/* 🚀 واجهة فضائية حديثة - أكاديمي بلس */
:root {
  /* الألوان الفضائية الحديثة */
  --space-primary: #1e2139;
  --space-secondary: #2a2d5a;
  --space-accent: #6366f1;
  --space-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --space-purple: #8b5cf6;
  --space-cyan: #06b6d4;
  --space-pink: #ec4899;
  --space-green: #10b981;
  --space-yellow: #f59e0b;
  
  /* الألوان المساعدة */
  --space-bg-primary: #0f0f23;
  --space-bg-secondary: #1a1b3a;
  --space-bg-glass: rgba(255, 255, 255, 0.05);
  --space-text-primary: #ffffff;
  --space-text-secondary: #94a3b8;
  --space-text-muted: #64748b;
  
  /* التأثيرات */
  --space-glow: 0 0 20px rgba(99, 102, 241, 0.3);
  --space-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
  --space-border-radius: 16px;
  
  /* الانيميشن - محسن للهواتف */
  --space-transition: all 0.3s ease;
  
  /* Compatibility with old variable names */
  --primary-color: var(--space-primary);
  --secondary-color: var(--space-accent);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Cairo', 'Segoe UI', sans-serif;
}

/* تدرج فضائي محسن للهواتف */
@keyframes spaceAnimation {
  0% { background-position: 0% 50%; }
  100% { background-position: 100% 50%; }
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-20px); }
}

@keyframes glow {
  0%, 100% { box-shadow: 0 0 5px rgba(99, 102, 241, 0.5); }
  50% { box-shadow: 0 0 20px rgba(99, 102, 241, 0.8), 0 0 30px rgba(139, 92, 246, 0.3); }
}

@keyframes slideInFromLeft {
  0% { transform: translateX(-100%); opacity: 0; }
  100% { transform: translateX(0); opacity: 1; }
}

@keyframes slideInFromRight {
  0% { transform: translateX(100%); opacity: 0; }
  100% { transform: translateX(0); opacity: 1; }
}

@keyframes fadeInUp {
  0% { transform: translateY(30px); opacity: 0; }
  100% { transform: translateY(0); opacity: 1; }
}

body {
  background: var(--space-bg-primary);
  /* خلفية مبسطة للهواتف */
  background-image: 
    radial-gradient(circle at 50% 50%, rgba(120, 119, 198, 0.05) 0%, transparent 70%);
  color: var(--space-text-primary);
  line-height: 1.6;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* تفعيل الخلفية المتحركة فقط للشاشات الكبيرة */
@media (min-width: 768px) and (prefers-reduced-motion: no-preference) {
  body {
    background-image: 
      radial-gradient(circle at 20% 50%, rgba(120, 119, 198, 0.1) 0%, transparent 50%),
      radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.1) 0%, transparent 50%),
      radial-gradient(circle at 40% 80%, rgba(120, 219, 255, 0.1) 0%, transparent 50%);
    background-size: 200% 200%;
    animation: spaceAnimation 30s ease infinite;
  }
}

/* نجوم ثابتة للهواتف، متحركة للشاشات الكبيرة */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    radial-gradient(1px 1px at 20px 30px, #fff, transparent),
    radial-gradient(1px 1px at 130px 80px, #fff, transparent);
  background-repeat: repeat;
  background-size: 200px 100px;
  opacity: 0.05;
  z-index: -1;
  pointer-events: none;
}

@media (min-width: 768px) and (prefers-reduced-motion: no-preference) {
  body::before {
    background-image: 
      radial-gradient(2px 2px at 20px 30px, #fff, transparent),
      radial-gradient(2px 2px at 40px 70px, #fff, transparent),
      radial-gradient(1px 1px at 90px 40px, #fff, transparent),
      radial-gradient(1px 1px at 130px 80px, #fff, transparent),
      radial-gradient(2px 2px at 160px 30px, #fff, transparent);
    animation: spaceAnimation 60s linear infinite;
    opacity: 0.1;
  }
}


/* 🏠 الحاوية الرئيسية */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem;
  position: relative;
  z-index: 1;
}

/* 🔥 الهيدر الفضائي */
.header {
  background: linear-gradient(135deg, var(--space-primary) 0%, var(--space-secondary) 100%);
  padding: 2rem;
  border-radius: 0 0 var(--space-border-radius) var(--space-border-radius);
  box-shadow: var(--space-shadow);
  position: relative;
  overflow: hidden;
  animation: fadeInUp 0.8s ease-out;
}

/* تأثيرات محسنة للشاشات الكبيرة فقط */
@media (min-width: 768px) and (prefers-reduced-motion: no-preference) {
  .header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.05), transparent);
    animation: float 8s ease-in-out infinite;
    pointer-events: none;
  }
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
  z-index: 2;
}

.header h2 {
  font-size: 2.5rem;
  font-weight: 800;
  background: linear-gradient(45deg, #fff, #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* تأثير الوهج للشاشات الكبيرة فقط */
@media (min-width: 768px) and (prefers-reduced-motion: no-preference) {
  .header h2 {
    text-shadow: 0 0 30px rgba(167, 139, 250, 0.3);
    animation: glow 4s ease-in-out infinite;
  }
}

.header p {
  color: var(--space-text-secondary);
  font-size: 1.2rem;
  margin-top: 0.5rem;
  animation: slideInFromLeft 1s ease-out 0.3s both;
}

.header-icons {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  animation: slideInFromRight 1s ease-out 0.5s both;
}

.settings-circle,
.profile-circle {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  text-decoration: none;
  transition: var(--space-transition);
  position: relative;
  overflow: hidden;
}

.settings-circle {
  background: var(--space-bg-glass);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--space-text-primary);
}

.settings-circle:hover {
  transform: scale(1.1) rotate(90deg);
  box-shadow: var(--space-glow);
}

.profile-circle {
  border: 3px solid var(--space-accent);
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.4);
}

.profile-circle:hover {
  transform: scale(1.1);
  box-shadow: 0 0 30px rgba(99, 102, 241, 0.6);
}

.profile-circle img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

/* 🎯 اختيار نوع الدراسة والسنة */
.year-selection {
  margin: 3rem auto;
  max-width: 500px;
  text-align: center;
  animation: fadeInUp 0.8s ease-out;
}

.year-selection__title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--space-text-primary);
  margin-bottom: 2rem;
  background: linear-gradient(45deg, var(--space-accent), var(--space-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.year-selection__buttons {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.year-btn {
  flex: 1;
  min-width: 140px;
  padding: 1rem 2rem;
  font-size: 1.1rem;
  font-weight: 600;
  background: var(--space-primary) !important;
  backdrop-filter: blur(10px);
  color: var(--space-text-primary) !important;
  border: 2px solid rgba(99, 102, 241, 0.3);
  border-radius: var(--space-border-radius);
  cursor: pointer;
  transition: var(--space-transition);
  position: relative;
  overflow: hidden;
}

.year-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

.year-btn:hover::before {
  left: 100%;
}

.year-btn:hover {
  transform: translateY(-3px);
  border-color: var(--space-accent);
  box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
}

.year-btn.active {
  background: linear-gradient(135deg, var(--space-accent), var(--space-purple));
  border-color: transparent;
  color: white;
  box-shadow: 0 10px 30px rgba(99, 102, 241, 0.4);
  animation: glow 2s ease-in-out infinite;
}

/* 🦭 خطوات التنقل */
.navigation-steps {
  display: flex;
  gap: 1.5rem;
  margin: 3rem 0;
  flex-wrap: wrap;
  justify-content: center;
  animation: fadeInUp 1s ease-out 0.2s both;
}

.step-item {
  padding: 1rem 2rem;
  border-radius: 25px;
  background: var(--space-bg-glass);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  cursor: pointer;
  transition: var(--space-transition);
  position: relative;
  overflow: hidden;
  color: var(--space-text-secondary);
  font-weight: 600;
}

.step-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 100%;
  background: linear-gradient(45deg, var(--space-accent), var(--space-purple));
  transition: width 0.3s ease;
  z-index: -1;
}

.step-item.active::before,
.step-item.completed::before {
  width: 100%;
}

.step-item.active,
.step-item.completed {
  color: white;
  box-shadow: var(--space-glow);
}

.step-item:hover:not(.active) {
  transform: translateY(-2px);
  border-color: var(--space-accent);
}

/* 🔍 مربع البحث */
.search-box {
  width: 100%;
  padding: 1.2rem 2rem;
  font-size: 1.1rem;
  background: var(--space-bg-glass);
  backdrop-filter: blur(10px);
  border: 2px solid rgba(99, 102, 241, 0.3);
  border-radius: var(--space-border-radius);
  color: var(--space-text-primary);
  margin: 2rem 0;
  transition: var(--space-transition);
  position: relative;
  outline: none;
}

.search-box::placeholder {
  color: var(--space-text-muted);
}

.search-box:focus {
  border-color: var(--space-accent);
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.3);
  transform: scale(1.02);
}

/* 📚 بطاقات المواد */
.subjects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 2rem;
  margin: 3rem 0;
}

/* تبسيط التأثيرات المتحركة للهواتف */
.subject-card {
  background: var(--space-bg-glass);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 2rem;
  text-align: center;
  border-radius: var(--space-border-radius);
  cursor: pointer;
  transition: var(--space-transition);
  position: relative;
  animation: fadeInUp 0.6s ease-out;
}

.subject-card:hover {
  transform: translateY(-5px);
  border-color: var(--space-accent);
  box-shadow: 0 10px 20px rgba(99, 102, 241, 0.15);
}

/* تأثيرات إضافية للشاشات الكبيرة */
@media (min-width: 768px) {
  .subject-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--space-accent), var(--space-purple));
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
  }

  .subject-card:hover::before {
    opacity: 0.05;
  }

  .subject-card:hover {
    transform: translateY(-8px) scale(1.01);
    box-shadow: 0 15px 30px rgba(99, 102, 241, 0.2);
  }
}

.subject-card i {
  font-size: 3rem;
  color: var(--space-accent);
  margin-bottom: 1rem;
}

/* حركة خفيفة للشاشات الكبيرة فقط */
@media (min-width: 768px) and (prefers-reduced-motion: no-preference) {
  .subject-card i {
    animation: float 4s ease-in-out infinite;
  }
}

.subject-card h3 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--space-text-primary);
  margin: 1rem 0 0.5rem;
}

.subject-card small {
  color: var(--space-text-secondary);
  font-size: 0.9rem;
}

/* 👨‍🏫 بطاقات المدرسين */
.teachers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
  margin: 3rem 0;
}

.teacher-card {
  background: var(--space-bg-glass);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--space-border-radius);
  padding: 2rem;
  text-align: center;
  cursor: pointer;
  transition: var(--space-transition);
  position: relative;
  overflow: hidden;
  animation: fadeInUp 0.6s ease-out;
}

.teacher-card::before {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: linear-gradient(45deg, var(--space-accent), var(--space-purple), var(--space-cyan));
  border-radius: var(--space-border-radius);
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: -1;
}

.teacher-card:hover::before {
  opacity: 1;
}

.teacher-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 20px 40px rgba(99, 102, 241, 0.3);
}

.teacher-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--space-text-primary);
  margin: 1rem 0 0.5rem;
}

.teacher-card p {
  color: var(--space-text-secondary);
  font-size: 1rem;
}

.teacher-card img {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  border: 3px solid var(--space-accent);
  margin-bottom: 1rem;
  transition: var(--space-transition);
}

.teacher-card:hover img {
  transform: scale(1.1);
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.5);
}

/* 🏢 بطاقات الفصول الجديدة والمحسنة */
.classes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
  margin: 3rem 0;
}

.class-card {
  background: linear-gradient(145deg, var(--space-bg-glass), rgba(255, 255, 255, 0.02));
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  padding: 2rem;
  cursor: pointer;
  transition: var(--space-transition);
  position: relative;
  overflow: hidden;
  animation: fadeInUp 0.6s ease-out;
  backdrop-filter: blur(10px);
}

.class-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(45deg, var(--space-accent), var(--space-purple), var(--space-cyan));
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: -1;
}

.class-card:hover::before {
  opacity: 0.1;
}

.class-card:hover {
  transform: translateY(-8px) scale(1.02);
  border-color: var(--space-accent);
  box-shadow: 0 20px 40px rgba(99, 102, 241, 0.3);
}

/* رأس البطاقة */
.class-card-header {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.class-icon {
  width: 60px;
  height: 60px;
  border-radius: 15px;
  background: linear-gradient(135deg, var(--space-accent), var(--space-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
  transition: var(--space-transition);
}

.class-card:hover .class-icon {
  transform: scale(1.1) rotate(5deg);
  box-shadow: 0 12px 30px rgba(99, 102, 241, 0.6);
}

.class-info {
  flex: 1;
}

.class-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--space-text-primary);
  margin: 0 0 0.5rem 0;
  background: linear-gradient(45deg, var(--space-text-primary), var(--space-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.class-subtitle {
  color: var(--space-text-secondary);
  font-size: 0.9rem;
  margin: 0;
  opacity: 0.8;
}

/* إحصائيات الفصل */
.class-stats {
  display: flex;
  gap: 2rem;
  margin-bottom: 2rem;
}

.stat-item {
  text-align: center;
  flex: 1;
}

.stat-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--space-accent);
  line-height: 1;
  text-shadow: 0 0 20px rgba(99, 102, 241, 0.5);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--space-text-secondary);
  text-transform: uppercase;
  font-weight: 600;
  margin-top: 0.5rem;
}

/* شريط التقدم */
.class-progress {
  margin-bottom: 2rem;
}

.progress-bar {
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  overflow: hidden;
  margin-bottom: 0.8rem;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--space-accent), var(--space-purple), var(--space-cyan));
  border-radius: 20px;
  transition: width 1s ease;
  box-shadow: 0 0 15px rgba(99, 102, 241, 0.6);
}

.progress-text {
  font-size: 0.8rem;
  color: var(--space-text-secondary);
  font-weight: 600;
}

/* زر العمل */
.class-action {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  background: rgba(99, 102, 241, 0.1);
  border-radius: 15px;
  border: 1px solid rgba(99, 102, 241, 0.2);
  transition: var(--space-transition);
}

.class-card:hover .class-action {
  background: rgba(99, 102, 241, 0.2);
  border-color: var(--space-accent);
}

.action-text {
  color: var(--space-accent);
  font-weight: 700;
  font-size: 1rem;
}

.action-arrow {
  color: var(--space-accent);
  font-size: 1.2rem;
  transition: var(--space-transition);
}

.class-card:hover .action-arrow {
  transform: translateX(-5px);
  color: var(--space-purple);
}

/* تحسينات للهواتف */
@media (max-width: 768px) {
  .classes-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .class-card {
    padding: 1.5rem;
    backdrop-filter: none;
  }

  .class-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.2);
  }

  .class-card-header {
    gap: 1rem;
    margin-bottom: 1.5rem;
  }

  .class-icon {
    width: 50px;
    height: 50px;
    font-size: 1.5rem;
  }

  .class-title {
    font-size: 1.2rem;
  }

  .class-stats {
    gap: 1rem;
    margin-bottom: 1.5rem;
  }

  .stat-number {
    font-size: 1.5rem;
  }

  .class-action {
    padding: 0.8rem 1.2rem;
  }
}

/* 🏆 بطاقات عدد المحاضرات - مستخدمة في أقسام أخرى */
.lecture-count-badge {
  background: linear-gradient(135deg, var(--space-accent), var(--space-purple));
  color: white;
  padding: 0.8rem 1.2rem;
  border-radius: 20px;
  display: inline-flex;
  align-items: center;
  margin: 1rem 0;
  box-shadow: 0 8px 20px rgba(99, 102, 241, 0.4);
  position: relative;
  transition: var(--space-transition);
}

.lecture-count-badge:hover {
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 12px 25px rgba(99, 102, 241, 0.5);
}

.badge-container {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  position: relative;
  z-index: 1;
}

.badge-icon {
  font-size: 1.2rem;
}

.badge-content {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.count-number {
  font-weight: 800;
  font-size: 1.3rem;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.count-text {
  font-size: 0.8rem;
  font-weight: 600;
  opacity: 0.9;
}

.badge-sparkle {
  font-size: 0.8rem;
  opacity: 0.8;
}

/* حركة خفيفة للشاشات الكبيرة فقط */
@media (min-width: 768px) and (prefers-reduced-motion: no-preference) {
  .lecture-count-badge::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transform: rotate(45deg);
    animation: float 5s ease-in-out infinite;
    overflow: hidden;
  }

  .badge-icon {
    animation: glow 3s ease-in-out infinite;
  }

  .badge-sparkle {
    animation: float 6s linear infinite;
  }
}
/* 📺 قائمة المحاضرات محسنة للهواتف */
.lecture-list {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
}

.lecture-item {
  background: var(--space-bg-glass);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 1rem;
  border-radius: var(--space-border-radius);
  cursor: pointer;
  transition: var(--space-transition);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.lecture-item:hover {
  transform: translateY(-2px);
  border-color: var(--space-accent);
  box-shadow: 0 5px 15px rgba(99, 102, 241, 0.15);
}

/* تأثيرات إضافية للشاشات الكبيرة فقط */
@media (min-width: 768px) {
  .lecture-item {
    padding: 1.5rem;
  }

  .lecture-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(to bottom, var(--space-accent), var(--space-purple));
    transform: scaleY(0);
    transition: transform 0.3s ease;
  }

  .lecture-item:hover::before {
    transform: scaleY(1);
  }

  .lecture-item:hover {
    transform: translateX(5px) translateY(-3px);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.2);
  }
}

.lecture-title {
  flex: 1;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--space-text-primary);
  margin-bottom: 0.5rem;
}

/* 🎆 محاضرة مكتملة بسيطة */
.lecture-item.completed {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid var(--space-green);
  position: relative;
}

.lecture-item.completed .lecture-title {
  color: var(--space-green);
  font-weight: 700;
}

/* 🟡 محاضرة قيد التقدم */
.lecture-item.in-progress {
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid var(--space-yellow);
}

.lecture-item.in-progress .lecture-title {
  color: var(--space-yellow);
}

/* 📈 شريط التقدم محسن */
.lecture-progress-bar {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 3px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 0 0 var(--space-border-radius) var(--space-border-radius);
  overflow: hidden;
}

.lecture-progress-bar > div {
  height: 100%;
  background: var(--space-accent);
  border-radius: inherit;
  transition: width 0.3s ease;
}

/* 🎥 أيقونة المحاضرة */
.lecture-icon-placeholder {
  color: var(--space-accent);
  font-size: 2rem;
  flex-shrink: 0;
  animation: float 4s ease-in-out infinite;
}

.lecture-item.completed .lecture-icon-placeholder {
  color: var(--space-green);
}

.lecture-item.in-progress .lecture-icon-placeholder {
  color: var(--space-yellow);
}

/* ✅ زر الصح للمحاضرات - محدّث ومتناسق */
.lecture-checkmark-btn {
  width: 40px;
  height: 40px;
  min-width: 40px;
  border-radius: 8px;
  border: 2px solid rgba(255, 255, 255, 0.2);
  background: var(--space-bg-glass);
  backdrop-filter: blur(10px);
  color: var(--space-text-secondary);
  font-size: 1.2rem;
  font-weight: bold;
  cursor: pointer;
  transition: var(--space-transition);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  opacity: 0.6;
}

.lecture-checkmark-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(45deg, var(--space-green), var(--space-cyan));
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: -1;
}

.lecture-checkmark-btn:hover {
  transform: scale(1.05);
  border-color: var(--space-green);
  opacity: 1;
}

.lecture-checkmark-btn:hover::before {
  opacity: 0.2;
}

/* حالة الزر عند التفعيل */
.lecture-checkmark-btn.checked {
  background: var(--space-green);
  border-color: var(--space-green);
  color: white;
  opacity: 1;
  box-shadow: 0 0 15px rgba(16, 185, 129, 0.4);
}

.lecture-checkmark-btn.checked:hover {
  box-shadow: 0 0 20px rgba(16, 185, 129, 0.6);
  transform: scale(1.1);
}

/* 🎉 نظام المكافآت - 3 محاضرات متتالية */
.achievement-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(10px);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 10000;
  animation: fadeIn 0.5s ease;
}

.achievement-content {
  background: linear-gradient(135deg, var(--space-primary), var(--space-secondary), var(--space-accent));
  border: 2px solid rgba(99, 102, 241, 0.3);
  padding: 3rem;
  border-radius: 20px;
  text-align: center;
  position: relative;
  overflow: hidden;
  max-width: 500px;
  margin: 2rem;
  animation: celebrationBounce 1s ease-out;
  box-shadow: 
    0 0 30px rgba(99, 102, 241, 0.4),
    0 0 60px rgba(139, 92, 246, 0.2),
    inset 0 0 30px rgba(6, 182, 212, 0.1);
}

.achievement-content::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
  animation: rotate 10s linear infinite;
}

.achievement-content h2 {
  font-size: 2.5rem;
  color: var(--space-text-primary);
  margin-bottom: 1rem;
  text-shadow: 0 0 20px rgba(255, 255, 255, 0.5);
}

.achievement-content p {
  font-size: 1.2rem;
  color: var(--space-text-secondary);
  margin-bottom: 2rem;
}

.achievement-icon {
  font-size: 4rem;
  color: var(--space-accent);
  margin-bottom: 1rem;
  animation: fireAnimation 1.5s ease-in-out infinite;
  text-shadow: 
    0 0 10px var(--space-accent),
    0 0 20px var(--space-purple),
    0 0 30px var(--space-cyan),
    0 0 40px var(--space-accent);
  filter: 
    drop-shadow(0 0 15px rgba(99, 102, 241, 0.8))
    drop-shadow(0 0 25px rgba(139, 92, 246, 0.6));
}

.achievement-close {
  background: var(--space-accent);
  color: white;
  border: none;
  padding: 1rem 2rem;
  border-radius: 50px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--space-transition);
  box-shadow: 0 5px 15px rgba(99, 102, 241, 0.4);
}

.achievement-close:hover {
  background: var(--space-purple);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(139, 92, 246, 0.4);
}

/* الرسوم المتحركة */
@keyframes celebrationBounce {
  0% { transform: scale(0.3) rotate(-45deg); opacity: 0; }
  50% { transform: scale(1.1) rotate(0deg); opacity: 1; }
  100% { transform: scale(1) rotate(0deg); opacity: 1; }
}

@keyframes fireAnimation {
  0%, 100% { 
    transform: scale(1) rotate(-2deg);
    text-shadow: 
      0 0 10px var(--space-accent),
      0 0 20px var(--space-purple),
      0 0 30px var(--space-cyan),
      0 0 40px var(--space-accent);
    filter: 
      drop-shadow(0 0 15px rgba(99, 102, 241, 0.8))
      drop-shadow(0 0 25px rgba(139, 92, 246, 0.6));
  }
  25% { 
    transform: scale(1.1) rotate(1deg);
    text-shadow: 
      0 0 15px var(--space-purple),
      0 0 25px var(--space-accent),
      0 0 35px var(--space-cyan),
      0 0 45px var(--space-purple);
    filter: 
      drop-shadow(0 0 20px rgba(139, 92, 246, 0.9))
      drop-shadow(0 0 30px rgba(6, 182, 212, 0.7));
  }
  50% { 
    transform: scale(1.15) rotate(-1deg);
    text-shadow: 
      0 0 20px var(--space-cyan),
      0 0 30px var(--space-purple),
      0 0 40px var(--space-accent),
      0 0 50px var(--space-cyan);
    filter: 
      drop-shadow(0 0 25px rgba(6, 182, 212, 1))
      drop-shadow(0 0 35px rgba(99, 102, 241, 0.8));
  }
  75% { 
    transform: scale(1.05) rotate(2deg);
    text-shadow: 
      0 0 12px var(--space-purple),
      0 0 22px var(--space-accent),
      0 0 32px var(--space-cyan),
      0 0 42px var(--space-purple);
    filter: 
      drop-shadow(0 0 18px rgba(139, 92, 246, 0.9))
      drop-shadow(0 0 28px rgba(99, 102, 241, 0.7));
  }
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-20px); }
  60% { transform: translateY(-10px); }
}

@keyframes rotate {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes fadeIn {
  0% { opacity: 0; }
  100% { opacity: 1; }
}

/* 💫 تأثيرات الجزيئات المتناثرة - بألوان فضائية */
.confetti {
  position: fixed;
  width: 10px;
  height: 10px;
  background: var(--space-accent);
  animation: confettiFall 3s ease-in-out;
  pointer-events: none;
  z-index: 10001;
}

.confetti:nth-child(2n) { background: var(--space-purple); }
.confetti:nth-child(3n) { background: var(--space-cyan); }
.confetti:nth-child(4n) { background: var(--space-accent); }
.confetti:nth-child(5n) { background: var(--space-purple); }
.confetti:nth-child(6n) { background: var(--space-cyan); }

@keyframes confettiFall {
  0% {
    transform: translateY(-100vh) rotate(0deg);
    opacity: 1;
  }
  100% {
    transform: translateY(100vh) rotate(720deg);
    opacity: 0;
  }
}


/* 🔙 أزرار العودة الفضائية */
.back-button {
  background: var(--space-primary) !important;
  backdrop-filter: blur(10px);
  color: var(--space-text-primary) !important;
  padding: 1rem 2rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50px;
  cursor: pointer;
  margin-top: 2rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--space-transition);
  font-weight: 600;
  text-decoration: none;
  opacity: 0.9;
}

.back-button:hover {
  background: var(--space-accent);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--space-glow);
  border-color: var(--space-accent);
  opacity: 1;
}

.back-button:active {
  background: var(--space-purple);
  transform: translateY(0);
}

/* 📽️ مشغل الفيديو */
#videoPage {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--space-bg-primary);
  z-index: 10000;
  overflow-y: auto;
  padding: 1rem;
}

#videoPage .video-header {
  text-align: center;
  background: linear-gradient(135deg, var(--space-primary), var(--space-secondary), var(--space-accent));
  padding: 2rem;
  border-radius: var(--space-border-radius);
  margin-bottom: 2rem;
  position: relative;
  overflow: hidden;
}

#videoPage .video-header::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  animation: float 8s ease-in-out infinite;
  pointer-events: none;
}

#videoPage .video-header .video-title {
  margin: 0;
  font-size: 2.2rem;
  font-weight: 800;
  background: linear-gradient(45deg, #fff, var(--space-cyan), var(--space-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  cursor: pointer;
  transition: var(--space-transition);
  position: relative;
  z-index: 2;
}

#videoPage .video-header .video-title:hover {
  transform: scale(1.05);
  text-shadow: 0 0 20px rgba(255, 255, 255, 0.5);
}

.video-wrapper {
  max-width: 1200px;
  margin: 2rem auto;
  background: var(--space-bg-glass);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--space-border-radius);
  overflow: hidden;
  box-shadow: var(--space-shadow);
}

.video-player-container {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #000;
}

#player {
  width: 100%;
  height: 100%;
  display: block;
}

.video-meta {
  padding: 2rem;
  color: var(--space-text-primary);
}

.video-meta h2 {
  font-size: 1.8rem;
  margin-bottom: 1rem;
  color: var(--space-text-primary);
  font-weight: 700;
}

.video-meta p {
  font-size: 1.1rem;
  color: var(--space-text-secondary);
  margin-bottom: 2rem;
  line-height: 1.8;
}

#videoPage .back-button {
  background: var(--space-accent);
  color: white;
  padding: 1rem 2rem;
  border: none;
  border-radius: 50px;
  font-size: 1.1rem;
  cursor: pointer;
  transition: var(--space-transition);
  display: block;
  margin: 2rem auto 0;
  width: fit-content;
  font-weight: 600;
}

#videoPage .back-button:hover {
  background: var(--space-purple);
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(139, 92, 246, 0.4);
}

/* 📱 زر التيليجرام العائم */
.floating-telegram-btn {
  position: fixed;
  bottom: 30px;
  left: 30px;
  background: linear-gradient(135deg, #0088cc, #006b9e);
  color: #fff;
  padding: 1rem 1.5rem;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 700;
  box-shadow: 0 8px 25px rgba(0, 136, 204, 0.3);
  z-index: 1000;
  display: flex;
  align-items: center;
  font-size: 1rem;
  transition: var(--space-transition);
  animation: float 4s ease-in-out infinite;
}

.floating-telegram-btn i {
  margin-right: 0.5rem;
  font-size: 1.2rem;
}

.floating-telegram-btn:hover {
  background: linear-gradient(135deg, #006b9e, #0088cc);
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 15px 35px rgba(0, 136, 204, 0.4);
}



/* 🌍 الفوتر الفضائي */
footer {
  background: linear-gradient(135deg, var(--space-primary), var(--space-secondary));
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 3rem 2rem;
  text-align: center;
  margin-top: 4rem;
  position: relative;
  overflow: hidden;
}

footer::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
  animation: rotate 15s linear infinite;
  pointer-events: none;
}

footer > div {
  position: relative;
  z-index: 2;
  max-width: 1000px;
  margin: 0 auto;
}

footer h3 {
  margin-bottom: 1rem;
  font-weight: 800;
  font-size: 1.8rem;
  background: linear-gradient(45deg, #fff, var(--space-cyan), var(--space-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

footer p {
  margin-bottom: 2rem;
  font-size: 1.1rem;
  color: var(--space-text-secondary);
  line-height: 1.6;
}

footer p strong {
  color: var(--space-accent);
}

footer a {
  color: var(--space-accent);
  margin: 0 1rem;
  font-size: 1.5rem;
  transition: var(--space-transition);
  display: inline-block;
}

footer a:hover {
  color: var(--space-purple);
  transform: translateY(-3px) scale(1.1);
  text-shadow: 0 5px 15px rgba(99, 102, 241, 0.5);
}

/* 📱 التجاوب المتطور */
@media (max-width: 768px) {
  .container { padding: 1rem; }
  .header h2 { font-size: 1.8rem; }
  .subjects-grid, .teachers-grid, .classes-grid {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1rem;
  }
  .navigation-steps { flex-direction: column; align-items: center; }
  .step-item { width: 100%; max-width: 300px; justify-content: center; }
  .lecture-item { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 576px) {
  .subjects-grid, .teachers-grid, .classes-grid { grid-template-columns: 1fr; }
  .header h2 { font-size: 1.5rem; }
  .floating-telegram-btn { padding: 0.7rem 1rem; font-size: 0.8rem; }
}

/* 🎆 تأثيرات إضافية */
.content-section {
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.5s ease, visibility 0.5s ease, transform 0.5s ease;
  transform: translateY(20px);
}

.content-section.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* Removed old conflicting teacher grid styles */

/* Removed old conflicting styles */

/* Removed old conflicting navigation steps styles */

/* Removed old conflicting styles - all subject cards now use space theme */

.back-button {
  background: #f8f9fa;
  color: #333; /* Added default text color */
  padding: 0.5rem 1rem;
  border-radius: 20px;
  cursor: pointer;
  margin-top: 1rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.3s ease;
  border: 1px solid #ddd; /* Added subtle border */
}

.back-button:hover {
  background: var(--primary-color);
  color: #fff;
  border-color: var(--primary-color); /* Match border with background */
}

/* Updated search box to use space theme properly */
.search-box {
  width: 100%;
  padding: 1.2rem 2rem;
  font-size: 1.1rem;
  background: var(--space-bg-glass);
  backdrop-filter: blur(10px);
  border: 2px solid rgba(99, 102, 241, 0.3);
  border-radius: var(--space-border-radius);
  color: var(--space-text-primary);
  margin: 2rem 0;
  transition: var(--space-transition);
  position: relative;
  outline: none;
}

.search-box::placeholder {
  color: var(--space-text-muted);
}

.search-box:focus {
  border-color: var(--space-accent);
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.3);
  transform: scale(1.02);
}

.dynamic-content {
  position: relative;
  min-height: 300px; /* Adjusted min-height */
}

/* Removed old conflicting content-section styles */

/* Video wrapper styles */
.video-wrapper {
  max-width: 1200px;
  margin: 2rem auto;
  background: var(--space-bg-glass);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--space-border-radius);
  overflow: hidden;
  box-shadow: var(--space-shadow);
}

/* Player Container */
.video-player-container {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #000;
}

/* Plyr Video */
#player { /* Ensure this ID is used by your video player if it's Plyr */
  width: 100%;
  height: 100%;
  display: block;
}

/* Video Meta */
.video-meta {
  padding: 1.5rem; /* Adjusted padding */
  color: #222;
}

.video-meta h2 {
  font-size: 1.5rem; /* Adjusted font size */
  margin-bottom: 0.8rem;
}

.video-meta p {
  font-size: 1rem; /* Adjusted font size */
  color: #555;
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

/* Video Page Back Button */
#videoPage .back-button { /* Specific to video page */
  padding: 0.8rem 1.5rem; /* Adjusted padding */
  background-color: var(--primary-color); /* Consistent button color */
  color: white;
  border: none;
  border-radius: 12px;
  font-size: 1rem;
  cursor: pointer;
  transition: background-color 0.3s ease;
  display: block; /* Make it block to center with margin auto */
  margin: 1.5rem auto 0; /* Center button */
  width: fit-content; /* Adjust width to content */
}

#videoPage .back-button:hover {
  background-color: #0056b3; /* Darker shade on hover */
}

/* Floating Telegram Button */
.floating-telegram-btn {
  position: fixed;
  bottom: 20px;
  left: 20px; /* Keep on left for LTR, adjust if RTL needs it on right */
  background: #0088cc;
  color: #fff;
  padding: 10px 15px;
  border-radius: 50px;
  text-decoration: none;
  font-weight: bold;
  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
  z-index: 1000;
  display: flex;
  align-items: center;
  font-size: 0.9rem; /* Adjusted font size */
}

.floating-telegram-btn i {
  margin-right: 8px; /* For LTR, adjust if icon is on other side for RTL */
}

.floating-telegram-btn:hover {
  background: #006b9e;
}


/* ====== Responsive Adjustments ====== */

/* Medium screens (tablets) */
@media (max-width: 992px) {
  .container {
    padding: 1.5rem;
  }
  .video-meta h2 {
    font-size: 1.3rem;
  }
  .video-meta p {
    font-size: 0.95rem;
  }
  #videoPage .video-header .video-title {
    font-size: 1.6rem;
  }
}


/* Small screens (tablets and large mobiles) */
@media (max-width: 768px) {
  .container {
    padding: 1rem;
  }
  .header-content {
    flex-direction: column;
    gap: 1rem;
    align-items: flex-start;
  }
  .header-icons {
    width: 100%;
    justify-content: space-between; /* Spread icons on mobile header */
  }
  .teachers-grid {
    grid-template-columns: 1fr; /* Single column for teachers */
  }
  .subjects-grid,
  .classes-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); /* Smaller cards */
    gap: 1rem;
  }
  .step-item {
    font-size: 0.9rem;
    padding: 0.6rem 1rem;
  }
  .profile-circle,
  .settings-circle {
    width: 40px;
    height: 40px;
  }
  .search-box {
    padding: 0.8rem;
    font-size: 0.9rem;
  }
  .lecture-item {
    flex-direction: column; /* Stack lecture item content */
    align-items: flex-start;
    gap: 0.5rem;
  }
  .badge {
    align-self: flex-start; /* Align badge properly in stacked layout */
  }
/* Pinch-to-zoom داخل Plyr */
.video-player-container .plyr__video-wrapper {
  transition: transform 0.15s ease;
  will-change: transform;
}

/* توست بسيط إذا ما كان عندك ستايل له */
#toast.toast {
  position: fixed;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.7);
  color: #fff;
  padding: .5rem .75rem;
  border-radius: 10px;
  font-size: 14px;
  opacity: 0;
  pointer-events: none;
}
#toast.toast.show { opacity: 1; }

  /* Video Page on Small Screens */
  #videoPage {
    padding: 0.5rem;
  }
  .video-wrapper {
    margin: 1rem auto;
    border-radius: 12px; /* Slightly smaller radius */
  }
  #videoPage .video-header {
    padding: 1rem 0.5rem;
    margin-bottom: 1rem;
  }
  #videoPage .video-header .video-title {
    font-size: 1.4rem;
  }
  .video-meta {
    padding: 1rem;
  }
  .video-meta h2 {
    font-size: 1.2rem;
  }
  .video-meta p {
    font-size: 0.9rem;
  }
  #videoPage .back-button {
    padding: 0.7rem 1.2rem;
    font-size: 0.9rem;
  }
  .floating-telegram-btn {
    padding: 8px 12px;
    font-size: 0.8rem;
    bottom: 15px;
    left: 15px;
  }
}

/* Extra small screens (mobiles) */
@media (max-width: 576px) {
  .container {
    padding: 0.8rem;
  }
  .header {
    padding: 1rem;
  }
  .step-item {
    width: 100%; /* Full width steps on very small screens */
    justify-content: center;
  }
  .subjects-grid,
  .classes-grid {
    grid-template-columns: 1fr; /* Single column for subjects/classes */
  }
  .subject-card, .class-card {
    padding: 1rem;
  }
  .teacher-card {
    padding: 1rem;
  }
  #videoPage .video-header .video-title {
    font-size: 1.2rem;
  }
  .video-meta h2 {
    font-size: 1.1rem;
  }
  .video-meta p {
    font-size: 0.85rem;
  }
  .floating-telegram-btn {
    padding: 6px 10px;
    font-size: 0.75rem;
    bottom: 10px;
    left: 10px;
  }
  .floating-telegram-btn i {
    margin-right: 5px;
  }
}

/* 🎉 رسالة الترحيب - متوافقة تماماً */
.welcome-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100vw;
  height: 100vh;
  z-index: 99999;
  display: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.welcome-modal.show {
  opacity: 1;
}

.welcome-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.9);
  backdrop-filter: blur(10px);
}

.welcome-content {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: linear-gradient(145deg, var(--space-primary), var(--space-secondary));
  border: 2px solid rgba(99, 102, 241, 0.3);
  border-radius: 20px;
  width: 90%;
  max-width: 500px;
  max-height: 85vh;
  overflow-y: auto;
  overflow-x: hidden;
  box-shadow: 
    0 20px 60px rgba(0, 0, 0, 0.5),
    0 0 40px rgba(99, 102, 241, 0.3);
  -webkit-overflow-scrolling: touch;
}

.welcome-content::-webkit-scrollbar {
  width: 6px;
}

.welcome-content::-webkit-scrollbar-thumb {
  background: rgba(99, 102, 241, 0.5);
  border-radius: 3px;
}

/* الهيدر */

.welcome-header {
  text-align: center;
  padding: 2rem 1.5rem 1rem;
}

.welcome-icon {
  width: 70px;
  height: 70px;
  margin: 0 auto 1rem;
  background: linear-gradient(135deg, #0088cc, #006b9e);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: white;
  box-shadow: 0 10px 30px rgba(0, 136, 204, 0.4);
}

.welcome-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
  margin: 0;
}

.welcome-body {
  padding: 0 1.5rem 1.5rem;
}

/* تنبيه مهم */
.important-notice {
  background: rgba(255, 152, 0, 0.15);
  border: 2px solid rgba(255, 152, 0, 0.5);
  border-radius: 10px;
  padding: 12px;
  display: flex;
  gap: 10px;
  margin-bottom: 15px;
}

.important-notice i {
  font-size: 20px;
  color: #ff9800;
  flex-shrink: 0;
  margin-top: 2px;
}

.important-notice strong {
  color: #ff9800;
  font-size: 14px;
  display: block;
  margin-bottom: 5px;
  font-weight: 700;
}

.important-notice p {
  color: #fff;
  font-size: 13px;
  line-height: 1.4;
  margin: 0;
}

.welcome-text {
  font-size: 16px;
  color: var(--space-text-secondary);
  text-align: center;
  margin-bottom: 15px;
  font-weight: 600;
}

.welcome-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 15px;
}

.feature-item {
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: 10px;
  padding: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.feature-item i {
  font-size: 18px;
  color: var(--space-accent);
  flex-shrink: 0;
}

.feature-item span {
  font-size: 13px;
  color: #fff;
  font-weight: 600;
  line-height: 1.3;
}

.welcome-description {
  font-size: 14px;
  color: var(--space-text-secondary);
  text-align: center;
  line-height: 1.5;
  background: rgba(255, 255, 255, 0.03);
  padding: 12px;
  border-radius: 10px;
  margin-bottom: 15px;
}

.welcome-footer {
  padding: 0 1.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.welcome-btn-primary {
  background: linear-gradient(135deg, #0088cc, #006b9e);
  color: white;
  padding: 14px;
  border: none;
  border-radius: 50px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-decoration: none;
  box-shadow: 0 8px 25px rgba(0, 136, 204, 0.3);
}

.welcome-btn-primary i {
  font-size: 18px;
}

.welcome-btn-secondary {
  background: transparent;
  color: var(--space-text-secondary);
  padding: 12px;
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-radius: 50px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

.welcome-btn-secondary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.welcome-note {
  padding: 12px 1.5rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: rgba(99, 102, 241, 0.05);
  border-top: 1px solid rgba(99, 102, 241, 0.1);
}

.welcome-note i {
  color: var(--space-accent);
  font-size: 14px;
}

.welcome-note span {
  color: var(--space-text-secondary);
  font-size: 12px;
  line-height: 1.4;
  text-align: center;
}

/* للجوال */
@media (max-width: 768px) {
  .welcome-content {
    width: 95%;
    max-height: 80vh;
  }
  
  .welcome-header {
    padding: 1.5rem 1rem 0.75rem;
  }
  
  .welcome-icon {
    width: 60px;
    height: 60px;
    font-size: 1.8rem;
  }
  
  .welcome-title {
    font-size: 1.3rem;
  }
  
  .welcome-body {
    padding: 0 1rem 1rem;
  }
  
  .important-notice {
    padding: 10px;
    gap: 8px;
    margin-bottom: 12px;
  }
  
  .important-notice i {
    font-size: 18px;
  }
  
  .important-notice strong {
    font-size: 13px;
  }
  
  .important-notice p {
    font-size: 12px;
  }
  
  .welcome-text {
    font-size: 15px;
    margin-bottom: 12px;
  }
  
  .welcome-features {
    gap: 8px;
    margin-bottom: 12px;
  }
  
  .feature-item {
    padding: 8px;
  }
  
  .feature-item i {
    font-size: 16px;
  }
  
  .feature-item span {
    font-size: 12px;
  }
  
  .welcome-description {
    font-size: 13px;
    padding: 10px;
    margin-bottom: 12px;
  }
  
  .welcome-footer {
    padding: 0 1rem 1rem;
    gap: 8px;
  }
  
  .welcome-btn-primary {
    padding: 12px;
    font-size: 15px;
  }
  
  .welcome-btn-primary i {
    font-size: 16px;
  }
  
  .welcome-btn-secondary {
    padding: 10px;
    font-size: 13px;
  }
  
  .welcome-note {
    padding: 10px 1rem 1rem;
  }
  
  .welcome-note i {
    font-size: 13px;
  }
  
  .welcome-note span {
    font-size: 11px;
  }
}

/* 📱 تحسينات خاصة بالهواتف والأجهزة الضعيفة */
@media (max-width: 767px) {
  /* تقليل التأثيرات المعقدة */
  * {
    -webkit-transform: translateZ(0);
    -webkit-backface-visibility: hidden;
    -webkit-perspective: 1000;
  }

  /* إيقاف الانيميشن للهواتف */
  .header::before,
  .subject-card i,
  .lecture-icon-placeholder,
  .badge-icon,
  .badge-sparkle,
  .lecture-count-badge::before {
    animation: none !important;
  }

  /* تبسيط الخلفيات */
  .subject-card,
  .teacher-card,
  .class-card,
  .lecture-item {
    backdrop-filter: none;
  }

  /* تحسين أداء النصوص */
  .header h2 {
    text-shadow: none;
    background: #fff;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  /* تبسيط الظلال */
  .subject-card:hover,
  .teacher-card:hover,
  .class-card:hover,
  .lecture-item:hover {
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.1);
    transform: translateY(-1px);
  }

  /* تحسين أداء النماذج */
  .achievement-modal {
    backdrop-filter: none;
    background: rgba(0, 0, 0, 0.9);
  }

  .achievement-content::before {
    display: none;
  }
}

/* تحسينات إضافية للأجهزة البطيئة جداً */
@media (max-width: 480px) and (max-device-width: 480px) {
  /* تقليل جودة الرسوميات */
  * {
    -webkit-font-smoothing: subpixel-antialiased;
  }

  /* إزالة التدرجات المعقدة */
  .header,
  .year-btn.active,
  .achievement-content {
    background: var(--space-primary) !important;
  }

  /* تبسيط العناصر */
  .lecture-count-badge {
    background: var(--space-accent) !important;
  }

  .lecture-progress-bar > div {
    background: var(--space-accent) !important;
  }
}

/* تحسين الأداء للشاشات اللمسية */
@media (hover: none) and (pointer: coarse) {
  /* إزالة تأثيرات hover للأجهزة اللمسية */
  .subject-card:hover,
  .teacher-card:hover,
  .class-card:hover,
  .lecture-item:hover {
    transform: none;
    box-shadow: none;
  }

  /* تبسيط التفاعلات */
  .subject-card:active,
  .teacher-card:active,
  .class-card:active,
  .lecture-item:active {
    transform: scale(0.98);
    opacity: 0.8;
  }
}

/* تحسين أداء will-change للعناصر المتحركة */
@media (min-width: 768px) {
  .subject-card,
  .teacher-card,
  .class-card,
  .lecture-item {
    will-change: transform;
  }

  .subject-card:hover,
  .teacher-card:hover,
  .class-card:hover,
  .lecture-item:hover {
    will-change: auto;
  }
}