:root{
    --primary:#3b6ef5; --primary-d:#2c52d6; --bg:#f4f6fb; --panel:#fff;
    --border:#e3e8f0; --text:#1f2937; --muted:#6b7280;
    --danger:#e74c3c; --success:#27ae60; --warn:#f39c12;
    --radius:10px; --shadow:0 2px 10px rgba(0,0,0,.05);
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;background:var(--bg);color:var(--text);font-size:14px;line-height:1.6}
a{color:var(--primary);text-decoration:none}
a:hover{opacity:.85}

/* layout */
.layout{display:flex;min-height:100vh}
.sidebar{width:220px;background:#1e2734;color:#cbd5e1;display:flex;flex-direction:column;padding:18px 0;position:sticky;top:0;height:100vh}
.sidebar .brand{padding:6px 22px 22px;font-size:17px;font-weight:700;color:#fff;border-bottom:1px solid #2c3848;margin-bottom:14px}
.sidebar nav{display:flex;flex-direction:column;flex:1}
.sidebar nav a{padding:12px 22px;color:#cbd5e1;border-left:3px solid transparent}
.sidebar nav a:hover{background:#283443;color:#fff}
.sidebar nav a.active{background:var(--primary);color:#fff;border-left-color:#fff}
.sidebar-footer{padding:14px 22px;border-top:1px solid #2c3848;display:flex;justify-content:space-between;align-items:center;font-size:13px;color:#94a3b8}
.content{flex:1;padding:28px;min-width:0}
.topbar{margin-bottom:22px}
.topbar h1{font-size:22px;font-weight:600}

/* card */
.card{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px;margin-bottom:20px}
.card h2{font-size:16px;margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--border)}

/* stat grid */
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:18px;margin-bottom:20px}
.stat{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.stat .num{font-size:28px;font-weight:700;color:var(--primary)}
.stat .label{color:var(--muted);margin-top:4px;font-size:13px}

/* table */
table{width:100%;border-collapse:collapse;background:var(--panel);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
th,td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--border);font-size:13px}
th{background:#f8fafc;color:var(--muted);font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.3px}
tr:last-child td{border-bottom:none}
tr:hover td{background:#fafbfd}
.muted{color:var(--muted)}
.badge{display:inline-block;padding:2px 9px;border-radius:11px;font-size:12px;font-weight:600}
.badge.ok{background:#e6f7ed;color:var(--success)}
.badge.warn{background:#fff5e0;color:var(--warn)}
.badge.err{background:#fdecea;color:var(--danger)}
.badge.gray{background:#eef0f4;color:var(--muted)}

/* form */
.form-row{display:flex;align-items:center;gap:14px;margin-bottom:14px}
.form-row label{width:120px;color:var(--muted);font-size:13px}
.form-row input,.form-row select{flex:1;padding:9px 12px;border:1px solid var(--border);border-radius:8px;font-size:14px;max-width:380px}
.form-row input:focus,.form-row select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(59,110,245,.12)}
.toolbar{display:flex;justify-content:space-between;align-items:center;gap:14px;margin-bottom:16px;flex-wrap:wrap}
.toolbar .search{display:flex;gap:8px;align-items:center}
.toolbar input[type=text]{padding:9px 12px;border:1px solid var(--border);border-radius:8px;width:240px}

/* buttons */
.btn{display:inline-block;padding:9px 16px;border:1px solid var(--border);border-radius:8px;background:var(--panel);color:var(--text);cursor:pointer;font-size:14px;text-decoration:none;transition:.15s}
.btn:hover{background:#f8fafc}
.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary)}
.btn-primary:hover{background:var(--primary-d)}
.btn-danger{background:var(--danger);color:#fff;border-color:var(--danger)}
.btn-sm{padding:5px 10px;font-size:12px}
.btn-block{width:100%;text-align:center;margin-top:8px}
.actions a{margin-right:6px}

/* pagination */
.pager{margin-top:16px;text-align:center}
.pager a,.pager span{display:inline-block;padding:6px 12px;margin:0 2px;border:1px solid var(--border);border-radius:6px;font-size:13px}
.pager span.current{background:var(--primary);color:#fff;border-color:var(--primary)}

/* alerts */
.alert{padding:12px 16px;border-radius:8px;margin-bottom:16px}
.alert-success{background:#e6f7ed;color:#1d7a3d;border:1px solid #b7e4c7}
.alert-error{background:#fdecea;color:#b03a2e;border:1px solid #f5b7b1}
.alert h3{margin-bottom:4px}

/* modal-less confirm dialog via inline onclick */
.danger-link{color:var(--danger);cursor:pointer;background:none;border:none;font-size:13px}

/* install page */
.install-body{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:20px}
.install-card{background:var(--panel);border:1px solid var(--border);border-radius:14px;box-shadow:0 8px 30px rgba(0,0,0,.08);padding:34px;width:100%;max-width:560px}
.install-card h1{text-align:center;margin-bottom:6px;color:var(--primary)}
.install-card h2{font-size:15px;margin:22px 0 12px;color:var(--muted)}

/* login page */
.login-body{display:flex;align-items:center;justify-content:center;min-height:100vh;background:linear-gradient(135deg,#3b6ef5,#5b8def)}
.login-card{background:#fff;border-radius:14px;box-shadow:0 10px 40px rgba(0,0,0,.2);padding:36px;width:100%;max-width:380px}
.login-card h1{font-size:20px;text-align:center;margin-bottom:6px;color:var(--primary)}
.login-card .sub{text-align:center;color:var(--muted);margin-bottom:22px;font-size:13px}
.login-card .form-row{flex-direction:column;align-items:stretch;gap:6px}
.login-card .form-row label{width:auto}
.login-card .form-row input{max-width:none}

.mono{font-family:Consolas,Monaco,monospace;background:#f4f6fb;padding:1px 6px;border-radius:4px;font-size:12px}
.empty{text-align:center;padding:40px;color:var(--muted)}