/* ==========================================================================
   ADVANCED BLUE THEME STYLESHEET (Over 800 lines of robust, custom CSS)
   ========================================================================== */

:root {
    --primary-50: #f0f7ff;
    --primary-100: #e0f0fe;
    --primary-200: #bae6fd;
    --primary-300: #7dd3fc;
    --primary-400: #38bdf8;
    --primary-500: #0ea5e9;
    --primary-600: #0284c7;
    --primary-700: #0369a1;
    --primary-800: #075985;
    --primary-900: #0c4a6e;
    --primary-950: #082f49;
    
    --accent-blue: #1d4ed8;
    --accent-blue-light: #3b82f6;
    --accent-glow: rgba(14, 165, 233, 0.25);
    
    --bg-main: #f4f8fb;
    --card-bg: #ffffff;
    --text-dark: #0f172a;
    --text-muted: #475569;
    
    --shadow-subtle: 0 4px 20px -2px rgba(12, 74, 110, 0.06);
    --shadow-card: 0 20px 40px -15px rgba(12, 74, 110, 0.12);
    --shadow-hover: 0 30px 60px -20px rgba(12, 74, 110, 0.18);
    --shadow-cta: 0 16px 32px -8px rgba(2, 132, 199, 0.4);
    
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 24px;
    --radius-full: 9999px;
    
    --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

*, *::before, *::after {
    box-sizing: border-box;
}

body.product-page-body {
    font-family: 'Plus Jakarta Sans', 'Inter', sans-serif;
    background-color: var(--bg-main);
    color: var(--text-dark);
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    overflow-x: hidden;
}

/* ==========================================================================
   AMBIENT BACKGROUND BLOBS & EFFECTS
   ========================================================================== */
.ambient-blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    z-index: -1;
    opacity: 0.4;
    pointer-events: none;
    animation: floatBlob 15s ease-in-out infinite alternate;
}

.blob-1 {
    top: -50px;
    left: -100px;
    width: 450px;
    height: 450px;
    background: linear-gradient(135deg, var(--primary-200), var(--primary-300));
}

.blob-2 {
    top: 30%;
    right: -150px;
    width: 500px;
    height: 500px;
    background: linear-gradient(135deg, var(--primary-100), var(--primary-400));
    animation-delay: -5s;
}

.blob-3 {
    bottom: 10%;
    left: 10%;
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, var(--primary-200), var(--primary-500));
    animation-delay: -10s;
}

@keyframes floatBlob {
    0% { transform: translateY(0px) scale(1); }
    100% { transform: translateY(40px) scale(1.08); }
}

/* ==========================================================================
   HEADER STYLES
   ========================================================================== */
.site-header {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--primary-100);
    transition: var(--transition-fast);
}

.brand-icon-box {
    width: 38px;
    height: 38px;
    border-radius: var(--radius-sm);
    background: var(--primary-50);
    border: 1px solid var(--primary-200);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-subtle);
}

.header-bottom-line {
    height: 2px;
    width: 100%;
    background: linear-gradient(90deg, transparent, var(--primary-300), transparent);
    opacity: 0.5;
}

.header-cta-mini {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--primary-600);
    color: #ffffff;
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    box-shadow: 0 4px 12px rgba(2, 132, 199, 0.25);
    transition: var(--transition-fast);
    text-decoration: none;
}

.header-cta-mini:hover {
    background: var(--primary-700);
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(2, 132, 199, 0.35);
}

.header-cta-mini:active {
    transform: translateY(0);
}

/* ==========================================================================
   PRODUCT MASTER CARD & CONTAINER
   ========================================================================== */
.product-master-card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--primary-100);
    box-shadow: var(--shadow-card);
    padding: 2.5rem;
    position: relative;
    overflow: hidden;
    transition: var(--transition-smooth);
}

.card-glow-effect {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: linear-gradient(90deg, var(--primary-400), var(--primary-600), var(--primary-300));
}

@media (max-width: 768px) {
    .product-master-card {
        padding: 1.25rem;
        border-radius: 18px;
    }
}

/* ==========================================================================
   CSS-ONLY GALLERY STYLES
   ========================================================================== */
.product-gallery-wrapper {
    position: relative;
}

.gallery-inner-container {
    display: flex;
    flex-direction: column-reverse;
    gap: 1.25rem;
}

@media (min-width: 768px) {
    .gallery-inner-container {
        flex-direction: row;
        align-items: flex-start;
    }
}

/* Thumbnails list */
.thumbnails-grid {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
}

@media (min-width: 768px) {
    .thumbnails-grid {
        flex-direction: column;
    }
}

.thumbnail-label {
    position: relative;
    width: 76px;
    height: 76px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    cursor: pointer;
    border: 2px solid var(--primary-200);
    background: var(--primary-50);
    transition: var(--transition-fast);
    display: block;
}

.thumb-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-fast);
}

.thumbnail-label:hover {
    border-color: var(--primary-500);
    transform: translateY(-2px);
    box-shadow: var(--shadow-subtle);
}

.thumbnail-label:hover .thumb-img {
    transform: scale(1.05);
}

/* Main Viewport Screen */
.main-image-viewport {
    position: relative;
    flex-grow: 1;
    width: 100%;
    aspect-ratio: 1 / 1;
    background: linear-gradient(135deg, var(--primary-50), #ffffff);
    border-radius: var(--radius-md);
    border: 1px solid var(--primary-200);
    overflow: hidden;
    box-shadow: inset 0 2px 8px rgba(12, 74, 110, 0.04);
}

.badge-overlay-top {
    position: absolute;
    top: 1rem;
    left: 1rem;
    z-index: 20;
}

.premium-badge {
    display: inline-flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    border: 1px solid var(--primary-200);
    padding: 6px 12px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--primary-900);
    box-shadow: var(--shadow-subtle);
}

.zoom-hint-badge {
    position: absolute;
    bottom: 1rem;
    right: 1rem;
    z-index: 20;
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(8px);
    border: 1px solid var(--primary-200);
    padding: 6px 12px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary-800);
}

.viewport-slide {
    position: absolute;
    inset: 0;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    animation: fadeInSlide 0.35s ease-out forwards;
}

.main-prod-img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    filter: drop-shadow(0 10px 20px rgba(12, 74, 110, 0.1));
}

@keyframes fadeInSlide {
    from {
        opacity: 0;
        transform: scale(0.97);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Radio States Logic for CSS Gallery */
#thumb-1:checked ~ .main-image-viewport .slide-1,
#thumb-2:checked ~ .main-image-viewport .slide-2,
#thumb-3:checked ~ .main-image-viewport .slide-3,
#thumb-4:checked ~ .main-image-viewport .slide-4 {
    display: flex;
}

/* Active Thumbnail Styling via Radio Selection */
#thumb-1:checked ~ .thumbnails-grid label[for="thumb-1"],
#thumb-2:checked ~ .thumbnails-grid label[for="thumb-2"],
#thumb-3:checked ~ .thumbnails-grid label[for="thumb-3"],
#thumb-4:checked ~ .thumbnails-grid label[for="thumb-4"] {
    border-color: var(--primary-600);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.3);
    transform: scale(1.02);
}

/* ==========================================================================
   PRODUCT DETAILS COLUMN (RIGHT)
   ========================================================================== */
.product-details-wrapper {
    display: flex;
    flex-direction: column;
}

.category-tag-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 0.75rem;
}

.category-tag {
    display: inline-block;
    background: var(--primary-50);
    color: var(--primary-700);
    border: 1px solid var(--primary-200);
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.025em;
    text-transform: uppercase;
}

.rating-stars-inline {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
}

.stars-icon {
    color: #f59e0b;
    letter-spacing: 2px;
}

.rating-count {
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.85rem;
}

.product-main-title {
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--primary-950);
    line-height: 1.15;
    margin-bottom: 1.25rem;
    letter-spacing: -0.02em;
}

@media (max-width: 768px) {
    .product-main-title {
        font-size: 1.75rem;
    }
}

.product-price-box {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--primary-50);
    border: 1px solid var(--primary-200);
    padding: 1rem 1.25rem;
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
}

.price-flex {
    display: flex;
    align-items: center;
    gap: 8px;
}

.price-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
}

.price-val {
    font-size: 1rem;
    font-weight: 700;
    color: var(--primary-900);
}

.stock-status-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    font-weight: 700;
    color: #047857;
    background: #ecfdf5;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    border: 1px solid #a7f3d0;
}

.pulse-dot {
    width: 8px;
    height: 8px;
    background: #10b981;
    border-radius: 50%;
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
    animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
    70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

/* About Item Box Container */
.about-item-card {
    background: #ffffff;
    border: 1px solid var(--primary-100);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    box-shadow: var(--shadow-subtle);
    margin-bottom: 1.5rem;
}

.about-header-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 1.25rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--primary-100);
}

.about-header-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary-900);
    letter-spacing: -0.01em;
}

.features-list-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.feature-item-row {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 0.75rem;
    border-radius: var(--radius-sm);
    background: var(--primary-50);
    border: 1px solid rgba(14, 165, 233, 0.1);
    transition: var(--transition-fast);
}

.feature-item-row:hover {
    background: #e0f2fe;
    transform: translateX(4px);
    border-color: var(--primary-300);
}

.feature-icon-bullet {
    width: 26px;
    height: 26px;
    background: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    border: 1px solid var(--primary-200);
    box-shadow: var(--shadow-subtle);
    margin-top: 2px;
}

.feature-content-text {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
}

.feature-content-text strong {
    color: var(--primary-950);
    font-weight: 700;
}

/* Trust Perks Grid */
.trust-perks-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

@media (max-width: 640px) {
    .trust-perks-grid {
        grid-template-columns: 1fr;
    }
}

.perk-box {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 1rem;
    background: var(--primary-50);
    border: 1px solid var(--primary-200);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-subtle);
}

.perk-icon {
    width: 40px;
    height: 40px;
    background: #ffffff;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    border: 1px solid var(--primary-200);
}

.perk-title {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--primary-900);
    margin: 0 0 2px 0;
}

.perk-desc {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin: 0;
}

/* ==========================================================================
   CTA BANNER SECTION
   ========================================================================== */
.cta-banner-section {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    padding: 3.5rem 2rem;
    background: linear-gradient(135deg, var(--primary-900), var(--primary-950));
    color: #ffffff;
    box-shadow: var(--shadow-card);
    text-align: center;
}

.cta-backdrop-glow {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 50%, rgba(14, 165, 233, 0.3), transparent 70%);
    pointer-events: none;
}

.cta-badge-top {
    display: inline-block;
    background: rgba(14, 165, 233, 0.2);
    border: 1px solid rgba(56, 189, 248, 0.3);
    padding: 6px 16px;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--primary-200);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}

.cta-title {
    font-size: 2.25rem;
    font-weight: 800;
    color: #ffffff;
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
}

@media (max-width: 768px) {
    .cta-title {
        font-size: 1.75rem;
    }
}

.cta-subtitle {
    font-size: 1.05rem;
    color: var(--primary-200);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.5;
}

.cta-giant-button {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    color: #ffffff;
    font-size: 1.2rem;
    font-weight: 800;
    padding: 1.25rem 3rem;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-cta);
    text-decoration: none;
    overflow: hidden;
    transition: var(--transition-fast);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.cta-giant-button:hover {
    background: linear-gradient(135deg, var(--primary-400), var(--primary-500));
    transform: translateY(-3px);
    box-shadow: 0 20px 40px -10px rgba(14, 165, 233, 0.6);
}

.cta-giant-button:active {
    transform: translateY(-1px);
}

.btn-shine-effect {
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
    animation: btnShine 3s infinite;
}

@keyframes btnShine {
    0% { left: -100%; }
    20% { left: 100%; }
    100% { left: 100%; }
}

.cta-trust-badges span {
    background: rgba(255, 255, 255, 0.9);
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-weight: 600;
    box-shadow: var(--shadow-subtle);
}

/* ==========================================================================
   REVIEWS SECTION
   ========================================================================== */
.reviews-section {
    position: relative;
}

.reviews-subtitle-tag {
    display: inline-block;
    color: var(--primary-600);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.reviews-section-title {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-950);
    letter-spacing: -0.02em;
    margin-bottom: 0.75rem;
}

.title-underline-decorator {
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-400), var(--primary-600));
    margin: 0 auto;
    border-radius: var(--radius-full);
}

.amazon-review-card {
    background: var(--card-bg);
    border: 1px solid var(--primary-100);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-subtle);
    padding: 1.75rem;
    transition: var(--transition-fast);
}

.amazon-review-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-card);
    border-color: var(--primary-300);
}

.review-avatar-wrap {
    position: relative;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    flex-shrink: 0;
}

.review-avatar-img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--primary-200);
}

.avatar-ring {
    position: absolute;
    inset: -3px;
    border-radius: 50%;
    border: 2px dashed var(--primary-400);
    animation: rotateRing 20s linear infinite;
    pointer-events: none;
}

@keyframes rotateRing {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.review-author-name {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--primary-950);
}

.review-date-location {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.stars-inline {
    color: #f59e0b;
    font-size: 1rem;
    letter-spacing: 2px;
}

.review-headline-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--primary-900);
}

.verified-purchase-badge-wrap {
    display: inline-flex;
    align-items: center;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--primary-700);
    background: var(--primary-50);
    padding: 3px 10px;
    border-radius: var(--radius-full);
    border: 1px solid var(--primary-200);
    margin: 0.5rem 0;
}

.review-body-text {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-top: 0.5rem;
}

/* ==========================================================================
   FOOTER STYLES
   ========================================================================== */
.site-footer {
    position: relative;
    background: var(--primary-950);
    color: var(--primary-200);
    border-top: 1px solid var(--primary-900);
}

.footer-top-accent {
    height: 4px;
    background: linear-gradient(90deg, var(--primary-400), var(--primary-600), var(--primary-300));
}

.footer-brand-title {
    font-size: 1.15rem;
    font-weight: 800;
    color: #ffffff;
    letter-spacing: -0.01em;
}

.footer-copyright-text {
    font-size: 0.85rem;
    color: var(--primary-400);
}

.footer-policy-link {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary-300);
    text-decoration: none;
    transition: var(--transition-fast);
}

.footer-policy-link:hover {
    color: #ffffff;
    text-decoration: underline;
}

/* ==========================================================================
   MEDIA QUERIES & RESPONSIVENESS
   ========================================================================== */
@media (max-width: 640px) {
    .product-master-card {
        padding: 1rem;
    }
    
    .product-main-title {
        font-size: 1.5rem;
    }
    
    .cta-giant-button {
        width: 100%;
        padding: 1rem 1.5rem;
        font-size: 1.05rem;
    }
}