:root{--navy:#1f2a44;--navy2:#2e3d63;--gold:#b08d3c;--gold-soft:#efe3c2;--cream:#f7f3ea;--paper:#fffdf8;--line:#ddd3bd;--ink:#26221b;--muted:#6b6354;--ok:#2f6b3f;--bad:#8e2b2b}*{box-sizing:border-box}body{margin:0;font-family:Georgia,Times New Roman,"Noto Serif Bengali",serif;background:var(--cream);color:var(--ink)}main{max-width:1000px;margin:0 auto;padding:0 12px 24px}h1,h2,h3{color:var(--navy);font-weight:700}h2{margin-top:0;padding-bottom:8px;border-bottom:2px solid var(--gold)}h3{margin:18px 0 8px}.brand{background:var(--navy);color:#fff;margin:0 -12px;padding:14px 20px;display:flex;align-items:baseline;gap:12px;border-bottom:3px solid var(--gold)}.brand span{font-size:22px;letter-spacing:1px}.brand small{color:var(--gold-soft);letter-spacing:2px;text-transform:uppercase;font-size:11px}nav{display:flex;flex-wrap:wrap;gap:2px;align-items:center;padding:10px 0 8px}.spacer{flex:1}.card{background:var(--paper);border:1px solid var(--line);border-radius:4px;padding:20px;margin-bottom:14px;box-shadow:0 2px 6px #1f2a4414}.narrow{max-width:380px;margin:56px auto}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:10px 14px}label{display:flex;flex-direction:column;gap:4px;font-size:13px;color:var(--muted);margin-bottom:8px;font-family:system-ui,Arial,sans-serif}input,select,textarea{padding:8px 10px;border:1px solid var(--line);border-radius:3px;font-size:15px;background:#fff;color:var(--ink);font-family:system-ui,Arial,sans-serif}input:focus,select:focus,textarea:focus{outline:2px solid var(--gold);outline-offset:0}input[type=color]{padding:2px;height:38px}input[type=checkbox]{width:auto}input[type=range]{padding:0;accent-color:var(--gold)}button{background:var(--navy);color:#fff;border:1px solid var(--navy);border-radius:3px;padding:9px 16px;font-size:14px;letter-spacing:.3px;cursor:pointer;font-family:system-ui,Arial,sans-serif}button:hover:not(:disabled){background:var(--navy2)}button:disabled{opacity:.45;cursor:default}button.secondary{background:transparent;color:var(--navy);border-color:var(--navy)}button.secondary:hover:not(:disabled){background:var(--gold-soft)}button.danger{background:var(--bad);border-color:var(--bad)}button.link{background:none;border:0;color:var(--navy);padding:6px 10px;border-radius:0;text-decoration:none}button.link:hover:not(:disabled){background:none;color:var(--gold)}nav button.link{font-size:15px;border-bottom:2px solid transparent}nav button.link.active{font-weight:700;color:var(--navy);border-bottom:2px solid var(--gold)}.row{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0;align-items:center}.err{color:var(--bad)}.ok{color:var(--ok)}.facts{list-style:none;padding:0;line-height:1.8}.serials{display:flex;flex-wrap:wrap;gap:6px}.chip{flex-direction:row;align-items:center;gap:4px;background:var(--gold-soft);color:var(--ink);padding:4px 8px;border-radius:3px;margin:0;font-family:monospace}.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:10px;margin-bottom:8px}.stats div{background:#fff;border:1px solid var(--line);border-top:3px solid var(--gold);padding:12px;text-align:center;font-size:13px;color:var(--muted)}.stats b{display:block;font-size:26px;color:var(--navy)}.scroll{overflow-x:auto}table{width:100%;border-collapse:collapse;font-size:14px;font-family:system-ui,Arial,sans-serif}th{background:var(--navy);color:#fff;text-align:left;padding:8px;font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.6px}td{padding:8px;border-bottom:1px solid var(--line);vertical-align:top}tbody tr:nth-child(2n){background:#fbf7ec}.st{font-weight:700;font-size:12px;letter-spacing:.6px}.st.unused,.st.valid{color:var(--ok)}.st.expired{color:#9a6a12}.st.redeemed{color:var(--navy2)}.st.deleted{color:var(--bad)}.small{font-size:12px;line-height:1.6;color:var(--muted)}.badge{font-size:12px;background:var(--gold-soft);color:var(--navy);padding:2px 10px;border-radius:10px;font-weight:400;vertical-align:middle;font-family:system-ui,Arial,sans-serif}.badge.warn{background:#f6dfb0;color:#7a4b00}.keybox{border:2px dashed var(--gold);background:#fff;padding:12px;margin:12px 0;display:flex;flex-direction:column;gap:8px}.keybox code{word-break:break-all;font-size:14px;background:var(--gold-soft);padding:6px}pre{background:var(--navy);color:#f3ead2;padding:12px;overflow-x:auto;font-size:12px;border-radius:3px}code{font-family:ui-monospace,Menlo,Consolas,monospace}.print-root{overflow-x:auto}@media (max-width: 600px){.brand{padding:12px}.card{padding:14px}}