* { font-family: 'DM Sans', sans-serif; }
  h1, h2, h3, .font-display { font-family: 'Syne', sans-serif; }
 
  :root {
    --accent: #2563EB;
    --accent-light: #EFF6FF;
    --accent-dark: #1D4ED8;
    --bg: #F8FAFF;
    --card: #ffffff;
    --text: #0F172A;
    --muted: #64748B;
    --border: #E2E8F0;
    --success: #16A34A;
  }
 
  body { background: var(--bg); }
 
  /* Animated grid background */
  .bg-grid {
    background-image:
      linear-gradient(rgba(37,99,235,0.05) 1px, transparent 1px),
      linear-gradient(90deg, rgba(37,99,235,0.05) 1px, transparent 1px);
    background-size: 40px 40px;
  }
 
  /* Step content animation */
  .step-content {
    animation: slideIn 0.35s cubic-bezier(0.22,1,0.36,1);
  }
  @keyframes slideIn {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: translateY(0); }
  }
 
  /* Progress fill */
  #progress-fill {
    transition: width 0.5s cubic-bezier(0.65, 0, 0.35, 1);
  }
 
  /* Step circle */
  .step-circle {
    transition: background 0.3s, box-shadow 0.3s, transform 0.2s;
  }
  .step-circle.done   { background: var(--accent); color: #fff; }
  .step-circle.active { background: var(--accent); color: #fff; box-shadow: 0 0 0 4px #BFDBFE; transform: scale(1.1); }
  .step-circle.idle   { background: #E2E8F0; color: #94A3B8; }
 
  /* PC card */
  .pc-card input:checked ~ label,
  .sw-card input:checked ~ label {
    border-color: var(--accent);
    background: var(--accent-light);
  }
  .pc-card label, .sw-card label {
    transition: border-color 0.2s, background 0.2s, transform 0.15s;
  }
  .pc-card label:hover, .sw-card label:hover { transform: translateY(-2px); }
 
  /* Input focus */
  input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--accent) !important;
    box-shadow: 0 0 0 3px rgba(37,99,235,0.12);
  }
 
  /* Review badge */
  .review-badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 999px;
    background: var(--accent-light);
    color: var(--accent);
    font-size: 0.78rem;
    font-weight: 600;
  }
 
  /* Submit button loading */
  .btn-submit.loading { pointer-events: none; opacity: 0.7; }
  .spinner {
    display: inline-block;
    width: 18px; height: 18px;
    border: 2px solid rgba(255,255,255,0.4);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    vertical-align: middle;
    margin-right: 8px;
  }
  @keyframes spin { to { transform: rotate(360deg); } }
 
  /* Toast */
  #toast {
    transition: opacity 0.4s, transform 0.4s;
    pointer-events: none;
  }
  #toast.show { opacity: 1 !important; transform: translateY(0) !important; }