/* ============================================
   PICARD Editorial - Premium News Article Style
   Fully Responsive | Editorial Magazine Layout
   ============================================ */

:root {
    /* Pesto-Inspired Green Palette */
    --color-bg: #FDFCFA;
    --color-bg-alt: #F7F5F1;
    --color-primary: #1A1A1A;
    --color-text: #3D3D3D;
    --color-text-light: #6B6B6B;
    --color-accent: #5C7C4A;
    --color-accent-light: #7A9C64;
    --color-accent-dark: #4A6639;
    --color-border: #E5E2DD;
    --color-white: #FFFFFF;
    
    /* Typography */
    --font-display: 'Playfair Display', Georgia, serif;
    --font-body: 'Inter', -apple-system, sans-serif;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    /* Layout */
    --max-width: 1100px;
    --content-width: 680px;
    
    /* Transitions */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.8;
    color: var(--color-text);
    background: var(--color-bg);
}

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

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--color-accent-dark);
}

/* Typography */
h1, h2, h3, h4 {
    font-family: var(--font-display);
    font-weight: 400;
    color: var(--color-primary);
    line-height: 1.25;
}

h1 {
    font-size: clamp(1.875rem, 4vw, 2.75rem);
    letter-spacing: -0.01em;
}

h2 {
    font-size: clamp(1.375rem, 2.5vw, 1.75rem);
    letter-spacing: -0.005em;
}

h3 {
    font-size: 1.0625rem;
    font-family: var(--font-body);
    font-weight: 600;
}

p {
    margin-bottom: 1.125rem;
    color: var(--color-text);
}

/* Container */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.container--narrow {
    max-width: var(--content-width);
}

/* ============================================
   Affiliate Disclosure Banner
   ============================================ */
.affiliate-banner {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    background: #2d2d2d;
    border-bottom: 1px solid rgba(92, 124, 74, 0.4);
    padding: 0.5rem var(--space-lg);
    text-align: center;
    z-index: 102;
}

.affiliate-banner__text {
    font-size: 0.7rem;
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: 0;
    line-height: 1.5;
    letter-spacing: 0.01em;
}

.affiliate-banner__text strong {
    color: var(--color-accent-light);
    font-weight: 600;
}

/* ============================================
   Header
   ============================================ */
.header {
    position: fixed;
    top: 2.1rem;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(253, 252, 250, 0.97);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-md) 0;
}

.header__inner {
    display: flex;
    justify-content: center;
    text-align: center;
}

.header__logo {
    font-family: var(--font-display);
    font-size: 1rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--color-primary);
}

.header__tagline {
    font-size: 0.55rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-text-light);
    margin-top: var(--space-xs);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    padding: calc(5rem + 2rem + 2.1rem) 0 var(--space-2xl);
    text-align: center;
}

.hero__label {
    display: inline-block;
    font-size: 0.6rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--space-lg);
    text-shadow: none;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.hero__meta {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
    font-size: 0.75rem;
    color: var(--color-text-light);
    margin-bottom: var(--space-lg);
}

.hero__meta-item {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.hero__meta-item::after {
    content: '·';
    margin-left: var(--space-md);
    color: var(--color-border);
}

.hero__meta-item:last-child::after {
    display: none;
}

.hero__title {
    max-width: 800px;
    margin: 0 auto var(--space-lg);
}

.hero__title em {
    font-style: italic;
    color: var(--color-text-light);
    font-weight: 400;
}

.hero__subtitle {
    font-family: var(--font-display);
    font-size: 1rem;
    font-style: italic;
    color: var(--color-text-light);
    max-width: 520px;
    margin: 0 auto;
    line-height: 1.65;
}

/* ============================================
   Featured Image - News Article Style
   ============================================ */
.featured-image {
    padding: 0 var(--space-lg);
    margin-bottom: var(--space-xl);
}

.featured-image__inner {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    overflow: hidden;
}

.featured-image img {
    width: 100%;
    aspect-ratio: 16/9;
    object-fit: cover;
    border-radius: 2px;
}

.featured-image__caption {
    text-align: center;
    font-size: 0.7rem;
    color: var(--color-text-light);
    font-style: italic;
    margin-top: var(--space-sm);
    letter-spacing: 0.02em;
}

/* ============================================
   Article Content
   ============================================ */
.article {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.article__lead {
    font-size: 1.0625rem;
    line-height: 1.85;
    color: var(--color-text);
    margin-bottom: var(--space-2xl);
    font-weight: 400;
}

.article__section {
    margin-bottom: var(--space-2xl);
}

.article__heading {
    font-family: var(--font-display);
    font-size: 1.375rem;
    font-weight: 400;
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--color-border);
}

.article__heading--small {
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-top: var(--space-xl);
    margin-bottom: var(--space-md);
    padding-bottom: 0;
    border-bottom: none;
}

/* ============================================
   Inline Images - News Style
   ============================================ */
.article__image {
    margin: var(--space-xl) 0;
}

.article__image img {
    width: 100%;
    aspect-ratio: 3/2;
    object-fit: cover;
    border-radius: 2px;
}

/* Image Grid - 2 Column */
.image-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
    margin: var(--space-xl) 0;
}

.image-grid__item {
    overflow: hidden;
    background: var(--color-bg-alt);
}

.image-grid__item img {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
    transition: transform 0.5s var(--ease-out);
}

.image-grid__item:hover img {
    transform: scale(1.03);
}

/* Image Grid - 3 Column */
.image-grid--3 {
    grid-template-columns: repeat(3, 1fr);
}

/* ============================================
   Stats Row
   ============================================ */
.stats-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
    margin: var(--space-xl) 0;
    padding: var(--space-lg);
    background: var(--color-bg-alt);
    border-radius: 2px;
}

.stat-box {
    text-align: center;
}

.stat-box__value {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--color-accent);
    display: block;
}

.stat-box__label {
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--color-text-light);
}

/* ============================================
   Highlight Box
   ============================================ */
.highlight-box {
    position: relative;
    padding: var(--space-lg) var(--space-xl);
    padding-left: calc(var(--space-xl) + 1rem);
    background: linear-gradient(135deg, #F8FAF7 0%, #F5F7F2 100%);
    border-left: 2px solid var(--color-accent);
    margin: var(--space-xl) 0;
}

.highlight-box__title {
    font-size: 0.6rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
}

.highlight-box__content {
    font-size: 0.9rem;
    color: var(--color-text);
    line-height: 1.75;
    margin-bottom: 0;
}

/* ============================================
   Pull Quote
   ============================================ */
.pullquote {
    position: relative;
    text-align: center;
    padding: var(--space-2xl) var(--space-lg);
    margin: var(--space-2xl) calc(-1 * var(--space-xl));
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.pullquote__text {
    font-family: var(--font-display);
    font-size: clamp(1.125rem, 2.5vw, 1.375rem);
    font-style: italic;
    color: var(--color-primary);
    line-height: 1.5;
    max-width: 550px;
    margin: 0 auto var(--space-md);
}

.pullquote__author {
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--color-text-light);
}

/* ============================================
   Product Card - Editorial Style
   ============================================ */
.product-card {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: var(--space-xl);
    margin: var(--space-2xl) 0;
    padding: var(--space-lg);
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: 3px;
}

.product-card__image {
    overflow: hidden;
    background: var(--color-bg-alt);
}

.product-card__image img {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
    transition: transform 0.5s var(--ease-out);
}

.product-card__image:hover img {
    transform: scale(1.02);
}

.product-card__content {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.product-card__content .cta-button {
    align-self: flex-start;
}

.product-card__name {
    font-family: var(--font-display);
    font-size: 1.5rem;
    margin-bottom: var(--space-xs);
}

.product-card__tagline {
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-style: italic;
    color: var(--color-text-light);
    margin-bottom: var(--space-sm);
}

.product-card__price {
    font-family: var(--font-display);
    font-size: 1.25rem;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
}

.product-card__features {
    list-style: none;
    margin-bottom: var(--space-lg);
}

.product-card__features li {
    position: relative;
    padding-left: var(--space-md);
    margin-bottom: var(--space-xs);
    font-size: 0.85rem;
    color: var(--color-text);
}

.product-card__features li::before {
    content: '–';
    position: absolute;
    left: 0;
    color: var(--color-accent);
}

/* ============================================
   Feature List - News Style with SVG Icons
   ============================================ */
.feature-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
    margin: var(--space-xl) 0;
}

.feature-item {
    padding: var(--space-lg);
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: 2px;
}

.feature-item__icon {
    width: 36px;
    height: 36px;
    margin-bottom: var(--space-sm);
    color: var(--color-accent);
}

.feature-item__icon svg {
    width: 100%;
    height: 100%;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.5;
}

.feature-item__title {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
    color: var(--color-primary);
}

.feature-item__text {
    font-size: 0.8rem;
    color: var(--color-text-light);
    line-height: 1.65;
    margin-bottom: 0;
}

/* ============================================
   Usage Cards with SVG Icons
   ============================================ */
.usage-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
    margin: var(--space-xl) 0;
}

.usage-card {
    text-align: center;
    padding: var(--space-lg);
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: 2px;
}

.usage-card__icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--space-sm);
    color: var(--color-accent);
}

.usage-card__icon svg {
    width: 100%;
    height: 100%;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.5;
}

.usage-card__title {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--space-xs);
}

.usage-card__text {
    font-size: 0.75rem;
    color: var(--color-text-light);
    margin-bottom: 0;
    line-height: 1.5;
}

/* ============================================
   Testimonials
   ============================================ */
.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    margin: var(--space-xl) 0;
}

.testimonial-card {
    padding: var(--space-lg);
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: 2px;
    position: relative;
}

.testimonial-card::before {
    content: '"';
    position: absolute;
    top: 0.75rem;
    left: 1rem;
    font-family: var(--font-display);
    font-size: 2.5rem;
    color: var(--color-border);
    line-height: 1;
}

.testimonial-card__text {
    font-size: 0.85rem;
    font-style: italic;
    color: var(--color-text);
    margin-bottom: var(--space-md);
    line-height: 1.7;
    position: relative;
    z-index: 1;
}

.testimonial-card__author {
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-light);
}

/* ============================================
   Expert Opinion
   ============================================ */
.expert-card {
    display: grid;
    grid-template-columns: 60px 1fr;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background: var(--color-bg-alt);
    border-radius: 2px;
    margin: var(--space-xl) 0;
}

.expert-card__avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--color-accent);
    color: var(--color-white);
    font-family: var(--font-display);
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.expert-card__label {
    font-size: 0.6rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--space-xs);
}

.expert-card__name {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0;
}

.expert-card__title {
    font-size: 0.75rem;
    color: var(--color-text-light);
    margin-bottom: var(--space-sm);
}

.expert-card__quote {
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-style: italic;
    line-height: 1.7;
    color: var(--color-text);
}

/* ============================================
   Pros & Cons
   ============================================ */
.pros-cons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
    margin: var(--space-xl) 0;
}

.pros-cons__column {
    padding: var(--space-lg);
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: 2px;
}

.pros-cons__title {
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: var(--space-md);
}

.pros-cons--pros .pros-cons__title {
    color: var(--color-accent);
}

.pros-cons--cons .pros-cons__title {
    color: #8B7355;
}

.pros-cons__list {
    list-style: none;
}

.pros-cons__list li {
    position: relative;
    padding-left: var(--space-md);
    margin-bottom: var(--space-sm);
    font-size: 0.85rem;
    color: var(--color-text);
}

.pros-cons__list li::before {
    position: absolute;
    left: 0;
}

.pros-cons--pros .pros-cons__list li::before {
    content: '+';
    color: var(--color-accent);
}

.pros-cons--cons .pros-cons__list li::before {
    content: '–';
    color: #8B7355;
}

/* ============================================
   FAQ
   ============================================ */
.faq-list {
    margin: var(--space-lg) 0;
    border-top: 1px solid var(--color-border);
}

.faq-item {
    border-bottom: 1px solid var(--color-border);
}

.faq-item__question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md) 0;
    background: none;
    border: none;
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 500;
    text-align: left;
    color: var(--color-primary);
    cursor: pointer;
    transition: color 0.2s ease;
}

.faq-item__question:hover {
    color: var(--color-accent);
}

.faq-item__icon {
    position: relative;
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

.faq-item__icon::before,
.faq-item__icon::after {
    content: '';
    position: absolute;
    background: currentColor;
    transition: transform 0.25s ease, opacity 0.25s ease;
}

.faq-item__icon::before {
    width: 100%;
    height: 1.5px;
    top: 50%;
    left: 0;
    transform: translateY(-50%);
}

.faq-item__icon::after {
    width: 1.5px;
    height: 100%;
    left: 50%;
    top: 0;
    transform: translateX(-50%);
}

.faq-item.is-active .faq-item__icon::after {
    transform: translateX(-50%) rotate(90deg);
    opacity: 0;
}

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

.faq-item.is-active .faq-item__answer {
    max-height: 400px;
    padding-bottom: var(--space-md);
}

.faq-item__answer p {
    font-size: 0.85rem;
    color: var(--color-text-light);
    line-height: 1.75;
}

/* ============================================
   Conclusion Box
   ============================================ */
.conclusion-box {
    text-align: center;
    padding: var(--space-xl);
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: 2px;
    margin: var(--space-xl) 0;
}

.conclusion-box__quote {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-style: italic;
    line-height: 1.6;
    max-width: 550px;
    margin: 0 auto var(--space-md);
    color: var(--color-text);
}

.conclusion-box__author {
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--color-text-light);
}

/* ============================================
   CTA Section - Smaller Button
   ============================================ */
.cta-section {
    text-align: center;
    padding: var(--space-2xl) var(--space-lg);
    background: var(--color-primary);
    margin: var(--space-2xl) 0;
}

.cta-section__title {
    color: var(--color-white);
    font-size: 1.125rem;
    margin-bottom: var(--space-sm);
}

.cta-section__text {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.65);
    max-width: 380px;
    margin: 0 auto var(--space-md);
}

.cta-button {
    display: inline-block;
    padding: 0.625rem 1.5rem;
    background: var(--color-accent);
    color: var(--color-white);
    font-size: 0.65rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    text-decoration: none;
    border: none;
    border-radius: 2px;
    transition: background 0.2s ease, transform 0.2s ease;
    white-space: nowrap;
    text-align: center;
}

.cta-button:hover {
    background: var(--color-accent-light);
    color: var(--color-white);
    transform: translateY(-1px);
}

/* Final CTA */
.final-cta {
    text-align: center;
    padding: var(--space-2xl) var(--space-lg);
    margin: var(--space-xl) 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.final-cta__image {
    max-width: 200px;
    margin: 0 auto var(--space-lg);
}

.final-cta__image img {
    width: 100%;
    border-radius: 2px;
    border: 1px solid var(--color-border);
}

.final-cta__name {
    font-family: var(--font-display);
    font-size: 1.25rem;
    margin-bottom: var(--space-xs);
}

.final-cta__tagline {
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-style: italic;
    color: var(--color-text-light);
    margin-bottom: var(--space-lg);
}

.final-cta__text {
    font-size: 0.85rem;
    color: var(--color-text-light);
    max-width: 400px;
    margin: 0 auto var(--space-md);
}

/* ============================================
   Legal Modal Styles
   ============================================ */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
}

.modal.is-active {
    display: flex;
}

.modal__content {
    background: var(--color-white);
    max-width: 700px;
    width: 100%;
    max-height: 80vh;
    overflow-y: auto;
    border-radius: 4px;
    padding: var(--space-2xl);
    position: relative;
}

.modal__close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    width: 32px;
    height: 32px;
    border: none;
    background: none;
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--color-text-light);
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal__close:hover {
    color: var(--color-primary);
}

.modal__title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--color-border);
}

.modal__text {
    font-size: 0.9rem;
    line-height: 1.8;
    color: var(--color-text);
}

.modal__text h4 {
    font-size: 0.95rem;
    margin-top: var(--space-lg);
    margin-bottom: var(--space-sm);
}

.modal__text p {
    margin-bottom: var(--space-md);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    padding: var(--space-2xl) var(--space-lg);
    background: var(--color-primary);
    text-align: center;
}

.footer__brand {
    font-family: var(--font-display);
    font-size: 0.85rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-white);
    margin-bottom: var(--space-sm);
}

.footer__text {
    font-size: 0.7rem;
    color: rgba(255,255,255,0.45);
    margin-bottom: var(--space-xs);
}

.footer__link {
    color: rgba(255,255,255,0.6);
}

.footer__link:hover {
    color: var(--color-white);
}

/* Footer Legal Links */
.footer__legal {
    margin-top: var(--space-lg);
    padding-top: var(--space-lg);
    border-top: 1px solid rgba(255,255,255,0.1);
}

.footer__legal-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-md) var(--space-lg);
    margin-bottom: var(--space-lg);
}

.footer__legal-link {
    font-size: 0.75rem;
    color: rgba(255,255,255,0.6);
    cursor: pointer;
    transition: color 0.2s ease;
}

.footer__legal-link:hover {
    color: var(--color-white);
}

/* ============================================
   Animations
   ============================================ */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

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

/* ============================================
   Back to Top
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--color-accent);
    color: var(--color-white);
    border: none;
    cursor: pointer;
    font-size: 1rem;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
    z-index: 99;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 3px 15px rgba(92, 124, 74, 0.25);
}

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

.back-to-top:hover {
    transform: translateY(-2px);
}

/* ============================================
   Reading Progress
   ============================================ */
.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: transparent;
    z-index: 101;
}

.reading-progress__bar {
    height: 100%;
    background: var(--color-accent);
    width: 0%;
    transition: width 0.1s linear;
}

/* ============================================
   RESPONSIVE - Tablet (768px)
   ============================================ */
@media (max-width: 768px) {
    .hero__meta {
        gap: var(--space-sm);
    }
    
    .hero__meta-item::after {
        display: none;
    }
    
    .product-card {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    .product-card__image {
        max-width: 280px;
        margin: 0 auto;
    }
    
    .feature-list {
        grid-template-columns: 1fr;
    }
    
    .usage-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .testimonial-grid {
        grid-template-columns: 1fr;
    }
    
    .pros-cons {
        grid-template-columns: 1fr;
    }
    
    .expert-card {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .expert-card__avatar {
        margin: 0 auto;
    }
    
    .image-grid--3 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .pullquote {
        margin: var(--space-2xl) 0;
    }
    
    .footer__legal-links {
        flex-direction: column;
        gap: var(--space-sm);
    }
}

/* ============================================
   RESPONSIVE - Mobile (480px)
   ============================================ */
@media (max-width: 480px) {
    html {
        font-size: 15px;
    }
    
    .container {
        padding: 0 var(--space-md);
    }
    
    .hero {
        padding-top: calc(4rem + 1.5rem);
    }
    
    .featured-image {
        padding: 0;
    }
    
    .featured-image img {
        aspect-ratio: 4/3;
        border-radius: 0;
    }
    
    .article {
        padding: 0;
    }
    
    .stats-row {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .usage-grid {
        grid-template-columns: 1fr;
    }
    
    .image-grid {
        grid-template-columns: 1fr;
    }
    
    .image-grid--3 {
        grid-template-columns: 1fr;
    }
    
    .modal__content {
        padding: var(--space-lg);
    }
}

/* ============================================
   RESPONSIVE - Large Desktop (1200px+)
   ============================================ */
@media (min-width: 1200px) {
    .container {
        padding: 0 var(--space-xl);
    }
    
    .article {
        font-size: 1.0625rem;
    }
    
    .article__lead {
        font-size: 1.125rem;
    }
}