.head_main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  padding: 20px 30px;
  background-color: #fff;
  flex-wrap: wrap;
}

.left, .center, .right {
  flex: 1 1 200px; /* ✅ Responsive base width */
  text-align: center;
}

.center {
 flex: 2 1 400px;
}
h3.cin{
  margin: 0;
}
.logo {
  max-height: 150px;
  width: auto;
}

#line1 {
  font-family: Impact, Haettenschweiler, 'Arial Narrow Bold', sans-serif;
  font-size: 55px;
  color: #1c7ec0;
}

#line2 {
  font-size: 26px;
  color: #1c7ec0;
  font-stretch: ultra-expanded;
}

#underline {
  margin: 5px auto;
  width: 80%;
  border: 1px solid #aaa;
}

#line3 {
  font-family: sans-serif, bold;
  font-size: 27px;
  color: #575757;
  font-weight: 700;
}
@media (max-width: 768px) {
  .head_main {
    flex-direction: column;
    padding: 15px 10px;
  }

  .left, .center, .right {
    flex: none;
    width: 100%;
  }
  
  .logo {
    max-height: 50px;
  }
  h3.cin{
    font-size: 8px;
  }
  #line1 {
    font-size: 18px;
  }

  #line2, #line3 {
    font-size: 14px;
  }
}