/* ============================================================
   prompt-engineering-case-study.css
   Portfolio wrapper + User Feedback Tool
   ============================================================ */

/* ── Reset ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }

/* ── Portfolio Design Tokens (exact match to ux-jp.com) ── */
:root {
  --ink:         #0D1117;
  --ink-dim:     #6B7280;
  --p-surface:   #FFFFFF;
  --panel:       #F4F5F6;
  --dark:        #0F1B2D;
  --navy:        #1A3A5C;
  --p-blue:      #2563AE;
  --blue:        #2563AE;
  --sky:         #5BA8D9;
  --lime:        #C8E84A;
  --lime-dark:   #A8C832;
  --border-l:    #E5E7EB;
  --radius:      12px;
  --nav-h:       56px;
  --ease-out-expo: cubic-bezier(.16,1,.3,1);
  --ease-spring:   cubic-bezier(.34,1.56,.64,1);
  --ease-gentle:   cubic-bezier(.25,.46,.45,.94);

  --bg:            #F4F5F6;
  --surface:       #FFFFFF;
  --surface-2:     #F4F5F6;
  --surface-3:     #E5E7EB;
  --border:        #E5E7EB;
  --border-2:      #D1D5DB;
  --text:          #0D1117;
  --text-2:        #6B7280;
  --text-3:        #9CA3AF;
  --accent:        #2563AE;
  --accent-glow:   rgba(37,99,174,.10);
  --accent-border: rgba(37,99,174,.28);
  --green:         #059669;
  --red:           #dc2626;
  --red-bg:        rgba(220,38,38,.08);
  --shadow:        0 4px 24px rgba(15,27,45,.12);
  --shadow-sm:     0 2px 8px  rgba(15,27,45,.07);
  --shadow-card:   0 1px 6px  rgba(15,27,45,.08);
  --r:    12px;
  --r-sm: 8px;
  --r-xs: 4px;
}

/* ── Base ──────────────────────────────────────────────── */
body { font-family:'Noto Sans',sans-serif; color:var(--ink); background:var(--p-surface); -webkit-font-smoothing:antialiased; overflow-x:hidden; }
a { text-decoration:none; color:inherit; }

/* ════════════════════════════════════════════════════════
   PORTFOLIO NAV
════════════════════════════════════════════════════════ */
nav#mainNav {
  position:fixed; top:0; left:0; right:0; z-index:300;
  display:flex; align-items:center; justify-content:space-between;
  padding:0 32px; height:var(--nav-h);
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(14px); -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border-l);
  transition:box-shadow .3s var(--ease-out-expo);
  font-family:'Noto Sans',sans-serif;
}
nav#mainNav.scrolled { box-shadow:0 2px 20px rgba(0,0,0,.07); }
.nav-left { display:flex; align-items:center; gap:20px; }
.nav-logo { font-family:'Noto Sans',sans-serif; font-weight:700; font-size:15px; letter-spacing:-.3px; color:var(--ink); display:flex; align-items:center; gap:8px; transition:opacity .2s; }
.nav-logo:hover { opacity:.75; }
.nav-logo span { display:inline-block; width:20px; height:20px; border:2px solid var(--ink); border-radius:4px; }
.nav-status { display:flex; align-items:center; gap:6px; font-size:13px; color:var(--ink-dim); }
.status-dot { width:7px; height:7px; border-radius:50%; background:#22C55E; animation:pulse 2s ease-in-out infinite; }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.4} }
.nav-links { display:flex; align-items:center; gap:28px; }
.nav-links a { font-size:14px; color:var(--ink-dim); transition:color .2s; }
.nav-links a:not(.nav-cta) { position:relative; padding-bottom:2px; }
.nav-links a:not(.nav-cta)::after { content:''; position:absolute; bottom:-2px; left:0; width:0; height:1.5px; background:var(--lime-dark); border-radius:2px; transition:width .25s var(--ease-out-expo); }
.nav-links a:not(.nav-cta):hover { color:var(--ink); }
.nav-links a:not(.nav-cta):hover::after { width:100%; }
.nav-active { font-weight:600; color:var(--ink)!important; }
.nav-active:not(.nav-cta)::after { width:100%!important; }
.nav-cta { font-size:13px; font-weight:600; padding:8px 16px; background:#d0d0d0; color:#000!important; border-radius:8px; transition:background .2s; }
.nav-cta:hover { background:#e1e1e1; }
.hamburger { display:none; flex-direction:column; gap:5px; background:none; border:none; cursor:pointer; padding:4px; }
.hamburger span { display:block; width:22px; height:2px; background:var(--ink); border-radius:2px; transition:transform .25s, opacity .25s; }
.mobile-menu { display:none; flex-direction:column; gap:4px; position:fixed; top:var(--nav-h); left:0; right:0; background:white; padding:20px 32px 24px; border-bottom:1px solid var(--border-l); z-index:290; box-shadow:0 8px 24px rgba(0,0,0,.08); }
.mobile-menu.open { display:flex; }
.mobile-menu a { font-size:16px; color:var(--ink-dim); padding:12px 0; border-bottom:1px solid var(--border-l); transition:color .2s; }
.mobile-menu a:hover { color:var(--ink); }
.mobile-menu a:last-child { border-bottom:none; }
@media (max-width:768px) { .hamburger{display:flex;} .nav-links{display:none;} .nav-status{display:none;} }

/* ════════════════════════════════════════════════════════
   SPLIT LAYOUT
════════════════════════════════════════════════════════ */
.split-page { display:flex; height:calc(100vh - var(--nav-h)); margin-top:var(--nav-h); overflow:hidden; }
.split-left { width:55%; min-width:10%; max-width:90%; overflow-y:auto; overflow-x:hidden; background:var(--bg); flex-shrink:0; scrollbar-width:thin; scrollbar-color:transparent transparent; }
.split-left:hover { scrollbar-color:var(--border-2) transparent; }
.split-handle { width:6px; background:var(--border-l); cursor:col-resize; flex-shrink:0; display:flex; align-items:center; justify-content:center; transition:background .15s; z-index:10; }
.split-handle:hover,.split-handle.dragging { background:var(--lime-dark); }
.handle-grip { display:flex; flex-direction:column; gap:4px; pointer-events:none; }
.handle-grip span { display:block; width:3px; height:3px; border-radius:50%; background:#bbb; }
.split-handle:hover .handle-grip span,.split-handle.dragging .handle-grip span { background:var(--dark); }
.split-right { flex:1; min-width:0; overflow-y:auto; background:var(--p-surface); border-left:1px solid var(--border-l); }

/* ── Right panel ─────────────────────────────────────── */
.explain-content { padding:44px 38px 56px; width:100%; font-family:'Noto Sans',sans-serif; }
.explain-eyebrow { font-size:11px; font-weight:700; letter-spacing:1.5px; text-transform:uppercase; color:var(--ink); margin-bottom:12px; }
.explain-title { font-size:clamp(1.6rem,3vw,3rem); font-weight:800; line-height:1.15; color:var(--dark); letter-spacing:-.5px; margin-bottom:14px; }
.explain-lead { font-size:.9rem; color:var(--ink-dim); line-height:1.75; margin-bottom:20px; }

.explain-thesis {
  padding:16px 20px;
  background:rgba(37,99,174,.06);
  border-left:3px solid var(--p-blue);
  border-radius:0 var(--r-sm) var(--r-sm) 0;
  margin-bottom:28px;
  display:flex; flex-direction:column; gap:10px;
}
.explain-thesis p { font-size:.84rem; color:var(--ink-dim); line-height:1.7; }

.explain-steps { display:flex; flex-direction:column; gap:18px; margin-bottom:32px; }
.step { display:flex; gap:14px; align-items:flex-start; }
.step-num { font-size:.65rem; font-weight:700; letter-spacing:.5px; color:var(--ink-dim); background:var(--panel); border:1.5px solid var(--border-2); border-radius:5px; padding:3px 7px; flex-shrink:0; margin-top:2px; }
.step-body strong { display:block; font-size:.85rem; font-weight:700; color:var(--dark); margin-bottom:4px; }
.step-body p { font-size:.78rem; color:var(--ink-dim); line-height:1.65; margin-bottom:4px; }
.step-body p:last-child { margin-bottom:0; }

.explain-callout { background:var(--dark); border-radius:var(--r); padding:22px 26px; margin-bottom:22px; }
.explain-callout blockquote { font-size:.84rem; color:rgba(255,255,255,.82); line-height:1.75; font-style:italic; margin-bottom:9px; }
.explain-callout cite { font-size:.7rem; color:var(--lime); font-style:normal; font-weight:600; }

.explain-tags { display:flex; flex-wrap:wrap; gap:6px; margin-bottom:36px; }
.explain-tags span { font-size:.68rem; font-weight:600; letter-spacing:.3px; padding:3px 10px; border-radius:20px; background:var(--panel); color:var(--ink-dim); border:1px solid var(--border-l); }

/* ════════════════════════════════════════════════════════
   CONTACT FORM
════════════════════════════════════════════════════════ */
.contact-section { border-top:1px solid var(--border-l); padding-top:36px; }
.contact-heading { font-family:'Noto Sans',sans-serif; font-size:clamp(24px,3vw,36px); font-weight:700; color:var(--ink); letter-spacing:-1px; line-height:1.1; margin-bottom:8px; }
.contact-sub { font-size:15px; line-height:1.8; color:var(--ink-dim); margin-bottom:28px; }
.contact-form { display:flex; flex-direction:column; gap:14px; }
.form-row { display:grid; grid-template-columns:1fr 1fr; gap:14px; }
.form-group { display:flex; flex-direction:column; }
.form-group--select { position:relative; }
.form-input, .form-select, .form-textarea { width:100%; padding:14px 16px; font-family:'Noto Sans',sans-serif; font-size:14px; color:var(--ink); background:var(--panel); border:1.5px solid transparent; border-radius:var(--radius); outline:none; transition:border-color .2s, background .2s, box-shadow .2s; appearance:none; -webkit-appearance:none; }
.form-input::placeholder, .form-textarea::placeholder { color:var(--ink-dim); }
.form-input:focus, .form-select:focus, .form-textarea:focus { border-color:var(--blue); background:var(--surface); box-shadow:0 0 0 3px rgba(37,99,174,.08); }
.form-input.input-error { border-color:#EF4444; animation:shake .35s ease; }
@keyframes shake { 0%,100%{transform:translateX(0)} 25%{transform:translateX(-6px)} 75%{transform:translateX(6px)} }
.form-select { padding-right:40px; cursor:pointer; }
.select-chevron { position:absolute; right:14px; top:50%; transform:translateY(-50%); color:var(--ink-dim); pointer-events:none; }
.form-textarea { resize:vertical; min-height:120px; line-height:1.65; }
.btn-submit { display:inline-flex; align-items:center; justify-content:center; gap:10px; width:100%; padding:14px 24px; background:var(--lime); color:var(--ink); font-family:'Noto Sans',sans-serif; font-size:15px; font-weight:600; border:none; border-radius:10px; cursor:pointer; transition:background .2s, transform .2s var(--ease-spring), box-shadow .2s; margin-top:4px; }
.btn-submit:hover:not(:disabled) { background:var(--lime-dark); transform:translateY(-2px); box-shadow:0 6px 20px rgba(168,200,50,.3); }
.btn-submit:active:not(:disabled) { transform:translateY(0); }
.btn-submit:disabled { opacity:.65; cursor:not-allowed; }
.form-success { display:none; align-items:center; gap:10px; padding:16px 20px; background:rgba(34,197,94,.07); border:1px solid rgba(34,197,94,.2); border-radius:var(--radius); font-size:15px; color:var(--ink); line-height:1.65; margin-top:4px; }
.form-success.visible { display:flex; }
@media (max-width:500px) { .form-row { grid-template-columns:1fr; } }

/* ════════════════════════════════════════════════════════
   APP SHELL
════════════════════════════════════════════════════════ */
.app-shell { display:flex; flex-direction:column; min-height:100%; font-family:'Outfit',sans-serif; }

/* App Header */
.app-header { display:flex; align-items:center; justify-content:space-between; gap:8px; padding:10px 16px; background:var(--dark); position:sticky; top:0; z-index:100; }
.header-left { display:flex; align-items:center; gap:12px; flex-shrink:0; }
.header-right { display:flex; align-items:center; gap:7px; flex-shrink:0; }
.logo { display:flex; align-items:center; gap:8px; user-select:none; }
.logo-icon { width:30px; height:30px; flex-shrink:0; }
.logo-text { font-size:.88rem; font-weight:700; letter-spacing:-.3px; color:#fff; font-family:'Outfit',sans-serif; }

/* Shared button base */
.btn { display:inline-flex; align-items:center; gap:5px; padding:6px 12px; border-radius:var(--r-sm); font-family:'Outfit',sans-serif; font-size:.78rem; font-weight:500; cursor:pointer; border:1.5px solid transparent; transition:background .15s, border-color .15s, transform .1s; white-space:nowrap; line-height:1.3; }
.btn:active { transform:scale(.97); }
.btn-ghost { background:rgba(255,255,255,.08); color:rgba(255,255,255,.8); border-color:rgba(255,255,255,.18); }
.btn-ghost:hover { background:rgba(255,255,255,.15); color:#fff; border-color:rgba(255,255,255,.3); }
.btn-primary-app { background:var(--lime); color:var(--dark); border-color:var(--lime); font-weight:700; }
.btn-primary-app:hover { background:var(--lime-dark); border-color:var(--lime-dark); }

/* Toast */
.toast { position:fixed; bottom:22px; left:50%; transform:translateX(-50%) translateY(80px); background:var(--dark); border:1px solid var(--border-2); color:#fff; padding:9px 18px; border-radius:30px; font-family:'Outfit',sans-serif; font-size:.82rem; font-weight:500; box-shadow:var(--shadow); opacity:0; transition:opacity .25s, transform .25s; pointer-events:none; z-index:9999; white-space:nowrap; }
.toast.show { opacity:1; transform:translateX(-50%) translateY(0); }

/* Modal (reused for admin export) */
.modal-overlay { position:fixed; inset:0; background:rgba(15,27,45,.5); backdrop-filter:blur(4px); display:flex; align-items:center; justify-content:center; z-index:500; }
.modal-box { background:var(--surface); border:1.5px solid var(--border-2); border-radius:var(--r); padding:24px; width:360px; max-width:92vw; box-shadow:var(--shadow); }
.modal-title { font-size:.95rem; font-weight:700; margin-bottom:8px; font-family:'Outfit',sans-serif; color:var(--text); }
.modal-body  { font-size:.84rem; color:var(--text-2); margin-bottom:8px; line-height:1.65; font-family:'Outfit',sans-serif; }
.modal-actions { display:flex; justify-content:flex-end; gap:8px; margin-top:16px; }

/* Modal buttons (light context) */
.fb-modal-btn {
  font-family:'Outfit',sans-serif; font-size:.78rem; font-weight:600;
  padding:7px 14px; border-radius:var(--r-sm); cursor:pointer;
  border:1.5px solid var(--border-2); background:var(--surface-2); color:var(--text-2);
  transition:all .15s;
}
.fb-modal-btn:hover { background:var(--surface-3); color:var(--text); border-color:var(--text-3); }
.fb-modal-primary { background:var(--p-blue); color:#fff; border-color:var(--p-blue); }
.fb-modal-primary:hover { background:#1d4e9a; border-color:#1d4e9a; color:#fff; }

/* Scrollbar */
::-webkit-scrollbar { width:5px; height:5px; }
::-webkit-scrollbar-track { background:transparent; }
::-webkit-scrollbar-thumb { background:var(--border-2); border-radius:4px; }
::-webkit-scrollbar-thumb:hover { background:var(--text-3); }

/* ════════════════════════════════════════════════════════
   FEEDBACK TOOL — embedded in split-left
════════════════════════════════════════════════════════ */

/* Progress rail */
.fb-progress-rail { height:3px; background:var(--border); }
.fb-progress-bar  { height:100%; width:0%; background:linear-gradient(90deg,var(--p-blue),var(--lime)); border-radius:0 2px 2px 0; transition:width .4s var(--ease-out-expo); }

/* Step track in app header */
.fb-step-track { flex:1; display:flex; align-items:center; justify-content:center; gap:0; padding:0 8px; }
.fb-pip { display:flex; flex-direction:column; align-items:center; gap:2px; }
.fb-pip-circle { width:24px; height:24px; border-radius:50%; border:1.5px solid rgba(255,255,255,.2); background:rgba(255,255,255,.07); display:flex; align-items:center; justify-content:center; font-family:'Outfit',sans-serif; font-size:.65rem; font-weight:700; color:rgba(255,255,255,.35); transition:all .22s var(--ease-out-expo); }
.fb-pip-label { font-size:.5rem; font-weight:600; letter-spacing:.05em; text-transform:uppercase; color:rgba(255,255,255,.25); white-space:nowrap; transition:color .22s; }
.fb-connector { width:24px; height:1.5px; background:rgba(255,255,255,.12); margin:0 3px 16px; flex-shrink:0; transition:background .22s; }
.fb-pip.fb-pip-active .fb-pip-circle { background:var(--lime); border-color:var(--lime-dark); color:var(--dark); box-shadow:0 0 0 3px rgba(200,232,74,.2); }
.fb-pip.fb-pip-active .fb-pip-label { color:rgba(255,255,255,.85); }
.fb-pip.fb-pip-done  .fb-pip-circle { background:rgba(37,99,174,.7); border-color:var(--p-blue); color:#fff; }
.fb-pip.fb-pip-done  .fb-pip-label { color:rgba(255,255,255,.5); }
.fb-pip.fb-pip-done + .fb-connector { background:rgba(37,99,174,.4); }

/* Screens */
.fb-screen { display:none; }
.fb-screen.fb-active { display:block; animation:fbIn .28s var(--ease-out-expo) both; }
.fb-screen.fb-back   { animation:fbBack .28s var(--ease-out-expo) both; }
@keyframes fbIn   { from{opacity:0;transform:translateX(20px)} to{opacity:1;transform:translateX(0)} }
@keyframes fbBack { from{opacity:0;transform:translateX(-20px)} to{opacity:1;transform:translateX(0)} }

/* Welcome and Done fill the full split-left height */
#screenWelcome.fb-active,
#screenDone.fb-active {
  display:flex;
  flex-direction:column;
  flex:1;
  min-height:0;
}

/* Welcome screen — full-height, designed */
.fb-welcome {
  flex:1;
  display:flex;
  flex-direction:column;
  justify-content:center;
  padding:48px 32px 40px;
  background:var(--surface);
  position:relative;
  overflow:hidden;
}

/* Decorative rings — CSS only, no images */
.fb-deco { position:absolute; inset:0; pointer-events:none; overflow:hidden; }
.fb-deco-r1 {
  position:absolute; border-radius:50%;
  width:480px; height:480px;
  border:1px solid var(--border-l);
  top:-180px; right:-140px;
}
.fb-deco-r2 {
  position:absolute; border-radius:50%;
  width:300px; height:300px;
  border:1px solid rgba(37,99,174,.10);
  top:-60px; right:-30px;
}
.fb-deco-r3 {
  position:absolute; border-radius:50%;
  width:140px; height:140px;
  border:1.5px solid rgba(200,232,74,.35);
  top:60px; right:60px;
}
.fb-deco-d1 { position:absolute; width:10px; height:10px; border-radius:50%; background:var(--lime); top:210px; right:200px; opacity:.7; }
.fb-deco-d2 { position:absolute; width:6px;  height:6px;  border-radius:50%; background:var(--p-blue); top:310px; right:120px; opacity:.45; }
.fb-deco-d3 { position:absolute; width:8px;  height:8px;  border-radius:50%; background:var(--sky); bottom:100px; left:20px; opacity:.35; }

.fb-welcome-inner { position:relative; z-index:1; max-width:460px; }

.fb-tag {
  display:inline-block; font-family:'Outfit',sans-serif; font-size:.65rem;
  font-weight:700; letter-spacing:.09em; text-transform:uppercase;
  color:var(--dark); background:var(--lime); border-radius:30px;
  padding:4px 13px; margin-bottom:20px;
}
.fb-welcome-title {
  font-family:'Noto Sans',sans-serif;
  font-size:clamp(1.8rem,3.5vw,2.6rem);
  font-weight:800; color:var(--ink); line-height:1.1;
  letter-spacing:-.03em; margin-bottom:14px;
}
.fb-accent {
  color:var(--p-blue);
  position:relative;
  display:inline-block;
}
.fb-accent::after {
  content:'';
  position:absolute;
  bottom:1px; left:0; right:0;
  height:3px;
  background:var(--lime);
  border-radius:2px;
}
.fb-welcome-sub {
  font-family:'Outfit',sans-serif; font-size:.9rem;
  color:var(--ink-dim); line-height:1.7; margin-bottom:20px; max-width:400px;
}
.fb-checklist {
  list-style:none; display:flex; flex-direction:column;
  gap:.6rem; margin-bottom:28px;
}
.fb-checklist li {
  display:flex; align-items:center; gap:.65rem;
  font-family:'Outfit',sans-serif; font-size:.85rem; color:var(--ink-dim);
}
.fb-tick {
  width:20px; height:20px; border-radius:50%;
  border:1.5px solid var(--lime-dark);
  background:rgba(168,200,50,.14);
  display:inline-flex; align-items:center; justify-content:center;
  font-size:.6rem; font-weight:700; color:var(--lime-dark); flex-shrink:0;
}
.fb-start-btn { font-size:.9rem; padding:10px 24px; letter-spacing:.01em; }
.fb-arr { transition:transform .2s var(--ease-spring); display:inline-block; }
.fb-start-btn:hover .fb-arr { transform:translateX(5px); }
.fb-fine {
  margin-top:14px; font-family:'Outfit',sans-serif;
  font-size:.7rem; color:var(--text-3); line-height:1.55;
}

/* Step content wrapper */
.fb-step-wrap { padding:22px 20px 30px; }
.fb-step-hd { margin-bottom:20px; padding-left:14px; border-left:3px solid var(--lime); }
.fb-badge { display:inline-block; font-family:'Outfit',sans-serif; font-size:.6rem; font-weight:800; letter-spacing:.1em; text-transform:uppercase; color:var(--lime); background:var(--dark); border-radius:4px; padding:3px 9px; margin-bottom:10px; }
.fb-step-title { font-family:'Noto Sans',sans-serif; font-size:1.25rem; font-weight:800; color:var(--ink); line-height:1.15; letter-spacing:-.025em; margin-bottom:7px; }
.fb-step-sub { font-family:'Outfit',sans-serif; font-size:.82rem; color:var(--text-2); line-height:1.65; }
.fb-step-sub strong { color:var(--navy); font-weight:600; }

/* Legend (step 2) */
.fb-legend { display:flex; gap:14px; margin-top:10px; flex-wrap:wrap; }
.fb-legend span { display:flex; align-items:center; gap:6px; font-family:'Outfit',sans-serif; font-size:.72rem; color:var(--text-2); }
.fb-ld { width:9px; height:9px; border-radius:2px; flex-shrink:0; }
.fb-ld-no  { background:var(--ink-dim); }
.fb-ld-mid { background:var(--sky); }
.fb-ld-yes { background:var(--p-blue); }

/* Mini progress (step 2) */
.fb-mini-prog { margin-top:12px; padding-top:12px; border-top:1px solid var(--border); }
.fb-mini-lbl { font-family:'Outfit',sans-serif; font-size:.68rem; font-weight:600; color:var(--text-3); display:block; margin-bottom:5px; }
.fb-mini-track { height:4px; background:var(--border); border-radius:10px; overflow:hidden; }
.fb-mini-fill  { height:100%; width:0%; background:var(--p-blue); border-radius:10px; transition:width .3s var(--ease-out-expo); }

/* Form card */
.fb-card {
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--r);
  box-shadow:0 2px 12px rgba(15,27,45,.08), 0 1px 3px rgba(15,27,45,.05);
  overflow:hidden; margin-bottom:16px;
}

/* Fields */
.fb-row-two { display:grid; grid-template-columns:1fr 1fr; gap:0; }
.fb-row-two .fb-field { padding:16px 16px 12px; border-right:1px solid var(--border); }
.fb-row-two .fb-field:last-child { border-right:none; }
.fb-field { padding:0 16px 14px; border-bottom:1px solid var(--border); }
.fb-field:last-child,.fb-field.fb-field-pad { border-bottom:none; }
.fb-field.fb-field-pad { padding:12px 16px 16px; }
.fb-field.fb-field-solo { padding:16px; border-bottom:none; }

.fb-field label {
  display:block; font-family:'Outfit',sans-serif; font-size:.63rem; font-weight:700;
  letter-spacing:.06em; text-transform:uppercase; color:var(--text-2); margin-bottom:7px;
}
.fb-opt { font-weight:400; text-transform:none; letter-spacing:0; font-size:.63rem; color:var(--text-3); }

.fb-field input[type="text"],
.fb-field textarea,
.fb-qt textarea {
  width:100%; font-family:'Outfit',sans-serif; font-size:.86rem; color:var(--text);
  background:var(--panel);
  border:none;
  border-radius:var(--r-sm);
  padding:.6rem .85rem;
  transition:background .16s, box-shadow .16s;
  resize:vertical; line-height:1.55; outline:none;
}
.fb-field input::placeholder, .fb-field textarea::placeholder,
.fb-qt textarea::placeholder { color:var(--text-3); font-family:'Outfit',sans-serif; }
.fb-field input:focus, .fb-field textarea:focus, .fb-qt textarea:focus {
  background:var(--surface-2);
  box-shadow:0 0 0 2px var(--accent-border);
}

/* Likert card */
.fb-likert-card { padding:0; }
.fb-li { padding:10px 14px; border-bottom:1px solid var(--border); transition:background .15s; }
.fb-li:last-child { border-bottom:none; }
.fb-li.fb-answered { background:rgba(37,99,174,.03); }
.fb-li.fb-unanswered { background:rgba(220,38,38,.04); border-left:3px solid var(--red); }
.fb-li-section { font-family:'Outfit',sans-serif; font-size:.58rem; font-weight:800; letter-spacing:.09em; text-transform:uppercase; color:var(--p-blue); display:block; margin-bottom:4px; }
.fb-li-q { font-family:'Noto Sans',sans-serif; font-size:.8rem; font-weight:500; color:var(--text); line-height:1.5; margin-bottom:8px; }
.fb-li-qnum { font-family:'Outfit',sans-serif; font-size:.6rem; font-weight:700; color:var(--text-3); margin-right:4px; }
.fb-li-btns { display:grid; grid-template-columns:repeat(7,1fr); gap:4px; }
.fb-lbtn {
  font-family:'Outfit',sans-serif; font-size:.75rem; font-weight:700;
  border:1.5px solid var(--border-2); border-radius:var(--r-sm);
  background:var(--surface); color:var(--text-3);
  padding:.45rem .15rem; cursor:pointer;
  display:flex; flex-direction:column; align-items:center; gap:3px;
  transition:all .14s var(--ease-out-expo); line-height:1;
}
.fb-lbtn:hover { border-color:var(--p-blue); color:var(--p-blue); background:var(--accent-glow); transform:translateY(-1px); }
.fb-lbtn .fb-ldot { width:5px; height:5px; border-radius:50%; background:var(--border-2); transition:background .14s; }
.fb-lbtn .fb-lnum { font-size:.78rem; }
/* Selected states */
.fb-lbtn.fb-sel-low  { background:#fef2f2; border-color:#fca5a5; color:#dc2626; transform:translateY(-1px); }
.fb-lbtn.fb-sel-low  .fb-ldot { background:#dc2626; }
.fb-lbtn.fb-sel-mid  { background:rgba(91,168,217,.1); border-color:var(--sky); color:var(--navy); transform:translateY(-1px); }
.fb-lbtn.fb-sel-mid  .fb-ldot { background:var(--sky); }
.fb-lbtn.fb-sel-high { background:rgba(37,99,174,.1); border-color:var(--p-blue); color:var(--p-blue); transform:translateY(-1px); }
.fb-lbtn.fb-sel-high .fb-ldot { background:var(--p-blue); }
.fb-li-err { font-family:'Outfit',sans-serif; font-size:.65rem; color:var(--red); font-weight:500; margin-top:5px; display:none; }
.fb-li.fb-unanswered .fb-li-err { display:block; }

/* Qualitative card */
.fb-qual-card { padding:0; }
.fb-qb {
  display:flex; align-items:flex-start; gap:12px;
  padding:14px 16px; border-bottom:1px solid var(--border);
  transition:background .15s;
}
.fb-qb.fb-qb-last { border-bottom:none; }
.fb-qb:hover { background:rgba(37,99,174,.025); }
.fb-qi {
  width:30px; height:30px; border-radius:var(--r-xs);
  display:flex; align-items:center; justify-content:center;
  font-family:'Outfit',sans-serif; font-size:.78rem; font-weight:800;
  flex-shrink:0; margin-top:20px;
  box-shadow:0 1px 3px rgba(0,0,0,.08);
}
.fb-qi-good   { background:rgba(5,150,105,.12);  color:#059669; }
.fb-qi-bad    { background:rgba(220,38,38,.10);   color:#dc2626; }
.fb-qi-miss   { background:rgba(91,168,217,.15);  color:#1A3A5C; }
.fb-qi-change { background:rgba(37,99,174,.12);   color:#2563AE; }
.fb-qt { flex:1; }
.fb-qt label {
  display:block; font-family:'Outfit',sans-serif; font-size:.72rem;
  font-weight:600; color:var(--text-2); margin-bottom:7px;
  line-height:1.45;
}

/* Review card (step 4) */
.fb-review-card { background:var(--surface); border:1.5px solid var(--border); border-radius:var(--r-sm); overflow:hidden; margin-top:14px; }
.fb-review-hd { font-family:'Outfit',sans-serif; font-size:.6rem; font-weight:800; letter-spacing:.08em; text-transform:uppercase; color:var(--text-3); padding:7px 12px; border-bottom:1px solid var(--border); background:var(--surface-2); }
.fb-review-row { display:flex; align-items:baseline; gap:.5rem; padding:.45rem .75rem; border-bottom:1px solid var(--border); font-family:'Outfit',sans-serif; font-size:.75rem; }
.fb-review-row:last-child { border-bottom:none; }
.fb-review-lbl { font-size:.6rem; font-weight:700; letter-spacing:.04em; text-transform:uppercase; color:var(--text-3); flex-shrink:0; min-width:76px; }
.fb-review-val   { color:var(--ink); font-weight:500; }
.fb-review-empty { color:var(--text-3); font-style:italic; }
.fb-text-btn { display:inline-block; margin-top:8px; font-family:'Outfit',sans-serif; font-size:.74rem; color:var(--p-blue); background:none; border:none; cursor:pointer; padding:.2rem 0; text-decoration:underline; transition:color .15s; }
.fb-text-btn:hover { color:var(--navy); }

/* Step footer buttons */
.fb-footer { display:flex; align-items:center; justify-content:space-between; padding-top:4px; }
.fb-ghost { background:transparent; color:var(--text-2); border:1.5px solid var(--border-2); }
.fb-ghost:hover { background:var(--surface-2); color:var(--ink); border-color:var(--text-3); }

/* Feedback submit button */
.fb-submit-btn { display:inline-flex; align-items:center; gap:7px; font-family:'Outfit',sans-serif; font-size:.85rem; font-weight:700; letter-spacing:.02em; color:var(--dark); background:var(--lime); border:none; border-radius:var(--r-sm); padding:.65rem 1.35rem; cursor:pointer; transition:background .15s, transform .15s, box-shadow .15s; }
.fb-submit-btn:hover { background:var(--lime-dark); transform:translateY(-1px); box-shadow:0 5px 16px rgba(168,200,50,.3); }
.fb-submit-btn:active { transform:translateY(0); }

/* Done screen */
.fb-done {
  flex:1; display:flex; flex-direction:column;
  align-items:center; justify-content:center;
  text-align:center; padding:40px 28px;
  background:var(--surface);
}
.fb-done-icon {
  width:68px; height:68px; background:var(--lime); border-radius:50%;
  display:flex; align-items:center; justify-content:center;
  font-size:1.6rem; font-weight:700; color:var(--dark);
  margin:0 auto 20px;
  box-shadow:0 0 0 10px rgba(200,232,74,.15), 0 4px 20px rgba(168,200,50,.25);
  animation:donePop .5s var(--ease-spring) both;
}
@keyframes donePop { from{opacity:0;transform:scale(.7)} to{opacity:1;transform:scale(1)} }
.fb-done-title {
  font-family:'Noto Sans',sans-serif; font-size:1.8rem; font-weight:800;
  color:var(--ink); letter-spacing:-.03em; margin-bottom:12px;
}
.fb-done-sub {
  font-family:'Outfit',sans-serif; font-size:.86rem; color:var(--text-2);
  line-height:1.7; margin-bottom:24px; max-width:320px;
}
.fb-ghost-light { background:transparent; color:var(--text-2); border:1.5px solid var(--border-2); }
.fb-ghost-light:hover { background:var(--surface-2); color:var(--ink); }

/* ── Responsive ──────────────────────────────────────── */
@media (max-width:768px) {
  nav#mainNav { padding:0 16px; }
  .split-page  { flex-direction:column; height:auto; overflow:visible; }
  .split-left  { width:100%!important; min-width:unset; max-width:unset; height:auto; overflow:visible; }
  .split-handle{ display:none; }
  .split-right { border-left:none; border-top:1px solid var(--border-l); }
  .explain-content { padding:28px 20px 40px; }
  .fb-step-track { display:none; }
  .fb-row-two { grid-template-columns:1fr; }
  .fb-row-two .fb-field { border-right:none; border-bottom:1px solid var(--border); }
  .fb-row-two .fb-field:last-child { border-bottom:none; }
  .fb-li-btns { gap:3px; }
  .fb-lbtn { font-size:.68rem; padding:.4rem .1rem; }
}