/* ============================================
   GlowSwap - K-Beauty Dupe Finder Styles
   ============================================ */

:root {
    /* Colors */
    --gs-primary: #FF6B9D;
    --gs-primary-dark: #E8548A;
    --gs-secondary: #7C3AED;
    --gs-accent: #00D9FF;
    --gs-success: #10B981;
    --gs-warning: #F59E0B;
    
    /* Backgrounds */
    --gs-bg: #FAFAFA;
    --gs-bg-card: #FFFFFF;
    --gs-bg-input: #F3F4F6;
    
    /* Text */
    --gs-text: #1F2937;
    --gs-text-secondary: #6B7280;
    --gs-text-muted: #9CA3AF;
    
    /* Borders */
    --gs-border: #E5E7EB;
    --gs-border-focus: var(--gs-primary);
    
    /* Shadows */
    --gs-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --gs-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --gs-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --gs-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --gs-shadow-glow: 0 0 40px rgba(255, 107, 157, 0.3);
    
    /* Gradients */
    --gs-gradient: linear-gradient(135deg, #FF6B9D 0%, #7C3AED 50%, #00D9FF 100%);
    --gs-gradient-soft: linear-gradient(135deg, rgba(255, 107, 157, 0.1) 0%, rgba(124, 58, 237, 0.1) 100%);
    
    /* Typography */
    --gs-font-main: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
    --gs-font-display: 'Poppins', var(--gs-font-main);
    
    /* Sizing */
    --gs-header-height: 70px;
    --gs-radius: 12px;
    --gs-radius-lg: 20px;
}

/* Dark Theme */
[data-theme="dark"] {
    --gs-bg: #0F172A;
    --gs-bg-card: #1E293B;
    --gs-bg-input: #334155;
    --gs-text: #F1F5F9;
    --gs-text-secondary: #94A3B8;
    --gs-text-muted: #64748B;
    --gs-border: #334155;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--gs-font-main);
    background: var(--gs-bg);
    color: var(--gs-text);
    line-height: 1.6;
    min-height: 100vh;
}

/* ============================================
   Header
   ============================================ */
.gs-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--gs-header-height);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--gs-border);
    z-index: 1000;
    transition: all 0.3s ease;
}

[data-theme="dark"] .gs-header {
    background: rgba(15, 23, 42, 0.9);
}

.gs-header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.gs-back-link {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--gs-text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

.gs-back-link:hover {
    color: var(--gs-primary);
}

.gs-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--gs-font-display);
}

.gs-logo-icon {
    font-size: 28px;
    animation: spin 3s ease-in-out infinite;
}

@keyframes spin {
    0%, 100% { transform: rotate(0deg); }
    50% { transform: rotate(180deg); }
}

.gs-logo-text {
    font-size: 24px;
    font-weight: 700;
    color: var(--gs-text);
}

.gs-logo-accent {
    background: var(--gs-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.gs-header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Language Selector */
.gs-lang-selector {
    position: relative;
}

.gs-lang-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    background: var(--gs-bg-input);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    color: var(--gs-text);
    transition: all 0.3s;
}

.gs-lang-btn:hover {
    background: var(--gs-border);
}

.gs-lang-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 140px;
    background: var(--gs-bg-card);
    border: 1px solid var(--gs-border);
    border-radius: var(--gs-radius);
    box-shadow: var(--gs-shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s;
}

.gs-lang-selector:hover .gs-lang-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.gs-lang-option {
    display: block;
    padding: 10px 16px;
    color: var(--gs-text);
    text-decoration: none;
    font-size: 14px;
    transition: background 0.3s;
}

.gs-lang-option:hover,
.gs-lang-option.active {
    background: var(--gs-gradient-soft);
}

/* Theme Toggle */
.gs-theme-toggle {
    width: 44px;
    height: 44px;
    border: none;
    border-radius: 50%;
    background: var(--gs-bg-input);
    cursor: pointer;
    font-size: 20px;
    transition: all 0.3s;
}

.gs-theme-toggle:hover {
    background: var(--gs-border);
    transform: rotate(20deg);
}

/* ============================================
   Hero Section
   ============================================ */
.gs-hero {
    position: relative;
    padding: calc(var(--gs-header-height) + 60px) 24px 80px;
    overflow: hidden;
}

.gs-hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100%;
    background: var(--gs-gradient);
    opacity: 0.05;
    z-index: 0;
}

.gs-hero::before {
    content: '';
    position: absolute;
    top: 20%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255, 107, 157, 0.2) 0%, transparent 70%);
    border-radius: 50%;
    z-index: 0;
}

.gs-hero::after {
    content: '';
    position: absolute;
    bottom: 10%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(124, 58, 237, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    z-index: 0;
}

.gs-hero-content {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    z-index: 1;
}

.gs-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: var(--gs-bg-card);
    border: 1px solid var(--gs-border);
    border-radius: 50px;
    font-size: 14px;
    font-weight: 500;
    color: var(--gs-primary);
    margin-bottom: 24px;
    box-shadow: var(--gs-shadow);
}

.gs-badge-icon {
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

.gs-hero-title {
    font-family: var(--gs-font-display);
    font-size: clamp(32px, 6vw, 56px);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
}

.gs-gradient-text {
    background: var(--gs-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.gs-hero-subtitle {
    font-size: 18px;
    color: var(--gs-text-secondary);
    margin-bottom: 40px;
    line-height: 1.7;
}

/* Search Box */
.gs-search-container {
    position: relative;
    max-width: 600px;
    margin: 0 auto 24px;
}

.gs-search-box {
    display: flex;
    align-items: center;
    background: var(--gs-bg-card);
    border: 2px solid var(--gs-border);
    border-radius: 60px;
    padding: 8px 8px 8px 24px;
    box-shadow: var(--gs-shadow-lg);
    transition: all 0.3s;
}

.gs-search-box:focus-within {
    border-color: var(--gs-primary);
    box-shadow: var(--gs-shadow-glow);
}

.gs-search-icon {
    font-size: 20px;
    margin-right: 12px;
}

.gs-search-input {
    flex: 1;
    border: none;
    background: transparent;
    font-size: 16px;
    color: var(--gs-text);
    outline: none;
    font-family: var(--gs-font-main);
}

.gs-search-input::placeholder {
    color: var(--gs-text-muted);
}

.gs-search-btn {
    padding: 14px 32px;
    background: var(--gs-gradient);
    border: none;
    border-radius: 50px;
    color: white;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.gs-search-btn:hover {
    transform: scale(1.05);
    box-shadow: var(--gs-shadow-lg);
}

/* Search Suggestions */
.gs-search-suggestions {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    background: var(--gs-bg-card);
    border: 1px solid var(--gs-border);
    border-radius: var(--gs-radius);
    box-shadow: var(--gs-shadow-xl);
    max-height: 300px;
    overflow-y: auto;
    display: none;
    z-index: 100;
}

.gs-search-suggestions.active {
    display: block;
}

.gs-suggestion-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    cursor: pointer;
    transition: background 0.2s;
}

.gs-suggestion-item:hover {
    background: var(--gs-gradient-soft);
}

.gs-suggestion-brand {
    font-size: 12px;
    color: var(--gs-text-muted);
}

.gs-suggestion-name {
    font-weight: 500;
}

/* Quick Tags */
.gs-quick-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 8px;
}

.gs-quick-label {
    font-size: 14px;
    color: var(--gs-text-muted);
}

.gs-quick-tag {
    padding: 8px 16px;
    background: var(--gs-bg-card);
    border: 1px solid var(--gs-border);
    border-radius: 50px;
    font-size: 13px;
    color: var(--gs-text-secondary);
    cursor: pointer;
    transition: all 0.3s;
}

.gs-quick-tag:hover {
    background: var(--gs-gradient-soft);
    border-color: var(--gs-primary);
    color: var(--gs-primary);
}

/* ============================================
   How It Works Section
   ============================================ */
.gs-how-section {
    padding: 80px 24px;
    background: var(--gs-bg-card);
}

.gs-section-content {
    max-width: 1200px;
    margin: 0 auto;
}

.gs-section-title {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    font-family: var(--gs-font-display);
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 48px;
    text-align: center;
}

.gs-section-icon {
    font-size: 32px;
}

.gs-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.gs-step {
    flex: 1;
    min-width: 200px;
    max-width: 280px;
    text-align: center;
    padding: 32px 24px;
    background: var(--gs-bg);
    border-radius: var(--gs-radius-lg);
    position: relative;
}

.gs-step-number {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 30px;
    background: var(--gs-gradient);
    border-radius: 50%;
    color: white;
    font-weight: 700;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.gs-step-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.gs-step h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.gs-step p {
    font-size: 14px;
    color: var(--gs-text-secondary);
}

.gs-step-arrow {
    font-size: 28px;
    color: var(--gs-primary);
    font-weight: 700;
}

@media (max-width: 768px) {
    .gs-step-arrow {
        display: none;
    }
}

/* ============================================
   Results Section
   ============================================ */
.gs-results-section {
    padding: 80px 24px;
}

/* Original Product Card */
.gs-original-product {
    max-width: 600px;
    margin: 0 auto 40px;
    padding: 32px;
    background: var(--gs-bg-card);
    border: 2px solid var(--gs-border);
    border-radius: var(--gs-radius-lg);
    box-shadow: var(--gs-shadow-lg);
}

.gs-original-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 24px;
}

.gs-original-image {
    width: 100px;
    height: 100px;
    background: var(--gs-bg);
    border-radius: var(--gs-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
}

.gs-original-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: var(--gs-radius);
}

.gs-original-info h3 {
    font-size: 14px;
    color: var(--gs-text-muted);
    font-weight: 400;
    margin-bottom: 4px;
}

.gs-original-info h2 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
}

.gs-original-price {
    font-size: 24px;
    font-weight: 700;
    color: var(--gs-text-secondary);
}

.gs-original-ingredients {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--gs-border);
}

.gs-original-ingredients h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--gs-text-secondary);
}

.gs-ingredient-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.gs-ingredient-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 12px;
    background: var(--gs-bg);
    border-radius: 50px;
    font-size: 12px;
    color: var(--gs-text-secondary);
}

.gs-ingredient-tag.key {
    background: var(--gs-gradient-soft);
    color: var(--gs-primary);
    font-weight: 500;
}

/* Comparison Arrow */
.gs-comparison-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    margin: 40px 0;
}

.gs-arrow-line {
    flex: 1;
    max-width: 150px;
    height: 2px;
    background: var(--gs-gradient);
}

.gs-arrow-icon {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 16px;
    background: var(--gs-bg-card);
    border: 2px solid var(--gs-primary);
    border-radius: 50%;
    box-shadow: var(--gs-shadow-glow);
}

.gs-arrow-icon span:first-child {
    font-size: 28px;
    animation: spin 3s ease-in-out infinite;
}

.gs-swap-text {
    font-size: 10px;
    font-weight: 700;
    color: var(--gs-primary);
    letter-spacing: 1px;
}

/* Alternatives Grid */
.gs-alternatives {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
}

/* Alternative Card */
.gs-alternative-card {
    background: var(--gs-bg-card);
    border: 2px solid var(--gs-border);
    border-radius: var(--gs-radius-lg);
    padding: 24px;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

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

.gs-alternative-card.best-match {
    border-color: var(--gs-success);
}

.gs-match-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    padding: 6px 12px;
    background: var(--gs-success);
    color: white;
    font-size: 11px;
    font-weight: 600;
    border-radius: 50px;
}

.gs-alt-header {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
}

.gs-alt-image {
    width: 80px;
    height: 80px;
    background: var(--gs-bg);
    border-radius: var(--gs-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
    flex-shrink: 0;
}

.gs-alt-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: var(--gs-radius);
}

.gs-alt-info {
    flex: 1;
}

.gs-alt-brand {
    font-size: 12px;
    color: var(--gs-text-muted);
    margin-bottom: 4px;
}

.gs-alt-name {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    line-height: 1.3;
}

.gs-alt-price-row {
    display: flex;
    align-items: center;
    gap: 12px;
}

.gs-alt-price {
    font-size: 20px;
    font-weight: 700;
    color: var(--gs-primary);
}

.gs-alt-savings {
    padding: 4px 8px;
    background: rgba(16, 185, 129, 0.1);
    color: var(--gs-success);
    font-size: 12px;
    font-weight: 600;
    border-radius: 4px;
}

/* Comparison Stats */
.gs-comparison-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin: 20px 0;
    padding: 16px;
    background: var(--gs-bg);
    border-radius: var(--gs-radius);
}

.gs-stat-item {
    text-align: center;
}

.gs-stat-label {
    font-size: 11px;
    color: var(--gs-text-muted);
    margin-bottom: 4px;
}

.gs-stat-value {
    font-size: 16px;
    font-weight: 700;
}

.gs-stat-value.better {
    color: var(--gs-success);
}

.gs-stat-value.same {
    color: var(--gs-warning);
}

/* Key Ingredients Match */
.gs-ingredients-match {
    margin-bottom: 20px;
}

.gs-ingredients-match h4 {
    font-size: 12px;
    font-weight: 600;
    color: var(--gs-text-secondary);
    margin-bottom: 8px;
}

.gs-match-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.gs-match-tag {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    background: rgba(16, 185, 129, 0.1);
    color: var(--gs-success);
    border-radius: 50px;
    font-size: 11px;
    font-weight: 500;
}

.gs-match-tag.extra {
    background: rgba(124, 58, 237, 0.1);
    color: var(--gs-secondary);
}

/* Buy Button */
.gs-buy-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 14px;
    background: var(--gs-gradient);
    border: none;
    border-radius: var(--gs-radius);
    color: white;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
}

.gs-buy-btn:hover {
    transform: scale(1.02);
    box-shadow: var(--gs-shadow-lg);
}

/* Buy Button Group for Multiple Affiliates */
.gs-buy-btn-group {
    display: flex;
    gap: 8px;
    margin-top: 16px;
}

.gs-buy-btn-group .gs-buy-btn {
    flex: 1;
    margin-top: 0;
    font-size: 14px;
    padding: 12px 16px;
}

.gs-buy-coupang {
    background: var(--gs-gradient);
}

.gs-buy-amazon {
    background: linear-gradient(135deg, #FF9900 0%, #FF6600 100%);
}

/* ============================================
   Popular Swaps Section
   ============================================ */
.gs-popular-section {
    padding: 80px 24px;
    background: var(--gs-bg-card);
}

.gs-popular-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.gs-popular-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    background: var(--gs-bg);
    border: 1px solid var(--gs-border);
    border-radius: var(--gs-radius);
    cursor: pointer;
    transition: all 0.3s;
}

.gs-popular-card:hover {
    border-color: var(--gs-primary);
    transform: translateY(-3px);
    box-shadow: var(--gs-shadow);
}

.gs-popular-rank {
    width: 36px;
    height: 36px;
    background: var(--gs-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 14px;
    flex-shrink: 0;
}

.gs-popular-content {
    flex: 1;
    min-width: 0;
}

.gs-popular-from {
    font-size: 13px;
    color: var(--gs-text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.gs-popular-arrow {
    color: var(--gs-primary);
    font-size: 14px;
    margin: 4px 0;
}

.gs-popular-to {
    font-size: 14px;
    font-weight: 600;
    color: var(--gs-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.gs-popular-savings {
    padding: 4px 10px;
    background: rgba(16, 185, 129, 0.1);
    color: var(--gs-success);
    font-size: 12px;
    font-weight: 600;
    border-radius: 4px;
    flex-shrink: 0;
}

/* ============================================
   Why K-Beauty Section
   ============================================ */
.gs-why-section {
    padding: 80px 24px;
}

.gs-benefits {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
}

.gs-benefit {
    text-align: center;
    padding: 32px 24px;
    background: var(--gs-bg-card);
    border: 1px solid var(--gs-border);
    border-radius: var(--gs-radius-lg);
    transition: all 0.3s;
}

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

.gs-benefit-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.gs-benefit h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
}

.gs-benefit p {
    font-size: 14px;
    color: var(--gs-text-secondary);
    line-height: 1.6;
}

/* ============================================
   Ad Container
   ============================================ */
.gs-ad-container {
    padding: 40px 24px;
    max-width: 728px;
    margin: 0 auto;
}

.gs-ad-placeholder {
    padding: 60px 20px;
    background: var(--gs-bg-card);
    border: 2px dashed var(--gs-border);
    border-radius: var(--gs-radius);
    text-align: center;
    color: var(--gs-text-muted);
    font-size: 14px;
}

/* ============================================
   Footer
   ============================================ */
.gs-footer {
    padding: 60px 24px 40px;
    background: var(--gs-bg-card);
    border-top: 1px solid var(--gs-border);
}

.gs-footer-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.gs-footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 16px;
}

.gs-footer-desc {
    font-size: 14px;
    color: var(--gs-text-secondary);
    line-height: 1.7;
    margin-bottom: 24px;
}

.gs-footer-desc small {
    font-size: 12px;
    color: var(--gs-text-muted);
}

.gs-footer-links {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 24px;
}

.gs-footer-link {
    color: var(--gs-text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

.gs-footer-link:hover {
    color: var(--gs-primary);
}

.gs-footer-copyright {
    font-size: 12px;
    color: var(--gs-text-muted);
}

/* ============================================
   Loading Overlay
   ============================================ */
.gs-loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
}

.gs-loading-overlay.active {
    opacity: 1;
    visibility: visible;
}

.gs-loading-content {
    text-align: center;
    color: white;
}

.gs-loading-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.2);
    border-top-color: var(--gs-primary);
    border-radius: 50%;
    margin: 0 auto 20px;
    animation: spinner 1s linear infinite;
}

@keyframes spinner {
    to { transform: rotate(360deg); }
}

.gs-loading-text {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
}

.gs-loading-subtext {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

/* ============================================
   Responsive Design
   ============================================ */

/* Small Mobile (max-width: 374px) */
@media (max-width: 374px) {
    .gs-hero-title {
        font-size: 22px;
    }
    
    .gs-hero-subtitle {
        font-size: 13px;
    }
    
    .gs-search-input {
        font-size: 14px;
    }
    
    .gs-quick-tag {
        padding: 5px 10px;
        font-size: 11px;
    }
    
    .gs-section-title {
        font-size: 18px;
    }
    
    .gs-alt-name {
        font-size: 13px;
    }
    
    .gs-popular-from,
    .gs-popular-to {
        font-size: 12px;
    }
}

/* Mobile (max-width: 767px) */
@media (max-width: 767px) {
    .gs-header {
        height: 56px;
    }
    
    .gs-header-content {
        padding: 0 12px;
    }
    
    .gs-back-link {
        padding: 8px 12px;
        font-size: 13px;
    }
    
    .gs-back-link span {
        display: none;
    }
    
    .gs-logo {
        gap: 6px;
    }
    
    .gs-logo-icon {
        font-size: 20px;
    }
    
    .gs-logo-text {
        font-size: 18px;
    }
    
    .gs-header-actions {
        gap: 6px;
    }
    
    .gs-theme-toggle,
    .gs-lang-btn {
        min-width: 40px;
        min-height: 40px;
        padding: 8px;
    }
    
    .gs-hero {
        padding: calc(56px + 24px) 16px 40px;
    }
    
    .gs-hero-title {
        font-size: 26px;
        line-height: 1.3;
    }
    
    .gs-hero-subtitle {
        font-size: 14px;
        margin-bottom: 24px;
    }
    
    .gs-search-container {
        max-width: 100%;
    }
    
    .gs-search-box {
        flex-direction: column;
        padding: 14px;
        border-radius: 16px;
        gap: 0;
    }
    
    .gs-search-input {
        width: 100%;
        text-align: center;
        padding: 14px 0;
        font-size: 15px;
    }
    
    .gs-search-icon {
        display: none;
    }
    
    .gs-search-btn {
        width: 100%;
        margin-top: 10px;
        padding: 14px;
        min-height: 48px;
        font-size: 15px;
    }
    
    .gs-quick-tags {
        gap: 8px;
        margin-top: 16px;
    }
    
    .gs-quick-tag {
        padding: 8px 14px;
        font-size: 13px;
        min-height: 36px;
    }
    
    .gs-how-section {
        padding: 50px 16px;
    }
    
    .gs-section-title {
        font-size: 20px;
        margin-bottom: 30px;
    }
    
    .gs-steps {
        gap: 20px;
    }
    
    .gs-step {
        padding: 20px 16px;
    }
    
    .gs-step-icon {
        font-size: 32px;
    }
    
    .gs-step h3 {
        font-size: 15px;
    }
    
    .gs-step p {
        font-size: 13px;
    }
    
    .gs-results-section {
        padding: 40px 16px;
    }
    
    .gs-original-product {
        padding: 16px;
        margin-bottom: 24px;
    }
    
    .gs-original-header {
        gap: 12px;
    }
    
    .gs-original-image {
        width: 70px;
        height: 70px;
        font-size: 36px;
    }
    
    .gs-original-info h2 {
        font-size: 16px;
    }
    
    .gs-original-info h3 {
        font-size: 12px;
    }
    
    .gs-original-price {
        font-size: 18px;
    }
    
    .gs-alternatives {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .gs-alternative-card {
        padding: 16px;
    }
    
    .gs-alt-header {
        gap: 12px;
    }
    
    .gs-alt-image {
        width: 60px;
        height: 60px;
        font-size: 28px;
    }
    
    .gs-alt-name {
        font-size: 14px;
    }
    
    .gs-alt-price {
        font-size: 16px;
    }
    
    .gs-alt-savings {
        font-size: 11px;
        padding: 3px 8px;
    }
    
    .gs-comparison-stats {
        gap: 8px;
    }
    
    .gs-stat-item {
        padding: 10px;
    }
    
    .gs-buy-btn {
        padding: 14px;
        font-size: 14px;
        min-height: 48px;
    }
    
    .gs-popular-section {
        padding: 50px 16px;
    }
    
    .gs-popular-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .gs-popular-card {
        padding: 14px;
        gap: 12px;
    }
    
    .gs-popular-rank {
        width: 32px;
        height: 32px;
        font-size: 12px;
    }
    
    .gs-popular-from {
        font-size: 12px;
    }
    
    .gs-popular-to {
        font-size: 13px;
    }
    
    .gs-popular-savings {
        font-size: 14px;
    }
    
    .gs-benefits-section {
        padding: 50px 16px;
    }
    
    .gs-benefits {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    
    .gs-benefit-card {
        padding: 16px;
    }
    
    .gs-benefit-icon {
        font-size: 28px;
    }
    
    .gs-benefit-title {
        font-size: 13px;
    }
    
    .gs-benefit-desc {
        font-size: 11px;
    }
    
    .gs-cta-section {
        padding: 50px 16px;
    }
    
    .gs-cta-title {
        font-size: 22px;
    }
    
    .gs-cta-subtitle {
        font-size: 14px;
    }
    
    .gs-cta-btn {
        padding: 14px 28px;
        font-size: 15px;
        min-height: 48px;
    }
    
    .gs-footer {
        padding: 30px 16px;
    }
    
    .gs-footer p {
        font-size: 12px;
    }
}

@media (max-width: 480px) {
    .gs-benefits {
        grid-template-columns: 1fr;
    }
    
    .gs-original-header {
        flex-direction: column;
        text-align: center;
    }
    
    .gs-comparison-stats {
        grid-template-columns: 1fr;
    }
    
    .gs-hero-title {
        font-size: 24px;
    }
}

/* Touch Device Optimization */
@media (hover: none) and (pointer: coarse) {
    .gs-search-btn,
    .gs-quick-tag,
    .gs-buy-btn,
    .gs-cta-btn {
        min-height: 48px;
    }
    
    .gs-popular-card,
    .gs-alternative-card {
        min-height: 60px;
    }
    
    .gs-popular-card:hover,
    .gs-alternative-card:hover {
        transform: none;
    }
}

/* ============================================
   Product Selector Modal
   ============================================ */
.gs-selector-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.gs-selector-modal.active {
    opacity: 1;
    visibility: visible;
}

.gs-selector-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
}

.gs-selector-content {
    position: relative;
    width: 100%;
    max-width: 600px;
    max-height: 80vh;
    background: var(--gs-bg-card);
    border-radius: var(--gs-radius-lg);
    box-shadow: var(--gs-shadow-xl);
    overflow: hidden;
    transform: translateY(20px) scale(0.95);
    transition: all 0.3s ease;
}

.gs-selector-modal.active .gs-selector-content {
    transform: translateY(0) scale(1);
}

.gs-selector-header {
    position: relative;
    padding: 24px 24px 16px;
    border-bottom: 1px solid var(--gs-border);
}

.gs-selector-header h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--gs-text);
    margin-bottom: 4px;
}

.gs-selector-header p {
    font-size: 14px;
    color: var(--gs-text-muted);
}

.gs-selector-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 32px;
    height: 32px;
    border: none;
    background: var(--gs-bg);
    border-radius: 50%;
    font-size: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gs-text-muted);
    transition: all 0.2s;
}

.gs-selector-close:hover {
    background: var(--gs-primary);
    color: white;
}

.gs-selector-list {
    max-height: 50vh;
    overflow-y: auto;
    padding: 12px;
}

.gs-selector-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    margin-bottom: 8px;
    background: var(--gs-bg);
    border: 2px solid transparent;
    border-radius: var(--gs-radius);
    cursor: pointer;
    transition: all 0.2s;
}

.gs-selector-item:hover {
    border-color: var(--gs-primary);
    transform: translateX(5px);
}

.gs-selector-item:last-child {
    margin-bottom: 0;
}

.gs-selector-emoji {
    font-size: 36px;
    flex-shrink: 0;
}

.gs-selector-info {
    flex: 1;
    min-width: 0;
}

.gs-selector-brand {
    font-size: 12px;
    font-weight: 600;
    color: var(--gs-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.gs-selector-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--gs-text);
    margin-bottom: 2px;
}

.gs-selector-name-kr {
    font-size: 13px;
    color: var(--gs-text-secondary);
    margin-bottom: 4px;
}

.gs-selector-desc {
    font-size: 12px;
    color: var(--gs-text-muted);
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.gs-selector-price {
    font-size: 16px;
    font-weight: 700;
    color: var(--gs-text);
    flex-shrink: 0;
}

.gs-selector-tip {
    padding: 16px 24px;
    background: rgba(124, 58, 237, 0.1);
    font-size: 13px;
    color: var(--gs-secondary);
    text-align: center;
}

/* ============================================
   No Results Styles
   ============================================ */
.gs-no-results {
    text-align: center;
    padding: 60px 20px;
}

.gs-no-results-icon {
    font-size: 64px;
    margin-bottom: 20px;
    opacity: 0.5;
}

.gs-no-results h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--gs-text);
    margin-bottom: 12px;
}

.gs-no-results p {
    font-size: 14px;
    color: var(--gs-text-muted);
    margin-bottom: 24px;
}

.gs-suggest-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
}

.gs-suggest-tag {
    padding: 10px 20px;
    background: var(--gs-bg);
    border: 1px solid var(--gs-border);
    border-radius: var(--gs-radius-full);
    font-size: 14px;
    font-weight: 500;
    color: var(--gs-text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.gs-suggest-tag:hover {
    background: var(--gs-primary);
    border-color: var(--gs-primary);
    color: white;
}

/* ============================================
   Mobile Responsive for Modal
   ============================================ */
@media (max-width: 600px) {
    .gs-selector-content {
        max-height: 90vh;
    }
    
    .gs-selector-item {
        padding: 12px;
        gap: 12px;
    }
    
    .gs-selector-emoji {
        font-size: 28px;
    }
    
    .gs-selector-name {
        font-size: 14px;
    }
    
    .gs-selector-name-kr {
        font-size: 12px;
    }
}

/* ============================================
   Amazon Associates Mobile Compliance
   - Minimum touch target: 44x44px
   - Readable font sizes: 16px minimum
   - Clear affiliate disclosure
   - Accessible navigation
   ============================================ */

/* Skip Navigation Link */
.gs-skip-link {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--gs-gradient);
    color: white;
    padding: 16px 24px;
    z-index: 9999;
    transition: top 0.3s;
    font-size: 14px;
}

.gs-skip-link:focus {
    top: 0;
}

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

/* Affiliate Disclosure Styles */
.gs-affiliate-disclosure {
    background: linear-gradient(135deg, rgba(255, 107, 157, 0.1) 0%, rgba(124, 58, 237, 0.1) 100%);
    border-bottom: 1px solid rgba(255, 107, 157, 0.2);
    padding: 12px 16px;
    margin-top: var(--gs-header-height);
    font-size: 12px;
    color: var(--gs-text-secondary);
    text-align: center;
    line-height: 1.5;
}

.gs-affiliate-disclosure strong {
    color: var(--gs-primary);
}

.gs-affiliate-disclosure-footer {
    background: rgba(124, 58, 237, 0.1);
    border: 1px solid rgba(124, 58, 237, 0.2);
    border-radius: var(--gs-radius);
    padding: 16px;
    margin: 16px 0;
    font-size: 11px;
    color: var(--gs-text-secondary);
    text-align: center;
    line-height: 1.6;
}

.gs-affiliate-disclosure-footer strong {
    color: var(--gs-secondary);
    display: block;
    margin-bottom: 8px;
    font-size: 12px;
}

/* Focus Styles for Accessibility */
a:focus-visible,
button:focus-visible,
input:focus-visible {
    outline: 3px solid var(--gs-primary);
    outline-offset: 2px;
}

/* Enhanced Mobile Touch Targets */
@media (max-width: 767px) {
    /* Ensure readable font sizes */
    body {
        font-size: 16px;
    }
    
    /* Header adjustments */
    .gs-affiliate-disclosure {
        margin-top: 56px;
        padding: 10px 12px;
        font-size: 11px;
    }
    
    .gs-hero {
        padding: calc(56px + 60px) 16px 40px;
    }
    
    /* All interactive elements must be at least 44x44px */
    a, button {
        min-height: 44px;
    }
    
    /* Search button - larger for easy tapping */
    .gs-search-btn {
        min-height: 48px;
        padding: 14px 20px;
        font-size: 16px;
    }
    
    /* Quick tags - easy to tap */
    .gs-quick-tag {
        min-height: 44px;
        padding: 12px 16px;
        font-size: 14px;
    }
    
    /* Buy button - large touch target */
    .gs-buy-btn {
        min-height: 48px;
        padding: 14px 20px;
        font-size: 16px;
    }
    
    /* Theme toggle and language button */
    .gs-theme-toggle,
    .gs-lang-btn {
        min-width: 44px;
        min-height: 44px;
    }
    
    /* Back link */
    .gs-back-link {
        min-height: 44px;
        min-width: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    /* Search input */
    .gs-search-input {
        min-height: 48px;
        font-size: 16px;
    }
    
    /* Popular cards - larger touch target */
    .gs-popular-card {
        min-height: 60px;
        padding: 16px;
    }
    
    /* Alternative cards */
    .gs-alternative-card {
        padding: 20px;
    }
    
    /* Selector items - larger touch target */
    .gs-selector-item {
        min-height: 60px;
        padding: 16px;
    }
    
    /* Footer links */
    .gs-footer-link {
        min-height: 44px;
        display: inline-flex;
        align-items: center;
    }
}

/* Touch Device Optimization */
@media (hover: none) and (pointer: coarse) {
    .gs-popular-card:hover,
    .gs-alternative-card:hover,
    .gs-benefit:hover {
        transform: none;
    }
    
    .gs-search-btn,
    .gs-quick-tag,
    .gs-buy-btn {
        min-height: 48px;
    }
    
    .gs-theme-toggle,
    .gs-lang-btn,
    .gs-back-link {
        min-width: 44px;
        min-height: 44px;
    }
}