/* ========================================
   YOUTHFUL BRAIN - MODERN GRADIENT DESIGN
   Mobile-First Responsive CSS
   ======================================== */

/* === CSS VARIABLES === */
:root {
    /* Colors - Modern Gradient Theme */
    --primary-blue: #1E40AF;
    --primary-light: #3B82F6;
    --primary-lighter: #93C5FD;
    --accent-cyan: #06B6D4;
    --accent-green: #10B981;
    --accent-teal: #14B8A6;
    
    --gradient-primary: linear-gradient(135deg, #1E40AF 0%, #3B82F6 50%, #06B6D4 100%);
    --gradient-accent: linear-gradient(135deg, #06B6D4 0%, #10B981 100%);
    --gradient-hero: linear-gradient(135deg, rgba(30, 64, 175, 0.05) 0%, rgba(6, 182, 212, 0.05) 100%);
    
    --text-dark: #1F2937;
    --text-gray: #6B7280;
    --text-light: #9CA3AF;
    --bg-white: #FFFFFF;
    --bg-light: #F9FAFB;
    --bg-gray: #F3F4F6;
    
    /* Typography */
    --font-heading: 'Playfair Display', serif;
    --font-body: 'Poppins', sans-serif;
    
    /* Spacing */
    --container-max: 1200px;
    --section-padding: 80px 20px;
    --section-padding-mobile: 60px 20px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* === RESET & BASE === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    color: var(--text-dark);
    line-height: 1.7;
    background: var(--bg-white);
    overflow-x: hidden;
}

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

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

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

input, select, textarea {
    font-size: 16px; /* Prevent zoom on iOS */
}

/* === CONTAINER === */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

/* === TYPOGRAPHY === */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-dark);
}

h1 { font-size: 2.5rem; } /* 40px */
h2 { font-size: 2rem; } /* 32px */
h3 { font-size: 1.5rem; } /* 24px */
h4 { font-size: 1.25rem; } /* 20px */

p {
    line-height: 1.7;
    color: var(--text-gray);
}

/* Mobile Typography */
@media (max-width: 768px) {
    h1 { font-size: 1.75rem; } /* 28px */
    h2 { font-size: 1.5rem; } /* 24px */
    h3 { font-size: 1.25rem; } /* 20px */
    h4 { font-size: 1.125rem; } /* 18px */
}

/* === SECTION STYLES === */
.section-title {
    text-align: center;
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    text-align: center;
    color: var(--text-gray);
    font-size: 1.125rem;
    margin-bottom: 3rem;
}

/* === BUTTONS === */
.btn-primary,
.btn-hero,
.btn-final-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px 32px;
    min-height: 48px;
    background: var(--gradient-primary);
    color: white;
    font-weight: 600;
    border-radius: 50px;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
    text-align: center;
    gap: 8px;
}

.btn-primary:hover,
.btn-hero:hover,
.btn-final-cta:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.btn-primary:active,
.btn-hero:active,
.btn-final-cta:active {
    transform: scale(0.98);
}

.btn-hero {
    font-size: 1.125rem;
    padding: 20px 40px;
}

.btn-arrow {
    font-size: 1.5rem;
    transition: transform var(--transition-base);
}

.btn-hero:hover .btn-arrow,
.btn-final-cta:hover .btn-arrow {
    transform: translateX(5px);
}

/* === NAVIGATION === */
#navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all var(--transition-base);
}

#navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-md);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.5rem;
    font-weight: 700;
    font-family: var(--font-heading);
}

.logo-icon {
    font-size: 2rem;
}

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

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    color: var(--text-dark);
    font-weight: 500;
    transition: color var(--transition-base);
}

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

.nav-cta {
    padding: 12px 24px;
    min-height: 44px;
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    width: 30px;
    height: 30px;
    cursor: pointer;
}

.hamburger span {
    display: block;
    width: 100%;
    height: 3px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-links {
        position: fixed;
        top: 72px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 72px);
        background: white;
        flex-direction: column;
        padding: 40px 20px;
        gap: 24px;
        transition: left var(--transition-base);
        box-shadow: var(--shadow-lg);
    }
    
    .nav-links.active {
        left: 0;
    }
    
    .nav-link {
        font-size: 1.25rem;
        width: 100%;
        text-align: center;
        padding: 12px;
    }
    
    .nav-cta {
        width: 100%;
    }
}

/* === HERO SECTION === */
.hero-section {
    padding: 140px 0 80px;
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-image {
    position: relative;
}

.product-showcase {
    position: relative;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    25% {
        transform: translateY(-20px) rotate(2deg);
    }
    50% {
        transform: translateY(0) rotate(0deg);
    }
    75% {
        transform: translateY(-15px) rotate(-2deg);
    }
}

.product-bottle {
    position: relative;
    z-index: 2;
    filter: drop-shadow(0 20px 40px rgba(30, 64, 175, 0.2));
    animation: productGlow 3s ease-in-out infinite;
}

@keyframes productGlow {
    0%, 100% {
        filter: drop-shadow(0 20px 40px rgba(30, 64, 175, 0.2));
    }
    50% {
        filter: drop-shadow(0 25px 50px rgba(6, 182, 212, 0.3));
    }
}

.glow-effect {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120%;
    height: 120%;
    background: var(--gradient-primary);
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.3;
    animation: pulse 4s ease-in-out infinite;
    z-index: 1;
}

@keyframes pulse {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.3;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.2);
        opacity: 0.5;
    }
}

.hero-content {
    animation: fadeInUp 1s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-title {
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

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

.hero-description {
    margin-bottom: 1.5rem;
    font-size: 1.125rem;
}

.hero-features {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 2rem;
}

.feature-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    background: white;
    padding: 8px 16px;
    border-radius: 50px;
    box-shadow: var(--shadow-sm);
    font-size: 0.875rem;
    font-weight: 500;
}

.badge-icon {
    color: var(--accent-green);
    font-weight: 700;
}

/* Mobile Hero */
@media (max-width: 768px) {
    .hero-section {
        padding: 100px 0 60px;
    }
    
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .hero-image {
        order: -1;
    }
    
    .btn-hero {
        width: 100%;
        font-size: 1rem;
    }
}

/* === WHY CHOOSE SECTION === */
.why-section {
    padding: var(--section-padding);
    background: var(--bg-white);
}

.why-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.why-card {
    background: white;
    padding: 40px 30px;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

.why-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.why-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 20px;
}

.why-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.why-card h3 {
    margin-bottom: 1rem;
    color: var(--primary-blue);
}

.why-card p {
    font-size: 0.9375rem;
}

/* Mobile Why Choose */
@media (max-width: 768px) {
    .why-section {
        padding: var(--section-padding-mobile);
    }
    
    .why-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

@media (min-width: 576px) and (max-width: 991px) {
    .why-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* === WHAT IS SECTION === */
.what-section {
    padding: var(--section-padding);
    background: var(--bg-light);
}

.what-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.what-text {
    margin-bottom: 1.5rem;
    font-size: 1.0625rem;
}

.support-image {
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
}

/* Mobile What Is */
@media (max-width: 768px) {
    .what-section {
        padding: var(--section-padding-mobile);
    }
    
    .what-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .what-image {
        order: -1;
    }
}

/* === HOW IT WORKS SECTION === */
.how-section {
    padding: var(--section-padding);
    background: var(--bg-white);
}

.accordion-container {
    max-width: 900px;
    margin: 0 auto;
}

.accordion-item {
    background: white;
    border-radius: 12px;
    margin-bottom: 16px;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    border: 2px solid transparent;
    transition: all var(--transition-base);
}

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

.accordion-header {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px;
    background: white;
    cursor: pointer;
    min-height: 44px;
    transition: all var(--transition-base);
}

.accordion-header:hover {
    background: var(--bg-light);
}

.accordion-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-dark);
    text-align: left;
}

.accordion-icon {
    font-size: 1.5rem;
    color: var(--primary-blue);
    font-weight: 300;
    transition: transform var(--transition-base);
}

.accordion-item.active .accordion-icon {
    transform: rotate(45deg);
}

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

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

.accordion-content p {
    padding: 0 24px 24px;
    line-height: 1.8;
}

/* Mobile Accordion */
@media (max-width: 768px) {
    .how-section {
        padding: var(--section-padding-mobile);
    }
    
    .accordion-header {
        padding: 20px;
    }
    
    .accordion-title {
        font-size: 1rem;
    }
}

/* === REVIEWS SECTION === */
.reviews-section {
    padding: var(--section-padding);
    background: var(--gradient-hero);
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.review-card {
    background: white;
    padding: 30px;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    opacity: 0;
    transform: translateX(-50px);
    animation: slideInReview 0.8s ease-out forwards;
}

.review-card:nth-child(1) {
    animation-delay: 0.2s;
}

.review-card:nth-child(2) {
    animation-delay: 0.4s;
}

.review-card:nth-child(3) {
    animation-delay: 0.6s;
}

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

.review-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

.review-header {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
}

.reviewer-photo {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--primary-lighter);
}

.reviewer-info {
    flex: 1;
}

.reviewer-name {
    font-size: 1.125rem;
    margin-bottom: 4px;
    color: var(--text-dark);
}

.reviewer-location {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-bottom: 8px;
}

.star-rating {
    color: #FCD34D;
    font-size: 1.125rem;
    letter-spacing: 2px;
}

.review-text {
    font-size: 0.9375rem;
    line-height: 1.7;
    color: var(--text-gray);
}

/* Mobile Reviews */
@media (max-width: 768px) {
    .reviews-section {
        padding: var(--section-padding-mobile);
    }
    
    .reviews-grid {
        grid-template-columns: 1fr;
    }
}

/* === PRICING SECTION === */
.pricing-section {
    padding: var(--section-padding);
    background: var(--bg-white);
}

.countdown-timer {
    max-width: 400px;
    margin: 0 auto 3rem;
    background: var(--gradient-accent);
    color: white;
    padding: 20px;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.timer-label {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.timer-display {
    font-size: 3rem;
    font-weight: 700;
    font-family: var(--font-heading);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 3rem;
}

.pricing-card {
    background: white;
    border-radius: 20px;
    padding: 30px;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    border: 3px solid transparent;
    position: relative;
}

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.pricing-card.popular {
    background: var(--gradient-hero);
    border-color: var(--primary-blue);
    transform: scale(1.05);
}

.pricing-card.popular:hover {
    transform: scale(1.08) translateY(-10px);
}

.popular-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-accent);
    color: white;
    padding: 8px 24px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.package-label {
    text-align: center;
    font-weight: 700;
    font-size: 0.875rem;
    color: var(--primary-blue);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.package-bottles {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.package-supply {
    text-align: center;
    color: var(--text-gray);
    margin-bottom: 20px;
}

.package-image {
    text-align: center;
    margin: 20px 0;
}

.package-image img {
    max-width: 180px;
    margin: 0 auto;
}

.package-price {
    text-align: center;
    margin-bottom: 12px;
}

.price-per {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-blue);
    font-family: var(--font-heading);
}

.price-label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-gray);
}

.package-total {
    text-align: center;
    margin-bottom: 20px;
}

.old-price {
    font-size: 1.25rem;
    color: var(--text-light);
    text-decoration: line-through;
    margin-right: 12px;
}

.new-price {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--accent-green);
    font-family: var(--font-heading);
}

.bonus-badges {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 20px;
}

.bonus-badge {
    background: var(--gradient-accent);
    color: white;
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    text-align: center;
}

.btn-add-cart {
    display: block;
    margin-bottom: 16px;
    transition: transform var(--transition-base);
}

.btn-add-cart:hover {
    transform: scale(1.05);
}

.btn-add-cart img {
    width: 100%;
    max-width: 250px;
    margin: 0 auto;
}

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

.payment-logos img {
    max-width: 200px;
    margin: 0 auto;
}

.rating-image {
    text-align: center;
    margin-top: 2rem;
}

.rating-image img {
    max-width: 300px;
    margin: 0 auto;
}

/* Mobile Pricing */
@media (max-width: 768px) {
    .pricing-section {
        padding: var(--section-padding-mobile);
    }
    
    .timer-display {
        font-size: 2.5rem;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-card.popular {
        transform: scale(1);
    }
    
    .pricing-card.popular:hover {
        transform: translateY(-10px);
    }
}

@media (min-width: 576px) and (max-width: 991px) {
    .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* === BONUS SECTION === */
.bonus-section {
    padding: var(--section-padding);
    background: var(--bg-light);
}

.bonus-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.bonus-card {
    background: white;
    padding: 30px;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: all var(--transition-base);
}

.bonus-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.bonus-image {
    margin-bottom: 20px;
}

.bonus-image img {
    border-radius: 12px;
}

.bonus-title {
    color: var(--primary-blue);
    margin-bottom: 1rem;
}

.bonus-description {
    color: var(--text-gray);
}

/* Mobile Bonus */
@media (max-width: 768px) {
    .bonus-section {
        padding: var(--section-padding-mobile);
    }
    
    .bonus-grid {
        grid-template-columns: 1fr;
    }
}

/* === INGREDIENTS SECTION === */
.ingredients-section {
    padding: var(--section-padding);
    background: var(--bg-white);
}

.ingredients-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.ingredient-card {
    background: white;
    padding: 24px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--primary-blue);
    transition: all var(--transition-base);
}

.ingredient-card:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-md);
    border-left-color: var(--accent-cyan);
}

.ingredient-card h3 {
    color: var(--primary-blue);
    margin-bottom: 12px;
    font-size: 1.125rem;
}

.ingredient-card p {
    font-size: 0.9375rem;
}

/* Mobile Ingredients */
@media (max-width: 768px) {
    .ingredients-section {
        padding: var(--section-padding-mobile);
    }
    
    .ingredients-grid {
        grid-template-columns: 1fr;
    }
}

/* === SCIENCE SECTION === */
.science-section {
    padding: var(--section-padding);
    background: var(--bg-light);
}

.science-accordion {
    max-width: 900px;
    margin: 0 auto;
}

.science-item {
    background: white;
    border-radius: 12px;
    margin-bottom: 16px;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.science-header {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px;
    background: white;
    cursor: pointer;
    min-height: 44px;
    transition: all var(--transition-base);
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--text-dark);
    text-align: left;
}

.science-header:hover {
    background: var(--bg-light);
}

.science-icon {
    font-size: 1.5rem;
    color: var(--primary-blue);
    transition: transform var(--transition-base);
}

.science-item.active .science-icon {
    transform: rotate(45deg);
}

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

.science-item.active .science-content {
    max-height: 500px;
}

.science-content p {
    padding: 0 24px 24px;
    line-height: 1.8;
}

/* Mobile Science */
@media (max-width: 768px) {
    .science-section {
        padding: var(--section-padding-mobile);
    }
}

/* === FORMULATED SECTION === */
.formulated-section {
    padding: var(--section-padding);
    background: var(--bg-white);
}

.formulated-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
}

.formulated-card {
    background: white;
    padding: 40px 30px;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    text-align: center;
    position: relative;
    transition: all var(--transition-base);
}

.formulated-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.formulated-number {
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    font-family: var(--font-heading);
}

.formulated-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

.formulated-card h3 {
    color: var(--primary-blue);
    margin-bottom: 1rem;
}

/* Mobile Formulated */
@media (max-width: 768px) {
    .formulated-section {
        padding: var(--section-padding-mobile);
    }
    
    .formulated-grid {
        grid-template-columns: 1fr;
    }
}

@media (min-width: 576px) and (max-width: 991px) {
    .formulated-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* === GUARANTEE SECTION === */
.guarantee-section {
    padding: var(--section-padding);
    background: var(--gradient-hero);
}

.guarantee-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
    align-items: center;
}

.guarantee-image img {
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
}

.guarantee-point {
    display: flex;
    gap: 20px;
    margin-bottom: 2rem;
}

.guarantee-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    background: var(--gradient-accent);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
}

.guarantee-point h3 {
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
}

/* Mobile Guarantee */
@media (max-width: 768px) {
    .guarantee-section {
        padding: var(--section-padding-mobile);
    }
    
    .guarantee-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .guarantee-image {
        order: -1;
    }
}

/* === BENEFITS SECTION === */
.benefits-section {
    padding: var(--section-padding);
    background: var(--bg-white);
}

.benefits-list {
    max-width: 900px;
    margin: 0 auto;
}

.benefit-item {
    display: flex;
    gap: 20px;
    padding: 24px;
    background: white;
    border-radius: 12px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    border-left: 4px solid transparent;
}

.benefit-item:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-md);
    border-left-color: var(--primary-blue);
}

.benefit-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
}

.benefit-text h3 {
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
    font-size: 1.125rem;
}

.benefit-text p {
    font-size: 0.9375rem;
}

/* Mobile Benefits */
@media (max-width: 768px) {
    .benefits-section {
        padding: var(--section-padding-mobile);
    }
    
    .benefit-item {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
}

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

.faq-container {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    border-radius: 12px;
    margin-bottom: 16px;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px;
    background: white;
    cursor: pointer;
    min-height: 44px;
    transition: all var(--transition-base);
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--text-dark);
    text-align: left;
}

.faq-question:hover {
    background: var(--bg-light);
}

.faq-icon {
    font-size: 1.5rem;
    color: var(--primary-blue);
    font-weight: 300;
    transition: transform var(--transition-base);
}

.faq-item.active .faq-icon {
    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: 0 24px 24px;
    line-height: 1.8;
}

/* Mobile FAQ */
@media (max-width: 768px) {
    .faq-section {
        padding: var(--section-padding-mobile);
    }
}

/* === FINAL CTA SECTION === */
.final-cta-section {
    padding: var(--section-padding);
    background: var(--gradient-primary);
    color: white;
}

.final-cta-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
    align-items: center;
}

.cta-bottles {
    animation: float 6s ease-in-out infinite;
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.3));
}

.final-cta-text h2 {
    color: white;
    margin-bottom: 2rem;
}

.final-pricing {
    margin-bottom: 2rem;
}

.final-regular,
.final-special {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 12px;
}

.final-label {
    font-size: 1rem;
    opacity: 0.9;
}

.final-old-price {
    font-size: 1.5rem;
    text-decoration: line-through;
    opacity: 0.7;
}

.final-new-price {
    font-size: 2.5rem;
    font-weight: 700;
    font-family: var(--font-heading);
}

.btn-final-cta {
    background: white;
    color: var(--primary-blue);
    font-size: 1.25rem;
    padding: 20px 40px;
    margin-bottom: 1.5rem;
}

.btn-final-cta:hover {
    background: var(--bg-light);
}

.final-guarantee {
    color: white;
    opacity: 0.9;
    font-size: 0.9375rem;
}

/* Mobile Final CTA */
@media (max-width: 768px) {
    .final-cta-section {
        padding: var(--section-padding-mobile);
    }
    
    .final-cta-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .final-cta-image {
        order: -1;
    }
    
    .final-regular,
    .final-special {
        justify-content: center;
    }
    
    .btn-final-cta {
        width: 100%;
    }
}

/* === FOOTER === */
.footer {
    background: var(--text-dark);
    color: white;
    padding: 60px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 3rem;
}

.footer-column h3 {
    color: white;
    margin-bottom: 1.5rem;
}

.footer-column ul {
    list-style: none;
}

.footer-column ul li {
    margin-bottom: 12px;
}

.footer-column ul li a {
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition-base);
}

.footer-column ul li a:hover {
    color: white;
}

.footer-column p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
}

.social-icons {
    display: flex;
    gap: 16px;
    font-size: 1.5rem;
}

.social-icons a {
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
}

.social-icons a:hover {
    background: var(--primary-blue);
    transform: translateY(-3px);
}

.footer-disclaimer {
    padding: 24px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    margin-bottom: 2rem;
}

.footer-disclaimer p {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.8;
}

.footer-copyright {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.5);
}

/* Mobile Footer */
@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .social-icons {
        justify-content: center;
    }
}

/* === SCROLL TO TOP BUTTON === */
.scroll-top-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 56px;
    height: 56px;
    background: var(--gradient-primary);
    color: white;
    border-radius: 50%;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 999;
}

.scroll-top-btn.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top-btn:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

/* === PURCHASE NOTIFICATION === */
.purchase-notification {
    position: fixed;
    bottom: 30px;
    left: 30px;
    background: white;
    padding: 16px 24px;
    border-radius: 12px;
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: 12px;
    opacity: 0;
    transform: translateY(100px);
    transition: all var(--transition-slow);
    z-index: 998;
    max-width: 350px;
}

.purchase-notification.show {
    opacity: 1;
    transform: translateY(0);
}

.notification-icon {
    font-size: 1.5rem;
}

.notification-text {
    font-size: 0.875rem;
    line-height: 1.5;
}

.notification-text strong {
    color: var(--primary-blue);
}

/* Mobile Purchase Notification */
@media (max-width: 768px) {
    .purchase-notification {
        left: 20px;
        right: 20px;
        max-width: calc(100% - 40px);
        bottom: 20px;
    }
}

/* === ANIMATIONS === */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Scroll Animations */
.fade-in-section {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

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

/* === UTILITY CLASSES === */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

/* === REDUCED MOTION === */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* === PRINT STYLES === */
@media print {
    .nav-container,
    .hamburger,
    .scroll-top-btn,
    .purchase-notification {
        display: none;
    }
}