/* ─── Variables ────────────────────────────────────────────── */
:root {
  --bg:       #0f0f0f;
  --text:     #e8e8e8;
  --accent:   #c8963e;
  --font-body: 'IBM Plex Sans', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;
}

/* ─── Reset ─────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
  font-size: 16px;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ─── Nav ───────────────────────────────────────────────────── */
nav { padding: 24px 0; border-bottom: 1px solid rgba(255,255,255,0.1); }
.nav-inner {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.logo { font-family: var(--font-mono); font-size: 15px; color: var(--text); }
.nav-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  opacity: 0.5;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ─── Screens ───────────────────────────────────────────────── */
.screen { display: none; }
.screen.active { display: block; }

/* ─── Intro ─────────────────────────────────────────────────── */
#screen-intro { padding: 64px 24px; }
.intro-inner { max-width: 620px; margin: 0 auto; }
.section-label {
  font-family: var(--font-mono);
  font-size: 12px;
  opacity: 0.5;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}
h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 16px;
}
#screen-intro p {
  font-size: 16px;
  opacity: 0.7;
  margin-bottom: 24px;
  max-width: 480px;
}
.intro-cats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}
.icat {
  border: 1px solid rgba(255,255,255,0.1);
  font-size: 12px;
  opacity: 0.7;
  padding: 5px 12px;
  border-radius: 4px;
  font-family: var(--font-mono);
}
.btn-primary {
  background: var(--accent);
  color: #0f0f0f;
  padding: 10px 20px;
  border-radius: 4px;
  border: none;
  font-family: var(--font-body);
  font-size: 15px;
  cursor: pointer;
  display: inline-block;
}
.btn-primary:hover { opacity: 0.85; text-decoration: none; }
.intro-note { font-size: 13px; opacity: 0.5; margin-top: 12px; margin-bottom: 0; }

/* ─── Quiz ──────────────────────────────────────────────────── */
#screen-quiz { padding: 32px 24px 80px; }
.quiz-wrap {
  max-width: 680px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.progress-bar-wrap {
  background: rgba(255,255,255,0.06);
  border-radius: 4px;
  height: 4px;
  overflow: hidden;
}
.progress-bar {
  height: 100%;
  border-radius: 4px;
  background: var(--accent);
  transition: width 0.5s ease;
}

.progress-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  opacity: 0.6;
}
.q-cat-badge {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  opacity: 0.6;
}

.ai-response-box {
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 4px;
  padding: 20px 22px;
}
.ai-response-header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  font-family: var(--font-mono);
  opacity: 0.5;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}
.ai-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
}
#q-ai-response {
  font-size: 15px;
  opacity: 0.8;
  line-height: 1.75;
  font-style: italic;
  margin: 0;
}

.q-question {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.5;
}

.options-grid {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.option-btn {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 4px;
  padding: 14px 16px;
  font-size: 14px;
  color: var(--text);
  font-family: var(--font-body);
  text-align: left;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  line-height: 1.6;
  opacity: 0.8;
  transition: border-color 0.15s, opacity 0.15s;
}
.option-btn:hover:not(:disabled) {
  border-color: rgba(255,255,255,0.3);
  opacity: 1;
}
.option-letter {
  width: 22px;
  height: 22px;
  border-radius: 3px;
  border: 1px solid rgba(255,255,255,0.2);
  font-size: 11px;
  font-family: var(--font-mono);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.option-btn.correct { border-color: var(--accent); opacity: 1; }
.option-btn.correct .option-letter { background: var(--accent); color: #0f0f0f; border-color: var(--accent); }
.option-btn.wrong { opacity: 0.4; }
.option-btn.dimmed { opacity: 0.3; }
.option-btn:disabled { cursor: default; }

.explanation-box {
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 4px;
  padding: 16px 18px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
}
.explanation-icon { font-size: 16px; flex-shrink: 0; }
#explanation-text { font-size: 14px; opacity: 0.7; line-height: 1.7; margin: 0; }

.btn-next {
  align-self: flex-end;
}
.btn-next:disabled { opacity: 0.3; cursor: not-allowed; }

/* ─── Results ───────────────────────────────────────────────── */
#screen-results { padding: 48px 24px 80px; }
.results-wrap {
  max-width: 640px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

h2 { font-size: 1.5rem; font-weight: 600; }

.score-display {
  display: flex;
  align-items: baseline;
  gap: 6px;
}
.score-num {
  font-family: var(--font-mono);
  font-size: 4rem;
  font-weight: 400;
  color: var(--accent);
  line-height: 1;
}
.score-denom { font-size: 1.25rem; opacity: 0.5; }

.rating-badge {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  opacity: 0.6;
}

.results-sub { opacity: 0.7; font-size: 15px; max-width: 460px; line-height: 1.7; }

.breakdown-section {
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 4px;
  padding: 24px;
}
.breakdown-title {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  opacity: 0.5;
  margin-bottom: 16px;
}
.breakdown-bars { display: flex; flex-direction: column; gap: 14px; }
.bk-row { display: flex; align-items: center; gap: 12px; }
.bk-label-col { width: 140px; font-size: 13px; opacity: 0.7; flex-shrink: 0; }
.bk-bar-wrap {
  flex: 1;
  background: rgba(255,255,255,0.06);
  border-radius: 4px;
  height: 6px;
  overflow: hidden;
}
.bk-bar-fill { height: 100%; border-radius: 4px; background: var(--accent); transition: width 1s ease; }
.bk-score { width: 36px; text-align: right; font-family: var(--font-mono); font-size: 13px; flex-shrink: 0; }

.reco-section {
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 4px;
  padding: 24px;
}
.reco-title {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  opacity: 0.5;
  margin-bottom: 16px;
}
.reco-list { display: flex; flex-direction: column; gap: 12px; }
.reco-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 4px;
}
.reco-icon { font-size: 16px; flex-shrink: 0; }
.reco-text { font-size: 13px; opacity: 0.7; line-height: 1.6; }
.reco-text strong { opacity: 1; display: block; margin-bottom: 3px; font-weight: 600; }

.results-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}
.btn-retry {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.15);
  color: var(--text);
  padding: 10px 20px;
  border-radius: 4px;
  font-size: 14px;
  font-family: var(--font-body);
  cursor: pointer;
  transition: border-color 0.15s;
}
.btn-retry:hover { border-color: rgba(255,255,255,0.35); }
.btn-home { font-size: 14px; opacity: 0.6; }
.btn-home:hover { opacity: 1; text-decoration: none; }

/* ─── Rating classes (applied by quiz.js) ───────────────────── */
.rating-dependent  { color: var(--text); opacity: 0.6; }
.rating-developing { color: var(--text); opacity: 0.7; }
.rating-aware      { color: var(--accent); opacity: 1; }
.rating-literate   { color: var(--accent); opacity: 1; }

/* ─── Category badge classes (applied by quiz.js) ──────────── */
.cat-hallucination,
.cat-bias,
.cat-reasoning,
.cat-overconfidence,
.cat-incomplete { opacity: 0.6; }