:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media(prefers-color-scheme:light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}.sidebar{width:220px;height:100vh;background:linear-gradient(180deg,#0f172a,#020617);color:#e5e7eb;display:flex;flex-direction:column;padding:20px 16px;transition:width .25s ease,padding .25s ease}.sidebar-header{margin-bottom:24px}.logo-wrapper{display:flex;align-items:center;gap:12px;justify-content:flex-start}.sidebar.collapsed .logo-wrapper{justify-content:center}.logo-icon{width:36px;height:36px;background:linear-gradient(135deg,#6366f1,#8b5cf6);border-radius:10px;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px}.logo-text{font-size:20px;font-weight:600;white-space:nowrap}.sidebar-menu{display:flex;flex-direction:column;gap:8px;flex:1}.menu-item{display:flex;align-items:center;gap:12px;padding:10px 14px;border-radius:10px;color:#cbd5f5;background:transparent;border:none;cursor:pointer;text-align:left;text-decoration:none;transition:background .2s ease,color .2s ease}.menu-item svg{font-size:18px}.menu-item:hover{background:#6366f126}.menu-item.active{background:#4f46e5;color:#fff}.collapse-toggle{color:#cbd5f5}.sidebar.collapsed{width:64px;padding:16px 8px}.sidebar.collapsed .menu-item{justify-content:center;padding:10px 0}.sidebar.collapsed .menu-item span{display:none}@media(max-width:768px){.sidebar{padding:16px 10px}.sidebar.collapsed{width:56px;padding:12px 6px}.logo-text{font-size:18px}}.bill-page{background:#f8fafc;min-height:100vh;padding:20px;display:flex;justify-content:center}.bill-card{background:#fff;width:100%;max-width:900px;border-radius:20px;padding:28px;box-shadow:0 10px 30px #0000000f}.form-input{padding:12px 14px;border-radius:14px;border:1px solid #e5e7eb;font-size:14px;background:#fff}.form-input:focus{outline:none;border-color:#6366f1;box-shadow:0 0 0 3px #6366f126}.bill-header{display:flex;justify-content:space-between;gap:24px}.bill-header-left{display:flex;flex-direction:column;gap:10px}.bill-no{display:flex;align-items:center;gap:6px}.bill-prefix{font-size:36px;font-weight:800;color:#1f2937}.bill-no-input{width:120px;font-size:36px;font-weight:800;padding:6px 10px}.supplier-input{max-width:320px}.bill-header-right input{max-width:200px}.bill-item{display:grid;grid-template-columns:2.5fr 1fr 1fr 1fr;gap:16px;align-items:center;margin-bottom:12px}.bill-item.header{font-weight:600;color:#6b7280}.item-total{text-align:right;font-weight:600}.discount-row{display:grid;grid-template-columns:120px 1fr;gap:16px;align-items:center}.discount-input{max-width:240px}.bill-summary{max-width:320px;margin-left:auto}.bill-summary div{display:flex;justify-content:space-between;margin-bottom:10px}.bill-summary .total{font-size:18px;font-weight:700}.bill-actions{display:flex;justify-content:flex-end;margin-top:28px}.bill-actions button{padding:14px 26px;border-radius:16px;background:#4f46e5;color:#fff;border:none;font-size:15px}.item-field{display:flex;flex-direction:column;gap:4px}.mobile-label{display:none;font-size:12px;color:#6b7280;font-weight:500}@media(max-width:768px){.mobile-label{display:block}.bill-header{flex-direction:column;gap:16px}.bill-no-input{width:100%;font-size:32px}.supplier-input,.bill-header-right input,.discount-input{max-width:100%}.bill-item{grid-template-columns:1fr;gap:12px}.bill-item.header{display:none}.item-total{text-align:left}.bill-summary{margin-left:0}.form-input{padding:14px 16px}}