/* Estilos Principales - Plataforma OpositaUjier */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Outfit:wght@400;600;700;800&display=swap');

:root {
  --bg-dark: #0f172a;
  --bg-card: #1e293b;
  --bg-card-hover: #334155;
  --accent-gold: #f59e0b;
  --accent-amber: #d97706;
  --accent-blue: #3b82f6;
  --accent-indigo: #6366f1;
  --accent-green: #10b981;
  --accent-red: #ef4444;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --border-color: rgba(255, 255, 255, 0.1);
  --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
  --glass-bg: rgba(30, 41, 59, 0.7);
  --glass-border: rgba(255, 255, 255, 0.12);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header & Navbar */
header {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--glass-border);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 1rem 2rem;
}

.nav-container {
  max-width: 1300px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-icon {
  background: linear-gradient(135deg, var(--accent-gold), var(--accent-amber));
  width: 42px;
  height: 42px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.25rem;
  color: #000;
  box-shadow: 0 4px 14px rgba(245, 158, 11, 0.4);
}

.logo-title h1 {
  font-family: 'Outfit', sans-serif;
  font-size: 1.35rem;
  font-weight: 700;
  background: linear-gradient(to right, #ffffff, #cbd5e1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-title p {
  font-size: 0.75rem;
  color: var(--accent-gold);
  font-weight: 600;
  letter-spacing: 0.5px;
}

/* Navigation Tabs */
.nav-tabs {
  display: flex;
  gap: 0.5rem;
  background: rgba(15, 23, 42, 0.6);
  padding: 0.35rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 0.6rem 1.1rem;
  font-size: 0.88rem;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.tab-btn:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.05);
}

.tab-btn.active {
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-indigo));
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

/* Main Layout */
main {
  flex: 1;
  max-width: 1300px;
  width: 100%;
  margin: 2rem auto;
  padding: 0 1.5rem;
}

.tab-content {
  display: none;
  animation: fadeIn 0.3s ease-in-out;
}

.tab-content.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Hero & Dashboard */
.hero-card {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.9), rgba(15, 23, 42, 0.95)), url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><rect fill="none" width="100" height="100"/><circle cx="50" cy="50" r="40" stroke="rgba(245,158,11,0.05)" stroke-width="2" fill="none"/></svg>');
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 2.5rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-lg);
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 2rem;
  align-items: center;
}

.hero-text h2 {
  font-family: 'Outfit', sans-serif;
  font-size: 2.2rem;
  margin-bottom: 0.75rem;
  color: #ffffff;
}

.hero-text p {
  color: var(--text-muted);
  line-size: 1.6;
  font-size: 1rem;
  margin-bottom: 1.5rem;
}

.badge-convocatoria {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(245, 158, 11, 0.15);
  color: var(--accent-gold);
  border: 1px solid rgba(245, 158, 11, 0.3);
  padding: 0.4rem 0.9rem;
  border-radius: 30px;
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.quick-stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.stat-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 1.25rem;
  border-radius: 14px;
  text-align: center;
  transition: transform 0.2s ease;
}

.stat-box:hover {
  transform: translateY(-3px);
  border-color: var(--accent-blue);
}

.stat-number {
  font-family: 'Outfit', sans-serif;
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--accent-gold);
  margin-bottom: 0.25rem;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 600;
}

/* Exam Simulator Card */
.quiz-container {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: 18px;
  padding: 2rem;
  box-shadow: var(--shadow-lg);
}

.quiz-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1.5rem;
}

.timer-badge {
  background: rgba(239, 68, 68, 0.15);
  color: var(--accent-red);
  border: 1px solid rgba(239, 68, 68, 0.3);
  padding: 0.5rem 1rem;
  border-radius: 10px;
  font-weight: 700;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.question-text {
  font-size: 1.2rem;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 1.5rem;
  color: #f1f5f9;
}

.options-grid {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-bottom: 2rem;
}

.option-btn {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 1.1rem 1.25rem;
  border-radius: 12px;
  font-size: 0.98rem;
  text-align: left;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.option-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-blue);
}

.option-btn.selected {
  border-color: var(--accent-gold);
  background: rgba(245, 158, 11, 0.12);
  font-weight: 600;
}

.option-btn.correct {
  background: rgba(16, 185, 129, 0.2) !important;
  border-color: var(--accent-green) !important;
  color: #a7f3d0;
}

.option-btn.wrong {
  background: rgba(239, 68, 68, 0.2) !important;
  border-color: var(--accent-red) !important;
  color: #fecaca;
}

.option-letter {
  background: rgba(255, 255, 255, 0.08);
  width: 28px;
  height: 28px;
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--accent-gold);
  flex-shrink: 0;
}

.explanation-box {
  background: rgba(59, 130, 246, 0.1);
  border-left: 4px solid var(--accent-blue);
  padding: 1.25rem;
  border-radius: 0 10px 10px 0;
  margin-bottom: 1.5rem;
  display: none;
}

.quiz-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-indigo));
  color: white;
  border: none;
  padding: 0.8rem 1.6rem;
  border-radius: 10px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-2px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  padding: 0.8rem 1.5rem;
  border-radius: 10px;
  font-weight: 600;
  cursor: pointer;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
}

/* Search Bar for Temario */
.search-bar-box {
  margin-bottom: 1.5rem;
  display: flex;
  gap: 1rem;
}

.search-input {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.85rem 1.25rem;
  border-radius: 12px;
  font-size: 1rem;
  outline: none;
  transition: border-color 0.2s ease;
}

.search-input:focus {
  border-color: var(--accent-gold);
}

/* Temario Accordion Cards */
.temas-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.25rem;
}

.tema-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 1.5rem;
  transition: all 0.25 ease;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.tema-card:hover {
  border-color: var(--accent-gold);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.tema-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent-gold);
  margin-bottom: 0.6rem;
  line-height: 1.4;
}

.tema-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 1.25rem;
}

.tema-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 0.5rem;
}

.tema-badge {
  display: inline-block;
  background: rgba(59, 130, 246, 0.15);
  color: var(--accent-blue);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 0.3rem 0.65rem;
  border-radius: 6px;
}

.btn-read-tema {
  background: rgba(245, 158, 11, 0.15);
  color: var(--accent-gold);
  border: 1px solid rgba(245, 158, 11, 0.3);
  padding: 0.4rem 0.85rem;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-read-tema:hover {
  background: var(--accent-gold);
  color: #000;
}

/* Modal Lector de Temas */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: none;
  justify-content: center;
  align-items: center;
  padding: 2rem;
}

.modal-backdrop.active {
  display: flex;
  animation: fadeIn 0.25s ease-out;
}

.modal-content {
  background: #1e293b;
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  max-width: 900px;
  width: 100%;
  max-height: 88vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
  overflow: hidden;
}

.modal-header {
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(15, 23, 42, 0.5);
}

.modal-header h3 {
  font-family: 'Outfit', sans-serif;
  font-size: 1.4rem;
  color: var(--accent-gold);
}

.modal-close-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  width: 36px;
  height: 36px;
  border-radius: 10px;
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close-btn:hover {
  color: white;
  background: rgba(239, 68, 68, 0.2);
  border-color: var(--accent-red);
}

.modal-body {
  padding: 2rem;
  overflow-y: auto;
  line-height: 1.7;
  color: #e2e8f0;
}

.modal-body h4 {
  font-size: 1.15rem;
  color: var(--accent-blue);
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
  border-bottom: 1px solid rgba(59, 130, 246, 0.2);
  padding-bottom: 0.4rem;
}

.modal-body ul, .modal-body ol {
  margin-left: 1.5rem;
  margin-bottom: 1rem;
}

.modal-body li {
  margin-bottom: 0.5rem;
}

.modal-body p {
  margin-bottom: 1rem;
}

/* Flashcards Container */
.flashcard-wrapper {
  perspective: 1000px;
  max-width: 550px;
  height: 320px;
  margin: 2rem auto;
  cursor: pointer;
}

.flashcard-inner {
  position: relative;
  width: 100%;
  height: 100%;
  text-align: center;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  transform-style: preserve-3d;
}

.flashcard-wrapper.flipped .flashcard-inner {
  transform: rotateY(180deg);
}

.flashcard-front, .flashcard-back {
  position: absolute;
  width: 100%;
  height: 100%;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  border-radius: 20px;
  padding: 1.5rem 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-lg);
}

.card-top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.card-cat-badge {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: rgba(59, 130, 246, 0.2);
  color: #93c5fd;
  padding: 0.25rem 0.6rem;
  border-radius: 6px;
}

.card-status-pill {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-muted);
}

.card-status-pill.status-mastered {
  background: rgba(16, 185, 129, 0.2);
  color: var(--accent-green);
  border: 1px solid rgba(16, 185, 129, 0.4);
}

.card-status-pill.status-doubt {
  background: rgba(245, 158, 11, 0.2);
  color: var(--accent-gold);
  border: 1px solid rgba(245, 158, 11, 0.4);
}

.card-status-pill.status-review {
  background: rgba(239, 68, 68, 0.2);
  color: var(--accent-red);
  border: 1px solid rgba(239, 68, 68, 0.4);
}

.btn-tts {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-color);
  color: #ffffff;
  padding: 0.25rem 0.55rem;
  border-radius: 6px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-tts:hover {
  background: var(--accent-blue);
  transform: scale(1.1);
}

.flashcard-front {
  background: linear-gradient(135deg, #1e293b, #0f172a);
  color: var(--text-main);
}

.flashcard-back {
  background: linear-gradient(135deg, #1e3a8a, #0f172a);
  color: #ffffff;
  transform: rotateY(180deg);
}

.flashcard-text {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.5;
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  text-align: center;
  padding: 0.5rem 0;
}

.card-flip-hint {
  font-size: 0.78rem;
  color: var(--accent-gold);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Anki Dashboard & Leitner Controls */
.anki-dashboard-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 18px;
  padding: 1.5rem 2rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow-lg);
}

.anki-header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1rem;
}

.anki-mastery-badge {
  background: radial-gradient(circle, rgba(16, 185, 129, 0.15) 0%, rgba(15, 23, 42, 0.7) 80%);
  border: 2px solid var(--accent-green);
  border-radius: 12px;
  padding: 0.4rem 1.25rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-width: 95px;
}

.anki-segmented-bar {
  width: 100%;
  height: 12px;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  overflow: hidden;
  display: flex;
  margin-bottom: 1rem;
}

.seg-fill {
  height: 100%;
  transition: width 0.4s ease;
}

.seg-mastered { background: var(--accent-green); }
.seg-doubt { background: var(--accent-gold); }
.seg-review { background: var(--accent-red); }

.anki-stats-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 1rem;
}

.anki-stat-chip {
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.chip-mastered { background: rgba(16, 185, 129, 0.15); border-color: rgba(16, 185, 129, 0.3); color: #a7f3d0; }
.chip-doubt { background: rgba(245, 158, 11, 0.15); border-color: rgba(245, 158, 11, 0.3); color: #fde68a; }
.chip-review { background: rgba(239, 68, 68, 0.15); border-color: rgba(239, 68, 68, 0.3); color: #fca5a5; }
.chip-unseen { background: rgba(148, 163, 184, 0.15); border-color: rgba(148, 163, 184, 0.3); color: #cbd5e1; }

.anki-reset-btn {
  margin-left: auto;
  background: transparent;
  border: 1px dashed var(--border-color);
  color: var(--text-muted);
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.anki-reset-btn:hover {
  color: var(--accent-red);
  border-color: var(--accent-red);
}

.anki-filters-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  border-top: 1px solid var(--border-color);
  padding-top: 0.85rem;
}

.anki-filter-group {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.anki-filter-btn {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.anki-filter-btn:hover {
  color: #ffffff;
  border-color: var(--accent-gold);
}

.anki-filter-btn.active {
  background: var(--accent-gold);
  color: #000000;
  border-color: var(--accent-gold);
  font-weight: 700;
}

.anki-select {
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.4rem 0.85rem;
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  outline: none;
}

.anki-rating-row {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 1.25rem;
  flex-wrap: wrap;
}

.btn-anki {
  padding: 0.85rem 1.6rem;
  border-radius: 12px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.2s ease;
  border: 1px solid transparent;
}

.btn-anki-review {
  background: rgba(239, 68, 68, 0.15);
  border-color: rgba(239, 68, 68, 0.4);
  color: #fca5a5;
}

.btn-anki-review:hover {
  background: var(--accent-red);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(239, 68, 68, 0.4);
}

.btn-anki-doubt {
  background: rgba(245, 158, 11, 0.15);
  border-color: rgba(245, 158, 11, 0.4);
  color: #fde68a;
}

.btn-anki-doubt:hover {
  background: var(--accent-gold);
  color: #000000;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(245, 158, 11, 0.4);
}

.btn-anki-mastered {
  background: rgba(16, 185, 129, 0.15);
  border-color: rgba(16, 185, 129, 0.4);
  color: #a7f3d0;
}

.btn-anki-mastered:hover {
  background: var(--accent-green);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4);
}

.anki-key-hint {
  font-size: 0.72rem;
  opacity: 0.8;
  background: rgba(0, 0, 0, 0.35);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
}

.anki-shortcuts-hint {
  text-align: center;
  margin-top: 1.25rem;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.anki-shortcuts-hint kbd {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 0.15rem 0.45rem;
  font-family: monospace;
  color: #ffffff;
}

/* Strategy Calculator & Progress */
.calculator-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 2rem;
  border-radius: 16px;
  max-width: 600px;
  margin: 0 auto;
}

.calc-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
}

.calc-input {
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--border-color);
  color: white;
  padding: 0.6rem 1rem;
  border-radius: 8px;
  width: 100px;
  text-align: center;
  font-size: 1.1rem;
  font-weight: 700;
}

.calc-result {
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: var(--accent-green);
  padding: 1.25rem;
  border-radius: 12px;
  text-align: center;
  font-size: 1.5rem;
  font-weight: 800;
  margin-top: 1.5rem;
}

/* Quiz Controls & Navigation Grid */
.quiz-header-controls {
  display: flex;
  gap: 0.65rem;
  align-items: center;
  flex-wrap: wrap;
}

.btn-flag {
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.35);
  color: var(--accent-gold);
  border-radius: 8px;
  font-weight: 700;
  padding: 0.5rem 0.85rem;
  font-size: 0.85rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  transition: all 0.2s ease;
}

.btn-flag:hover {
  background: rgba(245, 158, 11, 0.25);
}

.btn-flag.active {
  background: var(--accent-gold);
  color: #000;
  box-shadow: 0 0 12px rgba(245, 158, 11, 0.5);
}

.btn-grid-toggle {
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.35);
  color: var(--accent-blue);
  border-radius: 8px;
  font-weight: 700;
  padding: 0.5rem 0.85rem;
  font-size: 0.85rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  transition: all 0.2s ease;
}

.btn-grid-toggle:hover {
  background: rgba(59, 130, 246, 0.25);
}

.btn-grid-toggle.active {
  background: var(--accent-blue);
  color: #fff;
}

.quiz-grid-panel {
  background: rgba(15, 23, 42, 0.95);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 1.25rem;
  margin-bottom: 1.5rem;
  animation: fadeIn 0.2s ease-out;
}

.grid-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.75rem;
}

.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
  margin-right: 5px;
  vertical-align: middle;
}

.dot-current { background: var(--accent-indigo); box-shadow: 0 0 6px var(--accent-indigo); }
.dot-answered { background: var(--accent-blue); }
.dot-unanswered { background: rgba(255, 255, 255, 0.2); }
.dot-flagged { background: var(--accent-gold); box-shadow: 0 0 6px var(--accent-gold); }

.quiz-questions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(38px, 1fr));
  gap: 6px;
  max-height: 220px;
  overflow-y: auto;
  padding-right: 4px;
}

.grid-q-btn {
  height: 38px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
  font-weight: 700;
  font-size: 0.82rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: all 0.15s ease;
}

.grid-q-btn:hover {
  border-color: var(--accent-blue);
  color: #ffffff;
  transform: scale(1.05);
}

.grid-q-btn.answered {
  background: rgba(59, 130, 246, 0.25);
  color: #93c5fd;
  border-color: rgba(59, 130, 246, 0.6);
}

.grid-q-btn.flagged {
  border-color: var(--accent-gold) !important;
  color: var(--accent-gold) !important;
  font-weight: 800;
}

.grid-q-btn.flagged::after {
  content: '•';
  color: var(--accent-gold);
  position: absolute;
  top: -2px;
  right: 4px;
  font-size: 1.1rem;
}

.grid-q-btn.current {
  outline: 2px solid #ffffff;
  outline-offset: 1px;
  background: var(--accent-indigo) !important;
  color: #ffffff !important;
  font-weight: 800;
}

/* Quiz Results Screen & Diagnostics */
.quiz-results-card {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 2.25rem;
  box-shadow: var(--shadow-lg);
  animation: fadeIn 0.3s ease-out;
}

.results-header {
  display: flex;
  align-items: center;
  gap: 2rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 2rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.score-circle-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.score-circle {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 4px solid var(--accent-gold);
  background: radial-gradient(circle, rgba(245, 158, 11, 0.15) 0%, rgba(15, 23, 42, 0.7) 80%);
}

.score-circle.pass {
  border-color: var(--accent-green);
  background: radial-gradient(circle, rgba(16, 185, 129, 0.15) 0%, rgba(15, 23, 42, 0.7) 80%);
}

.score-circle.plaza {
  border-color: var(--accent-gold);
  box-shadow: 0 0 25px rgba(245, 158, 11, 0.4);
}

.score-circle.fail {
  border-color: var(--accent-red);
  background: radial-gradient(circle, rgba(239, 68, 68, 0.15) 0%, rgba(15, 23, 42, 0.7) 80%);
}

.score-big {
  font-size: 2.3rem;
  font-weight: 800;
  font-family: 'Outfit', sans-serif;
  line-height: 1;
}

.score-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 600;
  margin-top: 4px;
}

.verdict-badge {
  font-size: 0.82rem;
  font-weight: 800;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.verdict-badge.pass {
  background: rgba(16, 185, 129, 0.2);
  color: var(--accent-green);
  border: 1px solid var(--accent-green);
}

.verdict-badge.plaza {
  background: rgba(245, 158, 11, 0.2);
  color: var(--accent-gold);
  border: 1px solid var(--accent-gold);
}

.verdict-badge.fail {
  background: rgba(239, 68, 68, 0.2);
  color: var(--accent-red);
  border: 1px solid var(--accent-red);
}

.results-summary-info {
  flex: 1;
  min-width: 280px;
}

.results-chips-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.metric-chip {
  font-size: 0.85rem;
  padding: 0.45rem 0.85rem;
  border-radius: 8px;
  font-weight: 500;
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.chip-correct { background: rgba(16, 185, 129, 0.15); border-color: rgba(16, 185, 129, 0.3); color: #a7f3d0; }
.chip-wrong { background: rgba(239, 68, 68, 0.15); border-color: rgba(239, 68, 68, 0.3); color: #fca5a5; }
.chip-blank { background: rgba(148, 163, 184, 0.15); border-color: rgba(148, 163, 184, 0.3); color: #cbd5e1; }
.chip-flagged { background: rgba(245, 158, 11, 0.15); border-color: rgba(245, 158, 11, 0.3); color: #fde68a; }
.chip-net { background: rgba(99, 102, 241, 0.15); border-color: rgba(99, 102, 241, 0.3); color: #c7d2fe; font-weight: 700; }

.results-section {
  margin-bottom: 2rem;
}

.topic-breakdown-container {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.topic-row {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.topic-row-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.88rem;
  color: #e2e8f0;
  font-weight: 600;
}

.topic-bar-bg {
  width: 100%;
  height: 9px;
  background: rgba(15, 23, 42, 0.8);
  border-radius: 5px;
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.topic-bar-fill {
  height: 100%;
  border-radius: 5px;
  transition: width 0.6s ease;
}

.results-actions-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  border-top: 1px solid var(--border-color);
  padding-top: 1.5rem;
}

.filter-chip {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.filter-chip.active {
  background: var(--accent-gold);
  color: #000;
  border-color: var(--accent-gold);
}

.review-questions-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  max-height: 550px;
  overflow-y: auto;
  padding-right: 6px;
}

.review-item {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.25rem;
}

.review-item.status-correct { border-left: 4px solid var(--accent-green); }
.review-item.status-wrong { border-left: 4px solid var(--accent-red); }
.review-item.status-blank { border-left: 4px solid var(--text-muted); }

.review-q-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.review-q-num {
  font-weight: 700;
  font-size: 0.95rem;
  color: #fff;
}

.review-tag {
  font-size: 0.75rem;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-weight: 700;
}

.tag-correct { background: rgba(16, 185, 129, 0.2); color: var(--accent-green); }
.tag-wrong { background: rgba(239, 68, 68, 0.2); color: var(--accent-red); }
.tag-blank { background: rgba(148, 163, 184, 0.2); color: #cbd5e1; }

.review-q-text {
  font-size: 1rem;
  color: #f1f5f9;
  line-height: 1.5;
  margin-bottom: 0.85rem;
}

.review-options {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 0.85rem;
}

.review-opt {
  padding: 0.55rem 0.85rem;
  border-radius: 8px;
  font-size: 0.88rem;
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.review-opt.opt-correct {
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid var(--accent-green);
  color: #a7f3d0;
  font-weight: 600;
}

.review-opt.opt-user-wrong {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid var(--accent-red);
  color: #fca5a5;
  font-weight: 600;
}

.review-citation {
  background: rgba(59, 130, 246, 0.1);
  border-left: 3px solid var(--accent-blue);
  padding: 0.75rem 1rem;
  border-radius: 0 8px 8px 0;
  font-size: 0.85rem;
  color: #cbd5e1;
  line-height: 1.5;
}

/* Custom Test Modal & Configurator */
.custom-test-modal-content {
  max-width: 960px !important;
}

.custom-test-modal-body {
  padding: 1.5rem 2rem;
  overflow-y: auto;
  max-height: 75vh;
}

.preset-topics-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 0.75rem;
}

.preset-btn {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 0.35rem 0.75rem;
  border-radius: 8px;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.preset-btn:hover {
  background: rgba(99, 102, 241, 0.2);
  color: #ffffff;
  border-color: var(--accent-indigo);
}

.topics-checkbox-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 0.6rem;
  max-height: 240px;
  overflow-y: auto;
  padding: 0.75rem;
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  margin-bottom: 1.25rem;
}

.topic-checkbox-card {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 0.85rem;
  border-radius: 8px;
  background: rgba(30, 41, 59, 0.6);
  border: 1px solid transparent;
  cursor: pointer;
  font-size: 0.84rem;
  color: #cbd5e1;
  user-select: none;
  transition: all 0.15s ease;
}

.topic-checkbox-card:hover {
  background: rgba(51, 65, 85, 0.8);
  border-color: rgba(255, 255, 255, 0.15);
  color: #ffffff;
}

.topic-checkbox-card.selected {
  background: rgba(99, 102, 241, 0.18);
  border-color: var(--accent-indigo);
  color: #ffffff;
}

.topic-checkbox-card input[type="checkbox"] {
  accent-color: var(--accent-indigo);
  width: 16px;
  height: 16px;
  cursor: pointer;
}

.topic-badge-count {
  margin-left: auto;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-gold);
  background: rgba(245, 158, 11, 0.12);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
}

.custom-test-config-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 1.25rem;
}

.radio-pill-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.radio-pill-label {
  display: inline-flex;
  align-items: center;
  cursor: pointer;
}

.radio-pill-label input {
  display: none;
}

.radio-pill-label span {
  padding: 0.5rem 0.85rem;
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  border: 1px solid var(--border-color);
  background: rgba(15, 23, 42, 0.6);
  color: var(--text-muted);
  transition: all 0.2s ease;
}

.radio-pill-label:hover span {
  border-color: rgba(255, 255, 255, 0.25);
  color: #ffffff;
}

.radio-pill-label input:checked + span {
  background: rgba(99, 102, 241, 0.25);
  border-color: var(--accent-indigo);
  color: #ffffff;
  font-weight: 700;
}

.custom-test-estimate-banner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(59, 130, 246, 0.15));
  border: 1px solid rgba(99, 102, 241, 0.35);
  border-radius: 12px;
  padding: 1rem 1.5rem;
  margin-top: 1rem;
}

/* PWA Installation & Offline State */
.btn-install-pwa {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.2), rgba(217, 119, 6, 0.3));
  border: 1px solid var(--accent-gold);
  color: var(--accent-gold);
  padding: 0.5rem 1rem;
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.btn-install-pwa:hover {
  background: var(--accent-gold);
  color: #000;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.4);
}

.offline-toast {
  background: linear-gradient(135deg, #1e293b, #0f172a);
  border-bottom: 2px solid var(--accent-amber);
  color: #f8fafc;
  padding: 0.6rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  font-size: 0.9rem;
  font-weight: 600;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.4);
  position: sticky;
  top: 73px;
  z-index: 99;
  animation: fadeIn 0.3s ease;
}

.offline-toast.online-restored {
  border-bottom-color: var(--accent-green);
}

.pwa-info-banner {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(59, 130, 246, 0.1));
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: 16px;
  padding: 1.25rem 1.5rem;
  margin-top: 1.5rem;
}

.pwa-info-icon {
  font-size: 2.2rem;
  line-height: 1;
}

.pwa-info-content h4 {
  font-family: 'Outfit', sans-serif;
  color: #ffffff;
  font-size: 1.1rem;
  margin-bottom: 0.25rem;
}

.pwa-info-content p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.45;
  margin: 0;
}

.btn-primary-sm {
  background: linear-gradient(135deg, var(--accent-gold), var(--accent-amber));
  color: #000;
  border: none;
  border-radius: 8px;
  padding: 0.5rem 1rem;
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s ease;
}

.btn-primary-sm:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
}

/* Responsiveness */
@media (max-width: 900px) {
  .nav-container { flex-direction: column; gap: 1rem; }
  .hero-card { grid-template-columns: 1fr; text-align: center; }
  .nav-tabs { width: 100%; overflow-x: auto; }
  .results-header { flex-direction: column; text-align: center; }
  .results-chips-row { justify-content: center; }
  .custom-test-config-row { grid-template-columns: 1fr; gap: 1rem; }
  .custom-test-estimate-banner { flex-direction: column; text-align: center; }
  .pwa-info-banner { flex-direction: column; text-align: center; }
}

/* ==========================================
   SISTEMA DE MOTIVACIÓN Y ÁNIMO PARA MARTA
   ========================================== */
.marta-welcome-banner {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.18), rgba(99, 102, 241, 0.18));
  border: 1.5px solid rgba(245, 158, 11, 0.4);
  border-radius: 18px;
  padding: 1.25rem 1.75rem;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
  animation: fadeIn 0.4s ease;
}

.marta-avatar {
  font-size: 2.4rem;
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.25), rgba(217, 119, 6, 0.35));
  border: 1px solid var(--accent-gold);
  border-radius: 50%;
  width: 54px;
  height: 54px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 4px 14px rgba(245, 158, 11, 0.3);
}

.marta-welcome-text h3 {
  font-family: 'Outfit', sans-serif;
  color: #ffffff;
  font-size: 1.25rem;
  margin-bottom: 0.25rem;
}

.marta-welcome-text p {
  color: #cbd5e1;
  font-size: 0.92rem;
  line-height: 1.45;
  margin: 0;
  font-style: italic;
}

.marta-streak-badge {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid rgba(245, 158, 11, 0.4);
  padding: 0.6rem 1.1rem;
  border-radius: 14px;
  flex-shrink: 0;
}

.marta-streak-icon {
  font-size: 1.6rem;
  animation: pulse 1.5s infinite;
}

.marta-streak-num {
  font-family: 'Outfit', sans-serif;
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--accent-gold);
  line-height: 1;
}

.marta-streak-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 700;
}

/* Banner de felicitación dinámico durante el quiz */
.marta-cheer-banner {
  margin-top: 1rem;
  padding: 0.9rem 1.25rem;
  border-radius: 12px;
  font-weight: 700;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  animation: bounceIn 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.marta-cheer-banner.cheer-correct {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.2), rgba(5, 150, 105, 0.25));
  border: 1px solid var(--accent-green);
  color: #6ee7b7;
}

.marta-cheer-banner.cheer-streak {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.25), rgba(217, 119, 6, 0.3));
  border: 1.5px solid var(--accent-gold);
  color: #fde68a;
}

.marta-cheer-banner.cheer-support {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(59, 130, 246, 0.2));
  border: 1px solid var(--accent-indigo);
  color: #c7d2fe;
}

@keyframes bounceIn {
  0% { transform: scale(0.95); opacity: 0; }
  60% { transform: scale(1.02); opacity: 1; }
  100% { transform: scale(1); opacity: 1; }
}

@media (max-width: 900px) {
  .marta-welcome-banner { flex-direction: column; text-align: center; }
}