:root{--font-size-xs: .75rem;--font-size-sm: .875rem;--font-size-base: 1rem;--font-size-lg: 1.125rem;--font-size-xl: 1.25rem;--font-size-2xl: 1.5rem;--font-size-3xl: 2rem;--space-xs: .25rem;--space-sm: .5rem;--space-md: 1rem;--space-lg: 1.5rem;--space-xl: 2rem;--space-2xl: 3rem;--touch-target: 44px;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--radius-xl: 16px;--radius-full: 9999px;--transition-fast: .15s ease;--transition-base: .25s ease;--transition-slow: .35s ease;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.5;font-weight:400;font-size:16px;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;-webkit-text-size-adjust:100%}:root,[data-theme=dark]{--color-primary: #94a3b8;--color-primary-hover: #b0bec9;--color-accent: #64748b;--color-success: #6b9080;--color-danger: #c0524e;--color-text: #e2e8f0;--color-text-secondary: #94a3b8;--color-text-muted: #64748b;--color-bg: #0f172a;--color-bg-secondary: #1e293b;--color-bg-card: #1e293b;--color-bg-elevated: #1e293b;--color-border: #334155;--color-hero-bg: #1e293b;--color-hero-text: #e2e8f0;--color-hero-subtext: #94a3b8;--color-price: #cbd5e1;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);--shadow-md: 0 4px 6px rgba(0, 0, 0, .3);--shadow-lg: 0 10px 15px rgba(0, 0, 0, .3);--shadow-xl: 0 20px 25px rgba(0, 0, 0, .3);color-scheme:dark}[data-theme=light]{--color-primary: #475569;--color-primary-hover: #334155;--color-accent: #64748b;--color-success: #5a8a6f;--color-danger: #b84040;--color-text: #1e293b;--color-text-secondary: #475569;--color-text-muted: #94a3b8;--color-bg: #f8fafc;--color-bg-secondary: #f1f5f9;--color-bg-card: #ffffff;--color-bg-elevated: #ffffff;--color-border: #e2e8f0;--color-hero-bg: #f1f5f9;--color-hero-text: #1e293b;--color-hero-subtext: #475569;--color-price: #334155;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px rgba(0, 0, 0, .07);--shadow-lg: 0 10px 15px rgba(0, 0, 0, .1);--shadow-xl: 0 20px 25px rgba(0, 0, 0, .1);color-scheme:light}@media(prefers-color-scheme:light){:root:not([data-theme]){--color-primary: #475569;--color-primary-hover: #334155;--color-accent: #64748b;--color-success: #5a8a6f;--color-danger: #b84040;--color-text: #1e293b;--color-text-secondary: #475569;--color-text-muted: #94a3b8;--color-bg: #f8fafc;--color-bg-secondary: #f1f5f9;--color-bg-card: #ffffff;--color-bg-elevated: #ffffff;--color-border: #e2e8f0;--color-hero-bg: #f1f5f9;--color-hero-text: #1e293b;--color-hero-subtext: #475569;--color-price: #334155;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px rgba(0, 0, 0, .07);--shadow-lg: 0 10px 15px rgba(0, 0, 0, .1);--shadow-xl: 0 20px 25px rgba(0, 0, 0, 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var(--transition-fast)}.sell-input:focus{border-color:var(--color-primary)}.sell-input::placeholder{color:var(--color-text-muted)}.sell-select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:40px;cursor:pointer}.sell-textarea{min-height:120px;resize:vertical;line-height:1.6}.sell-price-input{display:flex;align-items:stretch}.sell-price-prefix{display:flex;align-items:center;padding:0 var(--space-md);background:var(--color-bg-secondary);border:1px solid var(--color-border);border-right:none;border-radius:var(--radius-md) 0 0 var(--radius-md);font-size:var(--font-size-sm);font-weight:600;color:var(--color-text-secondary)}.sell-price-input .sell-input{border-radius:0 var(--radius-md) var(--radius-md) 0;flex:1}.sell-image-upload{border:2px dashed var(--color-border);border-radius:var(--radius-lg);padding:var(--space-2xl);cursor:pointer;transition:border-color var(--transition-fast),background var(--transition-fast);display:flex;align-items:center;justify-content:center;min-height:200px;overflow:hidden}.sell-image-upload:hover{border-color:var(--color-primary);background:var(--color-bg-secondary)}.sell-image-upload.has-image{padding:0;border-style:solid}.sell-image-source-buttons{display:flex;gap:var(--space-md);width:100%;justify-content:center}.sell-image-source-btn{display:flex;flex-direction:column;align-items:center;gap:var(--space-sm);min-height:auto;min-width:120px;padding:var(--space-lg) var(--space-md);background:var(--color-bg-secondary);border:1px solid var(--color-border);border-radius:var(--radius-lg);color:var(--color-text-secondary);cursor:pointer;transition:all var(--transition-fast)}.sell-image-source-btn:hover{border-color:var(--color-primary);color:var(--color-text);background:var(--color-bg-card)}.sell-image-source-btn span{font-size:var(--font-size-xs);font-weight:500}.sell-image-hint{font-size:var(--font-size-xs);color:var(--color-text-muted);text-align:center}.sell-image-preview{width:100%;max-height:300px;object-fit:contain}.sell-image-upload.has-image{position:relative}.sell-image-overlay{position:absolute;bottom:0;left:0;right:0;display:flex;gap:var(--space-sm);padding:var(--space-sm);background:linear-gradient(transparent,#000000b3);justify-content:center}.sell-image-overlay-btn{display:flex;align-items:center;gap:var(--space-xs);min-height:36px;min-width:auto;padding:var(--space-xs) var(--space-md);background:#ffffff26;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);border:1px solid 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var(--color-border);border-radius:var(--radius-md);color:var(--color-text-secondary)}.listing-btn-icon:hover{color:var(--color-text);background:var(--color-bg-secondary)}.listing-seller{display:flex;align-items:center;gap:var(--space-md)}.listing-seller-avatar{width:48px;height:48px;border-radius:var(--radius-full);background:var(--color-accent);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:var(--font-size-lg);flex-shrink:0}.listing-seller-info{display:flex;flex-direction:column;gap:2px}.listing-seller-info strong{font-size:var(--font-size-base)}.listing-detail-rows{display:flex;flex-direction:column;gap:var(--space-md)}.listing-detail-row{display:flex;align-items:center;gap:var(--space-sm);color:var(--color-text-secondary);font-size:var(--font-size-sm)}.listing-detail-row svg{flex-shrink:0;color:var(--color-text-muted)}.listing-description{margin:0;font-size:var(--font-size-base);line-height:1.7;color:var(--color-text-secondary);white-space:pre-wrap}@media(min-width:640px){.navbar-title{display:inline}.hero{padding:var(--space-2xl) var(--space-xl)}.hero h1{font-size:var(--font-size-3xl)}.products-grid{grid-template-columns:repeat(3,1fr)}.product-info{padding:var(--space-md)}.product-title{font-size:var(--font-size-base)}.footer-inner{flex-direction:row;justify-content:space-between}.listing-title{font-size:var(--font-size-2xl)}}@media(min-width:1024px){.navbar-inner{padding:var(--space-sm) var(--space-xl)}.products-grid{grid-template-columns:repeat(4,1fr)}.product-image-placeholder,.hero h1{font-size:3rem}.listing-layout{flex-direction:row;gap:var(--space-xl)}.listing-image-section{flex:1;max-width:55%;position:sticky;top:80px;align-self:flex-start}.listing-details-section{flex:1;display:flex;flex-direction:column;gap:var(--space-md)}.listing-title{font-size:var(--font-size-3xl)}}@media(min-width:1280px){.products-grid{gap:var(--space-lg)}}@media(max-height:500px)and (orientation:landscape){.hero{padding:var(--space-md)}.hero h1{font-size:var(--font-size-xl)}.products-grid{grid-template-columns:repeat(3,1fr)}}