:root {
  --bg-primary: #0b1120;
  --bg-surface: #1e293b;
  --bg-card: #273549;
  --bg-card-hover: #334155;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-gold: #f59e0b;
  --accent-blue: #38bdf8;
  --accent-indigo: #6366f1;
  --accent-green: #10b981;
  --accent-red: #ef4444;
  --accent-purple: #a855f7;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-active: rgba(56, 189, 248, 0.4);
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 6px 12px -2px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 14px 28px -5px rgba(0, 0, 0, 0.6);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-width: 360px;
  max-width: 100vw;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  font-size: 14px;
}

/* Encabezado */
.header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 25;
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, #f59e0b, #38bdf8);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 15px;
  color: #0b1120;
  box-shadow: 0 2px 8px rgba(245, 158, 11, 0.3);
}

.brand-title {
  font-size: 17px;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.1;
  letter-spacing: -0.2px;
}

.brand-subtitle {
  font-size: 12px;
  color: var(--accent-blue);
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.5px;
}

/* Widget Pomodoro en el encabezado */
.pomodoro-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  background-color: rgba(239, 68, 68, 0.14);
  border: 1px solid rgba(239, 68, 68, 0.4);
  padding: 6px 12px;
  border-radius: 20px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.pomodoro-pill:hover {
  background-color: rgba(239, 68, 68, 0.25);
}

.pomodoro-pill.break-mode {
  background-color: rgba(16, 185, 129, 0.18);
  border-color: rgba(16, 185, 129, 0.45);
}

.pomodoro-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-red);
  box-shadow: 0 0 6px var(--accent-red);
}

.pomodoro-pill.break-mode .pomodoro-dot {
  background-color: var(--accent-green);
  box-shadow: 0 0 6px var(--accent-green);
}

.pomodoro-time {
  font-size: 14px;
  font-weight: 800;
  color: #fca5a5;
  font-family: monospace;
}

.pomodoro-pill.break-mode .pomodoro-time {
  color: #6ee7b7;
}

/* Barra de Filtro de Ejes Temáticos */
.filter-bar-container {
  display: flex;
  align-items: center;
  gap: 10px;
  background-color: rgba(30, 41, 59, 0.9);
  border-bottom: 1px solid var(--border-color);
  padding: 10px 18px;
}

.filter-eje-select {
  flex: 1;
  background-color: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 13px;
  font-weight: 600;
  outline: none;
  cursor: pointer;
  transition: border-color 0.2s ease;
}

.filter-eje-select:focus {
  border-color: var(--accent-blue);
}

/* Pestañas de navegación */
.tabs-nav {
  display: flex;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  padding: 4px 10px 0;
  gap: 4px;
}

.tab-btn {
  flex: 1;
  background: transparent;
  border: none;
  padding: 11px 4px;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-secondary);
  border-bottom: 3px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
}

.tab-btn:hover {
  color: var(--text-primary);
}

.tab-btn.active {
  color: var(--accent-blue);
  border-bottom-color: var(--accent-blue);
}

/* Contenido Principal */
.main-container {
  padding: 16px 18px 28px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Tarjeta de Pregunta PJS */
.question-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.tags-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.badge {
  font-size: 12px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 6px;
  text-transform: uppercase;
}

.badge-level {
  background-color: rgba(245, 158, 11, 0.18);
  color: var(--accent-gold);
  border: 1px solid rgba(245, 158, 11, 0.4);
}

.badge-type {
  background-color: rgba(56, 189, 248, 0.18);
  color: var(--accent-blue);
  border: 1px solid rgba(56, 189, 248, 0.4);
}

.badge-topic {
  background-color: rgba(148, 163, 184, 0.16);
  color: #e2e8f0;
}

/* Sección de Caso Situacional (Letra grande y lectura descansada) */
.case-box {
  background-color: rgba(11, 17, 32, 0.9);
  border-left: 4px solid var(--accent-gold);
  border-radius: 6px;
  padding: 14px 16px;
}

.case-heading {
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--accent-gold);
  margin-bottom: 8px;
  letter-spacing: 0.5px;
}

.case-text {
  font-size: 15px;
  line-height: 1.65;
  color: #f1f5f9;
}

/* Enunciado */
.question-enunciado {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.55;
  padding: 2px 0;
}

/* Opciones de Respuesta */
.options-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.option-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 14px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
}

.option-item:hover {
  background-color: var(--bg-card-hover);
  border-color: rgba(56, 189, 248, 0.5);
  transform: translateY(-1px);
}

.option-item.selected {
  background-color: rgba(56, 189, 248, 0.18);
  border-color: var(--accent-blue);
}

.option-key {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 13px;
  flex-shrink: 0;
  transition: all 0.2s ease;
}

.option-item.selected .option-key {
  background-color: var(--accent-blue);
  color: #0b1120;
  border-color: var(--accent-blue);
}

.option-text {
  font-size: 14px;
  color: var(--text-primary);
  line-height: 1.55;
}

/* Botones de acción */
.actions-row {
  display: flex;
  gap: 10px;
  margin-top: 6px;
}

.btn-primary {
  flex: 1;
  background: linear-gradient(135deg, #0284c7, #2563eb);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 13px 16px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(2, 132, 199, 0.3);
  transition: all 0.2s ease;
}

.btn-primary:hover:not(:disabled) {
  opacity: 0.95;
  transform: translateY(-1px);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  box-shadow: none;
}

.btn-secondary {
  background-color: var(--bg-card);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 13px 16px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-secondary:hover {
  color: var(--text-primary);
  background-color: var(--bg-card-hover);
}

/* Modal Feedback */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(11, 17, 32, 0.9);
  backdrop-filter: blur(5px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 18px;
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  width: 100%;
  max-width: 480px;
  max-height: 88vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  transform: translateY(15px);
  transition: transform 0.25s ease;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.modal-overlay.active .modal-card {
  transform: translateY(0);
}

.verdict-icon {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

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

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

.verdict-title {
  font-size: 17px;
  font-weight: 800;
}

.verdict-title.correct {
  color: var(--accent-green);
}

.verdict-title.incorrect {
  color: var(--accent-red);
}

.norm-box {
  background-color: rgba(99, 102, 241, 0.16);
  border-left: 4px solid var(--accent-indigo);
  padding: 14px 16px;
  border-radius: 6px;
  font-size: 15px;
  color: #e0e7ff;
  line-height: 1.6;
}

.breakdown-item {
  background-color: rgba(11, 17, 32, 0.7);
  padding: 14px 16px;
  border-radius: 6px;
  font-size: 15px;
  line-height: 1.6;
  border-left: 4px solid var(--border-color);
}

.breakdown-item.correct {
  border-left-color: var(--accent-green);
}

.breakdown-item.incorrect {
  border-left-color: var(--accent-red);
}

.srs-buttons {
  display: flex;
  gap: 10px;
}

.srs-btn {
  flex: 1;
  padding: 12px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
}

.srs-btn:hover {
  background-color: var(--bg-card-hover);
}

/* Tarjetas Flashcards SRS */
.srs-card-container {
  background: linear-gradient(145deg, #1e293b, #151e2d);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: var(--shadow-sm);
}

.feynman-box {
  background-color: rgba(11, 17, 32, 0.75);
  border: 1px dashed rgba(245, 158, 11, 0.5);
  border-radius: 8px;
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.feynman-textarea {
  background: transparent;
  border: none;
  outline: none;
  color: #fde68a;
  font-size: 13px;
  line-height: 1.5;
  resize: vertical;
  min-height: 55px;
}

/* Dashboard Cockpit Rediseñado */
.metrics-dashboard {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.cockpit-hero {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.22), rgba(16, 185, 129, 0.18));
  border: 1px solid rgba(56, 189, 248, 0.35);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.cockpit-score-circle {
  width: 82px;
  height: 82px;
  border-radius: 50%;
  background: conic-gradient(var(--accent-green) calc(var(--score-pct, 0) * 1%), rgba(255,255,255,0.08) 0);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 16px rgba(16, 185, 129, 0.35);
  position: relative;
}

.cockpit-score-inner {
  width: 66px;
  height: 66px;
  border-radius: 50%;
  background-color: #0b1120;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.cockpit-score-val {
  font-size: 18px;
  font-weight: 900;
  color: var(--text-primary);
  line-height: 1;
}

.cockpit-score-lbl {
  font-size: 11px;
  color: var(--text-secondary);
}

.calculator-card {
  background-color: var(--bg-surface);
  border: 1px solid rgba(245, 158, 11, 0.35);
  border-radius: var(--radius-md);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.calc-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.calc-label-row {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
}

.calc-slider {
  -webkit-appearance: none;
  width: 100%;
  height: 8px;
  border-radius: 4px;
  background: #334155;
  outline: none;
}

.calc-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent-blue);
  cursor: pointer;
  box-shadow: 0 0 8px rgba(56, 189, 248, 0.7);
}

.pass-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 14px;
  font-size: 12px;
  font-weight: 800;
}

.pass-badge.approved {
  background-color: rgba(16, 185, 129, 0.22);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.5);
}

.pass-badge.failed {
  background-color: rgba(239, 68, 68, 0.22);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.5);
}

.eje-stat-row {
  background-color: var(--bg-card);
  padding: 10px 12px;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  border: 1px solid var(--border-color);
}

/* Animaciones de Racha y Celebración */
@keyframes simoFlamePulse {
  0% { transform: scale(1) rotate(-3deg); filter: drop-shadow(0 0 8px rgba(245, 158, 11, 0.7)); }
  50% { transform: scale(1.15) rotate(3deg); filter: drop-shadow(0 0 22px rgba(239, 68, 68, 0.9)); }
  100% { transform: scale(1) rotate(-3deg); filter: drop-shadow(0 0 8px rgba(245, 158, 11, 0.7)); }
}

@keyframes simoBounce {
  0% { transform: scale(0.9); opacity: 0; }
  60% { transform: scale(1.05); opacity: 1; }
  100% { transform: scale(1); }
}

.streak-badge-active {
  animation: simoBounce 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}