:root{
  --bg:#f6f7fb;
  --card:#ffffff;
  --text:#0f172a;
  --muted:#64748b;
  --border:#e5e7eb;
  --primary:#2563eb;
  --primary2:#1d4ed8;
  --shadow:0 10px 24px rgba(15,23,42,.06);
  --radius:16px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,sans-serif;background:var(--bg);color:var(--text)}
a{color:inherit;text-decoration:none}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,monospace}
.small{font-size:12px;color:var(--muted)}
.strong{font-weight:700}
.h3{font-size:20px;font-weight:800}
.h4{font-size:18px;font-weight:800}
.h5{font-size:16px;font-weight:800}
.h6{font-size:14px;font-weight:800}
.sub{font-size:13px;color:var(--muted);margin-top:4px}

.app{display:grid;grid-template-columns:280px 1fr;min-height:100vh}
.sidebar{position:sticky;top:0;height:100vh;padding:18px;border-right:1px solid var(--border);background:linear-gradient(180deg,#ffffff,#fbfdff)}
.brand{display:flex;gap:12px;align-items:center;padding:10px;border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}
.logo{width:42px;height:42px;border-radius:14px;display:flex;align-items:center;justify-content:center;background:rgba(37,99,235,.1);font-size:20px}
.brand-title{font-weight:900}
.brand-sub{font-size:12px;color:var(--muted);margin-top:2px}

.nav{margin-top:16px;display:flex;flex-direction:column;gap:6px}
.nav-item{padding:10px 12px;border-radius:14px;border:1px solid transparent}
.nav-item:hover{background:#f3f6ff;border-color:#dbeafe}
.nav-sep{height:1px;background:var(--border);margin:10px 0}

.logout{margin-top:auto;padding-top:12px}

.main{display:flex;flex-direction:column}
.topbar{display:flex;justify-content:space-between;align-items:center;padding:16px 18px;border-bottom:1px solid var(--border);background:#ffffff;position:sticky;top:0;z-index:10}
.page-title{font-weight:900}
.content{padding:18px}
.footer{padding:16px 18px;color:var(--muted);font-size:12px}

.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}
.card-soft{background:linear-gradient(180deg,#ffffff,#fbfdff)}
.card-h{padding:14px 16px;border-bottom:1px solid var(--border)}
.card-b{padding:14px 16px}
.hr{height:1px;background:var(--border);margin:14px 0}
.row{display:flex}
.row-between{display:flex;justify-content:space-between;gap:12px;align-items:center}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.actions{display:flex;gap:10px;align-items:center}
.pill{display:inline-flex;align-items:center;gap:8px;padding:8px 10px;border:1px solid #dbeafe;background:#eff6ff;color:#1e3a8a;border-radius:999px;font-size:12px;font-weight:700}

label{display:block;font-size:12px;color:#334155;margin-bottom:6px}
input,select,textarea{
  width:100%;padding:10px 12px;border-radius:14px;border:1px solid var(--border);
  font-size:14px;outline:none;background:#fff;color:var(--text)
}
textarea{resize:vertical}
input:focus,select:focus,textarea:focus{border-color:#60a5fa;box-shadow:0 0 0 4px rgba(96,165,250,.18)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--primary);border:1px solid var(--primary2);color:#fff;
  padding:10px 14px;border-radius:14px;font-weight:800;cursor:pointer
}
.btn:hover{filter:brightness(.98)}
.btn-ghost{
  background:#ffffff;border:1px solid var(--border);color:var(--text)
}
.btn-ghost:hover{background:#f8fafc}
.badge{
  display:inline-flex;align-items:center;padding:4px 8px;border-radius:999px;
  background:#f1f5f9;border:1px solid var(--border);font-size:12px;color:#334155
}

.alert{padding:10px 12px;border-radius:14px;margin:12px 0;border:1px solid var(--border);background:#fff}
.alert-danger{border-color:#fecaca;background:#fef2f2;color:#991b1b}
.alert-info{border-color:#a5f3fc;background:#ecfeff;color:#155e75}
.empty{padding:12px;border:1px dashed var(--border);border-radius:14px;color:var(--muted);background:#fff}

.table{display:flex;flex-direction:column;border:1px solid var(--border);border-radius:14px;overflow:hidden}
.tr{display:grid;grid-template-columns:2fr 1fr 1fr;gap:12px;padding:10px 12px;border-top:1px solid var(--border);align-items:center}
.tr.th{background:#f8fafc;border-top:none;font-size:12px;color:#334155;font-weight:800}
.table .tr:hover{background:#fbfdff}
.table a.tr{cursor:pointer}
@media (max-width: 980px){
  .app{grid-template-columns:1fr}
  .sidebar{height:auto;position:relative}
  .topbar{position:relative}
  .grid-2{grid-template-columns:1fr}
}

.modal{position:fixed;inset:0;background:rgba(15,23,42,.35);display:flex;align-items:center;justify-content:center;padding:16px;z-index:50}
.modal-card{width:min(760px, 96vw);background:#fff;border-radius:18px;border:1px solid var(--border);box-shadow:0 20px 60px rgba(15,23,42,.18);padding:14px 16px}
.chat{display:flex;flex-direction:column;gap:10px}
.chat-item{border:1px solid var(--border);border-radius:14px;padding:10px 12px;background:#fff}
.chat-meta{display:flex;justify-content:space-between;gap:10px;align-items:center}
.chat-body{margin-top:6px}