/* ===================================
   POTENTSTREAM - MODERN GRADIENT DESIGN
   Mobile-First Responsive CSS
   =================================== */

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

:root {
    /* Color Palette - Modern Gradient */
    --primary-gradient: linear-gradient(135deg, #4F46E5 0%, #06B6D4 100%);
    --primary-dark: #3730A3;
    --primary-light: #818CF8;
    --secondary: #06B6D4;
    --accent: #F59E0B;
    --success: #10B981;
    --danger: #EF4444;

    /* Neutral Colors */
    --white: #FFFFFF;
    --black: #000000;
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;

    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

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

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-xl: 2rem;
    --radius-full: 9999px;

    /* 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);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;

    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

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

body {
    font-family: var(--font-primary);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--gray-700);
    background-color: var(--white);
    overflow-x: hidden;
}

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

/* === TYPOGRAPHY === */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--gray-900);
    margin-bottom: var(--spacing-md);
}

h1 { font-size: 2rem; } /* 32px */
h2 { font-size: 1.75rem; } /* 28px */
h3 { font-size: 1.5rem; } /* 24px */
h4 { font-size: 1.25rem; } /* 20px */
h5 { font-size: 1.125rem; } /* 18px */
h6 { font-size: 1rem; } /* 16px */

p {
    margin-bottom: var(--spacing-md);
    color: var(--gray-600);
}

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

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

/* === CONTAINER === */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.25rem;
}

/* === SECTION STYLES === */
section {
    padding: 3rem 0;
}

.section-title {
    font-size: 2rem;
    text-align: center;
    margin-bottom: var(--spacing-md);
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    text-align: center;
    font-size: 1.125rem;
    color: var(--gray-600);
    margin-bottom: var(--spacing-lg);
}

/* === BUTTONS === */
.cta-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    min-height: 48px;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--white);
    background: var(--primary-gradient);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: var(--transition-base);
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.cta-button:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

.cta-button:active {
    transform: translateY(0) scale(0.98);
}

/* === NAVIGATION === */
#main-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--white);
    box-shadow: var(--shadow-md);
    z-index: var(--z-sticky);
    transition: var(--transition-base);
}

.navbar {
    padding: 0.75rem 0;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.25rem;
}

.nav-brand a {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 0.25rem;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: var(--z-dropdown);
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--gray-700);
    border-radius: 2px;
    transition: var(--transition-base);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    font-weight: 500;
    color: var(--gray-700);
    transition: var(--transition-base);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-gradient);
    transition: var(--transition-base);
}

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

.nav-link:hover::after {
    width: 100%;
}

.nav-cta {
    padding: 0.5rem 1.5rem;
    background: var(--primary-gradient);
    color: var(--white);
    border-radius: var(--radius-full);
    font-weight: 600;
    transition: var(--transition-base);
    min-height: 44px;
    display: flex;
    align-items: center;
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

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

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

    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .nav-menu {
        position: fixed;
        top: 60px;
        right: -100%;
        flex-direction: column;
        background: var(--white);
        width: 100%;
        max-width: 300px;
        height: calc(100vh - 60px);
        padding: 2rem;
        box-shadow: var(--shadow-xl);
        transition: var(--transition-base);
        align-items: flex-start;
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-link {
        width: 100%;
        padding: 0.75rem 0;
        border-bottom: 1px solid var(--gray-200);
    }

    .nav-cta {
        width: 100%;
        justify-content: center;
        margin-top: 1rem;
    }
}

/* === HERO SECTION === */
.hero-section {
    padding-top: 6rem;
    padding-bottom: 4rem;
    background: linear-gradient(180deg, var(--gray-50) 0%, var(--white) 100%);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100%;
    background: radial-gradient(circle at 30% 50%, rgba(79, 70, 229, 0.1), transparent 60%),
                radial-gradient(circle at 70% 80%, rgba(6, 182, 212, 0.1), transparent 60%);
    pointer-events: none;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-image {
    position: relative;
}

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

@keyframes heroFloat {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    25% { transform: translateY(-20px) rotate(2deg); }
    50% { transform: translateY(-10px) rotate(-2deg); }
    75% { transform: translateY(-20px) rotate(1deg); }
}

.hero-product-img {
    width: 100%;
    max-width: 200px;
    margin: 0 auto;
    filter: drop-shadow(0 25px 50px rgba(79, 70, 229, 0.3));
    animation: fadeInScale 1s ease-out;
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.floating-badge {
    position: absolute;
    top: 10%;
    right: -10%;
    background: var(--primary-gradient);
    color: var(--white);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.875rem;
    box-shadow: var(--shadow-xl);
    animation: badgePulse 2s ease-in-out infinite;
}

@keyframes badgePulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

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

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

.hero-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--gray-600);
    margin-bottom: var(--spacing-md);
}

.hero-cta {
    display: inline-flex;
    margin-top: var(--spacing-md);
    font-size: 1.25rem;
    padding: 1.25rem 2.5rem;
}

.trust-indicators {
    display: flex;
    gap: 2rem;
    margin-top: var(--spacing-xl);
    flex-wrap: wrap;
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--gray-700);
    font-size: 0.875rem;
    font-weight: 500;
}

.trust-item svg {
    color: var(--accent);
}

/* Mobile Hero */
@media (max-width: 768px) {
    .hero-section {
        padding-top: 5rem;
        padding-bottom: 3rem;
    }

    .hero-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .hero-cta {
        width: 100%;
        justify-content: center;
        font-size: 1.125rem;
    }

    .trust-indicators {
        flex-direction: column;
        gap: 1rem;
    }

    .floating-badge {
        top: 5%;
        right: 5%;
        font-size: 0.75rem;
        padding: 0.5rem 1rem;
    }
}

/* === WHY CHOOSE SECTION === */
.why-choose-section {
    background: var(--gray-50);
}

.badges-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: var(--spacing-xl);
}

.badge-card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    opacity: 0;
    transform: translateY(30px);
}

.badge-card.animate {
    animation: slideUp 0.6s ease-out forwards;
}

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

.badge-card:hover {
    transform: translateY(-10px) scale(1.05) rotate(2deg);
    box-shadow: var(--shadow-xl);
}

.badge-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
}

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

.badge-title {
    font-size: 1.25rem;
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
}

.badge-description {
    font-size: 0.9375rem;
    color: var(--gray-600);
    line-height: 1.6;
}

/* Mobile Badges */
@media (max-width: 768px) {
    .badges-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .badge-card {
        padding: 1.5rem;
    }
}

@media (min-width: 576px) and (max-width: 768px) {
    .badges-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* === WHAT IS SECTION === */
.what-is-section {
    background: var(--white);
}

.what-is-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    margin-top: var(--spacing-xl);
}

.what-is-content {
    animation: fadeIn 1s ease-out;
}

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

.what-is-text {
    font-size: 1.0625rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.what-is-image {
    position: relative;
}

.support-img {
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
}

/* Mobile What Is */
@media (max-width: 768px) {
    .what-is-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .what-is-image {
        order: -1;
    }
}

/* === HOW IT WORKS === */
.how-it-works-section {
    background: linear-gradient(180deg, var(--gray-50) 0%, var(--white) 100%);
}

.accordion {
    max-width: 900px;
    margin: var(--spacing-xl) auto 0;
}

.accordion-item {
    background: var(--white);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: var(--transition-base);
}

.accordion-item:hover {
    box-shadow: var(--shadow-md);
}

.accordion-header {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 1.5rem;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-900);
    text-align: left;
    min-height: 44px;
    transition: var(--transition-base);
}

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

.accordion-icon {
    flex-shrink: 0;
    transition: var(--transition-base);
    color: var(--primary-dark);
}

.accordion-item.active .accordion-icon {
    transform: rotate(180deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
}

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

.accordion-content p {
    padding: 0 1.5rem 1.5rem;
    color: var(--gray-600);
    line-height: 1.7;
}

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

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: var(--spacing-xl);
}

.review-card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    opacity: 0;
    transform: translateX(-50px);
}

.review-card.animate {
    animation: slideInRight 0.6s ease-out forwards;
}

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

.review-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.review-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: var(--spacing-md);
}

.review-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--primary-light);
}

.review-info {
    flex: 1;
}

.review-name {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 0.25rem;
}

.review-location {
    font-size: 0.875rem;
    color: var(--gray-500);
}

.review-rating {
    display: flex;
    gap: 0.25rem;
    margin-bottom: var(--spacing-md);
    color: var(--accent);
}

.review-text {
    font-size: 0.9375rem;
    color: var(--gray-600);
    line-height: 1.7;
    font-style: italic;
}

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

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

/* === PRICING SECTION === */
.pricing-section {
    background: linear-gradient(180deg, var(--gray-50) 0%, var(--white) 100%);
    position: relative;
}

.countdown-timer {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin: var(--spacing-lg) auto var(--spacing-xl);
    padding: 1.5rem 3rem;
    background: var(--danger);
    color: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    max-width: fit-content;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7); }
    50% { box-shadow: 0 0 0 20px rgba(239, 68, 68, 0); }
}

.timer-box {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.timer-number {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1;
}

.timer-label {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 0.25rem;
}

.timer-separator {
    font-size: 3rem;
    font-weight: 700;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: var(--spacing-xl);
}

.pricing-card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    text-align: center;
    transition: var(--transition-base);
    position: relative;
    border: 2px solid transparent;
}

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-2xl);
}

.pricing-featured {
    border-color: var(--primary-dark);
    background: linear-gradient(180deg, rgba(79, 70, 229, 0.05) 0%, var(--white) 100%);
    transform: scale(1.05);
}

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

.pricing-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--danger);
    color: var(--white);
    padding: 0.5rem 1.5rem;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    box-shadow: var(--shadow-lg);
}

.pricing-label {
    display: inline-block;
    background: var(--primary-gradient);
    color: var(--white);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: var(--spacing-md);
}

.pricing-title {
    font-size: 1.5rem;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

.pricing-supply {
    font-size: 0.9375rem;
    color: var(--gray-600);
    margin-bottom: var(--spacing-lg);
}

.pricing-image {
    margin: var(--spacing-lg) 0;
}

.pricing-image img {
    width: 100%;
    max-width: 200px;
    margin: 0 auto;
}

.pricing-price {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.price-per {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-dark);
    line-height: 1;
}

.price-label {
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-top: 0.25rem;
}

.pricing-total {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: var(--spacing-lg);
}

.price-old {
    font-size: 1.5rem;
    color: var(--gray-400);
    text-decoration: line-through;
}

.price-new {
    font-size: 2rem;
    font-weight: 700;
    color: var(--success);
}

.pricing-bonuses {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: var(--spacing-md);
}

.bonus-badge {
    display: inline-block;
    background: var(--success);
    color: var(--white);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
}

.pricing-button {
    width: 100%;
    padding: 1rem 2rem;
    min-height: 50px;
    background: var(--primary-gradient);
    color: var(--white);
    font-size: 1.125rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: var(--transition-base);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.payment-logos {
    margin-top: var(--spacing-md);
}

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

.rating-display {
    text-align: center;
    margin-top: var(--spacing-xl);
}

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

/* Mobile Pricing */
@media (max-width: 575px) {
    .pricing-grid {
        grid-template-columns: 1fr;
    }

    .pricing-featured {
        transform: scale(1);
    }

    .pricing-featured:hover {
        transform: translateY(-10px);
    }

    .countdown-timer {
        padding: 1rem 2rem;
        flex-wrap: wrap;
    }

    .timer-number {
        font-size: 2rem;
    }

    .timer-separator {
        font-size: 2rem;
    }
}

@media (min-width: 576px) and (max-width: 768px) {
    .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .pricing-card:last-child {
        grid-column: 1 / -1;
        max-width: 400px;
        margin: 0 auto;
    }
}

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

.ingredients-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: var(--spacing-xl);
}

.ingredient-card {
    background: var(--gray-50);
    padding: 2rem;
    border-radius: var(--radius-lg);
    border-left: 4px solid transparent;
    transition: var(--transition-base);
}

.ingredient-card:hover {
    border-left-color: var(--primary-dark);
    background: var(--white);
    box-shadow: var(--shadow-md);
    transform: translateX(5px);
}

.ingredient-name {
    font-size: 1.25rem;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-sm);
}

.ingredient-description {
    font-size: 0.9375rem;
    color: var(--gray-600);
    line-height: 1.7;
}

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

/* === SCIENTIFIC EVIDENCE === */
.scientific-section {
    background: linear-gradient(180deg, var(--gray-50) 0%, var(--white) 100%);
}

.scientific-content {
    max-width: 900px;
    margin: var(--spacing-xl) auto 0;
}

.evidence-group {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

.evidence-group:hover {
    box-shadow: var(--shadow-md);
}

.evidence-title {
    font-size: 1.25rem;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-md);
}

.evidence-text {
    font-size: 1rem;
    color: var(--gray-600);
    line-height: 1.8;
}

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

.guarantee-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    margin-top: var(--spacing-xl);
}

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

.guarantee-img {
    max-width: 300px;
    margin: 0 auto;
    animation: rotate360 10s linear infinite;
}

@keyframes rotate360 {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.guarantee-points {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.guarantee-point {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

.point-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-gradient);
    color: var(--white);
    border-radius: 50%;
}

.point-title {
    font-size: 1.25rem;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

.point-text {
    font-size: 0.9375rem;
    color: var(--gray-600);
    line-height: 1.7;
}

/* Mobile Guarantee */
@media (max-width: 768px) {
    .guarantee-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .guarantee-image {
        order: -1;
    }
}

/* === BENEFITS SECTION === */
.benefits-section {
    background: linear-gradient(180deg, var(--gray-50) 0%, var(--white) 100%);
}

.benefits-list {
    max-width: 900px;
    margin: var(--spacing-xl) auto 0;
    display: grid;
    gap: 1.5rem;
}

.benefit-item {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
    background: var(--white);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

.benefit-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(10px);
}

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

.benefit-title {
    font-size: 1.125rem;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

.benefit-text {
    font-size: 0.9375rem;
    color: var(--gray-600);
    line-height: 1.7;
}

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

.faq-accordion {
    max-width: 900px;
    margin: var(--spacing-xl) auto 0;
}

.faq-item {
    background: var(--gray-50);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    overflow: hidden;
    transition: var(--transition-base);
}

.faq-item:hover {
    box-shadow: var(--shadow-md);
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 1.5rem;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-900);
    text-align: left;
    min-height: 44px;
    transition: var(--transition-base);
}

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

.faq-icon {
    flex-shrink: 0;
    transition: var(--transition-base);
    color: var(--primary-dark);
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
}

.faq-item.active .faq-answer {
    max-height: 1000px;
}

.faq-answer p {
    padding: 0 1.5rem 1.5rem;
    color: var(--gray-600);
    line-height: 1.8;
}

/* === FINAL CTA SECTION === */
.final-cta-section {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--secondary) 100%);
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.final-cta-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    animation: float 20s ease-in-out infinite;
}

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

.final-cta-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.final-cta-image {
    animation: finalProductFloat 8s ease-in-out infinite;
}

@keyframes finalProductFloat {
    0%, 100% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-30px) scale(1.05); }
}

.final-product-img {
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
    filter: drop-shadow(0 25px 50px rgba(0, 0, 0, 0.3));
}

.final-cta-title {
    font-size: 2.25rem;
    color: var(--white);
    margin-bottom: var(--spacing-lg);
}

.final-cta-pricing {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: var(--spacing-lg);
}

.final-price-old {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: line-through;
}

.final-price-new {
    font-size: 3rem;
    font-weight: 700;
    color: var(--white);
    line-height: 1;
}

.final-price-save {
    font-size: 1.125rem;
    color: var(--accent);
    font-weight: 600;
}

.final-cta-button {
    background: var(--white);
    color: var(--primary-dark);
    font-size: 1.25rem;
    padding: 1.25rem 2.5rem;
    margin-bottom: var(--spacing-md);
}

.final-cta-button:hover {
    background: var(--gray-100);
    transform: scale(1.05);
}

.final-cta-guarantee {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.9);
}

/* Mobile Final CTA */
@media (max-width: 768px) {
    .final-cta-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }

    .final-cta-title {
        font-size: 1.75rem;
    }

    .final-price-new {
        font-size: 2.5rem;
    }

    .final-cta-button {
        width: 100%;
    }

    .final-cta-guarantee {
        justify-content: center;
    }
}

/* === FOOTER === */
.footer {
    background: var(--gray-900);
    color: var(--gray-300);
    padding: 3rem 0 1.5rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.25rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
}

.footer-links a {
    color: var(--gray-300);
    transition: var(--transition-base);
}

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

.footer-separator {
    color: var(--gray-600);
}

.footer-disclaimer {
    background: rgba(255, 255, 255, 0.05);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
}

.footer-disclaimer p {
    font-size: 0.875rem;
    line-height: 1.7;
    color: var(--gray-400);
    margin-bottom: var(--spacing-sm);
}

.footer-note {
    font-size: 0.8125rem;
    font-style: italic;
}

.footer-social {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: var(--spacing-lg);
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--gray-300);
    transition: var(--transition-base);
}

.social-link:hover {
    background: var(--primary-gradient);
    color: var(--white);
    transform: translateY(-3px);
}

.footer-copyright {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-copyright p {
    font-size: 0.875rem;
    color: var(--gray-500);
}

/* Mobile Footer */
@media (max-width: 768px) {
    .footer-links {
        flex-direction: column;
        gap: 0.75rem;
    }

    .footer-separator {
        display: none;
    }
}

/* === SCROLL TO TOP === */
.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 56px;
    height: 56px;
    background: var(--primary-gradient);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow-xl);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
    z-index: var(--z-fixed);
}

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

.scroll-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-2xl);
}

/* === PURCHASE POPUP === */
.purchase-popup {
    position: fixed;
    bottom: 30px;
    left: 30px;
    background: var(--white);
    padding: 1rem 1.5rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: 1rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition-base);
    z-index: var(--z-fixed);
    max-width: 350px;
}

.purchase-popup.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.popup-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--success);
    color: var(--white);
    border-radius: 50%;
    flex-shrink: 0;
}

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

.popup-time {
    font-size: 0.75rem;
    color: var(--gray-500);
    margin-top: 0.25rem;
}

/* Mobile Purchase Popup */
@media (max-width: 768px) {
    .purchase-popup {
        left: 50%;
        transform: translateX(-50%) translateY(20px);
        bottom: 20px;
        max-width: calc(100% - 40px);
    }

    .purchase-popup.show {
        transform: translateX(-50%) translateY(0);
    }
}

/* === CTA POPUP === */
.popup-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
    z-index: var(--z-modal-backdrop);
}

.popup-overlay.active {
    opacity: 1;
    visibility: visible;
}

.cta-popup {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-2xl);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
    z-index: var(--z-modal);
}

.cta-popup.active {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1);
}

.popup-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-100);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-base);
    z-index: 1;
}

.popup-close:hover {
    background: var(--gray-200);
    transform: rotate(90deg);
}

.popup-body {
    padding: 2rem;
}

.popup-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.popup-header h3 {
    font-size: 1.75rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.popup-header p {
    font-size: 1.125rem;
    color: var(--gray-600);
}

.popup-offer {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.popup-product img {
    max-width: 150px;
}

.popup-details {
    flex: 1;
}

.popup-pricing {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: var(--spacing-md);
}

.popup-old-price {
    font-size: 1.25rem;
    color: var(--gray-400);
    text-decoration: line-through;
}

.popup-new-price {
    font-size: 2rem;
    font-weight: 700;
    color: var(--success);
}

.popup-per {
    font-size: 0.875rem;
    color: var(--gray-500);
}

.popup-benefits {
    list-style: none;
    margin-bottom: var(--spacing-md);
}

.popup-benefits li {
    padding: 0.5rem 0;
    color: var(--gray-700);
}

.popup-cta {
    display: block;
    width: 100%;
    padding: 1rem 2rem;
    background: var(--primary-gradient);
    color: var(--white);
    text-align: center;
    font-weight: 600;
    font-size: 1.125rem;
    border-radius: var(--radius-full);
    transition: var(--transition-base);
}

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

/* Mobile CTA Popup */
@media (max-width: 768px) {
    .cta-popup {
        width: 95%;
        max-width: none;
    }

    .popup-body {
        padding: 1.5rem;
    }

    .popup-offer {
        flex-direction: column;
        gap: 1.5rem;
    }

    .popup-product img {
        max-width: 120px;
    }

    .popup-header h3 {
        font-size: 1.5rem;
    }
}

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

/* === RESPONSIVE TYPOGRAPHY === */
@media (min-width: 768px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.75rem; }

    .section-title { font-size: 2.5rem; }
}

@media (min-width: 1024px) {
    h1 { font-size: 3rem; }
    h2 { font-size: 2.25rem; }
    h3 { font-size: 1.875rem; }

    .section-title { font-size: 3rem; }
    .hero-title { font-size: 3rem; }
}

/* === PERFORMANCE OPTIMIZATIONS === */
.hero-product-img,
.support-img,
.final-product-img {
    will-change: transform;
}

.badge-card,
.review-card,
.pricing-card {
    will-change: transform;
}

/* === PRINT STYLES === */
@media print {
    .navbar,
    .scroll-to-top,
    .purchase-popup,
    .cta-popup,
    .popup-overlay {
        display: none !important;
    }

    section {
        page-break-inside: avoid;
    }
}