.post-password-form{
  max-width: 420px;
  margin: 60px auto;
  padding: 32px 28px;
  border: 1px solid #e0e0e0;
  border-radius: 12px;
  background-color: #fff;
  box-shadow: 0 4px 10px rgba(0,0,0,0.05);
  text-align: center;
  font-family: 'Noto Sans JP', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}
.post-password-form p{
  margin: 1em 0;
  color: #333;
  font-size: 15px;
  line-height: 1.7;
}
.post-password-form label{
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  color: #111;
}
.post-password-form input[type="password"]{
  width: 100%;
  max-width: 280px;
  padding: 10px 12px;
  border: 1px solid #cfcfcf;
  border-radius: 6px;
  font-size: 15px;
  transition: border-color .2s ease, box-shadow .2s ease, background-color .2s ease;
  background-color: #fff;
}
.post-password-form input[type="password"]::placeholder{
  color: #aaa;
}
.post-password-form input[type="password"]:focus{
  border-color: #04caff;
  outline: none;
  box-shadow: 0 0 0 3px rgba(4,202,255,0.2);
  background-color: #fff;
}
.post-password-form input[type="submit"]{
  display: inline-block;
  margin-top: 16px;
  padding: 10px 28px;
  border: none;
  border-radius: 6px;
  background: linear-gradient(90deg, #90f59a, #04caff);
  color: #fff;
  font-weight: 700;
  cursor: pointer;
  font-size: 15px;
  transition: opacity .25s ease, transform .15s ease;
}
.post-password-form input[type="submit"]:hover{
  opacity: .85;
  transform: translateY(-2px);
}
.post-password-form input[type="submit"]:active{
  transform: translateY(0);
}
.entry-content .post-password-form p:first-child{
  margin-top: 0;
}
.entry-content .post-password-form p:last-child{
  margin-bottom: 0;
}
@media (max-width: 600px){
  .post-password-form{
    width: 92%;
    padding: 24px 20px;
    margin: 40px auto;
  }
}