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

body {
  background: #f4f7f9;
  font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: #333;
  line-height: 1.6;
}

#regForm {
  background: #fff;
  margin: 40px auto;
  padding: 50px;
  width: 90%;
  min-width: 320px;
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}

h1 {
  text-align: center;
  margin-bottom: 40px;
  font-size: 28px;
  color: #222;
  font-weight: 600;
}

input,
select {
  width: 100%;
  padding: 14px 18px;
  margin-bottom: 25px;
  border: 1px solid #dcdfe6;
  border-radius: 8px;
  font-size: 16px;
  transition: 0.3s;
  background: #fff;
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3Csvg fill='gray' height='20' viewBox='0 0 24 24' width='20' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  background-size: 16px;
  padding-right: 40px;
}

input:focus,
select:focus {
  border-color: #409eff;
  box-shadow: 0 0 6px rgba(64, 158, 255, 0.3);
  outline: none;
}

input.invalid,
select.invalid {
  background-color: #ffe6e6;
  border-color: #ff4d4f;
}


.tab {
  display: none;
}

button {
  background: #409eff;
  color: white;
  border: none;
  padding: 12px 28px;
  font-size: 16px;
  border-radius: 6px;
  cursor: pointer;
  transition: 0.3s;
  font-weight: 500;
}

button:hover {
  background: #2a8cd8;
}

#prevBtn {
  background-color: #dcdfe6;
  color: #333;
}

#prevBtn:hover {
  background-color: #c0c4cc;
}

.step {
  height: 12px;
  width: 12px;
  margin: 0 4px;
  background-color: #dcdfe6;
  border-radius: 50%;
  display: inline-block;
  opacity: 0.6;
  transition: 0.3s;
}

.step.active {
  background-color: #409eff;
  opacity: 1;
  transform: scale(1.2);
}

.step.finish {
  background-color: #67c23a;
  box-shadow: 0 0 6px rgba(103, 194, 58, 0.4);
}