/* ========================================================
   SIMULADOR OFICIAL DIAN 2026 — GESTOR II (OPEC 236844)
   iOS Cupertino Design System — 100% Fluid & Mobile-First
   ======================================================== */

:root {
  /* Apple iOS Palette */
  --ios-blue: #007aff;
  --ios-blue-light: #e5f1ff;
  --ios-blue-dark: #0056b3;
  
  --ios-green: #34c759;
  --ios-green-bg: #ecfdf3;
  --ios-green-border: #a6f4c5;
  
  --ios-red: #ff3b30;
  --ios-red-bg: #fef3f2;
  --ios-red-border: #fecdca;

  --ios-orange: #ff9500;
  --ios-orange-bg: #fffbeb;
  
  --ios-indigo: #5856d6;
  --ios-indigo-bg: #f4f3ff;
  
  --ios-teal: #30b0c7;

  /* Surfaces */
  --ios-bg-canvas: #f2f2f7;
  --ios-card-bg: #ffffff;
  --ios-card-subtle: #f8f9fa;
  --ios-border-subtle: rgba(0, 0, 0, 0.08);
  --ios-border-focus: rgba(0, 122, 255, 0.4);

  --ios-text-primary: #1c1c1e;
  --ios-text-secondary: #636366;
  --ios-text-tertiary: #8e8e93;

  /* Curves & Elevation */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-pill: 9999px;

  --ios-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --ios-shadow-md: 0 8px 24px rgba(0, 0, 0, 0.06);
  --ios-shadow-lg: 0 16px 36px rgba(0, 0, 0, 0.09);
  --ios-shadow-hover: 0 12px 28px rgba(0, 122, 255, 0.14);

  --font-family: -apple-system, BlinkMacSystemFont, 'Outfit', 'Plus Jakarta Sans', 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --transition-spring: all 0.25s cubic-bezier(0.175, 0.885, 0.32, 1.15);
  --transition-smooth: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Global Reset: Previene Desbordes Horizontales */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
  position: relative;
  -webkit-text-size-adjust: 100%;
}

body.ios-app {
  font-family: var(--font-family);
  background-color: var(--ios-bg-canvas);
  color: var(--ios-text-primary);
  line-height: 1.55;
  min-height: 100vh;
  padding-bottom: 96px; /* Espacio para el dock inferior */
}

/* Contenedor Fluido y Seguro */
.ios-container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 16px;
}

/* ========================================================
   HEADER ULTRA-COMPACTO (No roba pantalla en móvil ni tablet)
   ======================================================== */
.ios-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(25px);
  -webkit-backdrop-filter: blur(25px);
  border-bottom: 1px solid var(--ios-border-subtle);
  height: 48px;
  display: flex;
  align-items: center;
  width: 100%;
  box-sizing: border-box;
  overflow: hidden;
}

.ios-header-content {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  box-sizing: border-box;
  min-width: 0;
}

.ios-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  min-width: 0;
}

.ios-app-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, #007aff, #0056b3);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.05rem;
  box-shadow: 0 2px 8px rgba(0, 122, 255, 0.25);
  flex-shrink: 0;
}

.ios-brand-text {
  min-width: 0;
}

.ios-brand-title {
  font-size: 0.92rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ios-text-primary);
  line-height: 1.1;
  white-space: nowrap;
}

.ios-brand-subtitle {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--ios-text-secondary);
  line-height: 1.1;
  white-space: nowrap;
}

.ios-header-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 149, 0, 0.12);
  color: #b45309;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  font-size: 0.78rem;
  font-weight: 700;
  border: 1px solid rgba(255, 149, 0, 0.22);
  white-space: nowrap;
  flex-shrink: 0;
}

.badge-text-mobile {
  display: none;
}

.ios-badge-dot {
  width: 7px;
  height: 7px;
  background-color: var(--ios-orange);
  border-radius: 50%;
  animation: pulse 1.8s infinite;
  flex-shrink: 0;
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.ios-header-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.ios-circle-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--ios-border-subtle);
  background: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 0.85rem;
  transition: var(--transition-smooth);
  flex-shrink: 0;
}

.ios-circle-btn:hover {
  background: #f2f2f7;
  transform: scale(1.05);
}

/* Tabs System */
.tab-content {
  display: none;
  animation: fadeIn 0.25s ease forwards;
}

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

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ========================================================
   HOME / HUB SECTION ("¿Qué deseas estudiar hoy?")
   ======================================================== */

.ios-welcome-section {
  padding: 16px 0 12px;
  width: 100%;
}

.ios-welcome-header {
  margin-bottom: 16px;
  width: 100%;
}

.ios-greeting {
  font-size: clamp(1.4rem, 4.5vw, 2.1rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--ios-text-primary);
  margin-bottom: 4px;
  word-break: break-word;
}

.ios-greeting-sub {
  font-size: clamp(0.85rem, 2.8vw, 1.02rem);
  color: var(--ios-text-secondary);
  line-height: 1.45;
  word-break: break-word;
}

/* Hero Widget iOS */
.ios-hero-widget {
  background: linear-gradient(135deg, #1c2738 0%, #0f172a 100%);
  color: #ffffff;
  border-radius: var(--radius-lg);
  padding: clamp(16px, 3.5vw, 26px);
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 18px;
  box-shadow: 0 16px 36px rgba(15, 23, 42, 0.15);
  margin-bottom: 24px;
  position: relative;
  overflow: hidden;
  width: 100%;
}

.ios-hero-widget::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -60px;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(0, 122, 255, 0.3) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.ios-hero-left {
  min-width: 0;
}

.ios-countdown-tag {
  font-size: clamp(0.68rem, 2vw, 0.75rem);
  font-weight: 700;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 8px;
  word-break: break-word;
}

.ios-countdown-main {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.ios-days-num {
  font-size: clamp(2.6rem, 7.5vw, 4rem);
  font-weight: 800;
  line-height: 1;
  color: #ffffff;
}

.ios-days-label {
  font-size: clamp(0.78rem, 2.5vw, 0.92rem);
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.35;
  word-break: break-word;
}

.ios-days-label strong {
  color: #38bdf8;
  font-weight: 600;
  display: block;
}

.ios-target-pill {
  display: inline-block;
  max-width: 100%;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.18);
  padding: 6px 12px;
  border-radius: 10px;
  font-size: clamp(0.72rem, 2.2vw, 0.82rem);
  font-weight: 500;
  line-height: 1.35;
  word-break: break-word;
}

.ios-target-pill strong {
  color: #4ade80;
}

.ios-hero-right {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
  width: 100%;
}

.ios-stats-ring-card {
  width: 100%;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  padding: 14px;
  min-width: 0;
}

.ios-stats-kpi {
  text-align: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 10px;
  margin-bottom: 10px;
}

.ios-kpi-value {
  display: block;
  font-size: clamp(1.8rem, 5vw, 2.2rem);
  font-weight: 800;
  color: #34c759;
  line-height: 1.1;
}

.ios-kpi-label {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.6);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.ios-stats-mini-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  text-align: center;
  gap: 4px;
  min-width: 0;
}

.ios-mini-stat {
  min-width: 0;
}

.ios-mini-stat-val {
  display: block;
  font-size: clamp(0.95rem, 2.5vw, 1.15rem);
  font-weight: 700;
}

.ios-mini-stat-lbl {
  font-size: 0.68rem;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.2;
  word-break: normal;
}

.text-primary { color: #38bdf8 !important; }
.text-success { color: #4ade80 !important; }
.text-danger { color: #f87171 !important; }

/* ========================================================
   ESTRATEGIA 15 DÍAS & ROADMAP VISUAL
   ======================================================== */
.ios-strategy-card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  border: 1.5px solid rgba(0, 122, 255, 0.2);
  padding: clamp(16px, 3.5vw, 24px);
  margin-bottom: 24px;
  box-shadow: 0 4px 16px rgba(0, 122, 255, 0.06);
  width: 100%;
}

.ios-strategy-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--ios-border-subtle);
}

.ios-strategy-title-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.ios-strategy-icon {
  font-size: 1.8rem;
  flex-shrink: 0;
}

.ios-strategy-header h3 {
  font-size: clamp(1rem, 3vw, 1.22rem);
  font-weight: 800;
  color: var(--ios-text-primary);
  line-height: 1.2;
}

.ios-strategy-sub {
  font-size: clamp(0.78rem, 2.2vw, 0.86rem);
  color: var(--ios-text-secondary);
}

.ios-roadmap-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  width: 100%;
}

.ios-phase-card {
  background: #f8fafc;
  border: 1px solid var(--ios-border-subtle);
  border-radius: 12px;
  padding: 14px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  cursor: pointer;
  transition: var(--transition-spring);
  min-width: 0;
}

.ios-phase-card:hover {
  transform: translateY(-2px);
  border-color: var(--ios-blue);
  background: #f0f7ff;
  box-shadow: 0 4px 14px rgba(0, 122, 255, 0.1);
}

.ios-phase-badge {
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  padding: 3px 8px;
  border-radius: var(--radius-pill);
  display: inline-block;
  align-self: flex-start;
  margin-bottom: 8px;
  max-width: 100%;
  word-break: break-word;
}

.badge-p1 { background: #fee2e2; color: #dc2626; }
.badge-p2 { background: #e0f2fe; color: #0284c7; }
.badge-p3 { background: #fef3c7; color: #b45309; }
.badge-p4 { background: #ecfdf5; color: #059669; }

.ios-phase-card h4 {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--ios-text-primary);
  margin-bottom: 4px;
}

.ios-phase-card p {
  font-size: 0.8rem;
  color: var(--ios-text-secondary);
  line-height: 1.38;
  margin-bottom: 10px;
}

.ios-phase-action {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--ios-blue);
}

/* Bento Grid */
.ios-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  width: 100%;
}

.ios-section-header h2 {
  font-size: clamp(1.15rem, 3.5vw, 1.35rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ios-text-primary);
}

.ios-section-tag {
  font-size: 0.78rem;
  font-weight: 600;
  background: var(--ios-card-bg);
  border: 1px solid var(--ios-border-subtle);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  color: var(--ios-text-secondary);
}

.ios-bento-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr));
  gap: 14px;
  margin-bottom: 28px;
  width: 100%;
}

.ios-card {
  background: var(--ios-card-bg);
  border: 1px solid var(--ios-border-subtle);
  border-radius: var(--radius-lg);
  padding: clamp(16px, 3vw, 20px);
  box-shadow: var(--ios-shadow-sm);
  display: flex;
  flex-direction: column;
  cursor: pointer;
  transition: var(--transition-spring);
  min-width: 0;
}

.ios-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--ios-shadow-hover);
  border-color: rgba(0, 122, 255, 0.3);
}

.ios-card:active {
  transform: scale(0.98);
}

.ios-card-featured {
  grid-column: span 2;
  background: linear-gradient(135deg, #ffffff 0%, #f0f7ff 100%);
  border: 1.5px solid rgba(0, 122, 255, 0.25);
}

.ios-card-badge-urgent {
  display: inline-block;
  align-self: flex-start;
  background: linear-gradient(135deg, #ff3b30, #e11d48);
  color: #ffffff;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 3px 8px;
  border-radius: var(--radius-pill);
  margin-bottom: 10px;
}

.ios-card-badge {
  display: inline-block;
  align-self: flex-start;
  background: #f2f2f7;
  color: var(--ios-text-secondary);
  font-size: 0.7rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: var(--radius-pill);
  margin-bottom: 10px;
}

.ios-card-icon-large {
  font-size: 2rem;
  margin-bottom: 6px;
}

.ios-card-icon {
  font-size: 1.6rem;
  margin-bottom: 6px;
}

.ios-card h3 {
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ios-text-primary);
  margin-bottom: 6px;
  line-height: 1.3;
}

.ios-card p {
  font-size: 0.85rem;
  color: var(--ios-text-secondary);
  line-height: 1.45;
  margin-bottom: 14px;
  flex-grow: 1;
}

.ios-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 10px;
  border-top: 1px solid var(--ios-border-subtle);
}

.ios-card-count {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ios-text-tertiary);
}

.ios-btn-pill {
  background: #f2f2f7;
  color: var(--ios-blue);
  border: none;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: var(--transition-smooth);
}

.ios-card:hover .ios-btn-pill {
  background: var(--ios-blue);
  color: #ffffff;
}

.btn-primary-pill {
  background: var(--ios-blue) !important;
  color: #ffffff !important;
}

/* ========================================================
   PRACTICE MODE & CASOS (TOTALMENTE FLUIDO)
   ======================================================== */

.ios-filter-section {
  padding: 12px 0 16px;
  width: 100%;
}

.ios-filter-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  width: 100%;
}

.ios-filter-dropdown-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-grow: 1;
  max-width: 600px;
  width: 100%;
}

.ios-filter-label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--ios-text-secondary);
  white-space: nowrap;
}

.ios-select {
  width: 100%;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  border: 1.5px solid #cbd5e1;
  background: #ffffff;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ios-text-primary);
  outline: none;
  cursor: pointer;
  box-shadow: var(--ios-shadow-sm);
  transition: var(--transition-smooth);
}

.ios-select:focus {
  border-color: var(--ios-blue);
  box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.2);
}

.ios-filter-stats {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.ios-badge-pill {
  background: rgba(0, 122, 255, 0.1);
  color: var(--ios-blue);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
}

.ios-badge-pill-secondary {
  background: #ffffff;
  border: 1px solid var(--ios-border-subtle);
  color: var(--ios-text-secondary);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
}

/* Question Wrapper */
.ios-question-wrapper {
  margin-bottom: 20px;
  width: 100%;
}

.ios-question-card {
  background: var(--ios-card-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--ios-border-subtle);
  box-shadow: var(--ios-shadow-md);
  padding: clamp(16px, 3.5vw, 26px);
  width: 100%;
}

.ios-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  flex-wrap: wrap;
  gap: 6px;
}

.ios-badges-row {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.badge-tag-cat {
  background: var(--ios-blue-light);
  color: var(--ios-blue-dark);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: var(--radius-pill);
}

.badge-tag-weight {
  background: #f2f2f7;
  color: var(--ios-text-secondary);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: var(--radius-pill);
}

.badge-tag-opec {
  background: #fef3c7;
  color: #b45309;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: var(--radius-pill);
}

.ios-source-label {
  font-size: 0.75rem;
  color: var(--ios-text-tertiary);
}

/* CASO / SITUACIÓN DESTACADA */
.ios-context-card {
  background: linear-gradient(135deg, #f8faff 0%, #f0f5ff 100%);
  border: 1.5px solid #c7d9fe;
  border-left: 5px solid var(--ios-blue);
  border-radius: 12px;
  padding: clamp(12px, 2.5vw, 18px);
  margin-bottom: 18px;
  box-shadow: 0 4px 12px rgba(0, 122, 255, 0.05);
  width: 100%;
}

.ios-context-header {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 6px;
}

.ios-context-icon {
  font-size: 1.1rem;
}

.ios-context-title {
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: var(--ios-blue);
  text-transform: uppercase;
}

.ios-context-body {
  font-size: clamp(0.9rem, 2.5vw, 0.98rem);
  line-height: 1.6;
  color: #1e293b;
  white-space: pre-line;
  word-break: break-word;
}

/* Question Prompt */
.ios-question-prompt {
  font-size: clamp(1rem, 3vw, 1.15rem);
  font-weight: 700;
  line-height: 1.5;
  color: var(--ios-text-primary);
  margin-bottom: 20px;
  word-break: break-word;
}

/* Opciones de Respuesta Táctiles */
.ios-options-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
  width: 100%;
}

.ios-option-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  background: #ffffff;
  border: 1.5px solid #cbd5e1;
  border-radius: 14px;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.03);
  transition: var(--transition-spring);
  user-select: none;
  min-height: 52px;
  width: 100%;
}

.ios-option-item:hover:not(.disabled) {
  border-color: var(--ios-blue);
  background: #f0f7ff;
  box-shadow: 0 6px 16px rgba(0, 122, 255, 0.12);
  transform: translateY(-2px);
}

.ios-option-item:active:not(.disabled) {
  transform: scale(0.985);
}

.ios-option-letter {
  flex-shrink: 0;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: linear-gradient(135deg, #f8fafc, #e2e8f0);
  border: 1.5px solid #cbd5e1;
  color: #0f172a;
  font-size: 0.92rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-smooth);
}

.ios-option-text {
  font-size: clamp(0.9rem, 2.5vw, 0.98rem);
  line-height: 1.48;
  color: #1e293b;
  padding-top: 4px;
  flex-grow: 1;
  word-break: break-word;
}

/* Estados Acierto / Error */
.ios-option-item.correct {
  background: #ecfdf5 !important;
  border: 2px solid #10b981 !important;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.18);
}

.ios-option-item.correct .ios-option-letter {
  background: #10b981 !important;
  border-color: #10b981 !important;
  color: #ffffff !important;
}

.ios-option-item.wrong {
  background: #fef2f2 !important;
  border: 2px solid #ef4444 !important;
  box-shadow: 0 4px 14px rgba(239, 68, 68, 0.15);
}

.ios-option-item.wrong .ios-option-letter {
  background: #ef4444 !important;
  border-color: #ef4444 !important;
  color: #ffffff !important;
}

.ios-option-item.disabled {
  cursor: default;
}

/* Hoja de Retroalimentación */
.ios-justification-sheet {
  background: #f8fafc;
  border: 1px solid var(--ios-border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  animation: slideUp 0.25s ease forwards;
  width: 100%;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.ios-justification-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
  gap: 8px;
  flex-wrap: wrap;
}

.ios-feedback-badge-success {
  font-size: 0.92rem;
  font-weight: 700;
  color: #15803d;
}

.ios-feedback-badge-wrong {
  font-size: 0.92rem;
  font-weight: 700;
  color: #b91c1c;
}

.ios-correct-answer-pill {
  font-size: 0.78rem;
  font-weight: 700;
  background: #e2e8f0;
  padding: 3px 8px;
  border-radius: var(--radius-pill);
  color: #334155;
}

.ios-justification-body {
  font-size: 0.88rem;
  color: #334155;
  line-height: 1.52;
  word-break: break-word;
}

/* Action Bar */
.ios-action-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 16px;
  width: 100%;
}

.ios-action-left, .ios-action-right {
  display: flex;
  align-items: center;
  gap: 6px;
}

.ios-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition-smooth);
}

.ios-btn:active {
  transform: scale(0.97);
}

.ios-btn-primary {
  background: linear-gradient(135deg, #007aff, #0056b3);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(0, 122, 255, 0.3);
}

.ios-btn-primary:hover {
  background: var(--ios-blue-dark);
}

.ios-btn-secondary {
  background: #ffffff;
  border: 1.5px solid #cbd5e1;
  color: var(--ios-text-primary);
  box-shadow: 0 2px 5px rgba(0,0,0,0.03);
}

.ios-btn-secondary:hover {
  background: #f2f2f7;
}

.ios-btn-outline {
  background: #ffffff;
  border: 1.5px solid #cbd5e1;
  color: var(--ios-text-secondary);
}

.ios-btn-outline.active {
  background: #fef3c7;
  border-color: #f59e0b;
  color: #b45309;
}

.ios-jump-widget {
  display: flex;
  align-items: center;
  gap: 6px;
  background: #ffffff;
  border: 1.5px solid #cbd5e1;
  padding: 4px 8px;
  border-radius: var(--radius-md);
}

.ios-jump-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ios-text-secondary);
}

.ios-jump-input {
  width: 50px;
  border: none;
  outline: none;
  font-size: 0.9rem;
  font-weight: 700;
  text-align: center;
}

.ios-btn-sm {
  background: var(--ios-blue);
  color: #ffffff;
  border: none;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 5px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.ios-keyboard-hints {
  text-align: center;
  font-size: 0.78rem;
  color: var(--ios-text-tertiary);
  margin-top: 6px;
}

/* ========================================================
   EXAM MODE (SIMULACRO OFICIAL)
   ======================================================== */
.ios-exam-card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--ios-border-subtle);
  padding: clamp(20px, 4vw, 36px);
  max-width: 760px;
  margin: 20px auto;
  box-shadow: var(--ios-shadow-md);
  text-align: center;
  width: 100%;
}

.ios-exam-icon {
  font-size: 2.8rem;
  margin-bottom: 8px;
}

.ios-exam-header h2 {
  font-size: clamp(1.25rem, 3.5vw, 1.6rem);
  font-weight: 800;
  margin-bottom: 6px;
}

.ios-exam-header p {
  color: var(--ios-text-secondary);
  font-size: 0.9rem;
  margin-bottom: 20px;
}

.ios-exam-config-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  text-align: left;
  margin-bottom: 20px;
}

.ios-weights-summary {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 6px;
}

.ios-weight-tag {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: var(--radius-pill);
}

.bg-blue { background: #e0f2fe; color: #0369a1; }
.bg-teal { background: #ccfbf1; color: #0f766e; }
.bg-indigo { background: #e0e7ff; color: #4338ca; }

.ios-exam-rules {
  background: #f8fafc;
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: left;
  margin-bottom: 24px;
  font-size: 0.85rem;
}

.ios-exam-rules h4 {
  margin-bottom: 6px;
  color: var(--ios-text-primary);
}

.ios-exam-rules ul {
  padding-left: 18px;
  color: var(--ios-text-secondary);
  line-height: 1.5;
}

.ios-btn-large-primary {
  width: 100%;
  padding: 13px 24px;
  background: linear-gradient(135deg, #007aff, #0056b3);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 6px 18px rgba(0, 122, 255, 0.3);
  transition: var(--transition-smooth);
}

.ios-btn-large-primary:hover {
  background: var(--ios-blue-dark);
}

/* Exam Active Area */
.ios-exam-active-card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--ios-border-subtle);
  padding: clamp(16px, 3vw, 24px);
  box-shadow: var(--ios-shadow-md);
  width: 100%;
}

.ios-exam-hud {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--ios-border-subtle);
  padding-bottom: 14px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.ios-exam-progress-wrap {
  flex-grow: 1;
  min-width: 160px;
}

.ios-exam-step-info {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ios-text-secondary);
  margin-bottom: 4px;
}

.ios-exam-progress-bar {
  width: 100%;
  height: 7px;
  background: #f2f2f7;
  border-radius: var(--radius-pill);
  overflow: hidden;
}

.ios-exam-progress-fill {
  height: 100%;
  background: var(--ios-blue);
  border-radius: var(--radius-pill);
  transition: width 0.3s ease;
}

.ios-exam-timer-card {
  display: flex;
  align-items: center;
  gap: 6px;
  background: #f2f2f7;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--ios-blue);
}

.ios-btn-sm-danger {
  background: rgba(255, 59, 48, 0.1);
  color: var(--ios-red);
  border: 1px solid rgba(255, 59, 48, 0.2);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 6px 12px;
  border-radius: var(--radius-md);
  cursor: pointer;
}

.ios-exam-nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 20px;
  padding-top: 14px;
  border-top: 1px solid var(--ios-border-subtle);
  gap: 10px;
}

/* ========================================================
   FLASHCARDS & GLOSARIO
   ======================================================== */
.ios-flashcards-header, .ios-glossary-header, .ios-bookmarks-header {
  padding: 16px 0 12px;
}

.ios-flashcards-header h2, .ios-glossary-header h2, .ios-bookmarks-header h2 {
  font-size: clamp(1.2rem, 3.5vw, 1.55rem);
  font-weight: 800;
  margin-bottom: 4px;
}

.ios-flashcards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr));
  gap: 14px;
  margin-bottom: 28px;
  width: 100%;
}

/* 3D Flip Flashcards */
.ios-flashcard {
  perspective: 1000px;
  height: 220px;
  cursor: pointer;
  width: 100%;
}

.ios-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;
  border-radius: var(--radius-lg);
  box-shadow: var(--ios-shadow-sm);
}

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

.ios-flashcard-front, .ios-flashcard-back {
  position: absolute;
  width: 100%;
  height: 100%;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border: 1px solid var(--ios-border-subtle);
}

.ios-flashcard-front {
  background: #ffffff;
  color: var(--ios-text-primary);
}

.ios-flashcard-tag {
  align-self: flex-start;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  background: var(--ios-blue-light);
  color: var(--ios-blue);
  padding: 3px 8px;
  border-radius: var(--radius-pill);
}

.ios-flashcard-q {
  font-size: 0.98rem;
  font-weight: 700;
  line-height: 1.45;
  margin: auto 0;
}

.ios-flashcard-hint {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--ios-blue);
}

.ios-flashcard-back {
  background: linear-gradient(135deg, #007aff, #0056b3);
  color: #ffffff;
  transform: rotateY(180deg);
}

.ios-flashcard-ans {
  font-size: 1.35rem;
  font-weight: 800;
  color: #ffffff;
  margin-top: 6px;
}

.ios-flashcard-detail {
  font-size: 0.82rem;
  line-height: 1.42;
  color: rgba(255, 255, 255, 0.9);
  margin: auto 0;
}

.ios-flashcard-back .ios-flashcard-hint {
  color: rgba(255, 255, 255, 0.75);
}

/* Glossary Card */
.ios-search-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #ffffff;
  border: 1.5px solid #cbd5e1;
  border-radius: var(--radius-md);
  padding: 8px 14px;
  margin-top: 12px;
  width: 100%;
}

.ios-search-bar input {
  width: 100%;
  border: none;
  outline: none;
  font-size: 0.92rem;
  font-family: inherit;
}

.ios-glossary-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 28px;
  margin-top: 14px;
  width: 100%;
}

.ios-glossary-card {
  background: #ffffff;
  border-radius: var(--radius-md);
  border: 1px solid var(--ios-border-subtle);
  padding: 16px 18px;
  box-shadow: var(--ios-shadow-sm);
  transition: var(--transition-smooth);
  width: 100%;
}

.ios-glossary-term-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
  gap: 8px;
  flex-wrap: wrap;
}

.ios-glossary-term {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--ios-blue);
}

.ios-glossary-source {
  font-size: 0.75rem;
  font-weight: 600;
  background: #f2f2f7;
  color: var(--ios-text-secondary);
  padding: 2px 8px;
  border-radius: var(--radius-pill);
}

.ios-glossary-def {
  font-size: 0.9rem;
  color: var(--ios-text-primary);
  line-height: 1.52;
  word-break: break-word;
}

/* ========================================================
   MODAL SHEET (ESTRATEGIA & GUÍA DE ESTUDIO)
   ======================================================== */
.ios-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 2000;
  display: none;
  align-items: flex-end;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.25s ease;
}

.ios-modal-backdrop.active {
  display: flex !important;
  opacity: 1 !important;
}

.ios-modal-sheet {
  background: #ffffff;
  width: 100%;
  max-width: 780px;
  max-height: 88vh;
  border-top-left-radius: 24px;
  border-top-right-radius: 24px;
  box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.2);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: slideSheetUp 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes slideSheetUp {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}

.ios-modal-header {
  padding: 14px 20px 10px;
  border-bottom: 1px solid var(--ios-border-subtle);
  position: relative;
}

.ios-modal-handle {
  width: 40px;
  height: 5px;
  background: #cbd5e1;
  border-radius: var(--radius-pill);
  margin: 0 auto 10px;
}

.ios-modal-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.ios-modal-title {
  font-size: clamp(1rem, 3vw, 1.15rem);
  font-weight: 800;
  color: var(--ios-text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.ios-modal-close {
  background: #f1f5f9;
  border: none;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 700;
  color: #64748b;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ios-modal-body {
  padding: 18px 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.ios-guide-block {
  background: #f8fafc;
  border: 1px solid var(--ios-border-subtle);
  border-radius: 14px;
  padding: 16px;
}

.ios-guide-block h4 {
  font-size: 1rem;
  font-weight: 800;
  margin-bottom: 6px;
  color: var(--ios-text-primary);
}

.ios-guide-block p, .ios-guide-block li {
  font-size: 0.88rem;
  color: #334155;
  line-height: 1.5;
  word-break: break-word;
}

.ios-guide-block ol, .ios-guide-block ul {
  padding-left: 18px;
  margin-top: 6px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.ios-guide-block.highlight-blue {
  background: #f0f7ff;
  border-color: #bfdbfe;
  border-left: 5px solid var(--ios-blue);
}

.ios-guide-block.highlight-gold {
  background: #fefce8;
  border-color: #fef08a;
  border-left: 5px solid #eab308;
}

.ios-guide-block.highlight-green {
  background: #f0fdf4;
  border-color: #bbf7d0;
  border-left: 5px solid #22c55e;
}

.ios-guide-tag {
  display: inline-block;
  margin-top: 8px;
  background: rgba(0, 122, 255, 0.12);
  color: var(--ios-blue);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: var(--radius-pill);
}

.ios-guide-numbers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 8px;
  margin-top: 10px;
}

.ios-num-item {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
}

.ios-num-item strong {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--ios-blue);
}

.ios-num-item span {
  font-size: 0.75rem;
  color: #64748b;
  line-height: 1.25;
}

.ios-modal-footer {
  padding: 14px 20px;
  border-top: 1px solid var(--ios-border-subtle);
  background: #ffffff;
}

/* ========================================================
   FLOATING DOCK (iOS TAB BAR DOCK — 100% Grid Fluid)
   ======================================================== */
.ios-dock-bar {
  position: fixed;
  bottom: max(10px, env(safe-area-inset-bottom));
  left: 0;
  right: 0;
  display: flex;
  justify-content: center;
  z-index: 1000;
  pointer-events: none;
  padding: 0 10px;
  width: 100%;
  box-sizing: border-box;
}

.ios-dock-inner {
  pointer-events: auto;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(25px);
  -webkit-backdrop-filter: blur(25px);
  border: 1px solid rgba(255, 255, 255, 0.65);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12), 0 2px 6px rgba(0, 0, 0, 0.04);
  border-radius: 24px;
  padding: 4px 6px;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  width: 100%;
  max-width: 500px;
  gap: 3px;
  box-sizing: border-box;
}

.ios-dock-tab {
  background: transparent;
  border: none;
  padding: 6px 2px;
  border-radius: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  cursor: pointer;
  transition: var(--transition-smooth);
  position: relative;
  user-select: none;
  min-width: 0;
  width: 100%;
  box-sizing: border-box;
}

.ios-dock-tab:hover {
  background: rgba(0, 0, 0, 0.04);
}

.ios-dock-tab.active {
  background: rgba(0, 122, 255, 0.12);
}

.ios-dock-icon {
  font-size: 1.15rem;
  line-height: 1;
  transition: transform 0.2s ease;
}

.ios-dock-tab.active .ios-dock-icon {
  transform: translateY(-2px);
}

.ios-dock-label {
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--ios-text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
  text-align: center;
}

.ios-dock-tab.active .ios-dock-label {
  color: var(--ios-blue);
  font-weight: 700;
}

.ios-dock-counter {
  position: absolute;
  top: 2px;
  right: 4px;
  background: var(--ios-red);
  color: #ffffff;
  font-size: 0.6rem;
  font-weight: 800;
  padding: 1px 4px;
  border-radius: var(--radius-pill);
  line-height: 1.1;
}

/* ========================================================
   RESPONSIVE BREAKPOINTS (CELULARES Y TABLETS SIN DESBORDES)
   ======================================================== */

/* Tablets / Pantallas medianas (<= 900px) */
@media (max-width: 900px) {
  .ios-hero-widget {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .ios-card-featured {
    grid-column: span 1;
  }
  .ios-roadmap-grid {
    grid-template-columns: repeat(2, 1fr) !important;
  }
}

/* Móviles y Tablets verticales (<= 768px) */
@media (max-width: 768px) {
  .ios-container {
    padding: 0 12px;
  }

  /* Header ultra-limpio en móvil: Brand a la izq, botones a la der, 0 desborde */
  .ios-header {
    height: 46px;
  }
  .ios-header-content {
    padding: 0 12px;
    gap: 8px;
  }
  .ios-brand-subtitle {
    display: none !important;
  }
  .ios-header-badge {
    display: none !important; /* Libera el 100% de espacio horizontal en móvil */
  }
  .ios-header-actions {
    gap: 6px;
  }
  .ios-circle-btn {
    width: 32px;
    height: 32px;
    font-size: 0.85rem;
  }

  /* Hero Countdown & KPIs Widget */
  .ios-hero-widget {
    grid-template-columns: 1fr !important;
    padding: 16px 14px;
    margin-bottom: 20px;
    gap: 16px;
  }
  .ios-countdown-tag {
    font-size: 0.72rem;
  }
  .ios-countdown-main {
    gap: 10px;
    margin-bottom: 10px;
  }
  .ios-days-num {
    font-size: 2.8rem;
  }
  .ios-days-label {
    font-size: 0.82rem;
  }
  .ios-target-pill {
    font-size: 0.75rem;
    padding: 6px 10px;
    width: 100%;
    box-sizing: border-box;
  }
  .ios-stats-ring-card {
    padding: 12px 10px;
  }

  /* Strategy Card: título y botón apilados para toque fácil */
  .ios-strategy-card {
    padding: 16px 14px;
    margin-bottom: 20px;
  }
  .ios-strategy-header {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }
  .ios-strategy-header .ios-btn-pill {
    width: 100%;
    justify-content: center;
    text-align: center;
    padding: 10px 14px;
    font-size: 0.88rem;
  }

  /* Roadmap y Bento en 1 sola columna fluida */
  .ios-roadmap-grid {
    grid-template-columns: 1fr !important;
    gap: 10px;
  }
  .ios-bento-grid {
    grid-template-columns: 1fr !important;
    gap: 12px;
  }

  /* Preguntas y Opciones Táctiles */
  .ios-question-card {
    padding: 16px 12px;
    border-radius: 16px;
  }
  .ios-context-card {
    padding: 12px 12px;
    border-radius: 12px;
  }
  .ios-option-item {
    padding: 12px 12px;
    gap: 10px;
    min-height: 50px;
  }
  .ios-option-letter {
    width: 32px;
    height: 32px;
    font-size: 0.85rem;
  }
  .ios-option-text {
    font-size: 0.92rem;
  }

  /* Barra de acciones apilada en móvil */
  .ios-action-bar {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }
  .ios-action-left, .ios-action-right {
    width: 100%;
    display: flex;
    gap: 6px;
  }
  .ios-action-left .ios-btn, .ios-action-right .ios-btn {
    flex: 1;
    justify-content: center;
    padding: 11px 8px;
    font-size: 0.86rem;
  }
  .ios-jump-widget {
    width: 100%;
    justify-content: center;
    padding: 6px;
  }

  /* Filtros en práctica */
  .ios-filter-row {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }
  .ios-filter-dropdown-wrap {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    width: 100%;
    max-width: 100%;
  }
  .ios-filter-stats {
    width: 100%;
    justify-content: space-between;
  }

  /* Modal Sheet en celular */
  .ios-modal-sheet {
    max-height: 92vh;
    border-top-left-radius: 20px;
    border-top-right-radius: 20px;
  }
  .ios-modal-body {
    padding: 14px 14px;
    gap: 12px;
  }
}

/* Pantallas ultra-estrechas (iPhone SE / 320px - 380px) */
@media (max-width: 380px) {
  .ios-dock-tab {
    padding: 5px 1px;
  }
  .ios-dock-label {
    font-size: 0.58rem;
  }
  .ios-dock-icon {
    font-size: 1.05rem;
  }
  .ios-brand-title {
    font-size: 0.88rem;
  }
  .ios-days-num {
    font-size: 2.4rem;
  }
  .ios-kpi-value {
    font-size: 1.5rem;
  }
  .ios-circle-btn {
    width: 30px;
    height: 30px;
    font-size: 0.8rem;
  }
}

/* ========================================================
   ESTILOS DE IMPRESIÓN / EXPORTACIÓN A PDF
   ======================================================== */
@media print {
  .ios-header,
  .ios-dock-bar,
  .ios-action-bar,
  .ios-circle-btn,
  .ios-modal-backdrop,
  #btnStrategy,
  #btnAudioToggle,
  #btnResetStats {
    display: none !important;
  }

  body.ios-app {
    background: #ffffff !important;
    color: #000000 !important;
    padding-bottom: 0 !important;
  }

  .ios-container {
    max-width: 100% !important;
    padding: 0 !important;
  }

  .ios-exam-card {
    border: none !important;
    box-shadow: none !important;
    padding: 0 !important;
    margin: 0 !important;
  }
}