*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --blue-900:#142B41;
  --blue-800:#1E3A5F;
  --blue-100:#E8EDF2;
  --amber:#F5A623;
  --amber-light:#FEF3D5;
  --teal:#2DD4BF;
  --teal-dark:#14B8A6;
  --bg:#F5F7FA;
  --white:#FFFFFF;
  --text:#1A1A2E;
  --muted:#64748B;
  --border:#D6DEE7;
  --error:#EF4444;
  --radius:12px;
  --radius-sm:8px;
  --shadow:0 2px 12px rgba(20,43,65,0.08);
  --font-display:'Outfit',sans-serif;
  --font-body:'Inter',sans-serif;
  --max-w:640px;
  --transition:0.3s cubic-bezier(0.4,0,0.2,1)
}
html{font-size:16px;scroll-behavior:smooth}
body{
  font-family:var(--font-body);
  color:var(--text);
  background:var(--bg);
  line-height:1.6;
  -webkit-font-smoothing:antialiased
}
a{color:var(--blue-800);text-decoration:none}
a:hover{text-decoration:underline}
sup{font-size:0.65em}

.app{min-height:100vh;display:flex;flex-direction:column}

/* ── Header ── */
.header{
  background:var(--blue-900);
  color:var(--white);
  padding:0 20px;
  position:sticky;top:0;z-index:10
}
.header-inner{
  max-width:var(--max-w);
  margin:0 auto;
  display:flex;align-items:center;
  height:56px;gap:12px
}
.header-logo{
  font-family:var(--font-display);
  font-weight:700;font-size:1.25rem;
  letter-spacing:-0.02em
}
.header-badge{
  font-size:0.7rem;font-weight:600;
  background:rgba(255,255,255,0.15);
  padding:2px 10px;border-radius:20px;
  text-transform:uppercase;letter-spacing:0.05em
}

/* ── Main ── */
.main{
  flex:1;padding:40px 20px 60px;
  display:flex;justify-content:center
}
.survey{
  width:100%;max-width:var(--max-w);
  position:relative
}

/* ── Progress ── */
.progress{margin-bottom:36px}
.progress-dots{
  display:flex;justify-content:center;gap:8px;
  transition:opacity var(--transition)
}
.progress-dot{
  width:32px;height:4px;border-radius:4px;
  background:var(--border);
  transition:background var(--transition),transform var(--transition);
  cursor:default
}
.progress-dot.active{background:var(--amber)}
.progress-dot.done{background:var(--teal)}

/* ── Steps ── */
.step{display:none}
.step.active{display:block;animation:fadeIn 0.35s ease}
@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}
.step-content{background:var(--white);border-radius:var(--radius);padding:36px 32px;box-shadow:var(--shadow)}
.step-title{
  font-family:var(--font-display);
  font-weight:600;font-size:1.35rem;
  line-height:1.35;margin-bottom:8px
}
.step-title-sm{font-size:1.1rem;margin-top:24px}
.optional{font-weight:400;color:var(--muted);font-size:0.9rem}
.step-desc{color:var(--muted);font-size:0.9rem;margin-bottom:20px}
.step-desc-sm{font-size:0.82rem;margin-top:-8px;margin-bottom:24px}
.step-error{color:var(--error);font-size:0.85rem;min-height:1.4em;margin-top:12px}

/* ── Buttons ── */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  font-family:var(--font-body);font-weight:500;font-size:0.9rem;
  border:none;border-radius:var(--radius-sm);
  cursor:pointer;padding:10px 24px;
  transition:background var(--transition),transform 0.15s,box-shadow var(--transition)
}
.btn:active{transform:scale(0.97)}
.btn-primary{
  background:var(--blue-900);color:var(--white)
}
.btn-primary:hover{background:var(--blue-800);box-shadow:0 4px 12px rgba(20,43,65,0.25)}
.btn-ghost{
  background:transparent;color:var(--muted)
}
.btn-ghost:hover{background:var(--blue-100);color:var(--text)}
.btn-lg{padding:14px 32px;font-size:1rem}
.btn-full{width:100%}
.btn:disabled{opacity:0.5;cursor:not-allowed;transform:none}

/* ── Navigation ── */
.nav{
  display:flex;justify-content:space-between;
  margin-top:20px;gap:12px
}
.nav .btn{flex:1}

/* ── Subject Cards ── */
.subjects-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:10px
}
.subject-card{
  font-family:var(--font-body);font-size:0.88rem;font-weight:500;
  padding:16px 14px;border:2px solid var(--border);
  border-radius:var(--radius-sm);background:var(--white);
  cursor:pointer;text-align:center;line-height:1.3;
  transition:border-color var(--transition),background var(--transition),box-shadow var(--transition);
  color:var(--text)
}
.subject-card:hover{border-color:var(--blue-800);background:var(--blue-100)}
.subject-card.selected{
  border-color:var(--amber);background:var(--amber-light);
  box-shadow:0 0 0 3px rgba(245,166,35,0.2)
}

/* ── Rank List ── */
.rank-list{display:flex;flex-direction:column;gap:8px}
.rank-item{
  display:flex;align-items:center;gap:12px;
  padding:14px 16px;background:var(--bg);
  border-radius:var(--radius-sm);
  transition:background var(--transition)
}
.rank-number{
  width:28px;height:28px;border-radius:50%;
  background:var(--blue-900);color:var(--white);
  display:flex;align-items:center;justify-content:center;
  font-size:0.8rem;font-weight:600;flex-shrink:0
}
.rank-label{flex:1;font-weight:500;font-size:0.92rem}
.rank-arrows{display:flex;flex-direction:column;gap:2px}
.rank-arrow{
  width:28px;height:22px;border:none;
  background:var(--white);border:1px solid var(--border);
  border-radius:4px;cursor:pointer;font-size:0.7rem;
  display:flex;align-items:center;justify-content:center;
  color:var(--muted);transition:background var(--transition),color var(--transition)
}
.rank-arrow:hover{background:var(--blue-100);color:var(--text)}
.rank-arrow:active{transform:scale(0.93)}

/* ── Textarea ── */
.textarea{
  width:100%;font-family:var(--font-body);font-size:0.92rem;
  padding:14px;border:2px solid var(--border);
  border-radius:var(--radius-sm);resize:vertical;min-height:100px;
  transition:border-color var(--transition)
}
.textarea:focus{outline:none;border-color:var(--blue-800)}
.word-count{text-align:right;font-size:0.78rem;color:var(--muted);margin-top:6px}

/* ── Divider ── */
.divider{border:none;border-top:1px solid var(--border);margin:24px 0}

/* ── Fields ── */
.field{margin-bottom:16px}
.field-label{display:block;font-weight:500;font-size:0.88rem;margin-bottom:6px}
.field-hint{font-size:0.85rem;color:var(--muted);margin-top:6px}
.input{
  width:100%;font-family:var(--font-body);font-size:0.92rem;
  padding:12px 14px;border:2px solid var(--border);
  border-radius:var(--radius-sm);
  transition:border-color var(--transition)
}
.input:focus{outline:none;border-color:var(--blue-800)}

/* ── Autocomplete ── */
.autocomplete{position:relative}
.autocomplete-list{
  position:absolute;top:100%;left:0;right:0;
  background:var(--white);border:1px solid var(--border);
  border-radius:var(--radius-sm);max-height:200px;
  overflow-y:auto;display:none;z-index:20;
  box-shadow:0 8px 24px rgba(0,0,0,0.1)
}
.autocomplete-list.open{display:block}
.autocomplete-item{
  padding:10px 14px;cursor:pointer;font-size:0.88rem;
  border-bottom:1px solid var(--bg);
  transition:background var(--transition)
}
.autocomplete-item:last-child{border-bottom:none}
.autocomplete-item:hover,.autocomplete-item.highlighted{background:var(--blue-100)}

/* ── Checkbox ── */
.checkbox-field{
  display:flex;align-items:flex-start;gap:10px;
  padding:14px;background:var(--amber-light);
  border-radius:var(--radius-sm);cursor:pointer;
  border:2px solid transparent;transition:border-color var(--transition)
}
.checkbox-field.has-check{border-color:var(--amber)}
.checkbox-field input[type="checkbox"]{
  width:18px;height:18px;margin-top:3px;flex-shrink:0;
  accent-color:var(--amber);cursor:pointer
}
.checkbox-label{font-size:0.88rem;line-height:1.5}

/* ── Review ── */
.review{display:flex;flex-direction:column;gap:16px;margin-bottom:24px}
.review-section{}
.review-section-title{
  font-family:var(--font-display);font-weight:600;font-size:0.85rem;
  color:var(--muted);text-transform:uppercase;letter-spacing:0.05em;
  margin-bottom:6px
}
.review-section-body{
  font-size:0.92rem;line-height:1.6
}
.review-section-body ol{margin-left:20px}
.review-section-body li{margin-bottom:2px}

/* ── Done ── */
.step-done{text-align:center;padding:60px 32px}
.done-icon{margin-bottom:20px}
.done-icon svg{display:inline-block}

/* ── Footer ── */
.footer{
  border-top:1px solid var(--border);
  padding:16px 20px;font-size:0.8rem;color:var(--muted)
}
.footer-inner{
  max-width:var(--max-w);margin:0 auto;
  display:flex;justify-content:space-between;align-items:center
}
.footer a{color:var(--muted)}
.footer a:hover{color:var(--text)}
.footer-links{display:flex;align-items:center;gap:6px}
.sep{color:var(--border)}

/* ── Responsive ── */
@media(max-width:480px){
  .step-content{padding:24px 20px}
  .subjects-grid{grid-template-columns:1fr}
  .subject-card{padding:14px 12px}
  .nav{flex-direction:column}
  .nav .btn{flex:none}
  .header-inner{height:48px}
  .main{padding:24px 16px 40px}
  .progress{margin-bottom:24px}
  .footer-inner{flex-direction:column;gap:4px}
}

@media(prefers-reduced-motion:reduce){
  .step.active{animation:none}
  .btn:active{transform:none}
  *,*::before,*::after{transition-duration:0s!important;animation-duration:0s!important}
}