:root{--navy: #0B1F33;--cyan: #0891B2;--cyan-dark: #0E7490;--green: #10B981;--ink: #0B1F33;--muted: #4A5D70;--line: #DCE4EC;--bg: #FFFFFF;--bg-soft: #F3F6F9;--red: #B42318;--amber: #B54708;--radius: 14px}*{box-sizing:border-box}body{margin:0;font-family:Manrope,system-ui,-apple-system,Segoe UI,sans-serif;color:var(--ink);background:var(--bg-soft);line-height:1.5;-webkit-text-size-adjust:100%}a{color:var(--cyan-dark)}h1{font-size:1.5rem;margin:0 0 .5rem;line-height:1.25}h2{font-size:1.15rem;margin:0 0 .75rem}.wrap{max-width:980px;margin:0 auto;padding:0 16px}.top{background:var(--navy);color:#fff}.top-inner{display:flex;align-items:center;justify-content:space-between;height:60px}.brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font-weight:700}.top-nav{display:flex;gap:16px;align-items:center}.top-nav a,.top-nav .link{color:#fff}main.wrap{padding-top:24px;padding-bottom:24px}.foot{color:var(--muted);font-size:.85rem;padding-bottom:32px}.card{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:20px;margin-bottom:16px}.narrow{max-width:460px;margin:24px auto}.muted{color:var(--muted)}.small{font-size:.85rem}.center{text-align:center}.mono{font-family:ui-monospace,Consolas,monospace;font-size:.9em}.error{color:var(--red)}.warn{color:var(--amber)}label{display:block;font-weight:600;margin:12px 0 4px}input,select{font:inherit;width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:10px;background:#fff;margin-bottom:10px}input:focus,select:focus{outline:2px solid var(--cyan);outline-offset:0;border-color:var(--cyan)}input.code{font-size:1.6rem;letter-spacing:.4em;text-align:center}.row{display:flex;gap:8px}.row select{width:40%}form.inline{display:flex;gap:8px;align-items:flex-start}.btn{display:inline-block;font:inherit;font-weight:700;background:var(--cyan);color:#fff;border:0;border-radius:10px;padding:12px 18px;cursor:pointer;text-decoration:none;text-align:center}form .btn,.card>.btn{width:100%}form.inline .btn{width:auto}.btn:hover{background:var(--cyan-dark)}.btn:disabled{opacity:.55;cursor:default}.btn.small{padding:8px 14px;font-size:.9rem}.btn.ghost{background:transparent;color:var(--cyan-dark);border:1px solid var(--line)}.link{background:none;border:0;padding:6px 0;font:inherit;color:var(--cyan-dark);cursor:pointer;text-decoration:underline}.link.danger{color:var(--red)}.banner{border-radius:var(--radius);padding:14px 18px;margin-bottom:16px;font-weight:600}.banner.ok{background:#e7f8f1;color:#05603a;border:1px solid #A6E9CF}.note{background:#fef6e7;border:1px solid #F7D9A4;color:#7a4a06;border-radius:10px;padding:10px 12px;margin:12px 0 0}label.check{display:flex;gap:10px;align-items:flex-start;font-weight:600;margin:4px 0 14px;cursor:pointer}label.check input{width:20px;height:20px;margin:2px 0 0;flex:none}.steps{padding-left:20px;margin:0 0 16px}h3{font-size:1rem;margin:4px 0 8px}.row .btn.paste{width:auto;flex:none;margin-bottom:10px}input[placeholder="Serial number"]{font-family:ui-monospace,Consolas,monospace;letter-spacing:.05em}details.alt{margin-top:18px;border-top:1px solid var(--line);padding-top:14px}details.alt .btn{width:100%;margin-top:4px}.steps li{margin-bottom:6px}.devices{list-style:none;padding:0;margin:0 0 8px}.devices li{display:flex;justify-content:space-between;gap:12px;padding:12px 0;border-bottom:1px solid var(--line)}.devices li:last-child{border-bottom:0}details{margin-bottom:12px}summary{cursor:pointer;color:var(--cyan-dark)}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:16px}.stats div{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:14px}.stats b{display:block;font-size:1.6rem}.stats span{color:var(--muted);font-size:.85rem}.toolbar{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;margin-bottom:12px}.tabs{display:flex;gap:4px;flex-wrap:wrap}.tabs button{font:inherit;background:none;border:1px solid transparent;border-radius:8px;padding:6px 12px;cursor:pointer;color:var(--muted)}.tabs button.on{border-color:var(--line);background:var(--bg-soft);color:var(--ink);font-weight:700}.actions{display:flex;gap:8px}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse;font-size:.92rem}th,td{text-align:left;padding:10px 8px;border-bottom:1px solid var(--line);vertical-align:top}th{font-size:.8rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}.pill{display:inline-block;padding:2px 8px;border-radius:999px;font-size:.8rem;font-weight:700}.pill.ok{background:#e7f8f1;color:#05603a}.pill.warn{background:#fef0e6;color:var(--amber)}@media (max-width: 640px){.stats{grid-template-columns:repeat(2,1fr)}.row:not(.paste-row){flex-direction:column;gap:0}.row select{width:100%}}