:root{--primary: #2563eb;--primary-dark: #1d4ed8;--accent: #f59e0b;--accent-light: #fbbf24;--bg: #f0f4f8;--sidebar-bg: #0a0f1e;--sidebar-text: #8b9cc8;--sidebar-active: #ffffff;--card-bg: #ffffff;--text: #1f2937;--text-muted: #6b7280;--border: #e5e7eb;--success: #10b981;--danger: #ef4444;--warning: #f59e0b}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,Segoe UI,sans-serif;background:var(--bg);color:var(--text);min-height:100vh}.layout{display:flex;min-height:100vh}.sidebar{width:260px;background:linear-gradient(180deg,#0a0f1e,#0d1535,#0a0f1e);min-height:100vh;display:flex;flex-direction:column;position:fixed;top:0;left:0;bottom:0;z-index:100;box-shadow:4px 0 40px #0006;border-right:1px solid rgba(255,255,255,.04);overflow:hidden}.sidebar:before{content:"";position:absolute;top:-80px;left:-80px;width:240px;height:240px;background:radial-gradient(circle,rgba(37,99,235,.25) 0%,transparent 70%);border-radius:50%;pointer-events:none}.sidebar:after{content:"";position:absolute;bottom:60px;right:-60px;width:180px;height:180px;background:radial-gradient(circle,rgba(245,158,11,.12) 0%,transparent 70%);border-radius:50%;pointer-events:none}.sidebar-logo{padding:1.75rem 1.5rem 1.25rem;border-bottom:1px solid rgba(255,255,255,.06);position:relative;background:transparent}.sidebar-logo h1{font-size:1.5rem;font-weight:900;background:linear-gradient(135deg,#fff,#93c5fd);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:-.5px}.sidebar-logo h1 span{background:linear-gradient(135deg,#f59e0b,#fbbf24);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.sidebar-logo p{font-size:.7rem;color:#8b9cc899;margin-top:4px;font-weight:500;text-transform:uppercase;letter-spacing:1.5px}.sidebar-nav{flex:1;padding:1rem .75rem;display:flex;flex-direction:column;gap:2px;overflow-y:auto;scrollbar-width:none}.sidebar-nav::-webkit-scrollbar{display:none}.nav-item{display:flex;align-items:center;gap:12px;padding:11px 14px;color:var(--sidebar-text);text-decoration:none;font-size:.875rem;font-weight:500;cursor:pointer;transition:all .2s ease;border-radius:10px;border:1px solid transparent;position:relative;overflow:hidden}.nav-item:before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:linear-gradient(180deg,#2563eb,#7c3aed);border-radius:0 3px 3px 0;opacity:0;transition:opacity .2s}.nav-item:hover{background:#ffffff0f;color:#fff;border-color:#ffffff0f;transform:translate(2px)}.nav-item.active{background:linear-gradient(135deg,#2563eb33,#7c3aed1f);color:#fff;border-color:#2563eb4d;font-weight:700;box-shadow:0 4px 20px #2563eb26}.nav-item.active:before{opacity:1}.nav-icon{font-size:1rem;width:22px;text-align:center;flex-shrink:0}.sidebar-footer{padding:1rem .75rem;border-top:1px solid rgba(255,255,255,.06)}.logout-btn{display:flex;align-items:center;gap:10px;width:100%;padding:11px 14px;background:#ef444414;border:1px solid rgba(239,68,68,.2);border-radius:10px;color:#fca5a5cc;font-size:.875rem;font-weight:600;cursor:pointer;transition:all .2s}.logout-btn:hover{background:#ef44442e;color:#fca5a5;border-color:#ef444466;transform:translate(2px)}.main-content{margin-left:260px;flex:1;padding:2rem;min-height:100vh}.page-header{margin-bottom:1.5rem}.page-header h2{font-size:1.5rem;font-weight:800;color:var(--text);display:flex;align-items:center;gap:10px}.page-header p{color:var(--text-muted);font-size:.88rem;margin-top:4px}.card{background:var(--card-bg);border-radius:12px;border:1px solid var(--border);box-shadow:0 2px 8px #0000000f}.card-header{padding:1rem 1.25rem;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}.card-header h3{font-size:.95rem;font-weight:700;display:flex;align-items:center;gap:8px}.card-body{padding:1.25rem}.stat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:1rem;margin-bottom:1.5rem}.stat-card{background:var(--card-bg);border:1px solid var(--border);border-radius:12px;padding:1.25rem;box-shadow:0 2px 8px #0000000d}.stat-card .stat-label{font-size:.78rem;color:var(--text-muted);font-weight:600;text-transform:uppercase;letter-spacing:.5px}.stat-card .stat-value{font-size:1.8rem;font-weight:800;margin:6px 0 2px;color:var(--primary)}.stat-card .stat-sub{font-size:.78rem;color:var(--text-muted)}.stat-card.green .stat-value{color:var(--success)}.stat-card.amber .stat-value{color:var(--warning)}.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:1.25rem;margin-bottom:1.25rem}.grid-3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:1.25rem;margin-bottom:1.25rem}@media (max-width: 900px){.grid-2,.grid-3{grid-template-columns:1fr}.sidebar{width:220px}.main-content{margin-left:220px}}.badge{display:inline-block;padding:3px 10px;border-radius:20px;font-size:.75rem;font-weight:700}.badge-green{background:#d1fae5;color:#065f46}.badge-red{background:#fee2e2;color:#991b1b}.badge-amber{background:#fef3c7;color:#92400e}.badge-blue{background:#dbeafe;color:#1e40af}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse;font-size:.88rem}thead th{background:#f8fafc;padding:10px 14px;text-align:left;font-size:.75rem;font-weight:700;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;border-bottom:1px solid var(--border)}tbody td{padding:12px 14px;border-bottom:1px solid var(--border);vertical-align:middle}tbody tr:last-child td{border-bottom:none}tbody tr:hover{background:#f8fafc}.form-group{margin-bottom:1.2rem}.form-group label{display:block;font-size:.85rem;font-weight:600;color:var(--text);margin-bottom:6px}.form-group input,.form-group select,.form-group textarea{width:100%;padding:10px 14px;border:1px solid var(--border);border-radius:8px;font-size:.9rem;color:var(--text);background:#fff;transition:border-color .2s;outline:none}.form-group input:focus,.form-group select:focus{border-color:var(--primary);box-shadow:0 0 0 3px #1e3a5f14}.btn{display:inline-flex;align-items:center;gap:7px;padding:10px 20px;border-radius:8px;font-size:.88rem;font-weight:700;cursor:pointer;border:none;transition:all .2s;outline:none}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark)}.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover{opacity:.85}.btn-outline{background:transparent;border:1px solid var(--border);color:var(--text)}.btn-outline:hover{background:var(--bg)}.btn-success{background:var(--success);color:#fff}.btn-sm{padding:6px 12px;font-size:.8rem}.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#0f172a,#1e293b,#0f172a);position:relative;overflow:hidden}.login-page:before{content:"";position:absolute;top:-150px;left:-150px;width:400px;height:400px;background:radial-gradient(circle,rgba(37,99,235,.3) 0%,transparent 70%);border-radius:50%;pointer-events:none}.login-page:after{content:"";position:absolute;bottom:-150px;right:-150px;width:500px;height:500px;background:radial-gradient(circle,rgba(245,158,11,.15) 0%,transparent 70%);border-radius:50%;pointer-events:none}.login-card{background:#fffffff2;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid rgba(255,255,255,.8);border-radius:24px;padding:3rem;width:100%;max-width:420px;box-shadow:0 25px 50px -12px #00000080;position:relative;z-index:10;color:#1e293b;animation:slideUpFade .6s ease-out forwards}@keyframes slideUpFade{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.login-logo{display:block;margin:0 auto 1.5rem;max-height:110px;object-fit:contain}.login-card h1{font-size:1.8rem;font-weight:900;text-align:center;background:linear-gradient(135deg,#1e293b,#3b82f6);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:8px}.login-card p{color:#64748b;font-size:.95rem;text-align:center;margin-bottom:2rem}.login-form-group{margin-bottom:1.5rem;text-align:left}.login-form-group label{display:block;font-size:.85rem;font-weight:600;color:#475569;margin-bottom:8px;text-transform:uppercase;letter-spacing:.5px}.login-form-group input{width:100%;padding:14px 16px;background:#fff;border:1px solid #cbd5e1;border-radius:12px;font-size:1rem;color:#1e293b;transition:all .3s;outline:none}.login-form-group input::placeholder{color:#94a3b8}.login-form-group input:focus{border-color:#3b82f6;background:#fff;box-shadow:0 0 0 4px #3b82f626}.login-btn{width:100%;padding:14px;background:linear-gradient(135deg,#2563eb,#1d4ed8);color:#fff;border:none;border-radius:12px;font-size:1rem;font-weight:700;cursor:pointer;transition:all .3s;box-shadow:0 4px 12px #2563eb4d;display:flex;align-items:center;justify-content:center;gap:8px}.login-btn:hover{transform:translateY(-2px);box-shadow:0 6px 16px #2563eb66}.login-btn:active{transform:translateY(0)}.login-btn:disabled{opacity:.7;cursor:not-allowed;transform:none}.rank-list{display:flex;flex-direction:column;gap:8px}.rank-item{display:flex;align-items:center;justify-content:space-between;padding:8px 12px;background:#f8fafc;border-radius:8px;font-size:.88rem}.rank-item .rank-num{width:24px;height:24px;background:var(--primary);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.75rem;font-weight:800;flex-shrink:0}.filter-bar{display:flex;gap:12px;align-items:center;margin-bottom:1.25rem;flex-wrap:wrap}.filter-bar select,.filter-bar input{padding:8px 12px;border:1px solid var(--border);border-radius:8px;font-size:.88rem;outline:none;background:#fff;cursor:pointer}.loader{display:flex;align-items:center;justify-content:center;padding:3rem;color:var(--text-muted);gap:10px}.spinner{width:24px;height:24px;border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:3rem;color:var(--text-muted);text-align:center}.empty-state .empty-icon{font-size:3rem;margin-bottom:1rem}