:root{--nen: #f6f7f9;--the: #fff;--vien: #e3e6eb;--chu: #1c2330;--mo: #6b7280;--chinh: #1d4ed8;--chinh-nhat: #e8efff;--do: #dc2626;--do-nhat: #fee2e2;--xanh: #15803d;--xanh-nhat: #dcfce7;--vang-nhat: #fef3c7;--bo: 12px;--bottom: 64px}*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--nen);color:var(--chu);font:16px/1.45 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;-webkit-tap-highlight-color:transparent}a{color:var(--chinh);text-decoration:none}h1{font-size:1.35rem;margin:0}h2{font-size:1rem;margin:20px 0 8px;color:#374151}button,input,select,textarea{font:inherit;color:inherit}input,select,textarea{width:100%;padding:10px 12px;border:1px solid var(--vien);border-radius:10px;background:#fff;min-height:44px}input:focus,select:focus,textarea:focus{outline:2px solid 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8px;cursor:pointer}.btns{display:flex;gap:8px;flex-wrap:wrap}.link{background:none;border:0;color:var(--chinh);padding:0;cursor:pointer;font-weight:600}.fab{position:fixed;right:20px;bottom:calc(var(--bottom) + 20px);width:60px;height:60px;border-radius:50%;background:var(--chinh);color:#fff;font-size:2rem;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 20px #1d4ed866;z-index:9}@media(min-width:800px){.fab{display:none}}.seg,.tabs{display:flex;gap:4px;background:#eef0f3;padding:4px;border-radius:10px;overflow-x:auto}.seg button,.tabs button{flex:1;border:0;background:transparent;padding:8px 12px;border-radius:8px;cursor:pointer;white-space:nowrap;color:#374151}.seg button.on,.tabs button.on{background:#fff;font-weight:600;box-shadow:0 1px 3px #00000014;color:var(--chinh)}.form{display:flex;flex-direction:column;gap:14px}.field{display:flex;flex-direction:column;gap:6px}.field-label{font-size:.85rem;font-weight:600;color:#374151}.field-hint{font-size:.8rem;color:var(--mo)}.form-actions{display:flex;gap:8px;justify-content:flex-end;margin-top:8px;position:sticky;bottom:calc(var(--bottom) + 8px);background:var(--nen);padding:8px 0}.form-actions .btn{flex:1}@media(min-width:800px){.form-actions .btn{flex:0 0 auto}}.check{display:flex;align-items:center;gap:8px}.inline{display:flex;gap:8px;align-items:center}.chips{display:grid;grid-template-columns:repeat(auto-fill,minmax(96px,1fr));gap:8px}.chip{min-height:48px;border:1.5px solid var(--vien);border-radius:10px;background:#fff;font-weight:600;cursor:pointer;padding:8px}.chip-on{border-color:var(--chinh);background:var(--chinh-nhat);color:var(--chinh)}.tien-input{display:flex;align-items:center;gap:8px}.tien-input 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var(--vien);border-radius:var(--bo)}.tong{display:flex;gap:16px;flex-wrap:wrap;font-size:.9rem;color:var(--mo);padding:4px 0}.alert{background:var(--vang-nhat);border-radius:10px;padding:10px 12px;font-size:.9rem}.alert-loi{background:var(--do-nhat);color:#991b1b}.alert-ok{background:var(--xanh-nhat);color:var(--xanh)}.code{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:1.3rem;background:#eef0f3;padding:10px;border-radius:8px;text-align:center;-webkit-user-select:all;user-select:all}.table-wrap{overflow-x:auto;background:var(--the);border:1px solid var(--vien);border-radius:var(--bo)}.table{border-collapse:collapse;width:100%;font-size:.9rem}.table th,.table td{padding:8px 10px;border-bottom:1px solid var(--vien);text-align:left;vertical-align:top;white-space:nowrap}.table thead th{background:#f3f4f6;font-size:.8rem;color:#374151;position:sticky;top:0}.table tfoot td,.table tfoot th{background:#f3f4f6}.table td.small{white-space:normal;max-width:320px}.table select,.table 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