/* ==========================================================================
   Readixa 3D Parallax Motion Engine CSS v2.0
   Hardware-accelerated 3D tilt, floating Arabic letters, neon glowing borders,
   Dual-Auth comparison, Specialist Add Program callout, and 15-Session Grid.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS Custom Properties & Property Declarations (Neon & Motion Engine)
   -------------------------------------------------------------------------- */
@property --gradient-angle {
  syntax: "<angle>";
  initial-value: 0deg;
  inherits: false;
}

:root {
  /* Motion Engine Color Palette - Light Mode */
  --readixa-teal: #0D9488;
  --readixa-teal-glow: #00D2A0;
  --readixa-orange: #F97316;
  --readixa-blue: #06B6D4;
  --readixa-purple: #8B5CF6;

  --neon-teal-shadow: rgba(13, 148, 136, 0.35);
  --neon-orange-shadow: rgba(249, 115, 22, 0.35);
  --neon-blue-shadow: rgba(6, 182, 212, 0.35);
  
  --card-3d-bg: rgba(255, 255, 255, 0.88);
  --card-3d-border: rgba(226, 232, 240, 0.8);
  --glass-blur: 16px;
}

[data-theme="dark"] {
  /* Motion Engine Color Palette - Dark Mode */
  --readixa-teal: #14B8A6;
  --readixa-teal-glow: #00E6B0;
  --readixa-orange: #FB923C;
  --readixa-blue: #22D3EE;

  --neon-teal-shadow: rgba(0, 210, 160, 0.45);
  --neon-orange-shadow: rgba(251, 146, 60, 0.45);
  --neon-blue-shadow: rgba(34, 211, 238, 0.45);

  --card-3d-bg: rgba(17, 24, 39, 0.85);
  --card-3d-border: rgba(31, 41, 55, 0.8);
}

/* --------------------------------------------------------------------------
   2. Hardware Acceleration & Base 3D Perspective Rules
   -------------------------------------------------------------------------- */
.gpu-accelerated,
[data-tilt],
[data-parallax],
.parallax-letter,
.tilt-card,
.neon-card,
.remedial-session-card {
  transform: translate3d(0, 0, 0);
  will-change: transform, opacity;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.perspective-container,
.tilt-container {
  perspective: 1000px;
  -webkit-perspective: 1000px;
  transform-style: preserve-3d;
  -webkit-transform-style: preserve-3d;
}

/* --------------------------------------------------------------------------
   3. Multi-Layered 3D Tilt Engine Styles
   -------------------------------------------------------------------------- */
.tilt-card,
[data-tilt] {
  position: relative;
  transform-style: preserve-3d;
  -webkit-transform-style: preserve-3d;
  transition: transform 0.15s ease-out, box-shadow 0.3s ease;
  border-radius: var(--radius-lg, 24px);
  background: var(--card-3d-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--card-3d-border);
  box-shadow: var(--shadow-md, 0 10px 25px -5px rgba(0, 0, 0, 0.1));
}

.tilt-card:hover,
[data-tilt]:hover {
  box-shadow: var(--shadow-lg, 0 20px 35px -10px rgba(0, 0, 0, 0.2)),
              0 0 25px var(--neon-teal-shadow);
}

/* Interactive Depth Layers */
.tilt-layer,
.layer-back {
  transform: translateZ(15px);
  transform-style: preserve-3d;
  -webkit-transform-style: preserve-3d;
}

.layer-middle {
  transform: translateZ(35px);
  transform-style: preserve-3d;
  -webkit-transform-style: preserve-3d;
}

.layer-front {
  transform: translateZ(60px);
  transform-style: preserve-3d;
  -webkit-transform-style: preserve-3d;
}

.layer-pop {
  transform: translateZ(90px);
  transform-style: preserve-3d;
  -webkit-transform-style: preserve-3d;
}

/* Interactive Glare Overlay */
.tilt-glare {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  border-radius: inherit;
  pointer-events: none;
  z-index: 10;
}

.tilt-glare-inner {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 200%;
  height: 200%;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(255, 255, 255, 0.3) 0%, rgba(255, 255, 255, 0) 70%);
  opacity: 0;
  transition: opacity 0.25s ease;
  pointer-events: none;
}

/* --------------------------------------------------------------------------
   4. Floating Parallax Arabic Letters & Holographic Icons
   -------------------------------------------------------------------------- */
.parallax-letter {
  position: absolute;
  font-family: 'Cairo', system-ui, sans-serif;
  font-weight: 900;
  user-select: none;
  pointer-events: none;
  z-index: 2;
  line-height: 1;
  background: linear-gradient(135deg, var(--readixa-teal) 0%, var(--readixa-teal-glow) 50%, var(--readixa-blue) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 8px 16px var(--neon-teal-shadow));
  animation: floatLetter 6s ease-in-out infinite alternate;
  transform-style: preserve-3d;
  -webkit-transform-style: preserve-3d;
}

.parallax-letter.letter-orange {
  background: linear-gradient(135deg, var(--readixa-orange) 0%, #FFB703 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 8px 16px var(--neon-orange-shadow));
  animation-duration: 7s;
  animation-delay: -2s;
}

.parallax-letter.letter-blue {
  background: linear-gradient(135deg, var(--readixa-blue) 0%, var(--readixa-purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 8px 16px var(--neon-blue-shadow));
  animation-duration: 8s;
  animation-delay: -4s;
}

/* Size Variants */
.parallax-letter.letter-sm { font-size: 2.5rem; opacity: 0.55; }
.parallax-letter.letter-md { font-size: 4rem; opacity: 0.75; }
.parallax-letter.letter-lg { font-size: 6.5rem; opacity: 0.88; }
.parallax-letter.letter-xl { font-size: 9.5rem; opacity: 0.95; }

@keyframes floatLetter {
  0% {
    transform: translate3d(0, 0, 20px) rotate(0deg);
  }
  50% {
    transform: translate3d(0, -18px, 45px) rotate(5deg);
  }
  100% {
    transform: translate3d(0, 6px, 30px) rotate(-3deg);
  }
}

/* Holographic Floating Icons */
.holo-icon,
.floating-icon,
.holographic-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: radial-gradient(100% 100% at 0% 0%, rgba(6, 182, 212, 0.2) 0%, rgba(13, 148, 136, 0.08) 100%);
  border: 1px solid rgba(6, 182, 212, 0.4);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--readixa-blue);
  font-size: 1.5rem;
  box-shadow: 0 8px 24px var(--neon-blue-shadow);
  animation: holoPulse 4s ease-in-out infinite alternate;
  transform-style: preserve-3d;
  -webkit-transform-style: preserve-3d;
}

@keyframes holoPulse {
  0% {
    transform: translate3d(0, 0, 10px) scale(1);
    box-shadow: 0 8px 24px var(--neon-blue-shadow);
  }
  100% {
    transform: translate3d(0, -12px, 35px) scale(1.08);
    box-shadow: 0 16px 36px var(--neon-teal-shadow), 0 0 20px rgba(6, 182, 212, 0.6);
  }
}

/* --------------------------------------------------------------------------
   5. Dynamic Neon Glowing Borders (Readixa Palette)
   -------------------------------------------------------------------------- */
.neon-border,
.neon-card {
  position: relative;
  border-radius: var(--radius-lg, 24px);
  background: var(--card-3d-bg);
  z-index: 1;
}

.neon-border::before,
.neon-card::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: calc(var(--radius-lg, 24px) + 2px);
  padding: 2px;
  background: conic-gradient(
    from var(--gradient-angle),
    var(--readixa-teal),
    var(--readixa-teal-glow),
    var(--readixa-blue),
    var(--readixa-orange),
    var(--readixa-teal)
  );
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  animation: rotateGradient 4s linear infinite;
  z-index: -1;
  opacity: 0.85;
  transition: opacity 0.3s ease;
}

.neon-border:hover::before,
.neon-card:hover::before {
  opacity: 1;
  filter: brightness(1.25);
}

.neon-glow-teal {
  box-shadow: 0 0 20px var(--neon-teal-shadow), inset 0 0 15px rgba(13, 148, 136, 0.15);
}

.neon-glow-orange {
  box-shadow: 0 0 20px var(--neon-orange-shadow), inset 0 0 15px rgba(249, 115, 22, 0.15);
}

.neon-glow-blue {
  box-shadow: 0 0 20px var(--neon-blue-shadow), inset 0 0 15px rgba(6, 182, 212, 0.15);
}

@keyframes rotateGradient {
  0% {
    --gradient-angle: 0deg;
  }
  100% {
    --gradient-angle: 360deg;
  }
}

/* --------------------------------------------------------------------------
   6. Dual-Auth Comparison Component Styles
   -------------------------------------------------------------------------- */
.dual-auth-comparison {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 28px;
  margin: 32px 0;
  perspective: 1000px;
  -webkit-perspective: 1000px;
}

.auth-mode-card {
  position: relative;
  padding: 32px 24px;
  border-radius: var(--radius-lg, 24px);
  background: var(--card-3d-bg);
  border: 1.5px solid var(--card-3d-border);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  box-shadow: var(--shadow-md, 0 10px 25px -5px rgba(0,0,0,0.1));
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  transform-style: preserve-3d;
  -webkit-transform-style: preserve-3d;
}

.auth-mode-card.auth-adult {
  border-top: 4px solid var(--readixa-teal);
}

.auth-mode-card.auth-student {
  border-top: 4px solid var(--readixa-orange);
}

.auth-mode-card:hover {
  transform: translateY(-6px) translateZ(20px);
}

.auth-mode-card.auth-adult:hover {
  box-shadow: 0 15px 35px var(--neon-teal-shadow);
}

.auth-mode-card.auth-student:hover {
  box-shadow: 0 15px 35px var(--neon-orange-shadow);
}

.auth-card-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}

.auth-card-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
}

.auth-adult .auth-card-icon {
  background: rgba(13, 148, 136, 0.12);
  color: var(--readixa-teal);
}

.auth-student .auth-card-icon {
  background: rgba(249, 115, 22, 0.12);
  color: var(--readixa-orange);
}

.auth-card-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 9999px;
  font-size: 0.78rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.auth-adult .auth-card-badge {
  background: rgba(13, 148, 136, 0.15);
  color: var(--readixa-teal);
}

.auth-student .auth-card-badge {
  background: rgba(249, 115, 22, 0.15);
  color: var(--readixa-orange);
}

/* Student 6-Digit Child Code Box Display */
.child-code-preview {
  display: flex;
  justify-content: center;
  gap: 8px;
  direction: ltr;
  margin: 18px 0;
}

.child-code-digit {
  width: 42px;
  height: 50px;
  border-radius: 10px;
  border: 2px solid var(--readixa-orange);
  background: rgba(249, 115, 22, 0.06);
  color: var(--readixa-orange);
  font-size: 1.5rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px var(--neon-orange-shadow);
  animation: pulseDigit 2s infinite ease-in-out alternate;
}

.child-code-digit:nth-child(2n) { animation-delay: 0.3s; }
.child-code-digit:nth-child(3n) { animation-delay: 0.6s; }

@keyframes pulseDigit {
  0% { transform: scale(1); }
  100% { transform: scale(1.06); border-color: #FFB703; }
}

/* --------------------------------------------------------------------------
   7. Specialist (+) Add Program Callout Styles
   -------------------------------------------------------------------------- */
.specialist-callout,
.add-program-callout {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 24px 30px;
  border-radius: var(--radius-lg, 24px);
  background: linear-gradient(135deg, rgba(13, 148, 136, 0.08) 0%, rgba(6, 182, 212, 0.08) 100%);
  border: 2px dashed var(--readixa-teal);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  margin: 28px 0;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  transform-style: preserve-3d;
  -webkit-transform-style: preserve-3d;
}

.specialist-callout:hover,
.add-program-callout:hover {
  transform: translateY(-4px) translateZ(25px);
  border-style: solid;
  box-shadow: 0 12px 30px var(--neon-teal-shadow);
}

.callout-content {
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn-add-program {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 24px;
  border-radius: var(--radius-full, 9999px);
  background: linear-gradient(135deg, var(--readixa-teal) 0%, var(--readixa-blue) 100%);
  color: #ffffff;
  font-weight: 700;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  box-shadow: 0 6px 20px var(--neon-teal-shadow);
  transition: all 0.3s ease;
  transform-style: preserve-3d;
  -webkit-transform-style: preserve-3d;
}

.btn-add-program:hover {
  transform: scale(1.05) translateZ(30px);
  box-shadow: 0 10px 28px var(--neon-blue-shadow);
}

.btn-add-program i {
  font-size: 1.1rem;
  transition: transform 0.3s ease;
}

.btn-add-program:hover i {
  transform: rotate(90deg);
}

/* --------------------------------------------------------------------------
   8. 15-Session Remedial Grid Component Styles
   -------------------------------------------------------------------------- */
.remedial-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
  margin: 32px 0;
  perspective: 1000px;
  -webkit-perspective: 1000px;
}

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

@media (max-width: 640px) {
  .remedial-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
}

.remedial-session-card {
  position: relative;
  padding: 20px 16px;
  border-radius: var(--radius-md, 16px);
  background: var(--card-3d-bg);
  border: 1.5px solid var(--card-3d-border);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  text-align: center;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  transform-style: preserve-3d;
  -webkit-transform-style: preserve-3d;
  cursor: pointer;
}

.remedial-session-card:hover {
  transform: translateY(-6px) translateZ(30px);
}

/* Status States */
.remedial-session-card.session-completed {
  border-color: var(--readixa-teal);
  background: linear-gradient(180deg, rgba(13, 148, 136, 0.08) 0%, var(--card-3d-bg) 100%);
}

.remedial-session-card.session-completed:hover {
  box-shadow: 0 10px 25px var(--neon-teal-shadow);
}

.remedial-session-card.session-active {
  border-color: var(--readixa-orange);
  background: linear-gradient(180deg, rgba(249, 115, 22, 0.12) 0%, var(--card-3d-bg) 100%);
  animation: activeSessionPulse 3s infinite ease-in-out alternate;
}

.remedial-session-card.session-active:hover {
  box-shadow: 0 10px 25px var(--neon-orange-shadow);
}

.remedial-session-card.session-locked {
  opacity: 0.65;
  border-color: var(--card-3d-border);
  cursor: not-allowed;
}

@keyframes activeSessionPulse {
  0% { box-shadow: 0 0 12px var(--neon-orange-shadow); }
  100% { box-shadow: 0 0 25px var(--neon-orange-shadow); }
}

.session-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  font-weight: 800;
  font-size: 1rem;
  margin-bottom: 10px;
}

.session-completed .session-number {
  background: var(--readixa-teal);
  color: #ffffff;
}

.session-active .session-number {
  background: var(--readixa-orange);
  color: #ffffff;
}

.session-locked .session-number {
  background: var(--card-3d-border);
  color: var(--text-muted, #64748b);
}

.session-title {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-main, #0f172a);
  margin-bottom: 6px;
  line-height: 1.3;
}

.session-status-icon {
  font-size: 0.95rem;
}

.session-completed .session-status-icon { color: var(--readixa-teal); }
.session-active .session-status-icon { color: var(--readixa-orange); }
.session-locked .session-status-icon { color: var(--text-muted, #64748b); }

/* --------------------------------------------------------------------------
   9. Scroll Reveal Animations (IntersectionObserver Helpers)
   -------------------------------------------------------------------------- */
.animate-on-scroll,
.fade-up,
.zoom-in,
.cascading-reveal > * {
  opacity: 0;
  transition: opacity 0.6s ease-out, transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.fade-up {
  transform: translate3d(0, 35px, 0);
}

.zoom-in {
  transform: scale3d(0.88, 0.88, 1);
}

.animate-on-scroll.is-visible,
.fade-up.is-visible,
.zoom-in.is-visible,
.cascading-reveal.is-visible > *,
.animate-on-scroll.animated,
.fade-up.animated,
.zoom-in.animated {
  opacity: 1;
  transform: translate3d(0, 0, 0) scale3d(1, 1, 1);
}