/* ========================================
   NEURO DEFENDER - 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: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #1a1a2e;
    background: #ffffff;
    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; /* Prevents zoom on iOS */
}

/* ========================================
   UTILITY CLASSES
   ======================================== */
.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;
    }
}

/* Section Spacing */
section {
    padding: 60px 0;
}

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

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

/* Section Titles */
.section-title {
    font-size: 28px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 16px;
    background: linear-gradient(135deg, #4F46E5 0%, #06B6D4 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

@media (min-width: 768px) {
    .section-title {
        font-size: 36px;
        margin-bottom: 20px;
    }
}

@media (min-width: 1024px) {
    .section-title {
        font-size: 44px;
        margin-bottom: 24px;
    }
}

.section-subtitle {
    text-align: center;
    font-size: 16px;
    color: #666;
    margin-bottom: 32px;
}

@media (min-width: 768px) {
    .section-subtitle {
        font-size: 18px;
        margin-bottom: 40px;
    }
}

/* ========================================
   BUTTONS
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 50px;
    transition: all 0.3s ease;
    min-height: 48px;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, #4F46E5 0%, #06B6D4 100%);
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(79, 70, 229, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(79, 70, 229, 0.4);
}

.btn-primary:active {
    transform: scale(0.98);
}

.btn-lg {
    padding: 18px 36px;
    font-size: 18px;
    min-height: 56px;
}

.btn-xl {
    padding: 20px 40px;
    font-size: 20px;
    min-height: 60px;
}

.btn-block {
    width: 100%;
    display: flex;
}

@media (max-width: 767px) {
    .btn {
        width: 100%;
    }
    
    .btn-lg, .btn-xl {
        font-size: 16px;
        padding: 16px 32px;
    }
}

/* ========================================
   NAVIGATION
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    padding: 8px 0;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.15);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 700;
    background: linear-gradient(135deg, #4F46E5 0%, #06B6D4 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo img {
    width: 45px;
    height: 45px;
    border-radius: 50%;
}

.nav-links {
    display: none;
    list-style: none;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-weight: 500;
    color: #1a1a2e;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, #4F46E5 0%, #06B6D4 100%);
    transition: width 0.3s ease;
}

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

.btn-nav {
    padding: 10px 24px;
    min-height: 40px;
}

/* Hamburger Menu */
.hamburger {
    display: flex;
    flex-direction: column;
    gap: 5px;
    width: 28px;
    height: 24px;
    cursor: pointer;
    z-index: 1001;
}

.hamburger span {
    width: 100%;
    height: 3px;
    background: linear-gradient(135deg, #4F46E5 0%, #06B6D4 100%);
    border-radius: 3px;
    transition: all 0.3s ease;
}

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

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

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

/* Mobile Menu */
@media (max-width: 767px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: linear-gradient(180deg, #ffffff 0%, #f8f9ff 100%);
        flex-direction: column;
        align-items: flex-start;
        padding: 80px 30px 30px;
        box-shadow: -5px 0 25px rgba(0, 0, 0, 0.1);
        transition: right 0.4s cubic-bezier(0.68, -0.55, 0.27, 1.55);
        gap: 24px;
    }
    
    .nav-links.active {
        right: 0;
        display: flex;
    }
    
    .nav-link {
        width: 100%;
        padding: 12px 0;
        font-size: 18px;
    }
    
    .btn-nav {
        width: 100%;
        margin-top: 20px;
    }
}

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

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
    padding-top: 100px;
    background: linear-gradient(135deg, #f8f9ff 0%, #e8f4f8 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(79, 70, 229, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 20s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(6, 182, 212, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 15s ease-in-out infinite reverse;
}

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

.hero-image {
    width: 100%;
    max-width: 500px;
    position: relative;
    animation: heroImageFloat 3s ease-in-out infinite;
}

.product-image-hero {
    width: 100%;
    height: auto;
    filter: drop-shadow(0 20px 40px rgba(79, 70, 229, 0.3));
    animation: productRotate 20s linear infinite;
}

@keyframes productRotate {
    0%, 100% {
        transform: rotateY(0deg) scale(1);
    }
    25% {
        transform: rotateY(10deg) scale(1.05);
    }
    50% {
        transform: rotateY(0deg) scale(1.1);
    }
    75% {
        transform: rotateY(-10deg) scale(1.05);
    }
}

@keyframes heroImageFloat {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

.floating-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: linear-gradient(135deg, #EF4444 0%, #F59E0B 100%);
    color: #ffffff;
    padding: 10px 20px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 14px;
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.3);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 4px 15px rgba(239, 68, 68, 0.3);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 8px 25px rgba(239, 68, 68, 0.5);
    }
}

.glow-effect {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120%;
    height: 120%;
    background: radial-gradient(circle, rgba(79, 70, 229, 0.2) 0%, transparent 70%);
    border-radius: 50%;
    filter: blur(40px);
    z-index: -1;
    animation: glowPulse 3s ease-in-out infinite;
}

@keyframes glowPulse {
    0%, 100% {
        opacity: 0.5;
        transform: translate(-50%, -50%) scale(1);
    }
    50% {
        opacity: 0.8;
        transform: translate(-50%, -50%) scale(1.1);
    }
}

.hero-content {
    width: 100%;
    text-align: center;
}

.hero-content h1 {
    font-size: 32px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    background: linear-gradient(135deg, #1a1a2e 0%, #4F46E5 50%, #06B6D4 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 0.8s ease-out;
}

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

.hero-content p {
    font-size: 16px;
    line-height: 1.8;
    color: #4a5568;
    margin-bottom: 20px;
    animation: fadeInUp 1s ease-out;
}

.hero-content .btn {
    margin: 32px auto;
    animation: fadeInUp 1.2s ease-out;
}

.pulse-animation {
    animation: btnPulse 2s ease-in-out infinite;
}

@keyframes btnPulse {
    0%, 100% {
        box-shadow: 0 4px 15px rgba(79, 70, 229, 0.3);
    }
    50% {
        box-shadow: 0 8px 30px rgba(79, 70, 229, 0.5);
    }
}

.hero-trust {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-top: 32px;
    animation: fadeInUp 1.4s ease-out;
}

.trust-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-size: 14px;
    color: #4a5568;
    font-weight: 500;
}

.trust-item svg {
    stroke: #10B981;
    flex-shrink: 0;
}

@media (min-width: 768px) {
    .hero-container {
        flex-direction: row;
        gap: 60px;
    }
    
    .hero-image {
        width: 45%;
    }
    
    .hero-content {
        width: 55%;
        text-align: left;
    }
    
    .hero-content h1 {
        font-size: 42px;
    }
    
    .hero-content p {
        font-size: 17px;
    }
    
    .hero-content .btn {
        margin: 32px 0;
    }
    
    .hero-trust {
        flex-direction: row;
        gap: 32px;
    }
}

@media (min-width: 1024px) {
    .hero-content h1 {
        font-size: 52px;
    }
    
    .hero-content p {
        font-size: 18px;
    }
}

/* ========================================
   WHY CHOOSE US SECTION
   ======================================== */
.why-choose {
    background: #ffffff;
}

.badges-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

.badge-card {
    background: linear-gradient(135deg, #f8f9ff 0%, #ffffff 100%);
    border: 2px solid transparent;
    background-clip: padding-box;
    border-radius: 20px;
    padding: 32px 24px;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.27, 1.55);
    position: relative;
    overflow: hidden;
    opacity: 0;
    transform: translateY(30px);
}

.badge-card::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(135deg, #4F46E5 0%, #06B6D4 100%);
    border-radius: 20px;
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.badge-card:hover::before {
    opacity: 1;
}

.badge-card:hover {
    transform: translateY(-10px) scale(1.02) rotate(1deg);
    box-shadow: 0 20px 40px rgba(79, 70, 229, 0.2);
}

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

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

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

.badge-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: #1a1a2e;
}

.badge-card p {
    font-size: 15px;
    line-height: 1.7;
    color: #4a5568;
}

@media (min-width: 576px) {
    .badges-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }
}

@media (min-width: 992px) {
    .badges-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .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;
    }
}

/* ========================================
   WHAT IS SECTION
   ======================================== */
.what-is {
    background: linear-gradient(135deg, #f8f9ff 0%, #e8f4f8 100%);
}

.content-split {
    display: flex;
    flex-direction: column;
    gap: 40px;
    align-items: center;
}

.content-text {
    width: 100%;
}

.content-text p {
    font-size: 16px;
    line-height: 1.8;
    color: #4a5568;
    margin-bottom: 20px;
}

.content-image {
    width: 100%;
    max-width: 500px;
}

.content-image img {
    width: 100%;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(79, 70, 229, 0.2);
}

@media (min-width: 768px) {
    .content-split {
        flex-direction: row;
        gap: 60px;
    }
    
    .content-text {
        width: 55%;
    }
    
    .content-image {
        width: 45%;
    }
    
    .content-text p {
        font-size: 17px;
    }
}

/* ========================================
   HOW IT WORKS SECTION
   ======================================== */
.how-it-works {
    background: #ffffff;
}

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

.accordion-item {
    background: #ffffff;
    border: 2px solid #e5e7eb;
    border-radius: 16px;
    margin-bottom: 16px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.accordion-item:hover {
    border-color: #4F46E5;
}

.accordion-header {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    background: linear-gradient(135deg, #f8f9ff 0%, #ffffff 100%);
    font-size: 16px;
    font-weight: 600;
    color: #1a1a2e;
    cursor: pointer;
    transition: all 0.3s ease;
    min-height: 44px;
}

.accordion-header:hover {
    background: linear-gradient(135deg, #4F46E5 0%, #06B6D4 100%);
    color: #ffffff;
}

.accordion-header span {
    text-align: left;
}

.accordion-icon {
    flex-shrink: 0;
    transition: transform 0.3s ease;
}

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

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
    padding: 0 24px;
}

.accordion-item.active .accordion-content {
    max-height: 500px;
    padding: 20px 24px;
}

.accordion-content p {
    font-size: 15px;
    line-height: 1.8;
    color: #4a5568;
}

@media (min-width: 768px) {
    .accordion-header {
        font-size: 18px;
        padding: 24px 28px;
    }
    
    .accordion-content p {
        font-size: 16px;
    }
}

/* ========================================
   REVIEWS SECTION
   ======================================== */
.reviews {
    background: linear-gradient(135deg, #f8f9ff 0%, #e8f4f8 100%);
}

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

.review-card {
    background: #ffffff;
    border-radius: 20px;
    padding: 32px 24px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(30px);
}

.review-card.aos-animate {
    opacity: 1;
    transform: translateY(0);
    animation: reviewFloat 3s ease-in-out infinite;
}

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

.review-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(79, 70, 229, 0.15);
}

.review-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
}

.review-avatar {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid #4F46E5;
    box-shadow: 0 4px 15px rgba(79, 70, 229, 0.3);
}

.review-info h4 {
    font-size: 18px;
    font-weight: 700;
    color: #1a1a2e;
    margin-bottom: 4px;
}

.review-info p {
    font-size: 14px;
    color: #6b7280;
    margin-bottom: 8px;
}

.stars {
    font-size: 16px;
    color: #F59E0B;
}

.review-text {
    font-size: 15px;
    line-height: 1.7;
    color: #4a5568;
    font-style: italic;
}

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

@media (min-width: 992px) {
    .reviews-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .review-card:nth-child(1) {
        animation-delay: 0s;
    }
    
    .review-card:nth-child(2) {
        animation-delay: 0.5s;
    }
    
    .review-card:nth-child(3) {
        animation-delay: 1s;
    }
}

/* ========================================
   PRICING SECTION
   ======================================== */
.pricing {
    background: #ffffff;
}

.countdown-timer {
    background: linear-gradient(135deg, #EF4444 0%, #F59E0B 100%);
    color: #ffffff;
    padding: 24px;
    border-radius: 20px;
    text-align: center;
    margin-bottom: 48px;
    box-shadow: 0 10px 30px rgba(239, 68, 68, 0.3);
}

.timer-label {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
}

.timer-display {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    font-size: 48px;
    font-weight: 800;
}

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

.timer-segment span {
    background: rgba(255, 255, 255, 0.2);
    padding: 12px 20px;
    border-radius: 12px;
    min-width: 80px;
}

.timer-segment label {
    font-size: 12px;
    font-weight: 500;
    margin-top: 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.timer-colon {
    font-size: 36px;
}

@media (min-width: 768px) {
    .timer-display {
        font-size: 56px;
    }
    
    .timer-segment span {
        min-width: 100px;
        padding: 16px 24px;
    }
}

.pricing-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
    margin-bottom: 40px;
}

.pricing-card {
    background: linear-gradient(135deg, #f8f9ff 0%, #ffffff 100%);
    border: 2px solid #e5e7eb;
    border-radius: 24px;
    padding: 32px 24px;
    text-align: center;
    transition: all 0.4s ease;
    position: relative;
}

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(79, 70, 229, 0.15);
    border-color: #4F46E5;
}

.pricing-card.popular {
    background: linear-gradient(135deg, #4F46E5 0%, #06B6D4 100%);
    color: #ffffff;
    border: none;
    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: linear-gradient(135deg, #EF4444 0%, #F59E0B 100%);
    color: #ffffff;
    padding: 8px 24px;
    border-radius: 20px;
    font-weight: 700;
    font-size: 14px;
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.4);
}

.pricing-label {
    font-size: 14px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 12px;
    color: #4F46E5;
}

.pricing-card.popular .pricing-label {
    color: #ffffff;
}

.pricing-bottles {
    font-size: 24px;
    font-weight: 800;
    margin-bottom: 8px;
}

.pricing-supply {
    font-size: 14px;
    margin-bottom: 24px;
    opacity: 0.8;
}

.pricing-image {
    margin: 24px 0;
}

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

.pricing-price {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 16px;
}

.price-per {
    font-size: 48px;
    font-weight: 800;
    line-height: 1;
}

.price-label {
    font-size: 14px;
    opacity: 0.8;
}

.pricing-total {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 20px;
    font-size: 20px;
}

.old-price {
    text-decoration: line-through;
    opacity: 0.6;
}

.new-price {
    font-weight: 800;
    color: #10B981;
}

.pricing-card.popular .new-price {
    color: #ffffff;
}

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

.badge-free,
.badge-shipping {
    background: rgba(16, 185, 129, 0.1);
    color: #10B981;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
}

.pricing-card.popular .badge-free,
.pricing-card.popular .badge-shipping {
    background: rgba(255, 255, 255, 0.2);
    color: #ffffff;
}

.pricing-card .btn {
    margin: 20px 0;
}

.payment-logos {
    margin-top: 16px;
    opacity: 0.8;
}

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

.rating-badge {
    text-align: center;
}

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

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

@media (min-width: 992px) {
    .pricing-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ========================================
   INGREDIENTS SECTION
   ======================================== */
.ingredients {
    background: linear-gradient(135deg, #f8f9ff 0%, #e8f4f8 100%);
}

.ingredients-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.ingredient-card {
    background: #ffffff;
    border-left: 4px solid #4F46E5;
    border-radius: 12px;
    padding: 24px;
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateX(-20px);
}

.ingredient-card.aos-animate {
    opacity: 1;
    transform: translateX(0);
}

.ingredient-card:hover {
    transform: translateX(10px);
    box-shadow: 0 10px 30px rgba(79, 70, 229, 0.1);
    border-left-width: 6px;
}

.ingredient-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: #1a1a2e;
    margin-bottom: 12px;
    background: linear-gradient(135deg, #4F46E5 0%, #06B6D4 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.ingredient-card p {
    font-size: 15px;
    line-height: 1.7;
    color: #4a5568;
}

@media (min-width: 768px) {
    .ingredients-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }
}

/* ========================================
   SCIENTIFIC EVIDENCE SECTION
   ======================================== */
.scientific-evidence {
    background: #ffffff;
}

.evidence-content {
    max-width: 900px;
    margin: 0 auto;
}

.evidence-section {
    background: linear-gradient(135deg, #f8f9ff 0%, #ffffff 100%);
    border-radius: 16px;
    padding: 28px 24px;
    margin-bottom: 24px;
    border-left: 4px solid #06B6D4;
}

.evidence-section h3 {
    font-size: 20px;
    font-weight: 700;
    color: #1a1a2e;
    margin-bottom: 12px;
}

.evidence-section p {
    font-size: 15px;
    line-height: 1.8;
    color: #4a5568;
}

@media (min-width: 768px) {
    .evidence-section {
        padding: 32px 28px;
    }
    
    .evidence-section h3 {
        font-size: 22px;
    }
    
    .evidence-section p {
        font-size: 16px;
    }
}

/* ========================================
   GUARANTEE SECTION
   ======================================== */
.guarantee {
    background: linear-gradient(135deg, #f8f9ff 0%, #e8f4f8 100%);
}

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

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

.guarantee-image img {
    width: 100%;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(79, 70, 229, 0.2);
}

.guarantee-text {
    width: 100%;
}

.guarantee-point {
    display: flex;
    gap: 20px;
    margin-bottom: 32px;
}

.point-icon {
    font-size: 28px;
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #10B981 0%, #06B6D4 100%);
    border-radius: 50%;
    color: #ffffff;
}

.point-content h3 {
    font-size: 20px;
    font-weight: 700;
    color: #1a1a2e;
    margin-bottom: 12px;
}

.point-content p {
    font-size: 15px;
    line-height: 1.7;
    color: #4a5568;
}

@media (min-width: 768px) {
    .guarantee-content {
        flex-direction: row;
        gap: 60px;
    }
    
    .guarantee-image {
        width: 40%;
    }
    
    .guarantee-text {
        width: 60%;
    }
    
    .point-content h3 {
        font-size: 22px;
    }
    
    .point-content p {
        font-size: 16px;
    }
}

/* ========================================
   BENEFITS SECTION
   ======================================== */
.benefits {
    background: #ffffff;
}

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

.benefit-item {
    display: flex;
    gap: 20px;
    margin-bottom: 28px;
    opacity: 0;
    transform: translateX(-30px);
    transition: all 0.5s ease;
}

.benefit-item.aos-animate {
    opacity: 1;
    transform: translateX(0);
}

.benefit-icon {
    width: 36px;
    height: 36px;
    flex-shrink: 0;
    background: linear-gradient(135deg, #10B981 0%, #06B6D4 100%);
    color: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 700;
}

.benefit-content h3 {
    font-size: 18px;
    font-weight: 700;
    color: #1a1a2e;
    margin-bottom: 8px;
}

.benefit-content p {
    font-size: 15px;
    line-height: 1.7;
    color: #4a5568;
}

@media (min-width: 768px) {
    .benefit-icon {
        width: 44px;
        height: 44px;
        font-size: 24px;
    }
    
    .benefit-content h3 {
        font-size: 20px;
    }
    
    .benefit-content p {
        font-size: 16px;
    }
}

/* ========================================
   FAQ SECTION
   ======================================== */
.faq {
    background: linear-gradient(135deg, #f8f9ff 0%, #e8f4f8 100%);
}

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

.faq-item {
    background: #ffffff;
    border: 2px solid #e5e7eb;
    border-radius: 16px;
    margin-bottom: 16px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item:hover {
    border-color: #4F46E5;
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    background: linear-gradient(135deg, #f8f9ff 0%, #ffffff 100%);
    font-size: 16px;
    font-weight: 600;
    color: #1a1a2e;
    cursor: pointer;
    transition: all 0.3s ease;
    min-height: 44px;
    text-align: left;
}

.faq-question:hover {
    background: linear-gradient(135deg, #4F46E5 0%, #06B6D4 100%);
    color: #ffffff;
}

.faq-icon {
    flex-shrink: 0;
    transition: transform 0.3s ease;
}

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
    padding: 0 24px;
}

.faq-item.active .faq-answer {
    max-height: 600px;
    padding: 20px 24px;
}

.faq-answer p {
    font-size: 15px;
    line-height: 1.8;
    color: #4a5568;
}

@media (min-width: 768px) {
    .faq-question {
        font-size: 18px;
        padding: 24px 28px;
    }
    
    .faq-answer p {
        font-size: 16px;
    }
}

/* ========================================
   FINAL CTA SECTION
   ======================================== */
.final-cta {
    background: linear-gradient(135deg, #1a1a2e 0%, #4F46E5 50%, #06B6D4 100%);
    color: #ffffff;
    position: relative;
    overflow: hidden;
}

.final-cta::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -25%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 15s ease-in-out infinite;
}

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

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

.final-cta-image {
    width: 100%;
    max-width: 400px;
    position: relative;
}

.cta-product-image {
    width: 100%;
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.3));
    animation: ctaFloat 4s ease-in-out infinite;
}

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

.cta-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120%;
    height: 120%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.3) 0%, transparent 70%);
    border-radius: 50%;
    filter: blur(60px);
    z-index: -1;
    animation: ctaGlowPulse 3s ease-in-out infinite;
}

@keyframes ctaGlowPulse {
    0%, 100% {
        opacity: 0.5;
        transform: translate(-50%, -50%) scale(1);
    }
    50% {
        opacity: 0.9;
        transform: translate(-50%, -50%) scale(1.2);
    }
}

.final-cta-text {
    width: 100%;
    text-align: center;
}

.final-cta-text h2 {
    font-size: 28px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 28px;
}

.final-pricing {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    margin-bottom: 32px;
}

.regular-price {
    font-size: 18px;
    opacity: 0.8;
}

.regular-price strike {
    color: #EF4444;
}

.special-price {
    font-size: 36px;
    font-weight: 800;
    color: #10B981;
    text-shadow: 0 2px 10px rgba(16, 185, 129, 0.5);
}

.cta-shake {
    animation: shake 1.5s ease-in-out infinite;
}

@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }
    10%, 30%, 50%, 70%, 90% {
        transform: translateX(-5px);
    }
    20%, 40%, 60%, 80% {
        transform: translateX(5px);
    }
}

.cta-guarantee {
    font-size: 14px;
    margin-top: 24px;
    opacity: 0.9;
}

@media (min-width: 768px) {
    .final-cta-content {
        flex-direction: row;
        gap: 60px;
    }
    
    .final-cta-image {
        width: 40%;
    }
    
    .final-cta-text {
        width: 60%;
        text-align: left;
    }
    
    .final-cta-text h2 {
        font-size: 36px;
    }
    
    .special-price {
        font-size: 48px;
    }
    
    .final-pricing {
        align-items: flex-start;
    }
}

@media (min-width: 1024px) {
    .final-cta-text h2 {
        font-size: 42px;
    }
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
    background: #1a1a2e;
    color: #ffffff;
    padding: 60px 0 30px;
}

.footer-links {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    margin-bottom: 32px;
}

.footer-links a {
    color: #ffffff;
    font-size: 15px;
    transition: color 0.3s ease;
}

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

.footer-disclaimer {
    background: rgba(255, 255, 255, 0.05);
    padding: 24px;
    border-radius: 12px;
    margin-bottom: 32px;
}

.footer-disclaimer p {
    font-size: 13px;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.8);
    text-align: center;
}

.footer-social {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 24px;
}

.footer-social 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 0.3s ease;
}

.footer-social a:hover {
    background: linear-gradient(135deg, #4F46E5 0%, #06B6D4 100%);
    transform: translateY(-4px);
}

.footer-copyright {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

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

@media (min-width: 768px) {
    .footer-links {
        flex-direction: row;
        justify-content: center;
        gap: 32px;
    }
    
    .footer-disclaimer p {
        font-size: 14px;
    }
}

/* ========================================
   SCROLL TO TOP BUTTON
   ======================================== */
.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, #4F46E5 0%, #06B6D4 100%);
    color: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(79, 70, 229, 0.4);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
}

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

.scroll-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(79, 70, 229, 0.6);
}

/* ========================================
   PURCHASE POPUP NOTIFICATION
   ======================================== */
.purchase-popup {
    position: fixed;
    bottom: 30px;
    left: 30px;
    background: #ffffff;
    border-radius: 16px;
    padding: 16px 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    z-index: 998;
    opacity: 0;
    visibility: hidden;
    transform: translateX(-100%);
    transition: all 0.5s cubic-bezier(0.68, -0.55, 0.27, 1.55);
    max-width: 320px;
}

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

.popup-content {
    display: flex;
    align-items: center;
    gap: 12px;
}

.popup-icon {
    font-size: 24px;
    flex-shrink: 0;
}

.popup-text {
    font-size: 14px;
    color: #1a1a2e;
}

.popup-text strong {
    display: block;
    font-weight: 700;
    margin-bottom: 4px;
}

.popup-time {
    display: block;
    font-size: 12px;
    color: #6b7280;
    margin-top: 4px;
}

@media (max-width: 767px) {
    .purchase-popup {
        left: 20px;
        right: 20px;
        bottom: 20px;
        max-width: calc(100% - 40px);
    }
}

/* ========================================
   CTA POPUP
   ======================================== */
.cta-popup {
    position: fixed;
    bottom: -100%;
    left: 0;
    width: 100%;
    background: linear-gradient(135deg, #4F46E5 0%, #06B6D4 100%);
    color: #ffffff;
    z-index: 997;
    box-shadow: 0 -5px 30px rgba(0, 0, 0, 0.2);
    transition: bottom 0.5s cubic-bezier(0.68, -0.55, 0.27, 1.55);
}

.cta-popup.show {
    bottom: 0;
}

.popup-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.2);
    color: #ffffff;
    border-radius: 50%;
    font-size: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.popup-close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: rotate(90deg);
}

.popup-body {
    padding: 32px 24px;
    text-align: center;
}

.popup-body h3 {
    font-size: 24px;
    font-weight: 800;
    margin-bottom: 12px;
}

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

.popup-price {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 24px;
}

.popup-old-price {
    font-size: 24px;
    text-decoration: line-through;
    opacity: 0.7;
}

.popup-new-price {
    font-size: 42px;
    font-weight: 800;
    color: #10B981;
}

.btn-popup {
    background: #ffffff;
    color: #4F46E5;
    font-weight: 700;
    margin-bottom: 16px;
}

.btn-popup:hover {
    background: #f8f9ff;
}

.popup-guarantee {
    font-size: 13px;
    opacity: 0.9;
}

@media (min-width: 768px) {
    .cta-popup {
        bottom: -50%;
        left: 50%;
        transform: translateX(-50%);
        width: 90%;
        max-width: 600px;
        border-radius: 24px 24px 0 0;
    }
    
    .cta-popup.show {
        bottom: 0;
    }
}

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

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ========================================
   REDUCED MOTION SUPPORT
   ======================================== */
@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 {
    .navbar,
    .scroll-to-top,
    .purchase-popup,
    .cta-popup {
        display: none !important;
    }
}