:root{
  --blue:#1b75bb;--blue-dark:#155a8f;--green:#2faa4a;--green-dark:#218a3a;--red:#e23b3b;
  --ink:#1d2533;--body:#4a5568;--muted:#8a95a6;--line:#e7ebf1;--bg:#f1f5fa;--sidebar:#0f2440;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'Inter',system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--body);line-height:1.6}
h1,h2,h3,h4{font-family:'Poppins',sans-serif;color:var(--ink)}
a{text-decoration:none;color:inherit}

/* layout */
.admin-wrap{display:flex;min-height:100vh}
.sidebar{width:250px;background:var(--sidebar);color:#cfe0f5;position:fixed;top:0;bottom:0;left:0;display:flex;flex-direction:column;z-index:20}
.sidebar-brand{height:64px;display:flex;align-items:center;justify-content:center;padding:0 20px;border-bottom:1px solid var(--line);background:#fff}
.sidebar-brand img{height:34px}
.sidebar-nav{padding:14px 12px;flex:1;overflow-y:auto}
.sidebar-nav .grp{font-size:11px;text-transform:uppercase;letter-spacing:1px;color:#6f86a6;margin:18px 10px 8px}
.sidebar-nav a{display:flex;align-items:center;gap:12px;padding:11px 14px;border-radius:8px;color:#cfe0f5;font-size:14.5px;font-weight:500;margin-bottom:2px;transition:.2s}
.sidebar-nav a i{width:18px;text-align:center;font-size:15px}
.sidebar-nav a:hover{background:rgba(255,255,255,.07);color:#fff}
.sidebar-nav a.active{background:var(--blue);color:#fff}
.sidebar-foot{padding:14px;border-top:1px solid rgba(255,255,255,.08)}
.sidebar-foot a{display:flex;align-items:center;gap:10px;color:#ffb4b4;font-size:14px;padding:8px 10px}

.main{margin-left:250px;flex:1;display:flex;flex-direction:column;min-width:0}
.topbar{background:#fff;border-bottom:1px solid var(--line);padding:0 28px;height:64px;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:10}
.topbar h1{font-size:20px;font-weight:600}
.topbar .who{font-size:14px;color:var(--muted)}
.topbar .who b{color:var(--ink)}
.content{padding:28px;flex:1}

/* cards / stats */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-bottom:26px}
.stat{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;display:flex;align-items:center;gap:16px}
.stat .ic{width:54px;height:54px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:22px;color:#fff;background:linear-gradient(150deg,var(--blue),var(--green))}
.stat .n{font-family:'Poppins';font-size:26px;font-weight:700;color:var(--ink);line-height:1}
.stat .l{font-size:13px;color:var(--muted);margin-top:4px}

.card{background:#fff;border:1px solid var(--line);border-radius:14px;margin-bottom:24px}
.card-head{padding:18px 22px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between}
.card-head h2{font-size:17px;font-weight:600}
.card-body{padding:22px}

/* table */
table.tbl{width:100%;border-collapse:collapse}
table.tbl th,table.tbl td{padding:13px 16px;text-align:left;border-bottom:1px solid var(--line);font-size:14px}
table.tbl th{font-family:'Poppins';font-size:12px;text-transform:uppercase;letter-spacing:.5px;color:var(--muted);font-weight:600;background:#f8fafc}
table.tbl tr:last-child td{border-bottom:0}
table.tbl tr:hover td{background:#f8fbff}
.badge{display:inline-block;font-size:11px;font-weight:600;padding:3px 10px;border-radius:50px}
.badge.on{background:#e3f7e8;color:var(--green-dark)}
.badge.off{background:#fde8e8;color:var(--red)}
.badge.pop{background:#fff0d6;color:#b5790a}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:8px;font-family:'Poppins';font-weight:600;font-size:14px;padding:10px 18px;border-radius:8px;border:1px solid transparent;cursor:pointer;transition:.2s}
.btn-pri{background:var(--blue);color:#fff}.btn-pri:hover{background:var(--blue-dark)}
.btn-grn{background:var(--green);color:#fff}.btn-grn:hover{background:var(--green-dark)}
.btn-sm{padding:7px 12px;font-size:13px}
.btn-light{background:#eef3f9;color:var(--ink)}.btn-light:hover{background:#e1eaf4}
.btn-danger{background:#fde8e8;color:var(--red)}.btn-danger:hover{background:var(--red);color:#fff}
.act{display:inline-flex;gap:6px}

/* forms */
.form-row{margin-bottom:18px}
.form-row label{display:block;font-size:13.5px;font-weight:600;color:var(--ink);margin-bottom:7px;font-family:'Poppins'}
.form-row input[type=text],.form-row input[type=number],.form-row input[type=password],.form-row input[type=email],.form-row textarea,.form-row select{
  width:100%;padding:11px 14px;border:1px solid var(--line);border-radius:8px;font-size:14.5px;font-family:inherit;color:var(--ink);background:#fff;transition:.2s}
.form-row input:focus,.form-row textarea:focus,.form-row select:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(27,117,187,.12)}
.form-row textarea{resize:vertical;min-height:90px;line-height:1.6}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 22px}
.check{display:flex;align-items:center;gap:9px;font-size:14.5px;color:var(--ink)}
.check input{width:18px;height:18px;accent-color:var(--blue)}
.hint{font-size:12.5px;color:var(--muted);margin-top:5px}
.form-actions{display:flex;gap:10px;margin-top:8px;padding-top:18px;border-top:1px solid var(--line)}
.text-danger{color:var(--red);font-size:13px;margin-top:5px;display:block}
.alert{padding:13px 18px;border-radius:9px;font-size:14px;margin-bottom:20px;display:flex;align-items:center;gap:10px}
.alert-ok{background:#e3f7e8;color:var(--green-dark)}
.alert-err{background:#fde8e8;color:var(--red)}

/* login */
.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--sidebar),var(--blue-dark));padding:20px}
.login-box{background:#fff;border-radius:16px;box-shadow:0 30px 70px rgba(0,0,0,.3);width:100%;max-width:400px;overflow:hidden}
.login-head{text-align:center;padding:34px 30px 10px}
.login-head img{height:42px;margin-bottom:16px}
.login-head h2{font-size:21px;font-weight:700}
.login-head p{font-size:14px;color:var(--muted);margin-top:4px}
.login-body{padding:24px 34px 36px}

@media(max-width:880px){
  .sidebar{transform:translateX(-100%);transition:.3s}
  .sidebar.open{transform:none}
  .main{margin-left:0}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .form-grid{grid-template-columns:1fr}
  .menu-btn{display:inline-flex!important}
}
.menu-btn{display:none;background:none;border:0;font-size:22px;color:var(--ink);cursor:pointer}

@media(max-width:600px){
  .content{padding:18px 14px}
  .topbar{padding:0 16px}
  .topbar h1{font-size:18px}
  .stat-grid{grid-template-columns:1fr;gap:14px}
  .card-head{flex-wrap:wrap;gap:10px}
  .card-body{overflow-x:auto}
  table.tbl{min-width:560px}
  .form-actions{flex-wrap:wrap}
}