@charset "UTF-8";

/**
 * 通用
 */
 /* 时尚导航栏样式 */
 .navbar {
  background: rgba(15, 23, 42, 0.95) !important;
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
  padding: 0.75rem 0;
}

.navbar-brand {
  position: relative;
  padding: 8px 0;
  transition: all 0.3s ease;
}

.navbar-brand:hover .brand-icon {
  transform: scale(1.1) rotate(5deg);
}

.brand-icon {
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.brand-icon i {
  font-size: 1.5rem;
  color: white;
}

.navbar-brand h1 {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 2px;
}

.navbar-brand small {
  font-size: 0.7rem;
  letter-spacing: 0.5px;
}

.navbar-nav .nav-link {
  position: relative;
  padding: 0.75rem 1.25rem !important;
  font-weight: 500;
  transition: all 0.3s ease;
}

.navbar-nav .nav-link::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #667eea, #764ba2);
  transform: translateX(-50%);
  transition: width 0.3s ease;
}

.navbar-nav .nav-link:hover::before,
.navbar-nav .nav-link.active::before {
  width: 80%;
}

.navbar-nav .nav-link:hover {
  color: #fff !important;
  transform: translateY(-2px);
}

.navbar-nav .nav-link.active {
  color: #ffc107 !important;
}

.navbar-toggler {
  border: 2px solid rgba(255, 255, 255, 0.2);
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
}

.navbar-toggler:focus {
  box-shadow: 0 0 0 0.25rem rgba(102, 126, 234, 0.25);
}

/* 渐变按钮样式（登录/学习系统/用户中心） */
.navbar-nav .btn-gradient {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 0.5rem 1.25rem !important;
  border-radius: 25px;
  margin-left: 0.5rem;
  box-shadow: 0 3px 10px rgba(102, 126, 234, 0.2);
}

.navbar-nav .btn-gradient:hover {
  background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.navbar-nav .btn-gradient::before {
  display: none;
}

/* 品牌图标样式 */
.brand-icon {
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}

 @media (max-width: 768px) {
  .auth-container {
      padding: 0;
      margin: 0;
  }

  .auth-container.auth-container .card-body.p-5 {
    padding: 2rem 1.5rem !important;
  }
}