-card-science.active {
  border-color: #16A34A !important;
  background: #DCFCE7 !important;
  box-shadow: 0 0 0 4px rgba(22, 163, 74, 0.2) !important;
}

/* English (Sky Ocean) */
.subject-card-english {
  background: linear-gradient(180deg, #F0F9FF 0%, #E0F2FE 100%);
  border-color: #BAE6FD;
}
.subject-card-english.active {
  border-color: #0284C7 !important;
  background: #E0F2FE !important;
  box-shadow: 0 0 0 4px rgba(2, 132, 199, 0.2) !important;
}

/* Thai (Sunny Amber) */
.subject-card-thai {
  background: linear-gradient(180deg, #FFFBEB 0%, #FEF3C7 100%);
  border-color: #FDE68A;
}
.subject-card-thai.active {
  border-color: #D97706 !important;
  background: #FEF3C7 !important;
  box-shadow: 0 0 0 4px rgba(217, 119, 6, 0.2) !important;
}

/* Social (Royal Purple) */
.subject-card-social {
  background: linear-gradient(180deg, #FAF5FF 0%, #F3E8FF 100%);
  border-color: #E9D5FF;
}
.subject-card-social.active {
  border-color: #9333EA !important;
  background: #F3E8FF !important;
  box-shadow: 0 0 0 4px rgba(147, 51, 234, 0.2) !important;
}

/* All Subjects (Horwang Maroon) */
.subject-card-all {
  background: linear-gradient(180deg, #FFF5F7 0%, #FCE7EB 100%);
  border-color: #F8B4C0;
}
.subject-card-all.active {
  border-color: var(--hw-maroon) !important;
  background: #FCE7EB !important;
  box-shadow: 0 0 0 4px rgba(123, 0, 28, 0.2) !important;
}

/* Option Buttons in Exam */
.option-btn {
  transition: all 0.18s ease;
  background: #FFFFFF;
  border: 2px solid #E2E8F0;
  border-radius: 16px;
}
.option-btn:hover {
  border-color: #CBD5E1;
  background: #F8FAFC;
}
.option-btn.selected {
  border-color: var(--hw-maroon) !important;
  background-color: #FFF5F7 !important;
  box-shadow: 0 0 0 3px rgba(123, 0, 28, 0.15) !important;
}
.option-btn.selected .opt-badge {
  background-color: var(--hw-maroon) !important;
  color: #FFFFFF !important;
  border-color: var(--hw-maroon) !important;
}

/* OMR 2B Sheet Simulation */
.omr-bubble {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 2px solid #CBD5E1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: 'Prompt', sans-serif;
  font-weight: 700;
  font-size: 13px;
  color: #475569;
  cursor: pointer;
  transition: all 0.15s ease;
  background: #FFFFFF;
}
.omr-bubble:hover {
  border-color: var(--hw-maroon);
  color: var(--hw-maroon);
  background: #FFF5F7;
}
.omr-bubble.filled {
  background-color: #1E293B !important;
  color: #FFFFFF !important;
  border-color: #0F172A !important;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.4);
}

/* Math Typography */
.katex {
  font-size: 1.15em !important;
  line-height: 1.4 !important;
}
.katex-display {
  margin: 0.75em 0 !important;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: #F1F5F9;
}
::-webkit-scrollbar-thumb {
  background: #CBD5E1;
  border-radius: 9999px;
}
::-webkit-scrollbar-thumb:hover {
  background: #94A3B8;
}

/* Print Sheet */
@media print {
  body { background: #FFFFFF !important; color: #000000 !important; }
  header, footer, nav, #sticky-exam-bar, .no-print { display: none !important; }
  #printable-exam-sheet { display: block !important; }
}