/* متغيرات الألوان */
:root {
  --primary-color: #c62828;
  --primary-hover: #3a56e0;
  --text-color: #f0f0f0;
  --text-hover: #ffffff;
  --darker-color: #e0e0e0;
  --dark-color: #333;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}
/* الهيدر المعدل والمحسن */
.main-header {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: rgba(26, 26, 46, 0.85);
  backdrop-filter: blur(12px) saturate(180%);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  box-shadow: var(--shadow);
  transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.main-header.scrolled {
  background-color: rgba(22, 33, 62, 0.95);
  padding: 8px 0;
  box-shadow: 0 6px 25px rgba(0, 0, 0, 0.25);
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
}

.logo img {
  height: 48px;
  transition: all 0.3s ease;
  filter: drop-shadow(0 2px 5px rgba(0, 0, 0, 0.2));
}

.logo:hover img {
  transform: scale(1.08);
  filter: drop-shadow(0 4px 8px rgba(78, 107, 255, 0.3));
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 30px;
  margin: 0;
  padding: 0;
}

.nav-links li {
  position: relative;
}

.nav-links li a {
  color: var(--text-color);
  text-decoration: none;
  font-weight: 600;
  font-size: 1.1rem;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  padding: 10px 0;
  display: block;
  position: relative;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.nav-links li a::before {
  content: '';
  position: absolute;
  bottom: 0;
  right: 0;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-color), #6a8eff);
  border-radius: 3px 3px 0 0;
  transition: width 0.4s ease, box-shadow 0.4s ease;
}

.nav-links li a:hover::before,
.nav-links li a.active::before {
  width: 100%;
  box-shadow: 0 0 15px var(--primary-color);
}

.nav-links li a:hover,
.nav-links li a.active {
  color: var(--text-hover);
  transform: translateY(-2px);
}

/* CSS المعدل لزر تسجيل الدخول */
.login-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: var(--primary-color);
  color: white;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(78, 107, 255, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.login-btn:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(58, 86, 224, 0.35);
}

.login-btn:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(58, 86, 224, 0.3);
}

.login-btn .nav-icon {
  font-size: 0.9em;
}

/* تعديلات للهواتف */
@media (max-width: 768px) {
  .login-btn {
    padding: 8px 16px;
    font-size: 0.9rem;
    margin-left: auto; /* لضبط الموضع في النسخة الموبايل */
  }
  
  .login-btn .nav-icon {
    font-size: 0.8em;
  }
}

@media (max-width: 576px) {
  .login-btn {
    padding: 7px 14px;
    font-size: 0.85rem;
  }
  
  .login-btn span {
    display: none; /* إخفاء النص في الشاشات الصغيرة */
  }
  
  .login-btn .nav-icon {
    font-size: 1em;
    margin-right: 0;
  }
}
/* زر القائمة المتنقلة */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-color);
  font-size: 1.8rem;
  cursor: pointer;
  transition: all 0.3s ease;
  padding: 5px;
  border-radius: 5px;
}

.mobile-menu-btn:hover {
  color: var(--primary-color);
  background: rgba(255, 255, 255, 0.1);
  transform: rotate(90deg);
}

/* تأثيرات الهاتف */
@media (max-width: 992px) {
  .nav-links {
    gap: 20px;
  }
  
  .nav-links li a {
    font-size: 1rem;
  }
  
  .login-btn .btn {
    padding: 10px 22px;
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 80px;
    right: -100%;
    width: 280px;
    height: calc(100vh - 80px);
    background-color: rgba(26, 26, 46, 0.95);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    padding: 40px 30px;
    transition: right 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 999;
    gap: 25px;
    border-left: 1px solid rgba(255, 255, 255, 0.1);
  }
  
  .nav-links.active {
    right: 0;
  }
  
  .nav-links li a {
    font-size: 1.2rem;
    padding: 8px 0;
  }
  
  .nav-links li a::before {
    height: 2px;
  }
  
  .login-btn {
    margin-right: auto;
    margin-left: 20px;
    order: -1;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .logo img {
    height: 42px;
  }
}

@media (max-width: 576px) {
  .logo img {
    height: 38px;
  }
  
  .mobile-menu-btn {
    font-size: 1.6rem;
  }
  
  .nav-links {
    top: 72px;
    height: calc(100vh - 72px);
    width: 75%;
  }
  
  .login-btn .btn {
    padding: 8px 18px;
    font-size: 0.9rem;
  }
}

/* تأثيرات إضافية عند التمرير */
@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.main-header.scrolled {
  animation: fadeInDown 0.5s ease forwards;
}