:root{--bg:#f4f5f7;--card:#fff;--text:#111317;--muted:#6c727d;--border:#dfe2e7;--black:#0b0b0c;--red:#b51d26;--green:#157f4b;--orange:#d97706;--shadow:0 10px 30px rgba(0,0,0,.07)}
*{box-sizing:border-box}body{margin:0;font-family:Arial,Helvetica,sans-serif;background:var(--bg);color:var(--text)}button,input,select,textarea{font:inherit}button{cursor:pointer}.hidden{display:none!important}
.topbar{background:#0b0b0c;color:white;padding:14px 22px;display:flex;justify-content:space-between;align-items:center;position:sticky;top:0;z-index:20}.brand{display:flex;gap:12px;align-items:center}.brand-mark{width:48px;height:48px;border-radius:10px;background:white;color:#111;display:grid;place-items:center;font-weight:900}.eyebrow,.kicker{font-size:10px;letter-spacing:2px;font-weight:800;color:#9ea3ac}.topbar h1{margin:2px 0 0}.user-area{display:flex;gap:10px;align-items:center}
main{max-width:1240px;margin:auto;padding:18px}.card{background:white;border:1px solid var(--border);border-radius:15px;padding:18px;box-shadow:var(--shadow)}.auth-wrap{min-height:68vh;display:grid;place-items:center}.auth-card{width:min(450px,100%)}.auth-card form,.stack{display:grid;gap:14px}
label{display:flex;flex-direction:column;gap:6px;font-size:13px;font-weight:800}input,select,textarea{width:100%;padding:12px;border:1px solid #cfd3da;border-radius:10px;background:white}button{border:0;border-radius:10px;padding:11px 14px;background:#111;color:white;font-weight:800}button.secondary,.ghost{background:#e7e9ed;color:#15171a}.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.tabs{display:flex;gap:8px;overflow:auto;margin-bottom:14px}.tab{background:#e0e3e7;color:#15171a;white-space:nowrap}.tab.active{background:#111;color:white}.incoming-tab{border:2px solid var(--orange)}.badge{background:var(--orange);color:white;border-radius:999px;padding:2px 6px;font-size:10px}
.summary-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:10px;margin-bottom:18px}.stat{background:white;border:1px solid var(--border);border-radius:13px;padding:15px}.stat span{font-size:27px;font-weight:900;display:block}.stat small{color:var(--muted)}.incoming-stat span{color:var(--orange)}.warn span{color:var(--red)}.money span{font-size:22px}
.toolbar{display:grid;grid-template-columns:minmax(280px,1fr) 210px 210px;gap:10px;margin-bottom:14px}.inventory-list{display:grid;gap:10px}.part-card{background:white;border:1px solid var(--border);border-radius:13px;padding:15px;display:grid;grid-template-columns:1fr auto;gap:14px}.part-card.in-stock{border-left:5px solid var(--green)}.part-card.low{border-left:5px solid var(--red)}.part-name{font-weight:900;font-size:17px}.part-meta,.part-prices,.muted,.message,.hint{color:var(--muted);font-size:13px;line-height:1.5}.qty{font-size:25px;font-weight:900;text-align:right}.qty small{display:block;font-size:10px;color:var(--muted)}
.location-chips{display:flex;gap:6px;flex-wrap:wrap;margin-top:8px}.chip{background:#eef0f3;border-radius:999px;padding:5px 8px;font-size:11px}.incoming-chip{background:#fff3df;color:#9a5500}.actions{display:flex;gap:7px;flex-wrap:wrap;margin-top:10px}.receive{background:var(--green)}.bulk-receive{background:var(--orange)}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:12px;margin-bottom:12px}.section-head h2{margin:0 0 4px}.section-head p{margin:0;color:var(--muted);font-size:13px}
.po-card{background:white;border:1px solid var(--border);border-radius:15px;padding:18px;margin-bottom:14px}.po-head{display:flex;justify-content:space-between;gap:15px;align-items:flex-start}.po-title{font-size:22px;font-weight:900}.po-head-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap;justify-content:flex-end}.status-pill{border-radius:999px;padding:6px 10px;font-size:11px;font-weight:900;background:#fff3df;color:#9a5500}.po-metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin:14px 0}.mini-stat{background:#f6f7f9;border-radius:10px;padding:10px}.mini-stat b{display:block;font-size:19px}.po-item{display:grid;grid-template-columns:minmax(0,1fr) 90px 110px auto;gap:10px;align-items:center;padding:10px 0;border-top:1px solid var(--border)}.po-item .incoming-num{font-weight:900;color:var(--orange)}.po-item button{padding:8px 10px;font-size:12px}
.scan-layout,.management-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.reader{min-height:300px;border:2px dashed #bbb;border-radius:14px}.scan-controls,.manual-scan{display:flex;gap:8px;margin-top:12px}.manual-scan input{flex:1}.scan-result-placeholder{min-height:300px}.manage-item,.history-item{padding:12px 0;border-bottom:1px solid var(--border)}.manage-item{display:flex;justify-content:space-between;gap:10px}
dialog{border:0;border-radius:16px;max-width:560px;width:calc(100% - 28px);box-shadow:0 25px 90px rgba(0,0,0,.35)}dialog::backdrop{background:rgba(0,0,0,.55)}dialog form{display:grid;gap:15px}.dialog-head{display:flex;justify-content:space-between;gap:10px}.icon-btn{background:#eceef1;color:#111;font-size:22px;padding:5px 10px}.qty-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px}.qty-mode{background:#e5e7eb;color:#111}.qty-mode.active.danger{background:var(--red);color:white}.qty-mode.active.success{background:var(--green);color:white}.warning-box{background:#fff3df;border:1px solid #f1c785;border-radius:10px;padding:12px;color:#7a4500;font-size:13px}
.empty-state{background:white;border:1px dashed #cfd3da;border-radius:14px;padding:36px;text-align:center;color:var(--muted)}
@media(max-width:1000px){.summary-grid{grid-template-columns:repeat(3,1fr)}.scan-layout,.management-grid{grid-template-columns:1fr}}
@media(max-width:760px){main{padding:12px}.summary-grid{grid-template-columns:repeat(2,1fr)}.toolbar{grid-template-columns:1fr}.part-card{grid-template-columns:1fr}.po-item{grid-template-columns:1fr 70px 90px}.po-item button{grid-column:1/-1}.po-metrics{grid-template-columns:repeat(2,1fr)}.user-area span{display:none}.po-head{flex-direction:column}.po-head-actions{justify-content:flex-start}}