/* ═══════════════════════════════════════════════════════════════
   Morse Code Visual Quiz — quiz.css
   Depends on: style.css (site globals, --bg, --accent, etc.)
   Web Vitals: no layout shifts, no blocking resources
   ═══════════════════════════════════════════════════════════════ */

/* ── QUIZ HERO ──────────────────────────────────────────────── */
.quiz-hero {
  padding: 56px 0 40px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-panel);
  text-align: center;
}
.quiz-hero .hero-eyebrow {
  font-family: var(--morse-font);
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 3px;
  margin-bottom: 12px;
}
.quiz-hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  color: var(--text-main);
  line-height: 1.2;
  margin-bottom: 12px;
}
.quiz-hero h1 span { color: var(--accent); }
.quiz-hero .hero-sub {
  color: var(--text-muted);
  font-size: 0.95rem;
  max-width: 580px;
  margin: 0 auto 28px;
  line-height: 1.7;
}

/* ── DIFFICULTY + MODE TABS ─────────────────────────────────── */
.quiz-controls {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  margin-bottom: 8px;
}
.tab-group {
  display: flex;
  gap: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 4px;
}
.tab-group label {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 6px;
  display: block;
  text-align: center;
}
.tab-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  padding: 7px 18px;
  border-radius: 7px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}
.tab-btn:hover { color: var(--text-main); }
.tab-btn.active {
  background: var(--accent);
  color: #000;
  font-weight: 600;
}
.tab-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ── MAIN QUIZ CARD ─────────────────────────────────────────── */
.quiz-section {
  padding: 48px 0 80px;
  background: var(--bg);
}
.quiz-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 36px 32px;
  max-width: 680px;
  margin: 0 auto;
  position: relative;
}

/* ── PROGRESS ───────────────────────────────────────────────── */
.quiz-progress {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}
.progress-bar-wrap {
  flex: 1;
  height: 5px;
  background: var(--border);
  border-radius: 99px;
  overflow: hidden;
}
.progress-bar-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 99px;
  width: 0%;
  transition: width 0.4s ease;
  will-change: width;
}
.progress-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  white-space: nowrap;
  min-width: 52px;
  text-align: right;
}
.streak-badge {
  font-size: 0.75rem;
  color: var(--accent);
  font-family: var(--morse-font);
  white-space: nowrap;
  min-width: 60px;
}

/* ── QUESTION PROMPT ────────────────────────────────────────── */
.question-prompt {
  text-align: center;
  margin-bottom: 28px;
}
.question-prompt .q-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 10px;
}

/* ── PATTERN DISPLAY (dots & dashes) ───────────────────────── */
.pattern-display {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  min-height: 52px;
  margin: 14px 0 10px;
  padding: 16px;
  background: var(--bg-panel);
  border-radius: 12px;
  border: 1px solid var(--border);
}
.morse-dot,
.morse-dash {
  display: inline-block;
  border-radius: 99px;
  background: var(--border);
  transition: background 0.08s, box-shadow 0.08s;
  flex-shrink: 0;
}
.morse-dot  { width: 14px; height: 14px; }
.morse-dash { width: 38px; height: 14px; }

/* Lit state during animation */
.morse-dot.lit,
.morse-dash.lit {
  background: var(--accent);
  box-shadow: 0 0 10px rgba(232,184,75,0.55);
}
/* Revealed (all lit, answer shown) */
.morse-dot.revealed,
.morse-dash.revealed {
  background: var(--accent);
}

/* Letter separator in pattern (space between chars in word mode) */
.pattern-sep {
  width: 10px;
  height: 14px;
  display: inline-block;
  flex-shrink: 0;
}

/* The big letter in encode mode */
.encode-letter {
  font-size: 5rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1;
  letter-spacing: -2px;
  padding: 20px 0 8px;
}

/* Replay button */
.replay-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: 8px;
  padding: 5px 14px;
  font-size: 0.78rem;
  cursor: pointer;
  margin-top: 8px;
  transition: border-color 0.15s, color 0.15s;
}
.replay-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.replay-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

/* Hint button */
.hint-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: 8px;
  padding: 5px 14px;
  font-size: 0.78rem;
  cursor: pointer;
  margin-top: 8px;
  margin-left: 8px;
  transition: border-color 0.15s, color 0.15s;
}
.hint-btn:hover {
  border-color: var(--accent2);
  color: var(--accent2);
}
.hint-btn.used { opacity: 0.4; pointer-events: none; }

/* ── ANSWER BUTTONS ─────────────────────────────────────────── */
.answers-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 24px;
}
.answer-btn {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text-main);
  font-size: 0.95rem;
  padding: 14px 12px;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, transform 0.1s;
  text-align: center;
  line-height: 1.4;
  font-family: inherit;
  min-height: 58px;
}
.answer-btn:hover:not(:disabled) {
  border-color: var(--accent);
  background: rgba(232,184,75,0.06);
}
.answer-btn:active:not(:disabled) { transform: scale(0.98); }
.answer-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.answer-btn:disabled { cursor: not-allowed; }

/* Result states */
.answer-btn.correct {
  border-color: #22c55e;
  background: rgba(34,197,94,0.12);
  color: #4ade80;
}
.answer-btn.wrong {
  border-color: #ef4444;
  background: rgba(239,68,68,0.1);
  color: #f87171;
  animation: shake 0.35s ease;
}
@keyframes shake {
  0%,100% { transform: translateX(0); }
  20%      { transform: translateX(-6px); }
  40%      { transform: translateX(6px); }
  60%      { transform: translateX(-4px); }
  80%      { transform: translateX(4px); }
}

/* Morse pattern inside answer button (encode mode) */
.answer-btn .btn-pattern {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  flex-wrap: wrap;
  pointer-events: none;
}
.answer-btn .btn-dot  { width: 9px;  height: 9px;  border-radius: 50%; background: currentColor; display: inline-block; flex-shrink: 0; }
.answer-btn .btn-dash { width: 24px; height: 9px;  border-radius: 99px; background: currentColor; display: inline-block; flex-shrink: 0; }
.answer-btn .btn-sep  { width: 7px; display: inline-block; flex-shrink: 0; }

/* ── FEEDBACK TOAST (inside card) ───────────────────────────── */
.feedback-line {
  text-align: center;
  font-size: 0.85rem;
  margin-top: 14px;
  min-height: 22px;
  color: var(--text-muted);
  transition: opacity 0.2s;
}
.feedback-line.correct-msg { color: #4ade80; }
.feedback-line.wrong-msg   { color: #f87171; }

/* ── SPEED TIMER ────────────────────────────────────────────── */
.speed-timer {
  display: none;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.speed-timer.visible { display: flex; }
.timer-bar-wrap {
  flex: 1;
  height: 4px;
  background: var(--border);
  border-radius: 99px;
  overflow: hidden;
}
.timer-bar-fill {
  height: 100%;
  background: var(--accent2);
  border-radius: 99px;
  width: 100%;
  transition: width 0.1s linear;
  will-change: width;
}
.timer-bar-fill.urgent { background: #ef4444; }
.timer-seconds {
  font-size: 0.82rem;
  color: var(--text-muted);
  min-width: 32px;
  text-align: right;
  font-family: var(--morse-font);
}

/* ── RESULTS SCREEN ─────────────────────────────────────────── */
.results-screen {
  display: none;
  text-align: center;
}
.results-screen.visible { display: block; }

.results-score {
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin: 16px 0 4px;
}
.results-score-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 28px;
}
.results-stats {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}
.r-stat { text-align: center; }
.r-stat strong {
  display: block;
  font-size: 1.4rem;
  color: var(--text-main);
}
.r-stat span {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* Weak spots table */
.weak-spots-title {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 10px;
  text-align: left;
}
.weak-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  margin-bottom: 24px;
  text-align: left;
}
.weak-table th {
  color: var(--text-muted);
  font-weight: 500;
  padding: 6px 10px;
  border-bottom: 1px solid var(--border);
}
.weak-table td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  color: var(--text-main);
}
.weak-table td:last-child { color: #f87171; }
.weak-table tr:last-child td { border-bottom: none; }
.morse-code-cell {
  font-family: var(--morse-font);
  color: var(--accent);
  letter-spacing: 2px;
}

/* Results action buttons */
.results-actions {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 8px;
}
.btn-quiz-primary {
  background: var(--accent);
  color: #000;
  border: none;
  border-radius: 8px;
  padding: 12px 28px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s;
}
.btn-quiz-primary:hover { opacity: 0.88; }
.btn-quiz-outline {
  background: none;
  color: var(--text-main);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 24px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: border-color 0.15s;
}
.btn-quiz-outline:hover { border-color: var(--accent); color: var(--accent); }

/* Share text result */
.share-result-box {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 0.82rem;
  color: var(--text-muted);
  font-family: var(--morse-font);
  margin-top: 16px;
  letter-spacing: 1px;
  word-break: break-all;
  text-align: left;
}

/* ── START SCREEN ───────────────────────────────────────────── */
.start-screen { text-align: center; }
.start-screen h2 {
  font-size: 1.3rem;
  color: var(--text-main);
  margin-bottom: 8px;
}
.start-screen p {
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.7;
  max-width: 420px;
  margin: 0 auto 24px;
}
.start-info-grid {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 10px;
  margin-bottom: 28px;
}
.start-info-item {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 8px;
}
.start-info-item strong {
  display: block;
  font-size: 1.3rem;
  color: var(--accent);
  margin-bottom: 4px;
}
.start-info-item span {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ── REFERENCE CHART PANEL ──────────────────────────────────── */
.chart-panel-section {
  padding: 64px 0;
  border-top: 1px solid var(--border);
  background: var(--bg-panel);
}
.mini-chart {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(72px, 1fr));
  gap: 8px;
  margin-top: 20px;
}
.mini-char {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 6px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s;
}
.mini-char:hover { border-color: var(--accent); }
.mini-char .mc-letter {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  display: block;
  margin-bottom: 4px;
}
.mini-char .mc-code {
  font-family: var(--morse-font);
  font-size: 0.62rem;
  color: var(--accent);
  letter-spacing: 1.5px;
  display: block;
  line-height: 1.4;
}
.chart-tabs-mini {
  display: flex;
  gap: 4px;
  margin-top: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 3px;
  width: fit-content;
}
.ctab {
  background: none;
  border: none;
  color: var(--text-muted);
  padding: 6px 16px;
  border-radius: 6px;
  font-size: 0.82rem;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.ctab.active { background: var(--accent); color: #000; font-weight: 600; }

/* ── HOW TO PLAY ─────────────────────────────────────────────── */
.howto-section {
  padding: 64px 0;
  border-top: 1px solid var(--border);
  background: var(--bg);
}
.howto-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
  margin-top: 28px;
}
.howto-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px 18px;
}
.howto-card .hw-num {
  font-family: var(--morse-font);
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 2px;
  margin-bottom: 8px;
}
.howto-card h3 {
  font-size: 0.95rem;
  color: var(--text-main);
  margin-bottom: 6px;
}
.howto-card p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ── FAQ REUSE ───────────────────────────────────────────────── */
/* Uses existing .faq-section, .faq-item, .faq-q, .faq-a from style.css */

/* ── INTERNAL LINKS / SEO SECTION ───────────────────────────── */
.related-section {
  padding: 56px 0;
  border-top: 1px solid var(--border);
  background: var(--bg-panel);
}

/* ── UTILITY ─────────────────────────────────────────────────── */
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}
.quiz-state-hidden { display: none !important; }

/* ── RESPONSIVE ─────────────────────────────────────────────── */
@media (max-width: 600px) {
  .quiz-card { padding: 24px 16px; border-radius: 14px; }
  .answers-grid { grid-template-columns: 1fr; }
  .start-info-grid { grid-template-columns: repeat(3,1fr); }
  .encode-letter { font-size: 3.5rem; }
  .results-score { font-size: 2.8rem; }
  .tab-btn { padding: 6px 12px; font-size: 0.8rem; }
}

/* ── REDUCED MOTION ─────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .morse-dot, .morse-dash,
  .progress-bar-fill,
  .timer-bar-fill,
  .answer-btn { transition: none; }
  .answer-btn.wrong { animation: none; }
}