:root{--ink:#17202a;--muted:#6b7280;--line:#e6eaf0;--canvas:#f5f7fa;--card:#fff;--brand:#155e75;--brand-dark:#0e4a5d;--accent:#f59e0b;--danger:#dc2626}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:var(--canvas);font-family:Inter,"Noto Sans Myanmar",system-ui,sans-serif;font-size:14px}.app-shell{min-height:100vh;display:grid;grid-template-columns:230px 1fr}.sidebar{background:#102a35;color:#d8e4e8;display:flex;flex-direction:column;padding:24px 14px}.brand{display:flex;align-items:center;gap:10px;padding:0 9px 28px;font-size:20px;color:white}.brand-mark{display:grid;place-items:center;width:31px;height:31px;border-radius:9px;background:#fbbf24;color:#102a35;font-weight:800}.sidebar nav{display:grid;gap:5px}.nav-item{border:0;background:transparent;color:#bdd0d6;text-align:left;padding:12px 13px;border-radius:8px;font:inherit;font-size:15px;cursor:pointer;display:flex;gap:12px}.nav-item.active,.nav-item:hover{color:#fff;background:#1d4857}.sidebar-footer{margin-top:auto;border-top:1px solid #28505d;padding:17px 9px 2px;font-size:12px;display:flex;align-items:center;gap:8px}.status-dot{width:8px;height:8px;border-radius:100%;background:#f59e0b}.status-dot.online{background:#4ade80}main{min-width:0}header{height:88px;background:#fff;border-bottom:1px solid var(--line);padding:16px 34px;display:flex;align-items:center;justify-content:space-between}h1,h2,p{margin:0}h1{font-size:22px}h2{font-size:17px}header p,.section-heading p{margin-top:4px;color:var(--muted);font-size:12px}.header-actions,.settings-actions,.dialog-actions{display:flex;gap:9px;align-items:center}button,.file-button{font:inherit;cursor:pointer}.primary,.secondary{border-radius:8px;padding:10px 14px;font-weight:650;border:1px solid transparent}.primary{background:var(--brand);color:#fff}.primary:hover{background:var(--brand-dark)}.secondary,.file-button{background:#fff;border-color:#d5dce5;color:#354151}.page{display:none;padding:27px 34px}.page.active{display:block}.pos-layout{display:grid;grid-template-columns:minmax(0,1fr) 350px;gap:20px;min-height:calc(100vh - 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30px));border:0;border-radius:12px;padding:0;box-shadow:0 18px 55px #0004}dialog::backdrop{background:#102a3580}dialog form,.payment-dialog{padding:22px}.dialog-heading{display:flex;justify-content:space-between;align-items:center}.icon-button{border:0;background:transparent;font-size:25px;color:#6b7280}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 14px}.dialog-actions{justify-content:flex-end;margin-top:21px}.change-due{color:var(--brand);font-weight:700;margin-top:10px}#toast{position:fixed;bottom:23px;right:23px;background:#172a32;color:#fff;padding:12px 16px;border-radius:8px;box-shadow:0 7px 22px #0003;transform:translateY(90px);opacity:0;transition:.2s;z-index:10}#toast.show{transform:translateY(0);opacity:1}@media(max-width:900px){.app-shell{grid-template-columns:65px 1fr}.brand{padding:0 2px 28px}.brand>span:last-child,.nav-item span,.sidebar-footer span:last-child{display:none}.nav-item{justify-content:center;padding:13px 5px}.sidebar{padding:24px 8px}.sidebar-footer{justify-content:center}.pos-layout{grid-template-columns:1fr}.cart-panel{min-height:400px}.two-column{grid-template-columns:1fr}}@media(max-width:620px){.app-shell{display:block}.sidebar{position:fixed;z-index:5;bottom:0;left:0;right:0;height:59px;padding:5px;background:#102a35}.brand,.sidebar-footer{display:none}.sidebar nav{display:flex;justify-content:space-around}.nav-item{padding:8px}.nav-item span{display:block;font-size:10px}.page{padding:16px}.page.active{padding-bottom:75px}header{height:auto;padding:13px 16px}.header-actions .secondary{display:none}.header-actions .primary{font-size:12px;padding:9px}.toolbar{flex-direction:column}.toolbar select{height:38px}.product-grid{grid-template-columns:repeat(2,1fr)}.stat-grid,.stats-row{grid-template-columns:1fr}.form-grid{grid-template-columns:1fr}.section-heading{align-items:flex-start;gap:8px}.section-heading .primary{white-space:nowrap}.cart-item{grid-template-columns:1fr auto auto}.cart-item .remove{grid-column:4}.cart-panel{min-height:330px}}