/* ============================================
   NeuroDyne Landing Page - Modern Gradient Design
   Mobile-First Responsive CSS
   ============================================ */

/* ============================================
   CSS Reset & Base Styles
   ============================================ */
* {
    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: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f8f9fa;
    overflow-x: hidden;
}

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

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

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

input, select, textarea {
    font-size: 16px;
}

/* ============================================
   Container & Layout
   ============================================ */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

@media (min-width: 768px) {
    .container {
        padding: 0 40px;
    }
}

@media (min-width: 1024px) {
    .container {
        padding: 0 60px;
    }
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 1rem;
}

h1 {
    font-size: 28px;
}

h2 {
    font-size: 24px;
}

h3 {
    font-size: 20px;
}

p {
    margin-bottom: 1rem;
    line-height: 1.7;
}

@media (min-width: 768px) {
    h1 {
        font-size: 36px;
    }

    h2 {
        font-size: 32px;
    }

    h3 {
        font-size: 24px;
    }
}

@media (min-width: 1024px) {
    h1 {
        font-size: 44px;
    }

    h2 {
        font-size: 36px;
    }

    h3 {
        font-size: 26px;
    }
}

/* ============================================
   Buttons
   ============================================ */
.btn-primary,
.btn-nav,
.btn-hero,
.btn-pricing,
.btn-final-cta,
.btn-popup {
    display: inline-block;
    padding: 16px 32px;
    min-height: 48px;
    background: linear-gradient(135deg, #4F46E5 0%, #06B6D4 100%);
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    border-radius: 50px;
    text-align: center;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(79, 70, 229, 0.3);
}

.btn-primary:hover,
.btn-nav:hover,
.btn-hero:hover,
.btn-pricing:hover,
.btn-final-cta:hover,
.btn-popup:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 6px 20px rgba(79, 70, 229, 0.4);
}

.btn-primary:active,
.btn-nav:active,
.btn-hero:active,
.btn-pricing:active,
.btn-final-cta:active,
.btn-popup:active {
    transform: translateY(0) scale(0.98);
}

.btn-hero {
    padding: 18px 40px;
    font-size: 18px;
    width: 100%;
    margin-top: 1.5rem;
}

.btn-arrow {
    margin-left: 8px;
    transition: transform 0.3s ease;
}

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

@media (min-width: 768px) {
    .btn-hero {
        width: auto;
        min-width: 300px;
    }
}

/* ============================================
   Section Titles
   ============================================ */
.section-title {
    text-align: center;
    font-size: 28px;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #4F46E5, #06B6D4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    text-align: center;
    font-size: 18px;
    color: #666;
    margin-bottom: 2rem;
}

@media (min-width: 768px) {
    .section-title {
        font-size: 36px;
        margin-bottom: 1.5rem;
    }

    .section-subtitle {
        font-size: 20px;
    }
}

/* ============================================
   SECTION 1: NAVIGATION
   ============================================ */
#main-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

#main-header.scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.navbar {
    padding: 15px 0;
}

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

.logo a {
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(135deg, #4F46E5, #06B6D4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    z-index: 1001;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: linear-gradient(135deg, #4F46E5, #06B6D4);
    border-radius: 3px;
    transition: all 0.3s ease;
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

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

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

.nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: linear-gradient(180deg, #4F46E5 0%, #06B6D4 100%);
    padding: 80px 30px 30px;
    list-style: none;
    transition: right 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    box-shadow: -5px 0 20px rgba(0, 0, 0, 0.2);
}

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

.nav-menu li {
    margin-bottom: 25px;
}

.nav-link {
    color: #fff;
    font-size: 18px;
    font-weight: 500;
    padding: 10px;
    display: block;
    transition: all 0.3s ease;
    border-radius: 8px;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(5px);
}

.nav-menu .btn-nav {
    background: #fff;
    color: #4F46E5;
    display: block;
    text-align: center;
    padding: 14px 24px;
    margin-top: 20px;
}

.nav-menu .btn-nav:hover {
    background: #f0f0f0;
}

@media (min-width: 768px) {
    .nav-toggle {
        display: none;
    }

    .nav-menu {
        position: static;
        width: auto;
        height: auto;
        background: transparent;
        padding: 0;
        display: flex;
        align-items: center;
        gap: 30px;
        box-shadow: none;
    }

    .nav-menu li {
        margin-bottom: 0;
    }

    .nav-link {
        color: #333;
        font-size: 16px;
        padding: 8px 12px;
    }

    .nav-link:hover {
        background: rgba(79, 70, 229, 0.1);
        transform: none;
    }

    .nav-menu .btn-nav {
        background: linear-gradient(135deg, #4F46E5, #06B6D4);
        color: #fff;
        margin-top: 0;
        padding: 12px 28px;
    }
}

/* ============================================
   SECTION 2: HERO SECTION
   ============================================ */
.hero-section {
    padding: 60px 0;
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.05) 0%, rgba(6, 182, 212, 0.05) 100%);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(79, 70, 229, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) scale(1);
    }
    50% {
        transform: translateY(-20px) scale(1.05);
    }
}

.hero-container {
    display: flex;
    flex-direction: column;
    gap: 40px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-image {
    width: 100%;
    max-width: 400px;
}

.product-showcase {
    position: relative;
    animation: productEntrance 1s ease-out;
}

@keyframes productEntrance {
    0% {
        opacity: 0;
        transform: scale(0.8) rotateY(-30deg);
    }
    100% {
        opacity: 1;
        transform: scale(1) rotateY(0);
    }
}

.hero-product-img {
    width: 50%;
    filter: drop-shadow(0 10px 30px rgba(79, 70, 229, 0.3));
    animation: productFloat 3s ease-in-out infinite;
}

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

.floating-badge {
    position: absolute;
    top: 10%;
    right: -10px;
    background: linear-gradient(135deg, #10B981, #059669);
    color: #fff;
    padding: 10px 20px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4);
    animation: badgePulse 2s ease-in-out infinite;
}

@keyframes badgePulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 6px 20px rgba(16, 185, 129, 0.6);
    }
}

.hero-content {
    flex: 1;
    animation: contentSlideIn 1s ease-out 0.3s both;
}

@keyframes contentSlideIn {
    0% {
        opacity: 0;
        transform: translateX(-30px);
    }
    100% {
        opacity: 1;
        transform: translateX(0);
    }
}

.hero-content h1 {
    margin-bottom: 1.5rem;
    line-height: 1.3;
}

.hero-content p {
    font-size: 16px;
    color: #555;
    margin-bottom: 1rem;
}

.trust-indicators {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 2rem;
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: #666;
}

.trust-icon {
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, #10B981, #059669);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
    flex-shrink: 0;
}

@media (min-width: 768px) {
    .hero-section {
        padding: 80px 0;
    }

    .hero-container {
        flex-direction: row;
        gap: 60px;
    }

    .hero-image {
        max-width: 450px;
    }

    .trust-indicators {
        flex-direction: row;
        gap: 20px;
    }
}

@media (min-width: 1024px) {
    .hero-section {
        padding: 100px 0;
    }

    .hero-image {
        max-width: 500px;
    }
}

/* ============================================
   SECTION 3: WHY CHOOSE US
   ============================================ */
.why-choose-section {
    padding: 60px 0;
    background: #fff;
}

.badges-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
    margin-top: 3rem;
}

.badge-card {
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.05) 0%, rgba(6, 182, 212, 0.05) 100%);
    padding: 30px;
    border-radius: 20px;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    border: 2px solid transparent;
    opacity: 0;
    transform: translateY(50px);
}

.badge-card.animate {
    opacity: 1;
    transform: translateY(0);
}

.badge-card:hover {
    transform: translateY(-10px) scale(1.03) rotate(1deg);
    box-shadow: 0 15px 40px rgba(79, 70, 229, 0.2);
    border-color: rgba(79, 70, 229, 0.2);
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.1) 0%, rgba(6, 182, 212, 0.1) 100%);
}

.badge-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.badge-card:hover .badge-icon {
    transform: scale(1.1) rotate(5deg);
}

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

.badge-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    background: linear-gradient(135deg, #4F46E5, #06B6D4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.badge-card p {
    font-size: 15px;
    color: #666;
    line-height: 1.7;
    margin-bottom: 0;
}

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

@media (min-width: 1024px) {
    .badges-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 30px;
    }

    .why-choose-section {
        padding: 80px 0;
    }
}

/* Stagger animation */
.badge-card:nth-child(1) {
    transition-delay: 0.1s;
}

.badge-card:nth-child(2) {
    transition-delay: 0.2s;
}

.badge-card:nth-child(3) {
    transition-delay: 0.3s;
}

.badge-card:nth-child(4) {
    transition-delay: 0.4s;
}

/* ============================================
   SECTION 4: WHAT IS NEURODYNE
   ============================================ */
.what-is-section {
    padding: 60px 0;
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.02) 0%, rgba(6, 182, 212, 0.02) 100%);
}

.what-is-content {
    display: flex;
    flex-direction: column;
    gap: 40px;
    align-items: center;
    margin-top: 2rem;
}

.what-is-text {
    flex: 1;
}

.what-is-text p {
    font-size: 16px;
    color: #555;
    line-height: 1.8;
}

.what-is-image {
    flex: 1;
    max-width: 500px;
    width: 100%;
}

.what-is-image img {
    width: 100%;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

@media (min-width: 768px) {
    .what-is-section {
        padding: 80px 0;
    }

    .what-is-content {
        flex-direction: row;
        gap: 60px;
    }
}

/* ============================================
   SECTION 5: HOW IT WORKS
   ============================================ */
.how-it-works-section {
    padding: 60px 0;
    background: #fff;
}

.accordion {
    margin-top: 2rem;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.accordion-item {
    background: #fff;
    border: 2px solid #e5e7eb;
    border-radius: 15px;
    margin-bottom: 15px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.accordion-item:hover {
    border-color: rgba(79, 70, 229, 0.3);
    box-shadow: 0 5px 15px rgba(79, 70, 229, 0.1);
}

.accordion-header {
    width: 100%;
    padding: 20px 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.05) 0%, rgba(6, 182, 212, 0.05) 100%);
    transition: all 0.3s ease;
    min-height: 48px;
}

.accordion-header:hover {
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.1) 0%, rgba(6, 182, 212, 0.1) 100%);
}

.accordion-title {
    font-size: 18px;
    font-weight: 600;
    color: #1a1a1a;
    text-align: left;
}

.accordion-icon {
    font-size: 24px;
    color: #4F46E5;
    transition: transform 0.3s ease;
    font-weight: 300;
}

.accordion-header[aria-expanded="true"] .accordion-icon {
    transform: rotate(45deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.accordion-content p {
    padding: 20px 25px;
    color: #555;
    line-height: 1.8;
    margin-bottom: 0;
}

@media (min-width: 768px) {
    .how-it-works-section {
        padding: 80px 0;
    }

    .accordion-title {
        font-size: 20px;
    }
}

/* ============================================
   SECTION 6: CUSTOMER REVIEWS
   ============================================ */
.reviews-section {
    padding: 60px 0;
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.03) 0%, rgba(6, 182, 212, 0.03) 100%);
}

.reviews-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
    margin-top: 3rem;
}

.review-card {
    background: #fff;
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.4s ease;
    opacity: 0;
    transform: translateY(30px) scale(0.95);
}

.review-card.animate {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.review-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 15px 40px rgba(79, 70, 229, 0.15);
}

.review-header {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
    align-items: flex-start;
}

.reviewer-photo {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid transparent;
    background: linear-gradient(white, white) padding-box,
                linear-gradient(135deg, #4F46E5, #06B6D4) border-box;
    flex-shrink: 0;
}

.reviewer-info h3 {
    font-size: 18px;
    margin-bottom: 5px;
    color: #1a1a1a;
}

.reviewer-location {
    font-size: 14px;
    color: #888;
    margin-bottom: 8px;
}

.rating {
    display: flex;
    gap: 3px;
}

.rating span {
    color: #FFA500;
    font-size: 18px;
}

.review-content p {
    font-size: 15px;
    color: #555;
    line-height: 1.7;
    margin-bottom: 0;
    font-style: italic;
}

@media (min-width: 768px) {
    .reviews-section {
        padding: 80px 0;
    }

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

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

/* Review animation stagger */
.review-card:nth-child(1) {
    transition-delay: 0.1s;
}

.review-card:nth-child(2) {
    transition-delay: 0.2s;
}

.review-card:nth-child(3) {
    transition-delay: 0.3s;
}

/* ============================================
   SECTION 7 & 12: PRICING SECTIONS
   ============================================ */
.pricing-section {
    padding: 60px 0;
    background: #fff;
    position: relative;
    overflow: hidden;
}

.pricing-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 200px;
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.05) 0%, rgba(6, 182, 212, 0.05) 100%);
    z-index: 0;
}

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

/* Countdown Timer */
.countdown-timer {
    max-width: 500px;
    margin: 2rem auto 3rem;
    text-align: center;
}

.countdown-timer .timer-label {
    font-size: 18px;
    font-weight: 600;
    color: #EF4444;
    margin-bottom: 15px;
}

.timer-display {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
}

.timer-box {
    background: linear-gradient(135deg, #EF4444, #DC2626);
    padding: 20px 30px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(239, 68, 68, 0.3);
}

.timer-value {
    display: block;
    font-size: 40px;
    font-weight: 700;
    color: #fff;
    line-height: 1;
}

.timer-label-small {
    display: block;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.9);
    margin-top: 5px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.timer-separator {
    font-size: 36px;
    font-weight: 700;
    color: #EF4444;
}

@media (min-width: 768px) {
    .timer-value {
        font-size: 48px;
    }
}

/* Pricing Grid */
.pricing-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
    margin-top: 3rem;
}

.pricing-card {
    background: #fff;
    border: 2px solid #e5e7eb;
    border-radius: 20px;
    padding: 30px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
}

.pricing-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border-color: rgba(79, 70, 229, 0.3);
}

.pricing-card-featured {
    border-color: #4F46E5;
    border-width: 3px;
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.03) 0%, rgba(6, 182, 212, 0.03) 100%);
    transform: scale(1);
}

.pricing-card-featured:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 15px 40px rgba(79, 70, 229, 0.2);
}

.pricing-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, #EF4444, #DC2626);
    color: #fff;
    padding: 8px 25px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 700;
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.4);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.pricing-label {
    font-size: 14px;
    font-weight: 600;
    color: #4F46E5;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 10px;
}

.pricing-title {
    font-size: 24px;
    margin-bottom: 5px;
}

.pricing-supply {
    font-size: 14px;
    color: #666;
    margin-bottom: 20px;
}

.pricing-image {
    margin: 20px 0;
}

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

.pricing-price {
    margin: 20px 0;
}

.price-per-bottle {
    display: block;
    font-size: 48px;
    font-weight: 700;
    color: #1a1a1a;
    line-height: 1;
}

.price-label {
    display: block;
    font-size: 14px;
    color: #666;
    margin-top: 5px;
}

.pricing-total {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    margin: 20px 0;
}

.original-price {
    font-size: 24px;
    color: #999;
    text-decoration: line-through;
}

.discount-price {
    font-size: 32px;
    font-weight: 700;
    color: #10B981;
}

.pricing-bonuses {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin: 20px 0;
}

.bonus-badge,
.shipping-badge {
    background: linear-gradient(135deg, #10B981, #059669);
    color: #fff;
    padding: 8px 15px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
}

.shipping-badge {
    background: linear-gradient(135deg, #F59E0B, #D97706);
}

.btn-pricing {
    width: 100%;
    margin: 20px 0;
    font-size: 18px;
}

.payment-logos {
    margin-top: 20px;
}

.payment-logos img {
    max-width: 200px;
    margin: 0 auto;
    opacity: 0.8;
}

.rating-display {
    text-align: center;
    margin-top: 3rem;
}

.rating-display img {
    max-width: 200px;
    margin: 0 auto;
}

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

@media (min-width: 1024px) {
    .pricing-section {
        padding: 80px 0;
    }

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

    .pricing-card-featured {
        transform: scale(1.05);
    }

    .pricing-card-featured:hover {
        transform: translateY(-5px) scale(1.07);
    }
}

/* ============================================
   SECTION 8: INGREDIENTS
   ============================================ */
.ingredients-section {
    padding: 60px 0;
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.02) 0%, rgba(6, 182, 212, 0.02) 100%);
}

.ingredients-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 25px;
    margin-top: 2rem;
}

.ingredient-card {
    background: #fff;
    padding: 25px;
    border-radius: 15px;
    border-left: 4px solid transparent;
    background-image: linear-gradient(#fff, #fff), linear-gradient(135deg, #4F46E5, #06B6D4);
    background-origin: padding-box, border-box;
    background-clip: padding-box, border-box;
    transition: all 0.3s ease;
}

.ingredient-card:hover {
    transform: translateX(5px);
    box-shadow: 0 5px 20px rgba(79, 70, 229, 0.1);
}

.ingredient-card h3 {
    font-size: 18px;
    margin-bottom: 12px;
    background: linear-gradient(135deg, #4F46E5, #06B6D4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.ingredient-card p {
    font-size: 15px;
    color: #555;
    line-height: 1.7;
    margin-bottom: 0;
}

@media (min-width: 768px) {
    .ingredients-section {
        padding: 80px 0;
    }

    .ingredients-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }
}

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

/* ============================================
   SECTION 9: SCIENTIFIC EVIDENCE
   ============================================ */
.scientific-section {
    padding: 60px 0;
    background: #fff;
}

.scientific-content {
    margin-top: 2rem;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.evidence-item {
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.05) 0%, rgba(6, 182, 212, 0.05) 100%);
    padding: 30px;
    border-radius: 15px;
    margin-bottom: 25px;
    border: 2px solid transparent;
    transition: all 0.3s ease;
}

.evidence-item:hover {
    border-color: rgba(79, 70, 229, 0.2);
    box-shadow: 0 5px 20px rgba(79, 70, 229, 0.1);
}

.evidence-item h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #4F46E5;
}

.evidence-item p {
    font-size: 15px;
    color: #555;
    line-height: 1.8;
    margin-bottom: 0;
}

@media (min-width: 768px) {
    .scientific-section {
        padding: 80px 0;
    }
}

/* ============================================
   SECTION 10: MONEY BACK GUARANTEE
   ============================================ */
.guarantee-section {
    padding: 60px 0;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.05) 0%, rgba(5, 150, 105, 0.05) 100%);
}

.guarantee-content {
    display: flex;
    flex-direction: column;
    gap: 40px;
    align-items: center;
    margin-top: 2rem;
}

.guarantee-image {
    max-width: 400px;
    width: 100%;
}

.guarantee-image img {
    width: 100%;
    filter: drop-shadow(0 10px 30px rgba(16, 185, 129, 0.2));
}

.guarantee-text {
    flex: 1;
}

.guarantee-item {
    background: #fff;
    padding: 25px;
    border-radius: 15px;
    margin-bottom: 20px;
    border-left: 4px solid #10B981;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.guarantee-item:hover {
    transform: translateX(5px);
    box-shadow: 0 8px 25px rgba(16, 185, 129, 0.15);
}

.guarantee-item h3 {
    font-size: 20px;
    color: #10B981;
    margin-bottom: 12px;
}

.guarantee-item p {
    font-size: 15px;
    color: #555;
    line-height: 1.7;
    margin-bottom: 0;
}

@media (min-width: 768px) {
    .guarantee-section {
        padding: 80px 0;
    }

    .guarantee-content {
        flex-direction: row;
        gap: 60px;
    }
}

/* ============================================
   SECTION 11: BENEFITS
   ============================================ */
.benefits-section {
    padding: 60px 0;
    background: #fff;
}

.benefits-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    margin-top: 2rem;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.benefit-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.03) 0%, rgba(6, 182, 212, 0.03) 100%);
    padding: 25px;
    border-radius: 15px;
    transition: all 0.3s ease;
}

.benefit-item:hover {
    transform: translateX(5px);
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.08) 0%, rgba(6, 182, 212, 0.08) 100%);
    box-shadow: 0 5px 15px rgba(79, 70, 229, 0.1);
}

.benefit-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #4F46E5, #06B6D4);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.benefit-icon svg {
    width: 24px;
    height: 24px;
    color: #fff;
}

.benefit-content h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.benefit-content p {
    font-size: 15px;
    color: #666;
    margin-bottom: 0;
}

@media (min-width: 768px) {
    .benefits-section {
        padding: 80px 0;
    }

    .benefits-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }
}

/* ============================================
   SECTION 13: FAQ
   ============================================ */
.faq-section {
    padding: 60px 0;
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.02) 0%, rgba(6, 182, 212, 0.02) 100%);
}

.faq-accordion {
    margin-top: 2rem;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.faq-item {
    background: #fff;
    border: 2px solid #e5e7eb;
    border-radius: 15px;
    margin-bottom: 15px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item:hover {
    border-color: rgba(79, 70, 229, 0.3);
    box-shadow: 0 5px 15px rgba(79, 70, 229, 0.1);
}

.faq-header {
    width: 100%;
    padding: 20px 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.05) 0%, rgba(6, 182, 212, 0.05) 100%);
    transition: all 0.3s ease;
    min-height: 48px;
    text-align: left;
}

.faq-header:hover {
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.1) 0%, rgba(6, 182, 212, 0.1) 100%);
}

.faq-question {
    font-size: 16px;
    font-weight: 600;
    color: #1a1a1a;
    flex: 1;
    padding-right: 15px;
}

.faq-icon {
    font-size: 24px;
    color: #4F46E5;
    transition: transform 0.3s ease;
    font-weight: 300;
    flex-shrink: 0;
}

.faq-header[aria-expanded="true"] .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq-answer p {
    padding: 20px 25px;
    color: #555;
    line-height: 1.8;
    margin-bottom: 0;
    font-size: 15px;
}

@media (min-width: 768px) {
    .faq-section {
        padding: 80px 0;
    }

    .faq-question {
        font-size: 18px;
    }
}

/* ============================================
   SECTION 16: FINAL CTA
   ============================================ */
.final-cta-section {
    padding: 60px 0;
    background: linear-gradient(135deg, #4F46E5 0%, #06B6D4 100%);
    color: #fff;
    position: relative;
    overflow: hidden;
}

.final-cta-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 8s ease-in-out infinite;
}

.final-cta-content {
    display: flex;
    flex-direction: column;
    gap: 40px;
    align-items: center;
    text-align: center;
    position: relative;
    z-index: 1;
}

.final-cta-image {
    max-width: 350px;
    animation: finalProductFloat 3s ease-in-out infinite;
}

@keyframes finalProductFloat {
    0%, 100% {
        transform: translateY(0) scale(1);
    }
    50% {
        transform: translateY(-20px) scale(1.05);
    }
}

.final-cta-image img {
    width: 100%;
    filter: drop-shadow(0 15px 40px rgba(0, 0, 0, 0.3));
}

.final-cta-text h2 {
    font-size: 28px;
    color: #fff;
    margin-bottom: 2rem;
}

.final-cta-pricing {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 2rem;
}

.final-regular-price {
    font-size: 20px;
    text-decoration: line-through;
    opacity: 0.8;
}

.final-special-price {
    font-size: 36px;
    font-weight: 700;
    color: #FFD700;
}

.btn-final-cta {
    background: #fff;
    color: #4F46E5;
    font-size: 20px;
    padding: 20px 50px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.btn-final-cta:hover {
    background: #f0f0f0;
    transform: translateY(-3px) scale(1.03);
}

.final-cta-note {
    font-size: 14px;
    margin-top: 1rem;
    opacity: 0.9;
}

@media (min-width: 768px) {
    .final-cta-section {
        padding: 80px 0;
    }

    .final-cta-content {
        flex-direction: row;
        text-align: left;
    }

    .final-cta-text h2 {
        font-size: 36px;
    }

    .final-special-price {
        font-size: 48px;
    }
}

/* ============================================
   SECTION 17: FOOTER
   ============================================ */
.footer {
    background: #1a1a1a;
    color: #fff;
    padding: 50px 0 30px;
}

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

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
    margin-bottom: 30px;
}

.footer-links a {
    color: #fff;
    font-size: 14px;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #06B6D4;
}

.footer-separator {
    color: rgba(255, 255, 255, 0.3);
}

.footer-disclaimer {
    max-width: 800px;
    margin: 0 auto 30px;
}

.footer-disclaimer p {
    font-size: 13px;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.7);
}

.footer-social {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 30px;
}

.social-icon {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.social-icon:hover {
    background: linear-gradient(135deg, #4F46E5, #06B6D4);
    transform: translateY(-3px);
}

.social-icon svg {
    width: 20px;
    height: 20px;
}

.footer-copyright {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
}

.footer-copyright p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 0;
}

/* ============================================
   SCROLL TO TOP BUTTON
   ============================================ */
.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, #4F46E5, #06B6D4);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 5px 20px rgba(79, 70, 229, 0.4);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
}

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

.scroll-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(79, 70, 229, 0.5);
}

.scroll-to-top svg {
    width: 24px;
    height: 24px;
}

/* ============================================
   POPUP MODAL
   ============================================ */
.popup-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    padding: 20px;
}

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

.popup-content {
    background: #fff;
    border-radius: 20px;
    padding: 40px 30px;
    max-width: 500px;
    width: 100%;
    position: relative;
    transform: scale(0.8);
    transition: transform 0.3s ease;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.popup-modal.active .popup-content {
    transform: scale(1);
}

.popup-close {
    position: absolute;
    top: 15px;
    right: 15px;
    width: 36px;
    height: 36px;
    background: #f0f0f0;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: #666;
    cursor: pointer;
    transition: all 0.3s ease;
}

.popup-close:hover {
    background: #e0e0e0;
    transform: rotate(90deg);
}

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

.popup-body h3 {
    font-size: 28px;
    margin-bottom: 15px;
    background: linear-gradient(135deg, #4F46E5, #06B6D4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.popup-body p {
    font-size: 16px;
    color: #666;
    margin-bottom: 20px;
}

.popup-price {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    margin-bottom: 25px;
}

.popup-old-price {
    font-size: 24px;
    color: #999;
    text-decoration: line-through;
}

.popup-new-price {
    font-size: 40px;
    font-weight: 700;
    color: #10B981;
}

.btn-popup {
    width: 100%;
    font-size: 18px;
}

@media (max-width: 480px) {
    .popup-content {
        padding: 30px 20px;
    }

    .popup-body h3 {
        font-size: 24px;
    }

    .popup-new-price {
        font-size: 32px;
    }
}

/* ============================================
   PURCHASE NOTIFICATION POPUP
   ============================================ */
.purchase-notification {
    position: fixed;
    bottom: 30px;
    left: 30px;
    background: #fff;
    padding: 15px 20px;
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    display: flex;
    gap: 15px;
    align-items: center;
    z-index: 998;
    opacity: 0;
    visibility: hidden;
    transform: translateX(-100%);
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    max-width: 320px;
}

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

.notification-icon {
    font-size: 30px;
}

.notification-text {
    flex: 1;
}

.notification-name {
    font-weight: 600;
    color: #1a1a1a;
    display: block;
    margin-bottom: 3px;
}

.notification-location {
    color: #666;
}

.notification-text p {
    font-size: 13px;
    color: #10B981;
    margin-bottom: 0;
}

@media (max-width: 480px) {
    .purchase-notification {
        bottom: 15px;
        left: 15px;
        right: 15px;
        max-width: none;
        padding: 12px 15px;
    }
}

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

/* Fade in animation */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Prevent horizontal scroll */
body {
    overflow-x: hidden;
}

/* Loading state */
.loading {
    opacity: 0.5;
    pointer-events: none;
}

/* ============================================
   END OF CSS
   ============================================ */