/* ==========================================================================
   Core Design System & Shared Styles (common.css)
   ========================================================================== */

:root {
  /* ===== Color Palette: Blue + Cream/Kuning Lembut ===== */
  --color-cream-50: #FFFDF7;
  --color-cream-100: #FFF8E7;
  --color-cream-200: #F5E6CA;
  --color-cream-300: #EDDBB3;
  --color-cream-400: #E0C990;

  --color-blue-50: #EBF5FF;
  --color-blue-100: #E8F4FD;
  --color-blue-200: #C5E2F6;
  --color-blue-300: #90C4E8;
  --color-blue-400: #5B9BD5;
  --color-blue-500: #3B82C4;
  --color-blue-600: #2563A0;
  --color-blue-700: #1E4F80;
  --color-blue-800: #163B60;
  --color-blue-900: #0F2940;

  --color-gold-400: #D4A843;
  --color-gold-500: #C49B38;

  --color-green-400: #4CAF50;
  --color-green-500: #388E3C;

  --color-red-400: #EF5350;
  --color-red-500: #D32F2F;

  /* ===== Fonts ===== */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-arabic: 'Amiri', "Traditional Arabic", serif;
  --font-dyslexia: "OpenDyslexic", "Comic Sans MS", sans-serif;

  /* ===== Shadows & Spacing ===== */
  --shadow-soft: 0 2px 15px rgba(91, 155, 213, 0.08);
  --shadow-card: 0 4px 24px rgba(91, 155, 213, 0.12);
  --shadow-elevated: 0 8px 40px rgba(91, 155, 213, 0.16);
  --shadow-glow: 0 0 20px rgba(91, 155, 213, 0.25);
  
  --radius-xl: 1rem;
  --radius-2xl: 1.25rem;
  --radius-3xl: 1.5rem;
  
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* @font-face untuk OpenDyslexic (Simpan file font di public/fonts/) */
@font-face {
  font-family: 'OpenDyslexic';
  src: url('../public/fonts/OpenDyslexic-Regular.woff2') format('woff2'),
       url('../public/fonts/OpenDyslexic-Regular.woff') format('woff');
  font-weight: normal;
  font-style: normal;
}

/* ===== Base Styles ===== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background: linear-gradient(135deg, var(--color-cream-50) 0%, var(--color-cream-100) 50%, var(--color-blue-50) 100%);
  color: var(--color-blue-900);
  min-height: 100vh;
  line-height: 1.6;
  display: flex;
  flex-direction: column;
}

/* Base class untuk pola dekoratif di background */
.bg-pattern {
  background-image:
    radial-gradient(circle at 20% 80%, rgba(91, 155, 213, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(212, 168, 67, 0.05) 0%, transparent 50%);
  background-attachment: fixed;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* ===== Glassmorphism Cards ===== */
.glass-card {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 2.5px solid rgba(91, 155, 213, 0.25);
  box-shadow: var(--shadow-card);
}

.glass-card-strong {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  border: 2.5px solid rgba(91, 155, 213, 0.4);
  box-shadow: var(--shadow-elevated);
}

/* ===== Accessibility Font Zoom Helpers ===== */
/* (Hanya melakukan zoom untuk isi card materi di ebook saja, root font size tetap normal) */

/* Zoom khusus untuk slide card di ebook */
.font-scale-100 .slide-card-container { font-size: 100% !important; }
.font-scale-110 .slide-card-container { font-size: 110% !important; }
.font-scale-120 .slide-card-container { font-size: 120% !important; }
.font-scale-130 .slide-card-container { font-size: 130% !important; }
.font-scale-140 .slide-card-container { font-size: 140% !important; }
.font-scale-150 .slide-card-container { font-size: 150% !important; }
.font-scale-160 .slide-card-container { font-size: 160% !important; }

/* Font size overrides for arabic text when scaled */
.font-scale-100 .block-arabic { font-size: 1.5em; }
.font-scale-110 .block-arabic { font-size: 1.55em; }
.font-scale-120 .block-arabic { font-size: 1.6em; }
.font-scale-130 .block-arabic { font-size: 1.65em; }
.font-scale-140 .block-arabic { font-size: 1.7em; }
.font-scale-150 .block-arabic { font-size: 1.75em; }
.font-scale-160 .block-arabic { font-size: 1.8em; }

/* ===== Dyslexia Mode Overrides ===== */
body.dyslexia-mode {
  font-family: var(--font-dyslexia) !important;
  letter-spacing: 0.05em;
  word-spacing: 0.12em;
}

body.dyslexia-mode * {
  font-family: inherit !important;
  line-height: 1.8 !important;
}

body.dyslexia-mode [lang="ar"],
body.dyslexia-mode .arabic-text {
  font-family: var(--font-arabic) !important;
}

/* ===== CSS Keyframes Animations ===== */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

@keyframes pulse-soft {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.65; }
}

@keyframes fade-in-up {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulseGlow {
  0% { box-shadow: 0 0 0 0 rgba(91, 155, 213, 0.4); }
  70% { box-shadow: 0 0 0 10px rgba(91, 155, 213, 0); }
  100% { box-shadow: 0 0 0 0 rgba(91, 155, 213, 0); }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes popoverShow {
  from {
    opacity: 0;
    transform: scale(0.9) translateY(-10px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

/* Animation classes */
.animate-fade-in {
  animation: fadeIn 0.4s ease-out both;
}

.animate-slide-right {
  animation: slideInRight 0.4s ease-out both;
}

.animate-slide-left {
  animation: slideInLeft 0.4s ease-out both;
}

.animate-float {
  animation: float 2.5s ease-in-out infinite;
}

.animate-pulse-soft {
  animation: pulse-soft 2s ease-in-out infinite;
}

.animate-fade-in-up {
  animation: fade-in-up 0.5s ease-out both;
}

.animate-pulse-glow {
  animation: pulseGlow 2s infinite;
}

/* ===== Shared Navigation Elements ===== */
.back-link {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  color: var(--color-blue-500);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 600;
  transition: color 0.2s, transform 0.2s;
}

.back-link:hover {
  color: var(--color-blue-700);
  transform: translateX(-2px);
}

.chevron-icon {
  width: 1.25rem;
  height: 1.25rem;
  flex-shrink: 0;
}