:root{--bg:#f4f7fb;--panel:#fff;--line:#dfe7f1;--text:#1e2a3a;--muted:#74849a;--primary:#3568f0;--primary-dark:#2454d0;--danger:#da3c52;--success:#18a565}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Arial,"Microsoft YaHei",sans-serif}
a{color:inherit}.muted{color:var(--muted)}.topbar{height:68px;background:#111c2f;color:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 26px;position:sticky;top:0;z-index:10;box-shadow:0 8px 24px rgba(20,34,56,.18)}
.brand{display:flex;align-items:center;gap:12px;font-size:18px;font-weight:700}.brand-mark{display:grid;place-items:center;width:36px;height:36px;border-radius:11px;background:linear-gradient(135deg,#4c7dff,#2d5ad8);font-weight:900}.top-actions{display:flex;align-items:center;gap:10px}.user{font-size:14px;color:#bdcbe2;margin-right:8px}
.container{max-width:1600px;margin:26px auto;padding:0 24px 60px}.panel{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:22px;margin-bottom:20px;box-shadow:0 8px 24px rgba(28,47,78,.06)}.panel h2{margin:0 0 18px;font-size:20px}.panel.highlight{border-color:#89a8ff;background:#f6f9ff}
.stats{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px;margin-bottom:20px}.stat{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 20px;display:flex;align-items:center;justify-content:space-between}.stat span{color:var(--muted);font-size:14px}.stat strong{font-size:25px}
.form-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;align-items:end}.form-grid label{display:flex;flex-direction:column;gap:7px;color:#526176;font-size:14px}.form-grid .wide{grid-column:span 2}input,select,textarea{width:100%;border:1px solid #cad6e5;border-radius:10px;padding:11px 12px;font-size:14px;background:#fff;color:var(--text);outline:none}input:focus,select:focus,textarea:focus{border-color:#7b9cff;box-shadow:0 0 0 3px rgba(76,116,255,.12)}
.btn{display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:10px;padding:10px 15px;cursor:pointer;text-decoration:none;font-size:14px;font-weight:700}.btn.primary{background:var(--primary);color:#fff}.btn.primary:hover{background:var(--primary-dark)}.btn.ghost{background:transparent;border:1px solid #ccd7e6;color:var(--text)}.topbar .btn.ghost{border-color:#40516e;color:#dbe6f8}.danger-text{color:#ff9ba6!important}.btn.full{width:100%;margin-top:18px}
.alert{padding:13px 16px;border-radius:11px;margin-bottom:18px;font-weight:700}.alert.success{background:#e4f8ee;color:#117d4c;border:1px solid #a9e4c6}.alert.error{background:#ffe9ec;color:#a9283a;border:1px solid #f5b6bf}
.panel-title-row{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:14px}.panel-title-row h2{margin:0}.search-form{display:flex;gap:8px}.search-form input{width:260px}.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:12px}table{border-collapse:collapse;width:100%;min-width:1250px;font-size:13px}th,td{padding:12px 10px;border-bottom:1px solid #edf1f6;text-align:left;vertical-align:middle}th{background:#f7f9fc;color:#59687d;white-space:nowrap;position:sticky;top:0}td code{font-size:13px;color:#2446a3;background:#eef3ff;padding:4px 7px;border-radius:6px}.empty{text-align:center;color:var(--muted);padding:32px}
.badge{display:inline-block;border-radius:999px;padding:4px 9px;font-weight:700;white-space:nowrap}.status-unused{background:#eef2f7;color:#65758c}.status-active{background:#e4f8ee;color:#117d4c}.status-expired{background:#fff2dd;color:#a05a00}.status-disabled{background:#ffe8eb;color:#b02a3d}
.actions{display:flex;gap:5px;flex-wrap:wrap}.actions form{display:inline}.mini{border:1px solid #cbd7e6;background:#fff;color:#4a5b72;border-radius:7px;padding:5px 8px;cursor:pointer}.mini:hover{background:#f4f7fb}.mini.danger{color:var(--danger);border-color:#f0bcc4}
.codes{min-height:150px;font-family:Consolas,monospace;font-size:15px;line-height:1.7;resize:vertical}.machine{max-width:130px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:radial-gradient(circle at 20% 0,#244679 0,#101b2d 50%,#0b1422 100%);padding:24px}.login-card{width:min(420px,100%);background:#fff;border-radius:20px;padding:34px;box-shadow:0 30px 80px rgba(0,0,0,.38)}.login-card.wide-card{width:min(470px,100%)}.login-card h1{margin:12px 0 8px;font-size:27px}.login-card label{display:block;margin:15px 0 7px;font-weight:700;font-size:14px}.login-logo{display:inline-grid;place-items:center;width:56px;height:56px;border-radius:16px;background:linear-gradient(135deg,#4c7dff,#2d5ad8);color:#fff;font-weight:900}.back-link{display:block;text-align:center;margin-top:18px;color:#51657f;text-decoration:none;font-size:14px}
@media(max-width:1000px){.stats{grid-template-columns:repeat(2,1fr)}.form-grid{grid-template-columns:1fr 1fr}.form-grid .wide{grid-column:span 2}.topbar{height:auto;padding:14px 18px;align-items:flex-start;gap:12px}.top-actions{flex-wrap:wrap;justify-content:flex-end}.user{width:100%;text-align:right}.panel-title-row{align-items:flex-start;flex-direction:column}.search-form,.search-form input{width:100%}}
@media(max-width:600px){.container{padding:0 12px 40px}.stats{grid-template-columns:1fr}.form-grid{grid-template-columns:1fr}.form-grid .wide{grid-column:span 1}.topbar{flex-direction:column}.top-actions{justify-content:flex-start}.user{text-align:left}.panel{padding:16px}.login-card{padding:26px}}