:root{--bg: #0a0a0f;--card-bg: rgba(17, 17, 23, .8);--card-border: rgba(255, 255, 255, .08);--text: #f5f5f5;--text-light: #9ca3af;--border: #2a2a35;--primary: #6366f1;--primary-dark: #4f46e5;--primary-light: #818cf8;--success: #10b981;--error: #ef4444;--accent: #a855f7;--glass-bg: rgba(255, 255, 255, .03);--glass-border: rgba(255, 255, 255, .06);--shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .4), 0 2px 4px -2px rgba(0, 0, 0, .3);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .5), 0 4px 6px -4px rgba(0, 0, 0, .4)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Inter,-apple-system,sans-serif;background:var(--bg);background-image:radial-gradient(ellipse at top,rgba(99,102,241,.08) 0%,transparent 50%),radial-gradient(ellipse at bottom right,rgba(168,85,247,.06) 0%,transparent 50%);color:var(--text);line-height:1.6;min-height:100vh;transition:background .3s,color .3s}.app{min-height:100vh}.navbar{background:var(--card-bg);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);padding:1rem 2rem;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--card-border);box-shadow:var(--shadow-sm);position:sticky;top:0;z-index:100}.navbar h1{font-size:1.5rem;font-weight:700;background:linear-gradient(135deg,var(--primary-light) 0%,var(--primary) 50%,var(--accent) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:-.02em}.logout-btn{background:transparent;border:1px solid var(--card-border);padding:.625rem 1.25rem;border-radius:10px;cursor:pointer;color:var(--text-light);font-weight:500;font-size:.875rem;transition:all .2s ease}.logout-btn:hover{background:#ef44441a;color:var(--error);border-color:#ef44444d;transform:translateY(-1px)}.container{max-width:1200px;margin:0 auto;padding:2rem}.card{background:var(--card-bg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-radius:20px;padding:2rem;border:1px solid var(--card-border);box-shadow:var(--shadow-md)}.login-page{display:flex;justify-content:center;align-items:center;min-height:calc(100vh - 72px);background:linear-gradient(135deg,var(--bg) 0%,rgba(17,17,23,.5) 100%);padding:1rem}.login-form{width:100%;max-width:400px}.login-form h2{margin-bottom:.5rem;text-align:center;font-size:1.875rem;font-weight:700;background:linear-gradient(135deg,var(--primary-light) 0%,var(--primary) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.form-group{margin-bottom:1.25rem}.form-group label{display:block;margin-bottom:.625rem;font-weight:600;font-size:.875rem;color:var(--text-light);letter-spacing:.01em}.form-group input,.form-group select{width:100%;padding:.875rem 1rem;border:1.5px solid var(--border);border-radius:12px;font-size:1rem;background:var(--glass-bg);color:var(--text);transition:border-color .2s ease,box-shadow .2s ease,background .2s ease}.form-group input:focus,.form-group select:focus{outline:none;border-color:var(--primary);background:#6366f10d;box-shadow:0 0 0 4px #6366f126}.form-group input::placeholder{color:var(--text-light);opacity:.6}.btn{width:100%;padding:.875rem;background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);color:#fff;border:none;border-radius:12px;font-size:1rem;font-weight:600;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease,background .2s ease;box-shadow:0 4px 12px #6366f14d}.btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px 20px #6366f166;background:linear-gradient(135deg,var(--primary-light) 0%,var(--primary) 100%)}.btn:active:not(:disabled){transform:translateY(0)}.btn:disabled{opacity:.5;cursor:not-allowed;box-shadow:none}.header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem;gap:1rem;flex-wrap:wrap}.header h2{font-size:1.625rem;font-weight:700;letter-spacing:-.02em}.add-btn{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);color:#fff;border:none;padding:.625rem 1.25rem;border-radius:10px;cursor:pointer;text-decoration:none;font-weight:600;font-size:.875rem;transition:all .2s ease;box-shadow:0 2px 8px #6366f140;display:inline-flex;align-items:center;justify-content:center;gap:.5rem}.add-btn:hover{background:linear-gradient(135deg,var(--primary-light) 0%,var(--primary) 100%);transform:translateY(-1px);box-shadow:0 4px 12px #6366f159}.add-btn:active{transform:translateY(0)}.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem}.product-card{background:var(--card-bg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-radius:20px;padding:1.5rem;border:1px solid var(--card-border);box-shadow:var(--shadow-md);transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;position:relative;overflow:hidden}.product-card:before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(255,255,255,.1),transparent);opacity:0;transition:opacity .3s ease}.product-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:#6366f133}.product-card:hover:before{opacity:1}.product-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:.75rem}.product-name{font-weight:600;font-size:1.125rem;line-height:1.4;letter-spacing:-.01em}.product-badge{font-size:.7rem;padding:.3rem .6rem;border-radius:20px;background:var(--primary);color:#fff;font-weight:600;letter-spacing:.02em;text-transform:uppercase;box-shadow:0 2px 4px #0003}.product-meta{color:var(--text-light);font-size:.875rem;margin-bottom:.75rem}.product-price{font-size:1.25rem;font-weight:600;color:#e5e5e5;letter-spacing:-.01em}.product-last-updated{font-size:.75rem;color:var(--text-light);margin-top:1rem;padding-top:1rem;border-top:1px solid var(--card-border);font-weight:500}.chart-container{margin-top:2rem}.chart-card{background:var(--card-bg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-radius:20px;padding:2rem;border:1px solid var(--card-border);box-shadow:var(--shadow-md)}.chart-card h3{margin-bottom:1rem;font-size:1.375rem;font-weight:700;letter-spacing:-.01em}.time-range-btns{display:flex;gap:0;border:1px solid var(--card-border);border-radius:10px;overflow:hidden;background:var(--glass-bg)}.time-range-btn{background:transparent;border:none;color:var(--text-light);cursor:pointer;padding:.5rem .75rem;font-size:.8rem;font-weight:600;transition:all .15s ease;border-right:1px solid var(--card-border)}.time-range-btn:last-child{border-right:none}.time-range-btn.active{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);color:#fff;box-shadow:0 2px 8px #6366f14d}.time-range-btn:not(.active):hover{background:#ffffff14;color:var(--text)}.product-select{width:100%;padding:.875rem 1rem;border:1.5px solid var(--border);border-radius:12px;font-size:1rem;background:var(--glass-bg);color:var(--text);margin-bottom:1.5rem;cursor:pointer;transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;font-weight:500}.product-select:focus{outline:none;border-color:var(--primary);background:#6366f10d;box-shadow:0 0 0 4px #6366f126}.error{background:linear-gradient(135deg,#ef44441a,#ef44440d);color:var(--error);padding:1rem 1.25rem;border-radius:12px;margin-bottom:1rem;border:1px solid rgba(239,68,68,.2);font-weight:500;font-size:.9rem}.loading{text-align:center;padding:4rem 2rem;color:var(--text-light);font-size:1.125rem;font-weight:500}.empty-state{text-align:center;padding:4rem 2rem;color:var(--text-light);font-size:1rem;font-weight:500}.empty-state a{color:var(--primary);text-decoration:none;font-weight:600;transition:color .2s ease}.empty-state a:hover{color:var(--primary-light);text-decoration:underline}.product-table-wrap{overflow-x:auto;border-radius:16px;border:1px solid var(--card-border);background:var(--card-bg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);box-shadow:var(--shadow-md)}.product-table{width:100%;border-collapse:collapse;font-size:.9rem}.product-table thead th{padding:1rem 1.25rem;text-align:left;font-weight:600;font-size:.75rem;text-transform:uppercase;letter-spacing:.08em;color:var(--text-light);border-bottom:1px solid var(--card-border);white-space:nowrap;-webkit-user-select:none;user-select:none;background:var(--glass-bg)}.product-table thead th:hover{color:var(--text);background:#ffffff0a}.product-table tbody tr{border-bottom:1px solid var(--card-border);transition:background .15s ease}.product-table tbody tr:last-child{border-bottom:none}.product-table tbody tr:hover{background:#6366f10f}.product-table tbody tr.table-selected{background:#6366f11a;border-left:3px solid var(--primary)}.product-table tbody tr.table-selected:hover{background:#6366f124}.product-table td{padding:.875rem 1.25rem;vertical-align:middle;font-size:.9rem}.table-action-btn{background:none;border:none;color:var(--text-light);cursor:pointer;padding:4px;line-height:1;font-size:.85rem;border-radius:4px;display:inline-flex;align-items:center;justify-content:center;text-decoration:none;transition:color .15s,background .15s}.table-action-btn:hover{color:var(--text);background:#ffffff14}.view-toggle{display:flex;border:1px solid var(--border);border-radius:8px;overflow:hidden}.view-toggle-btn{background:transparent;border:none;color:var(--text-light);cursor:pointer;padding:.5rem .65rem;display:flex;align-items:center;transition:all .15s}.view-toggle-btn.active{background:var(--primary);color:#fff}.view-toggle-btn:not(.active):hover{background:#ffffff0f}@media (max-width: 640px){.container{padding:1rem}.product-grid{grid-template-columns:1fr}.header{flex-direction:column;gap:1rem;align-items:stretch}.header h2{font-size:1.25rem}.header>div{flex-direction:column;align-items:stretch}.add-btn{width:100%;justify-content:center}.view-toggle{width:100%}.view-toggle-btn{flex:1}.time-range-btns{flex-wrap:wrap}.time-range-btn{flex:1;min-width:50px}.product-table-wrap{border-radius:12px}.product-table thead th{padding:.75rem;font-size:.7rem}.product-table td{padding:.75rem;font-size:.85rem}.chart-card{padding:1.25rem}.chart-card h3{font-size:1.125rem}.product-card{padding:1.25rem}.product-name{font-size:1rem}.product-price{font-size:1.125rem}}@media (max-width: 480px){.navbar{padding:.75rem 1rem}.navbar h1{font-size:1.25rem}.logout-btn{padding:.5rem 1rem;font-size:.8rem}.header h2{font-size:1.125rem}.product-table thead th:nth-child(4),.product-table tbody td:nth-child(4){display:none}.product-table thead th:nth-child(5),.product-table tbody td:nth-child(5){width:60px}.time-range-btn{padding:.4rem .6rem;font-size:.75rem}}.skeleton{background:linear-gradient(90deg,var(--glass-bg) 25%,rgba(255,255,255,.08) 50%,var(--glass-bg) 75%);background-size:200% 100%;animation:skeleton-loading 1.5s ease-in-out infinite;border-radius:8px}@keyframes skeleton-loading{0%{background-position:200% 0}to{background-position:-200% 0}}.skeleton-card{pointer-events:none}.skeleton-header{height:1.5rem;width:70%;margin-bottom:.75rem}.skeleton-badge{height:1.25rem;width:3rem;border-radius:20px}.skeleton-meta{height:.875rem;width:40%;margin-bottom:.75rem}.skeleton-price{height:1.5rem;width:5rem;margin-bottom:1rem}.skeleton-footer{height:.75rem;width:60%}.skeleton-text{height:1rem;width:80%}.skeleton-badge-sm{height:1rem;width:2.5rem;border-radius:20px}.skeleton-price-sm{height:1rem;width:3rem}.skeleton-date{height:.875rem;width:5rem}.skeleton-actions{height:1.25rem;width:2rem}.skeleton-btn{height:2.25rem;width:8rem;border-radius:10px}