/**
 * MG COPTIC - Universal Skeleton Shimmer Loading & Minimal Spinner
 * Industry-standard skeleton architecture matching Duolingo, Apple & YouTube.
 * Eliminates blank screens & content jumping with smooth ivory-gold shimmer wave.
 */

#mg-preloader {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  background-color: #F8EFE0;
  z-index: 99999999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  font-family: 'Cairo', system-ui, -apple-system, sans-serif;
  direction: rtl;
  opacity: 1;
  visibility: visible;
  transition: opacity 0.38s cubic-bezier(0.4, 0, 0.2, 1), visibility 0.38s ease;
  user-select: none;
  -webkit-user-select: none;
  padding: 14px 16px 40px;
  box-sizing: border-box;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
}

#mg-preloader.loaded {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

/* Master Skeleton Container */
.mg-skeleton-screen {
  max-width: 540px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
  animation: mgSkelFadeIn 0.3s ease-out;
}

@keyframes mgSkelFadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 1. Minimal Spinner & Live Status Indicator */
.mg-skeleton-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 253, 249, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(217, 201, 160, 0.45);
  border-radius: 999px;
  padding: 8px 16px;
  box-shadow: 0 4px 16px rgba(38, 25, 18, 0.04);
  margin-bottom: 2px;
}

.mg-skeleton-status-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}

.mg-minimal-spinner {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2.5px solid rgba(140, 36, 48, 0.15);
  border-top-color: #8C2430;
  animation: mgSpin 0.75s linear infinite;
  flex-shrink: 0;
}

@keyframes mgSpin {
  to { transform: rotate(360deg); }
}

.mg-skeleton-status-title {
  font-size: 0.88rem;
  font-weight: 700;
  color: #261912;
  letter-spacing: -0.2px;
}

.mg-skeleton-logo-badge {
  display: flex;
  align-items: center;
  gap: 6px;
}

.mg-skeleton-logo-badge img {
  width: 22px;
  height: 22px;
  object-fit: contain;
}

.mg-skeleton-brand-text {
  font-size: 0.82rem;
  font-weight: 800;
  color: #8C2430;
  letter-spacing: 0.5px;
}

/* 2. Shimmer Effect Core (Ivory & Gold Shimmer Wave) */
.mg-skeleton-shimmer,
.lb-skeleton-shimmer {
  background: linear-gradient(90deg, rgba(217, 201, 160, 0.28) 0%, rgba(255, 255, 255, 0.75) 50%, rgba(217, 201, 160, 0.28) 100%);
  background-size: 200% 100%;
  animation: mgSkeletonShimmer 1.5s infinite linear;
  border-radius: 8px;
}

@keyframes mgSkeletonShimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

/* 3. Skeleton Topbar Mockup */
.mg-skel-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 2px 8px;
}

.mg-skel-topbar-chips {
  display: flex;
  gap: 8px;
}

/* 4. Skeleton Greeting Section */
.mg-skel-greeting {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 2px 4px;
}

.mg-skel-greeting-lines {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

/* 5. Skeleton 3 Stat Cards Row */
.mg-skel-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.mg-skel-stat-box {
  background: #FFFDF9;
  border: 1px solid rgba(217, 201, 160, 0.45);
  border-radius: 18px;
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  box-shadow: 0 4px 14px rgba(38, 25, 18, 0.03);
}

/* 6. Skeleton Hero Lesson Banner Card */
.mg-skel-hero-card {
  background: #FFFDF9;
  border: 1px solid rgba(217, 201, 160, 0.5);
  border-radius: 22px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: 0 6px 20px rgba(38, 25, 18, 0.04);
}

.mg-skel-hero-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 6px;
}

/* 7. Skeleton 7-Day Streak Challenge Card */
.mg-skel-streak-card {
  background: #FAF6E9;
  border: 1.5px solid #EAE0C8;
  border-radius: 20px;
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  box-shadow: 0 4px 14px rgba(38, 25, 18, 0.03);
}

.mg-skel-streak-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.mg-skel-streak-days-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 8px;
  background: rgba(234, 224, 200, 0.25);
  border-radius: 16px;
}

.mg-skel-streak-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 10px;
  border-top: 1px dashed rgba(217, 201, 160, 0.5);
}

/* 8. Skeleton Today's Goal Card */
.mg-skel-goal-card {
  background: #FFFDF9;
  border: 1px solid #EAE0C8;
  border-radius: 18px;
  padding: 14px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: 0 4px 14px rgba(38, 25, 18, 0.03);
}

/* Network Slow Notice */
.mg-slow-notice {
  margin-top: 4px;
  font-size: 0.8rem;
  font-weight: 700;
  color: #8C2438;
  background: rgba(107, 21, 48, 0.08);
  border: 1px solid rgba(184, 137, 46, 0.25);
  padding: 5px 12px;
  border-radius: 20px;
  animation: mgFadeIn 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  align-self: center;
}

@keyframes mgFadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Error Box for Offline or Heavy Timeout */
.mg-loader-error {
  display: none;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 24px 20px;
  width: 100%;
  max-width: 420px;
  margin: 40px auto;
  background: #FAF4E9;
  border-radius: 20px;
  box-shadow: 0 10px 25px rgba(38, 25, 18, 0.08);
  border: 1.5px solid #E8DCBE;
  box-sizing: border-box;
}

.mg-loader-error.active {
  display: flex;
  animation: mgFadeIn 0.3s ease;
}

.mg-loader-error .error-icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(107, 21, 48, 0.08);
  color: #6B1530;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
}

.mg-loader-error h3 {
  font-size: 1.15rem;
  font-weight: 800;
  color: #261912;
  margin: 0 0 6px;
}

.mg-loader-error p {
  font-size: 0.9rem;
  font-weight: 500;
  color: #5A4A3E;
  margin: 0 0 16px;
  line-height: 1.5;
}

.mg-btn-retry {
  background: #6B1530;
  color: #FFFFFF;
  border: none;
  padding: 12px 28px;
  border-radius: 14px;
  font-size: 0.95rem;
  font-weight: 800;
  cursor: pointer;
  font-family: 'Cairo', sans-serif;
  box-shadow: 0 3px 0 #4A0E21;
  transition: all 0.12s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.mg-btn-retry:active {
  transform: translateY(2px);
  box-shadow: 0 1px 0 #4A0E21;
}

/* Universal Page Skeleton Container (Responsive & Centered) */
.mg-page-skeleton {
  display: flex;
  flex-direction: column;
  gap: 16px;
  width: 100%;
  max-width: 540px;
  margin: 0 auto;
  padding: 8px 4px 32px;
  box-sizing: border-box;
  animation: mgSkelFadeIn 0.3s ease-out;
}

.home-skeleton-wrapper {
  display: flex;
  flex-direction: column;
  gap: 16px;
  width: 100%;
}

/* ==========================================================================
   2. Learn Path Skeleton (مسار التعلّم التفاعلي)
   ========================================================================== */
.mg-skel-learn-unit {
  background: #FFFDF9;
  border: 1.5px solid rgba(217, 201, 160, 0.55);
  border-radius: 20px;
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-shadow: 0 4px 16px rgba(38, 25, 18, 0.03);
}

.mg-skel-path-track {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 22px;
  padding: 24px 0 32px;
  width: 100%;
}

.mg-skel-path-track::before {
  content: '';
  position: absolute;
  top: 10px;
  bottom: 10px;
  width: 4px;
  background: repeating-linear-gradient(to bottom, rgba(217, 201, 160, 0.4) 0px, rgba(217, 201, 160, 0.4) 8px, transparent 8px, transparent 16px);
  z-index: 1;
}

.mg-skel-path-node-row {
  position: relative;
  z-index: 2;
  display: flex;
  width: 100%;
  max-width: 320px;
}

.mg-skel-path-node-row.pos-right { justify-content: flex-end; padding-left: 20px; }
.mg-skel-path-node-row.pos-center { justify-content: center; }
.mg-skel-path-node-row.pos-left { justify-content: flex-start; padding-right: 20px; }

.mg-skel-path-circle {
  width: 58px;
  height: 58px;
  border-radius: 50%;
  box-shadow: 0 4px 12px rgba(38, 25, 18, 0.06);
}

.mg-skel-path-chest {
  width: 74px;
  height: 64px;
  border-radius: 18px;
}

/* ==========================================================================
   3. Settings Page Skeleton (الإعدادات والملف الشخصي)
   ========================================================================== */
.mg-skel-settings-card {
  background: #FFFDF9;
  border: 1px solid rgba(217, 201, 160, 0.5);
  border-radius: 20px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  box-shadow: 0 4px 14px rgba(38, 25, 18, 0.03);
}

.mg-skel-profile-top {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 6px 0;
}

.mg-skel-settings-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

/* ==========================================================================
   4. Alphabet Page Skeleton (جدول الحروف القبطية)
   ========================================================================== */
.mg-skel-alphabet-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  width: 100%;
}

@media (max-width: 480px) {
  .mg-skel-alphabet-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
  }
}

.mg-skel-alphabet-card {
  background: #FFFDF9;
  border: 1px solid rgba(217, 201, 160, 0.45);
  border-radius: 16px;
  height: 90px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 6px;
  box-shadow: 0 3px 10px rgba(38, 25, 18, 0.02);
}

/* ==========================================================================
   5. Vocab & Calendar Page Skeleton (المعجم والتقويم)
   ========================================================================== */
.mg-skel-vocab-chips {
  display: flex;
  gap: 8px;
  overflow-x: hidden;
  padding: 2px 0 6px;
}

.mg-skel-vocab-card {
  background: #FFFDF9;
  border: 1px solid rgba(217, 201, 160, 0.5);
  border-radius: 18px;
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  box-shadow: 0 4px 12px rgba(38, 25, 18, 0.03);
}

/* ==========================================================================
   6. Competitions & Quiz Page Skeleton (المسابقات والتحديات)
   ========================================================================== */
.mg-skel-comp-modes {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 100%;
}

.mg-skel-comp-card {
  background: #FFFDF9;
  border: 1px solid rgba(217, 201, 160, 0.5);
  border-radius: 18px;
  padding: 16px 18px;
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: 0 4px 14px rgba(38, 25, 18, 0.03);
}