/* ── Index / Landing Page ─────────────────────────────────────────────── */
.hero {
  text-align: center;
  padding: 60px 20px 48px;
}
.hero-title {
  font-family: var(--orb);
  font-size: clamp(28px, 6vw, 56px);
  font-weight: 900;
  letter-spacing: 3px;
  text-transform: uppercase;
  background: linear-gradient(135deg, var(--accent) 0%, #80f0ff 50%, var(--green) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
  line-height: 1.1;
}
.hero-subtitle {
  color: var(--muted);
  font-size: 1rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.hero-callsign {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--dim);
  letter-spacing: 4px;
}

/* ── Pool Cards Grid ──────────────────────────────────────────────────── */
.pool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-bottom: 48px;
}
.pool-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: all 0.2s ease;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow);
}
.pool-card:hover {
  transform: translateY(-3px);
  text-decoration: none;
  color: inherit;
}
.pool-card.tech:hover   { border-color: var(--accent); box-shadow: var(--glow); }
.pool-card.general:hover { border-color: var(--gold); box-shadow: 0 0 20px rgba(255,215,0,0.2); }
.pool-card.extra:hover  { border-color: var(--red); box-shadow: var(--glow-r); }

.pool-icon {
  font-size: 2.2rem;
  line-height: 1;
}
.pool-card h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 4px;
}
.pool-card p {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.5;
  flex: 1;
}
.pool-meta {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  font-size: 0.8rem;
  color: var(--dim);
  font-family: var(--mono);
  margin-top: 4px;
}
.pool-card .btn {
  align-self: flex-start;
  margin-top: 6px;
}

/* ── Guides section ───────────────────────────────────────────────────── */
.guides-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
  margin-bottom: 40px;
}
.guide-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.9rem;
  transition: all 0.18s;
  text-decoration: none;
}
.guide-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
  transform: translateY(-1px);
}
.guide-icon { font-size: 1.2rem; flex-shrink: 0; }

/* ── Quiz Page Layout ─────────────────────────────────────────────────── */
.quiz-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 20px;
  align-items: start;
}
@media (max-width: 900px) {
  .quiz-layout { grid-template-columns: 1fr; }
  .quiz-sidebar { order: -1; }
}

/* ── Mode Selector ────────────────────────────────────────────────────── */
.mode-tabs {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}
.mode-tab {
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.18s;
  letter-spacing: 0.5px;
}
.mode-tab:hover { border-color: var(--accent); color: var(--accent); }
.mode-tab.active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
}

/* ── Filters Bar ──────────────────────────────────────────────────────── */
.filters {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 20px;
  align-items: center;
}
.filter-select {
  padding: 8px 14px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font);
  font-size: 0.9rem;
  cursor: pointer;
  transition: border-color 0.18s;
  min-width: 0;
  flex: 1;
}
.filter-select:focus { outline: none; border-color: var(--accent); }

/* ── Question Card ────────────────────────────────────────────────────── */
.question-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}
.question-meta {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.question-number {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 1px;
}
.question-text {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  font-weight: 600;
  color: var(--text);
  line-height: 1.55;
  margin-bottom: 24px;
}
.sub-element {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--dim);
  letter-spacing: 1px;
}

/* ── Answer Choices ───────────────────────────────────────────────────── */
.answers {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}
.answer-btn {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font);
  font-size: 1rem;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  transition: all 0.18s ease;
  line-height: 1.4;
  width: 100%;
}
.answer-btn:hover:not(:disabled) {
  border-color: var(--accent);
  background: rgba(0,229,255,0.06);
  transform: translateX(3px);
}
.answer-btn:disabled { cursor: default; }
.answer-btn.correct {
  border-color: var(--green);
  background: rgba(0,230,118,0.12);
  color: var(--green);
  box-shadow: var(--glow-g);
}
.answer-btn.wrong {
  border-color: var(--red);
  background: rgba(255,71,87,0.1);
  color: var(--red);
  opacity: 0.7;
}
.answer-btn.selected-wrong {
  border-color: var(--red);
  background: rgba(255,71,87,0.15);
  color: var(--red);
  box-shadow: var(--glow-r);
  opacity: 1;
}
.answer-letter {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1.5px solid currentColor;
  font-family: var(--mono);
  font-size: 0.8rem;
  font-weight: 700;
  flex-shrink: 0;
  opacity: 0.7;
}

/* ── Feedback Banner ──────────────────────────────────────────────────── */
.feedback {
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  animation: fadeUp 0.2s ease;
  margin-bottom: 16px;
  line-height: 1.45;
}
.feedback.correct {
  background: rgba(0,230,118,0.12);
  border: 1px solid rgba(0,230,118,0.3);
  color: var(--green);
}
.feedback.wrong {
  background: rgba(255,71,87,0.1);
  border: 1px solid rgba(255,71,87,0.25);
  color: #ff8080;
}

/* ── Quiz Nav Buttons ─────────────────────────────────────────────────── */
.quiz-nav {
  display: flex;
  gap: 10px;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

/* ── Sidebar / Stats ──────────────────────────────────────────────────── */
.quiz-sidebar {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
}
.stat-card h3 {
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.stat-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 0;
  border-bottom: 1px solid var(--bg3);
  font-size: 0.9rem;
}
.stat-row:last-child { border-bottom: none; }
.stat-label { color: var(--muted); }
.stat-value { font-family: var(--mono); font-weight: 700; }
.stat-value.green { color: var(--green); }
.stat-value.gold  { color: var(--gold); }
.stat-value.red   { color: var(--red); }

.big-stat {
  text-align: center;
  padding: 6px 0 12px;
}
.big-stat-num {
  font-family: var(--mono);
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}
.big-stat-label {
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-top: 4px;
}

/* ── Flashcard Mode ───────────────────────────────────────────────────── */
.flashcard-wrap {
  perspective: 1200px;
  margin: 0 auto 24px;
  max-width: 600px;
}
.flashcard {
  position: relative;
  min-height: 220px;
  transform-style: preserve-3d;
  transition: transform 0.45s cubic-bezier(.4,0,.2,1);
  cursor: pointer;
  border-radius: var(--radius);
}
.flashcard.flipped { transform: rotateY(180deg); }
.flashcard-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 28px;
  text-align: center;
}
.flashcard-face.back {
  transform: rotateY(180deg);
  border-color: var(--green);
  background: rgba(0,230,118,0.05);
}
.flashcard-hint {
  position: absolute;
  bottom: 12px;
  right: 16px;
  font-size: 0.7rem;
  color: var(--dim);
  font-family: var(--mono);
}
.flashcard-q {
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1.5;
}
.flashcard-a {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--green);
  line-height: 1.4;
}
.flashcard-nav {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Rapid Cram Mode ──────────────────────────────────────────────────── */
.cram-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 10px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
  animation: fadeUp 0.2s ease;
  transition: border-color 0.18s;
}
.cram-item:hover { border-color: var(--dim); }
.cram-q {
  flex: 1;
  font-size: 0.95rem;
  color: var(--muted);
  line-height: 1.5;
}
.cram-q strong {
  color: var(--gold);
  font-weight: 700;
}
.cram-a {
  font-family: var(--mono);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--accent);
  white-space: nowrap;
  padding-left: 12px;
  border-left: 2px solid var(--accent);
  text-align: right;
  min-width: 140px;
}

/* ── Exam Results ─────────────────────────────────────────────────────── */
.result-hero {
  text-align: center;
  padding: 40px 20px;
}
.result-score {
  font-family: var(--mono);
  font-size: clamp(3rem, 10vw, 6rem);
  font-weight: 700;
  line-height: 1;
  margin-bottom: 12px;
}
.result-score.pass { color: var(--green); }
.result-score.fail { color: var(--red); }
.result-label {
  font-size: 1.1rem;
  color: var(--muted);
  margin-bottom: 24px;
  letter-spacing: 2px;
  text-transform: uppercase;
}
.result-verdict {
  font-size: 1.5rem;
  font-weight: 700;
  padding: 12px 32px;
  border-radius: var(--radius-sm);
  display: inline-block;
  margin-bottom: 32px;
}
.result-verdict.pass { background: rgba(0,230,118,0.15); color: var(--green); border: 1px solid rgba(0,230,118,0.3); }
.result-verdict.fail { background: rgba(255,71,87,0.12); color: var(--red);   border: 1px solid rgba(255,71,87,0.25); }

/* ── Empty / Loading states ───────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--muted);
}
.empty-state .emoji { font-size: 3rem; margin-bottom: 16px; }

/* ── Category progress bars ───────────────────────────────────────────── */
.cat-bar-row {
  margin-bottom: 10px;
}
.cat-bar-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 4px;
}
.cat-bar-pct { font-family: var(--mono); }
.cat-bar {
  height: 5px;
  background: var(--bg3);
  border-radius: 3px;
  overflow: hidden;
}
.cat-bar-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.6s ease;
}

/* ── Pool header on quiz pages ────────────────────────────────────────── */
.pool-header {
  margin-bottom: 24px;
}
.pool-header h1 {
  font-family: var(--orb);
  font-size: clamp(1.4rem, 4vw, 2rem);
  letter-spacing: 2px;
  margin-bottom: 6px;
}
.pool-desc {
  color: var(--muted);
  font-size: 0.95rem;
}

/* ── Study Guide view ─────────────────────────────────────────────────── */
.guide-entry {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 12px;
  animation: fadeUp 0.2s ease;
}
.guide-entry h3 {
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 10px;
  font-family: var(--mono);
}
.guide-entry p {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ── Mobile tweaks ────────────────────────────────────────────────────── */
@media (max-width: 600px) {
  .question-card { padding: 18px; }
  .question-text { font-size: 1rem; }
  .answer-btn { padding: 12px 14px; font-size: 0.95rem; }
  .mode-tabs { gap: 4px; }
  .mode-tab { padding: 7px 12px; font-size: 0.82rem; }
  .cram-item { flex-direction: column; gap: 10px; }
  .cram-a { border-left: none; border-top: 1px solid var(--accent); padding-left: 0; padding-top: 8px; text-align: left; min-width: 0; white-space: normal; }
  .pool-grid { grid-template-columns: 1fr; }
  .guides-grid { grid-template-columns: 1fr 1fr; }
  .flashcard-face { padding: 20px 16px; }
  .flashcard { min-height: 200px; }
}
@media (max-width: 380px) {
  .guides-grid { grid-template-columns: 1fr; }
}