/* ============================================
   TESTEVOLVE - Senior Level Responsive Design
   Modern CSS Architecture with Fluid Typography & Spacing
   Mobile-First | Performance Optimized | Touch-Friendly
   ============================================ */

/* ==================== CSS LAYERS ==================== */
@layer reset, tokens, base, layout, components, utilities, responsive;

/* ==================== RESET LAYER ==================== */
@layer reset {
  *, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }

  html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
  }

  body {
    min-height: 100vh;
    min-height: 100dvh; /* Dynamic viewport height for mobile */
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeSpeed;
  }

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

  input, button, textarea, select {
    font: inherit;
    color: inherit;
  }

  p, h1, h2, h3, h4, h5, h6 {
    overflow-wrap: break-word;
  }

  a {
    color: inherit;
    text-decoration: none;
  }

  ul, ol {
    list-style: none;
  }

  button {
    background: none;
    border: none;
    cursor: pointer;
  }
}

/* ==================== DESIGN TOKENS ==================== */
@layer tokens {
  :root {
    /* ===== COLOR PALETTE ===== */
    --navy-primary: #1a365d;
    --electric-blue: #00d4ff;
    --electric-blue-hover: #00b8e6;
    --electric-blue-glow: rgba(0, 212, 255, 0.3);
    --black: #000000;
    --white: #ffffff;
    --dark-bg: #0a0e1a;
    --dark-bg-lighter: #111827;
    --gray-accent: #64748b;
    --gray-light: #e5e7eb;
    --gray-muted: #9ca3af;
    --success-green: #10b981;
    --warning-orange: #f59e0b;
    --danger-red: #ef4444;
    
    /* ===== GRADIENTS ===== */
    --gradient-primary: linear-gradient(135deg, var(--navy-primary) 0%, var(--dark-bg) 100%);
    --gradient-blue: linear-gradient(135deg, var(--electric-blue) 0%, #0099cc 100%);
    --gradient-hero: linear-gradient(180deg, rgba(10, 14, 26, 0.9) 0%, rgba(26, 54, 93, 0.8) 50%, rgba(10, 14, 26, 0.95) 100%);
    --gradient-card: linear-gradient(145deg, rgba(26, 54, 93, 0.4) 0%, rgba(10, 14, 26, 0.6) 100%);
    
    /* ===== SHADOWS ===== */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px var(--electric-blue-glow);
    --shadow-glow-strong: 0 0 60px rgba(0, 212, 255, 0.5);
    
    /* ===== FLUID TYPOGRAPHY SCALE (clamp-based) ===== */
    /* Min @ 320px viewport, Max @ 1440px viewport */
    --text-xs: clamp(0.7rem, 0.66rem + 0.18vw, 0.8rem);
    --text-sm: clamp(0.8rem, 0.74rem + 0.27vw, 0.95rem);
    --text-base: clamp(0.95rem, 0.87rem + 0.36vw, 1.125rem);
    --text-lg: clamp(1.1rem, 0.98rem + 0.54vw, 1.375rem);
    --text-xl: clamp(1.25rem, 1.07rem + 0.8vw, 1.75rem);
    --text-2xl: clamp(1.5rem, 1.23rem + 1.2vw, 2.25rem);
    --text-3xl: clamp(1.875rem, 1.43rem + 1.96vw, 3rem);
    --text-4xl: clamp(2.25rem, 1.57rem + 3.04vw, 4rem);
    --text-5xl: clamp(2.75rem, 1.71rem + 4.64vw, 5rem);
    
    /* ===== FLUID SPACING SCALE ===== */
    --space-3xs: clamp(0.25rem, 0.21rem + 0.18vw, 0.375rem);
    --space-2xs: clamp(0.5rem, 0.43rem + 0.32vw, 0.7rem);
    --space-xs: clamp(0.75rem, 0.64rem + 0.49vw, 1rem);
    --space-s: clamp(1rem, 0.86rem + 0.63vw, 1.375rem);
    --space-m: clamp(1.5rem, 1.29rem + 0.94vw, 2rem);
    --space-l: clamp(2rem, 1.71rem + 1.29vw, 2.75rem);
    --space-xl: clamp(3rem, 2.57rem + 1.93vw, 4rem);
    --space-2xl: clamp(4rem, 3.43rem + 2.57vw, 5.5rem);
    --space-3xl: clamp(6rem, 5.14rem + 3.86vw, 8rem);
    
    /* ===== TYPOGRAPHY ===== */
    --font-heading: 'Montserrat', 'Inter', system-ui, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --line-height-tight: 1.2;
    --line-height-normal: 1.6;
    --line-height-relaxed: 1.8;
    --letter-spacing-tight: -0.02em;
    --letter-spacing-wide: 0.05em;
    --letter-spacing-wider: 0.1em;
    
    /* ===== LAYOUT ===== */
    --container-max: 1440px;
    --container-padding: clamp(1rem, 0.5rem + 2.5vw, 2.5rem);
    --section-padding-block: clamp(3rem, 2rem + 4.5vw, 7rem);
    
    /* ===== BORDERS ===== */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 9999px;
    
    /* ===== TRANSITIONS ===== */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms ease;
    --transition-bounce: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
    
    /* ===== Z-INDEX SCALE ===== */
    --z-base: 1;
    --z-dropdown: 100;
    --z-sticky: 500;
    --z-fixed: 900;
    --z-modal: 1000;
    --z-tooltip: 1100;
    
    /* ===== TOUCH TARGETS ===== */
    --touch-target-min: 44px;
    --touch-gap-min: 8px;
  }
}

/* ==================== BASE STYLES ==================== */
@layer base {
  body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    color: var(--white);
    background-color: var(--dark-bg);
    overflow-x: hidden;
  }

  /* ===== HEADINGS ===== */
  h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    letter-spacing: var(--letter-spacing-tight);
    color: var(--white);
  }

  h1 { font-size: var(--text-4xl); }
  h2 { font-size: var(--text-3xl); }
  h3 { font-size: var(--text-2xl); }
  h4 { font-size: var(--text-xl); }
  h5 { font-size: var(--text-lg); }
  h6 { font-size: var(--text-base); }

  p {
    font-size: var(--text-base);
    color: var(--gray-light);
  }

  a {
    color: var(--electric-blue);
    transition: color var(--transition-fast);
  }

  /* ===== SELECTION ===== */
  ::selection {
    background: var(--electric-blue);
    color: var(--dark-bg);
  }

  /* ===== SCROLLBAR ===== */
  ::-webkit-scrollbar {
    width: 8px;
    height: 8px;
  }

  ::-webkit-scrollbar-track {
    background: var(--dark-bg);
  }

  ::-webkit-scrollbar-thumb {
    background: var(--navy-primary);
    border-radius: 4px;
  }

  ::-webkit-scrollbar-thumb:hover {
    background: var(--electric-blue);
  }

  * {
    scrollbar-width: thin;
    scrollbar-color: var(--navy-primary) var(--dark-bg);
  }

  /* ===== FOCUS STYLES ===== */
  :focus-visible {
    outline: 2px solid var(--electric-blue);
    outline-offset: 3px;
  }

  :focus:not(:focus-visible) {
    outline: none;
  }
}

/* ==================== LAYOUT COMPONENTS ==================== */
@layer layout {
  /* ===== CONTAINER ===== */
  .container {
    width: 100%;
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: var(--container-padding);
  }

  /* ===== SECTION ===== */
  .section {
    padding-block: var(--section-padding-block);
    position: relative;
  }

  .section-dark {
    background: var(--dark-bg);
  }

  .section-navy {
    background: var(--gradient-primary);
  }

  /* ===== SECTION HEADER ===== */
  .section-header {
    text-align: center;
    max-width: 800px;
    margin-inline: auto;
    margin-block-end: var(--space-xl);
  }

  .section-header h2 {
    margin-block-end: var(--space-s);
  }

  .section-header p {
    font-size: var(--text-lg);
    color: var(--gray-accent);
  }
}

/* ==================== COMPONENTS ==================== */
@layer components {
  /* ===== BADGE ===== */
  .badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2xs);
    padding: var(--space-2xs) var(--space-s);
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    color: var(--electric-blue);
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-wide);
  }

  /* ===== TEXT GRADIENT ===== */
  .text-gradient {
    background: var(--gradient-blue);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }

  /* ===== BUTTONS ===== */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2xs);
    min-height: var(--touch-target-min);
    padding: var(--space-s) var(--space-m);
    font-family: var(--font-heading);
    font-size: var(--text-sm);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-wide);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    white-space: nowrap;
  }

  .btn-primary {
    background: var(--gradient-blue);
    color: var(--dark-bg);
    box-shadow: var(--shadow-glow);
  }

  .btn-secondary {
    background: transparent;
    color: var(--electric-blue);
    border: 2px solid var(--electric-blue);
  }

  .btn-large {
    padding: var(--space-s) var(--space-l);
    font-size: var(--text-base);
  }

  .btn-pulse {
    animation: pulse 2s infinite;
  }

  @keyframes pulse {
    0%, 100% { box-shadow: var(--shadow-glow); }
    50% { box-shadow: var(--shadow-glow-strong), 0 0 80px rgba(0, 212, 255, 0.4); }
  }

  /* ===== HEADER / NAVIGATION ===== */
  .header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    padding-block: var(--space-xs);
    background: rgba(10, 14, 26, 0.98);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 212, 255, 0.1);
    transition: all var(--transition-normal);
  }

  .header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-m);
  }

  .logo {
    display: flex;
    align-items: center;
    flex-shrink: 0;
  }

  .logo-img {
    height: 32px;
    width: auto;
    object-fit: contain;
  }

  .nav {
    display: flex;
    align-items: center;
    gap: var(--space-m);
  }

  .nav-links {
    display: none;
    gap: var(--space-m);
  }

  .nav-links a {
    color: var(--gray-light);
    font-size: var(--text-sm);
    font-weight: var(--font-weight-medium);
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-wide);
    padding: var(--space-2xs) 0;
    position: relative;
    transition: color var(--transition-fast);
  }

  .nav-links a::after {
    content: '';
    position: absolute;
    inset-inline: 0;
    bottom: 0;
    height: 2px;
    background: var(--electric-blue);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition-normal);
  }

  .nav-links a:hover {
    color: var(--electric-blue);
  }

  .nav-links a:hover::after {
    transform: scaleX(1);
    transform-origin: left;
  }

  .header .btn {
    display: none;
  }

  /* Mobile Menu Toggle */
  .menu-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: var(--touch-target-min);
    height: var(--touch-target-min);
    padding: 10px;
    cursor: pointer;
    z-index: calc(var(--z-modal) + 1);
  }

  .menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--white);
    transition: all var(--transition-fast);
    transform-origin: center;
  }

  .menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .menu-toggle.active span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
  }

  .menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  /* Mobile Navigation Overlay */
  .nav-links.mobile-open {
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: 0;
    background: rgba(10, 14, 26, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: calc(var(--space-3xl) + var(--space-xl)) var(--space-m) var(--space-xl);
    z-index: var(--z-modal);
    overflow-y: auto;
    gap: 0;
  }

  .nav-links.mobile-open li {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  .nav-links.mobile-open a {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(var(--touch-target-min) + var(--space-s));
    font-size: var(--text-lg);
  }

  .nav-links.mobile-open a::after {
    display: none;
  }

  /* ===== HERO SECTION ===== */
  .hero {
    position: relative;
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    padding-block: calc(70px + var(--space-m)) var(--space-xl);
    overflow: hidden;
  }

  .hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-hero);
    z-index: 1;
  }

  .hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
  }

  .hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.3;
  }

  .hero-content {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    gap: var(--space-l);
    text-align: center;
  }

  .hero-text {
    order: 2;
    max-width: 100%;
  }

  .hero-tagline {
    margin-block-end: var(--space-s);
  }

  .hero h1 {
    margin-block-end: var(--space-s);
  }

  .hero h1 span {
    color: var(--electric-blue);
  }

  .hero-subtitle {
    font-size: var(--text-lg);
    color: var(--gray-light);
    margin-block-end: var(--space-m);
    max-width: 600px;
    margin-inline: auto;
  }

  .hero-trust {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-s) var(--space-m);
    margin-block-end: var(--space-l);
  }

  .trust-item {
    display: flex;
    align-items: center;
    gap: var(--space-2xs);
    font-size: var(--text-sm);
    color: var(--gray-light);
  }

  .trust-item svg {
    width: 20px;
    height: 20px;
    fill: var(--electric-blue);
    flex-shrink: 0;
  }

  .hero-cta {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-s);
  }

  .hero-cta .btn {
    width: 100%;
    max-width: 320px;
  }

  .hero-guarantee {
    font-size: var(--text-sm);
    color: var(--gray-accent);
  }

  .hero-image {
    order: 1;
    display: flex;
    justify-content: center;
    align-items: center;
  }

  .hero-image img {
    max-width: min(280px, 70vw);
    height: auto;
    border-radius: var(--radius-lg);
    border: 2px solid rgba(0, 212, 255, 0.2);
    box-shadow: var(--shadow-lg), 0 0 60px rgba(0, 212, 255, 0.2);
    animation: float 6s ease-in-out infinite;
    transition: all var(--transition-normal);
    aspect-ratio: 5/6;
    object-fit: contain;
    margin-top: 46px;
  }

  .hero-image img:hover {
    border-color: var(--electric-blue);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
  }

  @keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
  }

  .scroll-indicator {
    display: none;
    position: absolute;
    bottom: var(--space-m);
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    animation: bounce 2s infinite;
  }

  @keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(10px); }
  }

  /* ===== STATS BAR ===== */
  .stats-bar {
    background: rgba(26, 54, 93, 0.5);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-block: 1px solid rgba(0, 212, 255, 0.2);
    padding-block: var(--space-l);
  }

  .stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-m) var(--space-s);
    text-align: center;
  }

  .stat-item {
    padding: var(--space-xs);
  }

  .stat-number {
    font-family: var(--font-heading);
    font-size: var(--text-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--electric-blue);
    line-height: 1;
    margin-block-end: var(--space-3xs);
  }

  .stat-label {
    font-size: var(--text-xs);
    color: var(--gray-light);
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-wider);
  }

  /* ===== PROBLEM SECTION ===== */
  .problem-section {
    background: var(--dark-bg-lighter);
  }

  .problem-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-l);
  }

  .problem-visual img {
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    aspect-ratio: 16/10;
    object-fit: cover;
  }

  .problem-list {
    display: flex;
    flex-direction: column;
  }

  .problem-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-s);
    padding-block: var(--space-s);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  .problem-item:last-child {
    border-bottom: none;
  }

  .problem-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    color: var(--danger-red);
    margin-top: 2px;
  }

  .problem-text {
    font-size: var(--text-base);
    color: var(--gray-light);
  }

  .problem-quote {
    margin-block-start: var(--space-m);
    padding: var(--space-m);
    background: var(--gradient-card);
    border-inline-start: 4px solid var(--electric-blue);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    font-style: italic;
    color: var(--gray-light);
  }

  /* ===== SOLUTION SECTION ===== */
  .solution-section {
    position: relative;
    overflow: hidden;
  }

  .solution-bg {
    position: absolute;
    inset: 0;
    opacity: 0.1;
  }

  .solution-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .solution-content {
    position: relative;
    z-index: 1;
  }

  .solution-intro {
    max-width: 800px;
    margin-inline: auto;
    margin-block-end: var(--space-xl);
    text-align: center;
    font-size: var(--text-lg);
    color: var(--gray-light);
  }

  .solution-intro strong {
    color: var(--electric-blue);
  }

  .process-cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-m);
  }

  .process-card {
    background: var(--gradient-card);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: var(--radius-lg);
    padding: var(--space-l);
    text-align: center;
    transition: all var(--transition-normal);
  }

  .process-card:hover {
    transform: translateY(-5px);
    border-color: var(--electric-blue);
    box-shadow: var(--shadow-glow);
  }

  .process-icon {
    width: 70px;
    height: 70px;
    margin-inline: auto;
    margin-block-end: var(--space-s);
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 212, 255, 0.1);
    border-radius: var(--radius-full);
    font-size: var(--text-2xl);
  }

  .process-card h4 {
    color: var(--electric-blue);
    margin-block-end: var(--space-xs);
    font-size: var(--text-lg);
  }

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

  /* ===== FORMULA SECTION ===== */
  .formula-section {
    background: var(--dark-bg-lighter);
  }

  .formula-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-l);
  }

  .formula-image img {
    width: 100%;
    max-width: 350px;
    margin-inline: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
  }

  .ingredients-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-s);
  }

  .ingredient-item {
    background: var(--gradient-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: border-color var(--transition-normal);
  }

  .ingredient-item:hover {
    border-color: rgba(0, 212, 255, 0.3);
  }

  .ingredient-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-s);
    cursor: pointer;
    min-height: var(--touch-target-min);
    transition: background var(--transition-fast);
  }

  .ingredient-header:hover {
    background: rgba(0, 212, 255, 0.05);
  }

  .ingredient-title {
    display: flex;
    flex-direction: column;
    gap: var(--space-3xs);
  }

  .ingredient-name {
    font-weight: var(--font-weight-semibold);
    color: var(--white);
    font-size: var(--text-sm);
  }

  .ingredient-dose {
    color: var(--electric-blue);
    font-weight: var(--font-weight-medium);
    font-size: var(--text-sm);
  }

  .ingredient-toggle {
    width: 24px;
    height: 24px;
    color: var(--gray-accent);
    transition: transform var(--transition-fast);
    flex-shrink: 0;
  }

  .ingredient-item.active .ingredient-toggle {
    transform: rotate(180deg);
  }

  .ingredient-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
  }

  .ingredient-item.active .ingredient-content {
    max-height: 400px;
  }

  .ingredient-details {
    padding: 0 var(--space-s) var(--space-s);
  }

  .ai-reason {
    display: flex;
    align-items: flex-start;
    gap: var(--space-xs);
    padding: var(--space-s);
    background: rgba(0, 212, 255, 0.1);
    border-radius: var(--radius-sm);
    margin-block-end: var(--space-s);
  }

  .ai-reason-icon {
    flex-shrink: 0;
    color: var(--electric-blue);
    width: 20px;
    height: 20px;
  }

  .ai-reason p {
    margin: 0;
    font-size: var(--text-sm);
  }

  .ingredient-benefits {
    display: flex;
    flex-direction: column;
    gap: var(--space-2xs);
  }

  .ingredient-benefits li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-2xs);
    font-size: var(--text-sm);
    color: var(--gray-light);
  }

  .ingredient-benefits li svg {
    flex-shrink: 0;
    width: 16px;
    height: 16px;
    color: var(--success-green);
    margin-top: 3px;
  }

  /* ===== TIMELINE SECTION ===== */
  .timeline-section {
    position: relative;
  }

  .timeline {
    position: relative;
    max-width: 900px;
    margin-inline: auto;
    padding-inline-start: 30px;
  }

  .timeline::before {
    content: '';
    position: absolute;
    left: 12px;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(to bottom, var(--electric-blue), var(--navy-primary));
    border-radius: 2px;
  }

  .timeline-item {
    position: relative;
    padding-block-end: var(--space-l);
    padding-inline-start: var(--space-l);
  }

  .timeline-marker {
    position: absolute;
    left: calc(-30px + 2px);
    top: 0;
    width: 20px;
    height: 20px;
    background: var(--electric-blue);
    border: 4px solid var(--dark-bg);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-glow);
  }

  .timeline-content {
    background: var(--gradient-card);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: var(--radius-md);
    padding: var(--space-m);
  }

  .timeline-period {
    color: var(--electric-blue);
    font-weight: var(--font-weight-semibold);
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-wider);
    margin-block-end: var(--space-3xs);
  }

  .timeline-content h4 {
    font-size: var(--text-base);
    margin-block-end: var(--space-xs);
  }

  .timeline-content p {
    font-size: var(--text-sm);
    margin: 0;
  }

  /* ===== RESULTS SECTION ===== */
  .results-section {
    background: var(--dark-bg-lighter);
  }

  .results-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-l);
  }

  .results-image img {
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    aspect-ratio: auto;
    object-fit: contain;
    height: auto;
    max-width: 100%;
  }

  .results-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-s);
  }

  .result-stat {
    background: var(--gradient-card);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: var(--radius-md);
    padding: var(--space-m);
    text-align: center;
    transition: all var(--transition-normal);
  }

  .result-stat:hover {
    border-color: var(--electric-blue);
    box-shadow: var(--shadow-glow);
  }

  .result-value {
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: var(--font-weight-bold);
    color: var(--electric-blue);
    line-height: 1;
    margin-block-end: var(--space-3xs);
  }

  .result-label {
    font-size: var(--text-xs);
    color: var(--gray-light);
  }

  .study-citation {
    margin-block-start: var(--space-m);
    padding: var(--space-s);
    background: rgba(0, 212, 255, 0.1);
    border-radius: var(--radius-md);
    text-align: center;
    font-size: var(--text-xs);
    color: var(--gray-accent);
  }

  /* ===== BENEFITS SECTION ===== */
  .benefits-section {
    text-align: center;
  }

  .benefits-image {
    max-width: 1000px;
    margin-inline: auto;
  }

  .benefits-image img {
    width: 100%;
    border-radius: var(--radius-lg);
  }

  /* ===== TESTIMONIALS / TRANSFORMATIONS ===== */
  .testimonials-section {
    background: var(--dark-bg-lighter);
    overflow: hidden;
  }

  .transformation-block {
    margin-block-end: var(--space-xl);
  }

  .transformation-header {
    text-align: center;
    margin-block-end: var(--space-m);
  }

  .transformation-badge {
    display: inline-block;
    padding: var(--space-2xs) var(--space-s);
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--electric-blue);
    margin-block-end: var(--space-s);
  }

  .transformation-header h3 {
    font-size: var(--text-xl);
    margin-block-end: var(--space-xs);
  }

  .transformation-header p {
    font-size: var(--text-base);
    color: var(--gray-accent);
    max-width: 600px;
    margin-inline: auto;
  }

  .transformation-card-single {
    max-width: 900px;
    margin-inline: auto;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 2px solid rgba(0, 212, 255, 0.2);
    transition: all var(--transition-normal);
  }

  .transformation-card-single:hover {
    border-color: var(--electric-blue);
    box-shadow: var(--shadow-glow);
    transform: translateY(-5px);
  }

  .transformation-card-single img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 0;
  }

  /* ===== TESTIMONIALS SLIDER ===== */
  .testimonials-container {
    position: relative;
    max-width: 1200px;
    margin-inline: auto;
    padding-inline: var(--space-s);
  }

  .testimonials-viewport {
    overflow-x: auto;
    overflow-y: hidden;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding-block: var(--space-xs);
    scroll-behavior: smooth;
  }

  .testimonials-viewport::-webkit-scrollbar {
    display: none;
  }

  .testimonials-track {
    display: flex;
    gap: var(--space-m);
    padding-inline: var(--space-2xs);
  }

  .testimonial-card {
    flex: 0 0 calc(100% - var(--space-l));
    min-width: 280px;
    max-width: 380px;
    background: var(--gradient-card);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-md);
    padding: var(--space-m);
    scroll-snap-align: center;
    scroll-snap-stop: always;
    transition: all var(--transition-normal);
  }

  .testimonial-card:hover {
    border-color: rgba(0, 212, 255, 0.4);
    transform: translateY(-3px);
  }

  .testimonial-stars {
    color: var(--warning-orange);
    margin-block-end: var(--space-s);
    font-size: var(--text-lg);
  }

  .testimonial-text {
    font-size: var(--text-sm);
    color: var(--gray-light);
    margin-block-end: var(--space-m);
    line-height: var(--line-height-relaxed);
  }

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

  .author-avatar {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    background: var(--navy-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-weight-semibold);
    color: var(--electric-blue);
    flex-shrink: 0;
  }

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

  .author-name {
    color: var(--white);
    font-weight: var(--font-weight-semibold);
  }

  .author-location {
    color: var(--gray-accent);
    font-size: var(--text-xs);
  }

  /* Navigation Buttons */
  .testimonial-nav {
    display: none;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    background: var(--navy-primary);
    border: 2px solid var(--electric-blue);
    color: var(--electric-blue);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    z-index: 10;
  }

  .testimonial-nav:hover {
    background: var(--electric-blue);
    color: var(--dark-bg);
  }

  .testimonial-prev {
    left: 0;
  }

  .testimonial-next {
    right: 0;
  }

  /* Dots Indicator */
  .testimonials-dots {
    display: flex;
    justify-content: center;
    gap: var(--space-xs);
    margin-block-start: var(--space-m);
    padding-block: var(--space-xs);
  }

  .testimonial-dot {
    width: 12px;
    height: 12px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.2);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    min-width: var(--touch-target-min);
    min-height: var(--touch-target-min);
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .testimonial-dot::before {
    content: '';
    width: 12px;
    height: 12px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.3);
    transition: all var(--transition-fast);
  }

  .testimonial-dot:hover::before {
    background: rgba(0, 212, 255, 0.5);
  }

  .testimonial-dot.active::before {
    background: var(--electric-blue);
    transform: scale(1.2);
  }

  /* ===== TEAM SECTION ===== */
  .team-section {
    background: var(--dark-bg);
  }

  .team-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-m);
    max-width: 400px;
    margin-inline: auto;
  }

  .team-card {
    background: var(--gradient-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
  }

  .team-card:hover {
    border-color: rgba(0, 212, 255, 0.3);
    transform: translateY(-5px);
  }

  .team-image {
    aspect-ratio: 4/3;
    overflow: hidden;
  }

  .team-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
    transition: transform var(--transition-slow);
  }

  .team-card:hover .team-image img {
    transform: scale(1.05);
  }

  .team-info {
    padding: var(--space-m);
    text-align: center;
  }

  .team-info h4 {
    font-size: var(--text-base);
    margin-block-end: var(--space-3xs);
  }

  .team-role {
    color: var(--electric-blue);
    font-size: var(--text-sm);
    font-weight: var(--font-weight-medium);
    margin-block-end: var(--space-xs);
  }

  .team-bio {
    font-size: var(--text-sm);
    color: var(--gray-accent);
  }

  /* ===== COMPARISON TABLE ===== */
  .comparison-section {
    background: var(--dark-bg-lighter);
  }

  .comparison-table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin-inline: calc(var(--container-padding) * -1);
    padding-inline: var(--container-padding);
    position: relative;
  }

  .comparison-table-wrapper::after {
    content: '← Scroll →';
    display: block;
    text-align: center;
    padding-block-start: var(--space-s);
    font-size: var(--text-xs);
    color: var(--gray-accent);
    opacity: 0.7;
  }

  .comparison-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px;
  }

  .comparison-table th,
  .comparison-table td {
    padding: var(--space-s);
    text-align: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    font-size: var(--text-sm);
  }

  .comparison-table th {
    background: rgba(0, 212, 255, 0.1);
    color: var(--white);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    font-size: var(--text-xs);
    letter-spacing: var(--letter-spacing-wide);
    white-space: nowrap;
  }

  .comparison-table th:first-child,
  .comparison-table td:first-child {
    text-align: left;
    position: sticky;
    left: 0;
    background: var(--dark-bg-lighter);
    z-index: 1;
  }

  .comparison-table td:first-child {
    font-weight: var(--font-weight-medium);
    color: var(--white);
  }

  .comparison-table td {
    color: var(--gray-light);
  }

  .comparison-table .highlight-col {
    background: rgba(0, 212, 255, 0.05);
    border-inline: 2px solid var(--electric-blue);
  }

  .comparison-table .highlight-col.th-cell {
    background: rgba(0, 212, 255, 0.2);
    color: var(--electric-blue);
  }

  .check-yes { color: var(--success-green); }
  .check-no { color: var(--danger-red); }
  .check-partial { color: var(--warning-orange); }

  /* ===== FAQ SECTION ===== */
  .faq-section {
    background: var(--dark-bg);
  }

  .faq-list {
    max-width: 800px;
    margin-inline: auto;
  }

  .faq-item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  .faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-s);
    padding-block: var(--space-m);
    cursor: pointer;
    min-height: var(--touch-target-min);
    transition: color var(--transition-fast);
  }

  .faq-question:hover {
    color: var(--electric-blue);
  }

  .faq-question h4 {
    font-size: var(--text-base);
    font-weight: var(--font-weight-medium);
    margin: 0;
    text-align: left;
  }

  .faq-toggle {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    color: var(--electric-blue);
    transition: transform var(--transition-fast);
  }

  .faq-item.active .faq-toggle {
    transform: rotate(45deg);
  }

  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
  }

  .faq-item.active .faq-answer {
    max-height: 600px;
  }

  .faq-answer p {
    padding-block-end: var(--space-m);
    line-height: var(--line-height-relaxed);
    font-size: var(--text-sm);
  }

  /* ===== PRICING SECTION ===== */
  .pricing-section {
    background: var(--dark-bg);
    position: relative;
  }

  .pricing-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-m);
    max-width: 400px;
    margin-inline: auto;
    margin-block-end: var(--space-xl);
  }

  .pricing-card {
    background: var(--gradient-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--space-l);
    text-align: center;
    position: relative;
    transition: all var(--transition-normal);
  }

  .pricing-card:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 212, 255, 0.3);
  }

  .pricing-card.featured {
    border: 2px solid var(--electric-blue);
    box-shadow: var(--shadow-glow);
    order: -1;
  }

  .pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-blue);
    color: var(--dark-bg);
    padding: var(--space-2xs) var(--space-s);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: var(--font-weight-bold);
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-wide);
    white-space: nowrap;
  }

  .pricing-title {
    font-size: var(--text-lg);
    margin-block-end: var(--space-3xs);
  }

  .pricing-quantity {
    color: var(--gray-accent);
    font-size: var(--text-sm);
    margin-block-end: var(--space-m);
  }

  .pricing-price {
    margin-block-end: var(--space-m);
  }

  .price-original {
    color: var(--gray-accent);
    text-decoration: line-through;
    font-size: var(--text-lg);
  }

  .price-current {
    font-family: var(--font-heading);
    font-size: var(--text-3xl);
    font-weight: var(--font-weight-bold);
    color: var(--electric-blue);
    display: block;
    line-height: 1;
  }

  .price-savings {
    color: var(--success-green);
    font-size: var(--text-xs);
    font-weight: var(--font-weight-semibold);
    margin-block-start: var(--space-2xs);
  }

  .pricing-features {
    margin-block-end: var(--space-m);
    text-align: left;
  }

  .pricing-features li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-2xs);
    padding-block: var(--space-2xs);
    color: var(--gray-light);
    font-size: var(--text-sm);
  }

  .pricing-features svg {
    flex-shrink: 0;
    width: 18px;
    height: 18px;
    color: var(--success-green);
    margin-top: 2px;
  }

  .pricing-cta {
    width: 100%;
  }

  /* Bonuses Section */
  .bonuses-section {
    background: var(--gradient-card);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: var(--radius-lg);
    padding: var(--space-l);
  }

  .bonuses-title {
    text-align: center;
    margin-block-end: var(--space-m);
    font-size: var(--text-lg);
  }

  .bonuses-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-m);
  }

  .bonus-card {
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-md);
    padding: var(--space-m);
    text-align: center;
  }

  .bonus-icon {
    font-size: var(--text-2xl);
    margin-block-end: var(--space-xs);
  }

  .bonus-card h4 {
    font-size: var(--text-sm);
    margin-block-end: var(--space-3xs);
  }

  .bonus-value {
    color: var(--electric-blue);
    font-size: var(--text-xs);
    font-weight: var(--font-weight-semibold);
    margin-block-end: var(--space-xs);
  }

  .bonus-card p {
    font-size: var(--text-xs);
    color: var(--gray-accent);
    margin: 0;
  }

  /* ===== FINAL CTA SECTION ===== */
  .final-cta-section {
    position: relative;
    padding-block: var(--space-3xl) calc(var(--space-3xl) + 80px);
    text-align: center;
    overflow: hidden;
  }

  .final-cta-bg {
    position: absolute;
    inset: 0;
  }

  .final-cta-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.3;
  }

  .final-cta-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-hero);
  }

  .final-cta-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin-inline: auto;
  }

  .final-cta-content h2 {
    margin-block-end: var(--space-s);
  }

  .final-cta-content p {
    font-size: var(--text-lg);
    margin-block-end: var(--space-l);
  }

  .final-cta-button {
    margin-block-end: var(--space-m);
  }

  /* ===== FOOTER ===== */
  .footer {
    background: #050810;
    padding-block: var(--space-xl) var(--space-m);
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-l);
    text-align: center;
    margin-block-end: var(--space-l);
  }

  .footer-brand {
    max-width: 300px;
    margin-inline: auto;
  }

  .footer-brand .logo {
    justify-content: center;
    margin-block-end: var(--space-s);
  }

  .footer-brand p {
    font-size: var(--text-sm);
    color: var(--gray-accent);
    margin-block-end: var(--space-m);
  }

  .social-links {
    display: flex;
    justify-content: center;
    gap: var(--space-s);
  }

  .social-link {
    width: var(--touch-target-min);
    height: var(--touch-target-min);
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    color: var(--gray-light);
    transition: all var(--transition-fast);
  }

  .social-link:hover {
    background: var(--electric-blue);
    color: var(--dark-bg);
  }

  .footer-links h4 {
    font-size: var(--text-base);
    margin-block-end: var(--space-s);
  }

  .footer-links ul {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-2xs) var(--space-m);
  }

  .footer-links a {
    color: var(--gray-accent);
    font-size: var(--text-sm);
    padding: var(--space-2xs);
    transition: color var(--transition-fast);
  }

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

  .footer-bottom {
    padding-block-start: var(--space-m);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
  }

  .footer-bottom p {
    font-size: var(--text-xs);
    color: var(--gray-accent);
    max-width: 800px;
    margin-inline: auto;
    line-height: var(--line-height-relaxed);
  }

  /* ===== STICKY MOBILE CTA ===== */
  .sticky-cta {
    position: fixed;
    inset-inline: 0;
    bottom: 0;
    z-index: var(--z-sticky);
    background: rgba(10, 14, 26, 0.98);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: var(--space-s);
    padding-bottom: calc(var(--space-s) + env(safe-area-inset-bottom, 0px));
    border-top: 1px solid rgba(0, 212, 255, 0.3);
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.5);
  }

  .sticky-cta .btn {
    width: 100%;
  }

  body {
    padding-bottom: calc(70px + env(safe-area-inset-bottom, 0px));
  }
}

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

  /* Animations */
  .fade-in,
  .fade-in-left,
  .fade-in-right,
  .scale-in {
    opacity: 1;
    transform: none;
    transition: opacity 0.6s ease, transform 0.6s ease;
  }

  .stagger-1 { transition-delay: 0.1s; }
  .stagger-2 { transition-delay: 0.2s; }
  .stagger-3 { transition-delay: 0.3s; }
  .stagger-4 { transition-delay: 0.4s; }
  .stagger-5 { transition-delay: 0.5s; }
  .stagger-6 { transition-delay: 0.6s; }
}

/* ==================== RESPONSIVE BREAKPOINTS ==================== */
@layer responsive {
  
  /* ===== 375px+ (iPhone SE and up) ===== */
  @media (min-width: 375px) {
    .hero-image img {
      max-width: min(300px, 75vw);
    }
    
    .stat-number {
      font-size: var(--text-3xl);
    }
    
    .testimonial-card {
      padding: var(--space-l);
    }
  }

  /* ===== 480px+ (Large phones) ===== */
  @media (min-width: 480px) {
    .hero-image img {
      max-width: min(340px, 80vw);
    }
    
    .stats-grid {
      gap: var(--space-l) var(--space-m);
    }
    
    .process-cards {
      grid-template-columns: repeat(2, 1fr);
    }
    
    .results-stats {
      grid-template-columns: repeat(3, 1fr);
    }
    
    .testimonial-card {
      flex: 0 0 calc(85% - var(--space-s));
      max-width: 380px;
    }
    
    .team-grid {
      grid-template-columns: repeat(2, 1fr);
      max-width: 100%;
    }
    
    .bonuses-grid {
      grid-template-columns: repeat(2, 1fr);
    }
  }

  /* ===== 640px+ (Small tablets) ===== */
  @media (min-width: 640px) {
    .hero-image img {
      max-width: 380px;
    }
    
    .ingredient-title {
      flex-direction: row;
      align-items: center;
      gap: var(--space-s);
    }
    
    .testimonial-card {
      flex: 0 0 calc(50% - var(--space-s));
      min-width: 300px;
    }
    
    .pricing-grid {
      max-width: 450px;
    }
    
    .footer-grid {
      grid-template-columns: repeat(2, 1fr);
      text-align: left;
    }
    
    .footer-brand {
      grid-column: 1 / -1;
      max-width: none;
      text-align: center;
    }
    
    .footer-links ul {
      flex-direction: column;
      align-items: flex-start;
      gap: 0;
    }
    
    .footer-links li {
      margin-block-end: var(--space-xs);
    }
  }

  /* ===== 768px+ (Tablets) ===== */
  @media (min-width: 768px) {
    /* Navigation */
    .nav-links {
      display: flex;
      position: static;
      flex-direction: row;
      background: transparent;
      padding: 0;
    }
    
    .nav-links li {
      border-bottom: none;
    }
    
    .nav-links a {
      font-size: var(--text-sm);
      min-height: auto;
    }
    
    .menu-toggle {
      display: none;
    }
    
    .header .btn {
      display: inline-flex;
    }
    
    /* Hero */
    .hero {
      min-height: 100vh;
    }
    
    .hero-content {
      flex-direction: row;
      text-align: left;
      gap: var(--space-xl);
    }
    
    .hero-text {
      order: 1;
      flex: 1;
    }
    
    .hero-image {
      order: 2;
      flex: 1;
    }
    
    .hero-image img {
      max-width: 100%;
    }
    
    .hero-subtitle {
      margin-inline: 0;
    }
    
    .hero-trust {
      justify-content: flex-start;
    }
    
    .hero-cta {
      flex-direction: row;
      align-items: center;
    }
    
    .hero-cta .btn {
      width: auto;
      max-width: none;
    }
    
    .scroll-indicator {
      display: block;
    }
    
    /* Stats */
    .stats-grid {
      grid-template-columns: repeat(4, 1fr);
    }
    
    /* Problem */
    .problem-grid {
      flex-direction: row;
      align-items: center;
    }
    
    .problem-visual,
    .problem-content {
      flex: 1;
    }
    
    /* Process Cards */
    .process-cards {
      grid-template-columns: repeat(3, 1fr);
    }
    
    /* Formula */
    .formula-grid {
      flex-direction: row;
      align-items: flex-start;
    }
    
    .formula-image {
      flex: 0 0 40%;
      position: sticky;
      top: 100px;
    }
    
    .formula-image img {
      max-width: 100%;
    }
    
    .ingredients-list {
      flex: 1;
    }
    
    /* Timeline - Desktop Layout */
    .timeline {
      padding-inline-start: 0;
    }
    
    .timeline::before {
      left: 50%;
      transform: translateX(-50%);
    }
    
    .timeline-item {
      width: 50%;
      padding-inline-start: 0;
      padding-inline-end: var(--space-xl);
      margin-inline-start: 0;
    }
    
    .timeline-item:nth-child(even) {
      margin-inline-start: 50%;
      padding-inline-start: var(--space-xl);
      padding-inline-end: 0;
    }
    
    .timeline-marker {
      left: calc(50% - 10px);
    }
    
    /* Results */
    .results-grid {
      flex-direction: row;
      align-items: center;
    }
    
    .results-image {
      flex: 1.2;
    }
    
    .results-stats-wrapper {
      flex: 1;
    }
    
    /* Testimonials */
    .testimonials-container {
      padding-inline: 60px;
    }
    
    .testimonial-nav {
      display: flex;
    }
    
    .testimonial-card {
      flex: 0 0 calc(50% - var(--space-s));
    }
    
    /* Team */
    .team-grid {
      grid-template-columns: repeat(3, 1fr);
    }
    
    /* Comparison Table */
    .comparison-table-wrapper {
      margin-inline: 0;
      padding-inline: 0;
    }
    
    .comparison-table-wrapper::after {
      display: none;
    }
    
    .comparison-table {
      min-width: 100%;
    }
    
    .comparison-table th:first-child,
    .comparison-table td:first-child {
      position: static;
      background: transparent;
    }
    
    /* Pricing */
    .pricing-grid {
      grid-template-columns: repeat(3, 1fr);
      max-width: 100%;
      gap: var(--space-m);
    }
    
    .pricing-card.featured {
      order: 0;
      transform: scale(1.05);
    }
    
    .pricing-card.featured:hover {
      transform: scale(1.08);
    }
    
    /* Bonuses */
    .bonuses-grid {
      grid-template-columns: repeat(3, 1fr);
    }
    
    /* Footer */
    .footer-grid {
      grid-template-columns: 2fr repeat(3, 1fr);
    }
    
    .footer-brand {
      grid-column: auto;
      text-align: left;
    }
    
    .footer-brand .logo {
      justify-content: flex-start;
    }
    
    .social-links {
      justify-content: flex-start;
    }
    
    /* Hide sticky CTA on desktop */
    .sticky-cta {
      display: none;
    }
    
    body {
      padding-bottom: 0;
    }
  }

  /* ===== 1024px+ (Desktop) ===== */
  @media (min-width: 1024px) {
    .nav-links {
      gap: var(--space-l);
    }
    
    .hero-content {
      gap: var(--space-2xl);
    }
    
    .testimonial-card {
      flex: 0 0 calc(33.333% - var(--space-m));
    }
    
    .pricing-grid {
      gap: var(--space-l);
    }
  }

  /* ===== 1200px+ (Large Desktop) ===== */
  @media (min-width: 1200px) {
    .result-value {
      font-size: var(--text-2xl);
    }
  }

  /* ===== HOVER CAPABLE DEVICES ===== */
  @media (hover: hover) and (pointer: fine) {
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow-glow-strong);
    }
    
    .btn-secondary:hover {
      background: var(--electric-blue);
      color: var(--dark-bg);
    }
    
    .pricing-card:hover {
      transform: translateY(-5px);
    }
    
    .pricing-card.featured:hover {
      transform: scale(1.08);
    }
    
    a:hover {
      color: var(--white);
    }
  }

  /* ===== TOUCH DEVICES ===== */
  @media (hover: none) and (pointer: coarse) {
    .btn:active {
      transform: scale(0.98);
    }
    
    .pricing-card:active {
      transform: scale(0.98);
    }
    
    /* Larger touch targets */
    .testimonials-dots {
      gap: var(--space-s);
    }
    
    .faq-question {
      padding-block: var(--space-l);
    }
  }

  /* ===== LANDSCAPE MOBILE ===== */
  @media (max-width: 896px) and (orientation: landscape) {
    .hero {
      min-height: auto;
      padding-block: var(--space-xl);
    }
    
    .hero-content {
      flex-direction: row;
      text-align: left;
    }
    
    .hero-text {
      order: 1;
    }
    
    .hero-image {
      order: 2;
    }
    
    .hero-image img {
      max-width: 250px;
    }
    
    .hero-trust {
      justify-content: flex-start;
    }
    
    .hero-cta {
      flex-direction: row;
    }
    
    .sticky-cta {
      padding: var(--space-xs);
    }
    
    .sticky-cta .btn {
      padding: var(--space-xs) var(--space-m);
      font-size: var(--text-sm);
    }
  }

  /* ===== REDUCED MOTION ===== */
  @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;
    }
    
    .hero-image img {
      animation: none;
    }
    
    .btn-pulse {
      animation: none;
    }
  }

  /* ===== PRINT STYLES ===== */
  @media print {
    .header,
    .sticky-cta,
    .scroll-indicator,
    .testimonial-nav,
    .menu-toggle,
    .hero-bg,
    .solution-bg,
    .final-cta-bg {
      display: none !important;
    }
    
    body {
      background: white;
      color: black;
      padding: 0;
    }
    
    .section {
      page-break-inside: avoid;
    }
    
    a {
      color: black;
      text-decoration: underline;
    }
    
    .text-gradient {
      -webkit-text-fill-color: initial;
      color: var(--navy-primary);
    }
  }

  /* ===== HIGH CONTRAST MODE ===== */
  @media (prefers-contrast: high) {
    :root {
      --gray-accent: #9ca3af;
      --gray-light: #f3f4f6;
    }
    
    .btn {
      border: 2px solid currentColor;
    }
    
    .pricing-card,
    .team-card,
    .process-card {
      border-width: 2px;
    }
  }
}

/* ==================== CHECKOUT PAGE STYLES ==================== */
.checkout-page {
  background: var(--dark-bg);
  min-height: 100vh;
  min-height: 100dvh;
}

.checkout-header {
  background: var(--dark-bg-lighter);
  padding-block: var(--space-s);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.checkout-header .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-s);
}

.checkout-logo img {
  height: clamp(35px, 6vw, 50px);
}

.checkout-progress {
  display: none;
  align-items: center;
  gap: var(--space-s);
}

.progress-step {
  display: flex;
  align-items: center;
  gap: var(--space-2xs);
  color: var(--gray-accent);
  font-size: var(--text-sm);
}

.progress-step.active {
  color: var(--electric-blue);
}

.progress-step-number {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
}

.progress-step.active .progress-step-number {
  background: var(--electric-blue);
  color: var(--dark-bg);
}

.secure-badge {
  display: flex;
  align-items: center;
  gap: var(--space-2xs);
  color: var(--success-green);
  font-size: var(--text-xs);
}

.checkout-main {
  padding-block: var(--space-l);
}

.checkout-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-l);
}

.checkout-order-summary {
  order: -1;
}

.order-summary-card,
.checkout-form-section {
  background: var(--gradient-card);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: var(--space-m);
}

.order-summary-card {
  border-color: rgba(0, 212, 255, 0.2);
}

.order-summary-title,
.form-section-title {
  font-size: var(--text-base);
  margin-block-end: var(--space-m);
  padding-block-end: var(--space-s);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.form-section {
  margin-block-end: var(--space-l);
}

.form-section:last-child {
  margin-block-end: 0;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-s);
  margin-block-end: var(--space-s);
}

.form-group {
  margin-block-end: var(--space-s);
}

.form-group label {
  display: block;
  color: var(--gray-light);
  font-size: var(--text-sm);
  margin-block-end: var(--space-2xs);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: var(--space-s);
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-md);
  color: var(--white);
  font-size: 16px; /* Prevents zoom on iOS */
  transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--electric-blue);
}

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

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

.checkbox-group input[type="checkbox"] {
  width: 20px;
  height: 20px;
  accent-color: var(--electric-blue);
  margin-top: 2px;
  flex-shrink: 0;
}

.checkbox-group label {
  margin: 0;
  font-size: var(--text-sm);
}

.submit-order-btn {
  width: 100%;
  padding: var(--space-m);
  font-size: var(--text-base);
  min-height: 56px;
}

.order-item {
  display: flex;
  gap: var(--space-s);
  margin-block-end: var(--space-m);
  padding-block-end: var(--space-m);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.order-item-image {
  width: 70px;
  height: 70px;
  border-radius: var(--radius-md);
  overflow: hidden;
  flex-shrink: 0;
}

.order-item-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.order-item-details h4 {
  font-size: var(--text-sm);
  margin-block-end: var(--space-3xs);
}

.order-item-details p {
  font-size: var(--text-xs);
  color: var(--gray-accent);
}

.order-totals {
  margin-block-end: var(--space-m);
}

.order-line {
  display: flex;
  justify-content: space-between;
  padding-block: var(--space-2xs);
  color: var(--gray-light);
  font-size: var(--text-sm);
}

.order-line.total {
  font-size: var(--text-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--white);
  padding-block-start: var(--space-s);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-block-start: var(--space-2xs);
}

.order-line.total span:last-child {
  color: var(--electric-blue);
}

.order-trust-indicators {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  padding: var(--space-s);
  background: rgba(0, 212, 255, 0.05);
  border-radius: var(--radius-md);
}

.trust-indicator {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--gray-light);
  font-size: var(--text-xs);
}

.trust-indicator svg {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  color: var(--success-green);
}

/* Checkout Responsive */
@media (min-width: 640px) {
  .checkout-main {
    padding-block: var(--space-xl);
  }
  
  .order-summary-card,
  .checkout-form-section {
    padding: var(--space-l);
  }
  
  .form-row {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 1024px) {
  .checkout-progress {
    display: flex;
  }
  
  .checkout-grid {
    grid-template-columns: 1.2fr 1fr;
    gap: var(--space-xl);
  }
  
  .checkout-order-summary {
    order: 0;
    position: sticky;
    top: 100px;
    align-self: start;
  }
}

/* ==================== MOBILE-SPECIFIC FIXES ==================== */

/* Кнопки с длинным текстом - разрешаем перенос */
.hero-cta .btn-large,
.formula-section .btn-large,
.final-cta-button .btn-large {
  white-space: normal;
  text-align: center;
  line-height: 1.3;
  max-width: 100%;
}

@media (max-width: 480px) {
  .hero-cta .btn-large,
  .formula-section .btn-large,
  .final-cta-button .btn-large {
    font-size: var(--text-sm);
    padding: var(--space-s) var(--space-m);
    gap: var(--space-xs);
  }
  
  .hero-cta .btn-large svg,
  .formula-section .btn-large svg,
  .final-cta-button .btn-large svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
  }
  
  /* Изображения трансформаций - полная ширина */
  .transformation-card-single {
    border-radius: var(--radius-md);
  }
  
  /* Results graph - скролл если нужно */
  .results-image {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  
  .results-image img {
    min-width: 320px;
  }
}

@media (max-width: 375px) {
  .hero-cta .btn-large,
  .formula-section .btn-large,
  .final-cta-button .btn-large {
    font-size: var(--text-xs);
    padding: var(--space-xs) var(--space-s);
  }
}

/* ==================== PERFORMANCE OPTIMIZATIONS ==================== */
.hero,
.stats-bar,
.problem-section,
.solution-section,
.formula-section,
.timeline-section,
.results-section,
.benefits-section,
.testimonials-section,
.team-section,
.comparison-section,
.faq-section,
.pricing-section,
.final-cta-section {
  content-visibility: auto;
  contain-intrinsic-size: auto 500px;
}

/* GPU Acceleration */
.btn,
.pricing-card,
.team-card,
.transformation-card-single,
.process-card,
.hero-image img,
.testimonial-card {
  will-change: transform;
  transform: translateZ(0);
  backface-visibility: hidden;
}

/* Image loading optimization */
img {
  opacity: 1;
  transition: opacity 0.3s ease;
}

img[loading="lazy"] {
  opacity: 0;
}

img[loading="lazy"].loaded,
img:not([loading="lazy"]) {
  opacity: 1;
}