/* ==========================================================================
   CSS VARIABLES - EXTENSIVE RED PALETTE & DESIGN TOKENS
   ========================================================================== */
   :root {
    /* Main Color Palette (Reds from prompt context) */
    --clr-red-50: #fef2f2;
    --clr-red-100: #fee2e2;
    --clr-red-200: #fecaca;
    --clr-red-300: #fca5a5;
    --clr-red-400: #f87171;
    --clr-red-500: #ef4444;
    --clr-red-600: #dc2626;
    --clr-red-700: #b91c1c;
    --clr-red-800: #991b1b;
    --clr-red-900: #7f1d1d;
    --clr-red-950: #450a0a;
    
    /* Neutrals & Grays for contrast */
    --clr-white: #ffffff;
    --clr-gray-50: #f8fafc;
    --clr-gray-100: #f1f5f9;
    --clr-gray-200: #e2e8f0;
    --clr-gray-300: #cbd5e1;
    --clr-gray-400: #94a3b8;
    --clr-gray-500: #64748b;
    --clr-gray-600: #475569;
    --clr-gray-700: #334155;
    --clr-gray-800: #1e293b;
    --clr-gray-900: #0f172a;
    
    /* Accent / Rating Colors */
    --clr-star-active: #f59e0b; /* Amber for Amazon stars */
    --clr-verified: #059669; /* Soft green for verified text */

    /* Semantic Tokens */
    --bg-main: var(--clr-red-50);
    --bg-card: var(--clr-white);
    --text-main: var(--clr-gray-800);
    --text-muted: var(--clr-gray-500);
    --text-heading: var(--clr-red-950);
    --border-soft: var(--clr-red-200);
    --accent-primary: var(--clr-red-600);
    --accent-hover: var(--clr-red-700);

    /* Layered Shadows (Deep, soft, premium feel) */
    --shadow-sm: 0 1px 2px 0 rgba(153, 27, 27, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(153, 27, 27, 0.08), 0 2px 4px -1px rgba(153, 27, 27, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(153, 27, 27, 0.08), 0 4px 6px -2px rgba(153, 27, 27, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(153, 27, 27, 0.08), 0 10px 10px -5px rgba(153, 27, 27, 0.03);
    --shadow-glow: 0 0 20px rgba(220, 38, 38, 0.15);
    --shadow-glow-active: 0 0 30px rgba(220, 38, 38, 0.3);
    --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.03);

    /* Gradients */
    --grad-primary: linear-gradient(135deg, var(--clr-red-500) 0%, var(--clr-red-700) 100%);
    --grad-hover: linear-gradient(135deg, var(--clr-red-600) 0%, var(--clr-red-800) 100%);
    --grad-card-border: linear-gradient(180deg, var(--clr-red-200) 0%, var(--clr-white) 100%);
    --grad-ambient: radial-gradient(circle at top right, var(--clr-red-100) 0%, transparent 60%);

    /* Radii */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-3xl: 2.5rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 400ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ==========================================================================
   RESET & GLOBAL STYLES
   ========================================================================== */
html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    overflow-x: hidden;
    scroll-behavior: smooth;
}

body.page-body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

::selection {
    background-color: var(--clr-red-200);
    color: var(--clr-red-950);
}

/* Custom Scrollbar for a premium feel */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--clr-red-50);
}
::-webkit-scrollbar-thumb {
    background: var(--clr-red-300);
    border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--clr-red-400);
}

/* ==========================================================================
   ANIMATIONS (KEYFRAMES)
   ========================================================================== */
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

@keyframes pulse-glow {
    0% { box-shadow: 0 0 0 0 rgba(220, 38, 38, 0.4); }
    70% { box-shadow: 0 0 0 15px rgba(220, 38, 38, 0); }
    100% { box-shadow: 0 0 0 0 rgba(220, 38, 38, 0); }
}

@keyframes shine {
    0% { left: -100%; opacity: 0; }
    20% { left: 100%; opacity: 0.6; }
    100% { left: 100%; opacity: 0; }
}

@keyframes fade-in-up {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes blob-move {
    0% { transform: scale(1) translate(0, 0); }
    33% { transform: scale(1.1) translate(30px, -50px); }
    66% { transform: scale(0.9) translate(-20px, 20px); }
    100% { transform: scale(1) translate(0, 0); }
}

@keyframes check-appear {
    0% { transform: scale(0); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}

/* ==========================================================================
   AMBIENT DECORATIVE BACKGROUNDS (CSS-Only Visuals)
   ========================================================================== */
.ambient-background {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
    background: var(--bg-main);
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: blob-move 15s infinite alternate ease-in-out;
}

.blob-1 {
    top: -10%; left: -10%;
    width: 50vw; height: 50vw;
    background: radial-gradient(circle, var(--clr-red-200), transparent 70%);
}

.blob-2 {
    bottom: -20%; right: -10%;
    width: 60vw; height: 60vw;
    background: radial-gradient(circle, var(--clr-red-100), transparent 70%);
    animation-delay: -5s;
}

.blob-3 {
    top: 40%; left: 30%;
    width: 40vw; height: 40vw;
    background: radial-gradient(circle, var(--clr-white), transparent 60%);
    animation-duration: 20s;
}

/* ==========================================================================
   HEADER
   ========================================================================== */
.site-header {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid rgba(254, 226, 226, 0.5); /* red-100 */
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.header-container {
    height: 4.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.header-content {
    display: flex;
    align-items: center;
    gap: 1rem;
    position: relative;
    width: 100%;
    justify-content: center;
}

.header-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--clr-red-900);
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 70%;
    letter-spacing: -0.01em;
}

.header-badge-decorative {
    background: var(--clr-red-100);
    color: var(--clr-red-800);
    font-size: 0.65rem;
    text-transform: uppercase;
    font-weight: 800;
    letter-spacing: 0.1em;
    padding: 0.25rem 0.6rem;
    border-radius: var(--radius-full);
    border: 1px solid var(--clr-red-200);
    display: none; /* hidden on small screens */
}

.header-progress-line {
    height: 2px;
    width: 100%;
    background: linear-gradient(90deg, var(--clr-red-200), var(--clr-red-500), var(--clr-red-200));
    opacity: 0.3;
}

/* ==========================================================================
   HERO / MAIN PRODUCT CARD SECTION
   ========================================================================== */
.site-main {
    flex: 1 0 auto;
    padding-top: 3rem;
    padding-bottom: 3rem;
}

.hero-section {
    position: relative;
    z-index: 10;
    animation: fade-in-up 0.8s ease-out forwards;
}

.product-card-wrapper {
    background: var(--bg-card);
    border-radius: var(--radius-3xl);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
    position: relative;
    padding: 2px; /* For gradient border effect */
    background: linear-gradient(145deg, #ffffff, var(--clr-red-50));
    overflow: hidden;
}

.product-card-wrapper::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    border-radius: var(--radius-3xl);
    padding: 1px; /* border thickness */
    background: var(--grad-card-border);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}

.product-card-inner {
    background: var(--clr-white);
    border-radius: calc(var(--radius-3xl) - 2px);
    padding: 2rem;
    position: relative;
    z-index: 2;
}

/* ==========================================================================
   CSS-ONLY GALLERY (The Magic)
   ========================================================================== */
.gallery-column {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.gallery-component {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    position: relative;
}

.gallery-viewport {
    position: relative;
    width: 100%;
    aspect-ratio: 1 / 1;
    border-radius: var(--radius-2xl);
    overflow: hidden;
    background: var(--clr-gray-50);
    box-shadow: var(--shadow-inner);
    border: 1px solid var(--clr-red-100);
}

.gallery-slide {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    opacity: 0;
    visibility: hidden;
    transform: scale(0.95);
    transition: opacity var(--transition-slow), transform var(--transition-slow), visibility var(--transition-slow);
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.image-frame {
    width: 100%;
    height: 100%;
    padding: 1rem; /* safe area inside viewport */
    display: flex;
    align-items: center;
    justify-content: center;
}

.image-frame img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    filter: drop-shadow(0 10px 15px rgba(0,0,0,0.05));
}

/* Decorative corners in viewport */
.viewport-corner {
    position: absolute;
    width: 30px; height: 30px;
    border: 2px solid var(--clr-red-200);
    z-index: 5;
    pointer-events: none;
    opacity: 0.5;
    border-radius: 4px;
}
.viewport-corner.top-left {
    top: 1rem; left: 1rem;
    border-right: none; border-bottom: none;
}
.viewport-corner.bottom-right {
    bottom: 1rem; right: 1rem;
    border-left: none; border-top: none;
}

/* Thumbnails Setup */
.gallery-thumbnails {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.75rem;
}

.thumbnail-item {
    cursor: pointer;
    position: relative;
    aspect-ratio: 1 / 1;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--clr-white);
    border: 2px solid transparent;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.thumbnail-item::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255,255,255,0.4);
    transition: background var(--transition-fast);
}

.thumbnail-item:hover::after {
    background: rgba(255,255,255,0);
}

.thumbnail-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--clr-red-200);
}

.thumbnail-inner {
    width: 100%; height: 100%;
    padding: 0.5rem;
}

.thumbnail-inner img {
    width: 100%; height: 100%;
    object-fit: cover;
    border-radius: var(--radius-sm);
}

/* Gallery Logic (No JS) */
#gallery-img-1:checked ~ .gallery-viewport .slide-1,
#gallery-img-2:checked ~ .gallery-viewport .slide-2,
#gallery-img-3:checked ~ .gallery-viewport .slide-3,
#gallery-img-4:checked ~ .gallery-viewport .slide-4 {
    opacity: 1;
    visibility: visible;
    transform: scale(1);
    z-index: 10;
}

/* Active Thumbnail Styling */
#gallery-img-1:checked ~ .gallery-thumbnails [for="gallery-img-1"],
#gallery-img-2:checked ~ .gallery-thumbnails [for="gallery-img-2"],
#gallery-img-3:checked ~ .gallery-thumbnails [for="gallery-img-3"],
#gallery-img-4:checked ~ .gallery-thumbnails [for="gallery-img-4"] {
    border-color: var(--clr-red-500);
    box-shadow: 0 0 0 2px var(--clr-red-100), var(--shadow-md);
}

#gallery-img-1:checked ~ .gallery-thumbnails [for="gallery-img-1"]::after,
#gallery-img-2:checked ~ .gallery-thumbnails [for="gallery-img-2"]::after,
#gallery-img-3:checked ~ .gallery-thumbnails [for="gallery-img-3"]::after,
#gallery-img-4:checked ~ .gallery-thumbnails [for="gallery-img-4"]::after {
    background: transparent;
}


/* ==========================================================================
   PRODUCT INFORMATION (RIGHT COLUMN)
   ========================================================================== */
.product-info-column {
    display: flex;
    flex-direction: column;
}

.product-info-wrapper {
    position: relative;
    padding: 1rem 0;
}

/* Safe Health Badge */
.safe-health-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--clr-red-50);
    border: 1px solid var(--clr-red-200);
    color: var(--clr-red-800);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-normal);
}
.safe-health-badge:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}
.pulse-dot {
    width: 8px; height: 8px;
    background-color: var(--clr-red-500);
    border-radius: 50%;
    position: relative;
}
.pulse-dot::after {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    border: 2px solid var(--clr-red-300);
    animation: pulse-glow 2s infinite;
}

/* Title Styling */
.product-main-title {
    font-size: 2rem;
    line-height: 1.2;
    font-weight: 800;
    color: var(--text-heading);
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.title-highlight {
    color: var(--clr-red-600);
    position: relative;
    display: inline-block;
}
.title-highlight::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 0; width: 100%; height: 6px;
    background: var(--clr-red-200);
    opacity: 0.5;
    z-index: -1;
    transform: rotate(-1deg);
}

.product-divider {
    height: 1px;
    background: linear-gradient(90deg, var(--clr-red-100), transparent);
    margin: 2rem 0;
}

/* Description Details */
.product-description-label {
    font-size: 0.875rem;
    text-transform: uppercase;
    font-weight: 700;
    color: var(--clr-red-700);
    letter-spacing: 0.05em;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.product-description-label::before {
    content: '';
    display: block;
    width: 20px; height: 2px;
    background: var(--clr-red-400);
}

/* Features List visually distinct */
.product-features-list {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem;
    border-radius: var(--radius-lg);
    background: var(--clr-white);
    border: 1px solid transparent;
    transition: all var(--transition-normal);
}

.feature-item:hover {
    background: var(--clr-red-50);
    border-color: var(--clr-red-100);
    transform: translateX(5px);
    box-shadow: var(--shadow-sm);
}

.feature-icon-wrapper {
    flex-shrink: 0;
    width: 24px; height: 24px;
    border-radius: 50%;
    background: var(--clr-red-100);
    position: relative;
    margin-top: 2px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* CSS Drawn Checkmark */
.feature-icon-wrapper::after {
    content: '';
    width: 6px; height: 10px;
    border-right: 2px solid var(--clr-red-600);
    border-bottom: 2px solid var(--clr-red-600);
    transform: rotate(45deg) translate(-1px, -1px);
    opacity: 0;
    animation: check-appear 0.4s 0.2s forwards;
}

.feature-text-content {
    font-size: 0.95rem;
    color: var(--clr-gray-700);
    line-height: 1.6;
}
.feature-text-content strong {
    color: var(--clr-gray-900);
    font-weight: 700;
    display: block;
    margin-bottom: 0.25rem;
}


/* ==========================================================================
   CTA SECTION
   ========================================================================== */
.cta-section {
    padding: 6rem 0;
    position: relative;
    overflow: hidden;
}

.cta-background-elements {
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cta-circle-1, .cta-circle-2 {
    position: absolute;
    border-radius: 50%;
    border: 1px solid var(--clr-red-200);
    animation: pulse-glow 3s infinite alternate;
}
.cta-circle-1 {
    width: 400px; height: 400px;
    background: radial-gradient(circle, var(--clr-red-50), transparent 70%);
}
.cta-circle-2 {
    width: 600px; height: 600px;
    border-color: var(--clr-red-100);
    animation-delay: 1s;
}

.cta-content-wrapper {
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(20px);
    border: 1px solid var(--clr-red-100);
    padding: 3rem 2rem;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
}

.cta-heading {
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--text-heading);
    margin-bottom: 1rem;
}

.cta-subtext {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
}

.cta-button-container {
    display: flex;
    justify-content: center;
}

.btn-amazon-primary {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1.25rem 3rem;
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--clr-white);
    background: var(--grad-primary);
    border-radius: var(--radius-xl);
    text-decoration: none;
    overflow: hidden;
    transition: all var(--transition-bounce);
    box-shadow: 0 10px 20px -5px rgba(220, 38, 38, 0.4), inset 0 -3px 0 rgba(0,0,0,0.1);
    transform-origin: center;
}

.btn-amazon-primary:hover,
.btn-amazon-primary:focus-visible {
    background: var(--grad-hover);
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 15px 25px -5px rgba(220, 38, 38, 0.5), inset 0 -3px 0 rgba(0,0,0,0.2);
    outline: none;
}

.btn-amazon-primary:active {
    transform: translateY(1px);
    box-shadow: 0 5px 10px -2px rgba(220, 38, 38, 0.4), inset 0 2px 0 rgba(0,0,0,0.1);
}

.btn-shine {
    position: absolute;
    top: 0; left: -100%;
    width: 50%; height: 100%;
    background: linear-gradient(to right, rgba(255,255,255,0) 0%, rgba(255,255,255,0.3) 50%, rgba(255,255,255,0) 100%);
    transform: skewX(-20deg);
    animation: shine 4s infinite;
}


/* ==========================================================================
   REVIEWS SECTION (Amazon style but polished)
   ========================================================================== */
.reviews-section {
    padding: 2rem 0 6rem;
}

.reviews-header {
    text-align: center;
    margin-bottom: 3rem;
}

.reviews-main-title {
    font-size: 2rem;
    font-weight: 800;
    color: var(--clr-gray-900);
}

.reviews-decorative-line {
    width: 60px; height: 4px;
    background: var(--clr-red-500);
    margin: 1rem auto 0;
    border-radius: var(--radius-full);
}

.reviews-list {
    display: flex;
    flex-direction: column;
    gap: 2rem; /* Strict vertical layout as requested */
}

/* Individual Review Card */
.review-card {
    background: var(--clr-white);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--clr-red-50);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    overflow: hidden;
    position: relative;
}

.review-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--clr-red-100);
}

.review-card::before {
    content: '';
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 4px;
    background: var(--clr-red-300);
    opacity: 0;
    transition: opacity var(--transition-normal);
}
.review-card:hover::before {
    opacity: 1;
}

.review-card-inner {
    padding: 2rem;
}

/* Avatar Row */
.review-top-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.review-avatar {
    width: 50px; height: 50px;
    border-radius: 50%;
    overflow: hidden;
    border: 2px solid var(--clr-red-100);
    box-shadow: var(--shadow-sm);
    flex-shrink: 0;
}
.review-avatar img {
    width: 100%; height: 100%;
    object-fit: cover;
}

.review-user-info {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.review-author-name {
    font-weight: 700;
    color: var(--clr-gray-900);
    font-size: 1rem;
}

.review-rating-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.review-stars {
    color: var(--clr-star-active);
    font-size: 1.1rem;
    letter-spacing: 2px;
}

.review-headline {
    font-weight: 700;
    color: var(--clr-gray-800);
    font-size: 0.95rem;
}

/* Meta Data */
.review-meta-row {
    margin-bottom: 0.75rem;
}

.review-date-country {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.review-attributes-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 1.25rem;
}

.review-verified-badge {
    color: var(--clr-verified);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}
.review-verified-badge::before {
    content: '✔';
    font-size: 0.8rem;
}

.review-specs {
    font-size: 0.8rem;
    color: var(--clr-gray-600);
    border-left: 1px solid var(--clr-gray-300);
    padding-left: 0.75rem;
}

/* Body Text */
.review-body-text {
    font-size: 1rem;
    color: var(--clr-gray-800);
    line-height: 1.6;
}

/* Attached Photo inside review */
.review-attached-media {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px dashed var(--clr-gray-200);
}

.review-photo-wrapper {
    width: 120px; height: 120px;
    border-radius: var(--radius-md);
    overflow: hidden;
    position: relative;
    border: 1px solid var(--clr-gray-200);
    cursor: pointer;
}
.review-photo-wrapper img {
    width: 100%; height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}
.review-photo-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0);
    transition: background var(--transition-normal);
}
.review-photo-wrapper:hover img {
    transform: scale(1.05);
}
.review-photo-wrapper:hover .review-photo-overlay {
    background: rgba(0,0,0,0.1);
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
    background: var(--clr-white);
    border-top: 1px solid var(--clr-red-100);
    position: relative;
}

.footer-decorative-top {
    position: absolute;
    top: -2px; left: 0; right: 0;
    height: 4px;
    background: linear-gradient(90deg, transparent, var(--clr-red-300), transparent);
    opacity: 0.5;
}

.footer-content-wrapper {
    padding: 4rem 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.footer-brand .footer-title {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--clr-gray-400);
    letter-spacing: -0.02em;
}

.footer-nav {
    display: flex;
    flex-direction: column; /* Mobile first vertical */
    align-items: center;
    gap: 1rem;
}

.footer-link {
    color: var(--clr-gray-500);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}
.footer-link::after {
    content: '';
    position: absolute;
    bottom: -2px; left: 0; right: 0;
    height: 1px;
    background: var(--clr-red-400);
    transform: scaleX(0);
    transition: transform var(--transition-fast);
}
.footer-link:hover {
    color: var(--clr-red-600);
}
.footer-link:hover::after {
    transform: scaleX(1);
}

.footer-separator {
    width: 4px; height: 4px;
    background: var(--clr-gray-300);
    border-radius: 50%;
}

.footer-copyright {
    margin-top: 1rem;
    font-size: 0.85rem;
    color: var(--clr-gray-400);
    text-align: center;
}

/* ==========================================================================
   MEDIA QUERIES (RESPONSIVE ADAPTATION)
   ========================================================================== */

/* 320px - Extra Small (Pre-defined in structural setup mostly, fine tuning here) */
@media (max-width: 374px) {
    .product-card-inner { padding: 1.25rem; }
    .product-main-title { font-size: 1.5rem; }
    .cta-heading { font-size: 1.75rem; }
    .review-card-inner { padding: 1.25rem; }
    .btn-amazon-primary { padding: 1rem 1.5rem; width: 100%; }
}

/* 375px - 767px (Mobile) */
@media (max-width: 767px) {
    .header-title { display: none; }
    .header-badge-decorative { display: block; margin: 0 auto; }
    
    .gallery-column {
        flex-direction: column-reverse; /* Thumbnails under image on mobile */
    }
    .gallery-thumbnails {
        grid-template-columns: repeat(4, 1fr);
        gap: 0.5rem;
    }
    .gallery-viewport {
        border-radius: var(--radius-xl);
    }
    
    .cta-content-wrapper { padding: 2rem 1rem; }
    
    .review-attributes-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.25rem;
    }
    .review-specs {
        border-left: none;
        padding-left: 0;
    }
}

/* 768px - Tablet */
@media (min-width: 768px) {
    .header-badge-decorative { display: block; }
    .product-main-title { font-size: 2.25rem; }
    
    .gallery-column {
        flex-direction: row; /* Thumbnails on the side */
        align-items: flex-start;
    }
    .gallery-thumbnails {
        display: flex;
        flex-direction: column;
        width: 80px;
        flex-shrink: 0;
    }
    .gallery-viewport {
        flex-grow: 1;
    }

    .footer-nav {
        flex-direction: row;
    }
}

/* 1024px - Desktop (Layout governed by Tailwind Grid, but adding hover polish) */
@media (min-width: 1024px) {
    .product-card-inner {
        padding: 3rem;
    }
    .gallery-thumbnails {
        width: 100px; /* Slightly larger on desktop */
    }
}

/* Reduced Motion Preference */
@media (prefers-reduced-motion: reduce) {
    *, ::before, ::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}
.gallery-viewport {
    width: 100%;
    aspect-ratio: 1 / 1;
    min-height: 320px;
}

@media (max-width: 480px) {
    .gallery-viewport {
        min-height: 280px;
    }
}