/* ========== FONTS & ROOT VARIABLES ========== */
@import url("https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800&display=swap");

:root {
  --primary: #4338ca;
  --secondary: #ffb703;
  --dark-blue: #1e1b4b;
  --light-bg: #f8f9ff;
}

body {
  font-family: "Poppins", sans-serif;
  background-color: #ffffff;
  color: #1e1b4b;
}

/* ---- NAVBAR ---- */
.navbar {
  background: rgba(255, 255, 255, 0.95) !important;
  backdrop-filter: blur(10px);
  border-bottom: 1px solid #e5e7eb;
}
.nav-link.active,
.nav-link:hover {
  color: var(--primary) !important;
}

/* ---- HERO ANIMATIONS ---- */
@keyframes glowPulse {
  0%,
  100% {
    filter: drop-shadow(0 0 15px rgba(67, 56, 202, 0.5));
  }
  50% {
    filter: drop-shadow(0 0 25px rgba(67, 56, 202, 0.8));
  }
}
@keyframes floatBook {
  0%,
  100% {
    transform: translate(-50%, 0px);
  }
  50% {
    transform: translate(-50%, -20px);
  }
}
.floating-book {
  animation: floatBook 4s ease-in-out infinite;
}

/* ---- CATEGORY CARDS ---- */
.category-card {
  transition: all 0.2s ease;
}
.category-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 15px 30px rgba(67, 56, 202, 0.1) !important;
}

/* ---- PRODUCT CARDS (New Arrivals & All Books) ---- */
.product-card {
  border-radius: 20px;
  overflow: hidden;
  transition:
    transform 0.3s,
    box-shadow 0.3s;
}
.product-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

/* ---- BUTTONS ---- */
.btn-primary {
  background-color: var(--dark-blue) !important;
  border-color: var(--dark-blue) !important;
  border-radius: 50px;
  padding: 10px 25px;
  font-weight: 600;
  transition: all 0.3s;
}
.btn-primary:hover {
  background-color: #312e81 !important;
  transform: scale(1.02);
}
.btn-outline-primary {
  border-color: var(--primary);
  color: var(--primary);
}
.btn-outline-primary:hover {
  background-color: var(--primary);
  color: #fff;
}

.text-warning {
  color: var(--secondary) !important;
}

/* ---- DARK MODE (complete coverage) ---- */
[data-bs-theme="dark"] body {
  background-color: #1e1e2f !important;
  color: #e0e0e0;
}
[data-bs-theme="dark"] .card {
  background-color: #2a2a3d !important;
  color: #e0e0e0;
}
[data-bs-theme="dark"] .card .text-muted {
  color: #ccc !important;
}
[data-bs-theme="dark"] .bg-light {
  background-color: #333 !important;
}
[data-bs-theme="dark"] .hero-section {
  background: linear-gradient(135deg, #2a2a3d 0%, #1e1e2f 100%) !important;
}
[data-bs-theme="dark"] .about-section {
  background-color: #2a2a3d !important;
}
[data-bs-theme="dark"] .navbar {
  background: rgba(42, 42, 61, 0.95) !important;
}
[data-bs-theme="dark"] .nav-link {
  color: #e0e0e0 !important;
}
[data-bs-theme="dark"] .nav-link.active,
[data-bs-theme="dark"] .nav-link:hover {
  color: var(--primary) !important;
}
[data-bs-theme="dark"] .btn-outline-primary {
  border-color: #818cf8;
  color: #818cf8;
}
[data-bs-theme="dark"] .btn-outline-primary:hover {
  background-color: #818cf8;
  color: #fff;
}

/* Dark mode – badges */
[data-bs-theme="dark"] .badge.bg-light {
  background-color: #3a3a4d !important;
  color: #e0e0e0 !important;
}
/* Dark mode – form inputs & search bar */
[data-bs-theme="dark"] .form-control {
  background-color: #3a3a4d !important;
  color: #fff !important;
  border-color: #555;
}
[data-bs-theme="dark"] .form-control::placeholder {
  color: #aaa;
}
[data-bs-theme="dark"] .input-group .btn {
  background-color: #1e1b4b !important;
  border-color: #1e1b4b !important;
}
/* Dark mode – carousel controls */
[data-bs-theme="dark"] .carousel-control-prev-icon,
[data-bs-theme="dark"] .carousel-control-next-icon {
  background-color: #555 !important;
  border-radius: 50%;
  background-size: 60%;
}
/* Dark mode – pagination */
[data-bs-theme="dark"] .pagination .page-link {
  background-color: #2a2a3d;
  color: #e0e0e0;
  border-color: #444;
}
[data-bs-theme="dark"] .pagination .active .page-link {
  background-color: #4338ca;
  border-color: #4338ca;
  color: #fff;
}

/* ---- SCROLL FADE ---- */
.scroll-fade {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease;
}
.scroll-fade.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ==============================
   3D BOOK CARD (PREMIUM STYLE)
   ============================== */
.book-3d-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 15px 0;
  perspective: 1200px;
}

.book-3d {
  position: relative;
  width: 140px;
  height: 190px;
  transform-style: preserve-3d;
  transform: rotateY(-15deg) rotateX(5deg);
  transition: transform 0.3s ease;
  cursor: pointer;
}

.book-3d:hover {
  transform: rotateY(-5deg) rotateX(0deg) scale(1.03);
}

.book-front {
  position: absolute;
  width: 100%;
  height: 100%;
  background: #fff;
  border-radius: 4px 8px 8px 4px;
  overflow: hidden;
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.2);
  z-index: 3;
}

.book-front img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.book-spine {
  position: absolute;
  top: 0;
  left: -12px;
  width: 12px;
  height: 100%;
  background: linear-gradient(90deg, #bbb, #ddd 30%, #aaa 70%, #999);
  border-radius: 8px 0 0 8px;
  z-index: 1;
  box-shadow: inset -2px 0 4px rgba(0, 0, 0, 0.2);
}

.book-pages {
  position: absolute;
  bottom: -8px;
  left: -12px;
  width: calc(100% + 12px);
  height: 8px;
  background: repeating-linear-gradient(
    90deg,
    #f5f0e8 0px,
    #f5f0e8 3px,
    #e8e0d0 3px,
    #e8e0d0 4px
  );
  border-radius: 0 0 4px 4px;
  z-index: 0;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}

.book-shadow {
  position: absolute;
  bottom: -12px;
  left: 5%;
  width: 90%;
  height: 20px;
  background: radial-gradient(
    ellipse at center,
    rgba(0, 0, 0, 0.35),
    transparent
  );
  transform: rotateX(80deg);
  z-index: -1;
}

/* ---- RESPONSIVE TWEAKS ---- */
@media (max-width: 768px) {
  .display-3 {
    font-size: 2.5rem;
  }
  .floating-book {
    font-size: 4rem !important;
  }
  .glowing-bulb,
  .stacked-books {
    font-size: 3rem !important;
  }

  .book-3d {
    width: 120px;
    height: 165px;
  }
  .book-spine {
    left: -10px;
    width: 10px;
  }
  .book-pages {
    bottom: -6px;
    height: 6px;
    left: -10px;
    width: calc(100% + 10px);
  }
}

/* ========== EXTRA SMALL DEVICES (Phones, 576px and below) ========== */
@media (max-width: 576px) {
  body {
    font-size: 0.9rem;
  }
  .navbar-brand span {
    font-size: 0.95rem;
  }
  .navbar .btn {
    padding: 0.3rem 0.7rem;
    font-size: 0.75rem;
  }
  .navbar .nav-link {
    font-size: 0.9rem;
  }

  .category-card {
    padding: 1rem 0.5rem !important;
    border-radius: 12px;
  }
  .category-icon {
    font-size: 1.6rem !important;
  }
  .category-card h6 {
    font-size: 0.8rem !important;
  }

  .product-card .book-3d-wrapper {
    height: 130px !important;
  }
  .book-3d {
    width: 110px;
    height: 150px;
  }
  .book-spine {
    left: -8px;
    width: 8px;
  }
  .book-pages {
    bottom: -5px;
    height: 5px;
    left: -8px;
    width: calc(100% + 8px);
  }
  .product-card .card-body h6 {
    font-size: 0.75rem !important;
  }
  .product-card .card-body .badge {
    font-size: 0.6rem !important;
  }
  .product-card .card-body .text-warning {
    font-size: 0.65rem !important;
  }
  .product-card .card-body .small {
    font-size: 0.6rem !important;
  }

  .btn-primary,
  .btn-outline-primary,
  .btn-outline-secondary,
  .btn-success,
  .btn-danger {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
  }

  .pagination .page-link {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
  }

  .progress-glass-card {
    padding: 15px;
  }
  .progress-top-icons {
    gap: 10px;
  }
  .circular-progress-container {
    width: 90px;
    height: 90px;
  }
  .progress-ring {
    width: 90px;
    height: 90px;
  }
  .progress-text {
    font-size: 18px;
  }
  .stat-item {
    font-size: 0.7rem;
  }
  .flying-files .pdf-file-icon {
    font-size: 18px;
  }
}

/* ====================================
   PREMIUM GLASSMORPHISM PROGRESS CARD
   ==================================== */
.progress-glass-card {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 24px;
  padding: 25px;
  text-align: center;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.1);
  margin: 20px 0;
}
.progress-top-icons {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 30px;
  margin-bottom: 20px;
}
.laptop-icon,
.server-icon {
  position: relative;
}
.flying-files .pdf-file-icon {
  position: absolute;
  left: 50%;
  top: 50%;
  font-size: 24px;
  transform: translate(-50%, -50%);
  animation: flyToServer 1.5s infinite ease-in-out;
  opacity: 0;
}
.delay1 {
  animation-delay: 0.5s;
}
.delay2 {
  animation-delay: 1s;
}
@keyframes flyToServer {
  0% {
    left: 50%;
    top: 50%;
    opacity: 0;
    transform: translate(-50%, -50%) rotate(0deg);
  }
  30% {
    opacity: 1;
  }
  100% {
    left: calc(100% + 20px);
    top: 10%;
    opacity: 0;
    transform: translate(0, 0) rotate(20deg);
  }
}
.connection-lines {
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, transparent, #4338ca, transparent);
  animation: pulseLine 1s infinite;
}
@keyframes pulseLine {
  0%,
  100% {
    opacity: 0.3;
    transform: scaleX(0.8);
  }
  50% {
    opacity: 1;
    transform: scaleX(1.2);
  }
}
.server-pulse {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 40px;
  height: 40px;
  background: rgba(16, 185, 129, 0.2);
  border-radius: 50%;
  animation: serverGlow 0.8s infinite alternate;
}
@keyframes serverGlow {
  from {
    box-shadow: 0 0 10px rgba(16, 185, 129, 0.4);
    transform: translate(-50%, -50%) scale(0.9);
  }
  to {
    box-shadow: 0 0 25px rgba(16, 185, 129, 0.8);
    transform: translate(-50%, -50%) scale(1.2);
  }
}
.circular-progress-container {
  position: relative;
  width: 120px;
  height: 120px;
  margin: 0 auto 20px;
}
.progress-ring .ring-fg {
  stroke-dasharray: 327;
  stroke-dashoffset: 327;
  transition: stroke-dashoffset 0.2s ease;
}
.progress-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 24px;
  font-weight: 800;
  color: #1e1b4b;
}
.progress-stats {
  display: flex;
  justify-content: space-around;
  margin-bottom: 10px;
}
.stat-item {
  display: flex;
  flex-direction: column;
  font-size: 0.85rem;
}
.stat-label {
  color: #6b7280;
}
.stat-value {
  font-weight: 600;
  color: #1e1b4b;
}
.progress-status-text {
  font-weight: 600;
  color: #4338ca;
  min-height: 20px;
}

/* Dark mode adjustments for the progress card */
[data-bs-theme="dark"] .progress-glass-card {
  background: rgba(30, 30, 47, 0.75) !important;
  border-color: rgba(255, 255, 255, 0.1) !important;
}
[data-bs-theme="dark"] .progress-text,
[data-bs-theme="dark"] .stat-value {
  color: #fff !important;
}
[data-bs-theme="dark"] .progress-status-text {
  color: #818cf8 !important;
}
[data-bs-theme="dark"] .ring-bg {
  stroke: #3a3a4d !important;
}
[data-bs-theme="dark"] .connection-lines {
  background: linear-gradient(90deg, transparent, #818cf8, transparent);
}

/* =============================================
   SAFE ANIMATION PERFORMANCE (FIXED)
   ============================================= */

/* 
   ✅ FIX: Removed aggressive will-change — replaced with safer GPU hints.
   was: will-change: transform, box-shadow on .product-card, .category-card,
   .book-3d, .book-card, .btn, .btn-primary, .btn-outline-primary, 
   form button[type="submit"]
   
   will-change was causing GPU memory overload on mobile,
   conflicting with AOS scroll animations after Render deployment.
*/
.product-card,
.category-card,
.book-3d,
.book-card,
.btn,
.btn-primary,
.btn-outline-primary,
form button[type="submit"] {
  backface-visibility: hidden;
  transform: translateZ(0); /* Safer GPU hint — lets browser decide */
}

/* Only apply will-change on hover when actually needed */
.product-card:hover,
.category-card:hover {
  will-change: transform;
  transition:
    transform 0.3s ease,
    box-shadow 0.3s ease;
}

/* 
   ⚠️ FIX: content-visibility rules temporarily disabled —
   was causing page content to not render after loader disappeared.
   Uncomment after verifying rendering is stable.
*/
/*
section,
footer,
main > .container,
#reviews,
#discussion,
.container .row > .col-12:not(:first-child) {
    content-visibility: auto;
    contain-intrinsic-size: 500px;
}
*/

/* Heavy containers get containment */
.book-3d-wrapper,
.progress-glass-card,
.modal-content {
  contain: layout style paint;
}

/* Smooth scrolling with hardware acceleration */
html {
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
}

/* Instant touch response on mobile */
a,
button,
.btn,
[role="button"],
.dropdown-toggle,
input,
select,
textarea {
  touch-action: manipulation;
}

/* Optimize font rendering */
body {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeSpeed;
}

/* Prevent layout shifts from images */
img[loading="lazy"] {
  aspect-ratio: attr(width) / attr(height);
  background: #f3f4f6;
}

/* ========== BOOK COVER FULL RESPONSIVE FIX ========== */
/* Grid cards mein 3D effect hatakar flat full cover dikhao */
.book-3d-wrapper {
  max-height: none !important;
  height: auto !important;
  padding: 8px !important;
  perspective: none !important;
}

.book-3d {
  width: 100% !important;
  max-width: 150px;
  height: auto !important;
  aspect-ratio: 2 / 3;
  transform: none !important;
}

.book-front {
  position: relative !important;
  width: 100% !important;
  height: 100% !important;
  border-radius: 10px !important;
}

.book-front img {
  width: 100% !important;
  height: 100% !important;
  object-fit: cover;
  object-position: center;
  display: block;
  border-radius: 10px;
}

.book-spine,
.book-pages,
.book-shadow {
  display: none !important;
}

/* Book cover outer ko bhi clean karo */
.book-cover-outer {
  height: auto !important;
  min-height: 0 !important;
  overflow: visible !important;
  padding: 4px !important;
}

/* Mobile par aur chhota, but full dikhe */
@media (max-width: 576px) {
  .book-3d-wrapper {
    padding: 4px !important;
  }
  .book-3d {
    max-width: 110px;
  }
}
/* ================== CONSISTENT BOOK COVER BOX ================== */
img[src*="/covers/"],
.book-cover,
.book-card img,
.card-img-top,
.related-book-cover,
#coverThumb {
  width: 100%;
  height: 220px;
  object-fit: cover;
  object-position: center;
  display: block;
  border-radius: 12px 12px 0 0;
  background: #f1f5f9;
}

@media (max-width: 576px) {
  img[src*="/covers/"],
  .book-cover,
  .book-card img,
  .card-img-top,
  .related-book-cover,
  #coverThumb {
    height: 180px;
  }
}
.site-footer [data-aos] {
  opacity: 0;
  transform: translateY(20px);
  transition-property: opacity, transform;
  transition-duration: 0.6s;
  transition-timing-function: ease;
}

.site-footer [data-aos].aos-animate {
  opacity: 1;
  transform: translateY(0);
}