/* =========================================================
   PilotQuizz - Main Stylesheet v1.1
   Professional Aviation Training Platform
   Build: 2026-06-21
   ========================================================= */

/* ---- CSS Variables / Design Tokens ---- */
:root {
  /* Brand Colors */
  --color-navy:       #0a1628;
  --color-navy-mid:   #112240;
  --color-blue:       #1a3a6b;
  --color-blue-mid:   #1e4d9b;
  --color-sky:        #2979ff;
  --color-sky-light:  #5393ff;
  --color-accent:     #00c6ff;
  --color-gold:       #f4a72e;
  --color-gold-dark:  #c87f00;
  --color-success:    #00c9a7;
  --color-warning:    #ffb347;
  --color-danger:     #ff5252;

  /* Neutral Colors */
  --color-white:      #ffffff;
  --color-off-white:  #f0f4ff;
  --color-gray-100:   #e8edf6;
  --color-gray-200:   #cdd5e4;
  --color-gray-400:   #8898b0;
  --color-gray-600:   #4a5568;
  --color-gray-800:   #1e2a3a;

  /* Typography */
  --font-primary:    'Inter', 'Segoe UI', sans-serif;
  --font-mono:       'JetBrains Mono', 'Courier New', monospace;
  --font-size-xs:    0.75rem;
  --font-size-sm:    0.875rem;
  --font-size-base:  1rem;
  --font-size-lg:    1.125rem;
  --font-size-xl:    1.25rem;
  --font-size-2xl:   1.5rem;
  --font-size-3xl:   1.875rem;
  --font-size-4xl:   2.25rem;
  --font-size-5xl:   3rem;
  --font-size-6xl:   3.75rem;

  /* Spacing */
  --spacing-xs:   0.25rem;
  --spacing-sm:   0.5rem;
  --spacing-md:   1rem;
  --spacing-lg:   1.5rem;
  --spacing-xl:   2rem;
  --spacing-2xl:  3rem;
  --spacing-3xl:  4rem;
  --spacing-4xl:  6rem;

  /* Borders & Shadows */
  --radius-sm:    0.25rem;
  --radius-md:    0.5rem;
  --radius-lg:    1rem;
  --radius-xl:    1.5rem;
  --radius-full:  9999px;
  --shadow-sm:    0 1px 3px rgba(0,0,0,0.3);
  --shadow-md:    0 4px 16px rgba(0,0,0,0.3);
  --shadow-lg:    0 10px 40px rgba(0,0,0,0.4);
  --shadow-glow:  0 0 30px rgba(41,121,255,0.25);
  --shadow-gold:  0 0 20px rgba(244,167,46,0.3);

  /* Transitions */
  --transition-fast:   0.15s ease;
  --transition-base:   0.3s ease;
  --transition-slow:   0.5s ease;

  /* Gradients */
  --gradient-hero:     linear-gradient(135deg, #0a1628 0%, #112240 50%, #1a3a6b 100%);
  --gradient-card:     linear-gradient(135deg, rgba(26,58,107,0.8) 0%, rgba(17,34,64,0.9) 100%);
  --gradient-accent:   linear-gradient(90deg, #2979ff, #00c6ff);
  --gradient-gold:     linear-gradient(90deg, #f4a72e, #ffd085);
}

/* ---- Reset & Base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-primary);
  background-color: var(--color-navy);
  color: var(--color-white);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

a { color: var(--color-accent); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--color-sky-light); }

img { max-width: 100%; height: auto; display: block; }

ul, ol { list-style: none; }

button {
  cursor: pointer;
  font-family: var(--font-primary);
  border: none;
  outline: none;
}

input, select, textarea {
  font-family: var(--font-primary);
  outline: none;
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--color-navy-mid); }
::-webkit-scrollbar-thumb { background: var(--color-blue-mid); border-radius: var(--radius-full); }

/* ============================================================
   LAYOUT UTILITIES
   ============================================================ */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
}

.container-sm { max-width: 800px; }
.container-lg { max-width: 1440px; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }
.gap-xl { gap: var(--spacing-xl); }

.grid { display: grid; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.text-center { text-align: center; }
.text-right { text-align: right; }

.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }
.mt-2xl { margin-top: var(--spacing-2xl); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }
.mb-2xl { margin-bottom: var(--spacing-2xl); }

.section { padding: var(--spacing-4xl) 0; }
.section-sm { padding: var(--spacing-2xl) 0; }

.hidden { display: none !important; }
.visible { display: block !important; }

/* ============================================================
   TYPOGRAPHY
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.heading-xl { font-size: var(--font-size-6xl); }
.heading-lg { font-size: var(--font-size-5xl); }
.heading-md { font-size: var(--font-size-4xl); }
.heading-sm { font-size: var(--font-size-3xl); }
.heading-xs { font-size: var(--font-size-2xl); }

.text-gradient {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-gold {
  background: var(--gradient-gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-muted { color: var(--color-gray-400); }
.text-sm { font-size: var(--font-size-sm); }
.text-xs { font-size: var(--font-size-xs); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }

.label-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  background: rgba(41,121,255,0.12);
  border: 1px solid rgba(41,121,255,0.3);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  font-weight: 600;
  transition: all var(--transition-base);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0);
  transition: background var(--transition-fast);
}

.btn:hover::before { background: rgba(255,255,255,0.08); }

.btn-primary {
  background: var(--gradient-accent);
  color: var(--color-white);
  box-shadow: 0 4px 20px rgba(41,121,255,0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(41,121,255,0.5);
  color: var(--color-white);
}

.btn-gold {
  background: var(--gradient-gold);
  color: var(--color-navy);
  box-shadow: var(--shadow-gold);
}

.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(244,167,46,0.5);
  color: var(--color-navy);
}

.btn-outline {
  background: transparent;
  color: var(--color-white);
  border: 2px solid rgba(255,255,255,0.3);
}

.btn-outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-2px);
}

.btn-ghost {
  background: rgba(255,255,255,0.06);
  color: var(--color-white);
  border: 1px solid rgba(255,255,255,0.1);
}

.btn-ghost:hover {
  background: rgba(255,255,255,0.1);
  color: var(--color-white);
}

.btn-danger {
  background: var(--color-danger);
  color: var(--color-white);
}

.btn-sm { padding: 0.45rem 0.9rem; font-size: 0.78rem; }
.btn-lg { padding: 1rem 2.5rem; font-size: var(--font-size-lg); }
.btn-xl { padding: 1.2rem 3rem; font-size: var(--font-size-xl); }
.btn-icon { padding: 0.6rem; width: 2.5rem; height: 2.5rem; }
.btn-full { width: 100%; }

/* ============================================================
   CARDS
   ============================================================ */
.card {
  background: var(--gradient-card);
  border: 1px solid rgba(41,121,255,0.15);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.card:hover {
  border-color: rgba(41,121,255,0.4);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.card:hover::before { opacity: 1; }

.card-gold {
  border-color: rgba(244,167,46,0.2);
}

.card-gold::before {
  background: var(--gradient-gold);
}

.card-gold:hover {
  border-color: rgba(244,167,46,0.5);
  box-shadow: var(--shadow-gold);
}

/* ============================================================
   HEADER / NAVBAR
   ============================================================ */
#site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10,22,40,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(41,121,255,0.1);
  transition: all var(--transition-base);
}

#site-header.scrolled {
  background: rgba(10,22,40,0.98);
  box-shadow: 0 4px 30px rgba(0,0,0,0.5);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 0.5rem;
  overflow: visible;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
  flex-shrink: 0;
}

.logo-icon {
  width: 42px;
  height: 42px;
  background: var(--gradient-accent);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.logo-name {
  font-size: var(--font-size-lg);
  font-weight: 800;
  color: var(--color-white);
  letter-spacing: -0.03em;
}

.logo-sub {
  font-size: var(--font-size-xs);
  color: var(--color-accent);
  font-weight: 500;
  letter-spacing: 0.05em;
}

/* Nav Menu */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 0;
  flex: 1;
  justify-content: center;
  min-width: 0;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  padding: 0.45rem 0.45rem;
  border-radius: var(--radius-md);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--color-gray-200);
  transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-white);
  background: rgba(41,121,255,0.12);
}

.nav-link.active { color: var(--color-accent); }

/* Dropdown */
.nav-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  width: 260px;
  background: var(--color-navy-mid);
  border: 1px solid rgba(41,121,255,0.2);
  border-radius: var(--radius-lg);
  padding: var(--spacing-sm);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  z-index: 100;
}

.nav-item:hover .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 0.6rem 0.875rem;
  border-radius: var(--radius-md);
  color: var(--color-gray-200);
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
}

.dropdown-item:hover {
  color: var(--color-white);
  background: rgba(41,121,255,0.15);
}

.dropdown-item .icon { font-size: 1rem; opacity: 0.8; }

/* Wide dropdown for multi-group nav */
.nav-dropdown-wide { width: 300px; }

/* Mega dropdown — 3 columnas para Módulos */
.nav-dropdown-mega {
  width: 720px;
  left: 50%;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0 0.5rem;
  padding: 1rem;
}

.nav-dropdown-mega .dropdown-group-label {
  grid-column: span 1;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  padding: 0.4rem 0.5rem 0.2rem;
  margin-top: 0.25rem;
}

.nav-dropdown-mega .dropdown-divider {
  display: none;
}

.nav-dropdown-mega .dropdown-col {
  display: flex;
  flex-direction: column;
}

.nav-dropdown-mega .dropdown-item {
  padding: 0.45rem 0.5rem;
  font-size: 0.78rem;
}

.dropdown-group-label {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-gold);
  padding: 0.5rem 0.875rem 0.25rem;
  margin-top: 0.25rem;
}

.dropdown-divider {
  height: 1px;
  background: rgba(255,255,255,0.06);
  margin: 0.4rem 0.875rem;
}

/* Mobile nav groups */
.mobile-group { padding: 0; }
.mobile-group-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-gold);
  padding: 0.75rem 1.5rem 0.3rem;
  opacity: 0.9;
}
.mobile-group ul { padding-left: 1rem; }
.mobile-group ul .mobile-nav-link { font-size: 0.85rem; padding: 0.5rem 1.5rem; }

/* Nav Right */
.nav-right {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-shrink: 0;
}

/* Language Toggle — botón único compacto */
.lang-toggle {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.3rem 0.6rem;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-full);
  color: var(--color-white);
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
  white-space: nowrap;
  font-size: 0.75rem;
  font-weight: 600;
}

.lang-toggle:hover {
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.2);
}

#lang-flag-active {
  font-size: 1.1rem;
  line-height: 1;
}

#lang-name-active {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

/* Ocultar clases antiguas si quedan */
.lang-selector { display: none; }
.lang-btn, .lang-flag, .lang-code { display: none; }

/* User Menu */
.user-menu-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 0.4rem 0.875rem;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-full);
  color: var(--color-white);
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: all var(--transition-base);
}

.user-menu-btn:hover {
  background: rgba(41,121,255,0.15);
  border-color: rgba(41,121,255,0.3);
}

.user-avatar {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-full);
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xs);
  font-weight: 700;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Mobile Menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-navy-mid);
  z-index: 999;
  overflow-y: auto;
  padding: var(--spacing-lg);
  transform: translateX(100%);
  transition: transform var(--transition-base);
}

.mobile-menu.open {
  display: block;
  transform: translateX(0);
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  border-radius: var(--radius-lg);
  color: var(--color-gray-200);
  font-size: var(--font-size-lg);
  font-weight: 500;
  transition: all var(--transition-fast);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.mobile-nav-link:hover { color: var(--color-white); background: rgba(41,121,255,0.1); }

/* ============================================================
   HERO SECTION
   ============================================================ */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background: var(--gradient-hero);
  padding-top: 72px;
}

/* Animated Background */
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(41,121,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(41,121,255,0.05) 1px, transparent 1px);
  background-size: 60px 60px;
  animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
  0% { transform: translate(0, 0); }
  100% { transform: translate(60px, 60px); }
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.3;
  animation: pulse 4s ease-in-out infinite;
}

.hero-glow-1 {
  width: 600px;
  height: 600px;
  background: rgba(41,121,255,0.4);
  top: -200px;
  right: -100px;
}

.hero-glow-2 {
  width: 400px;
  height: 400px;
  background: rgba(0,198,255,0.3);
  bottom: -100px;
  left: -50px;
  animation-delay: -2s;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.3; }
  50% { transform: scale(1.1); opacity: 0.4; }
}

/* Radar Animation */
.radar-container {
  position: absolute;
  right: 5%;
  top: 50%;
  transform: translateY(-50%);
  width: 500px;
  height: 500px;
  opacity: 0.18;
}

.radar-circle {
  position: absolute;
  border-radius: 50%;
  border: 1px solid var(--color-accent);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.radar-circle:nth-child(1) { width: 100px; height: 100px; }
.radar-circle:nth-child(2) { width: 200px; height: 200px; }
.radar-circle:nth-child(3) { width: 300px; height: 300px; }
.radar-circle:nth-child(4) { width: 400px; height: 400px; }
.radar-circle:nth-child(5) { width: 500px; height: 500px; }

.radar-line {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 250px;
  height: 2px;
  background: linear-gradient(90deg, rgba(41,121,255,0.8), transparent);
  transform-origin: left center;
  animation: radarSweep 4s linear infinite;
}

@keyframes radarSweep {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.radar-cross {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 500px;
  height: 500px;
}

.radar-cross::before,
.radar-cross::after {
  content: '';
  position: absolute;
  background: rgba(41,121,255,0.3);
}

.radar-cross::before {
  width: 1px;
  height: 100%;
  left: 50%;
}

.radar-cross::after {
  width: 100%;
  height: 1px;
  top: 50%;
}

/* Hero Content */
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 680px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  background: rgba(41,121,255,0.12);
  border: 1px solid rgba(41,121,255,0.3);
  border-radius: var(--radius-full);
  padding: 0.4rem 1rem;
  margin-bottom: var(--spacing-xl);
  font-size: var(--font-size-sm);
  color: var(--color-accent);
  font-weight: 500;
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  background: var(--color-success);
  border-radius: 50%;
  animation: blink 2s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: var(--spacing-lg);
  letter-spacing: -0.03em;
}

.hero-title span { display: block; }

.hero-desc {
  font-size: var(--font-size-lg);
  color: var(--color-gray-200);
  line-height: 1.7;
  margin-bottom: var(--spacing-2xl);
  max-width: 560px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-2xl);
}

/* Hero Stats */
.hero-stats {
  display: flex;
  gap: var(--spacing-2xl);
  flex-wrap: wrap;
}

.hero-stat {
  display: flex;
  flex-direction: column;
}

.stat-value {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.stat-label {
  font-size: var(--font-size-xs);
  color: var(--color-gray-400);
  font-weight: 500;
  margin-top: 0.25rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ============================================================
   TRUST BAR
   ============================================================ */
#trust-bar {
  background: rgba(17,34,64,0.8);
  border-top: 1px solid rgba(41,121,255,0.1);
  border-bottom: 1px solid rgba(41,121,255,0.1);
  padding: var(--spacing-md) 0;
}

.trust-items {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--spacing-xl);
}

.trust-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--color-gray-400);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

.trust-item .icon {
  color: var(--color-accent);
  font-size: 1rem;
}

/* ============================================================
   SECTION HEADERS
   ============================================================ */
.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-header .label-tag {
  margin-bottom: var(--spacing-md);
}

.section-header h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  margin-bottom: var(--spacing-md);
}

.section-header p {
  font-size: var(--font-size-lg);
  color: var(--color-gray-400);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ============================================================
   MODULES SECTION
   ============================================================ */
#modules { background: var(--color-navy); }

.modules-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  justify-content: center;
  margin-bottom: var(--spacing-2xl);
}

.tab-btn {
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-gray-400);
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  transition: all var(--transition-base);
}

.tab-btn:hover { color: var(--color-white); background: rgba(41,121,255,0.1); }

.tab-btn.active {
  color: var(--color-white);
  background: var(--gradient-accent);
  border-color: transparent;
}

.modules-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--spacing-xl);
}

.module-card {
  background: var(--gradient-card);
  border: 1px solid rgba(41,121,255,0.15);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-base);
  cursor: pointer;
  position: relative;
}

.module-card:hover {
  transform: translateY(-6px);
  border-color: rgba(41,121,255,0.4);
  box-shadow: var(--shadow-glow);
}

.module-card-header {
  padding: var(--spacing-xl);
  position: relative;
}

.module-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: var(--spacing-md);
}

.module-icon.blue { background: rgba(41,121,255,0.15); border: 1px solid rgba(41,121,255,0.3); }
.module-icon.gold { background: rgba(244,167,46,0.12); border: 1px solid rgba(244,167,46,0.25); }
.module-icon.teal { background: rgba(0,201,167,0.12); border: 1px solid rgba(0,201,167,0.25); }
.module-icon.purple { background: rgba(160,80,255,0.12); border: 1px solid rgba(160,80,255,0.25); }

.module-badge {
  position: absolute;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  font-size: var(--font-size-xs);
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
}

.badge-new { background: rgba(0,201,167,0.15); color: var(--color-success); border: 1px solid rgba(0,201,167,0.3); }
.badge-popular { background: rgba(244,167,46,0.15); color: var(--color-gold); border: 1px solid rgba(244,167,46,0.3); }
.badge-pro { background: rgba(41,121,255,0.15); color: var(--color-sky); border: 1px solid rgba(41,121,255,0.3); }
.badge-locked { background: rgba(255,82,82,0.15); color: var(--color-danger); border: 1px solid rgba(255,82,82,0.3); }

.module-card h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-sm);
}

.module-card p {
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
  line-height: 1.6;
}

.module-card-footer {
  padding: var(--spacing-md) var(--spacing-xl);
  border-top: 1px solid rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.module-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.meta-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--font-size-xs);
  color: var(--color-gray-400);
}

/* Progress Bar */
.progress-bar-wrapper {
  margin-top: var(--spacing-md);
}

.progress-label {
  display: flex;
  justify-content: space-between;
  font-size: var(--font-size-xs);
  color: var(--color-gray-400);
  margin-bottom: 0.3rem;
}

.progress-bar {
  height: 6px;
  background: rgba(255,255,255,0.08);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--gradient-accent);
  border-radius: var(--radius-full);
  transition: width 1s ease;
}

.progress-fill.gold { background: var(--gradient-gold); }
.progress-fill.success { background: linear-gradient(90deg, var(--color-success), #00ffcc); }

/* ============================================================
   QUIZ SECTION
   ============================================================ */
#quiz-preview {
  background: var(--color-navy-mid);
}

.quiz-container {
  max-width: 800px;
  margin: 0 auto;
}

.quiz-card {
  background: var(--gradient-card);
  border: 1px solid rgba(41,121,255,0.2);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
}

.quiz-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.quiz-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.quiz-counter {
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
}

.quiz-timer {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  background: rgba(255,82,82,0.12);
  border: 1px solid rgba(255,82,82,0.2);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-danger);
}

.question-text {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-xl);
  line-height: 1.5;
}

.answer-options {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.answer-option {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  border: 2px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-base);
  background: rgba(255,255,255,0.02);
}

.answer-option:hover {
  border-color: rgba(41,121,255,0.4);
  background: rgba(41,121,255,0.07);
}

.answer-option.selected {
  border-color: var(--color-sky);
  background: rgba(41,121,255,0.1);
}

.answer-option.correct {
  border-color: var(--color-success);
  background: rgba(0,201,167,0.1);
}

.answer-option.incorrect {
  border-color: var(--color-danger);
  background: rgba(255,82,82,0.1);
}

.option-letter {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: 700;
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.answer-option.selected .option-letter { background: var(--color-sky); color: var(--color-white); }
.answer-option.correct .option-letter { background: var(--color-success); color: var(--color-white); }
.answer-option.incorrect .option-letter { background: var(--color-danger); color: var(--color-white); }

.option-text {
  font-size: var(--font-size-base);
  line-height: 1.5;
  padding-top: 0.3rem;
}

.quiz-explanation {
  background: rgba(0,201,167,0.08);
  border: 1px solid rgba(0,201,167,0.2);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-top: var(--spacing-md);
}

.quiz-explanation.incorrect {
  background: rgba(255,82,82,0.08);
  border-color: rgba(255,82,82,0.2);
}

.quiz-explanation h4 {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-success);
  margin-bottom: var(--spacing-sm);
}

.quiz-explanation.incorrect h4 { color: var(--color-danger); }

.quiz-explanation p {
  font-size: var(--font-size-sm);
  color: var(--color-gray-200);
  line-height: 1.6;
}

/* ============================================================
   FEATURES SECTION
   ============================================================ */
#features {
  background: linear-gradient(180deg, var(--color-navy) 0%, var(--color-navy-mid) 100%);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-xl);
}

.feature-card {
  padding: var(--spacing-xl);
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
}

.feature-card:hover {
  background: rgba(41,121,255,0.06);
  border-color: rgba(41,121,255,0.2);
  transform: translateY(-4px);
}

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-lg);
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: var(--spacing-lg);
  box-shadow: 0 4px 16px rgba(41,121,255,0.3);
}

.feature-card h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-sm);
}

.feature-card p {
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
  line-height: 1.6;
}

/* ============================================================
   DASHBOARD PREVIEW
   ============================================================ */
#dashboard-preview {
  background: var(--color-navy);
}

.dashboard-container {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--spacing-xl);
  background: var(--gradient-card);
  border: 1px solid rgba(41,121,255,0.15);
  border-radius: var(--radius-xl);
  overflow: hidden;
  min-height: 500px;
}

.dashboard-sidebar {
  background: rgba(10,22,40,0.6);
  padding: var(--spacing-xl);
  border-right: 1px solid rgba(41,121,255,0.1);
}

.dash-user {
  text-align: center;
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  margin-bottom: var(--spacing-lg);
}

.dash-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  font-weight: 700;
  margin: 0 auto var(--spacing-sm);
}

.dash-name {
  font-size: var(--font-size-base);
  font-weight: 600;
}

.dash-role {
  font-size: var(--font-size-xs);
  color: var(--color-accent);
  margin-top: 0.2rem;
}

.dash-nav-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 0.6rem 0.875rem;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-bottom: 0.25rem;
}

.dash-nav-item:hover { background: rgba(41,121,255,0.1); color: var(--color-white); }
.dash-nav-item.active { background: rgba(41,121,255,0.15); color: var(--color-accent); }

.dashboard-main {
  padding: var(--spacing-xl);
}

.dash-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.dash-stat-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  text-align: center;
}

.dash-stat-value {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  line-height: 1;
  margin-bottom: 0.25rem;
}

.dash-stat-label {
  font-size: var(--font-size-xs);
  color: var(--color-gray-400);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ============================================================
   TESTIMONIALS
   ============================================================ */
#testimonials {
  background: var(--color-navy-mid);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

.testimonial-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  transition: all var(--transition-base);
}

.testimonial-card:hover {
  border-color: rgba(41,121,255,0.2);
  transform: translateY(-4px);
}

.testimonial-stars {
  display: flex;
  gap: 2px;
  margin-bottom: var(--spacing-md);
  color: var(--color-gold);
}

.testimonial-text {
  font-size: var(--font-size-base);
  color: var(--color-gray-200);
  line-height: 1.7;
  margin-bottom: var(--spacing-lg);
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--font-size-base);
  flex-shrink: 0;
}

.author-name {
  font-size: var(--font-size-sm);
  font-weight: 600;
}

.author-role {
  font-size: var(--font-size-xs);
  color: var(--color-gray-400);
}

/* ============================================================
   CTA SECTION
   ============================================================ */
#cta-section {
  background: linear-gradient(135deg, var(--color-blue) 0%, var(--color-navy-mid) 100%);
  position: relative;
  overflow: hidden;
}

#cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
}

.cta-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.cta-content h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: var(--spacing-lg);
}

.cta-content p {
  font-size: var(--font-size-lg);
  color: var(--color-gray-200);
  margin-bottom: var(--spacing-2xl);
}

/* ============================================================
   FOOTER
   ============================================================ */
footer {
  background: var(--color-navy);
  border-top: 1px solid rgba(255,255,255,0.05);
  padding: var(--spacing-4xl) 0 var(--spacing-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-brand p {
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
  line-height: 1.7;
  margin-top: var(--spacing-md);
  max-width: 280px;
}

.footer-col h4 {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-white);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--spacing-lg);
}

.footer-links li { margin-bottom: 0.6rem; }

.footer-links a {
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
  transition: color var(--transition-fast);
}

.footer-links a:hover { color: var(--color-accent); }

.footer-bottom {
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer-bottom p {
  font-size: var(--font-size-xs);
  color: var(--color-gray-400);
}

.footer-legal-links {
  display: flex;
  gap: var(--spacing-lg);
}

.footer-legal-links a {
  font-size: var(--font-size-xs);
  color: var(--color-gray-400);
}

.footer-legal-links a:hover { color: var(--color-accent); }

/* ============================================================
   MODALS
   ============================================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  backdrop-filter: blur(8px);
  z-index: 9000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.modal-overlay.open {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--color-navy-mid);
  border: 1px solid rgba(41,121,255,0.2);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.95) translateY(20px);
  transition: transform var(--transition-base);
}

.modal-overlay.open .modal {
  transform: scale(1) translateY(0);
}

.modal-lg { max-width: 760px; }
.modal-xl { max-width: 900px; }

.modal-header {
  padding: var(--spacing-xl);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-header h2 {
  font-size: var(--font-size-xl);
}

.modal-close {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gray-400);
  font-size: 1.2rem;
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background: rgba(255,82,82,0.15);
  color: var(--color-danger);
}

.modal-body { padding: var(--spacing-xl); }

.modal-footer {
  padding: var(--spacing-lg) var(--spacing-xl);
  border-top: 1px solid rgba(255,255,255,0.06);
  display: flex;
  gap: var(--spacing-md);
  justify-content: flex-end;
}

/* Auth Modal */
.auth-tabs {
  display: flex;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  margin-bottom: var(--spacing-xl);
}

.auth-tab {
  flex: 1;
  padding: 0.875rem;
  text-align: center;
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-gray-400);
  background: transparent;
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
  margin-bottom: -1px;
}

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

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-gray-200);
  margin-bottom: 0.5rem;
}

.form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  background: rgba(255,255,255,0.04);
  border: 1.5px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  color: var(--color-white);
  font-size: var(--font-size-base);
  transition: all var(--transition-fast);
}

.form-input::placeholder { color: var(--color-gray-400); }

.form-input:focus {
  border-color: var(--color-sky);
  background: rgba(41,121,255,0.06);
  box-shadow: 0 0 0 3px rgba(41,121,255,0.12);
}

.form-input.error { border-color: var(--color-danger); }

.form-error {
  display: none;
  font-size: var(--font-size-xs);
  color: var(--color-danger);
  margin-top: 0.3rem;
}

.form-error.visible { display: block; }

.checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
}

.checkbox-group input[type="checkbox"] {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 2px;
  accent-color: var(--color-sky);
}

.checkbox-group label {
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
  line-height: 1.5;
}

.checkbox-group a { color: var(--color-accent); }

/* Legal Modal */
.legal-content {
  font-size: var(--font-size-sm);
  color: var(--color-gray-200);
  line-height: 1.8;
}

.legal-content h3 {
  font-size: var(--font-size-base);
  color: var(--color-white);
  margin: var(--spacing-lg) 0 var(--spacing-sm);
}

.legal-content ul {
  list-style: disc;
  padding-left: var(--spacing-lg);
}

.legal-content ul li { margin-bottom: 0.5rem; }

.legal-accept-bar {
  background: rgba(0,201,167,0.08);
  border: 1px solid rgba(0,201,167,0.2);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

/* Disclaimer Banner */
.disclaimer-banner {
  background: rgba(244,167,46,0.08);
  border: 1px solid rgba(244,167,46,0.25);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.disclaimer-banner .icon {
  color: var(--color-gold);
  font-size: 1.2rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.disclaimer-banner p {
  font-size: var(--font-size-xs);
  color: var(--color-gray-300);
  line-height: 1.6;
}

/* ============================================================
   BREADCRUMBS
   ============================================================ */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  flex-wrap: wrap;
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
  margin-bottom: var(--spacing-lg);
}

.breadcrumbs a { color: var(--color-gray-400); }
.breadcrumbs a:hover { color: var(--color-accent); }
.breadcrumbs .separator { color: var(--color-gray-600); }
.breadcrumbs .current { color: var(--color-white); }

/* ============================================================
   SEARCH BAR
   ============================================================ */
.search-wrapper {
  position: relative;
  max-width: 500px;
}

.search-input {
  width: 100%;
  padding: 0.75rem 1rem 0.75rem 3rem;
  background: rgba(255,255,255,0.05);
  border: 1.5px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-full);
  color: var(--color-white);
  font-size: var(--font-size-base);
  transition: all var(--transition-fast);
}

.search-input:focus {
  border-color: var(--color-sky);
  background: rgba(41,121,255,0.06);
  outline: none;
}

.search-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-gray-400);
  font-size: 1rem;
}

/* ============================================================
   PAGE HEADER (Inner Pages)
   ============================================================ */
.page-hero {
  padding: calc(72px + 3rem) 0 var(--spacing-3xl);
  background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-blue) 100%);
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(41,121,255,0.04) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(41,121,255,0.04) 1px, transparent 1px);
  background-size: 50px 50px;
}

.page-hero .container { position: relative; z-index: 1; }

.page-hero h1 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  margin-bottom: var(--spacing-md);
}

.page-hero p {
  font-size: var(--font-size-lg);
  color: var(--color-gray-200);
  max-width: 600px;
  line-height: 1.7;
}

/* ============================================================
   NOTIFICATIONS
   ============================================================ */
.notification-toast {
  position: fixed;
  bottom: var(--spacing-xl);
  right: var(--spacing-xl);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  max-width: 380px;
}

.toast {
  background: var(--color-navy-mid);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  box-shadow: var(--shadow-lg);
  border-left: 3px solid var(--color-accent);
  transform: translateX(120%);
  transition: transform var(--transition-base);
}

.toast.show { transform: translateX(0); }
.toast.success { border-left-color: var(--color-success); }
.toast.error { border-left-color: var(--color-danger); }
.toast.warning { border-left-color: var(--color-gold); }

.toast-icon { font-size: 1.2rem; }
.toast-msg { font-size: var(--font-size-sm); flex: 1; }

/* ============================================================
   BACK TO TOP
   ============================================================ */
#back-to-top {
  position: fixed;
  bottom: var(--spacing-xl);
  left: var(--spacing-xl);
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--gradient-accent);
  color: var(--color-white);
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: var(--shadow-md);
  z-index: 900;
  transition: all var(--transition-base);
}

#back-to-top.visible {
  display: flex;
}

#back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

/* ============================================================
   GUEST OVERLAY (Content Restriction)
   ============================================================ */
.guest-overlay {
  position: relative;
}

.guest-overlay-content {
  filter: blur(4px);
  pointer-events: none;
  user-select: none;
}

.guest-cta {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 10;
  text-align: center;
  background: linear-gradient(transparent, rgba(10,22,40,0.95));
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
}

.guest-cta .lock-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  color: var(--color-gold);
}

.guest-cta h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-sm);
}

.guest-cta p {
  color: var(--color-gray-400);
  margin-bottom: var(--spacing-lg);
  max-width: 400px;
}

/* ============================================================
   ANIMATIONS
   ============================================================ */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }
.fade-in-delay-4 { transition-delay: 0.4s; }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.float-animation { animation: float 4s ease-in-out infinite; }

@keyframes shimmer {
  from { background-position: -200% center; }
  to { background-position: 200% center; }
}

.shimmer {
  background: linear-gradient(90deg, rgba(255,255,255,0.05) 0%, rgba(255,255,255,0.1) 50%, rgba(255,255,255,0.05) 100%);
  background-size: 200% auto;
  animation: shimmer 2s linear infinite;
}

/* ============================================================
   RESPONSIVE DESIGN
   ============================================================ */

/* Tablet (1024px) */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--spacing-xl); }
  .dashboard-container { grid-template-columns: 1fr; }
  .dashboard-sidebar { border-right: none; border-bottom: 1px solid rgba(41,121,255,0.1); }
  .dash-stats { grid-template-columns: repeat(3, 1fr); }
  .radar-container { width: 350px; height: 350px; opacity: 0.12; }
}

/* Navbar colapsa a hamburger en pantallas menores a 1200px */
@media (max-width: 1200px) {
  .nav-menu { display: none; }
  .hamburger { display: flex; }
  .navbar { gap: 0.5rem; }
  .nav-right { gap: 0.4rem; }
  /* Ocultar botones de login/register en tablet, solo banderas + hamburger */
  #auth-nav-buttons { display: none; }
  #user-nav-menu .user-menu-btn span,
  #user-nav-menu .fa-chevron-down { display: none; }
}

/* Tablet Portrait (768px) */
@media (max-width: 768px) {
  :root { --font-size-6xl: 2.5rem; --font-size-5xl: 2rem; }
  
  .container { padding: 0 var(--spacing-lg); }
  
  .nav-menu { display: none; }
  .hamburger { display: flex; }
  .lang-code { display: inline; }
  
  .hero-stats { gap: var(--spacing-xl); }
  
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  
  .modules-grid { grid-template-columns: 1fr; }
  
  .footer-grid { grid-template-columns: 1fr; }
  
  .dash-stats { grid-template-columns: 1fr; }
  
  .modal { max-height: 95vh; }
  
  .radar-container { display: none; }
  
  .features-grid { grid-template-columns: 1fr; }
  
  .testimonials-grid { grid-template-columns: 1fr; }
  
  .hero-actions { flex-direction: column; align-items: flex-start; }
}

/* Mobile (480px) */
@media (max-width: 480px) {
  .container { padding: 0 var(--spacing-md); }
  
  .section { padding: var(--spacing-2xl) 0; }
  
  .hero-title { font-size: 2rem; }
  
  .btn-xl { padding: 0.9rem 2rem; font-size: var(--font-size-base); }
  
  .notification-toast { left: var(--spacing-md); right: var(--spacing-md); max-width: 100%; }
  
  .trust-items { gap: var(--spacing-md); }
  
  .hero-stats { flex-direction: column; gap: var(--spacing-lg); }
}

/* Small Mobile (320px) */
@media (max-width: 360px) {
  :root { font-size: 14px; }
  .navbar { height: 60px; }
  .mobile-menu { top: 60px; }
}

/* Large Screens */
@media (min-width: 1400px) {
  .container { max-width: 1360px; }
}

@media (min-width: 2000px) {
  html { font-size: 18px; }
  .container { max-width: 1600px; }
}

/* ============================================================
   PRINT STYLES
   ============================================================ */
@media print {
  #site-header, footer, #back-to-top, .notification-toast { display: none; }
  body { background: white; color: black; }
}