/* ==========================================================================
   MEDIA PEMBELAJARAN INTERAKTIF: MAROTIBUL QIRA'AH & LAHN
   CSS Design System & Stylesheet
   ========================================================================== */

/* --- Google Fonts Import --- */
@import url('https://fonts.googleapis.com/css2?family=Amiri:ital,wght@0,400;0,700;1,400&family=Noto+Naskh+Arabic:wght@400;600;700&family=Poppins:wght@300;400;500;600;700&family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

/* --- CSS Variables & Design Tokens --- */
:root {
  /* Color Palette - Islamic Modern Theme */
  --primary-50: #ecfdf5;
  --primary-100: #d1fae5;
  --primary-200: #a7f3d0;
  --primary-500: #10b981;
  --primary-600: #059669;
  --primary-700: #047857;
  --primary-800: #065f46;
  --primary-900: #064e3b;

  --accent-gold-100: #fef3c7;
  --accent-gold-400: #fbbf24;
  --accent-gold-500: #f59e0b;
  --accent-gold-600: #d97706;

  --danger-50: #fef2f2;
  --danger-500: #ef4444;
  --danger-600: #dc2626;

  --warning-50: #fffbeb;
  --warning-500: #f59e0b;

  --success-50: #f0fdf4;
  --success-500: #22c55e;

  /* Surfaces & Backgrounds */
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --bg-sidebar: #064e3b;
  --bg-header: #047857;
  --border-color: #e2e8f0;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --text-light: #f8fafc;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 10px 25px -5px rgba(6, 78, 59, 0.12);

  /* Typography */
  --font-sans: 'Plus Jakarta Sans', 'Poppins', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-arabic: 'Amiri', 'Noto Naskh Arabic', 'Traditional Arabic', serif;
  --base-font-size: 16px;

  /* Layout */
  --sidebar-width: 280px;
  --header-height: 70px;
  --bottom-nav-height: 65px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

/* --- Dark Theme Variables --- */
body.dark-theme {
  --bg-main: #0f172a;
  --bg-card: #1e293b;
  --bg-sidebar: #092e22;
  --bg-header: #0d382a;
  --border-color: #334155;
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.5);
}

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

html {
  font-size: var(--base-font-size);
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
}

/* Arabic Text Styling */
.arabic-text {
  font-family: var(--font-arabic);
  direction: rtl;
  text-align: right;
  font-size: 1.65rem;
  line-height: 2.2;
  color: var(--primary-900);
  font-weight: 700;
  display: block;
}

body.dark-theme .arabic-text {
  color: #6ee7b7;
}

.arabic-inline {
  font-family: var(--font-arabic);
  direction: rtl;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary-800);
  display: inline-block;
  margin: 0 4px;
}

body.dark-theme .arabic-inline {
  color: #34d399;
}

/* Base App Layout */
#app-container {
  display: flex;
  min-height: 100vh;
  width: 100%;
}

/* --- Header / Top Bar --- */
.top-header {
  position: fixed;
  top: 0;
  left: var(--sidebar-width);
  right: 0;
  height: var(--header-height);
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  z-index: 90;
  transition: left var(--transition-normal);
}

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

.brand-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary-600), var(--primary-800));
  color: #fff;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  box-shadow: 0 4px 8px rgba(6, 78, 59, 0.2);
}

.brand-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary-900);
  line-height: 1.2;
}

body.dark-theme .brand-title {
  color: var(--primary-200);
}

.brand-subtitle {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Widget Pill (XP & Streak) */
.user-stats-widget {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--primary-50);
  border: 1px solid var(--primary-200);
  padding: 6px 14px;
  border-radius: 30px;
}

body.dark-theme .user-stats-widget {
  background: rgba(16, 185, 129, 0.1);
  border-color: var(--primary-700);
}

.stat-pill {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary-800);
}

body.dark-theme .stat-pill {
  color: var(--primary-200);
}

.stat-pill .icon {
  font-size: 1rem;
}

/* Control Buttons */
.btn-icon {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
}

.btn-icon:hover {
  background: var(--primary-50);
  color: var(--primary-600);
  border-color: var(--primary-500);
  transform: translateY(-1px);
}

body.dark-theme .btn-icon:hover {
  background: rgba(16, 185, 129, 0.15);
}

/* --- Sidebar Navigation (Desktop) --- */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-sidebar);
  color: var(--text-light);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 100;
  box-shadow: 4px 0 15px rgba(0,0,0,0.1);
  transition: transform var(--transition-normal);
}

.sidebar-header {
  padding: 1.5rem 1.25rem;
  background: rgba(0, 0, 0, 0.15);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.sidebar-logo-icon {
  font-size: 2rem;
}

.sidebar-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent-gold-400);
  letter-spacing: 0.5px;
}

.sidebar-tag {
  font-size: 0.7rem;
  background: rgba(255, 255, 255, 0.15);
  padding: 2px 8px;
  border-radius: 10px;
  margin-top: 4px;
  display: inline-block;
}

.sidebar-menu {
  flex: 1;
  overflow-y: auto;
  padding: 1rem 0.75rem;
  list-style: none;
}

.menu-category {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: rgba(255,255,255,0.5);
  padding: 0.75rem 0.75rem 0.25rem 0.75rem;
  font-weight: 700;
}

.nav-item {
  margin-bottom: 4px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0.75rem 1rem;
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: 0.9rem;
  transition: var(--transition-fast);
  cursor: pointer;
}

.nav-link:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  transform: translateX(4px);
}

.nav-link.active {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
  color: #fff;
  font-weight: 700;
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

.nav-link .icon {
  font-size: 1.15rem;
  width: 24px;
  text-align: center;
}

.nav-link .badge-count {
  margin-left: auto;
  font-size: 0.7rem;
  background: var(--accent-gold-500);
  color: #000;
  font-weight: 800;
  padding: 2px 7px;
  border-radius: 10px;
}

.sidebar-footer {
  padding: 1rem;
  background: rgba(0, 0, 0, 0.2);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.75rem;
  text-align: center;
  color: rgba(255, 255, 255, 0.6);
}

/* --- Mobile Bottom Navigation --- */
.bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--bottom-nav-height);
  background: var(--bg-card);
  border-top: 1px solid var(--border-color);
  z-index: 100;
  justify-content: space-around;
  align-items: center;
  box-shadow: 0 -4px 15px rgba(0,0,0,0.08);
}

.bnav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.7rem;
  font-weight: 600;
  gap: 3px;
  width: 20%;
  height: 100%;
  cursor: pointer;
  transition: var(--transition-fast);
}

.bnav-item .icon {
  font-size: 1.3rem;
}

.bnav-item.active {
  color: var(--primary-600);
}

body.dark-theme .bnav-item.active {
  color: var(--primary-400);
}

/* --- Main Content Area --- */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  margin-top: var(--header-height);
  padding: 2rem;
  min-height: calc(100vh - var(--header-height));
  transition: margin-left var(--transition-normal);
  max-width: 1300px;
}

/* Section Views */
.view-section {
  display: none;
  animation: fadeIn 0.35s ease forwards;
}

.view-section.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- Landing Page / Cover Section --- */
.hero-wrapper {
  background: linear-gradient(135deg, var(--primary-800) 0%, var(--primary-900) 100%);
  border-radius: var(--radius-lg);
  color: #fff;
  padding: 3.5rem 2.5rem;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  margin-bottom: 2rem;
}

.hero-wrapper::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.15) 0%, transparent 70%);
  pointer-events: none;
  border-radius: 50%;
}

.hero-content {
  max-width: 750px;
  position: relative;
  z-index: 2;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(245, 158, 11, 0.2);
  border: 1px solid var(--accent-gold-500);
  color: var(--accent-gold-400);
  font-weight: 700;
  font-size: 0.85rem;
  padding: 6px 16px;
  border-radius: 30px;
  margin-bottom: 1.25rem;
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 0.75rem;
  letter-spacing: -0.5px;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: #a7f3d0;
  margin-bottom: 1rem;
  font-weight: 600;
}

.hero-desc {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 2rem;
}

.meta-chip {
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(5px);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 500;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.hero-actions {
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-gold-500), var(--accent-gold-600));
  color: #000;
  font-weight: 700;
  font-size: 1rem;
  padding: 12px 28px;
  border-radius: 30px;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(245, 158, 11, 0.3);
  transition: var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(245, 158, 11, 0.4);
  background: linear-gradient(135deg, var(--accent-gold-400), var(--accent-gold-500));
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  font-weight: 600;
  font-size: 1rem;
  padding: 12px 24px;
  border-radius: 30px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  cursor: pointer;
  transition: var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
}

/* Floating Quran Decorative Element */
.hero-illustration {
  position: absolute;
  right: 40px;
  bottom: 20px;
  opacity: 0.9;
  animation: floatAnim 4s ease-in-out infinite;
  pointer-events: none;
}

@keyframes floatAnim {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-12px) rotate(2deg); }
}

/* --- Section Titles & Layout Grid --- */
.section-header {
  margin-bottom: 1.75rem;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--primary-900);
  display: flex;
  align-items: center;
  gap: 12px;
}

body.dark-theme .section-title {
  color: var(--primary-200);
}

.section-subtitle {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Cards Grid Layout */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.dash-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  cursor: pointer;
  transition: var(--transition-fast);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.dash-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--primary-500);
  opacity: 0;
  transition: var(--transition-fast);
}

.dash-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-200);
}

.dash-card:hover::after {
  opacity: 1;
}

.card-icon {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-sm);
  background: var(--primary-50);
  color: var(--primary-600);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 1rem;
}

body.dark-theme .card-icon {
  background: rgba(16, 185, 129, 0.15);
  color: var(--primary-400);
}

.card-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.card-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
  flex: 1;
}

.card-footer-info {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--primary-600);
  border-top: 1px dashed var(--border-color);
  padding-top: 0.75rem;
}

/* --- Learning Objectives Cards --- */
.goals-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.25rem;
}

.goal-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  gap: 15px;
  align-items: flex-start;
  transition: var(--transition-fast);
}

.goal-number {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary-500);
  color: #fff;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.goal-content {
  flex: 1;
}

.goal-title {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.4;
}

.goal-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
}

.status-not-started {
  background: #f1f5f9;
  color: #64748b;
}

.status-in-progress {
  background: #fef3c7;
  color: #b45309;
}

.status-completed {
  background: #d1fae5;
  color: #047857;
}

/* --- Speed Spectrum (Interactive Marotibul Qira'ah) --- */
.spectrum-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-sm);
}

.spectrum-track {
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
  margin: 3rem 1rem 2rem 1rem;
}

.spectrum-track::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 6px;
  background: linear-gradient(90deg, #10b981 0%, #3b82f6 33%, #f59e0b 66%, #ef4444 100%);
  transform: translateY(-50%);
  border-radius: 4px;
  z-index: 1;
}

.spectrum-node {
  position: relative;
  z-index: 2;
  background: var(--bg-card);
  border: 3px solid var(--primary-500);
  border-radius: 50%;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  cursor: pointer;
  transition: var(--transition-fast);
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.spectrum-node.active, .spectrum-node:hover {
  transform: scale(1.2);
  border-color: var(--accent-gold-500);
  background: var(--primary-600);
  color: #fff;
  box-shadow: 0 0 15px rgba(245, 158, 11, 0.4);
}

.spectrum-label {
  position: absolute;
  top: -35px;
  left: 50%;
  transform: translateX(-50%);
  white-space: nowrap;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--primary-900);
}

body.dark-theme .spectrum-label {
  color: var(--primary-200);
}

.spectrum-speed {
  position: absolute;
  bottom: -30px;
  left: 50%;
  transform: translateX(-50%);
  white-space: nowrap;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.spectrum-details-box {
  background: var(--primary-50);
  border: 1px solid var(--primary-200);
  border-radius: var(--radius-sm);
  padding: 1.5rem;
  margin-top: 2rem;
}

body.dark-theme .spectrum-details-box {
  background: rgba(16, 185, 129, 0.08);
  border-color: var(--primary-700);
}

/* --- Interactive Flip & Expand Cards --- */
.expand-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 1.25rem;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-fast);
}

.expand-card-header {
  padding: 1.25rem 1.5rem;
  background: var(--bg-card);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 700;
  font-size: 1.1rem;
}

.expand-card-header:hover {
  background: var(--primary-50);
}

body.dark-theme .expand-card-header:hover {
  background: rgba(255, 255, 255, 0.05);
}

.expand-card-body {
  padding: 0 1.5rem 1.5rem 1.5rem;
  display: none;
  border-top: 1px solid var(--border-color);
  animation: fadeIn 0.3s ease;
}

.expand-card.open .expand-card-body {
  display: block;
}

.expand-card.open .toggle-icon {
  transform: rotate(180deg);
}

/* --- Content Boxes & Verse Cards --- */
.verse-box {
  background: linear-gradient(135deg, #f0fdf4 0%, #d1fae5 100%);
  border: 1px solid var(--primary-200);
  border-right: 5px solid var(--primary-600);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin: 1.25rem 0;
}

body.dark-theme .verse-box {
  background: rgba(6, 78, 59, 0.3);
  border-color: var(--primary-700);
}

.verse-translation {
  font-style: italic;
  margin-top: 0.75rem;
  font-size: 0.95rem;
  color: var(--text-main);
}

.audio-controls-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 1rem;
}

.btn-audio {
  background: var(--primary-600);
  color: #fff;
  border: none;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition-fast);
}

.btn-audio:hover {
  background: var(--primary-700);
  transform: scale(1.03);
}

/* Alert / Warning Boxes */
.callout-box {
  padding: 1.25rem;
  border-radius: var(--radius-sm);
  margin: 1rem 0;
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.callout-warning {
  background: #fffbeb;
  border: 1px solid #fef3c7;
  border-left: 4px solid #f59e0b;
  color: #92400e;
}

body.dark-theme .callout-warning {
  background: rgba(245, 158, 11, 0.1);
  color: #fde68a;
  border-color: var(--accent-gold-600);
}

.callout-danger {
  background: #fef2f2;
  border: 1px solid #fee2e2;
  border-left: 4px solid #ef4444;
  color: #991b1b;
}

body.dark-theme .callout-danger {
  background: rgba(239, 68, 68, 0.1);
  color: #fca5a5;
}

/* --- Comparison Matrix Table --- */
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.comparison-table th, .comparison-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.9rem;
}

.comparison-table th {
  background: var(--primary-800);
  color: #fff;
  font-weight: 700;
}

.comparison-table tr:hover {
  background: var(--primary-50);
}

body.dark-theme .comparison-table tr:hover {
  background: rgba(255, 255, 255, 0.05);
}

/* --- Lahn Big Cards --- */
.lahn-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
  margin: 1.5rem 0;
}

.lahn-card {
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  color: #fff;
  cursor: pointer;
  transition: var(--transition-fast);
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}

.lahn-card-jali {
  background: linear-gradient(135deg, #dc2626 0%, #991b1b 100%);
}

.lahn-card-khafi {
  background: linear-gradient(135deg, #d97706 0%, #92400e 100%);
}

.lahn-card:hover {
  transform: translateY(-50px) scale(1.02);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.lahn-card-title {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.lahn-card-sub {
  font-size: 0.95rem;
  opacity: 0.9;
  margin-bottom: 1rem;
}

/* --- Detective Tajwid Activity --- */
.detective-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-md);
}

.case-box {
  background: var(--primary-50);
  border: 1px dashed var(--primary-500);
  padding: 1.5rem;
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
  text-align: center;
}

body.dark-theme .case-box {
  background: rgba(16, 185, 129, 0.08);
}

.case-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-bottom: 1.5rem;
}

.opt-btn {
  padding: 1rem;
  border: 2px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-main);
  border-radius: var(--radius-sm);
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition-fast);
}

.opt-btn:hover {
  border-color: var(--primary-500);
  background: var(--primary-50);
}

.opt-btn.correct {
  background: #d1fae5 !important;
  border-color: #10b981 !important;
  color: #047857 !important;
}

.opt-btn.wrong {
  background: #fee2e2 !important;
  border-color: #ef4444 !important;
  color: #991b1b !important;
}

/* --- Drag & Drop Matching Game --- */
.matching-game-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin: 1.5rem 0;
}

.matching-column {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.match-item {
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  user-select: none;
  transition: var(--transition-fast);
  font-weight: 600;
  font-size: 0.9rem;
}

.match-item:hover {
  border-color: var(--primary-500);
}

.match-item.selected {
  border-color: var(--accent-gold-500);
  background: var(--accent-gold-100);
  color: #78350f;
}

.match-item.matched {
  border-color: var(--success-500);
  background: var(--success-50);
  color: #14532d;
  cursor: default;
  opacity: 0.7;
}

/* --- Flashcard Component --- */
.flashcard-wrapper {
  perspective: 1000px;
  max-width: 500px;
  margin: 2rem auto;
}

.flashcard {
  width: 100%;
  height: 280px;
  background: var(--bg-card);
  border: 2px solid var(--primary-500);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  text-align: center;
  cursor: pointer;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  transform-style: preserve-3d;
  position: relative;
}

.flashcard.flipped {
  transform: rotateY(180deg);
}

.card-face {
  backface-visibility: hidden;
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  border-radius: var(--radius-lg);
}

.card-back {
  transform: rotateY(180deg);
  background: var(--primary-50);
}

body.dark-theme .card-back {
  background: #1e293b;
}

/* --- Quiz Engine --- */
.quiz-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-md);
}

.quiz-header-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.progress-bar-wrap {
  width: 100%;
  height: 10px;
  background: var(--border-color);
  border-radius: 5px;
  overflow: hidden;
  margin-bottom: 1.5rem;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-500), var(--accent-gold-500));
  width: 0%;
  transition: width 0.3s ease;
}

.quiz-options-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 1.5rem 0;
}

.quiz-opt-card {
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: var(--transition-fast);
  font-weight: 500;
}

.quiz-opt-card:hover {
  border-color: var(--primary-500);
  background: var(--primary-50);
}

body.dark-theme .quiz-opt-card:hover {
  background: rgba(16, 185, 129, 0.1);
}

.quiz-opt-card.selected {
  border-color: var(--primary-600);
  background: var(--primary-100);
  font-weight: 700;
}

body.dark-theme .quiz-opt-card.selected {
  background: rgba(16, 185, 129, 0.2);
}

.opt-prefix {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
}

.quiz-opt-card.selected .opt-prefix {
  background: var(--primary-600);
  color: #fff;
}

/* --- Mind Map / Rangkuman Visual --- */
.mindmap-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
  margin: 2rem 0;
}

.mindmap-node {
  background: var(--bg-card);
  border: 2px solid var(--primary-500);
  padding: 1rem 2rem;
  border-radius: 30px;
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--primary-900);
  box-shadow: var(--shadow-md);
  cursor: pointer;
  transition: var(--transition-fast);

}

body.dark-theme .mindmap-node {
  color: var(--primary-200);
}

.mindmap-node:hover {
  transform: scale(1.08);
  border-color: var(--accent-gold-500);
}

.mindmap-branches {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  justify-content: center;
}

/* --- Certificate & Printable Results --- */
.certificate-frame {
  background: #fff;
  border: 12px double var(--primary-800);
  padding: 3rem 2rem;
  border-radius: var(--radius-lg);
  text-align: center;
  color: #1e293b;
  position: relative;
  box-shadow: var(--shadow-lg);
  margin: 2rem auto;
  max-width: 800px;
}

.cert-watermark {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  font-size: 10rem;
  opacity: 0.04;
  pointer-events: none;
  user-select: none;
}

.cert-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary-900);
  margin-bottom: 0.5rem;
  letter-spacing: 1px;
}

.cert-name {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--accent-gold-600);
  text-decoration: underline;
  margin: 1.5rem 0;
}

/* --- Toast & Modals --- */
.toast-container {
  position: fixed;
  bottom: 80px;
  right: 20px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  background: var(--bg-card);
  border-left: 5px solid var(--primary-500);
  padding: 1rem 1.25rem;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  font-size: 0.9rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
  animation: slideInRight 0.3s ease;
}

@keyframes slideInRight {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* --- Responsive Media Queries --- */
@media (max-width: 1024px) {
  :root {
    --sidebar-width: 0px;
  }

  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.mobile-open {
    transform: translateX(0);
    width: 260px;
  }

  .top-header {
    left: 0;
  }

  .main-content {
    margin-left: 0;
    padding: 1.25rem;
    padding-bottom: calc(var(--bottom-nav-height) + 1.5rem);
  }

  .bottom-nav {
    display: flex;
  }
}

@media (max-width: 640px) {
  .hero-title {
    font-size: 1.75rem;
  }
  
  .hero-wrapper {
    padding: 2rem 1.25rem;
  }

  .matching-game-container {
    grid-template-columns: 1fr;
  }

  .spectrum-track {
    margin: 2.5rem 0.5rem 1.5rem 0.5rem;
  }

  .spectrum-label {
    font-size: 0.75rem;
  }
}

/* --- Print Stylesheet --- */
@media print {
  body {
    background: #fff !important;
    color: #000 !important;
  }

  .sidebar, .top-header, .bottom-nav, .btn-icon, .btn-primary, .btn-secondary, .no-print {
    display: none !important;
  }

  .main-content {
    margin: 0 !important;
    padding: 0 !important;
  }

  .certificate-frame {
    border: 8px solid #064e3b !important;
    box-shadow: none !important;
    margin: 0 !important;
    width: 100% !important;
  }
}