* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-container {
  width: 100%;
  max-width: 400px;
  padding: 20px;
}

.login-box {
  background: white;
  border-radius: 16px;
  padding: 40px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.logo {
  font-size: 64px;
  text-align: center;
  margin-bottom: 24px;
}

h2 {
  text-align: center;
  color: #333;
  margin-bottom: 32px;
  font-size: 24px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  color: #666;
  font-size: 14px;
}

.form-group input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-size: 14px;
  transition: border-color 0.3s;
}

.form-group input:focus {
  outline: none;
  border-color: #667eea;
}

.btn-primary {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: bold;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  margin-top: 24px;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
}

.btn-primary:active {
  transform: translateY(0);
}

.toggle-form {
  text-align: center;
  margin-top: 24px;
  color: #666;
  font-size: 14px;
}

.toggle-form a {
  color: #667eea;
  text-decoration: none;
  font-weight: bold;
  margin-left: 4px;
}

.toggle-form a:hover {
  text-decoration: underline;
}

.admin-link {
  text-align: center;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid #eee;
}

.admin-link a {
  color: #999;
  text-decoration: none;
  font-size: 13px;
  transition: color 0.3s;
}

.admin-link a:hover {
  color: #667eea;
}

@media (max-width: 480px) {
  .login-box {
    padding: 30px 20px;
  }
  
  h2 {
    font-size: 20px;
  }
}