/* ==========================================================================
   ReadFocus Academy - PHP Edition Global Design System
   Inspired by Joyful, Child-Centric EdTech & Clinical Aesthetics
   ========================================================================== */

:root {
  /* Color Palette */
  --primary-orange: #FF8A00;
  --primary-orange-hover: #E07500;
  --primary-yellow: #FFB703;
  --primary-yellow-light: #FEF3C7;
  --primary-teal: #2EC4B6;
  --primary-blue: #0284C7;
  --primary-blue-light: #E0F2FE;
  --primary-pink: #FF5D8F;
  --primary-pink-light: #FCE7F3;
  --primary-purple: #8338EC;
  --primary-purple-light: #F3E8FF;
  --primary-green: #16A34A;
  --primary-green-light: #DCFCE7;

  /* Neutrals */
  --bg-cream: #FCFAF6;
  --bg-white: #FFFFFF;
  --bg-sand: #F7F3E9;
  --text-dark: #1E293B;
  --text-muted: #64748B;
  --text-light: #94A3B8;
  --border-light: #E2E8F0;

  /* Shadows & Radius */
  --shadow-sm: 0 2px 8px rgba(30, 41, 59, 0.05);
  --shadow-md: 0 8px 24px rgba(30, 41, 59, 0.07);
  --shadow-lg: 0 16px 40px rgba(30, 41, 59, 0.1);
  --shadow-button: 0 4px 14px rgba(255, 138, 0, 0.4);

  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 28px;
  --radius-pill: 9999px;

  /* Fonts */
  --font-display: 'Fredoka', 'Quicksand', cursive, sans-serif;
  --font-heading: 'Outfit', 'Plus Jakarta Sans', sans-serif;
  --font-body: 'Plus Jakarta Sans', 'Outfit', sans-serif;
  --font-dyslexic: 'Comic Sans MS', 'OpenDyslexic', 'Quicksand', sans-serif;
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-body);
  background-color: var(--bg-cream);
  color: var(--text-dark);
}

body {
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

/* RTL Support for Arabic */
[dir="rtl"] {
  font-family: 'Outfit', 'Segoe UI', Tahoma, sans-serif;
  text-align: right;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg-sand);
}
::-webkit-scrollbar-thumb {
  background: var(--primary-yellow);
  border-radius: 9999px;
  border: 2px solid var(--bg-sand);
}

/* Container */
.container {
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* Rainbow letter highlight */
.rainbow-l { color: #2EC4B6; }
.rainbow-e1 { color: #FFB703; }
.rainbow-a { color: #52B788; }
.rainbow-r { color: #FF5D8F; }
.rainbow-n { color: #8338EC; }
.rainbow-e2 { color: #FF8A00; }
.rainbow-r2 { color: #3A86FF; }
.rainbow-s { color: #E63946; }
.rainbow-excl { color: #FFB703; }

/* Cloud Header Waves & Backgrounds */
.cloud-hero-bg {
  background: linear-gradient(180deg, #FFF6E5 0%, #FFF9EF 65%, #FFFFFF 100%);
  position: relative;
}

.cloud-wave-divider {
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  overflow: hidden;
  line-height: 0;
  z-index: 5;
}

/* Sticky Navbar glass */
.navbar-glass {
  background: rgba(255, 248, 235, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(254, 215, 170, 0.4);
  transition: all 0.3s ease;
}

.nav-link-btn {
  background: transparent;
  color: #334155;
  border: none;
  padding: 0.5rem 0.85rem;
  border-radius: 9999px;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  text-decoration: none;
  white-space: nowrap;
  transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.nav-link-btn:hover {
  color: #EA580C;
  transform: translateY(-2px);
  background-color: rgba(255, 237, 213, 0.5);
}

.nav-link-btn.active {
  color: #C2410C;
  font-weight: 700;
  background-color: #FED7AA;
  box-shadow: 0 2px 6px rgba(234, 88, 12, 0.15);
}

/* Responsive Navbar & Mobile Drawer */
@media (max-width: 1280px) {
  .nav-desktop-links {
    display: none !important;
  }
  .nav-mobile-trigger {
    display: inline-flex !important;
  }
}

.mobile-drawer-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(4px);
  z-index: 99;
  animation: fadeIn 0.2s ease-out;
}

.mobile-menu-pane {
  animation: slideDown 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

/* Paper Note Cards */
.paper-note {
  background: white;
  border-radius: var(--radius-md);
  padding: 1.75rem;
  box-shadow: var(--shadow-md);
  position: relative;
  transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.25s ease;
  border: 2px solid transparent;
}

.paper-note:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.note-yellow { background: #FEF9C3; border-color: #FDE047; }
.note-blue { background: #E0F2FE; border-color: #BAE6FD; }
.note-pink { background: #FCE7F3; border-color: #FBCFE8; }
.note-green { background: #DCFCE7; border-color: #BBF7D0; }
.note-purple { background: #F3E8FF; border-color: #E9D5FF; }

/* Washi Tape Strip */
.washi-tape {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%) rotate(-2deg);
  width: 90px;
  height: 24px;
  background: rgba(255, 225, 93, 0.85);
  border-left: 3px dashed rgba(255, 255, 255, 0.8);
  border-right: 3px dashed rgba(255, 255, 255, 0.8);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
  z-index: 5;
}

.washi-tape-pink {
  background: rgba(255, 175, 204, 0.85);
  transform: translateX(-50%) rotate(2deg);
}

.washi-tape-blue {
  background: rgba(162, 210, 255, 0.85);
  transform: translateX(-50%) rotate(-1deg);
}

/* Buttons */
.btn-primary {
  background: linear-gradient(135deg, #FF9F1C 0%, #FF7B00 100%);
  color: white;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  box-shadow: var(--shadow-button), inset 0 -2px 0 rgba(0,0,0,0.15);
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  text-decoration: none;
}

.btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 20px rgba(255, 123, 0, 0.45);
}

.btn-secondary {
  background: white;
  color: var(--text-dark);
  padding: 0.75rem 1.6rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  border: 2px solid #E2E8F0;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  text-decoration: none;
}

.btn-secondary:hover {
  background: #F8FAFC;
  border-color: #CBD5E1;
  transform: translateY(-2px);
}

.btn-teal {
  background: linear-gradient(135deg, #2EC4B6 0%, #0CB0A9 100%);
  color: white;
  box-shadow: 0 4px 14px rgba(46, 196, 182, 0.35);
  border: none;
  cursor: pointer;
}

.btn-pink {
  background: linear-gradient(135deg, #FF5D8F 0%, #E63946 100%);
  color: white;
  box-shadow: 0 4px 14px rgba(255, 93, 143, 0.35);
  border: none;
  cursor: pointer;
}

/* Video Grid Layout */
.video-grid-container {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1.5rem;
  background: #0F172A;
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  color: white;
}

@media (max-width: 900px) {
  .video-grid-container {
    grid-template-columns: 1fr;
  }
}

/* Grids */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
}

/* Animations */
@keyframes floatSlow {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-10px) rotate(1.5deg); }
}

@keyframes bounceSoft {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

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

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

.font-dyslexic {
  font-family: var(--font-dyslexic) !important;
  letter-spacing: 0.08em;
  line-height: 2.2 !important;
}

/* Low-Bandwidth Mode */
.low-bandwidth-mode img {
  display: none !important;
}
.low-bandwidth-mode .image-fallback-placeholder {
  display: flex !important;
}