/* ============================================================
   GoRusky — Design System & Global Styles
   Plataforma educativa para aprender ruso
   ============================================================ */

/* ============================================================
   1. GOOGLE FONTS
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Outfit:wght@400;500;600;700;800;900&display=swap');

/* ============================================================
   2. CSS CUSTOM PROPERTIES (Design Tokens)
   ============================================================ */
:root {
  /* — Primary Colors — */
  --color-primary: #1a73e8;
  --color-primary-dark: #0d47a1;
  --color-primary-light: #4fc3f7;
  --color-primary-lighter: #e3f2fd;
  --color-primary-subtle: #f0f7ff;

  /* — Accent — */
  --color-accent: #ff7043;
  --color-accent-dark: #e64a19;
  --color-accent-light: #ffab91;

  /* — Success / Warning / Error — */
  --color-success: #34a853;
  --color-success-light: #e8f5e9;
  --color-warning: #fbbc04;
  --color-warning-light: #fff8e1;
  --color-error: #ea4335;
  --color-error-light: #fce8e6;

  /* — Neutrals — */
  --color-white: #ffffff;
  --color-gray-50: #f8f9fa;
  --color-gray-100: #f1f3f4;
  --color-gray-200: #e8eaed;
  --color-gray-300: #dadce0;
  --color-gray-400: #bdc1c6;
  --color-gray-500: #9aa0a6;
  --color-gray-600: #80868b;
  --color-gray-700: #5f6368;
  --color-gray-800: #3c4043;
  --color-gray-900: #202124;
  --color-black: #1a1a2e;

  /* — Backgrounds — */
  --bg-primary: var(--color-white);
  --bg-secondary: var(--color-gray-50);
  --bg-tertiary: var(--color-gray-100);
  --bg-card: var(--color-white);

  /* — Text — */
  --text-primary: var(--color-gray-900);
  --text-secondary: var(--color-gray-700);
  --text-tertiary: var(--color-gray-500);
  --text-inverse: var(--color-white);

  /* — Typography — */
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;

  --leading-tight: 1.2;
  --leading-normal: 1.5;
  --leading-relaxed: 1.7;

  /* — Spacing — */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* — Borders — */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  --border-color: var(--color-gray-200);
  --border-light: 1px solid var(--color-gray-200);

  /* — Shadows — */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12);
  --shadow-primary: 0 4px 16px rgba(26, 115, 232, 0.3);
  --shadow-accent: 0 4px 16px rgba(255, 112, 67, 0.3);

  /* — Transitions — */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
  --transition-spring: 400ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* — Layout — */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1200px;
  --container-2xl: 1400px;
  --header-height: 72px;

  /* — Z-Index — */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 300;
  --z-modal: 400;
  --z-toast: 500;
}

/* ============================================================
   3. RESET & BASE
   ============================================================ */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: calc(var(--header-height) + var(--space-4));
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-dark);
}

ul,
ol {
  list-style: none;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
  border: none;
  outline: none;
  background: none;
}

button {
  cursor: pointer;
}

table {
  border-collapse: collapse;
  width: 100%;
}

/* — Skip to content (Accessibility) — */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  background: var(--color-primary);
  color: var(--text-inverse);
  padding: var(--space-3) var(--space-6);
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  z-index: var(--z-toast);
  font-weight: 600;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0;
  color: var(--text-inverse);
}

/* ============================================================
   4. TYPOGRAPHY
   ============================================================ */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: var(--leading-tight);
  color: var(--text-primary);
}

h1 {
  font-size: var(--text-5xl);
  font-weight: 800;
  letter-spacing: -0.02em;
}

h2 {
  font-size: var(--text-4xl);
  font-weight: 700;
  letter-spacing: -0.01em;
}

h3 {
  font-size: var(--text-2xl);
  font-weight: 700;
}

h4 {
  font-size: var(--text-xl);
  font-weight: 600;
}

h5 {
  font-size: var(--text-lg);
  font-weight: 600;
}

h6 {
  font-size: var(--text-base);
  font-weight: 600;
}

p {
  line-height: var(--leading-relaxed);
  color: var(--text-secondary);
}

.text-gradient {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.text-sm {
  font-size: var(--text-sm);
}

.text-lg {
  font-size: var(--text-lg);
}

.text-xl {
  font-size: var(--text-xl);
}

/* ============================================================
   5. LAYOUT
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container-sm {
  max-width: var(--container-md);
}

.container-lg {
  max-width: var(--container-2xl);
}

.section {
  padding: var(--space-20) 0;
}

.section-sm {
  padding: var(--space-12) 0;
}

.section-lg {
  padding: var(--space-24) 0;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-12);
}

.section-header p {
  margin-top: var(--space-4);
  font-size: var(--text-lg);
}

.grid {
  display: grid;
  gap: var(--space-6);
}

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

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

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

.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.flex-col {
  display: flex;
  flex-direction: column;
}

.gap-2 {
  gap: var(--space-2);
}

.gap-3 {
  gap: var(--space-3);
}

.gap-4 {
  gap: var(--space-4);
}

.gap-6 {
  gap: var(--space-6);
}

.gap-8 {
  gap: var(--space-8);
}

/* — Page layout with sidebar — */
.page-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: var(--space-8);
  align-items: start;
}

.page-content {
  min-width: 0;
}

.page-sidebar {
  position: sticky;
  top: calc(var(--header-height) + var(--space-6));
}

/* ============================================================
   6. HEADER / NAVBAR
   ============================================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-gray-200);
  z-index: var(--z-sticky);
  transition: box-shadow var(--transition-base);
}

.header.scrolled {
  box-shadow: var(--shadow-sm);
}

.header .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* — Logo — */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--text-primary);
  text-decoration: none;
}

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

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-inverse);
  font-size: var(--text-lg);
  font-weight: 800;
}

.logo span {
  color: var(--color-primary);
}

/* — Navigation — */
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-link {
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--color-primary);
  background: var(--color-primary-lighter);
}

.nav-link.active {
  color: var(--color-primary);
  background: var(--color-primary-lighter);
  font-weight: 600;
}

/* — Header Actions — */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* — Mobile Menu Toggle — */
.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast);
}

.menu-toggle:hover {
  background: var(--color-gray-100);
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
  position: relative;
}

.menu-toggle span::before,
.menu-toggle span::after {
  content: '';
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.menu-toggle span::before {
  top: -6px;
}

.menu-toggle span::after {
  top: 6px;
}

/* Menu toggle animation */
.menu-toggle.active span {
  background: transparent;
}

.menu-toggle.active span::before {
  top: 0;
  transform: rotate(45deg);
}

.menu-toggle.active span::after {
  top: 0;
  transform: rotate(-45deg);
}

/* ============================================================
   7. BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.1);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.btn:hover::after {
  opacity: 1;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--text-inverse);
  box-shadow: var(--shadow-primary);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  color: var(--text-inverse);
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(26, 115, 232, 0.4);
}

.btn-accent {
  background: var(--color-accent);
  color: var(--text-inverse);
  box-shadow: var(--shadow-accent);
}

.btn-accent:hover {
  background: var(--color-accent-dark);
  color: var(--text-inverse);
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(255, 112, 67, 0.4);
}

.btn-outline {
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
  background: transparent;
}

.btn-outline:hover {
  background: var(--color-primary);
  color: var(--text-inverse);
  transform: translateY(-2px);
}

.btn-ghost {
  color: var(--text-secondary);
  background: transparent;
}

.btn-ghost:hover {
  background: var(--color-gray-100);
  color: var(--text-primary);
}

.btn-white {
  background: var(--color-white);
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  color: var(--color-primary);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
  border-radius: var(--radius-full);
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
}

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-full);
}

/* ============================================================
   8. CARDS
   ============================================================ */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  padding: var(--space-6);
  transition: all var(--transition-base);
}

.card:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.card-flat {
  border: none;
  background: var(--bg-secondary);
}

.card-flat:hover {
  background: var(--color-primary-lighter);
  box-shadow: none;
}

/* — Course Card — */
.course-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.course-card .card-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-2xl);
  background: var(--color-primary-lighter);
}

.course-card .card-level {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  background: var(--color-primary-lighter);
  color: var(--color-primary);
  width: fit-content;
}

.course-card h3 {
  font-size: var(--text-xl);
}

.course-card p {
  font-size: var(--text-sm);
  flex-grow: 1;
}

.course-card .card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--text-sm);
  color: var(--text-tertiary);
}

/* — Feature Card — */
.feature-card {
  text-align: center;
  padding: var(--space-8);
}

.feature-card .feature-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin: 0 auto var(--space-5);
  background: var(--color-primary-lighter);
  transition: all var(--transition-base);
}

.feature-card:hover .feature-icon {
  background: var(--color-primary);
  transform: scale(1.1) rotate(-5deg);
}

.feature-card:hover .feature-icon span {
  filter: brightness(10);
}

.feature-card h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
}

.feature-card p {
  font-size: var(--text-sm);
}

/* — Blog Card — */
.blog-card {
  overflow: hidden;
  padding: 0;
}

.blog-card .card-image {
  height: 200px;
  background: linear-gradient(135deg, var(--color-primary-lighter), var(--color-primary-subtle));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  overflow: hidden;
}

.blog-card .card-body {
  padding: var(--space-6);
}

.blog-card .card-category {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-2);
}

.blog-card h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
}

.blog-card p {
  font-size: var(--text-sm);
  margin-bottom: var(--space-4);
}

.blog-card .card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--text-xs);
  color: var(--text-tertiary);
}

/* — Stat Card — */
.stat-card {
  text-align: center;
  padding: var(--space-8);
  background: var(--bg-secondary);
  border: none;
}

.stat-card:hover {
  background: var(--color-primary-lighter);
}

.stat-number {
  font-family: var(--font-heading);
  font-size: var(--text-4xl);
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  font-weight: 500;
}

/* — Game Card — */
.game-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-8);
}

.game-card .game-icon {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
  margin-bottom: var(--space-5);
  transition: transform var(--transition-spring);
}

.game-card:hover .game-icon {
  transform: scale(1.15) rotate(-8deg);
}

.game-card h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-2);
}

.game-card p {
  font-size: var(--text-sm);
  margin-bottom: var(--space-4);
}

/* — Achievement Card — */
.achievement-card {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-5);
}

.achievement-card.locked {
  opacity: 0.5;
  filter: grayscale(0.8);
}

.achievement-card .achievement-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
}

.achievement-card .achievement-info h4 {
  font-size: var(--text-base);
  margin-bottom: var(--space-1);
}

.achievement-card .achievement-info p {
  font-size: var(--text-sm);
}

/* ============================================================
   9. BADGES & CHIPS
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  background: var(--color-primary-lighter);
  color: var(--color-primary);
}

.badge-success {
  background: var(--color-success-light);
  color: var(--color-success);
}

.badge-warning {
  background: var(--color-warning-light);
  color: #f57c00;
}

.badge-accent {
  background: #fbe9e7;
  color: var(--color-accent-dark);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 500;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.chip:hover,
.chip.active {
  border-color: var(--color-primary);
  background: var(--color-primary-lighter);
  color: var(--color-primary);
}

/* ============================================================
   10. PROGRESS BARS
   ============================================================ */
.progress {
  width: 100%;
  height: 8px;
  background: var(--color-gray-200);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
  position: relative;
}

.progress-bar::after {
  content: '';
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 20px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3));
  border-radius: var(--radius-full);
}

.progress-lg {
  height: 12px;
}

.progress-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 500;
}

/* ============================================================
   11. BREADCRUMBS
   ============================================================ */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) 0;
  font-size: var(--text-sm);
  color: var(--text-tertiary);
  flex-wrap: wrap;
}

.breadcrumbs a {
  color: var(--text-tertiary);
  transition: color var(--transition-fast);
}

.breadcrumbs a:hover {
  color: var(--color-primary);
}

.breadcrumbs .separator {
  color: var(--color-gray-400);
  font-size: var(--text-xs);
}

.breadcrumbs .current {
  color: var(--text-primary);
  font-weight: 500;
}

/* ============================================================
   12. FORMS
   ============================================================ */
.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  background: var(--bg-primary);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-lighter);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.form-hint {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  margin-top: var(--space-1);
}

/* ============================================================
   13. TABS
   ============================================================ */
.tabs {
  display: flex;
  gap: var(--space-1);
  border-bottom: 2px solid var(--color-gray-200);
  margin-bottom: var(--space-6);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.tab-btn {
  padding: var(--space-3) var(--space-5);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

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

.tab-btn.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  font-weight: 600;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

/* ============================================================
   14. ACCORDION
   ============================================================ */
.accordion {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.accordion-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-base);
}

.accordion-item:hover {
  border-color: var(--color-primary-light);
}

.accordion-header {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  font-size: var(--text-base);
  font-weight: 600;
  text-align: left;
  background: var(--bg-primary);
  transition: background var(--transition-fast);
}

.accordion-header:hover {
  background: var(--color-gray-50);
}

.accordion-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  background: var(--color-gray-100);
  font-size: var(--text-sm);
  font-weight: 700;
  transition: all var(--transition-base);
  flex-shrink: 0;
}

.accordion-item.active .accordion-icon {
  background: var(--color-primary);
  color: var(--text-inverse);
  transform: rotate(45deg);
}

.accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow), padding var(--transition-slow);
}

.accordion-item.active .accordion-body {
  max-height: 500px;
}

.accordion-content {
  padding: 0 var(--space-6) var(--space-6);
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
}

/* ============================================================
   15. TABLES
   ============================================================ */
.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.table {
  width: 100%;
  border-collapse: collapse;
}

.table th {
  padding: var(--space-4) var(--space-5);
  text-align: left;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-secondary);
  border-bottom: 2px solid var(--border-color);
}

.table td {
  padding: var(--space-4) var(--space-5);
  font-size: var(--text-sm);
  border-bottom: 1px solid var(--color-gray-100);
}

.table tr:last-child td {
  border-bottom: none;
}

.table tr:hover td {
  background: var(--color-gray-50);
}

/* ============================================================
   16. HERO SECTIONS
   ============================================================ */
.hero {
  position: relative;
  padding: calc(var(--header-height) + var(--space-16)) 0 var(--space-16);
  background: linear-gradient(135deg, var(--color-primary-subtle) 0%, var(--bg-primary) 50%, var(--color-primary-lighter) 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--color-primary-lighter) 0%, transparent 70%);
  opacity: 0.6;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--color-primary-lighter) 0%, transparent 70%);
  opacity: 0.4;
  pointer-events: none;
}

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

.hero-content {
  max-width: 650px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-primary-lighter);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-6);
}

.hero h1 {
  margin-bottom: var(--space-6);
  font-size: var(--text-5xl);
}

.hero p {
  font-size: var(--text-xl);
  margin-bottom: var(--space-8);
  color: var(--text-secondary);
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  align-items: center;
  flex-wrap: wrap;
}

.hero-illustration {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.hero-illustration .hero-visual {
  width: 100%;
  max-width: 480px;
  aspect-ratio: 1;
  background: linear-gradient(135deg, var(--color-primary-lighter), var(--color-primary-subtle));
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.hero-visual .cyrillic-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3);
  padding: var(--space-8);
}

.hero-visual .cyrillic-char {
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.8);
  border-radius: var(--radius-md);
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--color-primary);
  backdrop-filter: blur(4px);
  transition: all var(--transition-spring);
  animation: floatChar 3s ease-in-out infinite;
}

.hero-visual .cyrillic-char:nth-child(even) {
  animation-delay: 1.5s;
}

.hero-visual .cyrillic-char:hover {
  transform: scale(1.15) rotate(-5deg);
  background: var(--color-primary);
  color: var(--text-inverse);
}

/* — Page Hero (simpler) — */
.page-hero {
  padding: calc(var(--header-height) + var(--space-12)) 0 var(--space-12);
  background: linear-gradient(135deg, var(--color-primary-subtle), var(--bg-primary));
  text-align: center;
}

.page-hero h1 {
  font-size: var(--text-4xl);
  margin-bottom: var(--space-4);
}

.page-hero p {
  font-size: var(--text-lg);
  max-width: 600px;
  margin: 0 auto;
}

/* ============================================================
   17. TESTIMONIALS
   ============================================================ */
.testimonial-card {
  padding: var(--space-8);
}

.testimonial-stars {
  display: flex;
  gap: var(--space-1);
  margin-bottom: var(--space-4);
  color: var(--color-warning);
  font-size: var(--text-lg);
}

.testimonial-text {
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--text-secondary);
  margin-bottom: var(--space-5);
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-inverse);
  font-weight: 700;
  font-size: var(--text-sm);
}

.testimonial-name {
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--text-primary);
}

.testimonial-role {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
}

/* ============================================================
   18. CTA SECTIONS
   ============================================================ */
.cta-section {
  padding: var(--space-16) 0;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: var(--text-inverse);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  pointer-events: none;
}

.cta-section h2 {
  color: var(--text-inverse);
  margin-bottom: var(--space-4);
}

.cta-section p {
  color: rgba(255, 255, 255, 0.85);
  font-size: var(--text-lg);
  max-width: 600px;
  margin: 0 auto var(--space-8);
}

/* ============================================================
   19. FOOTER
   ============================================================ */
.footer {
  background: var(--color-gray-900);
  color: var(--color-gray-400);
  padding: var(--space-16) 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: var(--space-8);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand p {
  color: var(--color-gray-400);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  margin-top: var(--space-4);
}

.footer-brand .logo {
  color: var(--text-inverse);
  margin-bottom: var(--space-2);
}

.footer-brand .logo span {
  color: var(--color-primary-light);
}

.footer-social {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gray-400);
  font-size: var(--text-sm);
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  background: var(--color-primary);
  color: var(--text-inverse);
  transform: translateY(-2px);
}

.footer-column h4 {
  color: var(--text-inverse);
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-5);
}

.footer-column ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

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

.footer-column a:hover {
  color: var(--text-inverse);
}

.footer-bottom {
  padding: var(--space-6) 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--text-xs);
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-bottom-links {
  display: flex;
  gap: var(--space-6);
}

.footer-bottom-links a {
  color: var(--color-gray-500);
  font-size: var(--text-xs);
}

.footer-bottom-links a:hover {
  color: var(--text-inverse);
}

/* ============================================================
   20. HOW IT WORKS
   ============================================================ */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
  position: relative;
}

.steps::before {
  content: '';
  position: absolute;
  top: 48px;
  left: 20%;
  right: 20%;
  height: 2px;
  background: var(--color-gray-200);
  z-index: 0;
}

.step {
  text-align: center;
  position: relative;
  z-index: 1;
}

.step-number {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: var(--text-inverse);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: 800;
  margin: 0 auto var(--space-5);
  box-shadow: var(--shadow-primary);
}

.step h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
}

.step p {
  font-size: var(--text-sm);
  max-width: 280px;
  margin: 0 auto;
}

/* ============================================================
   21. LESSON COMPONENTS
   ============================================================ */
.lesson-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.lesson-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.lesson-item:hover {
  border-color: var(--color-primary-light);
  background: var(--color-primary-subtle);
}

.lesson-number {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--color-primary-lighter);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--text-sm);
  flex-shrink: 0;
}

.lesson-item.completed .lesson-number {
  background: var(--color-success);
  color: var(--text-inverse);
}

.lesson-item.locked .lesson-number {
  background: var(--color-gray-200);
  color: var(--text-tertiary);
}

.lesson-info {
  flex-grow: 1;
}

.lesson-info h4 {
  font-size: var(--text-base);
  margin-bottom: var(--space-1);
}

.lesson-info p {
  font-size: var(--text-sm);
}

.lesson-status {
  font-size: var(--text-xs);
  font-weight: 600;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
}

/* ============================================================
   22. VOCABULARY / GRAMMAR
   ============================================================ */
.vocab-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-4);
}

.vocab-category {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  transition: all var(--transition-base);
  cursor: pointer;
}

.vocab-category:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-subtle);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.vocab-category .cat-icon {
  font-size: 36px;
  margin-bottom: var(--space-3);
}

.vocab-category h3 {
  font-size: var(--text-base);
  margin-bottom: var(--space-1);
}

.vocab-category .word-count {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
}

.word-table {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.word-row {
  display: grid;
  grid-template-columns: 1fr 1fr 60px;
  padding: var(--space-3) var(--space-5);
  border-bottom: 1px solid var(--color-gray-100);
  align-items: center;
  transition: background var(--transition-fast);
}

.word-row:hover {
  background: var(--color-primary-subtle);
}

.word-row:last-child {
  border-bottom: none;
}

.word-russian {
  font-weight: 600;
  font-size: var(--text-lg);
}

.word-spanish {
  color: var(--text-secondary);
}

.word-audio {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-lighter);
  color: var(--color-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.word-audio:hover {
  background: var(--color-primary);
  color: var(--text-inverse);
}

/* ============================================================
   23. QUIZ COMPONENTS
   ============================================================ */
.quiz-container {
  max-width: 700px;
  margin: 0 auto;
}

.quiz-progress {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.quiz-progress .progress {
  flex-grow: 1;
}

.quiz-counter {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
}

.quiz-question {
  text-align: center;
  margin-bottom: var(--space-8);
}

.quiz-question h2 {
  font-size: var(--text-2xl);
}

.quiz-question .quiz-word {
  font-size: var(--text-4xl);
  font-weight: 800;
  color: var(--color-primary);
  margin: var(--space-4) 0;
  font-family: var(--font-heading);
}

.quiz-options {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

.quiz-option {
  padding: var(--space-5) var(--space-6);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  text-align: center;
  font-size: var(--text-base);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-base);
}

.quiz-option:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-subtle);
}

.quiz-option.selected {
  border-color: var(--color-primary);
  background: var(--color-primary-lighter);
  color: var(--color-primary);
  font-weight: 600;
}

.quiz-option.correct {
  border-color: var(--color-success);
  background: var(--color-success-light);
  color: var(--color-success);
}

.quiz-option.incorrect {
  border-color: var(--color-error);
  background: var(--color-error-light);
  color: var(--color-error);
}

.quiz-actions {
  display: flex;
  justify-content: center;
  margin-top: var(--space-8);
  gap: var(--space-4);
}

.quiz-result {
  text-align: center;
  padding: var(--space-12);
}

.quiz-score {
  font-family: var(--font-heading);
  font-size: var(--text-6xl);
  font-weight: 900;
  color: var(--color-primary);
  margin: var(--space-4) 0;
}

/* ============================================================
   24. PROFILE & STATS
   ============================================================ */
.profile-header {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  padding: var(--space-8);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-8);
}

.profile-avatar {
  width: 96px;
  height: 96px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-inverse);
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: 800;
  flex-shrink: 0;
}

.profile-info h1 {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-2);
}

.profile-info p {
  font-size: var(--text-sm);
}

.profile-stats {
  display: flex;
  gap: var(--space-6);
  margin-top: var(--space-4);
}

.profile-stat {
  text-align: center;
}

.profile-stat-value {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--color-primary);
}

.profile-stat-label {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
}

/* ============================================================
   25. RANKING TABLE
   ============================================================ */
.ranking-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.ranking-item:hover {
  background: var(--color-gray-50);
}

.ranking-item.current-user {
  background: var(--color-primary-subtle);
  border: 1px solid var(--color-primary-light);
}

.ranking-position {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: var(--text-base);
  color: var(--text-tertiary);
  flex-shrink: 0;
}

.ranking-position.top-1 {
  color: #ffd700;
  font-size: var(--text-xl);
}

.ranking-position.top-2 {
  color: #c0c0c0;
  font-size: var(--text-lg);
}

.ranking-position.top-3 {
  color: #cd7f32;
  font-size: var(--text-lg);
}

.ranking-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--text-inverse);
  flex-shrink: 0;
}

.ranking-info {
  flex-grow: 1;
}

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

.ranking-level {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
}

.ranking-xp {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-primary);
  font-size: var(--text-sm);
}

/* ============================================================
   26. COMMUNITY
   ============================================================ */
.discussion-card {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-5);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.discussion-card:hover {
  border-color: var(--color-primary-light);
  background: var(--color-primary-subtle);
}

.discussion-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--text-inverse);
  flex-shrink: 0;
}

.discussion-content h4 {
  font-size: var(--text-base);
  margin-bottom: var(--space-2);
}

.discussion-content p {
  font-size: var(--text-sm);
  margin-bottom: var(--space-3);
}

.discussion-meta {
  display: flex;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: var(--text-tertiary);
}

/* ============================================================
   27. COOKIE BANNER
   ============================================================ */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-gray-900);
  color: var(--color-gray-300);
  padding: var(--space-5) var(--space-6);
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  transform: translateY(100%);
  transition: transform var(--transition-slow);
  flex-wrap: wrap;
}

.cookie-banner.visible {
  transform: translateY(0);
}

.cookie-banner p {
  color: var(--color-gray-300);
  font-size: var(--text-sm);
  flex: 1;
}

.cookie-banner a {
  color: var(--color-primary-light);
}

.cookie-buttons {
  display: flex;
  gap: var(--space-3);
  flex-shrink: 0;
}

/* ============================================================
   28. SCROLL PROGRESS BAR
   ============================================================ */
.scroll-progress {
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
  z-index: var(--z-sticky);
  transition: width 50ms linear;
}

/* ============================================================
   29. AD SPACES (Reserved)
   ============================================================ */
.ad-space {
  /* Reserved container for future ad integration */
  min-height: 90px;
  border-radius: var(--radius-md);
  background: var(--color-gray-50);
  border: 1px dashed var(--color-gray-300);
  display: none;
  /* Hidden until ads are activated */
  align-items: center;
  justify-content: center;
  color: var(--text-tertiary);
  font-size: var(--text-xs);
}

.ad-space-sidebar {
  min-height: 250px;
}

/* ============================================================
   30. LEGAL PAGES
   ============================================================ */
.legal-content {
  max-width: 800px;
  margin: 0 auto;
}

.legal-content h2 {
  font-size: var(--text-2xl);
  margin-top: var(--space-10);
  margin-bottom: var(--space-4);
}

.legal-content h3 {
  font-size: var(--text-xl);
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
}

.legal-content p {
  margin-bottom: var(--space-4);
}

.legal-content ul {
  list-style: disc;
  padding-left: var(--space-6);
  margin-bottom: var(--space-4);
}

.legal-content ul li {
  padding: var(--space-1) 0;
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
}

.legal-content .updated {
  font-size: var(--text-sm);
  color: var(--text-tertiary);
  margin-bottom: var(--space-8);
}

/* ============================================================
   31. 404 PAGE
   ============================================================ */
.error-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-8);
}

.error-code {
  font-family: var(--font-heading);
  font-size: clamp(6rem, 15vw, 12rem);
  font-weight: 900;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: var(--space-4);
}

/* ============================================================
   32. ARTICLE PAGE
   ============================================================ */
.article-header {
  margin-bottom: var(--space-8);
}

.article-header .article-category {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-4);
}

.article-header h1 {
  font-size: var(--text-4xl);
  margin-bottom: var(--space-4);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--text-sm);
  color: var(--text-tertiary);
}

.article-author {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.article-author-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-inverse);
  font-weight: 700;
  font-size: var(--text-xs);
}

.article-body {
  font-size: var(--text-lg);
  line-height: 1.8;
  color: var(--text-secondary);
}

.article-body h2 {
  font-size: var(--text-2xl);
  margin-top: var(--space-10);
  margin-bottom: var(--space-4);
  color: var(--text-primary);
}

.article-body h3 {
  font-size: var(--text-xl);
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
  color: var(--text-primary);
}

.article-body p {
  margin-bottom: var(--space-5);
  font-size: var(--text-lg);
}

.article-body ul,
.article-body ol {
  list-style: disc;
  padding-left: var(--space-6);
  margin-bottom: var(--space-5);
}

.article-body li {
  padding: var(--space-1) 0;
  line-height: 1.8;
  color: var(--text-secondary);
}

.article-body blockquote {
  border-left: 4px solid var(--color-primary);
  padding: var(--space-4) var(--space-6);
  margin: var(--space-6) 0;
  background: var(--color-primary-subtle);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-style: italic;
}

/* ============================================================
   33. ANIMATIONS & KEYFRAMES
   ============================================================ */
@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-24px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-24px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(24px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes floatChar {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-8px);
  }
}

@keyframes pulse {

  0%,
  100% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.05);
  }
}

@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }

  100% {
    background-position: 200% 0;
  }
}

/* — Scroll animation classes — */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

.animate-on-scroll.delay-1 {
  transition-delay: 0.1s;
}

.animate-on-scroll.delay-2 {
  transition-delay: 0.2s;
}

.animate-on-scroll.delay-3 {
  transition-delay: 0.3s;
}

.animate-on-scroll.delay-4 {
  transition-delay: 0.4s;
}

.animate-on-scroll.delay-5 {
  transition-delay: 0.5s;
}

/* ============================================================
   34. UTILITY CLASSES
   ============================================================ */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.mt-4 {
  margin-top: var(--space-4);
}

.mt-6 {
  margin-top: var(--space-6);
}

.mt-8 {
  margin-top: var(--space-8);
}

.mb-4 {
  margin-bottom: var(--space-4);
}

.mb-6 {
  margin-bottom: var(--space-6);
}

.mb-8 {
  margin-bottom: var(--space-8);
}

.hidden {
  display: none !important;
}

.block {
  display: block;
}

/* ============================================================
   35. RESPONSIVE DESIGN
   ============================================================ */

/* Tablet */
@media (max-width: 1024px) {
  :root {
    --text-5xl: 2.5rem;
    --text-4xl: 2rem;
    --text-3xl: 1.5rem;
  }

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

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

  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-content {
    max-width: none;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-illustration {
    display: none;
  }

  .page-layout {
    grid-template-columns: 1fr;
  }

  .page-sidebar {
    position: static;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

  .steps {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin: 0 auto;
  }

  .steps::before {
    display: none;
  }
}

/* Mobile */
@media (max-width: 768px) {
  :root {
    --text-5xl: 2rem;
    --text-4xl: 1.75rem;
    --text-3xl: 1.375rem;
    --text-2xl: 1.25rem;
    --header-height: 64px;
  }

  .container {
    padding: 0 var(--space-4);
  }

  .section {
    padding: var(--space-12) 0;
  }

  .section-lg {
    padding: var(--space-16) 0;
  }

  /* Mobile Navigation */
  .nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-primary);
    flex-direction: column;
    padding: var(--space-6);
    gap: var(--space-1);
    transform: translateX(100%);
    transition: transform var(--transition-base);
    overflow-y: auto;
    z-index: var(--z-overlay);
  }

  .nav.open {
    transform: translateX(0);
  }

  .nav-link {
    width: 100%;
    padding: var(--space-4);
    font-size: var(--text-base);
    border-radius: var(--radius-md);
  }

  .menu-toggle {
    display: flex;
  }

  /* Grids */
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .quiz-options {
    grid-template-columns: 1fr;
  }

  /* Footer */
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  /* Profile */
  .profile-header {
    flex-direction: column;
    text-align: center;
  }

  .profile-stats {
    justify-content: center;
  }

  /* Breadcrumbs */
  .breadcrumbs {
    font-size: var(--text-xs);
  }

  /* Cookie banner */
  .cookie-banner {
    flex-direction: column;
    text-align: center;
  }

  /* Hero Visual */
  .cyrillic-char {
    width: 60px !important;
    height: 60px !important;
    font-size: var(--text-2xl) !important;
  }
}

/* Small Mobile */
@media (max-width: 480px) {
  :root {
    --text-5xl: 1.75rem;
    --text-4xl: 1.5rem;
  }

  .hero {
    padding: calc(var(--header-height) + var(--space-10)) 0 var(--space-10);
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
  }

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

/* ============================================================
   36. PRINT STYLES
   ============================================================ */
@media print {

  .header,
  .footer,
  .cookie-banner,
  .scroll-progress,
  .ad-space,
  .menu-toggle {
    display: none !important;
  }

  body {
    color: #000;
    background: #fff;
  }

  .section {
    padding: 1rem 0;
  }
}

/* ============================================================
   37. PREMIUM DESIGN & MICROINTERACTIONS
   ============================================================ */
.premium-card {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.05);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s ease;
}

.premium-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.1);
}

.premium-btn {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: white;
  border: none;
  box-shadow: 0 4px 15px rgba(26, 115, 232, 0.3);
  transition: all 0.3s ease;
}

.premium-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 20px rgba(26, 115, 232, 0.4);
}

/* ============================================================
   38. ADSENSE PLACEHOLDERS
   ============================================================ */
.ad-slot {
  width: 100%;
  max-width: 970px;
  min-height: 90px;
  margin: 2rem auto;
  background-color: var(--bg-secondary);
  border: 1px dashed var(--color-gray-300);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-tertiary);
  font-size: var(--text-sm);
  text-align: center;
  overflow: hidden;
  position: relative;
}

.ad-slot::after {
  content: 'Espacio publicitario reservado';
  opacity: 0.5;
}

/* ============================================================
   39. PROFILE & BADGES (rediseño de banner)
   ------------------------------------------------------------
   NOTA: estas reglas reutilizan a propósito los nombres de clase
   .profile-header y .profile-stats ya definidos en la sección
   "24. PROFILE & STATS" más arriba, para convertir ese bloque en
   un banner con degradado. Al tener la misma especificidad, estas
   reglas (por ir después) ganan en las propiedades que ambas
   definen. Si algún día se separa el diseño del perfil, lo más
   seguro es darle una clase propia (p. ej. .profile-header--banner)
   en vez de seguir dependiendo del orden de aparición en el archivo.
   ============================================================ */
.profile-header {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
  color: white;
  padding: 4rem 0;
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
  margin-bottom: 2rem;
}

.profile-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  margin-top: 2rem;
}

.stat-box {
  background: rgba(255, 255, 255, 0.1);
  padding: 1rem 2rem;
  border-radius: var(--radius-md);
  backdrop-filter: blur(5px);
  text-align: center;
  flex: 1;
  min-width: 120px;
}

.stat-box h4 {
  font-size: var(--text-3xl);
  margin-bottom: 0.25rem;
}

.badge-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 1.5rem;
  margin-top: 1rem;
}

.badge-item {
  text-align: center;
  opacity: 0.4;
  filter: grayscale(100%);
  transition: all 0.3s ease;
}

.badge-item.earned {
  opacity: 1;
  filter: grayscale(0%);
}

.badge-icon {
  font-size: 3rem;
  margin-bottom: 0.5rem;
  display: inline-block;
  background: var(--bg-secondary);
  width: 80px;
  height: 80px;
  line-height: 80px;
  border-radius: 50%;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

.badge-item.earned .badge-icon {
  background: linear-gradient(135deg, #FFD700, #FFA500);
  box-shadow: 0 4px 15px rgba(255, 215, 0, 0.4);
}

/* ============================================================
   40. REDISEÑO HOMEPAGE GORUSKY X1000 — ULTRA-PREMIUM (STRIPE / LINEAR / APPLE LEVEL)
   ============================================================ */

:root {
  --gr-blue-main: #2563eb;
  --gr-blue-dark: #1d4ed8;
  --gr-blue-deep: #1e40af;
  --gr-blue-navy: #0f172a;
  --gr-blue-light: #f0f7ff;
  --gr-blue-soft: #e0f2fe;
  --gr-blue-border: #bfdbfe;
  --gr-gray-bg: #f8fafc;
  --gr-gray-subtle: #f1f5f9;
  --gr-gray-text: #475569;
  --gr-dark-text: #0f172a;
}

/* — Global SVG Icon helper — */
.gr-icon {
  width: 24px;
  height: 24px;
  fill: currentColor;
  display: inline-block;
  vertical-align: middle;
  flex-shrink: 0;
}

.gr-icon-lg {
  width: 32px;
  height: 32px;
}

.gr-icon-xl {
  width: 44px;
  height: 44px;
}

/* — Header Glassmorphism Ultra-Premium — */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
  z-index: var(--z-sticky);
  transition: all 0.3s ease;
}

.header.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.06);
  border-bottom-color: rgba(203, 213, 225, 0.5);
}

/* — Dropdown Navigation — */
.nav-item-dropdown {
  position: relative;
  display: inline-block;
}

.nav-item-dropdown>.nav-link {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  min-width: 210px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: 16px;
  box-shadow: 0 20px 40px -15px rgba(15, 23, 42, 0.12), 0 0 0 1px rgba(37, 99, 235, 0.08);
  padding: 0.5rem;
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: var(--z-dropdown);
}

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

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.7rem 1rem;
  color: var(--gr-dark-text);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: 10px;
  transition: all 0.2s ease;
}

.dropdown-item:hover,
.dropdown-item:focus {
  background: var(--gr-blue-light);
  color: var(--gr-blue-main);
  transform: translateX(3px);
}

/* — Logo Startup Style — */
.logo-badge {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  color: white;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 1.3rem;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
  transition: transform 0.3s ease;
}

.logo:hover .logo-badge {
  transform: scale(1.05) rotate(-3deg);
}

/* ============================================================
   HERO 100vh FULLSCREEN (STRIPE / LINEAR / APPLE STYLE)
   ============================================================ */
.hero-wrapper-100vh {
  position: relative;
  min-height: calc(100vh - var(--header-height));
  display: flex;
  align-items: center;
  padding: 3rem 0 4rem;
  background: #ffffff;
  overflow: hidden;
}

@media (max-width: 992px) {
  .hero-wrapper-100vh {
    min-height: auto;
    padding: 5rem 0 4rem;
  }
}

/* Background Ambient Lighting & Grids */
.hero-ambient-lights {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 0;
}

.ambient-blob-1 {
  position: absolute;
  top: -15%;
  right: 10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(219, 234, 254, 0.75) 0%, rgba(239, 246, 255, 0) 70%);
  filter: blur(80px);
  opacity: 0.85;
}

.ambient-blob-2 {
  position: absolute;
  bottom: -10%;
  left: -5%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(191, 219, 254, 0.5) 0%, rgba(255, 255, 255, 0) 70%);
  filter: blur(90px);
}

.hero-grid-pattern {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(37, 99, 235, 0.08) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: radial-gradient(ellipse 60% 50% at 50% 40%, #000 70%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 60% 50% at 50% 40%, #000 70%, transparent 100%);
}

.hero-container-inner {
  position: relative;
  z-index: 1;
  width: 100%;
}

.hero-grid-2col {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3.5rem;
  align-items: center;
}

@media (max-width: 992px) {
  .hero-grid-2col {
    grid-template-columns: 1fr;
    gap: 3.5rem;
    text-align: center;
  }
}

/* Hero Badge */
.hero-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.45rem 1.1rem;
  background: rgba(224, 242, 254, 0.8);
  backdrop-filter: blur(8px);
  color: var(--gr-blue-dark);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: 100px;
  margin-bottom: 1.5rem;
  border: 1px solid rgba(191, 219, 254, 0.8);
  box-shadow: 0 2px 10px rgba(37, 99, 235, 0.06);
}

/* Hero H1 Impact Title */
.hero-title-impact {
  font-size: clamp(2.75rem, 5.2vw, 4.25rem);
  font-weight: 900;
  line-height: 1.08;
  color: var(--gr-dark-text);
  margin-bottom: 1.25rem;
  letter-spacing: -0.035em;
}

.hero-title-impact .gradient-text-blue {
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 50%, #1e40af 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}

/* Hero Subtitle */
.hero-subtitle-impact {
  font-size: clamp(1.1rem, 2vw, 1.25rem);
  color: #475569;
  line-height: 1.65;
  margin-bottom: 2.25rem;
  max-width: 580px;
  font-weight: 450;
}

@media (max-width: 992px) {
  .hero-subtitle-impact {
    margin-left: auto;
    margin-right: auto;
  }
}

/* Premium Buttons */
.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

@media (max-width: 992px) {
  .hero-cta-group {
    justify-content: center;
  }
}

.btn-ultra-primary {
  position: relative;
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  color: #ffffff !important;
  font-weight: 700;
  font-size: 1.125rem;
  padding: 1.05rem 2.4rem;
  border-radius: 16px;
  box-shadow: 0 12px 30px -5px rgba(37, 99, 235, 0.4), 0 4px 12px rgba(15, 23, 42, 0.08);
  transition: all 0.28s cubic-bezier(0.16, 1, 0.3, 1);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  overflow: hidden;
}

.btn-ultra-primary::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
  transform: skewX(-20deg);
  transition: left 0.75s ease;
}

.btn-ultra-primary:hover::after {
  left: 140%;
}

.btn-ultra-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 18px 40px -5px rgba(37, 99, 235, 0.5), 0 8px 20px rgba(15, 23, 42, 0.12);
}

.btn-ultra-primary:active {
  transform: translateY(-1px) scale(0.99);
}

.btn-ultra-secondary {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  color: var(--gr-blue-dark) !important;
  font-weight: 700;
  font-size: 1.125rem;
  padding: 1.05rem 2.1rem;
  border-radius: 16px;
  border: 2px solid var(--gr-blue-border);
  transition: all 0.28s cubic-bezier(0.16, 1, 0.3, 1);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.03);
}

.btn-ultra-secondary:hover {
  background: var(--gr-blue-light);
  border-color: var(--gr-blue-main);
  transform: translateY(-3px);
  box-shadow: 0 10px 24px rgba(37, 99, 235, 0.15);
}

/* — Social Proof Avatar Stack — */
.hero-social-proof {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(226, 232, 240, 0.8);
  flex-wrap: wrap;
}

@media (max-width: 992px) {
  .hero-social-proof {
    justify-content: center;
  }
}

.avatar-stack {
  display: flex;
  align-items: center;
}

.avatar-stack-item {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 3px solid #ffffff;
  margin-left: -12px;
  font-size: 0.82rem;
  font-weight: 800;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  flex-shrink: 0;
}

.avatar-stack-item:first-child {
  margin-left: 0;
}

.avatar-bg-1 {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
}

.avatar-bg-2 {
  background: linear-gradient(135deg, #0284c7, #0369a1);
}

.avatar-bg-3 {
  background: linear-gradient(135deg, #4f46e5, #4338ca);
}

.avatar-bg-4 {
  background: linear-gradient(135deg, #0d9488, #0f766e);
}

.social-proof-content {
  display: flex;
  flex-direction: column;
  text-align: left;
}

.rating-row {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.15rem;
}

.rating-stars-inline {
  display: flex;
  gap: 2px;
  color: #f59e0b;
}

.rating-score-badge {
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--gr-dark-text);
}

.social-proof-text {
  font-size: 0.88rem;
  color: #64748b;
  font-weight: 500;
  margin: 0;
}

/* ============================================================
   SMARTPHONE 3D PERSPECTIVE MOCKUP & GLASS CHIPS
   ============================================================ */
.hero-mockup-3d-wrapper {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  perspective: 1200px;
  padding: 1rem;
}

.phone-mockup-3d {
  position: relative;
  z-index: 2;
  width: 320px;
  background: #ffffff;
  border: 11px solid #0f172a;
  border-radius: 44px;
  /* 3D Perspective Tilt */
  transform: perspective(1200px) rotateY(-14deg) rotateX(7deg) rotateZ(3deg);
  transform-style: preserve-3d;
  /* Multi-layered Soft Shadows */
  box-shadow:
    -25px 35px 70px -15px rgba(15, 23, 42, 0.22),
    -10px 15px 30px -10px rgba(37, 99, 235, 0.2),
    0 0 0 1px rgba(255, 255, 255, 0.2);
  overflow: hidden;
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.5s ease;
}

.hero-mockup-3d-wrapper:hover .phone-mockup-3d {
  transform: perspective(1200px) rotateY(-6deg) rotateX(3deg) rotateZ(1deg) translateY(-8px);
  box-shadow:
    -30px 45px 85px -15px rgba(15, 23, 42, 0.28),
    -15px 20px 40px -10px rgba(37, 99, 235, 0.3);
}

@media (max-width: 992px) {
  .phone-mockup-3d {
    transform: none !important;
    width: 290px;
    box-shadow: 0 20px 50px -10px rgba(15, 23, 42, 0.18);
  }
}

/* Glass Shimmer Overlay */
.phone-glass-shimmer {
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(135deg,
      rgba(255, 255, 255, 0) 0%,
      rgba(255, 255, 255, 0.18) 45%,
      rgba(255, 255, 255, 0.35) 50%,
      rgba(255, 255, 255, 0) 55%);
  pointer-events: none;
  z-index: 10;
  animation: glassShimmer 8s infinite ease-in-out;
}

@keyframes glassShimmer {
  0% {
    transform: translateY(-30%) translateX(-30%);
  }

  50%,
  100% {
    transform: translateY(30%) translateX(30%);
  }
}

.phone-header-premium {
  background: #f8fafc;
  padding: 1.1rem 1.25rem 0.85rem;
  border-bottom: 1px solid #e2e8f0;
}

.phone-notch-bar {
  width: 110px;
  height: 16px;
  background: #0f172a;
  margin: -0.65rem auto 0.85rem;
  border-bottom-left-radius: 12px;
  border-bottom-right-radius: 12px;
}

.animated-progress-fill {
  width: 68%;
  height: 100%;
  background: linear-gradient(90deg, #2563eb, #3b82f6);
  border-radius: 4px;
  position: relative;
  overflow: hidden;
}

.animated-progress-fill::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  animation: progressPulse 2.5s infinite;
}

@keyframes progressPulse {
  0% {
    transform: translateX(-100%);
  }

  100% {
    transform: translateX(100%);
  }
}

/* Glass Floating Chips Balanced */
.glass-floating-chip {
  position: absolute;
  z-index: 3;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 0.65rem 1.15rem;
  border-radius: 18px;
  box-shadow: 0 15px 35px -5px rgba(15, 23, 42, 0.1), 0 0 0 1px rgba(255, 255, 255, 0.6);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border: 1px solid rgba(219, 234, 254, 0.8);
  animation: floatDrift 6s ease-in-out infinite alternate;
}

.chip-pos-racha {
  top: 10%;
  left: -25px;
  animation-duration: 5s;
}

.chip-pos-xp {
  top: 30%;
  right: -30px;
  animation-duration: 6.5s;
  animation-delay: 1s;
}

.chip-pos-nivel {
  bottom: 25%;
  left: -35px;
  animation-duration: 7s;
  animation-delay: 2s;
}

.chip-pos-lessons {
  bottom: 8%;
  right: -20px;
  animation-duration: 5.5s;
  animation-delay: 1.5s;
}

@keyframes floatDrift {
  0% {
    transform: translateY(0px) rotate(0deg);
  }

  100% {
    transform: translateY(-12px) rotate(1.5deg);
  }
}

@media (max-width: 992px) {
  .glass-floating-chip {
    display: none;
  }
}

/* — Sección 3: Cómo Funciona — */
.steps-section {
  padding: 6rem 0;
  background: #ffffff;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem;
  margin-top: 3.5rem;
  position: relative;
}

@media (max-width: 768px) {
  .steps-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

.step-card {
  background: var(--gr-gray-bg);
  border: 1px solid var(--gr-blue-light);
  border-radius: var(--radius-lg);
  padding: 2.5rem 1.75rem;
  text-align: center;
  position: relative;
  transition: all 0.3s ease;
}

.step-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 40px -10px rgba(37, 99, 235, 0.12);
  border-color: var(--gr-blue-border);
  background: white;
}

/* Escapada bajo .steps-grid: sin este prefijo pisaba el .step-number
   del componente ".steps" (sección "20. HOW IT WORKS"), cambiándole
   posición (absolute), tamaño y sombra en cualquier página que use
   ese componente más antiguo. */
.steps-grid .step-number {
  position: absolute;
  top: -20px;
  left: 50%;
  transform: translateX(-50%);
  width: 42px;
  height: 42px;
  background: var(--gr-blue-main);
  color: white;
  font-weight: 800;
  font-size: 1.1rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.35);
}

.step-icon-wrapper {
  width: 72px;
  height: 72px;
  background: var(--gr-blue-light);
  color: var(--gr-blue-main);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0.75rem auto 1.5rem;
}

.step-card h3 {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--gr-dark-text);
  margin-bottom: 0.75rem;
}

.step-card p {
  font-size: 0.95rem;
  color: var(--gr-gray-text);
  line-height: 1.6;
}

/* — Sección 4: Características Principales — */
.features-section {
  padding: 6rem 0;
  background: var(--gr-blue-light);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 3.5rem;
}

@media (max-width: 992px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
}

/* Escapadas bajo .features-grid: sin este prefijo pisaban el
   ".feature-card" genérico (sección "8. CARDS"), cambiándole el
   layout (flex en vez de texto centrado) en cualquier otra página
   que use ese componente más simple. */
.features-grid .feature-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 2.25rem 2rem;
  border: 1px solid rgba(191, 219, 254, 0.7);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.features-grid .feature-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 40px -10px rgba(37, 99, 235, 0.14);
  border-color: var(--gr-blue-main);
}

.feature-icon-box {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: var(--gr-blue-light);
  color: var(--gr-blue-main);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.features-grid .feature-card h3 {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--gr-dark-text);
  margin-bottom: 0.5rem;
}

.features-grid .feature-card p {
  font-size: 0.95rem;
  color: var(--gr-gray-text);
  line-height: 1.6;
}

/* — Sección 5: Cursos por Niveles — */
.levels-section {
  padding: 6rem 0;
  background: #ffffff;
}

.levels-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1.25rem;
  margin-top: 3.5rem;
}

@media (max-width: 1200px) {
  .levels-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .levels-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .levels-grid {
    grid-template-columns: 1fr;
  }
}

.level-card {
  background: white;
  border: 2px solid var(--gr-blue-light);
  border-radius: var(--radius-lg);
  padding: 1.75rem 1.25rem;
  text-align: center;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.level-card:hover {
  border-color: var(--gr-blue-main);
  transform: translateY(-5px);
  box-shadow: 0 16px 35px -5px rgba(37, 99, 235, 0.14);
}

.level-icon-circle {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--gr-blue-light);
  color: var(--gr-blue-main);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.25rem;
}

.level-card h3 {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--gr-dark-text);
  margin-bottom: 0.35rem;
}

.level-card p {
  font-size: 0.85rem;
  color: var(--gr-gray-text);
  margin-bottom: 1.25rem;
}

.level-progress-wrapper {
  margin-bottom: 0.75rem;
}

.level-progress-bg {
  height: 6px;
  background: var(--gr-blue-light);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 0.4rem;
}

.level-progress-bar {
  width: 0%;
  height: 100%;
  background: var(--gr-blue-main);
  border-radius: 3px;
}

.level-lessons-count {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--gr-blue-dark);
}

/* — Sección 6: Estadísticas / Confianza — */
.stats-banner-section {
  padding: 4.5rem 0;
  background: linear-gradient(135deg, var(--gr-blue-navy) 0%, var(--gr-blue-deep) 50%, var(--gr-blue-main) 100%);
  color: white;
  position: relative;
  overflow: hidden;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  text-align: center;
}

@media (max-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem 1.5rem;
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-icon {
  width: 48px;
  height: 48px;
  color: #ffffff;
  margin-bottom: 1rem;
  opacity: 0.95;
}

/* Escapadas bajo .stats-grid a propósito: sin este prefijo, estas
   reglas (por ir después en el archivo) pisaban el .stat-number/
   .stat-label del componente genérico ".stat-card" usado en otras
   páginas (p. ej. las tarjetas "Nivel / Duración / Lecciones" del
   curso), dejando ese texto en blanco sobre fondo claro e ilegible. */
.stats-grid .stat-number {
  font-size: clamp(2.2rem, 3.5vw, 3.25rem);
  font-weight: 900;
  line-height: 1;
  color: #ffffff;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.stats-grid .stat-label {
  font-size: 1rem;
  color: var(--gr-blue-soft);
  font-weight: 600;
}

/* — Sección 7: Testimonios Carrusel — */
.testimonials-section {
  padding: 6rem 0;
  background: var(--gr-gray-bg);
}

.carousel-wrapper {
  position: relative;
  max-width: 860px;
  margin: 3.5rem auto 0;
  overflow: hidden;
  padding: 1rem 0;
}

.carousel-track {
  display: flex;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.testimonial-slide {
  min-width: 100%;
  padding: 0 1rem;
  box-sizing: border-box;
}

/* Las cuatro reglas .testimonial-* de aquí abajo van escapadas bajo
   .carousel-wrapper a propósito: sin ese prefijo pisaban las clases
   homónimas más simples de la sección "17. TESTIMONIALS" (tarjeta de
   testimonio suelta, sin carrusel) en cualquier otra página que las
   use fuera de este carrusel. */
.carousel-wrapper .testimonial-card {
  background: white;
  border-radius: var(--radius-xl);
  padding: 2.75rem 3rem;
  border: 1px solid var(--gr-blue-light);
  box-shadow: 0 16px 40px -10px rgba(37, 99, 235, 0.08);
  text-align: center;
}

@media (max-width: 640px) {
  .carousel-wrapper .testimonial-card {
    padding: 2rem 1.5rem;
  }
}

.carousel-wrapper .testimonial-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--gr-blue-main), var(--gr-blue-dark));
  color: white;
  font-weight: 800;
  font-size: 1.35rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  box-shadow: 0 6px 18px rgba(37, 99, 235, 0.25);
}

.carousel-wrapper .testimonial-name {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--gr-dark-text);
}

.testimonial-country {
  font-size: 0.85rem;
  color: var(--gr-gray-text);
  font-weight: 500;
  margin-bottom: 0.75rem;
}

.carousel-wrapper .testimonial-stars {
  display: flex;
  justify-content: center;
  gap: 0.25rem;
  color: #f59e0b;
  margin-bottom: 1.25rem;
}

.testimonial-quote {
  font-size: 1.1rem;
  line-height: 1.6;
  color: var(--gr-dark-text);
  font-style: italic;
}

.carousel-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 2rem;
}

.carousel-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: white;
  border: 1px solid var(--gr-blue-border);
  color: var(--gr-blue-main);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

.carousel-btn:hover {
  background: var(--gr-blue-main);
  color: white;
  border-color: var(--gr-blue-main);
}

.carousel-dots {
  display: flex;
  gap: 0.5rem;
}

.carousel-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gr-blue-soft);
  cursor: pointer;
  transition: all 0.25s ease;
}

.carousel-dot.active {
  width: 28px;
  border-radius: 5px;
  background: var(--gr-blue-main);
}

/* — Sección 8: CTA Final — */
.cta-final-section {
  padding: 5.5rem 0;
  background: #ffffff;
}

.cta-final-card {
  background: linear-gradient(135deg, var(--gr-blue-light) 0%, #ffffff 100%);
  border: 2px solid var(--gr-blue-soft);
  border-radius: var(--radius-xl);
  padding: 5rem 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 50px -10px rgba(37, 99, 235, 0.1);
}

.cta-final-card h2 {
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 900;
  color: var(--gr-dark-text);
  margin-bottom: 1rem;
}

.cta-final-card p {
  font-size: 1.2rem;
  color: var(--gr-gray-text);
  margin-bottom: 2.5rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* — Sección 9: Footer Completo — */
.footer-redesign {
  background: #0f172a;
  color: #94a3b8;
  padding: 5rem 0 2.5rem;
  border-top: 1px solid #1e293b;
}

.footer-grid-5 {
  display: grid;
  grid-template-columns: 2fr repeat(4, 1fr);
  gap: 3rem;
  margin-bottom: 4rem;
}

@media (max-width: 1024px) {
  .footer-grid-5 {
    grid-template-columns: repeat(3, 1fr);
  }

  .footer-col-brand {
    grid-column: span 3;
  }
}

@media (max-width: 640px) {
  .footer-grid-5 {
    grid-template-columns: 1fr 1fr;
  }

  .footer-col-brand {
    grid-column: span 2;
  }
}

.footer-logo {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 1rem;
  display: inline-block;
}

.footer-logo span {
  color: var(--gr-blue-main);
}

.footer-brand-desc {
  font-size: 0.92rem;
  color: #94a3b8;
  line-height: 1.65;
  max-width: 320px;
}

.footer-col-title {
  font-size: 1rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 1.25rem;
  letter-spacing: 0.02em;
}

.footer-links-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links-list a {
  color: #94a3b8;
  font-size: 0.92rem;
  transition: color 0.2s ease;
}

.footer-links-list a:hover {
  color: #ffffff;
}

.social-icons-list {
  display: flex;
  gap: 1rem;
}

.social-icon-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: #1e293b;
  color: #94a3b8;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.social-icon-btn:hover {
  background: var(--gr-blue-main);
  color: #ffffff;
  transform: translateY(-2px);
}

.footer-bottom-bar {
  padding-top: 2rem;
  border-top: 1px solid #1e293b;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.88rem;
}

@media (max-width: 640px) {
  .footer-bottom-bar {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}

/* ============================================================
   41. ACCESIBILIDAD — prefers-reduced-motion
   ------------------------------------------------------------
   Para quienes activan "reducir movimiento" en su sistema:
   colapsa animaciones y transiciones a una duración casi nula
   (en vez de eliminarlas, lo que podría romper estados que
   dependen del final de una transición) y desactiva el scroll
   suave. Cubre los bucles decorativos infinitos del hero 3D
   (floatChar, glassShimmer, floatDrift, progressPulse) y el tilt
   3D del mockup controlado por JS en main.js.
   ============================================================ */
/* ============================================================
   42. HEADER COMPONENTS (Mobile Menu & Scroll Progress)
   ============================================================ */

/* Panel de navegación móvil */
.mobile-nav-panel {
  display: none;
  position: fixed;
  top: 73px;
  left: 0;
  right: 0;
  background: #fff;
  border-bottom: 1px solid #e2e8f0;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.1);
  padding: 24px;
  z-index: 99;
}

.mobile-nav-panel.open {
  display: block;
}

.mobile-nav-panel nav {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.mobile-nav-panel nav a {
  font-size: 1.05rem;
  font-weight: 600;
  padding: 12px 0;
  border-bottom: 1px solid #e2e8f0;
  color: #0f172a;
}

.mobile-nav-panel nav a:last-child {
  border-bottom: none;
}

/* Barra de progreso de scroll */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  z-index: 300;
  background: linear-gradient(90deg, #2563eb, #6366f1);
  transition: width .12s linear;
}

/* Menú hamburguesa (oculto por defecto) */
.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: #eff6ff;
  color: #2563eb;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: none;
  transition: all 0.3s ease;
}

.menu-toggle:hover {
  background: #2563eb;
  color: white;
}

/* Responsive: Mostrar menú hamburguesa en móvil */
@media (max-width: 860px) {

  .header .nav,
  .header-actions .btn-ultra-secondary,
  .header-actions .btn-ultra-primary {
    display: none !important;
  }

  .menu-toggle {
    display: flex !important;
  }
}

/* ============================================================
   44. BOTONES DEL HEADER (EXACTAMENTE COMO EL INDEX.HTML)
   ============================================================ */

/* Forzar los estilos originales del index.html solo en el header */
.header .btn-ultra-secondary {
  padding: 0.6rem 1.35rem !important;
  font-size: 0.95rem !important;
  border-radius: 11px !important;
  font-weight: 700 !important;
  border: 1.5px solid #e2e8f0 !important;
  color: #0f172a !important;
  display: inline-flex !important;
  align-items: center !important;
  background: transparent !important;
  box-shadow: none !important;
  text-decoration: none !important;
  transition: all 0.4s cubic-bezier(.16, 1, .3, 1) !important;
}

.header .btn-ultra-secondary:hover {
  border-color: #2563eb !important;
  color: #2563eb !important;
  background: #eff6ff !important;
  transform: translateY(-2px) !important;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.1) !important;
}

.header .btn-ultra-secondary:active {
  transform: translateY(1px) scale(0.98) !important;
  box-shadow: none !important;
}

.header .btn-ultra-primary {
  display: inline-flex !important;
  align-items: center !important;
  gap: 8px !important;
  padding: 0.65rem 1.45rem !important;
  font-size: 0.95rem !important;
  background: linear-gradient(135deg, #2563eb, #1d4ed8) !important;
  color: #fff !important;
  font-weight: 700 !important;
  border-radius: 11px !important;
  box-shadow: 0 6px 18px rgba(37, 99, 235, 0.3) !important;
  text-decoration: none !important;
  border: none !important;
  transition: all 0.4s cubic-bezier(.16, 1, .3, 1) !important;
}

.header .btn-ultra-primary::after {
  display: none !important;
}

.header .btn-ultra-primary:hover {
  transform: translateY(-2px) scale(1.02) !important;
  box-shadow: 0 12px 24px rgba(37, 99, 235, 0.45) !important;
}

.header .btn-ultra-primary:active {
  transform: translateY(1px) scale(0.98) !important;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3) !important;
}

/* Panel móvil: botón "Comenzar gratis" igual */
.mobile-nav-panel .btn-ultra-primary {
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  gap: 8px !important;
  padding: 0.95rem 1.7rem !important;
  font-size: 1rem !important;
  background: linear-gradient(135deg, #2563eb, #1d4ed8) !important;
  color: #fff !important;
  font-weight: 700 !important;
  border-radius: 11px !important;
  box-shadow: 0 6px 18px rgba(37, 99, 235, 0.3) !important;
  text-decoration: none !important;
  border: none !important;
  transition: all 0.4s cubic-bezier(.16, 1, .3, 1) !important;
  width: 100% !important;
}

.mobile-nav-panel .btn-ultra-primary::after {
  display: none !important;
}

@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ============================================================
   45. OCULTAR BOTONES DEL HEADER EN MÓVIL (FORZADO)
   ============================================================ */
@media (max-width: 860px) {

  header.header div.header-actions>a:first-child,
  header.header div.header-actions>a:nth-child(2) {
    display: none !important;
    visibility: hidden !important;
    opacity: 0 !important;
    pointer-events: none !important;
    position: absolute !important;
    width: 0 !important;
    height: 0 !important;
    overflow: hidden !important;
  }

  /* Ocultar cualquier enlace dentro de header-actions excepto el botón menú */
  .header-actions a:not(.menu-toggle) {
    display: none !important;
  }
}

/* ============================================================
   43. ESTILOS EXACTOS DEL HEADER (COPIADOS DE INDEX.HTML)
   ============================================================ */

/* Header general */
.header-inner.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

/* Botones del header */
.btn-ultra-secondary {
  padding: 0.6rem 1.35rem;
  font-size: 0.95rem;
  border-radius: 11px;
  font-weight: 700;
  border: 1.5px solid var(--gr-border);
  color: var(--gr-dark-text);
  display: inline-flex;
  align-items: center;
  transition: all 0.4s var(--ease);
}

.btn-ultra-secondary:hover {
  border-color: var(--gr-blue-main);
  color: var(--gr-blue-main);
  background: var(--gr-blue-light);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.1);
}

.btn-ultra-secondary:active {
  transform: translateY(1px) scale(0.98);
  box-shadow: none;
}

.btn-ultra-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0.65rem 1.45rem;
  font-size: 0.95rem;
  background: linear-gradient(135deg, var(--gr-blue-main), var(--gr-blue-dark));
  color: #fff;
  font-weight: 700;
  border-radius: 11px;
  box-shadow: 0 6px 18px rgba(37, 99, 235, 0.3);
  transition: all 0.4s var(--ease);
}

.btn-ultra-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 12px 24px rgba(37, 99, 235, 0.45);
}

.btn-ultra-primary:active {
  transform: translateY(1px) scale(0.98);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-ultra-primary .gr-icon {
  transition: transform .5s var(--ease);
}

.btn-ultra-primary:hover .gr-icon {
  transform: translateX(4px);
}

/* ============================================================
   HEADER FIJO Y ANCHO LIMITADO
   ============================================================ */

/* Header fijo al hacer scroll */
.header {
  position: fixed !important;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  width: 100%;
  height: 76px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gr-border);
}

/* Limitar el ancho del contenido interior */
.header .header-inner {
  max-width: 1600px !important;
  margin: 0 auto !important;
  padding-left: clamp(20px, 4vw, 64px) !important;
  padding-right: clamp(20px, 4vw, 64px) !important;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ESPACIO para que el contenido NO quede tapado por el header */
body {
  padding-top: 76px !important;
}

/* Barra de progreso ENCIMA del header */
.scroll-progress {
  position: fixed !important;
  top: 0 !important;
  left: 0;
  width: 100%;
  z-index: 200 !important;
}

/* Panel móvil ajustado */
.mobile-nav-panel {
  top: 76px !important;
}