@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;600;700;800&family=DM+Sans:ital,wght@0,300;0,400;0,500;0,600;1,400&family=JetBrains+Mono:wght@400;500&display=swap');

/* ═══════════════════════════════════════
   ROOT VARIABLES
═══════════════════════════════════════ */
:root {
  --navy:    #003087;
  --blue:    #0057D9;
  --blue-lt: #1a6ef0;
  --blue-xs: #e8f0fe;
  --accent:  #0041b8;

  --surface:  #f8fafc;
  --surface2: #f0f4ff;
  --white:    #ffffff;

  --text:     #0f172a;
  --text-2:   #334155;
  --text-3:   #64748b;
  --border:   #e2e8f0;

  --s-sm: 0 1px 4px rgba(0,0,0,.05);
  --s-md: 0 4px 16px rgba(0,0,0,.07);
  --s-lg: 0 8px 32px rgba(0,0,0,.09);

  --r-card: 14px;
  --r-sm:   8px;
  --r-hero: 20px;

  --sidebar-w: 268px;
  --transition: .22s cubic-bezier(.4,0,.2,1);
}

/* ═══════════════════════════════════════
   RESET
═══════════════════════════════════════ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'DM Sans', sans-serif;
  background: var(--surface);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ═══════════════════════════════════════
   GLOBAL PROGRESS BAR
═══════════════════════════════════════ */
#global-progress {
  position: fixed; top: 0; left: 0; right: 0; height: 3px; z-index: 1000;
  background: linear-gradient(90deg, var(--blue), var(--blue-lt));
  transform-origin: left;
  transition: width .4s ease;
}

/* ═══════════════════════════════════════
   SIDEBAR
═══════════════════════════════════════ */
#sidebar {
  position: fixed; top: 0; left: 0; bottom: 0;
  width: var(--sidebar-w);
  background: var(--white);
  border-right: 1px solid var(--border);
  box-shadow: var(--s-md);
  display: flex; flex-direction: column;
  z-index: 200;
  transition: transform var(--transition);
  overflow: hidden;
}

.sidebar-logo {
  padding: 24px 20px 0;
  display: flex; align-items: center; gap: 12px;
  flex-shrink: 0;
}
.logo-badge {
  width: 40px; height: 40px; border-radius: 10px;
  background: linear-gradient(135deg, var(--navy), var(--blue-lt));
  display: grid; place-items: center;
  font-family: 'Syne', sans-serif; font-weight: 800;
  color: var(--white); font-size: 14px; letter-spacing: .5px;
  flex-shrink: 0;
}
.logo-text { flex: 1; min-width: 0; }
.logo-text strong {
  display: block; font-family: 'Syne', sans-serif;
  font-size: 13px; font-weight: 700; color: var(--text); line-height: 1.2;
}
.logo-text span { font-size: 11px; color: var(--text-3); }

.sidebar-divider { height: 1px; background: var(--border); margin: 16px 0 8px; flex-shrink: 0; }

.sidebar-section-label {
  padding: 0 20px 4px;
  font-size: 10px; font-weight: 600; color: var(--text-3);
  text-transform: uppercase; letter-spacing: 1px;
  flex-shrink: 0;
}

#sidebar-nav {
  flex: 1; overflow-y: auto; padding: 0 10px 12px;
  scrollbar-width: thin; scrollbar-color: var(--border) transparent;
}
#sidebar-nav::-webkit-scrollbar { width: 4px; }
#sidebar-nav::-webkit-scrollbar-track { background: transparent; }
#sidebar-nav::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 10px; border-radius: var(--r-sm);
  cursor: pointer; transition: background var(--transition), color var(--transition);
  margin-bottom: 2px; user-select: none;
}
.nav-item:hover { background: var(--blue-xs); }
.nav-item.active {
  background: linear-gradient(90deg, var(--blue-xs), #dbeafe);
  color: var(--blue);
}
.nav-item.active .nav-code { color: var(--blue); font-weight: 700; }
.nav-item.done .nav-check { opacity: 1; }

.nav-code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px; color: var(--text-3); min-width: 24px; flex-shrink: 0;
}
.nav-icon { font-size: 15px; flex-shrink: 0; }
.nav-label {
  font-size: 12.5px; font-weight: 500; color: var(--text-2); flex: 1; min-width: 0;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.nav-item.active .nav-label { color: var(--blue); font-weight: 600; }
.nav-check {
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--blue); display: grid; place-items: center;
  flex-shrink: 0; opacity: 0; transition: opacity var(--transition);
}
.nav-check::after { content: '✓'; color: white; font-size: 10px; font-weight: 700; }

/* Sidebar footer */
.sidebar-footer {
  padding: 12px 20px 20px; flex-shrink: 0;
  border-top: 1px solid var(--border);
}
.progress-label {
  display: flex; justify-content: space-between;
  font-size: 11px; color: var(--text-3); margin-bottom: 6px;
}
.progress-bar-wrap {
  height: 6px; background: var(--border); border-radius: 3px; overflow: hidden;
}
#sidebar-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--blue), var(--blue-lt));
  border-radius: 3px; transition: width .4s ease;
}

/* ═══════════════════════════════════════
   HAMBURGER
═══════════════════════════════════════ */
#hamburger {
  display: none; position: fixed; top: 14px; left: 14px; z-index: 300;
  width: 40px; height: 40px; border-radius: 10px;
  background: var(--blue); border: none; cursor: pointer;
  flex-direction: column; align-items: center; justify-content: center; gap: 5px;
  box-shadow: var(--s-md);
}
#hamburger span {
  display: block; width: 20px; height: 2px;
  background: white; border-radius: 1px; transition: var(--transition);
}
#overlay {
  display: none; position: fixed; inset: 0;
  background: rgba(0,0,0,.4); z-index: 150;
  backdrop-filter: blur(2px);
}

/* ═══════════════════════════════════════
   MAIN CONTENT
═══════════════════════════════════════ */
#content {
  margin-left: var(--sidebar-w);
  min-height: 100vh;
}

/* ═══════════════════════════════════════
   PAGES
═══════════════════════════════════════ */
.page {
  display: none; flex-direction: column; min-height: 100vh;
  animation: fadeIn .3s ease;
}
.page.active { display: flex; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ═══════════════════════════════════════
   HERO BAND
═══════════════════════════════════════ */
.hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--blue) 60%, var(--blue-lt) 100%);
  padding: 48px 48px 44px;
  border-radius: 0 0 var(--r-hero) var(--r-hero);
  position: relative; overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 80% 50%, rgba(255,255,255,.07) 0%, transparent 60%);
  pointer-events: none;
}
.hero-breadcrumb {
  font-size: 12px; color: rgba(255,255,255,.55);
  margin-bottom: 16px; letter-spacing: .5px;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.2);
  border-radius: 999px; padding: 5px 14px;
  font-family: 'JetBrains Mono', monospace; font-size: 12px;
  color: rgba(255,255,255,.85); margin-bottom: 18px;
}
.hero h1 {
  font-family: 'Syne', sans-serif; font-weight: 800;
  font-size: clamp(26px, 4vw, 40px); line-height: 1.1;
  background: linear-gradient(120deg, #ffffff 0%, #bfdbfe 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; margin-bottom: 12px;
}
.hero p {
  font-size: 15px; color: rgba(255,255,255,.65);
  max-width: 560px; line-height: 1.6;
}
.hero-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.chip {
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.2);
  border-radius: 999px; padding: 4px 12px;
  font-size: 12px; color: rgba(255,255,255,.8); font-weight: 500;
}

/* ═══════════════════════════════════════
   PAGE BODY
═══════════════════════════════════════ */
.page-body {
  flex: 1; padding: 44px 48px;
  max-width: 960px; width: 100%;
}

/* Section titles */
.sec-title {
  display: flex; align-items: center; gap: 10px;
  font-family: 'Syne', sans-serif; font-size: 20px; font-weight: 700;
  color: var(--text); margin-bottom: 6px;
}
.sec-title::before {
  content: '';
  display: block; width: 6px; height: 22px; border-radius: 3px;
  background: linear-gradient(180deg, var(--blue), var(--navy));
  flex-shrink: 0;
}
.sec-sub {
  font-size: 14px; color: var(--text-3); margin-bottom: 24px;
  margin-left: 16px;
}
.divider {
  height: 1px; background: var(--border);
  margin: 36px 0;
}

/* ═══════════════════════════════════════
   CARDS GRID
═══════════════════════════════════════ */
.cards-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px; margin-bottom: 24px;
}
.card {
  background: var(--white); border-radius: var(--r-card);
  box-shadow: var(--s-sm); border: 1px solid var(--border);
  padding: 22px; transition: transform var(--transition), box-shadow var(--transition);
  position: relative; overflow: hidden;
}
.card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--blue), var(--blue-lt));
}
.card:hover { transform: translateY(-3px); box-shadow: var(--s-lg); }
.card-icon { font-size: 26px; margin-bottom: 12px; }
.card h3 {
  font-family: 'Syne', sans-serif; font-size: 15px; font-weight: 700;
  color: var(--text); margin-bottom: 8px;
}
.card p { font-size: 13.5px; color: var(--text-2); line-height: 1.6; }
.card-tag {
  display: inline-block; margin-top: 12px;
  background: var(--blue-xs); color: var(--blue);
  border-radius: 999px; padding: 3px 10px; font-size: 11px; font-weight: 600;
}

/* ═══════════════════════════════════════
   INFO GRID (2 col)
═══════════════════════════════════════ */
.info-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 24px;
}
.info-box {
  background: var(--white); border-radius: var(--r-card);
  border: 1px solid var(--border); padding: 20px;
  box-shadow: var(--s-sm);
}
.info-box h4 {
  font-family: 'Syne', sans-serif; font-size: 13.5px; font-weight: 700;
  color: var(--blue); margin-bottom: 8px;
  display: flex; align-items: center; gap: 7px;
}
.info-box p { font-size: 13.5px; color: var(--text-2); line-height: 1.6; }

/* ═══════════════════════════════════════
   TABS
═══════════════════════════════════════ */
.tabs-wrap { margin-bottom: 28px; }
.tab-btns {
  display: flex; gap: 6px; flex-wrap: wrap;
  margin-bottom: 20px;
}
.tab-btn {
  padding: 8px 18px; border-radius: 999px;
  border: 1.5px solid var(--border);
  background: var(--white); color: var(--text-2);
  font-family: 'DM Sans', sans-serif; font-size: 13.5px; font-weight: 500;
  cursor: pointer; transition: all var(--transition);
}
.tab-btn:hover { border-color: var(--blue); color: var(--blue); }
.tab-btn.active {
  background: var(--blue); border-color: var(--blue);
  color: white; font-weight: 600;
}
.tab-panel { display: none; animation: fadeSlide .2s ease; }
.tab-panel.active { display: block; }
@keyframes fadeSlide {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ═══════════════════════════════════════
   ACCORDION
═══════════════════════════════════════ */
.accordion { margin-bottom: 8px; border-radius: var(--r-sm); overflow: hidden; border: 1px solid var(--border); }
.acc-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 18px; background: var(--white); cursor: pointer;
  transition: background var(--transition);
  font-weight: 600; font-size: 14px; color: var(--text);
  user-select: none;
}
.acc-header:hover { background: var(--surface); }
.accordion.open .acc-header { background: #eff1f9; color: var(--blue); }
.acc-chevron {
  transition: transform var(--transition); font-size: 12px; color: var(--text-3);
}
.accordion.open .acc-chevron { transform: rotate(180deg); }
.acc-body {
  max-height: 0; overflow: hidden;
  transition: max-height .35s ease, padding .2s ease;
  background: var(--white);
}
.accordion.open .acc-body { max-height: 900px; }
.acc-inner { padding: 4px 18px 18px; font-size: 13.5px; color: var(--text-2); line-height: 1.7; }

/* ═══════════════════════════════════════
   EJERCICIOS
═══════════════════════════════════════ */
.ejercicio {
  background: var(--white); border-radius: var(--r-card);
  border: 1px solid var(--border); margin-bottom: 14px;
  box-shadow: var(--s-sm); overflow: hidden;
}
.ej-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px; cursor: pointer; transition: background var(--transition);
}
.ej-header:hover { background: var(--surface); }
.ejercicio.open .ej-header { background: var(--blue-xs); }
.ej-title {
  font-family: 'Syne', sans-serif; font-weight: 700; font-size: 14.5px; color: var(--text);
}
.ejercicio.open .ej-title { color: var(--blue); }
.ej-badge {
  background: var(--blue); color: white;
  border-radius: 999px; padding: 3px 11px; font-size: 11px; font-weight: 600;
  flex-shrink: 0;
}
.ej-body {
  max-height: 0; overflow: hidden;
  transition: max-height .35s ease;
}
.ejercicio.open .ej-body { max-height: 1200px; }
.ej-inner { padding: 4px 20px 20px; }
.ej-context {
  background: var(--surface2); border-radius: var(--r-sm);
  padding: 14px 16px; margin-bottom: 14px;
  font-size: 13.5px; color: var(--text-2); line-height: 1.65;
  border-left: 3px solid var(--blue);
}
.ej-context strong { color: var(--blue); display: block; margin-bottom: 6px; font-size: 13px; }
.ej-questions { margin-bottom: 14px; }
.ej-questions ol { padding-left: 18px; }
.ej-questions li {
  font-size: 13.5px; color: var(--text-2); line-height: 1.65;
  margin-bottom: 8px; padding-left: 4px;
}
.btn-solucion {
  display: inline-flex; align-items: center; gap: 7px;
  background: var(--surface2); border: 1.5px solid var(--blue);
  color: var(--blue); border-radius: var(--r-sm);
  padding: 8px 16px; font-size: 13px; font-weight: 600;
  cursor: pointer; transition: all var(--transition);
}
.btn-solucion:hover { background: var(--blue); color: white; }
.solucion-panel {
  margin-top: 14px; display: none;
  background: #f0fdf4; border-radius: var(--r-sm);
  border: 1px solid #86efac; padding: 16px;
}
.solucion-panel.visible { display: block; }
.solucion-panel h5 {
  color: #16a34a; font-size: 13px; font-weight: 700; margin-bottom: 10px;
}
.solucion-panel p, .solucion-panel li {
  font-size: 13.5px; color: #166534; line-height: 1.65;
}
.solucion-panel ol { padding-left: 18px; }
.solucion-panel li { margin-bottom: 6px; }

/* ═══════════════════════════════════════
   FAQ
═══════════════════════════════════════ */
.faq-item {
  border-bottom: 1px solid var(--border); overflow: hidden;
}
.faq-item:last-child { border-bottom: none; }
.faq-q {
  padding: 16px 4px; cursor: pointer;
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
  font-weight: 600; font-size: 14px; color: var(--text);
  transition: color var(--transition); user-select: none;
}
.faq-q:hover { color: var(--blue); }
.faq-icon { font-size: 18px; color: var(--text-3); transition: transform var(--transition); flex-shrink: 0; }
.faq-item.open .faq-q { color: var(--blue); }
.faq-item.open .faq-icon { transform: rotate(45deg); color: var(--blue); }
.faq-a {
  max-height: 0; overflow: hidden;
  transition: max-height .3s ease;
  font-size: 13.5px; color: var(--text-2); line-height: 1.7;
}
.faq-item.open .faq-a { max-height: 400px; }
.faq-a-inner { padding: 0 4px 16px; }

/* ═══════════════════════════════════════
   TABLES
═══════════════════════════════════════ */
.table-wrap { overflow-x: auto; border-radius: var(--r-card); box-shadow: var(--s-sm); margin-bottom: 24px; }
table {
  width: 100%; border-collapse: collapse;
  background: var(--white); font-size: 13.5px;
}
thead tr { background: var(--navy); color: white; }
thead th {
  padding: 12px 16px; text-align: left;
  font-family: 'Syne', sans-serif; font-size: 13px; font-weight: 700;
  white-space: nowrap;
}
tbody tr:nth-child(even) { background: #f8fafc; }
tbody tr:hover { background: var(--blue-xs); }
tbody td {
  padding: 11px 16px; color: var(--text-2); border-bottom: 1px solid var(--border);
  vertical-align: top; line-height: 1.5;
}
tbody td:first-child { font-weight: 600; color: var(--text); }

/* ═══════════════════════════════════════
   FLOW / PROCESO
═══════════════════════════════════════ */
.flow-wrap {
  display: flex; flex-wrap: wrap; align-items: flex-start;
  gap: 0; margin-bottom: 24px;
}
.flow-step { display: flex; align-items: flex-start; }
.flow-node { text-align: center; width: 130px; flex-shrink: 0; }
.flow-circle {
  width: 60px; height: 60px; border-radius: 50%;
  background: linear-gradient(135deg, var(--blue), var(--navy));
  display: grid; place-items: center; margin: 0 auto 10px;
  font-size: 22px; box-shadow: var(--s-md);
}
.flow-node h4 {
  font-family: 'Syne', sans-serif; font-size: 12.5px; font-weight: 700;
  color: var(--text); margin-bottom: 4px;
}
.flow-node p { font-size: 11.5px; color: var(--text-3); line-height: 1.4; }
.flow-arrow {
  align-self: flex-start; margin-top: 18px;
  font-size: 20px; color: var(--blue); flex-shrink: 0; padding: 0 4px;
}

/* ═══════════════════════════════════════
   CALLOUTS
═══════════════════════════════════════ */
.callout {
  border-radius: var(--r-sm); padding: 14px 16px;
  margin-bottom: 14px; border-left: 3.5px solid;
  font-size: 13.5px; line-height: 1.6;
}
.callout strong { display: block; font-size: 13px; margin-bottom: 4px; }
.info-box-c  { background: #eff6ff; border-color: var(--blue); color: #1e40af; }
.warn-box    { background: #fffbeb; border-color: #f59e0b; color: #92400e; }
.success-box { background: #f0fdf4; border-color: #22c55e; color: #166534; }
.danger-box  { background: #fef2f2; border-color: #ef4444; color: #991b1b; }
.navy-box    { background: var(--surface2); border-color: var(--navy); color: var(--navy); }

/* ═══════════════════════════════════════
   STATS / WELCOME
═══════════════════════════════════════ */
.stats-row {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 14px; margin-bottom: 28px;
}
.stat-card {
  background: var(--white); border-radius: var(--r-card);
  border: 1px solid var(--border); padding: 20px;
  text-align: center; box-shadow: var(--s-sm);
  transition: transform var(--transition);
}
.stat-card:hover { transform: translateY(-2px); }
.stat-num {
  font-family: 'Syne', sans-serif; font-size: 32px; font-weight: 800;
  background: linear-gradient(135deg, var(--blue), var(--navy));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label { font-size: 12px; color: var(--text-3); margin-top: 4px; font-weight: 500; }

.topic-map {
  display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 28px;
}
.topic-item {
  background: var(--white); border-radius: var(--r-sm);
  border: 1px solid var(--border); padding: 14px 16px;
  display: flex; align-items: center; gap: 10px;
  cursor: pointer; transition: all var(--transition);
  box-shadow: var(--s-sm);
}
.topic-item:hover { border-color: var(--blue); background: var(--blue-xs); transform: translateX(3px); }
.topic-num {
  font-family: 'JetBrains Mono', monospace; font-size: 11px;
  color: var(--blue); font-weight: 600; flex-shrink: 0;
}
.topic-name { font-size: 13px; font-weight: 600; color: var(--text); }

/* ═══════════════════════════════════════
   QUIZ
═══════════════════════════════════════ */
.quiz-wrap {
  background: var(--white); border-radius: var(--r-card);
  border: 1px solid var(--border); box-shadow: var(--s-md);
  padding: 32px; max-width: 720px;
}
.quiz-meta {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 14px;
}
.quiz-counter {
  font-family: 'JetBrains Mono', monospace; font-size: 13px;
  color: var(--text-3);
}
.quiz-progress-bar {
  flex: 1; height: 6px; background: var(--border);
  border-radius: 3px; margin: 0 16px; overflow: hidden;
}
.quiz-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--blue), var(--blue-lt));
  border-radius: 3px; transition: width .4s ease;
}
.quiz-question {
  font-family: 'Syne', sans-serif; font-size: 17px; font-weight: 700;
  color: var(--text); margin-bottom: 22px; line-height: 1.4;
}
.quiz-options { display: flex; flex-direction: column; gap: 10px; margin-bottom: 20px; }
.quiz-opt {
  padding: 13px 18px; border-radius: var(--r-sm);
  border: 1.5px solid var(--border); background: var(--white);
  text-align: left; cursor: pointer; font-size: 14px; color: var(--text-2);
  transition: all var(--transition); font-family: 'DM Sans', sans-serif;
  font-weight: 500;
}
.quiz-opt:hover:not(:disabled) { border-color: var(--blue); color: var(--blue); background: var(--blue-xs); }
.quiz-opt.correct { background: #f0fdf4; border-color: #22c55e; color: #166534; font-weight: 600; }
.quiz-opt.wrong   { background: #fef2f2; border-color: #ef4444; color: #991b1b; }
.quiz-opt:disabled { cursor: default; }
.quiz-feedback {
  background: var(--surface2); border-radius: var(--r-sm);
  padding: 14px 16px; font-size: 13.5px; color: var(--text-2);
  line-height: 1.6; border-left: 3px solid var(--blue);
  margin-bottom: 16px; display: none;
}
.quiz-feedback.visible { display: block; }
.quiz-feedback.ok { border-color: #22c55e; background: #f0fdf4; color: #166534; }
.quiz-feedback.ko { border-color: #ef4444; background: #fef2f2; color: #991b1b; }
.btn-next {
  display: none; padding: 11px 28px; border-radius: 999px;
  background: var(--blue); color: white; border: none;
  font-family: 'DM Sans', sans-serif; font-size: 14px; font-weight: 600;
  cursor: pointer; transition: background var(--transition);
}
.btn-next:hover { background: var(--navy); }
.btn-next.visible { display: inline-block; }

/* Result screen */
.quiz-result { text-align: center; padding: 20px 0; }
.result-score {
  font-family: 'Syne', sans-serif; font-size: 64px; font-weight: 800;
  background: linear-gradient(135deg, var(--blue), var(--navy));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.result-label { font-size: 16px; color: var(--text-3); margin-bottom: 20px; }
.result-bar-wrap { height: 14px; background: var(--border); border-radius: 7px; overflow: hidden; margin-bottom: 16px; }
.result-bar-fill {
  height: 100%; border-radius: 7px;
  transition: width 1s cubic-bezier(.4,0,.2,1);
}
.result-msg { font-size: 15px; color: var(--text-2); margin-bottom: 24px; line-height: 1.6; }
.btn-retry {
  padding: 11px 28px; border-radius: 999px;
  background: var(--blue); color: white; border: none;
  font-family: 'DM Sans', sans-serif; font-size: 14px; font-weight: 600;
  cursor: pointer; transition: background var(--transition);
}
.btn-retry:hover { background: var(--navy); }

/* ═══════════════════════════════════════
   SIMULADORES
═══════════════════════════════════════ */
.sim-wrap {
  background: var(--white); border-radius: var(--r-card);
  border: 1px solid var(--border); box-shadow: var(--s-md);
  padding: 28px; margin-bottom: 24px;
}
.sim-title {
  font-family: 'Syne', sans-serif; font-size: 16px; font-weight: 700;
  color: var(--blue); margin-bottom: 6px;
  display: flex; align-items: center; gap: 8px;
}
.sim-desc { font-size: 13px; color: var(--text-3); margin-bottom: 20px; line-height: 1.5; }

/* Sim 1: Mapa Poder/Interés drag */
.power-map-grid {
  display: grid; grid-template-columns: 1fr 1fr; grid-template-rows: 1fr 1fr;
  gap: 8px; margin-bottom: 16px; min-height: 320px;
}
.pm-quadrant {
  border-radius: var(--r-sm); border: 2px dashed var(--border);
  padding: 10px; min-height: 140px; transition: all var(--transition);
  display: flex; flex-direction: column; gap: 6px;
  position: relative;
}
.pm-quadrant.drag-over { border-color: var(--blue); background: var(--blue-xs); }
.pm-quadrant.correct-zone { border-color: #22c55e; background: #f0fdf4; }
.pm-quadrant-label {
  font-size: 11px; font-weight: 700; color: var(--text-3);
  text-transform: uppercase; letter-spacing: .5px;
  margin-bottom: 4px;
}
.pm-quadrant-strategy {
  font-size: 11px; color: var(--blue); font-weight: 600;
  font-style: italic;
}
.pm-card {
  background: var(--blue); color: white;
  border-radius: 6px; padding: 7px 10px;
  font-size: 12px; font-weight: 600; cursor: grab;
  transition: all var(--transition); user-select: none;
  display: flex; align-items: center; gap: 5px;
  box-shadow: var(--s-sm);
}
.pm-card:hover { background: var(--navy); transform: scale(1.02); }
.pm-card.correct { background: #16a34a; }
.pm-card.wrong { background: #ef4444; }
.pm-bank {
  background: var(--surface); border-radius: var(--r-sm);
  border: 1px solid var(--border); padding: 14px;
  margin-bottom: 12px;
}
.pm-bank-label { font-size: 12px; font-weight: 600; color: var(--text-3); margin-bottom: 10px; }
.pm-cards-row { display: flex; flex-wrap: wrap; gap: 8px; min-height: 44px; }
.sim-feedback {
  border-radius: var(--r-sm); padding: 12px 14px;
  font-size: 13.5px; font-weight: 500; display: none; margin-top: 10px;
}
.sim-feedback.visible { display: block; }
.sim-feedback.ok { background: #f0fdf4; color: #166534; border: 1px solid #86efac; }
.sim-feedback.ko { background: #fef2f2; color: #991b1b; border: 1px solid #fca5a5; }
.sim-btn {
  padding: 9px 22px; border-radius: 999px;
  background: var(--blue); color: white; border: none;
  font-size: 13.5px; font-weight: 600; cursor: pointer;
  transition: background var(--transition); margin-top: 10px;
}
.sim-btn:hover { background: var(--navy); }
.sim-btn.secondary {
  background: transparent; color: var(--blue);
  border: 1.5px solid var(--blue); margin-left: 8px;
}
.sim-btn.secondary:hover { background: var(--blue-xs); }

/* Sim 2: Registro interactivo */
.registro-form { display: flex; flex-direction: column; gap: 14px; }
.reg-row { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 10px; }
.reg-field { display: flex; flex-direction: column; gap: 5px; }
.reg-label { font-size: 12px; font-weight: 600; color: var(--text-3); }
.reg-input, .reg-select {
  padding: 9px 12px; border-radius: var(--r-sm);
  border: 1.5px solid var(--border); background: var(--surface);
  font-family: 'DM Sans', sans-serif; font-size: 13.5px; color: var(--text);
  transition: border-color var(--transition);
}
.reg-input:focus, .reg-select:focus {
  outline: none; border-color: var(--blue); background: white;
}
.reg-input.error { border-color: #ef4444; background: #fef2f2; }
.reg-input.ok-field { border-color: #22c55e; background: #f0fdf4; }

/* Sim 3: Bola de Nieve */
.snowball-wrap { position: relative; }
.snowball-graph {
  background: var(--surface2); border-radius: var(--r-sm);
  min-height: 300px; padding: 20px; display: flex;
  flex-wrap: wrap; align-items: center; justify-content: center; gap: 14px;
  margin-bottom: 14px; position: relative;
}
.sb-node {
  background: var(--white); border: 2px solid var(--border);
  border-radius: var(--r-card); padding: 12px 16px; text-align: center;
  cursor: pointer; transition: all var(--transition); max-width: 130px;
  box-shadow: var(--s-sm);
}
.sb-node:hover { border-color: var(--blue); transform: scale(1.04); }
.sb-node.revealed { border-color: var(--blue); background: var(--blue-xs); }
.sb-node.seed { border-color: var(--navy); background: var(--navy); color: white; cursor: default; }
.sb-node.seed:hover { transform: none; }
.sb-icon { font-size: 22px; margin-bottom: 6px; }
.sb-name { font-size: 12px; font-weight: 700; color: inherit; margin-bottom: 3px; }
.sb-role { font-size: 11px; color: var(--text-3); }
.sb-node.revealed .sb-role { color: var(--blue); }
.sb-node.seed .sb-name, .sb-node.seed .sb-role { color: rgba(255,255,255,.85); }
.sb-arrow {
  display: none; color: var(--blue); font-size: 20px; align-self: center;
}
.sb-arrow.visible { display: block; }
.sb-counter {
  font-family: 'JetBrains Mono', monospace; font-size: 13px; color: var(--text-3);
  margin-bottom: 10px;
}
.sb-tooltip {
  background: var(--navy); color: white;
  border-radius: var(--r-sm); padding: 10px 14px;
  font-size: 12.5px; line-height: 1.5; display: none;
  margin-bottom: 12px; max-width: 460px;
}
.sb-tooltip.visible { display: block; }

/* Sim 4: Clasificador de estrategias */
.strat-scenario {
  background: var(--surface2); border-radius: var(--r-sm);
  border-left: 3px solid var(--blue); padding: 16px;
  margin-bottom: 18px; font-size: 14px; color: var(--text-2); line-height: 1.6;
}
.strat-scenario strong { color: var(--blue); font-size: 12px; display: block; margin-bottom: 6px; }
.strat-opts { display: flex; flex-direction: column; gap: 8px; margin-bottom: 14px; }
.strat-opt {
  padding: 11px 16px; border-radius: var(--r-sm);
  border: 1.5px solid var(--border); background: var(--white);
  text-align: left; cursor: pointer; font-size: 13.5px; color: var(--text-2);
  transition: all var(--transition); font-family: 'DM Sans', sans-serif;
  font-weight: 500;
}
.strat-opt:hover:not(:disabled) { border-color: var(--blue); color: var(--blue); background: var(--blue-xs); }
.strat-opt.correct { background: #f0fdf4; border-color: #22c55e; color: #166534; font-weight: 600; }
.strat-opt.wrong   { background: #fef2f2; border-color: #ef4444; color: #991b1b; }
.strat-score {
  font-family: 'Syne', sans-serif; font-size: 15px; font-weight: 700;
  color: var(--blue); margin-bottom: 10px;
}
.strat-nav { display: flex; align-items: center; gap: 10px; margin-top: 6px; }

/* Power/Interest visual labels on quadrants */
.pm-q-corner {
  position: absolute; top: 6px; right: 8px;
  font-size: 10px; font-weight: 700; color: var(--text-3); text-align: right;
}

/* ═══════════════════════════════════════
   NAV FOOTER
═══════════════════════════════════════ */
.nav-footer {
  display: flex; align-items: center; justify-content: space-between;
  padding: 24px 48px; border-top: 1px solid var(--border);
  background: var(--white); margin-top: auto;
}
.nav-footer-center { font-size: 13px; color: var(--text-3); font-family: 'JetBrains Mono', monospace; }
.btn-prev, .btn-next-pg {
  padding: 10px 24px; border-radius: 999px; font-size: 14px;
  font-family: 'DM Sans', sans-serif; font-weight: 600; cursor: pointer;
  transition: all var(--transition);
}
.btn-prev {
  background: transparent; color: var(--blue);
  border: 1.5px solid var(--blue);
}
.btn-prev:hover { background: var(--blue-xs); }
.btn-next-pg {
  background: var(--blue); color: white; border: none;
}
.btn-next-pg:hover { background: var(--navy); }
.btn-prev:disabled, .btn-next-pg:disabled {
  opacity: .35; cursor: not-allowed; pointer-events: none;
}

/* ═══════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════ */
@media (max-width: 1024px) {
  #sidebar { transform: translateX(-100%); }
  #sidebar.open { transform: translateX(0); }
  #hamburger { display: flex; }
  #overlay.visible { display: block; }
  #content { margin-left: 0; }
  .info-grid, .cards-grid { grid-template-columns: 1fr; }
  .topic-map { grid-template-columns: 1fr; }
  .hero { padding: 56px 24px 36px; }
  .page-body { padding: 28px 24px; }
  .nav-footer { padding: 20px 24px; }
  .pm-q-corner { display: none; }
}
@media (max-width: 640px) {
  .hero h1 { font-size: 22px; }
  .reg-row { grid-template-columns: 1fr; }
  .quiz-wrap { padding: 20px; }
  .nav-footer { flex-wrap: wrap; gap: 10px; justify-content: center; }
  .power-map-grid { grid-template-columns: 1fr; grid-template-rows: auto; }
  .tab-btns { gap: 4px; }
  .tab-btn { padding: 7px 12px; font-size: 12.5px; }
}

/* ═══════════════════════════════════════
   VISUAL EXAMPLE COMPONENTS
═══════════════════════════════════════ */

/* Example wrapper */
.ex-wrap {
  margin-bottom: 12px;
  border: 1px solid var(--border);
  border-radius: var(--r-card);
  overflow: hidden;
  background: var(--white);
  box-shadow: var(--s-sm);
}
.ex-header {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 16px;
  background: linear-gradient(90deg, var(--navy), var(--blue));
  color: white;
}
.ex-header-num {
  font-family: 'JetBrains Mono', monospace; font-size: 11px;
  background: rgba(255,255,255,.2); border-radius: 4px;
  padding: 2px 7px; flex-shrink: 0;
}
.ex-header-title { font-size: 13px; font-weight: 600; line-height: 1.3; }
.ex-body { padding: 16px; }

/* Example 2 uses teal accent */
.ex-wrap.ex-2 .ex-header {
  background: linear-gradient(90deg, #065f46, #059669);
}

/* Step list */
.step-list { display: flex; flex-direction: column; gap: 0; }
.step-item {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 10px 0; border-bottom: 1px dashed var(--border);
  position: relative;
}
.step-item:last-child { border-bottom: none; }
.step-num {
  width: 28px; height: 28px; border-radius: 50%; flex-shrink: 0;
  background: linear-gradient(135deg, var(--blue), var(--navy));
  color: white; font-size: 12px; font-weight: 700;
  display: grid; place-items: center;
}
.ex-wrap.ex-2 .step-num { background: linear-gradient(135deg, #059669, #065f46); }
.step-content { flex: 1; }
.step-label { font-size: 12px; font-weight: 700; color: var(--text); margin-bottom: 2px; }
.step-desc { font-size: 12.5px; color: var(--text-2); line-height: 1.5; }
.step-badge {
  font-size: 10.5px; font-weight: 700; border-radius: 999px;
  padding: 2px 9px; flex-shrink: 0; margin-top: 2px;
  display: inline-block;
}
.badge-blue { background: var(--blue-xs); color: var(--blue); }
.badge-green { background: #d1fae5; color: #065f46; }
.badge-orange { background: #fff7ed; color: #c2410c; }
.badge-red { background: #fee2e2; color: #991b1b; }
.badge-purple { background: #f3e8ff; color: #7c3aed; }

/* KPI row */
.kpi-row {
  display: grid; gap: 10px; margin-bottom: 14px;
}
.kpi-row.cols-3 { grid-template-columns: repeat(3,1fr); }
.kpi-row.cols-4 { grid-template-columns: repeat(4,1fr); }
.kpi-row.cols-2 { grid-template-columns: repeat(2,1fr); }
.kpi-card {
  background: var(--surface2); border-radius: var(--r-sm);
  border: 1px solid var(--border); padding: 12px 10px; text-align: center;
}
.kpi-val {
  font-family: 'Syne', sans-serif; font-size: 22px; font-weight: 800;
  background: linear-gradient(135deg, var(--blue), var(--navy));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; line-height: 1.1; margin-bottom: 4px;
}
.kpi-val.green { background: linear-gradient(135deg, #059669, #065f46);
  -webkit-background-clip: text; background-clip: text; }
.kpi-val.orange { background: linear-gradient(135deg, #ea580c, #9a3412);
  -webkit-background-clip: text; background-clip: text; }
.kpi-label { font-size: 11px; color: var(--text-3); font-weight: 600; line-height: 1.3; }

/* Mini process flow */
.mini-flow {
  display: flex; flex-wrap: wrap; align-items: center;
  gap: 4px; margin-bottom: 14px;
}
.mini-node {
  background: var(--blue-xs); border: 1.5px solid var(--blue);
  border-radius: 8px; padding: 8px 12px; font-size: 12px;
  font-weight: 600; color: var(--blue); text-align: center;
  min-width: 80px;
}
.mini-node.green { background: #d1fae5; border-color: #059669; color: #065f46; }
.mini-node.orange { background: #fff7ed; border-color: #ea580c; color: #c2410c; }
.mini-node.navy { background: var(--navy); border-color: var(--navy); color: white; }
.mini-node.red { background: #fee2e2; border-color: #dc2626; color: #991b1b; }
.mini-arrow {
  color: var(--text-3); font-size: 14px; font-weight: 700; flex-shrink: 0;
}

/* Comparison table mini */
.mini-table { width: 100%; border-collapse: collapse; font-size: 12.5px; margin-bottom: 12px; }
.mini-table th {
  background: var(--navy); color: white; padding: 8px 12px;
  font-family: 'Syne', sans-serif; font-size: 12px; font-weight: 700;
  text-align: left;
}
.mini-table td { padding: 8px 12px; border-bottom: 1px solid var(--border); color: var(--text-2); vertical-align: top; }
.mini-table tr:last-child td { border-bottom: none; }
.mini-table tr:nth-child(even) td { background: var(--surface); }
.mini-table td:first-child { font-weight: 600; color: var(--text); }
.mini-table.green th { background: #065f46; }

/* Actor cards grid */
.actor-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(130px,1fr));
  gap: 8px; margin-bottom: 12px;
}
.actor-card {
  background: var(--surface); border: 1.5px solid var(--border);
  border-radius: 10px; padding: 10px 8px; text-align: center;
  transition: transform var(--transition), border-color var(--transition);
}
.actor-card:hover { transform: translateY(-2px); border-color: var(--blue); }
.actor-icon { font-size: 20px; margin-bottom: 5px; }
.actor-name { font-size: 11.5px; font-weight: 700; color: var(--text); margin-bottom: 3px; line-height: 1.2; }
.actor-role { font-size: 10.5px; color: var(--text-3); line-height: 1.3; }
.actor-card.priority-high { border-color: var(--blue); background: var(--blue-xs); }
.actor-card.priority-high .actor-name { color: var(--blue); }
.actor-card.priority-med { border-color: #f59e0b; background: #fffbeb; }
.actor-card.priority-med .actor-name { color: #92400e; }

/* Onion diagram CSS */
.onion-wrap {
  display: flex; align-items: center; justify-content: center;
  padding: 16px 0 8px; margin-bottom: 12px; overflow-x: auto;
}
.onion {
  position: relative; width: 280px; height: 280px; flex-shrink: 0;
}
.onion-ring {
  position: absolute; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  top: 50%; left: 50%; transform: translate(-50%,-50%);
}
.onion-label {
  font-size: 11px; font-weight: 700; text-align: center; line-height: 1.2;
  max-width: 70px;
}
.onion-legend { flex: 1; min-width: 180px; padding-left: 20px; }
.onion-legend-item {
  display: flex; align-items: flex-start; gap: 8px; margin-bottom: 10px;
}
.onion-dot {
  width: 12px; height: 12px; border-radius: 50%; flex-shrink: 0; margin-top: 2px;
}
.onion-legend-text { font-size: 12px; color: var(--text-2); line-height: 1.4; }
.onion-legend-text strong { display: block; color: var(--text); font-size: 12px; margin-bottom: 1px; }

/* Timeline */
.timeline { display: flex; flex-direction: column; gap: 0; margin-bottom: 12px; }
.tl-item {
  display: flex; gap: 14px; padding-bottom: 14px;
  position: relative;
}
.tl-item:last-child { padding-bottom: 0; }
.tl-left { display: flex; flex-direction: column; align-items: center; flex-shrink: 0; width: 32px; }
.tl-dot {
  width: 32px; height: 32px; border-radius: 50%; flex-shrink: 0;
  display: grid; place-items: center; font-size: 14px;
  background: linear-gradient(135deg, var(--blue), var(--navy));
  box-shadow: var(--s-sm);
}
.tl-line {
  flex: 1; width: 2px; background: var(--border); margin-top: 4px;
}
.tl-item:last-child .tl-line { display: none; }
.tl-content { flex: 1; padding-top: 4px; }
.tl-title { font-size: 13px; font-weight: 700; color: var(--text); margin-bottom: 3px; }
.tl-desc { font-size: 12.5px; color: var(--text-2); line-height: 1.5; }
.tl-tag {
  display: inline-block; margin-top: 4px;
  font-size: 10.5px; font-weight: 700; border-radius: 999px; padding: 2px 9px;
}

/* Result bar visual */
.result-visual {
  display: flex; align-items: center; gap: 10px; margin: 8px 0;
}
.result-visual-label { font-size: 12px; font-weight: 600; color: var(--text-2); min-width: 110px; }
.result-visual-bar { flex: 1; height: 10px; background: var(--border); border-radius: 5px; overflow: hidden; }
.result-visual-fill { height: 100%; border-radius: 5px; }
.result-visual-val { font-size: 12px; font-weight: 700; color: var(--text); min-width: 36px; text-align: right; }

/* 2-col example layout */
.ex-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 12px; }
.ex-col { background: var(--surface); border-radius: var(--r-sm); border: 1px solid var(--border); padding: 12px; }
.ex-col-title { font-size: 11px; font-weight: 700; color: var(--blue); margin-bottom: 8px; text-transform: uppercase; letter-spacing: .5px; }
.ex-col.green .ex-col-title { color: #065f46; }

/* Impact matrix cells */
.impact-grid { display: grid; grid-template-columns: auto 1fr 1fr; gap: 1px; background: var(--border); border-radius: 8px; overflow: hidden; margin-bottom: 12px; font-size: 12px; }
.ig-cell { background: var(--white); padding: 8px 10px; }
.ig-header { background: var(--navy); color: white; font-weight: 700; text-align: center; }
.ig-label { background: var(--surface); font-weight: 600; color: var(--text-2); }
.ig-high { background: #fef2f2; color: #991b1b; font-weight: 600; }
.ig-med  { background: #fffbeb; color: #92400e; }
.ig-low  { background: #f0fdf4; color: #166534; }

@media (max-width: 640px) {
  .kpi-row.cols-3, .kpi-row.cols-4 { grid-template-columns: repeat(2,1fr); }
  .ex-cols { grid-template-columns: 1fr; }
  .onion-wrap { flex-direction: column; }
  .onion-legend { padding-left: 0; padding-top: 12px; }
  .actor-grid { grid-template-columns: repeat(2,1fr); }
}