/* ============================================================
   QUIZ UAX — Estilos compartidos v2
   Alto contraste · Legibilidad máxima
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:         #0A0908;
  --surface:    #141210;
  --surface-2:  #1C1A17;
  --surface-3:  #242118;
  --border:     rgba(255,255,255,0.09);
  --border-2:   rgba(255,255,255,0.15);
  --text:       #F5F0E8;
  --text-2:     #C8BEA8;
  --muted:      #8A7F6C;
  --ok:         var(--accent);
  --ok-bg:      var(--accent-bg);
  --ok-text:    var(--accent-bright);
  --ok-border:  var(--accent);
  --ko:         #E05252;
  --ko-bg:      rgba(224,82,82,0.12);
  --ko-text:    #F08080;
  --ko-border:  #C04040;
  --font-d:     'Bricolage Grotesque', system-ui, sans-serif;
  --font-s:     'Lato', system-ui, sans-serif;
  --font-m:     'IBM Plex Mono', monospace;
  --radius:     10px;
  --radius-lg:  14px;
}

html { font-size: 16px; }
body {
  font-family: var(--font-s);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
}

/* ── Header ───────────────────────────────────────────── */
.header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 24px;
  height: 52px;
  border-bottom: 1px solid var(--border);
  background: rgba(10,9,8,0.92);
  backdrop-filter: blur(16px);
  position: sticky;
  top: 0;
  z-index: 100;
}
.btn-back {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  text-decoration: none;
  font-family: var(--font-m);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  transition: color 0.2s;
  padding: 4px 0;
}
.btn-back:hover { color: var(--accent-bright); }
.btn-back svg { transition: transform 0.2s; }
.btn-back:hover svg { transform: translateX(-3px); }
.header-title {
  font-family: var(--font-d);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--text);
}
.header-tag {
  margin-left: auto;
  font-family: var(--font-m);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  color: var(--accent-bright);
  background: var(--accent-bg);
  border: 1px solid var(--accent);
  padding: 2px 8px;
  border-radius: 4px;
}

/* ── Main layout ──────────────────────────────────────── */
.main {
  max-width: 760px;
  margin: 0 auto;
  padding: 2rem 1.25rem;
}

/* ── CONFIG PANEL ─────────────────────────────────────── */
#panel-config {
  display: block;
}
.config-card {
  background: var(--surface);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-lg);
  padding: 2rem;
}
.config-title {
  font-family: var(--font-d);
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text);
  margin-bottom: 4px;
}
.config-sub {
  font-family: var(--font-m);
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 1.75rem;
}
.section-label {
  font-family: var(--font-m);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-bright);
  margin-bottom: 10px;
}

/* UF buttons */
.uf-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 1.5rem;
}
.btn-uf {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--surface-2);
  border: 1px solid var(--border-2);
  border-radius: 8px;
  padding: 8px 14px;
  color: var(--text-2);
  font-family: var(--font-s);
  font-size: 0.84rem;
  cursor: pointer;
  transition: all 0.15s;
  text-align: left;
}
.btn-uf .tag {
  font-family: var(--font-m);
  font-size: 0.66rem;
  font-weight: 700;
  color: var(--accent-bright);
  background: var(--accent-bg);
  padding: 2px 6px;
  border-radius: 3px;
  letter-spacing: 0.06em;
  flex-shrink: 0;
}
.btn-uf .uf-count {
  font-family: var(--font-m);
  font-size: 0.66rem;
  color: var(--muted);
  margin-left: auto;
}
.btn-uf:hover {
  border-color: var(--accent);
  color: var(--text);
}
.btn-uf.active {
  border-color: var(--accent);
  background: var(--accent-bg);
  color: var(--text);
}
.btn-uf.active .uf-count { color: var(--accent-bright); }

/* Cantidad */
.cantidad-grid {
  display: flex;
  gap: 8px;
  margin-bottom: 1.5rem;
}
.btn-cantidad {
  flex: 1;
  padding: 10px;
  background: var(--surface-2);
  border: 1px solid var(--border-2);
  border-radius: 8px;
  color: var(--text-2);
  font-family: var(--font-d);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s;
  text-align: center;
}
.btn-cantidad:hover { border-color: var(--accent); color: var(--text); }
.btn-cantidad.active {
  border-color: var(--accent);
  background: var(--accent-bg);
  color: var(--accent-bright);
}

.btn-start {
  width: 100%;
  padding: 14px;
  background: var(--accent);
  color: var(--accent-start-text, #0A0908);
  font-family: var(--font-d);
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: opacity 0.15s, transform 0.1s;
}
.btn-start:hover { opacity: 0.88; }
.btn-start:active { transform: scale(0.99); }

/* ── QUIZ PANEL ───────────────────────────────────────── */
#panel-quiz { display: none; }

.quiz-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}
.quiz-counter {
  font-family: var(--font-m);
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0.04em;
}
.quiz-live-score {
  display: flex;
  gap: 12px;
  font-family: var(--font-m);
  font-size: 0.72rem;
}
.lsc-ok { color: var(--accent-bright); }
.lsc-ko { color: var(--ko-text); }

.progress-bar {
  height: 3px;
  background: var(--surface-3);
  border-radius: 2px;
  margin-bottom: 20px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  transition: width 0.4s cubic-bezier(0.4,0,0.2,1);
}

/* Question card — HIGH CONTRAST */
.q-card {
  background: var(--surface);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 14px;
  animation: qIn 0.22s ease;
}
@keyframes qIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.q-card-header {
  background: var(--surface-2);
  border-bottom: 1px solid var(--border-2);
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.q-uf-pill {
  font-family: var(--font-m);
  font-size: 0.64rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent-bright);
  background: var(--accent-bg);
  border: 1px solid var(--accent);
  padding: 2px 8px;
  border-radius: 4px;
}
.q-num {
  font-family: var(--font-m);
  font-size: 0.68rem;
  color: var(--muted);
}

.q-body {
  padding: 20px 20px 6px;
}
.q-text {
  font-family: var(--font-d);
  font-size: 1.08rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text);
  margin-bottom: 18px;
}

/* Options — very high contrast */
.options {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 0 20px 20px;
}
.btn-opt {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background: var(--surface-3);
  border: 1.5px solid rgba(255,255,255,0.12);
  border-radius: 8px;
  padding: 12px 14px;
  color: var(--text);
  font-family: var(--font-s);
  font-size: 0.94rem;
  line-height: 1.5;
  cursor: pointer;
  text-align: left;
  transition: border-color 0.15s, background 0.15s;
  width: 100%;
}
.btn-opt:hover:not(:disabled) {
  border-color: var(--accent);
  background: var(--surface-2);
}
.btn-opt:disabled { cursor: default; }

.opt-badge {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1.5px solid rgba(255,255,255,0.2);
  border-radius: 5px;
  font-family: var(--font-m);
  font-size: 0.66rem;
  font-weight: 700;
  color: var(--muted);
  margin-top: 1px;
  transition: all 0.15s;
  background: var(--surface-2);
}

/* Correct */
.btn-opt.correct {
  border-color: var(--accent);
  background: var(--accent-bg);
  color: var(--text);
}
.btn-opt.correct .opt-badge {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-start-text, #0A0908);
}

/* Wrong */
.btn-opt.wrong {
  border-color: var(--ko-border);
  background: var(--ko-bg);
  color: var(--text);
}
.btn-opt.wrong .opt-badge {
  background: var(--ko);
  border-color: var(--ko);
  color: #fff;
}

/* Explanation */
.explanation {
  margin: 0 20px 20px;
  padding: 12px 14px;
  background: var(--surface-2);
  border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0;
  font-size: 0.86rem;
  color: var(--text-2);
  line-height: 1.65;
  display: none;
}
.explanation.show { display: block; }

/* Nav */
.quiz-nav {
  display: flex;
  justify-content: flex-end;
  margin-top: 4px;
}
.btn-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--accent);
  border: none;
  border-radius: 8px;
  padding: 10px 22px;
  color: var(--accent-start-text, #0A0908);
  font-family: var(--font-d);
  font-size: 0.9rem;
  font-weight: 800;
  cursor: pointer;
  transition: opacity 0.15s;
  display: none;
}
.btn-nav:hover { opacity: 0.88; }

/* ── RESULTS PANEL ────────────────────────────────────── */
#panel-results { display: none; }

.results-card {
  background: var(--surface);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  text-align: center;
  animation: qIn 0.25s ease;
}
.res-eyebrow {
  font-family: var(--font-m);
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 8px;
}
.res-pct {
  font-family: var(--font-d);
  font-size: 4.5rem;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 6px;
}
.res-pct.high { color: var(--accent-bright); }
.res-pct.mid  { color: #F0A830; }
.res-pct.low  { color: var(--ko-text); }

.res-badge {
  display: inline-block;
  font-family: var(--font-m);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 2rem;
}
.res-badge.high { background: var(--accent-bg); color: var(--accent-bright); border: 1px solid var(--accent); }
.res-badge.mid  { background: rgba(240,168,48,0.12); color: #F0A830; border: 1px solid #F0A830; }
.res-badge.low  { background: var(--ko-bg); color: var(--ko-text); border: 1px solid var(--ko-border); }

.res-stats {
  display: flex;
  justify-content: center;
  gap: 2.5rem;
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}
.stat-n { font-family: var(--font-d); font-size: 2rem; font-weight: 800; }
.stat-l { font-family: var(--font-m); font-size: 0.66rem; letter-spacing: 0.08em; color: var(--muted); margin-top: 2px; }

/* Recomendaciones */
.recomendaciones {
  text-align: left;
  margin-bottom: 2rem;
  background: var(--surface-2);
  border: 1px solid var(--border-2);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
}
.rec-title {
  font-family: var(--font-d);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.rec-items {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.rec-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.84rem;
  line-height: 1.5;
  color: var(--text-2);
}
.rec-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 6px;
}
.rec-dot.bad  { background: var(--ko); }
.rec-dot.warn { background: #F0A830; }
.rec-dot.ok   { background: var(--accent-bright); }
.rec-uf-label {
  font-family: var(--font-m);
  font-size: 0.66rem;
  color: var(--accent-bright);
  background: var(--accent-bg);
  border: 1px solid var(--accent);
  padding: 1px 6px;
  border-radius: 3px;
  margin-right: 6px;
  white-space: nowrap;
}
.nota-final {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 1.5rem;
  font-family: var(--font-m);
  font-size: 0.78rem;
  color: var(--muted);
}
.nota-num {
  font-family: var(--font-d);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text);
}

.res-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: 340px;
  margin: 0 auto;
}
.btn-res {
  padding: 12px;
  border-radius: 8px;
  font-family: var(--font-d);
  font-size: 0.92rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s;
  border: 1px solid var(--border-2);
  background: var(--surface-2);
  color: var(--text);
}
.btn-res:hover { border-color: var(--accent); }
.btn-res.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-start-text, #0A0908);
}
.btn-res.primary:hover { opacity: 0.88; }
.btn-res.ghost { background: transparent; color: var(--muted); }
.btn-res.ghost:hover { color: var(--text); }

/* ── Responsive ───────────────────────────────────────── */
@media (max-width: 680px) {
  .header { 
    padding: 0 14px; 
    flex-wrap: wrap;
    height: auto;
    padding: 8px 14px;
  }
  .header-title { 
    font-size: 0.82rem; 
    order: 1;
  }
  .btn-back { 
    font-size: 0.68rem;
    order: 0;
  }
  .header-tag { 
    font-size: 0.62rem;
    padding: 2px 6px;
    order: 2;
  }
  
  .main { padding: 1.25rem 1rem; }
  .config-card, .results-card { padding: 1.25rem; }
  
  .config-title { 
    font-size: 1.3rem; 
  }
  .config-sub { 
    font-size: 0.68rem;
    margin-bottom: 1.25rem;
  }
  
  .section-label { 
    font-size: 0.64rem;
    margin-bottom: 8px;
  }
  
  /* Selectores de modo en mobile - stacked */
  .mode-selector {
    flex-direction: column;
    gap: 6px;
    padding: 0.4rem;
  }
  
  .btn-mode {
    padding: 0.65rem;
    font-size: 0.82rem;
  }
  
  /* Categorías de código en mobile - grid 2x2 */
  .category-selector {
    display: grid !important;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
  }
  .category-selector.visible {
    display: grid !important;
  }
  
  .btn-category {
    padding: 0.65rem 0.4rem;
    font-size: 0.8rem;
  }
  
  /* UF Grid responsive - 2 columnas */
  .uf-grid { 
    gap: 6px;
    display: grid;
    grid-template-columns: 1fr 1fr;
  }
  .btn-uf { 
    font-size: 0.78rem;
    padding: 8px 10px;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }
  .btn-uf .tag {
    font-size: 0.62rem;
  }
  .btn-uf .uf-count {
    margin-left: 0;
    align-self: flex-end;
  }
  
  .btn-todo {
    font-size: 0.8rem;
    padding: 8px 12px;
  }
  
  .cantidad-grid { 
    gap: 6px; 
  }
  .btn-cantidad {
    font-size: 0.92rem;
  }
  
  .btn-start {
    font-size: 0.92rem;
    padding: 12px;
  }
  
  /* Quiz panel mobile */
  .q-body { padding: 16px 14px 4px; }
  .q-text {
    font-size: 1rem;
  }
  .options { padding: 0 14px 14px; }
  .btn-opt {
    font-size: 0.88rem;
    padding: 10px 12px;
  }
  .explanation { 
    margin: 0 14px 14px;
    font-size: 0.84rem;
  }
  
  /* Results mobile */
  .res-pct {
    font-size: 3.5rem;
  }
  .res-stats { 
    gap: 1.5rem; 
    flex-wrap: wrap;
  }
  .stat-n {
    font-size: 1.6rem;
  }
  .recomendaciones {
    padding: 1rem 1.25rem;
  }
  .rec-item {
    font-size: 0.82rem;
  }
  
  /* Temario mobile */
  .temario-item {
    padding: 0.75rem;
    gap: 0.75rem;
  }
  .temario-icon {
    width: 40px;
    height: 40px;
    font-size: 0.7rem;
  }
  .temario-uf {
    font-size: 0.66rem;
  }
  .temario-title {
    font-size: 0.88rem;
  }
  .temario-pages {
    font-size: 0.66rem;
  }
  .temario-header-title {
    font-size: 0.66rem;
  }
  .temario-count {
    font-size: 0.66rem;
  }
}

/* ── Botón Todo el temario ────────────────────────────── */
.btn-todo {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--surface-2);
  border: 1px dashed var(--border-2);
  border-radius: 8px;
  padding: 8px 16px;
  color: var(--text-2);
  font-family: var(--font-s);
  font-size: 0.84rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s;
  margin-bottom: 10px;
  width: 100%;
}
.btn-todo .todo-icon {
  color: var(--accent-bright);
  font-size: 0.9rem;
}
.btn-todo:hover {
  border-color: var(--accent);
  color: var(--text);
  border-style: solid;
}
.btn-todo.active {
  border-color: var(--accent);
  border-style: solid;
  background: var(--accent-bg);
  color: var(--text);
}