@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700&family=JetBrains+Mono:wght@400;700&display=swap');

/* ================================================================
   FE Exam Trainer — Design System v3 "Engineering Terminal"
   ================================================================ */

.fe-shell {
  /* ── Palette ── */
  --fe-bg:          #08111d;
  --fe-surface:     #0d1a27;
  --fe-surface-2:   #112030;
  --fe-surface-3:   #162638;
  --fe-border:      rgba(94,158,220,0.13);
  --fe-border-2:    rgba(94,158,220,0.24);
  --fe-ink:         #cddcec;
  --fe-ink-2:       #7f9bb5;
  --fe-muted:       #435a70;
  --fe-faint:       rgba(94,158,220,0.05);

  /* ── Accent (electric blue) ── */
  --fe-accent:      #3a9eff;
  --fe-accent-bg:   rgba(58,158,255,0.10);
  --fe-accent-h:    #1a82e5;
  --fe-accent-glow: rgba(58,158,255,0.22);

  /* ── States ── */
  --fe-ok:          #00cfa8;
  --fe-ok-bg:       rgba(0,207,168,0.10);
  --fe-ok-border:   rgba(0,207,168,0.32);
  --fe-bad:         #ff5060;
  --fe-bad-bg:      rgba(255,80,96,0.10);
  --fe-bad-border:  rgba(255,80,96,0.32);
  --fe-warn:        #f5a623;

  /* ── Shape ── */
  --fe-r:           8px;
  --fe-r-sm:        5px;

  font-family: 'Outfit', -apple-system, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  color: var(--fe-ink);
  background: var(--fe-bg);
  border: 1px solid rgba(58,158,255,0.18);
  border-radius: 14px;
  box-shadow:
    0 0 0 1px rgba(58,158,255,0.06),
    0 32px 80px rgba(0,0,0,0.75),
    0 4px 20px rgba(0,0,0,0.5);
  min-height: calc(100vh - 48px);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background-image:
    linear-gradient(rgba(58,158,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(58,158,255,0.025) 1px, transparent 1px);
  background-size: 48px 48px;
}

.fe-shell * { box-sizing: border-box; }

/* WP theme overrides */
.fe-shell,
.fe-shell h1, .fe-shell h2, .fe-shell h3, .fe-shell h4,
.fe-shell p, .fe-shell div, .fe-shell span,
.fe-shell label, .fe-shell strong, .fe-shell small {
  color: var(--fe-ink) !important;
}
.fe-shell a { color: var(--fe-accent) !important; text-decoration: none; }
.fe-shell a:hover { text-decoration: underline; }
.fe-muted { color: var(--fe-muted) !important; }

/* ── HEADER ──────────────────────────────────────────────────── */
.fe-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 13px 20px;
  background: rgba(8,17,29,0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--fe-border);
  flex-shrink: 0;
}

.fe-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.fe-brand-icon {
  font-size: 20px;
  line-height: 1;
  filter: drop-shadow(0 0 6px rgba(58,158,255,0.5));
}

.fe-brand-name {
  font-weight: 700;
  font-size: 15px;
  white-space: nowrap;
  letter-spacing: 0.01em;
  color: var(--fe-ink) !important;
}

.fe-brand-topic {
  font-size: 11px;
  color: var(--fe-muted) !important;
  max-width: 200px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 0.04em;
}

.fe-session-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.fe-session-track {
  flex: 1;
  height: 3px;
  background: rgba(94,158,220,0.15);
  border-radius: 999px;
  overflow: hidden;
}

.fe-session-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--fe-accent), #a78bfa);
  border-radius: 999px;
  transition: width 0.4s cubic-bezier(.4,0,.2,1);
  box-shadow: 0 0 8px var(--fe-accent-glow);
}

.fe-session-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--fe-ink-2) !important;
  white-space: nowrap;
  min-width: 36px;
  text-align: right;
  font-family: 'JetBrains Mono', monospace;
}

.fe-status-badge {
  font-size: 11px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--fe-surface-2);
  border: 1px solid var(--fe-border);
  color: var(--fe-muted) !important;
  white-space: nowrap;
  flex-shrink: 0;
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 0.03em;
}

/* ── TOOLBAR ─────────────────────────────────────────────────── */
.fe-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: rgba(13,26,39,0.95);
  border-bottom: 1px solid var(--fe-border);
  flex-wrap: wrap;
  flex-shrink: 0;
}

.fe-toolbar-left {
  display: flex;
  gap: 7px;
  flex: 1;
  min-width: 0;
  flex-wrap: wrap;
  align-items: center;
}

.fe-toolbar-right {
  display: flex;
  gap: 7px;
  flex-wrap: wrap;
  align-items: center;
}

.fe-select,
.fe-input {
  height: 34px;
  border: 1px solid var(--fe-border-2);
  border-radius: var(--fe-r-sm);
  padding: 0 12px;
  font-family: 'Outfit', sans-serif;
  font-size: 13px;
  font-weight: 500;
  background: var(--fe-surface-2);
  color: var(--fe-ink);
  outline: none;
  transition: border-color .15s, box-shadow .15s;
  -webkit-appearance: none;
  appearance: none;
}

.fe-select {
  min-width: 170px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%23475f75' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 28px;
}

.fe-input { width: 64px; text-align: center; }

.fe-select:focus, .fe-input:focus {
  border-color: var(--fe-accent);
  box-shadow: 0 0 0 2px var(--fe-accent-bg), 0 0 8px var(--fe-accent-glow);
  background: var(--fe-surface-3);
}

/* ── BUTTONS ─────────────────────────────────────────────────── */
.fe-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  height: 34px;
  padding: 0 14px;
  border: 1px solid transparent;
  border-radius: var(--fe-r-sm);
  font-family: 'Outfit', sans-serif;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: background .15s, border-color .15s, box-shadow .15s, transform .1s, opacity .15s;
  outline: none;
  letter-spacing: 0.01em;
}

.fe-btn:focus-visible { box-shadow: 0 0 0 2px var(--fe-accent-glow); }
.fe-btn:active:not(:disabled) { transform: scale(.97); }
.fe-btn:disabled { opacity: .35; cursor: not-allowed; transform: none !important; }

.fe-btn-primary {
  background: var(--fe-accent);
  color: #fff !important;
  border-color: transparent;
  box-shadow: 0 0 12px rgba(58,158,255,0.25);
}
.fe-btn-primary:hover:not(:disabled) {
  background: var(--fe-accent-h);
  box-shadow: 0 0 18px rgba(58,158,255,0.40);
}

.fe-btn-ghost {
  background: transparent;
  color: var(--fe-ink-2) !important;
  border: 1px solid var(--fe-border-2);
}
.fe-btn-ghost:hover:not(:disabled) {
  background: var(--fe-surface-2);
  border-color: rgba(94,158,220,0.35);
  color: var(--fe-ink) !important;
}

.fe-btn-simulacro {
  background: rgba(124,58,237,0.85);
  color: #fff !important;
  border-color: rgba(124,58,237,0.5);
  box-shadow: 0 0 10px rgba(124,58,237,0.25);
}
.fe-btn-simulacro:hover:not(:disabled) {
  background: #6d28d9;
  box-shadow: 0 0 16px rgba(124,58,237,0.40);
}

.fe-btn-sm { height: 30px; padding: 0 11px; font-size: 12px; }

/* ── MAIN LAYOUT ──────────────────────────────────────────────── */
.fe-main {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.9fr);
  flex: 1;
  min-height: 600px;
}

.fe-question-pane,
.fe-reference-pane {
  display: flex;
  flex-direction: column;
  min-height: 600px;
}

.fe-question-pane { border-right: 1px solid var(--fe-border); background: var(--fe-surface); }
.fe-reference-pane { background: var(--fe-bg); }

.fe-pane-label {
  padding: 7px 18px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--fe-muted) !important;
  border-bottom: 1px solid var(--fe-border);
  background: rgba(8,17,29,0.6);
  flex-shrink: 0;
  font-family: 'JetBrains Mono', monospace;
}

.fe-pane-body {
  padding: 20px;
  flex: 1;
}

.fe-reference-body {
  display: flex;
  flex-direction: column;
  gap: 14px;
  overflow-y: auto;
}

/* ── QUESTION CONTENT ─────────────────────────────────────────── */
.fe-q-meta {
  font-size: 11px;
  color: var(--fe-muted) !important;
  margin-bottom: 10px;
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 0.04em;
}

.fe-q-badges {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.fe-badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
  background: var(--fe-surface-2);
  border: 1px solid var(--fe-border-2);
  color: var(--fe-ink-2) !important;
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 0.04em;
}

.fe-badge-accent {
  background: rgba(58,158,255,0.15);
  border-color: rgba(58,158,255,0.35);
  color: var(--fe-accent) !important;
  box-shadow: 0 0 8px rgba(58,158,255,0.15);
}

.fe-question-text {
  font-size: 16px;
  line-height: 1.75;
  color: var(--fe-ink) !important;
  margin: 14px 0;
  white-space: pre-wrap;
  font-weight: 400;
}

.fe-image-hint {
  padding: 12px 16px;
  border: 1px dashed var(--fe-border-2);
  border-radius: var(--fe-r-sm);
  background: var(--fe-surface-2);
  font-size: 13px;
  color: var(--fe-muted) !important;
  margin: 10px 0;
  line-height: 1.5;
}
.fe-image-hint strong { display: block; margin-bottom: 4px; color: var(--fe-ink-2) !important; }

/* ── IMAGE CAROUSEL ───────────────────────────────────────────── */
.fe-carousel {
  position: relative;
  margin: 12px 0;
  padding: 0 40px 26px;
  touch-action: pan-y;
}
.fe-carousel-stage { position: relative; }
.fe-carousel-slide { display: none; }
.fe-carousel-slide.is-active { display: block; }

.fe-slide-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--fe-muted) !important;
  margin-bottom: 6px;
  font-family: 'JetBrains Mono', monospace;
}

.fe-carousel-stage img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--fe-r);
  border: 1px solid var(--fe-border-2);
  cursor: zoom-in;
  background: #fff;
  box-shadow: 0 6px 24px rgba(0,0,0,0.45);
}

.fe-carousel-arrow {
  position: absolute;
  top: 38%;
  transform: translateY(-50%);
  width: 30px;
  height: 30px;
  border: 1px solid var(--fe-border-2);
  border-radius: 50%;
  background: var(--fe-surface-3);
  color: var(--fe-ink-2) !important;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .15s;
}
.fe-carousel-arrow:hover { background: var(--fe-accent); border-color: var(--fe-accent); color: #fff !important; }
.fe-carousel-arrow:disabled { opacity: .25; cursor: not-allowed; }
.fe-carousel-arrow-left { left: 0; }
.fe-carousel-arrow-right { right: 0; }

.fe-carousel-dots {
  display: flex;
  justify-content: center;
  gap: 6px;
  margin-top: 10px;
}
.fe-carousel-dot {
  width: 6px;
  height: 6px;
  border: none;
  border-radius: 50%;
  background: var(--fe-border-2);
  cursor: pointer;
  padding: 0;
  transition: background .15s, transform .15s;
}
.fe-carousel-dot.is-active {
  background: var(--fe-accent);
  transform: scale(1.35);
  box-shadow: 0 0 6px var(--fe-accent-glow);
}

/* ── OPTIONS ──────────────────────────────────────────────────── */
.fe-options {
  display: flex;
  flex-direction: column;
  gap: 7px;
  margin: 16px 0;
}

.fe-option {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 16px;
  border: 1px solid var(--fe-border-2);
  border-radius: var(--fe-r);
  background: var(--fe-surface-2);
  cursor: pointer;
  transition: border-color .15s, background .15s, box-shadow .15s;
  font-size: 15px;
  line-height: 1.5;
  position: relative;
}

.fe-option:hover:not(.is-disabled) {
  border-color: var(--fe-accent);
  background: var(--fe-surface-3);
  box-shadow: 0 0 0 1px var(--fe-accent-bg), inset 0 0 0 1px rgba(58,158,255,0.08);
}

.fe-option input[type="radio"],
.fe-option input[type="checkbox"] {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  accent-color: var(--fe-accent);
  cursor: pointer;
  margin: 0;
}

.fe-option.is-correct {
  border-color: var(--fe-ok-border) !important;
  background: var(--fe-ok-bg) !important;
  box-shadow: 0 0 0 1px var(--fe-ok-border), inset 0 0 0 1px rgba(0,207,168,0.06) !important;
}

.fe-option.is-wrong {
  border-color: var(--fe-bad-border) !important;
  background: var(--fe-bad-bg) !important;
  box-shadow: 0 0 0 1px var(--fe-bad-border), inset 0 0 0 1px rgba(255,80,96,0.06) !important;
}

.fe-option.is-disabled { cursor: not-allowed; }

.fe-option-marker {
  margin-left: auto;
  flex-shrink: 0;
  font-size: 15px;
  font-weight: 800;
  min-width: 20px;
  text-align: center;
}
.fe-option.is-correct .fe-option-marker { color: var(--fe-ok) !important; }
.fe-option.is-wrong   .fe-option-marker { color: var(--fe-bad) !important; }

.fe-fill-input {
  width: 100%;
  height: 44px;
  border: 1px solid var(--fe-border-2);
  border-radius: var(--fe-r);
  padding: 0 16px;
  font-family: 'Outfit', sans-serif;
  font-size: 15px;
  outline: none;
  background: var(--fe-surface-2);
  color: var(--fe-ink);
  transition: border-color .15s, box-shadow .15s;
}
.fe-fill-input:focus {
  border-color: var(--fe-accent);
  box-shadow: 0 0 0 2px var(--fe-accent-bg), 0 0 8px var(--fe-accent-glow);
}

/* ── QUESTION ACTIONS & FEEDBACK ─────────────────────────────── */
.fe-q-actions { margin-top: 16px; }

.fe-feedback {
  margin-top: 14px;
  padding: 13px 16px;
  border-radius: var(--fe-r);
  border: 1px solid var(--fe-border);
  background: var(--fe-surface-2);
  min-height: 50px;
}
.fe-feedback:empty { display: none; }
[data-fe-next]:disabled { display: none; }
.fe-feedback.ok {
  border-color: var(--fe-ok-border);
  background: var(--fe-ok-bg);
  box-shadow: 0 0 12px rgba(0,207,168,0.08);
}
.fe-feedback.bad {
  border-color: var(--fe-bad-border);
  background: var(--fe-bad-bg);
  box-shadow: 0 0 12px rgba(255,80,96,0.08);
}
.fe-feedback-title {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 6px;
}
.fe-feedback.ok  .fe-feedback-title { color: var(--fe-ok) !important; }
.fe-feedback.bad .fe-feedback-title { color: var(--fe-bad) !important; }
.fe-feedback-detail {
  font-size: 13px;
  color: var(--fe-ink-2) !important;
  margin-top: 4px;
}
.fe-feedback-actions { margin-top: 10px; }

/* ── EMPTY STATES ─────────────────────────────────────────────── */
.fe-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 56px 20px;
  text-align: center;
  height: 100%;
  min-height: 280px;
}
.fe-empty-icon { font-size: 36px; line-height: 1; opacity: 0.5; }
.fe-empty-text {
  color: var(--fe-muted) !important;
  font-size: 13px;
  max-width: 260px;
  line-height: 1.6;
}

/* ── SIMULACRO TIMER ──────────────────────────────────────────── */
.fe-simulacro-timer {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 10px 14px;
  background: var(--fe-surface-2);
  border: 1px solid var(--fe-border-2);
  border-radius: var(--fe-r);
  margin-bottom: 14px;
}
.fe-simulacro-timer-header {
  display: flex;
  align-items: center;
  gap: 6px;
}
.fe-simulacro-icon { font-size: 14px; }
.fe-simulacro-label {
  font-size: 22px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--fe-ink) !important;
  line-height: 1;
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 0.04em;
}
.fe-simulacro-track {
  height: 3px;
  background: var(--fe-border-2);
  border-radius: 99px;
  overflow: hidden;
}
.fe-simulacro-bar {
  height: 100%;
  background: var(--fe-accent);
  border-radius: 99px;
  transition: width .9s linear, background .3s;
  box-shadow: 0 0 6px var(--fe-accent-glow);
}
.fe-simulacro-timer.is-warning .fe-simulacro-bar { background: var(--fe-warn); box-shadow: 0 0 6px rgba(245,166,35,0.4); }
.fe-simulacro-timer.is-warning .fe-simulacro-label { color: var(--fe-warn) !important; }
.fe-simulacro-timer.is-danger  .fe-simulacro-bar { background: var(--fe-bad); box-shadow: 0 0 8px rgba(255,80,96,0.5); }
.fe-simulacro-timer.is-danger  .fe-simulacro-label { color: var(--fe-bad) !important; }

/* ── SESSION COMPLETE ─────────────────────────────────────────── */
.fe-session-mode-badge {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: #fff !important;
  background: rgba(124,58,237,0.85);
  border-radius: 4px;
  padding: 3px 10px;
  margin-bottom: 6px;
  font-family: 'JetBrains Mono', monospace;
  border: 1px solid rgba(124,58,237,0.5);
}
.fe-session-timeout-note {
  font-size: 13px;
  color: var(--fe-bad) !important;
  margin-top: 4px;
}
.fe-session-complete {
  text-align: center;
  padding: 56px 20px;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
}
.fe-session-score {
  font-size: 58px;
  font-weight: 700;
  color: var(--fe-accent) !important;
  line-height: 1;
  font-family: 'JetBrains Mono', monospace;
  text-shadow: 0 0 30px var(--fe-accent-glow);
}
.fe-session-sub {
  font-size: 15px;
  color: var(--fe-ink-2) !important;
  margin-top: 6px;
}
.fe-session-hint {
  font-size: 12px;
  color: var(--fe-muted) !important;
  margin-top: 8px;
}

/* ── REFERENCE PANE ───────────────────────────────────────────── */
.fe-ref-list { display: grid; gap: 2px; }

.fe-ref-row {
  display: flex;
  gap: 10px;
  font-size: 12px;
  padding: 7px 0;
  border-bottom: 1px solid var(--fe-border);
}
.fe-ref-row:last-child { border-bottom: none; }

.fe-ref-key {
  font-weight: 600;
  min-width: 90px;
  flex-shrink: 0;
  color: var(--fe-muted) !important;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.04em;
  padding-top: 1px;
}
.fe-ref-val { color: var(--fe-ink-2) !important; word-break: break-word; }
.fe-ref-empty {
  font-size: 12px;
  color: var(--fe-muted) !important;
  line-height: 1.6;
}

.fe-handbook-box {
  border: 1px solid var(--fe-border-2);
  border-radius: var(--fe-r);
  overflow: hidden;
  background: var(--fe-surface-2);
  flex-shrink: 0;
}
.fe-handbook-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 14px;
  border-bottom: 1px solid var(--fe-border);
  font-size: 12px;
  font-weight: 600;
  background: rgba(8,17,29,0.8);
  color: var(--fe-ink-2) !important;
}
.fe-handbook-frame {
  width: 100%;
  height: min(54vh, 560px);
  border: none;
  display: block;
  background: #fff;
}

/* ── BOTTOM: PROGRESS + ANALYTICS ────────────────────────────── */
.fe-bottom {
  border-top: 1px solid var(--fe-border);
  background: var(--fe-bg);
  flex-shrink: 0;
}
.fe-progress-section {
  padding: 12px 20px;
  border-bottom: 1px solid var(--fe-border);
  font-size: 14px;
}
.fe-progress-header {
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--fe-ink) !important;
  font-size: 13px;
}
.fe-progress-topics { display: flex; flex-wrap: wrap; gap: 5px; }
.fe-progress-chip {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--fe-surface-2);
  border: 1px solid var(--fe-border);
  color: var(--fe-muted) !important;
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 0.02em;
}

.fe-analytics-section { padding: 16px 20px; }

/* ── ANALYTICS ─────────────────────────────────────────────────── */
.fe-an-wrap { display: flex; flex-direction: column; gap: 20px; }

.fe-an-summary {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.fe-an-kpi {
  border: 1px solid var(--fe-border);
  border-radius: var(--fe-r);
  padding: 14px 16px;
  background: var(--fe-surface-2);
  text-align: center;
  transition: border-color .15s;
}
.fe-an-kpi:hover { border-color: var(--fe-border-2); }

.fe-an-kpi-val {
  font-size: 28px;
  font-weight: 700;
  color: var(--fe-accent) !important;
  line-height: 1.1;
  font-family: 'JetBrains Mono', monospace;
  text-shadow: 0 0 20px rgba(58,158,255,0.3);
}
.fe-an-kpi-label {
  font-size: 11px;
  color: var(--fe-muted) !important;
  margin-top: 5px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-family: 'JetBrains Mono', monospace;
}

.fe-an-section-title {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--fe-muted) !important;
  margin-bottom: 12px;
  font-family: 'JetBrains Mono', monospace;
}

.fe-an-row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  align-items: start;
  border: 1px solid var(--fe-border);
  border-radius: var(--fe-r);
  padding: 14px;
  background: var(--fe-surface-2);
}

.fe-sparkline {
  display: flex;
  align-items: flex-end;
  gap: 5px;
  height: 96px;
}

.fe-spark-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  width: 34px;
  height: 100%;
  cursor: default;
}

.fe-spark-pct {
  font-size: 10px;
  font-weight: 700;
  color: var(--fe-ink-2) !important;
  white-space: nowrap;
  font-family: 'JetBrains Mono', monospace;
}

.fe-spark-bar-wrap {
  flex: 1;
  width: 20px;
  background: rgba(94,158,220,0.12);
  border-radius: 3px;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
}

.fe-spark-bar {
  width: 100%;
  border-radius: 3px;
  transition: height .3s ease;
  min-height: 3px;
}

.fe-spark-date {
  font-size: 9px;
  color: var(--fe-muted) !important;
  white-space: nowrap;
  writing-mode: vertical-lr;
  transform: rotate(180deg);
  max-height: 48px;
  overflow: hidden;
  font-family: 'JetBrains Mono', monospace;
}

.fe-an-table-wrap { overflow-x: auto; min-width: 0; }
.fe-an-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}
.fe-an-th {
  text-align: left;
  padding: 4px 8px 7px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--fe-muted) !important;
  border-bottom: 1px solid var(--fe-border);
  white-space: nowrap;
  font-family: 'JetBrains Mono', monospace;
}
.fe-an-td {
  padding: 6px 8px;
  color: var(--fe-ink-2) !important;
  border-bottom: 1px solid var(--fe-border);
  white-space: nowrap;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
}
.fe-an-table tbody tr:last-child .fe-an-td { border-bottom: none; }
.fe-an-table tbody tr:hover .fe-an-td { background: var(--fe-accent-bg); color: var(--fe-ink) !important; }

.fe-an-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.fe-an-col {
  border: 1px solid var(--fe-border);
  border-radius: var(--fe-r);
  padding: 14px;
  background: var(--fe-surface-2);
}

.fe-topic-row { margin-top: 10px; }
.fe-topic-row:first-child { margin-top: 0; }
.fe-topic-row-head {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  margin-bottom: 5px;
  color: var(--fe-ink-2) !important;
}
.fe-topic-row-pct { font-weight: 700; font-family: 'JetBrains Mono', monospace; }
.fe-topic-bar {
  height: 4px;
  border-radius: 999px;
  background: rgba(94,158,220,0.12);
  overflow: hidden;
}
.fe-topic-bar-fill {
  height: 100%;
  border-radius: 999px;
  transition: width .4s cubic-bezier(.4,0,.2,1);
  box-shadow: 0 0 4px currentColor;
}

.fe-hard-q {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 0;
  border-bottom: 1px solid var(--fe-border);
  font-size: 12px;
}
.fe-hard-q:last-child { border-bottom: none; }
.fe-hard-q-label {
  font-weight: 700;
  min-width: 58px;
  flex-shrink: 0;
  color: var(--fe-ink) !important;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
}
.fe-hard-q-topic {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 12px;
  color: var(--fe-ink-2) !important;
}
.fe-hard-q-stat {
  font-weight: 700;
  white-space: nowrap;
  flex-shrink: 0;
  font-size: 11px;
  font-family: 'JetBrains Mono', monospace;
}

/* ── IMAGE MODAL ──────────────────────────────────────────────── */
.fe-modal[hidden] { display: none !important; }
.fe-modal {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0,0,0,.92);
  display: grid;
  grid-template-columns: 56px minmax(0,1fr) 56px;
  align-items: center;
  gap: 8px;
  padding: 16px;
  backdrop-filter: blur(4px);
}
.fe-modal-stage { display: grid; gap: 10px; justify-items: center; min-width: 0; }
.fe-modal-label {
  color: rgba(255,255,255,.65) !important;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  font-family: 'JetBrains Mono', monospace;
}
.fe-modal-tools { display: flex; gap: 6px; align-items: center; }
.fe-modal-tool {
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 6px;
  background: rgba(255,255,255,.08);
  color: #fff !important;
  cursor: pointer;
  padding: 5px 12px;
  font-weight: 700;
  font-size: 13px;
  transition: background .15s;
  font-family: 'JetBrains Mono', monospace;
}
.fe-modal-tool:hover { background: rgba(58,158,255,.3); border-color: var(--fe-accent); }
.fe-modal-scroll {
  max-width: 100%;
  max-height: 82vh;
  overflow: auto;
  -webkit-overflow-scrolling: touch;
  touch-action: pan-x pan-y;
}
.fe-modal-img {
  max-width: 100%;
  width: auto;
  height: auto;
  border-radius: var(--fe-r);
  background: #fff;
  transition: transform .12s ease-out;
  will-change: transform;
  display: block;
}
.fe-modal-nav,
.fe-modal-close {
  border: 1px solid rgba(255,255,255,.15);
  border-radius: 50%;
  background: rgba(255,255,255,.08);
  color: #fff !important;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .15s;
}
.fe-modal-nav:hover, .fe-modal-close:hover { background: rgba(58,158,255,.3); border-color: var(--fe-accent); }
.fe-modal-nav { width: 44px; height: 44px; font-size: 24px; }
.fe-modal-nav:disabled { opacity: .25; cursor: not-allowed; }
.fe-modal-close { position: absolute; top: 14px; right: 14px; width: 36px; height: 36px; font-size: 22px; }

/* ── RESPONSIVE ───────────────────────────────────────────────── */
@media (max-width: 1100px) {
  .fe-an-summary { grid-template-columns: repeat(2, 1fr); }
  .fe-an-cols { grid-template-columns: 1fr; }
  .fe-an-row { grid-template-columns: 1fr; }
  .fe-sparkline { justify-content: flex-start; }
}
@media (max-width: 960px) {
  .fe-main { grid-template-columns: 1fr; min-height: 0; }
  .fe-question-pane, .fe-reference-pane { min-height: 0; }
  .fe-question-pane { border-right: none; border-bottom: 1px solid var(--fe-border); }
  .fe-handbook-frame { height: 360px; }
  .fe-carousel { padding-left: 36px; padding-right: 36px; }
  .fe-modal { grid-template-columns: 42px minmax(0,1fr) 42px; padding: 10px; }
  .fe-modal-nav { width: 36px; height: 36px; font-size: 20px; }
  .fe-modal-close { top: 10px; right: 10px; width: 32px; height: 32px; font-size: 20px; }
}
@media (max-width: 640px) {
  .fe-header { gap: 10px; padding: 11px 14px; }
  .fe-brand-topic { display: none; }
  .fe-toolbar { flex-direction: column; align-items: stretch; }
  .fe-toolbar-left, .fe-toolbar-right { width: 100%; }
  .fe-select { min-width: 0; flex: 1; }
  .fe-toolbar-right { justify-content: stretch; }
  .fe-toolbar-right .fe-btn { flex: 1; }
  .fe-pane-body { padding: 14px; }
  .fe-session-score { font-size: 46px; }
}

/* ══════════════════════════════════════════════════════════════════
   QUESTION BANK
   ══════════════════════════════════════════════════════════════════ */

.fe-btn-bank { border-color: rgba(20,184,166,0.45) !important; color: #14b8a6 !important; }
.fe-btn-bank.is-active {
  background: rgba(20,184,166,0.15) !important;
  color: #2dd4bf !important;
  border-color: rgba(20,184,166,0.55) !important;
  box-shadow: 0 0 10px rgba(20,184,166,0.2) !important;
}

.fe-bank-pane {
  display: flex;
  flex-direction: column;
  flex: 1;
  overflow: hidden;
}
.fe-bank-toolbar {
  display: flex;
  gap: 10px;
  padding: 12px 18px 10px;
  background: var(--fe-surface);
  border-bottom: 1px solid var(--fe-border);
  flex-shrink: 0;
}
.fe-bank-search { flex: 1; }
.fe-bank-topic-select { flex: 0 0 200px; }

.fe-bank-body {
  overflow-y: auto;
  flex: 1;
  padding: 16px 18px 32px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.fe-bank-group { display: flex; flex-direction: column; gap: 5px; }
.fe-bank-group-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 5px 0 4px;
  border-bottom: 1px solid rgba(58,158,255,0.15);
  margin-bottom: 2px;
}
.fe-bank-group-name {
  font-weight: 700;
  font-size: .8rem;
  color: var(--fe-accent) !important;
  letter-spacing: .04em;
  font-family: 'JetBrains Mono', monospace;
}
.fe-bank-group-count {
  font-size: .7rem;
  color: var(--fe-muted) !important;
  background: var(--fe-accent-bg);
  border: 1px solid rgba(58,158,255,0.2);
  padding: 1px 7px;
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
}

.fe-bank-item {
  background: var(--fe-surface-2);
  border: 1px solid var(--fe-border);
  border-radius: var(--fe-r);
  overflow: hidden;
  transition: border-color .12s, box-shadow .12s;
}
.fe-bank-item:hover {
  border-color: var(--fe-border-2);
  box-shadow: 0 2px 12px rgba(0,0,0,0.3);
}
.fe-bank-item-head {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: start;
  gap: 10px;
  padding: 9px 12px;
  cursor: default;
}
.fe-bank-item-meta { min-width: 0; }
.fe-bank-item-badges {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  margin-bottom: 4px;
}
.fe-bank-item-stmt {
  font-size: .8rem;
  color: var(--fe-ink-2) !important;
  line-height: 1.45;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  overflow: hidden;
}
.fe-bank-item.is-expanded .fe-bank-item-stmt {
  display: block;
  overflow: visible;
  -webkit-line-clamp: unset;
}

.fe-bank-item-answer {
  display: flex;
  align-items: flex-start;
  padding-top: 2px;
  flex-shrink: 0;
}
.fe-bank-ans {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  background: var(--fe-ok-bg);
  border: 1px solid var(--fe-ok-border);
  color: var(--fe-ok) !important;
  font-weight: 700;
  font-size: .75rem;
  padding: 2px 8px;
  border-radius: 4px;
  white-space: nowrap;
  max-width: 140px;
  overflow: hidden;
  text-overflow: ellipsis;
  font-family: 'JetBrains Mono', monospace;
}
.fe-bank-ans small { font-weight: 400; opacity: .75; color: var(--fe-ok) !important; }

.fe-bank-toggle {
  background: none;
  border: 1px solid var(--fe-border);
  border-radius: 4px;
  width: 26px;
  height: 26px;
  font-size: 10px;
  color: var(--fe-muted) !important;
  cursor: pointer;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .12s;
  margin-top: 1px;
}
.fe-bank-toggle:hover {
  background: var(--fe-accent-bg);
  color: var(--fe-accent) !important;
  border-color: rgba(58,158,255,0.35);
}

.fe-bank-detail {
  padding: 0 12px 12px;
  border-top: 1px solid var(--fe-border);
  background: var(--fe-surface-3);
}
.fe-bank-detail .fe-carousel { margin-top: 10px; }
.fe-bank-meta-row {
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: .72rem;
  padding: 6px 0 0;
  border-top: 1px solid var(--fe-border);
  margin-top: 8px;
}
.fe-bank-meta-row .fe-ref-key { color: var(--fe-muted) !important; font-weight: 600; min-width: 65px; flex-shrink: 0; }
.fe-bank-meta-row .fe-ref-val { color: var(--fe-ink-2) !important; }

@media (max-width: 640px) {
  .fe-bank-toolbar { flex-direction: column; padding: 10px 12px 8px; }
  .fe-bank-topic-select { flex: 1; }
  .fe-bank-body { padding: 10px 12px 24px; gap: 12px; }
  .fe-bank-item-head { grid-template-columns: 1fr auto; gap: 7px; }
  .fe-bank-item-answer { grid-column: 2; grid-row: 1; }
  .fe-bank-toggle { grid-column: 2; grid-row: 2; }
}

/* ══════════════════════════════════════════════════════════════════
   MODE SELECTOR
   ══════════════════════════════════════════════════════════════════ */

.fe-mode-selector-shell {
  min-height: 520px;
  background: var(--fe-bg);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(58,158,255,0.12) 0%, transparent 60%),
    linear-gradient(rgba(58,158,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(58,158,255,0.03) 1px, transparent 1px);
  background-size: auto, 48px 48px, 48px 48px;
}

.fe-mode-selector {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 36px 24px 52px;
}

.fe-mode-intro {
  font-size: 13px;
  color: var(--fe-muted) !important;
  margin-bottom: 32px;
  text-align: center;
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 0.04em;
}

.fe-mode-cards {
  display: flex;
  gap: 20px;
  width: 100%;
  max-width: 800px;
  flex-wrap: wrap;
  justify-content: center;
}

.fe-mode-card {
  flex: 1;
  min-width: 280px;
  max-width: 370px;
  background: var(--fe-surface);
  border: 1px solid var(--fe-border-2);
  border-radius: 12px;
  padding: 28px 24px 24px;
  text-align: left;
  cursor: pointer;
  transition: border-color .2s, box-shadow .2s, transform .15s;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.fe-mode-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(58,158,255,0.04) 0%, transparent 60%);
  opacity: 0;
  transition: opacity .2s;
}

.fe-mode-card:hover {
  border-color: rgba(58,158,255,0.55);
  box-shadow: 0 0 0 1px rgba(58,158,255,0.15), 0 12px 40px rgba(0,0,0,0.6), 0 0 40px rgba(58,158,255,0.08);
  transform: translateY(-3px);
}
.fe-mode-card:hover::before { opacity: 1; }

.fe-mode-card--exam {
  border-color: rgba(124,58,237,0.35);
  background: linear-gradient(160deg, rgba(124,58,237,0.06) 0%, var(--fe-surface) 60%);
}
.fe-mode-card--exam::before {
  background: linear-gradient(135deg, rgba(124,58,237,0.06) 0%, transparent 60%);
}
.fe-mode-card--exam:hover {
  border-color: rgba(124,58,237,0.6);
  box-shadow: 0 0 0 1px rgba(124,58,237,0.15), 0 12px 40px rgba(0,0,0,0.6), 0 0 40px rgba(124,58,237,0.10);
}

.fe-mode-card-badge {
  position: absolute;
  top: 14px;
  right: 16px;
  background: rgba(124,58,237,0.20);
  color: #a78bfa !important;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: .1em;
  padding: 3px 8px;
  border-radius: 4px;
  text-transform: uppercase;
  border: 1px solid rgba(124,58,237,0.3);
  font-family: 'JetBrains Mono', monospace;
}

.fe-mode-card-icon {
  font-size: 34px;
  line-height: 1;
  margin-bottom: 2px;
}

.fe-mode-card-title {
  font-size: 19px;
  font-weight: 700;
  color: var(--fe-ink) !important;
  letter-spacing: -0.01em;
}

.fe-mode-card-desc {
  font-size: 13px;
  color: var(--fe-ink-2) !important;
  line-height: 1.6;
}

.fe-mode-card-features {
  list-style: none;
  padding: 0;
  margin: 4px 0 8px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.fe-mode-card-features li {
  font-size: 12px;
  color: var(--fe-muted) !important;
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 0.01em;
}

.fe-mode-card-cta {
  margin-top: auto;
  font-size: 13px;
  font-weight: 700;
  color: var(--fe-accent) !important;
  letter-spacing: 0.02em;
}
.fe-mode-card--exam .fe-mode-card-cta { color: #a78bfa !important; }

.fe-btn-back-mode { opacity: .7; }
.fe-btn-back-mode:hover { opacity: 1; }

@media (max-width: 560px) {
  .fe-mode-cards { flex-direction: column; align-items: center; }
  .fe-mode-card { max-width: 100%; }
}