:root{--color-primary: #6366f1;--color-primary-dark: #4f46e5;--color-secondary: #ec4899;--color-accent: #14b8a6;--bg-gradient-start: #0f172a;--bg-gradient-end: #1e293b;--bg-card: rgba(30, 41, 59, .8);--bg-card-hover: rgba(51, 65, 85, .9);--text-primary: #f8fafc;--text-secondary: #94a3b8;--text-muted: #64748b;--border-color: rgba(148, 163, 184, .2);--border-radius: 12px;--border-radius-lg: 20px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);--shadow-md: 0 4px 6px rgba(0, 0, 0, .4);--shadow-lg: 0 10px 20px rgba(0, 0, 0, .5);--shadow-glow: 0 0 40px rgba(99, 102, 241, .3);--spacing-xs: 4px;--spacing-sm: 8px;--spacing-md: 16px;--spacing-lg: 24px;--spacing-xl: 32px;--font-sans: "Inter", -apple-system, BlinkMacSystemFont, sans-serif}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-font-smoothing:antialiased}body{font-family:var(--font-sans);background:linear-gradient(135deg,var(--bg-gradient-start),var(--bg-gradient-end));min-height:100vh;color:var(--text-primary);line-height:1.6}.app{max-width:1200px;margin:0 auto;padding:var(--spacing-lg)}.header{text-align:center;padding:var(--spacing-xl) 0;margin-bottom:var(--spacing-xl)}.header-content{display:flex;flex-direction:column;align-items:center;gap:var(--spacing-sm)}.logo{font-size:2.5rem;font-weight:700;background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;display:flex;align-items:center;gap:var(--spacing-sm)}.logo-icon{font-size:2rem;-webkit-text-fill-color:initial}.tagline{color:var(--text-secondary);font-size:1.1rem}.search-form{background:var(--bg-card);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid var(--border-color);border-radius:var(--border-radius-lg);padding:var(--spacing-lg);margin-bottom:var(--spacing-xl);box-shadow:var(--shadow-lg)}.search-row{margin-bottom:var(--spacing-lg)}.search-input-wrapper{display:flex;gap:var(--spacing-md)}.search-input{flex:1;padding:var(--spacing-md) var(--spacing-lg);font-size:1.1rem;border:2px solid var(--border-color);border-radius:var(--border-radius);background:#0f172a99;color:var(--text-primary);transition:all .2s ease}.search-input:focus{outline:none;border-color:var(--color-primary);box-shadow:var(--shadow-glow)}.search-input::placeholder{color:var(--text-muted)}.search-button{padding:var(--spacing-md) var(--spacing-xl);font-size:1rem;font-weight:600;background:linear-gradient(135deg,var(--color-primary),var(--color-primary-dark));color:#fff;border:none;border-radius:var(--border-radius);cursor:pointer;transition:all .2s ease}.search-button:hover:not(:disabled){transform:translateY(-2px);box-shadow:var(--shadow-glow)}.search-button:disabled{opacity:.6;cursor:not-allowed}.filters-row{display:flex;flex-wrap:wrap;gap:var(--spacing-lg)}.filter-group{display:flex;flex-direction:column;gap:var(--spacing-xs)}.filter-label{font-size:.85rem;font-weight:500;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.05em}.filter-select{padding:var(--spacing-sm) var(--spacing-md);font-size:.95rem;border:1px solid var(--border-color);border-radius:var(--border-radius);background:#0f172a99;color:var(--text-primary);cursor:pointer;min-width:150px}.filter-select:focus{outline:none;border-color:var(--color-primary)}.store-buttons{display:flex;gap:var(--spacing-sm);flex-wrap:wrap}.store-button{padding:var(--spacing-sm) var(--spacing-md);font-size:.9rem;border:1px solid var(--border-color);border-radius:var(--border-radius);background:transparent;color:var(--text-secondary);cursor:pointer;transition:all .2s ease}.store-button:hover{border-color:var(--color-primary);color:var(--text-primary)}.store-button.active{background:var(--color-primary);border-color:var(--color-primary);color:#fff}.results{margin-top:var(--spacing-xl)}.results-count{color:var(--text-secondary);margin-bottom:var(--spacing-lg)}.products-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:var(--spacing-lg)}.product-card{background:var(--bg-card);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid var(--border-color);border-radius:var(--border-radius);padding:var(--spacing-lg);cursor:pointer;transition:all .3s ease}.product-card:hover{background:var(--bg-card-hover);transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--color-primary)}.product-header{display:flex;gap:var(--spacing-sm);margin-bottom:var(--spacing-md);flex-wrap:wrap}.store-badge{background:linear-gradient(135deg,var(--color-accent),#0d9488);color:#fff;padding:var(--spacing-xs) var(--spacing-sm);border-radius:6px;font-size:.75rem;font-weight:600;text-transform:uppercase}.category-badge{background:#6366f133;color:var(--color-primary);padding:var(--spacing-xs) var(--spacing-sm);border-radius:6px;font-size:.75rem}.product-name{font-size:1.1rem;font-weight:600;margin-bottom:var(--spacing-xs);line-height:1.4}.product-brand{color:var(--text-secondary);font-size:.9rem;margin-bottom:var(--spacing-xs)}.product-size{color:var(--text-muted);font-size:.85rem;margin-bottom:var(--spacing-md)}.product-prices{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:var(--spacing-md)}.total-price{font-size:1.5rem;font-weight:700;color:var(--text-primary)}.unit-price{font-size:1rem;color:var(--color-accent);font-weight:600}.view-history-btn{width:100%;padding:var(--spacing-sm);background:transparent;border:1px solid var(--border-color);border-radius:var(--border-radius);color:var(--text-secondary);font-size:.9rem;cursor:pointer;transition:all .2s ease}.view-history-btn:hover{border-color:var(--color-primary);color:var(--color-primary)}.loading,.empty-state{text-align:center;padding:var(--spacing-xl) * 2;color:var(--text-secondary)}.spinner{width:40px;height:40px;border:3px solid var(--border-color);border-top-color:var(--color-primary);border-radius:50%;margin:0 auto var(--spacing-md);animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.error-message{background:#ef44441a;border:1px solid rgba(239,68,68,.3);color:#f87171;padding:var(--spacing-md);border-radius:var(--border-radius);text-align:center;margin-bottom:var(--spacing-lg)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000c;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;padding:var(--spacing-lg);z-index:100;animation:fadeIn .2s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.modal-content{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--border-radius-lg);padding:var(--spacing-xl);max-width:500px;width:100%;position:relative;animation:slideUp .3s ease}@keyframes slideUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}.modal-close{position:absolute;top:var(--spacing-md);right:var(--spacing-md);width:32px;height:32px;background:transparent;border:1px solid var(--border-color);border-radius:50%;color:var(--text-secondary);font-size:1.5rem;cursor:pointer;display:flex;align-items:center;justify-content:center;line-height:1}.modal-close:hover{background:#ef444433;border-color:#ef4444;color:#ef4444}.modal-title{font-size:1.3rem;font-weight:600;margin-bottom:var(--spacing-xs);padding-right:40px}.modal-subtitle{color:var(--text-secondary);margin-bottom:var(--spacing-lg)}.price-chart{background:#0f172a99;border-radius:var(--border-radius);padding:var(--spacing-md);margin-bottom:var(--spacing-lg)}.chart-header{display:flex;justify-content:space-between;font-size:.85rem;color:var(--text-muted);margin-bottom:var(--spacing-sm)}.sparkline{width:100%;height:80px}.chart-dates{display:flex;justify-content:space-between;font-size:.8rem;color:var(--text-muted);margin-top:var(--spacing-sm)}.history-loading,.history-error,.no-history{text-align:center;padding:var(--spacing-xl);color:var(--text-secondary)}.history-error{color:#f87171}.history-summary{display:flex;gap:var(--spacing-lg);justify-content:center}.summary-item{text-align:center}.summary-label{display:block;font-size:.85rem;color:var(--text-muted);margin-bottom:var(--spacing-xs)}.summary-value{font-size:1.2rem;font-weight:600;color:var(--color-accent)}@media(max-width:640px){.app{padding:var(--spacing-md)}.logo{font-size:2rem}.search-input-wrapper,.filters-row{flex-direction:column}.filter-group,.filter-select{width:100%}}