:root{color-scheme:dark;--bg-deep: #0d1117;--bg-panel: #161b22;--bg-sidebar: #010409;--bg-card: #1c2128;--bg-hover: #21262d;--bg-active: #30363d;--border-subtle: #30363d;--border-strong: #484f58;--text-main: #c9d1d9;--text-muted: #8b949e;--text-bright: #f0f6fc;--accent-blue: #1f6feb;--accent-green: #238636;--accent-green-hover: #2ea043;--accent-red: #da3633;--shadow-sm: 0 1px 0 rgba(1,4,9,.04);--shadow-md: 0 4px 12px rgba(1,4,9,.25);--shadow-lg: 0 8px 24px rgba(1,4,9,.35);font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box;transition:background-color .2s,border-color .2s,box-shadow .2s}body{margin:0;color:var(--text-main);background-color:var(--bg-deep);line-height:1.5}button,input,select,textarea{font:inherit;color:inherit}.app-shell{min-height:100vh;display:grid;grid-template-columns:260px 1fr}.sidebar{background-color:var(--bg-sidebar);border-right:1px solid var(--border-subtle);padding:24px 16px;display:flex;flex-direction:column;gap:32px;position:sticky;top:0;height:100vh}.brand{display:flex;gap:12px;align-items:center;font-size:1.25rem;font-weight:700;color:var(--text-bright)}.brand-mark{display:grid;place-items:center;width:32px;height:32px;border-radius:6px;background:linear-gradient(135deg,var(--accent-blue),#58a6ff);color:#fff;font-size:1.1rem}.sidebar nav{display:grid;gap:4px}.sidebar button{width:100%;color:var(--text-muted);background:transparent;border:1px solid transparent;border-radius:6px;padding:10px 12px;display:flex;align-items:center;gap:12px;cursor:pointer;text-align:left}.sidebar button:hover{color:var(--text-bright);background-color:var(--bg-hover)}.sidebar button.active{color:var(--text-bright);background-color:var(--bg-active);border-color:var(--border-subtle)}.content{padding:40px;display:grid;gap:32px;align-content:start;max-width:1400px;margin:0 auto;width:100%}.footer{margin-top:auto;padding:24px 0 0;border-top:1px solid var(--border-subtle);font-size:.75rem;color:var(--text-muted);text-align:center}.sidebar-bottom{margin-top:auto;display:grid;gap:12px}.sidebar-exit{display:flex;align-items:center;gap:10px;border:0;border-radius:6px;padding:10px 12px;cursor:pointer}.center{text-align:center}.hero-mark{width:48px;height:48px;margin:0 auto 16px;font-size:1.5rem}.page-header{display:flex;justify-content:space-between;align-items:flex-end;border-bottom:1px solid var(--border-subtle);padding-bottom:24px}.page-header h1{margin:0;font-size:2rem;font-weight:700;color:var(--text-bright)}.page-header p{margin:8px 0 0;color:var(--text-muted)}.card,.panel,.metric,.cart{background-color:var(--bg-panel);border:1px solid var(--border-subtle);border-radius:12px;padding:24px;box-shadow:var(--shadow-md)}.card:hover{border-color:var(--border-strong);box-shadow:var(--shadow-lg)}.metric-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}.metric-grid.compact{grid-template-columns:repeat(auto-fit,minmax(150px,1fr))}.metric{display:flex;flex-direction:column;gap:8px}.metric span{font-size:.875rem;color:var(--text-muted);font-weight:500}.metric strong{font-size:2.25rem;font-weight:800;color:var(--text-bright)}.form-stack{display:grid;gap:20px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}label{display:grid;gap:8px;color:var(--text-main);font-size:.875rem;font-weight:500}input,select,textarea{width:100%;border:1px solid var(--border-subtle);border-radius:6px;padding:10px 12px;background-color:var(--bg-deep);color:var(--text-main);outline:none}input:focus,select:focus{border-color:var(--accent-blue);box-shadow:0 0 0 3px #1f6feb33}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:6px;padding:10px 16px;font-weight:600;cursor:pointer;border:1px solid transparent;transition:all .2s}.btn-primary{background-color:var(--accent-green);color:#fff}.btn-primary:hover{background-color:var(--accent-green-hover)}.btn-secondary{background-color:var(--bg-active);border-color:var(--border-subtle);color:var(--text-bright)}.btn-secondary:hover{background-color:var(--bg-hover);border-color:var(--border-strong)}.btn-ghost{background:transparent;color:var(--text-muted)}.btn-ghost:hover{background-color:var(--bg-hover);color:var(--text-bright)}.btn-large{padding:14px 24px;font-size:1.1rem}.pos-grid{display:grid;grid-template-columns:1fr 400px;gap:24px;align-items:start}.search-section{display:flex;gap:12px;margin-bottom:24px}.search-input-wrapper{position:relative;flex:1}.search-input-wrapper input{padding-left:40px;font-size:1.1rem}.search-icon{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--text-muted)}.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:16px}.product-tile{background-color:var(--bg-panel);border:1px solid var(--border-subtle);border-radius:10px;padding:16px;cursor:pointer;display:flex;flex-direction:column;gap:12px}.product-tile:hover{transform:translateY(-2px);border-color:var(--accent-blue);box-shadow:var(--shadow-lg)}.product-tile-img{width:100%;aspect-ratio:1;background-color:var(--bg-deep);border-radius:6px;display:grid;place-items:center;font-size:2rem;color:var(--text-muted)}.product-tile-img img{width:100%;height:100%;object-fit:cover;border-radius:6px}.product-tile-info h3{margin:0;font-size:1rem;color:var(--text-bright)}.product-tile-info .price{font-size:1.25rem;font-weight:700;color:var(--accent-green-hover)}.cart{position:sticky;top:40px;display:flex;flex-direction:column;gap:20px;min-height:calc(100vh - 120px)}.cart-items{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:12px}.cart-item{display:grid;grid-template-columns:1fr 80px 40px;gap:12px;align-items:center;padding-bottom:12px;border-bottom:1px solid var(--border-subtle)}.cart-item.pro{grid-template-columns:minmax(0,1fr) 64px 82px 36px}.cart-item strong,.cart-item small{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}button:disabled,input:disabled{opacity:.45;cursor:not-allowed}.payment-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.cart-totals{display:grid;gap:8px;padding-top:20px;border-top:2px solid var(--border-subtle)}.total-row{display:flex;justify-content:space-between}.total-row.grand-total{font-size:1.5rem;font-weight:800;color:var(--text-bright);margin-top:8px}.text-green{color:var(--accent-green-hover)}.text-blue{color:var(--accent-blue)}.text-red{color:var(--accent-red)}.warning{border-color:#d29922;color:#f0c36a;display:flex;align-items:center;gap:8px}.chart{height:300px;min-width:0}.file-drop{border:1px dashed var(--border-strong);border-radius:10px;padding:18px;display:flex;align-items:center;justify-content:center;gap:10px;color:var(--text-bright);background:var(--bg-deep);cursor:pointer}.file-drop input{display:none}.import-result{background:var(--bg-deep);border:1px solid var(--border-subtle);border-radius:8px;color:var(--text-main);overflow:auto;padding:12px}@media(max-width:1100px){.app-shell{grid-template-columns:1fr}.sidebar{display:none}.pos-grid{grid-template-columns:1fr}}.login-shell{min-height:100vh;display:flex;align-items:center;justify-content:center;background:radial-gradient(circle at top right,#1e293b,var(--bg-deep))}.login-card{width:100%;max-width:400px;background-color:var(--bg-panel);border:1px solid var(--border-subtle);border-radius:16px;padding:40px;box-shadow:var(--shadow-lg);display:flex;flex-direction:column;gap:32px}