/* ============================================================
   kchecks.css — Knowledge-check widget + Final Test overlay
   Layered on top of css/style.css (uses --primary, --accent, etc.)
   ============================================================ */

/* ---------- Block container ---------- */
.kcheck-block {
  margin: 40px 0 8px;
  padding: 28px 28px 24px;
  background: linear-gradient(180deg, #f8fbfd 0%, #ffffff 100%);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 14px;
  position: relative;
  box-shadow: 0 1px 3px rgba(13,46,78,0.04);
  animation: kcFadeIn .35s ease both;
}
.kcheck-block.kc-flash {
  animation: kcFlash 1.1s ease;
}
@keyframes kcFadeIn { from { opacity:0; transform:translateY(8px);} to { opacity:1; transform:none;} }
@keyframes kcFlash {
  0%,100% { box-shadow: 0 1px 3px rgba(13,46,78,0.04); }
  30%     { box-shadow: 0 0 0 6px rgba(0,191,165,0.35), 0 8px 24px rgba(0,191,165,0.25); }
}

.kcheck-header {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  margin-bottom: 18px; padding-bottom: 14px;
  border-bottom: 1px dashed var(--border);
}
.kcheck-header .kc-icon {
  width: 36px; height: 36px; border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; flex-shrink: 0;
}
.kcheck-header h3 { color: var(--primary); font-size: 1.05rem; margin: 0; line-height: 1.2; }
.kcheck-header .kc-sub { color: var(--text-muted); font-size: 0.82rem; }

.kc-progress-pill {
  margin-left: auto; background: #fff; border: 1px solid var(--border);
  border-radius: 50px; padding: 4px 12px; font-size: 0.78rem; font-weight: 700;
  color: var(--text-muted); display: inline-flex; align-items: center; gap: 6px;
}
.kc-progress-pill .kc-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--text-muted); }
.kc-progress-pill.kc-passed { background: #e8f8f5; border-color: #a7f3d0; color: #065f46; }
.kc-progress-pill.kc-passed .kc-dot { background: var(--accent); box-shadow: 0 0 0 4px rgba(0,191,165,0.18); }

/* ---------- Question ---------- */
.kc-question {
  background: #fff; border: 1px solid var(--border); border-radius: 12px;
  padding: 18px 20px; margin-bottom: 16px; transition: border-color .2s, box-shadow .2s;
  animation: kcSlideIn .4s ease both;
}
@keyframes kcSlideIn { from { opacity:0; transform:translateX(-6px);} to { opacity:1; transform:none;} }

.kc-question.kc-correct   { border-color: #a7f3d0; background: #f0fdf9; }
.kc-question.kc-incorrect { border-color: #fecaca; background: #fff5f5; }
.kc-question:focus-within { box-shadow: 0 0 0 3px rgba(0,191,165,0.18); border-color: var(--accent); }

.kc-q-head {
  display: flex; gap: 12px; align-items: flex-start;
  margin-bottom: 14px;
}
.kc-q-num {
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--primary); color: #fff; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.75rem; font-weight: 700;
}
.kc-q-text { font-size: 0.95rem; line-height: 1.55; color: var(--text); flex: 1; }
.kc-q-text strong { color: var(--primary); }
.kc-q-text .kc-q-scenario {
  display: block; margin-bottom: 8px; padding: 10px 12px;
  background: #f1f5f9; border-left: 3px solid var(--secondary);
  border-radius: 6px; font-size: 0.88rem; color: #334155;
}
.kc-q-type-tag {
  display: inline-block; font-size: 0.66rem; font-weight: 700;
  letter-spacing: 0.06em; text-transform: uppercase;
  background: #eef2f7; color: var(--text-muted);
  padding: 2px 8px; border-radius: 50px; margin-left: 6px;
}

/* ---------- Answer area shared ---------- */
.kc-answers { display: flex; flex-direction: column; gap: 8px; }

/* ---------- mc / mcmulti / scenario options ---------- */
.kc-opt {
  display: flex; gap: 12px; align-items: flex-start;
  padding: 10px 14px; border: 1.5px solid var(--border);
  border-radius: 10px; background: #fff; cursor: pointer;
  transition: all .15s ease; user-select: none;
  font-size: 0.9rem; color: var(--text); line-height: 1.5;
}
.kc-opt:hover { border-color: var(--accent); background: #f0fdf9; }
.kc-opt input { margin-top: 3px; accent-color: var(--accent); flex-shrink: 0; cursor: pointer; }
.kc-opt.kc-picked { border-color: var(--accent); background: #e8f8f5; }
.kc-opt.kc-opt-correct {
  border-color: #16a34a; background: #f0fdf9; color: #065f46;
}
.kc-opt.kc-opt-correct::after {
  content: "✓"; margin-left: auto; color: #16a34a; font-weight: 800;
  animation: kcCheckPop .4s ease both;
}
.kc-opt.kc-opt-wrong {
  border-color: #dc2626; background: #fff5f5; color: #7f1d1d;
}
.kc-opt.kc-opt-wrong::after { content: "✗"; margin-left: auto; color: #dc2626; font-weight: 800; }
@keyframes kcCheckPop { 0% { transform: scale(0); opacity: 0; } 70% { transform: scale(1.4); } 100% { transform: scale(1); opacity: 1; } }

/* ---------- tf ---------- */
.kc-tf { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.kc-tf-btn {
  padding: 14px 18px; border-radius: 12px; border: 2px solid var(--border);
  background: #fff; font-size: 0.95rem; font-weight: 700;
  cursor: pointer; transition: all .15s ease; color: var(--text);
}
.kc-tf-btn:hover { border-color: var(--accent); }
.kc-tf-btn.kc-picked.kc-true  { background: #e8f8f5; border-color: var(--accent); color: #065f46; }
.kc-tf-btn.kc-picked.kc-false { background: #fff5f5; border-color: #dc2626; color: #7f1d1d; }
.kc-tf-btn.kc-correct  { background: #dcfce7; border-color: #16a34a; color: #065f46; }
.kc-tf-btn.kc-wrong    { background: #fee2e2; border-color: #dc2626; color: #7f1d1d; }

/* ---------- fill ---------- */
.kc-fill-input {
  width: 100%; padding: 12px 14px; border-radius: 10px;
  border: 1.5px solid var(--border); font-size: 0.95rem;
  font-family: inherit; transition: border-color .15s;
  background: #fff;
}
.kc-fill-input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(0,191,165,0.18); }
.kc-fill-input.kc-correct { border-color: #16a34a; background: #f0fdf9; }
.kc-fill-input.kc-wrong   { border-color: #dc2626; background: #fff5f5; }

/* ---------- match ---------- */
.kc-match { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 22px; }
.kc-match-col-label { font-size: 0.75rem; font-weight: 700;
  letter-spacing: 0.08em; color: var(--text-muted); text-transform: uppercase;
  grid-column: span 1; margin-bottom: 4px;
}
.kc-match-item, .kc-match-slot, .kc-match-bank-item {
  background: #fff; border: 1.5px solid var(--border); border-radius: 10px;
  padding: 12px 14px; font-size: 0.9rem; color: var(--text);
  min-height: 46px; display: flex; align-items: center; gap: 8px;
  transition: all .15s;
}
.kc-match-item { background: #f1f5f9; font-weight: 600; cursor: default; }
.kc-match-slot {
  background: #fff; border-style: dashed; cursor: pointer; color: var(--text-muted);
  font-style: italic;
}
.kc-match-slot.kc-filled { background: #e8f8f5; border-style: solid;
  border-color: var(--accent); color: var(--text); font-style: normal; font-weight: 600; }
.kc-match-slot.kc-active { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(0,191,165,0.18); }
.kc-match-slot.kc-correct { background: #dcfce7; border-color: #16a34a; color: #065f46; }
.kc-match-slot.kc-wrong   { background: #fee2e2; border-color: #dc2626; color: #7f1d1d; }
.kc-match-slot.kc-dragover{ background: #e0f7f3; border-style: solid; }

.kc-match-bank { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px;
  padding: 10px; background: #f8fafc; border: 1px dashed var(--border); border-radius: 10px; }
.kc-match-bank-item {
  cursor: grab; background: #fff; padding: 8px 12px;
  font-size: 0.85rem; min-height: 0;
}
.kc-match-bank-item:active { cursor: grabbing; }
.kc-match-bank-item.kc-tap-active { background: var(--accent); color: #fff; border-color: var(--accent); }
.kc-match-bank-item.kc-used { opacity: 0.35; pointer-events: none; }
.kc-match-bank-item.kc-dragging { opacity: 0.4; }
.kc-match-clear {
  background: transparent; border: none; color: #dc2626; font-size: 1rem;
  cursor: pointer; padding: 0; margin-left: auto;
}

/* ---------- sequence ---------- */
.kc-seq { display: flex; flex-direction: column; gap: 8px; }
.kc-seq-item {
  display: flex; align-items: center; gap: 12px;
  background: #fff; border: 1.5px solid var(--border);
  border-radius: 10px; padding: 12px 14px; font-size: 0.9rem;
  cursor: grab; transition: all .15s;
}
.kc-seq-item:active { cursor: grabbing; }
.kc-seq-item.kc-dragging { opacity: 0.4; }
.kc-seq-item.kc-dragover-top    { border-top-color: var(--accent); border-top-width: 3px; }
.kc-seq-item.kc-dragover-bottom { border-bottom-color: var(--accent); border-bottom-width: 3px; }
.kc-seq-item .kc-seq-pos {
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--primary); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 0.78rem; flex-shrink: 0;
}
.kc-seq-item.kc-correct { background: #f0fdf9; border-color: #16a34a; }
.kc-seq-item.kc-wrong   { background: #fff5f5; border-color: #dc2626; }
.kc-seq-handle { color: var(--text-muted); margin-left: auto; cursor: grab; user-select: none; }
.kc-seq-btns { display: flex; gap: 2px; margin-left: 6px; }
.kc-seq-btns button {
  background: var(--light-bg); border: 1px solid var(--border);
  border-radius: 6px; padding: 4px 8px; font-size: 0.75rem;
  cursor: pointer; color: var(--text-muted);
}
.kc-seq-btns button:hover { color: var(--accent); border-color: var(--accent); }

/* ---------- Feedback / Explain ---------- */
.kc-feedback {
  margin-top: 12px; padding: 10px 14px; border-radius: 8px;
  font-size: 0.85rem; line-height: 1.55; display: none;
  animation: kcSlideIn .25s ease both;
}
.kc-feedback.kc-show { display: block; }
.kc-feedback.kc-good { background: #dcfce7; border-left: 3px solid #16a34a; color: #064e3b; }
.kc-feedback.kc-bad  { background: #fee2e2; border-left: 3px solid #dc2626; color: #7f1d1d; }
.kc-feedback strong { font-weight: 700; }
.kc-feedback .kc-explain { display: block; margin-top: 6px; font-style: italic; opacity: 0.9; }

/* ---------- Submit / status ---------- */
.kc-actions {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  margin-top: 18px; padding-top: 16px; border-top: 1px dashed var(--border);
}
.kc-check-btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff; border: none; border-radius: 10px;
  padding: 12px 22px; font-size: 0.9rem; font-weight: 700;
  cursor: pointer; transition: transform .1s, box-shadow .15s;
}
.kc-check-btn:hover { box-shadow: 0 6px 18px rgba(13,46,78,0.18); transform: translateY(-1px); }
.kc-check-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; box-shadow: none; }
.kc-reset-btn {
  background: transparent; border: none; color: var(--text-muted);
  cursor: pointer; font-size: 0.82rem; text-decoration: underline;
}
.kc-status { font-size: 0.85rem; color: var(--text-muted); margin-left: auto; }
.kc-status.kc-good { color: #15803d; font-weight: 700; }
.kc-status.kc-bad  { color: #b91c1c; font-weight: 700; }

/* ---------- Passed state ---------- */
.kcheck-block.kc-passed { border-left-color: #16a34a; background: linear-gradient(180deg, #f0fdf9 0%, #ffffff 100%); }
.kcheck-block.kc-passed .kcheck-header .kc-icon { background: linear-gradient(135deg, #15803d, #16a34a); }
.kcheck-passed-banner {
  background: linear-gradient(90deg, #dcfce7, #f0fdf9);
  border: 1px solid #86efac; border-radius: 10px;
  padding: 12px 16px; margin-bottom: 14px; font-size: 0.9rem;
  color: #065f46; display: flex; align-items: center; gap: 10px;
  animation: kcSlideIn .3s ease both;
}
.kcheck-passed-banner .kc-celebrate {
  font-size: 1.3rem; animation: kcBounce 0.9s ease 0.1s 2;
  display: inline-block;
}
@keyframes kcBounce {
  0%,100%{ transform: translateY(0); }
  30% { transform: translateY(-8px) rotate(-10deg); }
  60% { transform: translateY(0) rotate(10deg); }
}

/* ---------- Confetti (CSS-only emoji pop) ---------- */
.kc-confetti { position: absolute; pointer-events: none; inset: 0; overflow: hidden; }
.kc-confetti span {
  position: absolute; top: -10%; font-size: 1.2rem;
  animation: kcConfettiFall 1.8s ease-in forwards;
}
@keyframes kcConfettiFall {
  0% { transform: translateY(-10%) rotate(0); opacity: 1; }
  100% { transform: translateY(140%) rotate(540deg); opacity: 0; }
}

/* ---------- Locked nav warning ---------- */
.kc-nav-warning {
  position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%);
  background: #b91c1c; color: #fff;
  padding: 12px 22px; border-radius: 50px; font-size: 0.88rem;
  font-weight: 600; z-index: 9998;
  box-shadow: 0 10px 30px rgba(0,0,0,0.25);
  animation: kcSlideUp .25s ease both;
}
@keyframes kcSlideUp { from { transform: translate(-50%, 20px); opacity: 0;} to { transform: translate(-50%,0); opacity: 1;} }

/* ============================================================
   FINAL TEST OVERLAY
   ============================================================ */
.final-test-overlay {
  position: fixed; inset: 0; z-index: 10000;
  background: rgba(13,46,78,0.6);
  display: none; align-items: stretch; justify-content: center;
  animation: kcFadeIn .25s ease both; padding: 0;
  overflow: hidden;
}
.final-test-overlay.kc-open { display: flex; }

.final-test-modal {
  background: var(--white); width: 100%; max-width: 980px;
  margin: 0 auto; display: flex; flex-direction: column;
  height: 100vh; max-height: 100vh; overflow: hidden;
  box-shadow: 0 30px 80px rgba(0,0,0,0.4);
}

.final-test-head {
  flex-shrink: 0; background: var(--primary); color: #fff;
  padding: 18px 28px; display: flex; align-items: center; gap: 16px;
}
.final-test-head h2 { color: #fff; font-size: 1.15rem; margin: 0; flex: 1; line-height: 1.3; }
.final-test-head .kc-sub { font-size: 0.78rem; color: rgba(255,255,255,0.7); display: block; margin-top: 2px; }
.final-test-close {
  background: rgba(255,255,255,0.12); border: none; color: #fff;
  width: 36px; height: 36px; border-radius: 50%; cursor: pointer;
  font-size: 1.15rem; transition: background .15s;
}
.final-test-close:hover { background: rgba(255,255,255,0.25); }

.final-test-body {
  flex: 1; overflow-y: auto; padding: 28px 32px 120px;
  background: #f8fafc;
}
.final-test-body .kc-question { background: #fff; }
.final-test-intro {
  background: linear-gradient(135deg, #e8f8f5, #fff);
  border: 1px solid #a7f3d0; border-radius: 12px;
  padding: 18px 20px; margin-bottom: 24px; color: #064e3b;
  font-size: 0.92rem; line-height: 1.6;
}
.final-test-intro strong { color: #065f46; display: block; margin-bottom: 4px; font-size: 1rem; }

.final-test-bar {
  flex-shrink: 0; position: sticky; bottom: 0;
  background: #fff; border-top: 1px solid var(--border);
  padding: 14px 28px; display: flex; align-items: center; gap: 16px;
  box-shadow: 0 -6px 24px rgba(0,0,0,0.08);
}
.final-test-bar .kc-tally {
  font-size: 0.9rem; color: var(--text-muted); font-weight: 600;
}
.final-test-bar .kc-tally strong { color: var(--primary); }
.final-test-bar .kc-submit-btn {
  margin-left: auto;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  color: #fff; border: none; border-radius: 10px;
  padding: 14px 26px; font-size: 0.95rem; font-weight: 700;
  cursor: pointer; transition: all .15s;
}
.final-test-bar .kc-submit-btn:hover { box-shadow: 0 8px 22px rgba(0,191,165,0.4); transform: translateY(-1px); }
.final-test-bar .kc-submit-btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ---------- Result screens ---------- */
.final-test-result {
  text-align: center; padding: 50px 30px; max-width: 640px; margin: 0 auto;
  animation: kcFadeIn .35s ease both;
}
.final-test-result .kc-result-icon {
  font-size: 4.5rem; line-height: 1; margin-bottom: 20px;
  animation: kcBounce 1s ease 1;
}
.final-test-result h3 { font-size: 1.8rem; color: var(--primary); margin-bottom: 12px; }
.final-test-result.kc-fail h3 { color: #b91c1c; }
.final-test-result.kc-pass h3 { color: #15803d; }
.final-test-result .kc-score {
  display: inline-block; padding: 18px 36px; margin: 16px 0;
  border-radius: 16px; font-size: 2.2rem; font-weight: 800;
  background: #fff; box-shadow: 0 4px 18px rgba(0,0,0,0.08);
}
.final-test-result.kc-pass .kc-score { color: #15803d; border: 2px solid #86efac; }
.final-test-result.kc-fail .kc-score { color: #b91c1c; border: 2px solid #fecaca; }
.final-test-result p { color: var(--text); font-size: 0.95rem; line-height: 1.7; margin: 14px 0; }
.final-test-result .kc-result-actions { display: flex; gap: 12px; justify-content: center; margin-top: 24px; flex-wrap: wrap; }
.final-test-result button {
  padding: 14px 28px; border-radius: 10px; font-size: 0.92rem;
  font-weight: 700; cursor: pointer; border: 2px solid var(--border);
  background: #fff; color: var(--text);
}
.final-test-result button.kc-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  border-color: var(--accent); color: #fff;
}
.final-test-result button:hover { transform: translateY(-1px); }

.final-test-review-list { text-align: left; margin: 24px 0; }
.final-test-review-list .kc-question.kc-incorrect { border-left: 4px solid #dc2626; }

/* ---------- Take Final Test button on section 12 ---------- */
.btn-module-nav.kc-final-cta {
  background: linear-gradient(135deg, #f59e0b, #ef4444);
  border-color: #f59e0b; color: #fff;
  font-weight: 700; box-shadow: 0 6px 18px rgba(239,68,68,0.3);
  animation: kcPulse 2.4s ease-in-out infinite;
}
.btn-module-nav.kc-final-cta:hover { background: linear-gradient(135deg, #ef4444, #dc2626); color: #fff; }
@keyframes kcPulse { 0%,100%{ box-shadow: 0 6px 18px rgba(239,68,68,0.3);} 50%{ box-shadow: 0 10px 26px rgba(239,68,68,0.55);} }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 720px) {
  .kcheck-block { padding: 20px 16px; margin: 28px 0 4px; }
  .kc-match { grid-template-columns: 1fr; }
  .kc-tf { grid-template-columns: 1fr; }
  .final-test-head { padding: 14px 18px; }
  .final-test-body { padding: 20px 18px 130px; }
  .final-test-bar { padding: 12px 18px; flex-wrap: wrap; }
  .final-test-bar .kc-submit-btn { width: 100%; margin-left: 0; }
  .final-test-result .kc-score { font-size: 1.6rem; padding: 14px 24px; }
  /* Bigger touch targets on small screens for mc/scenario/mcmulti options + tf buttons */
  .kc-opt { padding: 14px 16px; font-size: 0.95rem; }
  .kc-tf-btn { padding: 18px; font-size: 1rem; }
  .kc-match-slot, .kc-match-bank-item { min-height: 48px; padding: 12px 14px; font-size: 0.95rem; }
  .kc-seq-item { padding: 14px 16px; }
}

/* Disable iOS double-tap zoom on interactive elements */
.kc-opt, .kc-tf-btn, .kc-match-slot, .kc-match-bank-item, .kc-seq-item,
.kc-check-btn, .kc-reset-btn, .kc-submit-btn, .kc-up, .kc-down,
.btn-module-nav.kc-final-cta { touch-action: manipulation; }

/* High-contrast / reduced motion */
@media (prefers-reduced-motion: reduce) {
  .kcheck-block, .kc-question, .kc-feedback, .kcheck-passed-banner,
  .kc-confetti span, .kc-nav-warning, .btn-module-nav.kc-final-cta,
  .final-test-overlay, .final-test-result, .final-test-result .kc-result-icon
  { animation: none !important; }
}

/* Focus visibility (keyboard a11y) */
.kc-opt:focus-visible, .kc-tf-btn:focus-visible,
.kc-match-slot:focus-visible, .kc-match-bank-item:focus-visible,
.kc-seq-item:focus-visible, .kc-check-btn:focus-visible,
.kc-submit-btn:focus-visible, .final-test-close:focus-visible {
  outline: 3px solid var(--accent-light); outline-offset: 2px;
}