/* Multi-step medical history form */
#history-form{--pf-brand:#40C6EC;--pf-dark:#00507B;--pf-ink:#1c3041;--pf-line:#d5e3ec;--pf-bg:#f4f9fc;
  width:100%;max-width:820px;margin:0 auto;padding:2rem;background:#fff;border-radius:16px;
  box-shadow:0 10px 40px rgba(0,80,123,.12);color:var(--pf-ink);text-align:left;box-sizing:border-box}
#history-form *{box-sizing:border-box}
#history-form .pf-progress{display:flex;gap:.5rem;list-style:none;margin:0 0 .5rem;padding:0}
#history-form .pf-progress li{flex:1;height:6px;border-radius:6px;background:var(--pf-line);transition:background .3s}
#history-form .pf-progress li.done,#history-form .pf-progress li.current{background:var(--pf-brand)}
#history-form .pf-count{font-size:.85rem;letter-spacing:.06em;text-transform:uppercase;color:var(--pf-dark);margin:0 0 1.25rem;font-weight:700}
#history-form .pf-step{display:none;border:0;margin:0;padding:0;min-width:0}
#history-form .pf-step.active{display:block;animation:pf-in .3s ease-out}
@keyframes pf-in{from{opacity:0;transform:translateX(14px)}to{opacity:1;transform:none}}
#history-form .pf-step h2{margin:0 0 .25rem;font-size:1.6rem;color:var(--pf-dark)}
#history-form .pf-step .pf-sub{margin:0 0 1.5rem;color:#5b7285}
#history-form .pf-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem 1.25rem}
#history-form .pf-field{display:flex;flex-direction:column;gap:.35rem;width:100%;margin:0}
#history-form .pf-field.full{grid-column:1/-1}
#history-form .pf-field[hidden]{display:none}
#history-form label{font-weight:600;font-size:.95rem;color:var(--pf-ink);margin:0;line-height:1.35}
#history-form input,#history-form select,#history-form textarea{
  width:100%;max-width:100%;margin:0;padding:.8rem 1rem;font:inherit;font-size:1rem;color:var(--pf-ink);
  background:var(--pf-bg);border:1.5px solid var(--pf-line);border-radius:10px;outline:0;
  transition:border-color .2s,box-shadow .2s,background .2s;appearance:none;-webkit-appearance:none;height:auto}
#history-form select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%2300507B' stroke-width='2'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 1rem center;padding-right:2.5rem}
#history-form textarea{min-height:120px;resize:vertical}
#history-form input:focus,#history-form select:focus,#history-form textarea:focus{border-color:var(--pf-brand);background:#fff;box-shadow:0 0 0 4px rgba(64,198,236,.2)}
#history-form input[readonly]{background:#e9f3f8;font-weight:700;color:var(--pf-dark)}
#history-form .pf-invalid{border-color:#d64545!important;box-shadow:0 0 0 4px rgba(214,69,69,.12)!important}
#history-form .pf-error{color:#d64545;font-size:.85rem;margin:0}
#history-form .pf-bmi{display:flex;align-items:center;gap:.75rem}
#history-form .pf-bmi-note{font-size:.85rem;color:#5b7285}
#history-form .pf-nav{display:flex;justify-content:space-between;gap:1rem;margin-top:2rem}
#history-form .pf-btn{cursor:pointer;border:0;border-radius:999px;padding:.9rem 2rem;font:inherit;font-weight:700;font-size:1rem;
  transition:transform .15s,background .2s,box-shadow .2s;min-width:130px;width:auto}
#history-form .pf-btn:active{transform:scale(.97)}
#history-form .pf-next,#history-form .pf-submit{background:var(--pf-brand);color:#fff;box-shadow:0 6px 18px rgba(64,198,236,.4);margin-left:auto}
#history-form .pf-next:hover,#history-form .pf-submit:hover{background:var(--pf-dark)}
#history-form .pf-prev{background:transparent;color:var(--pf-dark);border:1.5px solid var(--pf-line)}
#history-form .pf-prev:hover{border-color:var(--pf-dark)}
#history-form .pf-prev[hidden],#history-form .pf-next[hidden],#history-form .pf-submit[hidden]{display:none}
#history-form .pf-review{background:var(--pf-bg);border-radius:12px;padding:1rem 1.25rem;margin:0 0 1rem;font-size:.95rem}
@media (max-width:640px){#history-form{padding:1.25rem;border-radius:12px}#history-form .pf-grid{grid-template-columns:1fr}
  #history-form .pf-btn{padding:.85rem 1.25rem;min-width:0;flex:1}}