:root{
  --primary:#2563eb;--accent:#7c3aed;--danger:#dc2626;
  --bg:#f1f4fb;--card:#ffffff;--border:#e2e7f5;--text:#1a2140;--text-muted:#64708a;
  --sidebar-bg:#151a2e;--sidebar-hover:#232a48;
}
*{box-sizing:border-box}
body{font-family:'Inter',system-ui,sans-serif;background:var(--bg);color:var(--text);margin:0}
.admin-wrapper{display:flex;min-height:100vh;position:relative}

.mobile-topbar{
  display:none;align-items:center;gap:14px;
  background:var(--sidebar-bg);color:#fff;padding:14px 18px;
  position:sticky;top:0;z-index:200;width:100%;
}
.mobile-toggle{background:none;border:0;color:#fff;font-size:1.6rem;cursor:pointer;line-height:1}
.mobile-title{font-weight:700;font-size:1.05rem}

.sidebar-overlay{display:none;position:fixed;inset:0;background:rgba(10,12,25,.55);z-index:150}
.sidebar-overlay.active{display:block}

.sidebar{
  width:250px;background:var(--sidebar-bg);color:#fff;padding:26px 18px;flex-shrink:0;
  min-height:100vh;
}
.admin-logo{font-size:1.15rem;font-weight:800;margin-bottom:8px;background:linear-gradient(90deg,#60a5fa,#c084fc);-webkit-background-clip:text;background-clip:text;color:transparent}
.admin-subtitle{font-size:.78rem;color:#8891ab;margin-bottom:26px}
.sidebar nav{display:flex;flex-direction:column;gap:4px}
.sidebar a{color:#c4cbe0;padding:11px 14px;border-radius:9px;font-size:.92rem;transition:.2s;font-weight:500}
.sidebar a:hover{background:var(--sidebar-hover);color:#fff;padding-left:18px}
.logout-link{margin-top:18px;border-top:1px solid #2a3152;padding-top:16px !important;color:#f87171 !important}

.admin-content{flex:1;padding:36px;min-width:0}
.admin-content h1{font-size:1.6rem;font-weight:800;margin-bottom:6px}
.admin-content h2{font-size:1.2rem;font-weight:700;margin:30px 0 14px;color:var(--text)}
.admin-content h3{font-size:1rem;font-weight:700;margin:20px 0 10px;color:var(--text-muted)}

.admin-form{
  display:flex;flex-wrap:wrap;gap:12px;background:var(--card);padding:22px;
  border-radius:14px;border:1px solid var(--border);margin-bottom:26px;
  box-shadow:0 6px 18px rgba(20,30,70,.05);
}
.admin-form input, .admin-form textarea, .admin-form select{
  padding:10px 14px;border:1px solid var(--border);border-radius:9px;font-family:inherit;
  flex:1;min-width:150px;font-size:.92rem;transition:.2s;background:#fbfcfe;
}
.admin-form input:focus, .admin-form textarea:focus, .admin-form select:focus{
  outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.15);background:#fff;
}
.admin-form textarea{width:100%;min-height:70px}
.admin-form label{width:100%;font-size:.85rem;font-weight:600;color:var(--text-muted);margin-bottom:-6px}

.btn{padding:11px 22px;border-radius:9px;border:0;cursor:pointer;font-weight:600;transition:.2s;font-size:.9rem}
.btn-primary{background:linear-gradient(90deg,var(--primary),var(--accent));color:#fff;box-shadow:0 6px 16px rgba(37,99,235,.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 22px rgba(37,99,235,.4)}
.btn-sm{padding:7px 14px;font-size:.82rem;border-radius:7px;border:1px solid var(--border);background:#f3f5fa;cursor:pointer;transition:.2s;font-weight:600}
.btn-sm:hover{background:var(--primary);color:#fff;border-color:var(--primary);transform:translateY(-1px)}
.btn-danger{background:#fee2e2;color:var(--danger);border-color:#fecaca}
.btn-danger:hover{background:var(--danger);color:#fff;border-color:var(--danger)}

.table-scroll{width:100%;overflow-x:auto;border-radius:14px}
.admin-table{width:100%;border-collapse:collapse;background:var(--card);border-radius:14px;overflow:hidden;margin-bottom:32px;min-width:640px;box-shadow:0 6px 18px rgba(20,30,70,.05)}
.admin-table th, .admin-table td{padding:14px 16px;border-bottom:1px solid var(--border);text-align:left;font-size:.88rem}
.admin-table th{background:#f7f9fd;font-weight:700;color:var(--text-muted);text-transform:uppercase;font-size:.72rem;letter-spacing:.4px}
.admin-table tr:hover td{background:#fafbff}
.admin-table input{width:100%;padding:7px 9px;border:1px solid var(--border);border-radius:7px}

.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:18px;margin:26px 0}
.stat-card{
  background:var(--card);padding:22px;border-radius:14px;border:1px solid var(--border);
  text-align:center;transition:.25s;box-shadow:0 6px 18px rgba(20,30,70,.05);
}
.stat-card:hover{transform:translateY(-4px);box-shadow:0 12px 26px rgba(20,30,70,.12)}
.stat-card h3{font-size:2rem;font-weight:800;background:linear-gradient(90deg,var(--primary),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.stat-card p{color:var(--text-muted);font-size:.85rem;font-weight:600;margin-top:4px}

.quick-links{background:var(--card);padding:18px 22px;border-radius:12px;border:1px solid var(--border);margin-top:10px}
.quick-links a{color:var(--primary);font-weight:600}
.quick-links a:hover{text-decoration:underline}

.badge{padding:4px 12px;border-radius:20px;font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.3px}
.badge-high{background:#fee2e2;color:#dc2626}
.badge-medium{background:#fef3c7;color:#b45309}
.badge-low{background:#dcfce7;color:#15803d}

.progress-summary{background:var(--card);padding:22px;border-radius:14px;border:1px solid var(--border);margin-bottom:30px;box-shadow:0 6px 18px rgba(20,30,70,.05)}
.progress-summary p{font-weight:600;margin-bottom:10px}
.skill-bar-track{height:12px;background:#eef1f6;border-radius:8px;overflow:hidden}
.skill-bar-fill{height:100%;background:linear-gradient(90deg,var(--primary),var(--accent));transition:width .4s}

.error{color:#dc2626;margin-bottom:14px;background:#fee2e2;padding:10px 16px;border-radius:8px;font-weight:600;font-size:.88rem}
.success{color:#15803d;margin-bottom:14px;background:#dcfce7;padding:10px 16px;border-radius:8px;font-weight:600;font-size:.88rem}

.login-body{
  display:flex;align-items:center;justify-content:center;height:100vh;padding:20px;
  background:
    radial-gradient(circle at 20% 20%, rgba(124,58,237,.25), transparent 45%),
    radial-gradient(circle at 80% 80%, rgba(37,99,235,.3), transparent 45%),
    var(--sidebar-bg);
}
.login-form{background:#fff;padding:40px;border-radius:16px;width:360px;max-width:100%;box-shadow:0 24px 60px rgba(0,0,0,.35)}
.login-form h2{font-size:1.4rem;font-weight:800;margin-bottom:8px}
.login-form label{display:block;margin:14px 0 6px;font-size:.85rem;font-weight:600;color:var(--text-muted)}
.login-form input{width:100%;padding:11px 14px;border:1px solid var(--border);border-radius:9px;font-size:.92rem}
.login-form input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.15)}
.login-form button{width:100%;margin-top:22px}

@media(max-width:900px){
  .mobile-topbar{display:flex}
  .sidebar{
    position:fixed;top:0;left:0;height:100vh;z-index:200;
    transform:translateX(-100%);transition:transform .3s ease;
    box-shadow:8px 0 30px rgba(0,0,0,.3);
  }
  .sidebar.open{transform:translateX(0)}
  .admin-content{padding:20px 16px;width:100%}
  .admin-form{flex-direction:column}
  .admin-form input, .admin-form textarea, .admin-form select{width:100%}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .login-form{padding:28px}
}
@media(max-width:480px){
  .stats-grid{grid-template-columns:1fr}
}