/* CSS Variables - Refined Apple-like Design */
:root {
    /* Colors - High contrast, professional palette */
    --color-bg: #ffffff;
    --color-text: #0f172a;
    --color-text-muted: #475569;
    --color-accent: #2563eb;
    --color-accent-hover: #1d4ed8;
    --color-border: #e2e8f0;
    --color-border-light: #f8fafc;
    --color-success: #059669;
    --color-error: #dc2626;
    
    /* Typography - Clean sans-serif with proper hierarchy */
    --font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-size-xs: 0.75rem;    /* 12px */
    --font-size-sm: 0.875rem;   /* 14px */
    --font-size-base: 1rem;     /* 16px */
    --font-size-lg: 1.125rem;   /* 18px */
    --font-size-xl: 1.25rem;    /* 20px */
    --font-size-2xl: 1.5rem;    /* 24px */
    --font-size-3xl: 1.875rem;  /* 30px */
    --font-size-4xl: 2.25rem;   /* 36px */
    --font-size-5xl: clamp(2.2rem, 5vw, 3rem); /* Responsive H1 */
    
    /* Spacing - Generous whitespace */
    --space-xs: 0.5rem;   /* 8px */
    --space-sm: 0.75rem;  /* 12px */
    --space-md: 1rem;     /* 16px */
    --space-lg: 1.5rem;   /* 24px */
    --space-xl: 2rem;     /* 32px */
    --space-2xl: 3rem;    /* 48px */
    --space-3xl: 4rem;    /* 64px */
    --space-4xl: 6rem;    /* 96px */
    
    /* Layout - Fluid grid system */
    --container-max-width: 1280px;
    --border-radius: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
    --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Transitions - Subtle polish */
    --transition: all 0.15s ease-in-out;
    --transition-slow: all 0.3s ease-in-out;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px; /* Base font size for rem calculations */
}

/* Ensure proper scroll positioning for anchor links */
section[id] {
    scroll-margin-top: 100px; /* Account for fixed header */
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    font-display: swap;
}

/* Container - 12-column fluid grid */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

/* Typography - Clean hierarchy with improved spacing */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--space-lg);
    color: var(--color-text);
    letter-spacing: -0.025em;
}

h1 { 
    font-size: var(--font-size-5xl);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

h2 { 
    font-size: var(--font-size-4xl);
    font-weight: 600;
    letter-spacing: -0.015em;
}

h3 { 
    font-size: var(--font-size-3xl);
    font-weight: 600;
}

h4 { 
    font-size: var(--font-size-2xl);
    font-weight: 600;
}

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

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

p {
    margin-bottom: var(--space-lg);
    color: var(--color-text-muted);
    line-height: 1.6;
    font-size: var(--font-size-base);
}

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

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

/* Buttons - High-contrast CTAs with improved styling */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md) var(--space-xl);
    font-size: var(--font-size-base);
    font-weight: 500;
    border: none;
    border-radius: var(--border-radius-lg);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    min-height: 44px; /* Touch target */
    white-space: nowrap;
    position: relative;
    overflow: hidden;
    letter-spacing: 0.01em;
}

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

.btn--primary:hover {
    background-color: var(--color-accent-hover);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn--secondary {
    background-color: var(--color-bg);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.btn--secondary:hover {
    background-color: var(--color-border-light);
    color: var(--color-text);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-accent);
}

/* Header & Navigation - Enhanced sticky with blur effect */
.header {
    position: sticky;
    top: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: var(--transition);
}

.nav__container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-xl);
    max-width: var(--container-max-width);
    margin: 0 auto;
}

.nav__logo {
    display: flex;
    align-items: center;
    transition: var(--transition);
}

.nav__logo svg {
    width: 40px;
    height: 40px;
    transition: var(--transition);
}

.nav__logo:hover svg {
    transform: scale(1.05);
}

.nav__menu {
    display: flex;
    list-style: none;
    gap: var(--space-2xl);
    align-items: center;
}

.nav__link {
    color: var(--color-text-muted);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    font-size: var(--font-size-sm);
    letter-spacing: 0.01em;
}

.nav__link:hover,
.nav__link--active {
    color: var(--color-text);
}

.nav__link--cta {
    color: var(--color-accent);
    font-weight: 600;
    padding: var(--space-sm) var(--space-lg);
    background-color: var(--color-accent);
    color: white;
    border-radius: var(--border-radius);
    transition: var(--transition);
    white-space: nowrap;
}

.nav__link--cta:hover {
    background-color: var(--color-accent-hover);
    color: white;
    transform: translateY(-1px);
}

/* Language Switcher */
.nav__language-switcher {
    display: flex;
    align-items: center;
    margin-left: var(--space-lg);
    border-left: 1px solid var(--color-border);
    padding-left: var(--space-lg);
}

.nav__language-link {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--border-radius);
    text-decoration: none;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: var(--transition);
    border: 1px solid transparent;
}

.nav__language-link:hover {
    color: var(--color-accent);
    background-color: rgba(37, 99, 235, 0.1);
    border-color: var(--color-accent);
}

.nav__language-flag {
    font-size: var(--font-size-base);
    line-height: 1;
}

.nav__language-text {
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.nav__toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text);
    padding: var(--space-sm);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.nav__toggle:hover {
    background-color: var(--color-border-light);
}

/* Hero Section - Enhanced full-width impact */
.hero {
    padding: var(--space-4xl) 0;
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-border-light) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 80%, rgba(37, 99, 235, 0.05) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(37, 99, 235, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.hero__container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--space-xl);
    position: relative;
    z-index: 1;
}

.hero__title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--space-xl);
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.hero__subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-text-muted);
    margin-bottom: var(--space-3xl);
    line-height: 1.5;
    font-weight: 400;
}

.hero__cta {
    display: flex;
    gap: var(--space-lg);
    flex-wrap: wrap;
}

.hero__image {
    position: relative;
}

.hero__image img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-xl);
    transition: var(--transition-slow);
}

.hero__image:hover img {
    transform: scale(1.02);
}



/* Books Section */
.books {
    padding: var(--space-4xl) 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    position: relative;
    overflow: hidden;
}

.books::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23e2e8f0" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
    pointer-events: none;
}

.books__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--space-3xl);
    position: relative;
    z-index: 1;
}

.book-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-xl);
    overflow: hidden;
    transition: var(--transition-slow);
    box-shadow: var(--shadow-md);
}

.book-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-accent);
}

.book-card__image {
    width: 100%;
    height: 300px;
    overflow: hidden;
    background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.book-card__image img {
    max-width: 80%;
    max-height: 80%;
    object-fit: contain;
    transition: var(--transition-slow);
}

.book-card:hover .book-card__image img {
    transform: scale(1.05);
}

.book-card__content {
    padding: var(--space-3xl);
}

.book-card__title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--space-lg);
    line-height: 1.2;
}

.book-card__description {
    font-size: var(--font-size-base);
    color: var(--color-text-muted);
    margin-bottom: var(--space-xl);
    line-height: 1.6;
}

.book-card__features {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-bottom: var(--space-xl);
}

.book-card__feature {
    font-size: var(--font-size-sm);
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.book-card__feature::before {
    content: '✓';
    color: var(--color-success);
    font-weight: bold;
    font-size: var(--font-size-base);
}

.book-card__meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-lg);
    padding: var(--space-lg);
    background: var(--color-border-light);
    border-radius: var(--border-radius);
}

.book-card__info {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.book-card__price {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-accent);
}

.book-card__pricing {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-xs);
}

.book-card__price--discounted {
    color: var(--color-success);
    font-size: var(--font-size-2xl);
}

.book-card__price--original {
    color: var(--color-text-muted);
    text-decoration: line-through;
    font-size: var(--font-size-lg);
}

.book-card__early-bird {
    background: linear-gradient(135deg, var(--color-success), #047857);
    color: white;
    font-size: var(--font-size-xs);
    font-weight: 600;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--border-radius);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.book-card__tax {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    font-style: italic;
}

.book-card__format {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.book-card__actions {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
    flex-wrap: wrap;
}

/* Section Titles - Enhanced centered styling */
.section__title {
    text-align: center;
    margin-bottom: var(--space-4xl);
    color: var(--color-text);
    font-weight: 600;
    letter-spacing: -0.025em;
    position: relative;
}

.section__title::after {
    content: '';
    position: absolute;
    bottom: -4rem;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-hover));
    border-radius: 2px;
}

/* Enhanced spacing for better visual rhythm */
.services,
.process,
.whyus,
.books,
.about,
.contact {
    position: relative;
}

.services::before,
.process::before,
.whyus::before,
.books::before,
.about::before,
.contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-border), transparent);
}

/* Services Section - Enhanced clean card grid */
.services {
    padding: var(--space-4xl) 0;
}

.services__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-2xl);
    margin-bottom: var(--space-4xl);
}

.service-card {
    padding: var(--space-3xl);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-xl);
    text-align: center;
    transition: var(--transition-slow);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-hover));
    transform: scaleX(0);
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-accent);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card__icon {
    color: var(--color-accent);
    margin-bottom: var(--space-xl);
    display: inline-flex;
    padding: var(--space-lg);
    background: var(--color-border-light);
    border-radius: var(--border-radius-lg);
    transition: var(--transition);
}

.service-card:hover .service-card__icon {
    background: var(--color-accent);
    color: white;
    transform: scale(1.1);
}

.service-card__title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-lg);
    color: var(--color-text);
    font-weight: 600;
}

.service-card__description {
    color: var(--color-text-muted);
    margin-bottom: var(--space-xl);
    line-height: 1.6;
}

.service-card__link {
    color: var(--color-accent);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    transition: var(--transition);
}

.service-card__link:hover {
    gap: var(--space-sm);
}

/* Packages Section - Enhanced pricing cards */
.packages {
    margin-top: var(--space-4xl);
}

.packages__title {
    text-align: center;
    font-size: var(--font-size-3xl);
    margin-bottom: var(--space-lg);
    color: var(--color-text);
    font-weight: 600;
}

.packages__subtitle {
    text-align: center;
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-4xl);
    color: var(--color-text-muted);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

.packages__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-2xl);
}

.package-card {
    padding: var(--space-3xl);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-xl);
    text-align: center;
    transition: var(--transition-slow);
    position: relative;
}

.package-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.package-card--highlight {
    border-color: var(--color-accent);
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-border-light) 100%);
    position: relative;
}

.package-card--highlight::before {
    content: 'Most Popular';
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-accent);
    color: white;
    padding: var(--space-xs) var(--space-lg);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.package-card__title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-sm);
    color: var(--color-text);
    font-weight: 600;
}

.package-card__description {
    color: var(--color-text-muted);
    margin-bottom: var(--space-xl);
}

.package-card__price {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
}

.package-card__timeline {
    color: var(--color-text-muted);
    margin-bottom: var(--space-xl);
    font-size: var(--font-size-sm);
}

.package-card__features {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-bottom: var(--space-2xl);
    text-align: left;
}

.package-card__feature {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    line-height: 1.4;
}

.package-card__feature::before {
    content: '✓';
    color: var(--color-success);
    font-weight: 600;
    flex-shrink: 0;
}

.package-card__guarantee {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    background: linear-gradient(135deg, var(--color-success) 0%, #047857 100%);
    color: white;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--border-radius);
    font-size: var(--font-size-xs);
    font-weight: 600;
    margin-bottom: var(--space-lg);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.package-card__guarantee svg {
    color: white;
    flex-shrink: 0;
}

/* Process Section - Enhanced step-by-step */
.process {
    padding: var(--space-4xl) 0;
    background: var(--color-border-light);
}

.process__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-3xl);
}

.process-step {
    text-align: center;
    padding: var(--space-2xl);
    position: relative;
}

.process-step__number {
    width: 80px;
    height: 80px;
    background: var(--color-accent);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin: 0 auto var(--space-xl);
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
}

.process-step:hover .process-step__number {
    transform: scale(1.1);
    box-shadow: var(--shadow-xl);
}

.process-step__title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-lg);
    color: var(--color-text);
    font-weight: 600;
}

.process-step__description {
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* Why Choose Us Section - Enhanced trust elements */
.whyus {
    padding: var(--space-4xl) 0;
}

.whyus__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-2xl);
}

.reason-card {
    padding: var(--space-2xl);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    text-align: center;
    transition: var(--transition);
    position: relative;
}

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

.reason-card__icon {
    color: var(--color-accent);
    margin-bottom: var(--space-lg);
    display: inline-flex;
    padding: var(--space-md);
    background: var(--color-border-light);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.reason-card:hover .reason-card__icon {
    background: var(--color-accent);
    color: white;
}

.reason-card__title {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-md);
    color: var(--color-text);
    font-weight: 600;
}

.reason-card__description {
    color: var(--color-text-muted);
    line-height: 1.6;
}

.reason-card--highlight {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
    color: white;
    transform: scale(1.05);
    box-shadow: var(--shadow-xl);
}

.reason-card--highlight .reason-card__title,
.reason-card--highlight .reason-card__description {
    color: white;
}

.reason-card--highlight .reason-card__icon {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.reason-card--highlight:hover {
    transform: scale(1.08);
    box-shadow: 0 25px 50px -12px rgb(0 0 0 / 0.25);
}

/* Testimonial Section - Enhanced pull-quote style */
.testimonial {
    padding: var(--space-4xl) 0;
    background: var(--color-border-light);
}

.testimonial__content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    padding: var(--space-3xl);
    background: var(--color-bg);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-border);
    position: relative;
}

.testimonial__quote {
    font-size: var(--font-size-2xl);
    font-style: italic;
    color: var(--color-text);
    margin-bottom: var(--space-xl);
    position: relative;
    line-height: 1.5;
}

.testimonial__quote::before {
    content: '"';
    font-size: var(--font-size-5xl);
    color: var(--color-accent);
    position: absolute;
    top: -20px;
    left: -20px;
    font-family: serif;
}

.testimonial__author {
    display: block;
}

.testimonial__name {
    font-weight: 600;
    color: var(--color-text);
    display: block;
    font-size: var(--font-size-lg);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.testimonial__company {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    margin-top: var(--space-xs);
}

/* Guarantee Section - Prominent trust indicator */
.guarantee {
    padding: var(--space-4xl) 0;
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.guarantee::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="2" fill="rgba(255,255,255,0.1)"/></svg>') repeat;
    opacity: 0.3;
}

.guarantee__content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.guarantee__badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    margin-bottom: var(--space-xl);
    color: white;
}

.guarantee__badge svg {
    width: 40px;
    height: 40px;
}

.guarantee__title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--space-lg);
    color: white;
}

.guarantee__description {
    font-size: var(--font-size-lg);
    line-height: 1.7;
    margin-bottom: var(--space-3xl);
    color: rgba(255, 255, 255, 0.9);
}

.guarantee__details {
    display: flex;
    justify-content: center;
    gap: var(--space-2xl);
    margin-bottom: var(--space-3xl);
    flex-wrap: wrap;
}

.guarantee__detail {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-base);
    color: white;
}

.guarantee__detail svg {
    color: white;
    flex-shrink: 0;
}

.guarantee__cta {
    background: white;
    color: var(--color-accent);
    font-weight: 600;
    padding: var(--space-lg) var(--space-2xl);
    border-radius: var(--border-radius-lg);
    text-decoration: none;
    display: inline-block;
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
}

.guarantee__cta:hover {
    background: var(--color-border-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

/* About Section - Enhanced personal touch */
.about {
    padding: var(--space-4xl) 0;
}

.about__content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-4xl);
    align-items: start;
}

.about__bio {
    font-size: var(--font-size-lg);
    line-height: 1.7;
    margin-bottom: var(--space-3xl);
    color: var(--color-text-muted);
}

.about__values-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-xl);
    color: var(--color-text);
    font-weight: 600;
}

.about__values {
    list-style: none;
}

.about__values li {
    padding: var(--space-lg) 0;
    border-bottom: 1px solid var(--color-border-light);
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
}

.about__values li:last-child {
    border-bottom: none;
}

.about__values li strong {
    color: var(--color-text);
    font-weight: 600;
}

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

.about__avatar {
    width: 240px;
    height: 240px;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: var(--shadow-xl);
    border: 6px solid var(--color-bg);
    transition: var(--transition);
}

.about__avatar:hover {
    transform: scale(1.05);
}

/* Contact Section - Enhanced clear call-to-action */
.contact {
    padding: var(--space-4xl) 0;
    background: var(--color-border-light);
}

.contact__content {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    text-align: center;
}

.contact__subtitle {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-xl);
    color: var(--color-text);
    font-weight: 600;
}

.contact__channels {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
    align-items: center;
}

.contact__channel {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    color: var(--color-text);
    font-weight: 500;
    font-size: var(--font-size-lg);
    padding: var(--space-md) var(--space-lg);
    background: var(--color-bg);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--color-border);
    transition: var(--transition);
    min-width: 280px;
    justify-content: center;
}

.contact__channel:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Case Study Page Styles */
.main {
    padding: var(--space-4xl) 0;
    min-height: calc(100vh - 200px);
}

.content-wrapper {
    max-width: 800px;
    margin: 0 auto;
}

.page-header {
    text-align: center;
    margin-bottom: var(--space-4xl);
    padding-bottom: var(--space-2xl);
    border-bottom: 1px solid var(--color-border);
}

.page-header h1 {
    margin-bottom: var(--space-lg);
    color: var(--color-text);
}

.page-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
    margin-bottom: var(--space-2xl);
}

.back-link {
    margin-top: var(--space-xl);
}

.back-link__button {
    display: inline-flex;
    align-items: center;
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-border-light);
    color: var(--color-text);
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 500;
    transition: var(--transition);
    border: 1px solid var(--color-border);
}

.back-link__button:hover {
    background: var(--color-border);
    transform: translateY(-1px);
}

.case-study-content {
    line-height: 1.7;
}

.case-study-content h2 {
    font-size: var(--font-size-2xl);
    margin-top: var(--space-3xl);
    margin-bottom: var(--space-xl);
    color: var(--color-accent);
    border-bottom: 2px solid var(--color-accent);
    padding-bottom: var(--space-sm);
}

.case-study-content h3 {
    font-size: var(--font-size-xl);
    margin-top: var(--space-2xl);
    margin-bottom: var(--space-lg);
    color: var(--color-text);
}

.case-study__intro {
    margin-bottom: var(--space-3xl);
}

.case-study__intro p {
    font-size: var(--font-size-lg);
    color: var(--color-text);
    margin-bottom: var(--space-xl);
}

.case-study__questions {
    background: var(--color-border-light);
    padding: var(--space-xl);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--color-border);
    margin: var(--space-xl) 0;
}

.case-study__questions li {
    font-size: var(--font-size-base);
    color: var(--color-text);
    margin-bottom: var(--space-md);
    font-weight: 500;
}

.case-study__questions li:last-child {
    margin-bottom: 0;
}

.case-study__result-item {
    background: var(--color-bg);
    padding: var(--space-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
    margin-bottom: var(--space-lg);
    transition: var(--transition);
}

.case-study__result-item:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.case-study__result-item h3 {
    color: var(--color-accent);
    margin-bottom: var(--space-md);
    font-size: var(--font-size-lg);
}

.case-study__result-item p {
    color: var(--color-text);
    line-height: 1.7;
}

.case-study__quotes {
    margin: var(--space-3xl) 0;
}

.case-study__quote {
    background: var(--color-bg);
    padding: var(--space-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    border-left: 4px solid var(--color-accent);
    margin-bottom: var(--space-lg);
    transition: var(--transition);
}

.case-study__quote:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.case-study__quote blockquote {
    font-size: var(--font-size-lg);
    font-style: italic;
    color: var(--color-text);
    margin-bottom: var(--space-md);
    line-height: 1.6;
    position: relative;
}

.case-study__quote blockquote::before {
    content: '"';
    font-size: 3rem;
    color: var(--color-accent);
    position: absolute;
    top: -0.5rem;
    left: -1rem;
    font-family: serif;
    opacity: 0.3;
}

.case-study__quote cite {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    font-style: normal;
    font-weight: 500;
}

.case-study__conclusions {
    background: var(--color-border-light);
    padding: var(--space-2xl);
    border-radius: var(--border-radius-xl);
    border: 1px solid var(--color-accent);
    margin: var(--space-3xl) 0;
}

.case-study__conclusion-list {
    margin-bottom: var(--space-xl);
}

.case-study__conclusion-list li {
    font-size: var(--font-size-base);
    color: var(--color-text);
    margin-bottom: var(--space-md);
    line-height: 1.6;
}

.case-study__conclusions p {
    font-size: var(--font-size-lg);
    color: var(--color-text);
    text-align: center;
    font-weight: 500;
    line-height: 1.6;
}

.case-study__cta {
    text-align: center;
    padding: var(--space-3xl);
    margin-top: var(--space-4xl);
}

.case-study__cta .btn {
    background: var(--color-accent);
    color: white;
    font-weight: 600;
    padding: var(--space-lg) var(--space-3xl);
    font-size: var(--font-size-xl);
    border-radius: var(--border-radius-lg);
    transition: var(--transition);
    display: inline-block;
    text-decoration: none;
}

.case-study__cta .btn:hover {
    background: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Footer - Enhanced balanced structure */
.footer {
    background: var(--color-text);
    color: white;
    padding: var(--space-3xl) 0;
}

.footer__content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-3xl);
    margin-bottom: var(--space-3xl);
}

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

.footer__title {
    color: white;
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--space-lg);
    letter-spacing: 0.01em;
}

.footer__nav {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.footer__nav a {
    color: #cbd5e1;
    transition: var(--transition);
    font-weight: 500;
    font-size: var(--font-size-sm);
}

.footer__nav a:hover {
    color: white;
    transform: translateX(4px);
}

.footer__company p {
    color: #cbd5e1;
    margin-bottom: var(--space-sm);
    font-size: var(--font-size-sm);
    line-height: 1.5;
}

.footer__company p:last-child {
    margin-bottom: 0;
}

.footer__company strong {
    color: white;
    font-weight: 600;
}

.footer__contact {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.footer__contact a {
    color: #cbd5e1;
    transition: var(--transition);
    font-weight: 500;
    font-size: var(--font-size-sm);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.footer__contact a:hover {
    color: white;
    transform: translateX(4px);
}

.footer__contact a::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--color-accent);
    border-radius: 50%;
    flex-shrink: 0;
}

.footer__bottom {
    padding-top: var(--space-2xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer__bottom p {
    color: #cbd5e1;
    font-size: var(--font-size-sm);
    margin: 0;
}

/* Animations - Enhanced subtle polish */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.animate-in {
    animation: fadeInUp 0.6s ease-out forwards;
}

/* Enhanced hover effects */
.service-card:hover .service-card__icon svg,
.reason-card:hover .reason-card__icon svg {
    transform: scale(1.1) rotate(5deg);
    transition: transform 0.3s ease;
}

.package-card--highlight:hover {
    animation: pulse 2s infinite;
}

/* Smooth scroll behavior enhancement */
html {
    scroll-behavior: smooth;
    scroll-padding-top: 100px; /* Account for sticky header */
}

/* Responsive Design - Enhanced mobile-first approach */
@media (max-width: 1024px) {
    .hero__container {
        gap: var(--space-3xl);
    }
    
    .about__content {
        gap: var(--space-3xl);
    }
}

@media (max-width: 768px) {
    /* Navigation */
    .nav__menu {
        position: fixed;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-bg);
        flex-direction: column;
        padding: var(--space-3xl);
        border-top: 1px solid var(--color-border);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition-slow);
        box-shadow: var(--shadow-lg);
    }

    .nav__menu--open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav__toggle {
        display: block;
    }

    .nav__menu {
        gap: var(--space-lg);
    }
    
    .nav__language-switcher {
        margin-left: 0;
        border-left: none;
        padding-left: 0;
        border-top: 1px solid var(--color-border);
        padding-top: var(--space-md);
        margin-top: var(--space-md);
    }

    /* Hero */
    .hero__container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--space-3xl);
    }

    .hero__title {
        font-size: var(--font-size-4xl);
    }

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

    .hero__cta {
        justify-content: center;
    }
    
    .books__grid {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }
    
    .book-card__content {
        padding: var(--space-2xl);
    }
    
    .book-card__title {
        font-size: var(--font-size-xl);
    }
    
    .book-card__description {
        font-size: var(--font-size-sm);
    }
    
    .book-card__meta {
        flex-direction: column;
        gap: var(--space-lg);
        text-align: center;
    }
    
    .book-card__actions {
        flex-direction: column;
        align-items: stretch;
    }
    
    .book-card__info {
        align-items: center;
    }
    
    .book-card__pricing {
        flex-direction: column;
        gap: var(--space-xs);
        text-align: center;
    }
    
    .book-card__price--discounted {
        font-size: var(--font-size-xl);
    }
    
    .book-card__price--original {
        font-size: var(--font-size-base);
    }
    
    .book-card__early-bird {
        font-size: 0.625rem;
        padding: 0.25rem 0.5rem;
    }

    /* Services & Packages */
    .services__grid,
    .packages__grid {
        grid-template-columns: 1fr;
    }

    .service-card,
    .package-card {
        padding: var(--space-2xl);
    }

    /* Process */
    .process__grid {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }

    /* Why Choose Us */
    .whyus__grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-lg);
    }
    
    /* Guarantee */
    .guarantee__details {
        flex-direction: column;
        gap: var(--space-lg);
    }
    
    .guarantee__title {
        font-size: var(--font-size-3xl);
    }
    
    .guarantee__description {
        font-size: var(--font-size-base);
    }

    /* About */
    .about__content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--space-2xl);
    }

    .about__avatar {
        width: 200px;
        height: 200px;
    }

    /* Contact */
    .contact__channel {
        min-width: 240px;
        font-size: var(--font-size-base);
    }

    /* Footer */
    .footer__content {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
        text-align: center;
    }

    .footer__section {
        align-items: center;
    }

    .footer__nav {
        align-items: center;
    }

    .footer__contact {
        align-items: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-lg);
    }

    .hero__title {
        font-size: var(--font-size-3xl);
    }

    .section__title {
        font-size: var(--font-size-2xl);
    }

    .btn {
        width: 100%;
    }

    .hero__cta {
        flex-direction: column;
        gap: var(--space-md);
    }

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

    .contact__channel {
        min-width: 200px;
        flex-direction: column;
        gap: var(--space-sm);
    }

    .service-card,
    .package-card,
    .reason-card {
        padding: var(--space-xl);
    }

    .section__title::after {
        width: 40px;
        height: 2px;
        bottom: -3rem;
    }
}

/* Accessibility - Enhanced user preferences */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles - Enhanced clear and visible */
*:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* High contrast mode */
@media (prefers-contrast: high) {
    :root {
        --color-border: #000000;
        --color-text-muted: #000000;
        --color-border-light: #ffffff;
    }
}

/* Dark mode support (if needed in future) */
@media (prefers-color-scheme: dark) {
    /* Dark mode styles can be added here */
}