:root{--mint:#B7F7D4;--green:#0f6b45;--ink:#10231a;--line:#cfe8da;--bg:#f4fcf8}*{box-sizing:border-box}body{margin:0;font-family:system-ui,Segoe UI,Roboto,sans-serif;color:var(--ink);background:var(--bg)}header{background:var(--mint);padding:10px 16px;display:flex;justify-content:space-between;align-items:center;gap:8px;flex-wrap:wrap}header b{font-size:18px}main{max-width:980px;margin:0 auto;padding:16px;display:flex;gap:16px;flex-wrap:wrap}.card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px;flex:1 1 320px}h2{margin:0 0 12px;font-size:17px}label{display:block;font-size:13px;margin:10px 0 4px}input,select{width:100%;padding:10px;border:1px solid #b9d6c6;border-radius:8px;font-size:16px;background:#fff}input:disabled{background:#eef5f1}button{background:var(--green);color:#fff;border:0;border-radius:8px;padding:11px 16px;font-size:16px;cursor:pointer}button.ghost{background:transparent;color:var(--ink);border:1px solid #9cc7b0}button:disabled{opacity:.6}.row{display:flex;gap:8px;align-items:end}.row>div{flex:1}.err{color:#b00020;margin:8px 0}.muted{color:#5b7466;font-size:13px}table{width:100%;border-collapse:collapse;font-size:14px}td,th{text-align:left;padding:6px 4px;border-bottom:1px solid var(--line)}tr.click{cursor:pointer}.void{text-decoration:line-through;color:#999}.center{max-width:360px;margin:12vh auto;padding:0 16px}.receipt{font-family:ui-monospace,Consolas,monospace;font-size:13px;border:1px dashed #7aa890;padding:12px;margin-bottom:12px;background:#fff;position:relative}.receipt h3{margin:0;text-align:center}.receipt .c{text-align:center}.receipt .line{display:flex;justify-content:space-between;gap:8px;margin:3px 0}.receipt .big{font-size:18px;font-weight:700}.receipt .stamp{position:absolute;inset:40% 0 auto;text-align:center;font-size:34px;color:#b00020;transform:rotate(-15deg);opacity:.6}@media print{@page{margin:4mm}body *{visibility:hidden}.receipt,.receipt *{visibility:visible}.receipt{position:absolute;left:0;top:0;width:76mm;border:0;padding:0}}.tabs{max-width:980px;margin:12px auto 0;padding:0 16px;display:flex;gap:8px}.tabs button.on{background:var(--green);color:#fff}button.sm{padding:4px 10px;font-size:13px}.chk{display:flex;gap:8px;align-items:center;margin:8px 0}.chk input{width:auto}.ok{color:var(--green)}