@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;1,400&family=Playfair+Display:ital,wght@0,600;0,700;1,400&family=Amiri:ital,wght@0,400;0,700;1,400&display=swap');

:root {
  --primary: #1A365D;
  --primary-light: #2A4365;
  --primary-dark: #0F233D;
  --secondary: #0D9488;
  --secondary-light: #14B8A6;
  --secondary-dark: #0F766E;
  --accent-gold: #D97706;
  --bg-cream: #FFFDF9;
  --bg-white: #FFFFFF;
  --bg-surface: #F8FAFC;
  --text-main: #1E293B;
  --text-muted: #64748B;
  --border-subtle: #E2E8F0;
  --sidebar-w: 280px;
}

.dark {
  --primary: #38BDF8;
  --primary-light: #7DD3FC;
  --primary-dark: #0284C7;
  --secondary: #2DD4BF;
  --secondary-light: #5EEAD4;
  --secondary-dark: #14B8A6;
  --bg-cream: #0B132B;
  --bg-white: #111C38;
  --bg-surface: #1E293B;
  --text-main: #F1F5F9;
  --text-muted: #94A3B8;
  --border-subtle: #334155;
}

body {
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-cream);
  color: var(--text-main);
  transition: background-color 0.25s ease, color 0.25s ease;
  overflow-x: hidden;
}

.font-serif-quote {
  font-family: 'Playfair Display', Georgia, serif;
}

/* Custom Scrollbars */
::-webkit-scrollbar {
  width: 7px;
  height: 7px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: #CBD5E1;
  border-radius: 9999px;
}

.dark ::-webkit-scrollbar-thumb {
  background: #334155;
}

::-webkit-scrollbar-thumb:hover {
  background: #94A3B8;
}

/* Reading Progress Bar */
#reading-progress {
  height: 3px;
  background: linear-gradient(90deg, #1A365D 0%, #0D9488 100%);
  width: 0%;
  transition: width 0.1s ease-out;
}

.dark #reading-progress {
  background: linear-gradient(90deg, #38BDF8 0%, #2DD4BF 100%);
}

/* Animation Keyframes */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translate3d(0, 20px, 0);
  }
  to {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes pageFadeIn {
  from {
    opacity: 0;
    transform: translate3d(0, 14px, 0);
  }
  to {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
}

@keyframes floatGentle {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-4px);
  }
}

@keyframes pulseGlow {
  0%, 100% {
    box-shadow: 0 0 15px -3px rgba(13, 148, 136, 0.2);
  }
  50% {
    box-shadow: 0 0 25px 3px rgba(13, 148, 136, 0.4);
  }
}

/* Smooth Slide-In & Fade-In on Page Load */
@keyframes pageSlideIn {
  0% {
    opacity: 0;
    transform: translate3d(0, 20px, 0);
  }
  100% {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
}

main {
  animation: pageSlideIn 0.5s cubic-bezier(0.16, 1, 0.3, 1) both;
  will-change: opacity, transform;
}

/* Universal Progressive Scroll Reveal Classes */
.fade-in-section {
  opacity: 0;
  transform: translate3d(0, 24px, 0);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.fade-in-section.is-visible {
  opacity: 1;
  transform: translate3d(0, 0, 0);
}

/* Card-Level Smooth Fade & Stagger */
.fade-in-card {
  opacity: 0;
  transform: translate3d(0, 18px, 0);
  transition: opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.5s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 0.25s ease,
              border-color 0.2s ease;
  will-change: opacity, transform;
}

.fade-in-card.is-visible {
  opacity: 1;
  transform: translate3d(0, 0, 0);
}

.animate-fade-in-up {
  animation: fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) both;
}

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

.animate-float {
  animation: floatGentle 4s ease-in-out infinite;
}

.animate-pulse-glow {
  animation: pulseGlow 3s ease-in-out infinite;
}

/* Stagger Delays for Grid items */
.stagger-1 { animation-delay: 0.04s; }
.stagger-2 { animation-delay: 0.08s; }
.stagger-3 { animation-delay: 0.12s; }
.stagger-4 { animation-delay: 0.16s; }
.stagger-5 { animation-delay: 0.20s; }
.stagger-6 { animation-delay: 0.24s; }

/* Accessible Motion Preference */
@media (prefers-reduced-motion: reduce) {
  main, .fade-in-section, .fade-in-card, .mobile-nav-item, #mobile-drawer {
    animation: none !important;
    transition: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}

/* Google-tier Material 3 Ambient Hero Card */
.google-hero-card {
  position: relative;
  background: radial-gradient(circle at 85% 15%, rgba(13, 148, 136, 0.08) 0%, transparent 60%),
              radial-gradient(circle at 15% 85%, rgba(26, 54, 93, 0.06) 0%, transparent 60%),
              linear-gradient(135deg, #FFFFFF 0%, #F8FAFC 100%);
  border: 1px solid #E2E8F0;
  box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.05), inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

.dark .google-hero-card {
  background: radial-gradient(circle at 85% 20%, rgba(45, 212, 191, 0.12) 0%, transparent 65%),
              radial-gradient(circle at 15% 85%, rgba(56, 189, 248, 0.08) 0%, transparent 60%),
              linear-gradient(145deg, #111C38 0%, #0D162D 100%);
  border: 1px solid rgba(51, 65, 85, 0.85);
  box-shadow: 0 20px 45px -15px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

/* Subtle Tech Matrix Dots Overlay */
.tech-dots-overlay {
  background-image: radial-gradient(rgba(100, 116, 139, 0.1) 1px, transparent 1px);
  background-size: 24px 24px;
}

.dark .tech-dots-overlay {
  background-image: radial-gradient(rgba(148, 163, 184, 0.08) 1px, transparent 1px);
  background-size: 24px 24px;
}

/* Card hover glow & smooth scale */
.card-hover {
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.card-hover:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 28px -6px rgba(13, 148, 136, 0.12), 0 10px 14px -6px rgba(13, 148, 136, 0.06);
}

.dark .card-hover:hover {
  box-shadow: 0 14px 28px -6px rgba(45, 212, 191, 0.18), 0 10px 14px -6px rgba(45, 212, 191, 0.08);
}

/* Sidebar scroll-spy active indicator */
.toc-link {
  transition: all 0.2s ease;
}

.toc-link.active {
  color: #0D9488;
  font-weight: 600;
  border-left-color: #0D9488;
  background-color: rgba(13, 148, 136, 0.08);
  transform: translateX(2px);
}

.dark .toc-link.active {
  color: #2DD4BF;
  border-left-color: #2DD4BF;
  background-color: rgba(45, 212, 191, 0.12);
}

/* Search Modal backdrop animation */
.modal-backdrop {
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: opacity 0.25s ease;
}

/* ==========================================================================
   Smooth & Crisp Mobile Navigation & Hamburger Animation
   ========================================================================== */

/* Animated Hamburger Morph Icon */
.hamburger-btn {
  position: relative;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.hamburger-line {
  transition: transform 0.25s cubic-bezier(0.2, 0, 0, 1),
              opacity 0.2s ease,
              background-color 0.2s ease;
  transform-origin: center;
  will-change: transform, opacity;
}

.hamburger-btn.is-active .line-top {
  transform: translateY(6px) rotate(45deg);
}

.hamburger-btn.is-active .line-mid {
  opacity: 0;
  transform: scale(0);
}

.hamburger-btn.is-active .line-bot {
  transform: translateY(-6px) rotate(-45deg);
}

/* Mobile Drawer Overlay */
#mobile-overlay {
  opacity: 0;
  pointer-events: none;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: opacity 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity;
}

#mobile-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

/* Mobile Drawer Smooth Hardware-Accelerated Slide */
#mobile-drawer {
  transform: translate3d(100%, 0, 0);
  transition: transform 0.32s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: transform;
  -webkit-overflow-scrolling: touch;
  box-shadow: none;
}

#mobile-drawer.active {
  transform: translate3d(0, 0, 0);
  box-shadow: -10px 0 35px -5px rgba(0, 0, 0, 0.25);
}

.dark #mobile-drawer.active {
  box-shadow: -10px 0 40px -5px rgba(0, 0, 0, 0.6);
}

/* Visible Mobile Nav Items Slow & Premium Cascading Slide & Fade-In */
.mobile-nav-item, .mobile-nav-footer {
  opacity: 0 !important;
  transform: translate3d(16px, 0, 0) !important;
  transition-property: opacity, transform, background-color, color !important;
  transition-duration: 0.45s, 0.45s, 0.15s, 0.15s !important;
  transition-timing-function: cubic-bezier(0.16, 1, 0.3, 1), cubic-bezier(0.16, 1, 0.3, 1), ease, ease !important;
  will-change: opacity, transform;
  -webkit-tap-highlight-color: transparent;
}

#mobile-drawer.active .mobile-nav-item,
#mobile-drawer.active .mobile-nav-footer {
  opacity: 1 !important;
  transform: translate3d(0, 0, 0) !important;
}

/* Phase 1: Header & MAIN SECTIONS (Overview down to Demo UI Showcase) */
#mobile-drawer.active .mobile-nav-header { transition-delay: 0.05s; }
#mobile-drawer.active .mobile-nav-group-1 .mobile-nav-item:nth-child(1) { transition-delay: 0.09s; } /* MAIN SECTIONS */
#mobile-drawer.active .mobile-nav-group-1 .mobile-nav-item:nth-child(2) { transition-delay: 0.14s; } /* Overview & Summary */
#mobile-drawer.active .mobile-nav-group-1 .mobile-nav-item:nth-child(3) { transition-delay: 0.19s; } /* All Features */
#mobile-drawer.active .mobile-nav-group-1 .mobile-nav-item:nth-child(4) { transition-delay: 0.24s; } /* Queries */
#mobile-drawer.active .mobile-nav-group-1 .mobile-nav-item:nth-child(5) { transition-delay: 0.29s; } /* Technology Architecture */
#mobile-drawer.active .mobile-nav-group-1 .mobile-nav-item:nth-child(6) { transition-delay: 0.34s; } /* Timeline & Delivery Table */
#mobile-drawer.active .mobile-nav-group-1 .mobile-nav-item:nth-child(7) { transition-delay: 0.39s; } /* Demo UI Showcase (9 Screens) */

/* Phase 2: JUMP TO FEATURE (Sequenced AFTER Demo UI Showcase) */
#mobile-drawer.active .mobile-quick-nav .mobile-nav-item:nth-child(1) { transition-delay: 0.48s; } /* JUMP TO FEATURE */
#mobile-drawer.active .mobile-quick-nav .mobile-nav-item:nth-child(2) { transition-delay: 0.53s; } /* 1. Daily Inspiration */
#mobile-drawer.active .mobile-quick-nav .mobile-nav-item:nth-child(3) { transition-delay: 0.58s; } /* 2. Sacred Texts & Prayers */
#mobile-drawer.active .mobile-quick-nav .mobile-nav-item:nth-child(4) { transition-delay: 0.63s; } /* 3. Audio & Video Hub */
#mobile-drawer.active .mobile-quick-nav .mobile-nav-item:nth-child(5) { transition-delay: 0.68s; } /* 4. Community Spaces */
#mobile-drawer.active .mobile-quick-nav .mobile-nav-item:nth-child(6) { transition-delay: 0.73s; } /* 5. News, Blogs & Messages */
#mobile-drawer.active .mobile-quick-nav .mobile-nav-item:nth-child(7) { transition-delay: 0.78s; } /* 6. Bahá'í Calendar & Feasts */
#mobile-drawer.active .mobile-quick-nav .mobile-nav-item:nth-child(8) { transition-delay: 0.83s; } /* 7. Built-in Qiblih Compass */
#mobile-drawer.active .mobile-quick-nav .mobile-nav-item:nth-child(9) { transition-delay: 0.88s; } /* 8. AI Spiritual Assistant */
#mobile-drawer.active .mobile-quick-nav .mobile-nav-item:nth-child(10) { transition-delay: 0.93s; } /* 9. User Accounts & Modes */
#mobile-drawer.active .mobile-quick-nav .mobile-nav-item:nth-child(11) { transition-delay: 0.98s; } /* 10. Private Service Tracker */
#mobile-drawer.active .mobile-quick-nav .mobile-nav-item:nth-child(12) { transition-delay: 1.03s; } /* 11. Admin CMS Portal */
#mobile-drawer.active .mobile-quick-nav .mobile-nav-item:nth-child(13) { transition-delay: 1.08s; } /* 12. Accessibility & Lite Mode */

/* Phase 3: Drawer Footer */
#mobile-drawer.active .mobile-nav-footer {
  transition-delay: 0.55s;
}

/* Instant reset when closing drawer to prevent exit jitter */
#mobile-drawer:not(.active) .mobile-nav-item,
#mobile-drawer:not(.active) .mobile-nav-footer,
#mobile-drawer:not(.active) .mobile-nav-header {
  opacity: 0;
  transform: translate3d(16px, 0, 0);
  transition-duration: 0.12s;
  transition-delay: 0s !important;
}

.mobile-nav-item:active {
  transform: scale(0.98);
}

/* Print Stylesheet */
@media print {
  body {
    background: #ffffff !important;
    color: #000000 !important;
  }
  header, #sidebar, #mobile-drawer, #search-modal, .no-print {
    display: none !important;
  }
  main {
    margin: 0 !important;
    padding: 0 !important;
    max-width: 100% !important;
  }
  .card-hover {
    box-shadow: none !important;
    border: 1px solid #ddd !important;
  }
}