/* ══════════════════════════════════════════════════════════
   Acronym Quiz — site-integrated theme
   Uses site vars (--bg, --panel, --muted, --accent, --glass)
   Fonts: Inter, JetBrains Mono (no extra loads)
   ══════════════════════════════════════════════════════════ */

/* Allow scrolling on quiz page */
html:has(#quiz-root),
html:has(#quiz-root) body {
  overflow-y: scroll;
  height: auto;
}

/* Reduce glassy overlay so background image shows through more */
html:has(#quiz-root) .bg-overlay-glass {
  background: rgba(20, 24, 32, 0.18);
  backdrop-filter: blur(4px) saturate(1.05);
}

/* Darken quiz container for readability */
html:has(#quiz-root) .glass-content {
  background: rgba(6, 10, 18, 0.95);
  backdrop-filter: blur(20px) saturate(1.2);
}

/* ── Variables (scoped to quiz root) ───────────────────── */
#quiz-root {
  --qz-surface: rgba(10, 12, 16, 0.5);
  --qz-border: rgba(255,255,255,0.07);
  --qz-border-hover: rgba(255,255,255,0.15);
  --qz-border-strong: rgba(255,255,255,0.18);
  --qz-green: #7fe77f;
  --qz-green-bg: rgba(105, 216, 79, 0.1);
  --qz-green-border: rgba(105, 216, 79, 0.25);
  --qz-red: #ff6b6b;
  --qz-red-bg: rgba(255, 107, 107, 0.1);
  --qz-red-border: rgba(255, 107, 107, 0.22);
  --qz-yellow: #f7d070;
  --qz-yellow-bg: rgba(247, 208, 112, 0.1);
  --qz-yellow-border: rgba(247, 208, 112, 0.22);
}

/* Coals-only mode */
html:has(#quiz-root) body.coals-mode .bg-overlay-glass {
  background: rgba(20, 24, 32, 0) !important;
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
  transition: background 0.85s ease;
}

body.coals-mode .bg-video {
  filter: none;
}

#quiz-root.coal-vanishing {
  pointer-events: none;
  animation: coalVanish 0.9s cubic-bezier(0.22, 0.61, 0.36, 1) forwards;
}

#quiz-root.coal-hidden {
  display: none;
}

#quiz-root.coal-returning {
  animation: coalReturn 0.5s cubic-bezier(0.2, 0.85, 0.32, 1) forwards;
}

@keyframes coalVanish {
  0% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  100% {
    opacity: 0;
    transform: translateY(18px) scale(0.965);
  }
}

@keyframes coalReturn {
  0% {
    opacity: 0;
    transform: translateY(18px) scale(0.965);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.coal-prompt {
  position: fixed;
  left: 50%;
  top: 58%;
  transform: translate(-50%, -50%);
  width: min(620px, 90vw);
  margin: 0;
  padding: 1rem 1.1rem 1.1rem;
  border-radius: 12px;
  z-index: 25;
  display: none;
  opacity: 0;
  pointer-events: none;
}

.coal-prompt.show {
  display: block;
  opacity: 1;
  pointer-events: auto;
  animation: coalPromptIn 0.28s ease both;
}

@keyframes coalPromptIn {
  from { opacity: 0; transform: translate(-50%, -45%); }
  to { opacity: 1; transform: translate(-50%, -50%); }
}

.coal-prompt-question {
  margin: 0;
  color: #dbe7ee;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.84rem;
  letter-spacing: 0.02em;
  text-align: center;
}

.coal-prompt-actions {
  margin-top: 0.9rem;
  display: flex;
  gap: 0.55rem;
  justify-content: center;
}

/* ── Grill sausage easter-egg ──────────────────────────── */
.grill-sausage {
  position: fixed;
  right: -380px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 30;
  pointer-events: none;
  transition: right 5s cubic-bezier(0.22, 1, 0.36, 1);
}
.grill-sausage.slide-in {
  right: calc(50% - 220px);
}
.grill-sausage img {
  width: 340px;
  height: auto;
  display: block;
  filter: drop-shadow(0 4px 18px rgba(0,0,0,.55));
}

#grill-msg {
  top: 58%;
  z-index: 35;
}
#grill-msg.vanishing {
  animation: coalPromptOut 0.5s ease both;
}
@keyframes coalPromptOut {
  from { opacity: 1; transform: translate(-50%, -50%); }
  to   { opacity: 0; transform: translate(-50%, -42%) scale(0.96); }
}

/* ── Screen transitions ────────────────────────────────── */
.qz-screen { display: none; }
.qz-screen.active { display: block; animation: qzFade 0.25s ease both; }
@keyframes qzFade { from{opacity:0;transform:translateY(6px)} to{opacity:1;transform:translateY(0)} }

#screen-home.active,
#screen-difficulty.active,
#screen-quiz.active,
#screen-results.active { display: flex; }

/* ── Status bar ────────────────────────────────────────── */
#statusbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.45rem 0.8rem;
  background: var(--qz-surface);
  border: 1px solid var(--qz-border);
  border-radius: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0.06em;
  margin-bottom: 1.5rem;
}
.sb-left, .sb-right { display: flex; align-items: center; gap: 0.75rem; }
.sb-dot {
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--qz-green);
  box-shadow: 0 0 4px var(--qz-green);
  animation: sbPulse 2s ease infinite;
}
@keyframes sbPulse { 0%,100%{opacity:1} 50%{opacity:0.35} }

/* ── HOME screen ───────────────────────────────────────── */
#screen-home {
  flex-direction: column;
  align-items: center;
  padding: 1.5rem 0 3rem;
}

.qz-hero { text-align: center; margin-bottom: 2rem; }
.qz-hero-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: clamp(1.4rem, 5vw, 2.4rem);
  font-weight: 700;
  line-height: 1.15;
  color: #dbe7ee;
  letter-spacing: 0.02em;
  margin-bottom: 0.6rem;
}
.qz-hero-title .fire { color: #db3300; }
.qz-hero-sub {
  color: var(--muted);
  font-size: 0.88rem;
  max-width: 480px;
  margin: 0 auto;
  line-height: 1.55;
}

/* Stats row */
.qz-stats-row {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  justify-content: center;
}
.qz-stat-item {
  text-align: center;
  font-family: 'JetBrains Mono', monospace;
}
.qz-stat-num {
  font-size: 1.1rem;
  color: #dbe7ee;
  display: block;
  line-height: 1;
  font-weight: 700;
}
.qz-stat-lbl {
  font-size: 0.62rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: 3px;
  display: block;
}

/* Section label */
.qz-section-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 1rem;
  width: 100%;
  max-width: 920px;
}

/* Category grid */
.cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.65rem;
  width: 100%;
  max-width: 920px;
}
.cat-card {
  background: var(--qz-surface);
  border: 1px solid var(--qz-border);
  border-radius: 8px;
  padding: 1rem 0.9rem 0.8rem;
  cursor: pointer;
  transition: all 0.2s;
  position: relative;
  overflow: hidden;
  text-align: left;
}
.cat-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 2px; height: 100%;
  background: var(--c, var(--muted));
  border-radius: 2px 0 0 2px;
  transition: width 0.2s;
}
.cat-card:hover {
  border-color: var(--qz-border-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.25);
}
.cat-card:hover::before { width: 3px; }
.cat-name {
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 0.9rem;
  color: #dbe7ee;
  line-height: 1.1;
  margin-bottom: 3px;
}
.cat-count {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.62rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.cat-tag {
  position: absolute;
  top: 8px; right: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.55rem;
  color: var(--muted);
  opacity: 0.5;
  letter-spacing: 0.08em;
}

.coal-stare-btn {
  width: 100%;
  max-width: 920px;
  margin-top: 0.95rem;
  border: 1px dashed rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  padding: 0.62rem 0.85rem;
  background: rgba(255, 255, 255, 0.02);
  color: #aebbc5;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.66rem;
  letter-spacing: 0.04em;
  text-align: center;
  cursor: pointer;
  transition: all 0.22s ease;
}

.coal-stare-btn:hover {
  border-color: rgba(255, 0, 0, 0.55);
  background: rgba(255, 0, 0, 0.08);
  color: #ff7a7a;
}

/* ── DIFFICULTY screen ─────────────────────────────────── */
#screen-difficulty {
  flex-direction: column;
  align-items: center;
  padding: 1rem 0 3rem;
}
.qz-back-btn {
  align-self: flex-start;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--muted);
  cursor: pointer;
  letter-spacing: 0.06em;
  padding: 0.3rem 0;
  border: none;
  background: none;
  transition: color 0.2s;
  margin-bottom: 1.5rem;
}
.qz-back-btn:hover { color: #fff; }

.diff-header { text-align: center; margin-bottom: 2rem; }
.diff-cat-name {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  font-size: clamp(1.2rem, 4vw, 2rem);
  color: #dbe7ee;
  letter-spacing: 0.02em;
  line-height: 1.1;
}
.diff-cat-sub {
  font-size: 0.82rem;
  color: var(--muted);
  margin-top: 0.4rem;
}
.diff-grid {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
  width: 100%;
  max-width: 600px;
}
.diff-card {
  flex: 1;
  min-width: 160px;
  background: var(--qz-surface);
  border: 1px solid var(--qz-border);
  border-radius: 8px;
  padding: 1.2rem 1rem;
  cursor: pointer;
  transition: all 0.2s;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.diff-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 24px rgba(0,0,0,0.3);
}
.diff-card.easy:hover   { border-color: var(--qz-green-border); background: var(--qz-green-bg); }
.diff-card.medium:hover { border-color: var(--qz-yellow-border); background: var(--qz-yellow-bg); }
.diff-card.hard:hover   { border-color: var(--qz-red-border); background: var(--qz-red-bg); }
.diff-name {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  font-size: 0.95rem;
  color: #dbe7ee;
  letter-spacing: 0.04em;
  display: block;
  margin-bottom: 3px;
  text-transform: uppercase;
}
.diff-info {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.62rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ── QUIZ screen ───────────────────────────────────────── */
#screen-quiz {
  flex-direction: column;
  align-items: center;
  padding: 0.8rem 0 2rem;
}
.quiz-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 680px;
  margin-bottom: 1rem;
}
.quiz-meta {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0.06em;
}
.quiz-meta strong { color: #dbe7ee; font-weight: 600; }
.quit-btn {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--muted);
  cursor: pointer;
  border: 1px solid var(--qz-border);
  border-radius: 6px;
  background: none;
  padding: 0.3rem 0.7rem;
  transition: all 0.2s;
  letter-spacing: 0.06em;
}
.quit-btn:hover { color: var(--qz-red); border-color: var(--qz-red-border); }

/* Progress */
.progress-wrap { width: 100%; max-width: 680px; margin-bottom: 1.5rem; }
.progress-label {
  display: flex;
  justify-content: space-between;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.62rem;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 6px;
}
.progress-track {
  height: 3px;
  background: var(--qz-border);
  border-radius: 2px;
  position: relative;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  border-radius: 2px;
  background: var(--muted);
  transition: width 0.5s cubic-bezier(0.4,0,0.2,1);
}
.progress-segments { display: flex; gap: 2px; margin-top: 5px; }
.seg {
  flex: 1; height: 2px; border-radius: 1px;
  background: var(--qz-border);
  transition: background 0.3s;
}
.seg.correct { background: var(--qz-green); }
.seg.wrong   { background: var(--qz-red); }
.seg.current { background: var(--muted); animation: segPulse 1s ease infinite alternate; }
@keyframes segPulse { from{opacity:1} to{opacity:0.35} }

/* Question card */
.q-card {
  width: 100%;
  max-width: 680px;
  background: var(--qz-surface);
  border: 1px solid var(--qz-border);
  border-radius: 10px;
  padding: 1.8rem 1.8rem 1.4rem;
  position: relative;
  margin-bottom: 0.8rem;
}
.q-number {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.62rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 0.6rem;
  display: block;
}
.q-acronym {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  font-size: clamp(2rem, 8vw, 4rem);
  color: #dbe7ee;
  letter-spacing: 0.06em;
  line-height: 1;
  margin-bottom: 0.4rem;
  display: block;
}
.q-prompt {
  font-size: 0.78rem;
  color: var(--muted);
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 0.04em;
}

/* Answer buttons */
.answers-grid {
  width: 100%;
  max-width: 680px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}
@media (max-width: 540px) { .answers-grid { grid-template-columns: 1fr; } }

.ans-btn {
  background: var(--qz-surface);
  border: 1px solid var(--qz-border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  cursor: pointer;
  transition: all 0.15s;
  text-align: left;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  position: relative;
  overflow: hidden;
}
.ans-btn:hover:not(:disabled) {
  border-color: var(--qz-border-hover);
  transform: translateX(2px);
}
.ans-letter {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem;
  color: var(--muted);
  min-width: 18px;
  border: 1px solid var(--qz-border);
  border-radius: 4px;
  padding: 1px 5px;
  transition: all 0.15s;
  flex-shrink: 0;
}
.ans-btn:hover:not(:disabled) .ans-letter {
  color: #dbe7ee;
  border-color: var(--qz-border-hover);
}
.ans-text {
  font-family: 'Inter', sans-serif;
  font-size: 0.82rem;
  font-weight: 500;
  color: #c0cdd5;
  flex: 1;
  line-height: 1.3;
}

/* Correct / Wrong states */
.ans-btn.correct {
  background: var(--qz-green-bg);
  border-color: var(--qz-green-border);
  animation: correctFlash 0.35s ease;
}
.ans-btn.correct .ans-letter { color: var(--qz-green); border-color: var(--qz-green-border); }
.ans-btn.correct .ans-text   { color: var(--qz-green); }
@keyframes correctFlash { 0%{background:rgba(105,216,79,0.2)} 100%{background:var(--qz-green-bg)} }

.ans-btn.wrong { background: var(--qz-red-bg); border-color: var(--qz-red-border); }
.ans-btn.wrong .ans-letter { color: var(--qz-red); border-color: var(--qz-red-border); }
.ans-btn.wrong .ans-text   { color: var(--qz-red); opacity: 0.7; }
.ans-btn:disabled { cursor: default; }

/* Feedback bar */
.feedback-bar {
  width: 100%;
  max-width: 680px;
  padding: 0.6rem 1rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  display: none;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid;
  border-radius: 8px;
  margin-top: 0.5rem;
}
.feedback-bar.show { display: flex; animation: qzFade 0.2s ease; }
.feedback-bar.correct { border-color: var(--qz-green-border); color: var(--qz-green); background: var(--qz-green-bg); }
.feedback-bar.wrong   { border-color: var(--qz-red-border); color: var(--qz-red); background: var(--qz-red-bg); }
.feedback-correct-ans { opacity: 0.65; font-size: 0.68rem; }

/* Next button */
.next-btn {
  margin-top: 0.6rem;
  width: 100%;
  max-width: 680px;
  background: none;
  border: 1px solid var(--qz-border);
  border-radius: 8px;
  padding: 0.7rem;
  cursor: pointer;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: all 0.2s;
  display: none;
}
.next-btn.show { display: block; animation: qzFade 0.2s ease; }
.next-btn:hover { color: #fff; border-color: var(--qz-border-hover); background: rgba(255,255,255,0.03); }

/* ── RESULTS screen ────────────────────────────────────── */
#screen-results {
  flex-direction: column;
  align-items: center;
  padding: 2rem 0 3rem;
  text-align: center;
}
.result-grade {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  font-size: clamp(3.5rem, 14vw, 7rem);
  line-height: 1;
  letter-spacing: 0.04em;
  margin-bottom: 0;
}
.grade-S { color: #dbe7ee; }
.grade-A { color: var(--qz-green); }
.grade-B { color: var(--qz-yellow); }
.grade-C { color: #f7d070; }
.grade-D { color: var(--qz-red); }
.grade-F { color: var(--muted); }

.result-verdict {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 600;
  font-size: clamp(0.78rem, 2.5vw, 1rem);
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 0.3rem;
}
.result-score-box {
  margin: 1.5rem 0;
  border: 1px solid var(--qz-border);
  background: var(--qz-surface);
  border-radius: 10px;
  padding: 1.2rem 2.5rem;
}
.result-big-score {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  font-size: 2.5rem;
  color: #dbe7ee;
  line-height: 1;
}
.result-big-score span { color: var(--muted); font-size: 1.2rem; }
.result-sub {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.62rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: 0.5rem;
}

/* Breakdown row */
.result-breakdown { display: flex; gap: 1.5rem; margin-bottom: 1.5rem; flex-wrap: wrap; justify-content: center; }
.rb-item { font-family: 'JetBrains Mono', monospace; font-size: 0.72rem; text-align: center; }
.rb-num  { font-size: 1.2rem; font-weight: 700; display: block; margin-bottom: 2px; }
.rb-lbl  { color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.58rem; }
.rb-item.c .rb-num { color: var(--qz-green); }
.rb-item.w .rb-num { color: var(--qz-red); }
.rb-item.a .rb-num { color: #dbe7ee; }

/* Result buttons — matches projects-filter-btn / projects-sort-btn style */
.result-btns { display: flex; gap: 0.5rem; flex-wrap: wrap; justify-content: center; }
.r-btn {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.45rem 0.9rem;
  cursor: pointer;
  border: 1px solid var(--qz-border);
  border-radius: 6px;
  transition: all 0.2s;
  background: rgba(255,255,255,0.03);
  color: var(--muted);
}
.r-btn:hover {
  color: #fff;
  border-color: var(--qz-border-hover);
}
.r-btn.primary {
  color: #fff;
  background: rgba(255,255,255,0.08);
  border-color: var(--qz-border-strong);
}
.r-btn.primary:hover {
  background: rgba(255,255,255,0.12);
}

/* ── Responsive ────────────────────────────────────────── */
@media (max-width: 767px) {
  #statusbar { font-size: 0.65rem; padding: 0.35rem 0.65rem; }
  .sb-left, .sb-right { gap: 0.5rem; }
  .q-card { padding: 1.2rem 1rem 1rem; }
  .cat-grid { grid-template-columns: repeat(auto-fill, minmax(145px, 1fr)); gap: 0.5rem; }
  .diff-grid { gap: 0.5rem; }
  .diff-card { min-width: 130px; padding: 1rem 0.8rem; }
}
@media (max-width: 420px) {
  .cat-grid { grid-template-columns: 1fr 1fr; }
  .diff-grid { flex-direction: column; align-items: center; }
  .diff-card { width: 100%; max-width: 240px; }
}