:root{
  --bg:#f6f7fb; --card:#fff; --text:#1f2328; --muted:#667085; --line:#e6e8ef;
  --blue:#1677ff; --blue2:#0b5ed7; --danger:#d92d20; --ok:#12b76a;
  --shadow:0 8px 24px rgba(20,26,38,.08); --radius:12px;
  --shadow2:0 16px 48px rgba(20,26,38,.10);
  --focus:0 0 0 4px rgba(22,119,255,.16);
  --warn:#f59e0b;
}
*{box-sizing:border-box;}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial;background:var(--bg);color:var(--text);}
a{color:inherit;text-decoration:none;}
.hidden{display:none !important;}

.layout{display:grid;grid-template-columns:260px 1fr;min-height:100vh;width:100%;max-width:1440px;margin:0 auto;}
.sidebar{background:var(--card);border-right:1px solid var(--line);padding:14px 12px;position:sticky;top:0;align-self:start;max-height:100vh;display:flex;flex-direction:column;overflow:hidden;}
.brand{display:flex;align-items:center;gap:10px;padding:10px 10px 14px;}
.logo{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,#1677ff,#7c3aed);box-shadow:var(--shadow);}
.brand h1{font-size:16px;margin:0;line-height:1.2;}
.profile{display:flex;gap:10px;align-items:center;padding:10px;border:1px solid var(--line);border-radius:var(--radius);background:#fcfcfd;}
.avatar{width:36px;height:36px;border-radius:999px;background:#e9efff;border:1px solid #d6e4ff;display:flex;align-items:center;justify-content:center;color:#1d4ed8;font-weight:700;}
.pmeta{line-height:1.1;}
.pmeta .name{font-size:13px;font-weight:700;}
.pmeta .role{font-size:12px;color:var(--muted);margin-top:2px;}

.menu{margin-top:12px;padding:2px 6px 10px;flex:1;min-height:0;overflow:auto;overscroll-behavior:contain;-webkit-overflow-scrolling:touch;}
.menu h3{font-size:12px;color:var(--muted);font-weight:900;margin:14px 6px 8px;letter-spacing:.2px;display:flex;align-items:center;gap:10px;}
.menu h3::after{content:"";flex:1;height:1px;background:var(--line);}
.menu-group{margin-top:2px;}
.menu-group-title{cursor:pointer;user-select:none;}
.menu-group-title::before{content:"▾";font-size:11px;color:var(--muted);transition:transform .12s ease;}
.menu-group-title[aria-expanded="false"]::before{transform:rotate(-90deg);}
.menu-group-title[aria-expanded="false"] + .menu-group-body{display:none;}
.menu-group-body.hidden{display:none;}
.item{position:relative;display:flex;align-items:center;gap:10px;padding:10px 10px;border-radius:12px;cursor:pointer;border:1px solid transparent;user-select:none;transition:background .12s ease,border-color .12s ease,color .12s ease;}
.item:hover{background:#f3f6ff;border-color:#e3edff;}
.item:focus-visible{outline:none;box-shadow:var(--focus);}
.item.active{background:#eaf2ff;border-color:#d6e4ff;color:#0b5ed7;}
.item.active::before{content:"";position:absolute;left:6px;top:10px;bottom:10px;width:3px;border-radius:999px;background:var(--blue);}
.dot{width:8px;height:8px;border-radius:999px;background:#98a2b3;flex:0 0 auto;}
.item.active .dot{background:var(--blue);}

.main{display:flex;flex-direction:column;min-width:0;}
.topbar{height:56px;display:flex;align-items:center;justify-content:space-between;padding:0 18px;background:rgba(255,255,255,.92);backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5;}
.badge{font-size:12px;color:var(--muted);padding:6px 10px;border:1px solid var(--line);border-radius:999px;background:#fcfcfd;}
.top-right{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:13px;}
.notif{width:34px;height:34px;border-radius:10px;border:1px solid var(--line);background:#fff;display:flex;align-items:center;justify-content:center;}
.content{padding:18px;max-width:1200px;width:100%;margin:0 auto;}
.page-title{display:flex;align-items:flex-end;justify-content:space-between;gap:12px;margin:10px 0 14px;}
.page-title h2{margin:0;font-size:18px;letter-spacing:.2px;}
.page-title .desc{margin:6px 0 0;color:var(--muted);font-size:13px;}

.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:14px;}
.card:hover{box-shadow:var(--shadow2);}
.section-title{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:0 0 10px;}
.section-title h3{margin:0;font-size:14px;}
.divider{height:1px;background:var(--line);margin:12px 0;}

.row{display:flex;gap:10px;flex-wrap:wrap;align-items:end;}
.field{display:flex;flex-direction:column;gap:6px;min-width:180px;flex:1;}
.field label{font-size:12px;color:var(--muted);font-weight:700;}
.field input,.field select,.field textarea{padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:#fff;outline:none;min-height:40px;font-size:14px;}
.field input:focus,.field select:focus,.field textarea:focus{border-color:#b6d4fe;box-shadow:var(--focus);}

.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:10px;align-items:center;}
.btn{border:1px solid transparent;border-radius:10px;padding:10px 12px;font-weight:700;cursor:pointer;display:inline-flex;gap:8px;align-items:center;min-height:40px;font-size:14px;}
.btn.primary{background:var(--blue);color:#fff;}
.btn.primary:hover{background:var(--blue2);}
.btn.light{background:#fff;border-color:var(--line);color:var(--text);}
.btn.light:hover{background:#f9fafb;}
.btn.danger{background:var(--danger);color:#fff;}
.btn.danger:hover{filter:brightness(.95);}
.btn.ok{background:var(--ok);color:#fff;}
.btn.ok:hover{filter:brightness(.95);}
.btn:disabled{opacity:.55;cursor:not-allowed;}
.btn.small{padding:8px 10px;min-height:34px;border-radius:10px;font-weight:800;font-size:12px;}

.hint{color:var(--muted);font-size:12px;margin-top:8px;}
.msg-ok{color:var(--ok);font-size:13px;margin-top:6px;}
.msg-err{color:var(--danger);font-size:13px;margin-top:6px;}
.msg-warn{color:var(--warn);font-size:13px;margin-top:6px;}

/* Table */
.tbl-wrap{overflow:auto;margin-top:10px;}
table{width:100%;border-collapse:collapse;font-size:13px;}
th{text-align:left;padding:10px 8px;border-bottom:2px solid var(--line);color:var(--muted);font-weight:700;font-size:12px;white-space:nowrap;}
td{padding:8px 8px;border-bottom:1px solid var(--line);white-space:nowrap;}
tr:hover td{background:#f9fafb;}

/* Status tags */
.tag{display:inline-block;padding:3px 8px;border-radius:999px;font-size:11px;font-weight:700;}
.tag-blue{background:#eaf2ff;color:var(--blue);}
.tag-green{background:#e6f7ec;color:var(--ok);}
.tag-red{background:#fef0ef;color:var(--danger);}
.tag-yellow{background:#fff8e6;color:var(--warn);}
.tag-gray{background:#f2f3f5;color:var(--muted);}

/* Stats cards */
.stat-row{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:16px;}
.stat-card{flex:1;min-width:150px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:14px;box-shadow:var(--shadow);}
.stat-card .num{font-size:28px;font-weight:900;color:var(--blue);}
.stat-card .lbl{font-size:12px;color:var(--muted);margin-top:4px;}

/* Modal */
.modal{position:fixed;inset:0;background:rgba(0,0,0,.4);display:flex;align-items:center;justify-content:center;z-index:100;}
.modal-card{background:var(--card);border-radius:var(--radius);padding:24px;min-width:360px;max-width:500px;box-shadow:var(--shadow2);}
.modal-card h2{margin:0 0 16px;font-size:18px;}

/* Responsive */
@media(max-width:768px){
  .layout{grid-template-columns:1fr;}
  .sidebar{display:none;}
}