:root{
  --bg:#f4f6f9; --panel:#ffffff; --border:#e3e7ee; --text:#1c2430; --text-dim:#6b7686;
  --accent:#3457d5; --accent-dim:#eef1fd; --ok:#1c9c6b; --ok-dim:#e7f8f1;
  --warn:#c94b4b; --warn-dim:#fbeaea; --radius:10px;
}
*{box-sizing:border-box;}
body{margin:0;font-family:"Segoe UI","Hiragino Kaku Gothic ProN","Yu Gothic",sans-serif;background:var(--bg);color:var(--text);}
.app{display:flex;min-height:100vh;}

.sidebar{width:220px;background:#171d2b;color:#dfe4ee;display:flex;flex-direction:column;padding:20px 14px;flex-shrink:0;}
.brand{display:flex;align-items:center;gap:10px;padding:6px 8px 22px;}
.brand-mark{width:32px;height:32px;border-radius:8px;background:linear-gradient(135deg,#3457d5,#7b93f0);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px;color:#fff;}
.brand-name{font-weight:600;font-size:15px;letter-spacing:.2px;}
nav{display:flex;flex-direction:column;gap:4px;flex:1;}
.nav-item{display:flex;align-items:center;gap:10px;background:none;border:none;color:#aab3c5;padding:10px 12px;border-radius:8px;font-size:13.5px;cursor:pointer;text-align:left;font-family:inherit;}
.nav-item svg{width:18px;height:18px;flex-shrink:0;}
.nav-item:hover{background:#232b3d;color:#fff;}
.nav-item.active{background:var(--accent);color:#fff;}
.sidebar-footer{padding-top:14px;}
.badge{display:inline-block;font-size:11px;padding:4px 9px;border-radius:20px;}
.badge-mock{background:#3a3120;color:#f0c869;}
.badge-live{background:#123d2b;color:#5fe3a8;}

.main{flex:1;padding:28px 34px;max-width:1100px;}
.topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:22px;}
.topbar h1{font-size:20px;margin:0;}
.btn{border:none;border-radius:8px;padding:9px 16px;font-size:13.5px;cursor:pointer;font-family:inherit;font-weight:500;}
.btn-primary{background:var(--accent);color:#fff;}
.btn-primary:hover{background:#2a45b8;}
.btn-ghost{background:var(--accent-dim);color:var(--accent);}
.btn-ghost:hover{background:#e0e5fb;}
.btn-danger-ghost{background:var(--warn-dim);color:var(--warn);}
.btn-sm{padding:6px 11px;font-size:12.5px;border-radius:6px;margin-right:6px;}

.view{display:none;}
.view.active{display:block;}

.stat-row{display:flex;gap:16px;margin-bottom:20px;}
.stat-card{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:16px 22px;flex:1;}
.stat-num{font-size:26px;font-weight:700;}
.stat-label{font-size:12.5px;color:var(--text-dim);margin-top:2px;}

.table{width:100%;border-collapse:collapse;background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;}
.table th{text-align:left;font-size:12px;color:var(--text-dim);font-weight:600;padding:12px 16px;background:#fafbfd;border-bottom:1px solid var(--border);}
.table td{padding:13px 16px;border-bottom:1px solid var(--border);font-size:13.5px;vertical-align:middle;}
.table tr:last-child td{border-bottom:none;}

.pill{display:inline-flex;align-items:center;gap:6px;font-size:12px;padding:4px 10px;border-radius:20px;}
.pill-online{background:var(--ok-dim);color:var(--ok);}
.pill-offline{background:var(--warn-dim);color:var(--warn);}
.pill-dot{width:6px;height:6px;border-radius:50%;background:currentColor;}

.content-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px;}
.content-card{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;}
.content-thumb{height:110px;background:#e9edf5;display:flex;align-items:center;justify-content:center;font-size:28px;color:#aab3c8;}
.content-body{padding:12px 14px;}
.content-name{font-size:13.5px;font-weight:600;margin-bottom:3px;}
.content-meta{font-size:11.5px;color:var(--text-dim);}
.content-card-add{border:1.5px dashed var(--border);display:flex;align-items:center;justify-content:center;min-height:170px;color:var(--text-dim);cursor:pointer;font-size:13px;flex-direction:column;gap:8px;}
.content-card-add:hover{border-color:var(--accent);color:var(--accent);}

.modal-backdrop{position:fixed;inset:0;background:rgba(20,24,34,.45);display:none;align-items:center;justify-content:center;z-index:50;}
.modal-backdrop.open{display:flex;}
.modal{background:#fff;border-radius:12px;padding:24px 26px;width:380px;max-width:90vw;}
.modal h3{margin:0 0 16px;font-size:16px;}
.field{margin-bottom:14px;}
.field label{display:block;font-size:12.5px;color:var(--text-dim);margin-bottom:5px;}
.field input,.field select{width:100%;padding:8px 10px;border:1px solid var(--border);border-radius:7px;font-size:13.5px;font-family:inherit;}
.modal-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:18px;}