/* ============================================
   POTENTSTREAM - PREMIUM CSS
   Medical Professional Design for Authority
   Bing-Optimized for Top Rankings
   ============================================ */

:root {
    --primary-color: #1E40AF;
    --secondary-color: #3B82F6;
    --accent-color: #059669;
    --warning-color: #DC2626;
    --text-dark: #1a1a1a;
    --text-light: #666666;
    --bg-light: #f0f9ff;
    --white: #ffffff;
    --border-color: #e0e0e0;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(30, 64, 175, 0.15);
    --gradient-primary: linear-gradient(135deg, #1E40AF 0%, #3B82F6 100%);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
        'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
        sans-serif;
    line-height: 1.7;
    color: var(--text-dark);
    background-color: var(--white);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

h1 {
    font-size: 1.75rem;
}

h2 {
    font-size: 1.5rem;
}

h3 {
    font-size: 1.25rem;
}

h4 {
    font-size: 1.1rem;
}

p {
    margin-bottom: 1rem;
    line-height: 1.8;
    color: var(--text-light);
}

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

a:hover {
    text-decoration: underline;
}

/* ============================================
   CONTAINER & LAYOUT
   ============================================ */

.container {
    width: 100%;
    padding: 0 20px;
    margin: 0 auto;
}

@media (min-width: 480px) {
    .container {
        padding: 0 24px;
    }
}

@media (min-width: 768px) {
    .container {
        max-width: 720px;
        padding: 0 30px;
    }
}

@media (min-width: 1024px) {
    .container {
        max-width: 960px;
    }
}

@media (min-width: 1440px) {
    .container {
        max-width: 1200px;
    }
}

/* ============================================
   BUTTONS & CTAs
   ============================================ */

.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    text-decoration: none;
    min-height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    white-space: nowrap;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(30, 64, 175, 0.25);
    text-decoration: none;
}

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

.btn-lg {
    padding: 16px 40px;
    font-size: 1.1rem;
    min-height: 56px;
}

.btn-xl {
    padding: 20px 50px;
    font-size: 1.2rem;
    min-height: 60px;
}

.btn-full {
    width: 100%;
}

/* ============================================
   NAVIGATION
   ============================================ */

.navbar {
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    background: var(--white);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition);
    border-bottom: 2px solid #e5e7eb;
}

.navbar.scrolled {
    padding: 8px 0;
    box-shadow: var(--shadow-md);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    max-width: 1400px;
    margin: 0 auto;
}

@media (min-width: 480px) {
    .nav-container {
        padding: 16px 24px;
    }
}

.nav-logo h2 {
    margin: 0;
    font-size: 1.6rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
}

.nav-menu {
    display: none;
    flex-direction: column;
    list-style: none;
    gap: 20px;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--white);
    padding: 20px;
    box-shadow: var(--shadow-lg);
    max-height: calc(100vh - 60px);
    overflow-y: auto;
}

.nav-menu.active {
    display: flex;
}

.nav-menu li a {
    color: var(--text-dark);
    font-weight: 500;
    display: block;
    padding: 10px 0;
}

.nav-menu li a.nav-cta {
    background: var(--gradient-primary);
    color: var(--white);
    padding: 12px 24px;
    border-radius: var(--radius-md);
    display: inline-block;
}

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

.hamburger-menu span {
    width: 28px;
    height: 3px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: var(--transition);
}

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

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

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

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

    .nav-menu {
        display: flex !important;
        flex-direction: row;
        position: static;
        background: transparent;
        padding: 0;
        box-shadow: none;
        gap: 30px;
        max-height: none;
    }

    .nav-menu li a.nav-cta {
        margin-left: 20px;
    }
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
    padding: 40px 0;
    background: linear-gradient(135deg, rgba(30, 64, 175, 0.03) 0%, rgba(59, 130, 246, 0.03) 100%);
}

@media (min-width: 768px) {
    .hero {
        padding: 60px 0;
    }
}

.hero-container {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

@media (min-width: 768px) {
    .hero-container {
        flex-direction: row;
        align-items: center;
        gap: 40px;
    }
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    order: -1;
}

@media (min-width: 768px) {
    .hero-image {
        order: 0;
    }
}

.image-wrapper {
    width: 100%;
    max-width: 300px;
}

@media (min-width: 768px) {
    .image-wrapper {
        max-width: 400px;
    }
}

.image-wrapper img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: var(--radius-lg);
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-25px);
    }
}

.animated-product {
    animation: float 3.5s ease-in-out infinite;
}

.hero-content {
    flex: 1;
}

.hero-title {
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
    line-height: 1.3;
    color: var(--primary-color);
}

@media (min-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
}

.hero-subtitle {
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    color: var(--text-light);
}

@media (min-width: 768px) {
    .hero-subtitle {
        font-size: 1.1rem;
    }
}

.hero-benefits {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 2rem;
}

.benefit-item {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    font-size: 0.95rem;
}

.check-icon {
    color: var(--accent-color);
    font-weight: bold;
    font-size: 1.3rem;
    flex-shrink: 0;
    margin-top: 2px;
}

.hero-guarantee {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-top: 1rem;
}

/* ============================================
   SECTION TITLES
   ============================================ */

.section-title {
    font-size: 1.75rem;
    text-align: center;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

@media (min-width: 768px) {
    .section-title {
        font-size: 2.25rem;
    }
}

.section-subtitle {
    text-align: center;
    color: var(--text-light);
    margin-bottom: 2.5rem;
    font-size: 1rem;
}

/* ============================================
   SECTIONS
   ============================================ */

section {
    padding: 40px 0;
}

@media (min-width: 768px) {
    section {
        padding: 60px 0;
    }
}

#why-choose {
    background-color: var(--bg-light);
}

#what-is {
    background: var(--white);
}

#benefits {
    background-color: var(--bg-light);
}

.content-split {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

@media (min-width: 768px) {
    .content-split {
        flex-direction: row;
        align-items: center;
        gap: 40px;
    }
}

.content-text {
    flex: 1;
}

.content-text p {
    margin-bottom: 1.5rem;
}

.content-image {
    flex: 1;
}

.content-image img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

/* ============================================
   CARDS GRID
   ============================================ */

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

@media (min-width: 576px) {
    .cards-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }
}

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

.feature-card {
    background: var(--white);
    padding: 24px;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid #e5e7eb;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--secondary-color);
}

.card-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 16px;
    display: block;
}

.feature-card h3 {
    font-size: 1.1rem;
    margin-bottom: 12px;
    color: var(--primary-color);
}

.feature-card p {
    font-size: 0.95rem;
    color: var(--text-light);
    margin-bottom: 0;
}

/* ============================================
   ACCORDION
   ============================================ */

.accordion {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.accordion-item {
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.accordion-header {
    width: 100%;
    padding: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--white);
    border: none;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-dark);
    transition: var(--transition);
    min-height: 48px;
}

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

.accordion-icon {
    font-size: 1.5rem;
    transition: var(--transition);
    font-weight: bold;
    color: var(--primary-color);
}

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

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    padding: 0 16px;
}

.accordion-item.active .accordion-content {
    max-height: 600px;
    padding: 0 16px 16px 16px;
}

.accordion-content p {
    margin-bottom: 0.5rem;
}

/* ============================================
   TESTIMONIALS
   ============================================ */

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

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

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

.testimonial-card {
    background: var(--white);
    border: 1px solid var(--border-color);
    padding: 24px;
    border-radius: var(--radius-lg);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.testimonial-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

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

.animated-review {
    animation: slideInUp 0.6s ease-out forwards;
}

.review-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 16px;
}

.reviewer-info {
    display: flex;
    gap: 12px;
    flex: 1;
}

.reviewer-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
    border: 2px solid var(--secondary-color);
}

.reviewer-info h4 {
    font-size: 1rem;
    margin-bottom: 4px;
    color: var(--primary-color);
}

.reviewer-info p {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: 0;
}

.rating {
    color: #FCD34D;
    font-size: 0.9rem;
    white-space: nowrap;
}

.review-text {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-light);
    margin: 0;
}

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

.rating-summary img {
    max-width: 200px;
    height: auto;
}

/* ============================================
   PRICING SECTION
   ============================================ */

.pricing-section,
.pricing-section-2 {
    background-color: var(--bg-light);
}

.countdown-timer {
    background: var(--gradient-primary);
    color: var(--white);
    padding: 20px;
    border-radius: var(--radius-lg);
    text-align: center;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-lg);
}

.timer-label {
    display: block;
    font-size: 1rem;
    margin-bottom: 10px;
    font-weight: 600;
}

.timer-display {
    font-size: 2rem;
    font-weight: bold;
    font-family: 'Courier New', monospace;
    letter-spacing: 2px;
}

@media (min-width: 768px) {
    .timer-display {
        font-size: 2.5rem;
    }
}

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

@media (min-width: 768px) {
    .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }
}

@media (min-width: 1024px) {
    .pricing-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 30px;
    }
}

.pricing-card {
    background: var(--white);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    text-align: center;
    position: relative;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.pricing-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.pricing-card.featured {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(30, 64, 175, 0.05) 0%, rgba(59, 130, 246, 0.05) 100%);
    transform: scale(1.02);
}

@media (min-width: 768px) {
    .pricing-card.featured {
        transform: scale(1.05);
    }
}

.plan-badge {
    display: inline-block;
    background: var(--warning-color);
    color: var(--white);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: 0.5px;
}

.featured-badge {
    background: linear-gradient(135deg, #DC2626 0%, #991B1B 100%);
    font-size: 0.8rem;
}

.pricing-card h3 {
    font-size: 1.3rem;
    margin-bottom: 8px;
}

.supply {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 16px;
}

.product-image {
    margin: 20px 0;
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-light);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.product-image img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

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

.price-per {
    color: var(--accent-color);
    font-weight: 600;
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.original-price {
    text-decoration: line-through;
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 4px;
}

.discounted-price {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 16px;
}

.bonus-badges {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin: 16px 0;
}

.badge {
    display: inline-block;
    background: var(--accent-color);
    color: var(--white);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
}

.payment-logos {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
    font-size: 0.85rem;
    color: var(--text-light);
}

/* ============================================
   INGREDIENTS SECTION
   ============================================ */

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

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

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

.ingredient-card {
    background: var(--white);
    border: 1px solid var(--border-color);
    padding: 20px;
    border-radius: var(--radius-lg);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--primary-color);
}

.ingredient-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

.ingredient-card h3 {
    color: var(--primary-color);
    font-size: 1.1rem;
    margin-bottom: 12px;
}

.ingredient-card p {
    font-size: 0.95rem;
    margin-bottom: 12px;
}

.benefits {
    color: var(--accent-color);
    font-size: 0.9rem;
    margin-bottom: 0;
}

/* ============================================
   RESEARCH SECTION
   ============================================ */

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

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

.research-card {
    background: var(--white);
    border-left: 4px solid var(--secondary-color);
    padding: 20px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.research-card h3 {
    color: var(--primary-color);
    margin-bottom: 12px;
}

.research-card p {
    font-size: 0.95rem;
    margin-bottom: 8px;
}

.research-card p:last-child {
    color: var(--text-light);
    font-style: italic;
    font-size: 0.85rem;
}

/* ============================================
   GUARANTEE SECTION
   ============================================ */

.guarantee-content {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

@media (min-width: 768px) {
    .guarantee-content {
        flex-direction: row;
        align-items: center;
        gap: 40px;
    }
}

.guarantee-image {
    flex: 0 0 auto;
    max-width: 250px;
}

@media (min-width: 768px) {
    .guarantee-image {
        flex: 1;
    }
}

.guarantee-image img {
    width: 100%;
    height: auto;
    display: block;
}

.guarantee-text {
    flex: 1;
}

.guarantee-point {
    margin-bottom: 2rem;
}

.guarantee-point h3 {
    color: var(--accent-color);
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.guarantee-point p {
    font-size: 0.95rem;
}

/* ============================================
   BENEFITS SECTION
   ============================================ */

.benefits-list {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.benefit-row {
    background: var(--white);
    padding: 24px;
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--secondary-color);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.benefit-row:hover {
    box-shadow: var(--shadow-lg);
}

.benefit-row h3 {
    color: var(--primary-color);
    margin-bottom: 12px;
    font-size: 1.2rem;
}

.benefit-row p {
    font-size: 0.95rem;
    color: var(--text-light);
    margin-bottom: 0;
}

/* ============================================
   FAQ SECTION
   ============================================ */

.faq-accordion {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.faq-header {
    width: 100%;
    padding: 18px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--white);
    border: none;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-dark);
    transition: var(--transition);
    min-height: 48px;
    text-align: left;
}

.faq-header:hover {
    background-color: var(--bg-light);
    color: var(--primary-color);
}

.faq-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
    margin-left: 12px;
    transition: var(--transition);
    color: var(--primary-color);
}

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

.faq-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    padding: 0 18px;
}

.faq-item.active .faq-content {
    max-height: 800px;
    padding: 0 18px 18px 18px;
}

.faq-content p {
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 0;
}

/* ============================================
   FINAL CTA SECTION
   ============================================ */

.final-cta {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    padding: 40px 0;
}

@media (min-width: 768px) {
    .final-cta {
        padding: 60px 0;
    }
}

.final-cta-content {
    display: flex;
    flex-direction: column;
    gap: 30px;
    align-items: center;
}

@media (min-width: 768px) {
    .final-cta-content {
        flex-direction: row;
        align-items: center;
        gap: 40px;
    }
}

.final-cta-image {
    flex: 1;
    display: flex;
    justify-content: center;
    max-width: 280px;
}

@media (min-width: 768px) {
    .final-cta-image {
        max-width: none;
        order: -1;
    }
}

.final-cta-image img {
    width: 100%;
    height: auto;
    display: block;
}

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

.animated-final-bottle {
    animation: pulse 2s ease-in-out infinite;
}

.final-cta-text {
    flex: 1;
    text-align: center;
}

@media (min-width: 768px) {
    .final-cta-text {
        text-align: left;
    }
}

.final-cta h2 {
    font-size: 2rem;
    color: var(--white);
    margin-bottom: 0.5rem;
}

@media (min-width: 768px) {
    .final-cta h2 {
        font-size: 2.5rem;
    }
}

.final-cta-subtitle {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: rgba(255, 255, 255, 0.95);
}

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

.original-final-price {
    text-decoration: line-through;
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 0.5rem;
}

.special-final-price {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--white);
}

.final-guarantee {
    font-size: 0.9rem;
    margin-top: 1.5rem;
    color: rgba(255, 255, 255, 0.95);
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
    background-color: #0f172a;
    color: var(--white);
    padding: 40px 0 20px;
}

@media (min-width: 768px) {
    .footer {
        padding: 60px 0 20px;
    }
}

.footer-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    margin-bottom: 20px;
}

@media (min-width: 576px) {
    .footer-container {
        grid-template-columns: repeat(2, 1fr);
        padding: 0 24px;
    }
}

@media (min-width: 1024px) {
    .footer-container {
        grid-template-columns: repeat(3, 1fr);
        padding: 0 30px;
    }
}

.footer-column h4 {
    color: var(--white);
    margin-bottom: 16px;
    font-size: 1.1rem;
}

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

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

.footer-column ul li a {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
}

.footer-column ul li a:hover {
    color: var(--secondary-color);
}

.footer-column p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
    margin-bottom: 0;
}

.social-links {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.social-links a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 50%;
    font-size: 1.2rem;
    transition: var(--transition);
    color: var(--white);
}

.social-links a:hover {
    background: var(--secondary-color);
    color: var(--white);
    text-decoration: none;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    max-width: 1400px;
    margin: 0 auto;
    padding-left: 20px;
    padding-right: 20px;
}

@media (min-width: 480px) {
    .footer-bottom {
        padding-left: 24px;
        padding-right: 24px;
    }
}

.footer-bottom p {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 0;
}

/* ============================================
   SCROLL TO TOP BUTTON
   ============================================ */

.scroll-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    color: var(--white);
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    z-index: 999;
}

.scroll-to-top.show {
    display: flex;
}

.scroll-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 28px rgba(30, 64, 175, 0.3);
}

.scroll-to-top:active {
    transform: scale(0.95);
}

/* ============================================
   PURCHASE NOTIFICATION
   ============================================ */

.purchase-notification {
    position: fixed;
    bottom: 20px;
    left: 20px;
    background: var(--white);
    padding: 16px 20px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    max-width: 300px;
    display: none;
    align-items: center;
    gap: 12px;
    z-index: 998;
    animation: slideInLeft 0.3s ease;
    border-left: 4px solid var(--accent-color);
}

.purchase-notification.show {
    display: flex;
}

@keyframes slideInLeft {
    from {
        transform: translateX(-400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.purchase-notification p {
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-dark);
}

/* ============================================
   RESPONSIVE IMAGES
   ============================================ */

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

/* ============================================
   ACCESSIBILITY
   ============================================ */

:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

button:focus-visible,
a:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
    body {
        background: white;
    }

    .navbar,
    .scroll-to-top,
    .purchase-notification {
        display: none !important;
    }

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