/* ==========================================================================
   PREMIUM CUSTOM DESIGN ARCHITECTURE FOR ANKLE BRACE LANDING PAGE
   Palette Strategy: Strictly Focused Yellow/Amber Palette & Neutral Backing Layers
   ========================================================================== */

/* Root Level Design System Configuration with CSS Variables */
:root {
    --primary-amber: #f59e0b;
    --primary-light-yellow: #fef3c7;
    --primary-deep-gold: #d97706;
    --primary-dark-tint: #78350f;
    --neutral-ultra-light: #fffdf9;
    --neutral-card-bg: #ffffff;
    --neutral-slate-dark: #111827;
    --neutral-text-main: #1f2937;
    --neutral-muted-gray: #6b7280;
    --neutral-border-light: #f3f4f6;
    
    --shadow-layered-1: 0 4px 6px -1px rgba(217, 119, 6, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-layered-2: 0 10px 15px -3px rgba(217, 119, 6, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.02);
    --shadow-layered-3: 0 20px 25px -5px rgba(217, 119, 6, 0.12), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-deep-premium: 0 25px 50px -12px rgba(217, 119, 6, 0.18);
    --shadow-cta-glow: 0 0 40px rgba(245, 158, 11, 0.45);
    
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-snappy: all 0.2s ease-out;
}

/* Base resets & structural definitions */
html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    background-color: var(--neutral-ultra-light);
    color: var(--neutral-text-main);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    overflow-x: hidden;
}

/* Decorative Background Glow Spheres inside the yellow palette framework */
.glow-sphere {
    position: absolute;
    border-radius: 50%;
    filter: blur(140px);
    z-index: 1;
    pointer-events: none;
    opacity: 0.45;
    animation: floatingGlow 12s ease-in-out infinite alternate;
}
.glow-sphere-1 {
    width: 400px;
    height: 400px;
    background-color: var(--primary-light-yellow);
    top: -100px;
    left: -150px;
}
.glow-sphere-2 {
    width: 500px;
    height: 500px;
    background-color: #fde68a;
    top: 40%;
    right: -200px;
    animation-delay: -3s;
}
.glow-sphere-3 {
    width: 350px;
    height: 350px;
    background-color: var(--primary-light-yellow);
    bottom: 10%;
    left: -100px;
    animation-delay: -6s;
}

@keyframes floatingGlow {
    0% { transform: translateY(0) scale(1); }
    100% { transform: translateY(30px) scale(1.1); }
}

/* ==========================================================================
   HEADER COMPONENT STYLING
   ========================================================================== */
.site-header {
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    background-color: rgba(255, 255, 255, 0.92);
    border-bottom: 1px solid rgba(245, 158, 11, 0.15);
}

.header-accent-line {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background-gradient: linear-gradient(90deg, transparent, var(--primary-amber), transparent);
    background-color: var(--primary-amber);
    border-radius: fill;
}

.header-brand {
    letter-spacing: 0.25em;
    text-shadow: 0 1px 2px rgba(245, 158, 11, 0.1);
}

/* ==========================================================================
   PRODUCT SHOWCASE HERO CARD (CENTRAL SUITE)
   ========================================================================== */
.product-hero-card {
    box-shadow: var(--shadow-layered-3), var(--shadow-deep-premium);
    border: 1px solid rgba(245, 158, 11, 0.12);
    transition: var(--transition-smooth);
}

.product-hero-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-layered-3), 0 35px 60px -12px rgba(217, 119, 6, 0.22);
}

.card-glow-overlay {
    position: absolute;
    top: 0;
    right: 0;
    width: 250px;
    height: 250px;
    background: radial-gradient(circle at top right, rgba(254, 243, 199, 0.5), transparent 70%);
    pointer-events: none;
}

/* Dynamic Typography Headings Accents */
.h1-wrapper h1 {
    letter-spacing: -0.02em;
}

.h1-decorative-bar {
    width: 65px;
    height: 5px;
    background: linear-gradient(90deg, var(--primary-amber), var(--primary-deep-gold));
    box-shadow: 0 2px 4px rgba(217, 119, 6, 0.3);
}

/* ==========================================================================
   PURE CSS NO-JAVASCRIPT GALLERY SYSTEM
   ========================================================================== */
.gallery-root {
    position: relative;
}

/* Core Multi-Layer State Configuration mapping via Radio Checked Pseudo selectors */
.gallery-hidden-trigger {
    display: none !important;
}

/* Slide Selection Logic */
.trigger-1:checked ~ .main-image-display-frame .slide-layer-1 { opacity: 1; transform: scale(1); pointer-events: auto; z-index: 10; }
.trigger-2:checked ~ .main-image-display-frame .slide-layer-2 { opacity: 1; transform: scale(1); pointer-events: auto; z-index: 10; }
.trigger-3:checked ~ .main-image-display-frame .slide-layer-3 { opacity: 1; transform: scale(1); pointer-events: auto; z-index: 10; }
.trigger-4:checked ~ .main-image-display-frame .slide-layer-4 { opacity: 1; transform: scale(1); pointer-events: auto; z-index: 10; }

/* Thumbnail Active Highlighting border configurations */
.trigger-1:checked ~ .thumbnail-control-row .thumb-wrapper-1 { border-color: var(--primary-amber); box-shadow: 0 0 12px rgba(245, 158, 11, 0.35); transform: translateY(-2px); background-color: var(--primary-light-yellow); }
.trigger-2:checked ~ .thumbnail-control-row .thumb-wrapper-2 { border-color: var(--primary-amber); box-shadow: 0 0 12px rgba(245, 158, 11, 0.35); transform: translateY(-2px); background-color: var(--primary-light-yellow); }
.trigger-3:checked ~ .thumbnail-control-row .thumb-wrapper-3 { border-color: var(--primary-amber); box-shadow: 0 0 12px rgba(245, 158, 11, 0.35); transform: translateY(-2px); background-color: var(--primary-light-yellow); }
.trigger-4:checked ~ .thumbnail-control-row .thumb-wrapper-4 { border-color: var(--primary-amber); box-shadow: 0 0 12px rgba(245, 158, 11, 0.35); transform: translateY(-2px); background-color: var(--primary-light-yellow); }

.main-image-display-frame {
    box-shadow: inset 0 2px 8px rgba(0,0,0,0.04), 0 8px 24px -8px rgba(0,0,0,0.05);
    border: 1px solid rgba(0, 0, 0, 0.04);
}

.product-img-element {
    transition: var(--transition-smooth);
    max-height: 90%;
}

.main-image-display-frame:hover .product-img-element {
    transform: scale(1.03);
}

/* Thumbnail Wrappers Interactions */
.thumb-wrapper {
    border-color: var(--neutral-border-light);
    transition: var(--transition-snappy);
}

.thumb-wrapper:hover {
    border-color: var(--primary-amber);
    transform: translateY(-1px);
}

/* ==========================================================================
   PRODUCT DESCRIPTION SEGMENT BLOCKS OUTFITTING
   ========================================================================== */
.feature-card-segment {
    box-shadow: var(--shadow-layered-1);
    transition: var(--transition-snappy);
    position: relative;
    overflow: hidden;
}

.feature-card-segment::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background-color: var(--neutral-border-light);
    transition: var(--transition-snappy);
}

.feature-card-segment:hover {
    transform: translateX(3px);
    box-shadow: var(--shadow-layered-2);
    border-color: rgba(245, 158, 11, 0.15);
}

.feature-card-segment:hover::before {
    background-color: var(--primary-amber);
}

.segment-bullet {
    display: inline-block;
    color: var(--primary-deep-gold);
}

.keywords-notice-card {
    box-shadow: inset 0 1px 4px rgba(217, 119, 6, 0.06);
}

/* ==========================================================================
   HIGH IMPACT CENTERED CTA BLOCK
   ========================================================================== */
.cta-master-container {
    background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
    border: 1px solid rgba(245, 158, 11, 0.25);
    box-shadow: var(--shadow-layered-2);
}

.cta-background-decor {
    position: absolute;
    top: -50%;
    left: -20%;
    width: 300px;
    height: 300px;
    border-radius: 40%;
    background-color: rgba(245, 158, 11, 0.08);
    pointer-events: none;
    transform: rotate(25deg);
    animation: slowRotate 25s linear infinite;
}

@keyframes slowRotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* The Ultimate Action Button inside the Yellow Palette System */
.ultimate-cta-button {
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
    box-shadow: 0 10px 25px -5px rgba(245, 158, 11, 0.5), 0 8px 10px -6px rgba(245, 158, 11, 0.3);
    border: 1px solid #d97706;
    position: relative;
    overflow: hidden;
    z-index: 5;
    animation: gentlePulse 3s infinite;
}

.ultimate-cta-button::after {
    content: '';
    position: absolute;
    top: 0;
    left: -50%;
    width: 30%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.35), transparent);
    transform: skewX(-25deg);
    transition: none;
}

.ultimate-cta-button:hover {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    box-shadow: var(--shadow-cta-glow);
    transform: translateY(-2px) scale(1.02);
    color: #ffffff;
}

.ultimate-cta-button:hover::after {
    left: 150%;
    transition: all 0.7s ease-in-out;
}

.ultimate-cta-button:active {
    transform: translateY(1px) scale(0.99);
    box-shadow: 0 5px 15px -3px rgba(245, 158, 11, 0.6);
}

@keyframes gentlePulse {
    0% { box-shadow: 0 10px 25px -5px rgba(245, 158, 11, 0.5); }
    50% { box-shadow: 0 10px 30px 8px rgba(245, 158, 11, 0.35); }
    100% { box-shadow: 0 10px 25px -5px rgba(245, 158, 11, 0.5); }
}

/* ==========================================================================
   AMAZON-STYLE HIGH FIDELITY REVIEWS MODULE
   ========================================================================== */
.reviews-section-wrapper {
    box-shadow: var(--shadow-layered-2);
}

.amazon-review-item {
    border-radius: 16px;
    background-color: transparent;
    transition: var(--transition-smooth);
}

.amazon-review-item:hover {
    background-color: rgba(254, 243, 199, 0.15);
    transform: scale(1.005);
}

.avatar-container {
    display: inline-block;
}

.stars-indicator {
    letter-spacing: 0.05em;
    text-shadow: 0 1px 1px rgba(245, 158, 11, 0.15);
}

.meta-verified {
    letter-spacing: 0.03em;
    border: 1px solid rgba(217, 119, 6, 0.15);
}

.review-body-text {
    color: #2d3748;
}

.review-attachment-box {
    box-shadow: 0 2px 6px rgba(0,0,0,0.04);
}

/* ==========================================================================
   STRUCTURAL PREMIUM FOOTER LAYER
   ========================================================================== */
.site-footer {
    box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.04);
}

.footer-title {
    letter-spacing: 0.15em;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.footer-link {
    transition: var(--transition-snappy);
}

.footer-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 1px;
    background-color: var(--primary-amber);
    transition: var(--transition-snappy);
    transform: translateX(-50%);
}

.footer-link:hover {
    color: #ffffff;
}

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

/* ==========================================================================
   MOBILE-FIRST RESPONSIVE MEDIA BREAKPOINTS MEDIA QUERIES
   ========================================================================== */

/* Extra small micro-devices fallback adaptation override */
@media (max-width: 350px) {
    .thumbnail-control-row {
        gap: 2px !important;
    }
    .thumb-wrapper {
        padding: 1px !important;
    }
    .ultimate-cta-button {
        padding-left: 1.5rem !important;
        padding-right: 1.5rem !important;
        font-size: 0.875rem !important;
    }
}

/* Tablet Layout Optimizations (768px onwards) */
@media (min-width: 768px) {
    .amazon-review-item {
        p: 1.5rem;
    }
}

/* Desktop layout optimization logic handles transitions neatly */
@media (min-width: 1024px) {
    .header-title {
        letter-spacing: 0.05em;
    }
}