:root{--primary:#1e3a8a;--primary-light:#3b82f6;--primary-dark:#172554;--secondary:#f59e0b;--secondary-light:#fbbf24;--bg-main:#f3f4f6;--bg-card:#fff;--text-main:#1f2937;--text-muted:#6b7280;--text-light:#fff;--success:#10b981;--danger:#ef4444;--warning:#f59e0b;--info:#3b82f6;--sidebar-width:260px;--header-height:70px;--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000001a, 0 2px 4px -1px #0000000f;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -2px #0000000d;--transition:all .3s ease}body{background-color:var(--bg-main);color:var(--text-main);margin:0;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}*{box-sizing:border-box}a{color:inherit;text-decoration:none}button{cursor:pointer;background:0 0;border:none;font-family:inherit}input,textarea,select{font-family:inherit}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:#f1f1f1}::-webkit-scrollbar-thumb{background:#c1c1c1;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--primary-light)}.glass{-webkit-backdrop-filter:blur(10px);background:#ffffffb3;border:1px solid #ffffff2e}.btn{border-radius:var(--radius-sm);transition:var(--transition);justify-content:center;align-items:center;padding:.6rem 1.2rem;font-size:.95rem;font-weight:600;display:inline-flex}.btn-primary{background-color:var(--primary);color:#fff;box-shadow:0 4px 14px #1e3a8a63}.btn-primary:hover{background-color:var(--primary-light);transform:translateY(-1px);box-shadow:0 6px 20px #1e3a8a3b}.btn-secondary{background-color:var(--secondary);color:#fff;box-shadow:0 4px 14px #f59e0b63}.btn-secondary:hover{background-color:var(--secondary-light);transform:translateY(-1px)}.btn-danger{background-color:var(--danger);color:#fff}.btn-danger:hover{background-color:#dc2626;transform:translateY(-1px)}.auth-container{background-color:var(--bg-main);width:100vw;height:100vh;display:flex}.auth-left{background:linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);color:#fff;text-align:center;flex-direction:column;flex:1;justify-content:center;align-items:center;padding:2rem;display:flex}.auth-left h1{text-shadow:0 2px 4px #0003;margin-bottom:1rem;font-size:2.5rem;font-weight:800}.auth-left p{opacity:.9;max-width:400px;font-size:1.1rem}.hien-badge{letter-spacing:1px;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);background:#fff3;border:1px solid #ffffff4d;border-radius:20px;margin-bottom:2rem;padding:.5rem 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.8rem;font-size:.95rem}.btn{padding:.5rem 1rem;font-size:.85rem}}@media (width<=480px){.auth-left{padding:1.5rem 1rem}.auth-left h1{font-size:1.5rem}.hien-badge{padding:.4rem .8rem;font-size:.8rem}.auth-box{padding:1rem}}.admin-layout{width:100vw;height:100vh;display:flex;overflow:hidden}.sidebar{width:var(--sidebar-width);transition:var(--transition);z-index:100;background-color:#fff;border-right:1px solid #e5e7eb;flex-direction:column;flex-shrink:0;display:flex}.sidebar-header{height:var(--header-height);background:linear-gradient(90deg,#f8fafc,#fff);border-bottom:1px solid #e5e7eb;justify-content:space-between;align-items:center;padding:0 1.5rem;display:flex}.sidebar-header h2{color:var(--primary);letter-spacing:-.5px;margin:0;font-size:1.25rem;font-weight:800}.sidebar-close-btn{color:var(--text-muted);transition:var(--transition);border-radius:6px;padding:.3rem;font-size:1.2rem;display:none}.sidebar-close-btn:hover{color:var(--danger);background:#f1f5f9}.sidebar-menu{flex:1;padding:1rem .75rem;overflow-y:auto}.menu-section-title{color:var(--text-muted);text-transform:uppercase;margin:1.5rem 0 .5rem 1rem;font-size:.75rem;font-weight:600}.menu-item{color:var(--text-muted);border-radius:var(--radius-md);transition:var(--transition);white-space:nowrap;align-items:center;margin-bottom:.3rem;padding:.75rem 1rem;font-weight:500;display:flex}.menu-item:hover{color:var(--primary);background-color:#f1f5f9}.menu-item.active{color:var(--primary);background-color:#3b82f61a;font-weight:600}.menu-icon{text-align:center;flex-shrink:0;width:24px;margin-right:.75rem;font-size:1.25rem}.burger-btn{transition:var(--transition);border-radius:8px;flex-direction:column;justify-content:center;gap:5px;padding:.5rem;display:none}.burger-btn:hover{background:#f1f5f9}.burger-btn span{background:var(--text-main);width:22px;height:2.5px;transition:var(--transition);border-radius:2px;display:block}.sidebar-overlay{z-index:99;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);background:#00000080;display:none;position:fixed;inset:0}.main-wrapper{background-color:var(--bg-main);flex-direction:column;flex:1;min-width:0;display:flex}.top-header{height:var(--header-height);box-shadow:var(--shadow-sm);z-index:5;background-color:#fff;border-bottom:1px solid #e5e7eb;flex-shrink:0;justify-content:space-between;align-items:center;padding:0 1.5rem;display:flex}.header-title{color:var(--text-main);white-space:nowrap;margin:0;font-size:1.15rem;font-weight:700}.user-profile{align-items:center;gap:.5rem;display:flex}.btn-header-action{background:#f1f5f9;border:2px solid #0000;border-radius:8px;justify-content:center;align-items:center;width:36px;height:36px;font-size:1rem;transition:all .25s;display:flex}.btn-header-action:hover{background:var(--primary);border-color:var(--primary);transform:translateY(-2px);box-shadow:0 4px 12px #1e3a8a4d}.avatar{background-color:var(--secondary-light);color:#fff;width:40px;height:40px;box-shadow:0 0 0 2px var(--primary-light);border:2px solid #fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:1.2rem;font-weight:700;display:flex}.notif-bell-wrapper{position:relative}.notif-bell-btn{cursor:pointer;font-size:1.1rem;position:relative}.notif-badge{color:#fff;text-align:center;pointer-events:none;background:#ef4444;border-radius:99px;min-width:16px;height:16px;padding:0 4px;font-size:.6rem;font-weight:800;line-height:16px;animation:.3s popIn;position:absolute;top:-4px;right:-4px}.notif-dropdown{z-index:1000;background:#fff;border:1px solid #e2e8f0;border-radius:12px;width:340px;max-height:420px;animation:.2s fadeSlideDown;position:absolute;top:calc(100% + 8px);right:0;overflow:hidden;box-shadow:0 10px 40px #00000026}.notif-dropdown-header{border-bottom:1px solid #f1f5f9;justify-content:space-between;align-items:center;padding:.8rem 1rem;font-size:.95rem;display:flex}.notif-clear-btn{color:var(--primary-light);cursor:pointer;font-size:.75rem;font-weight:600}.notif-clear-btn:hover{color:var(--danger)}.notif-dropdown-body{max-height:350px;overflow-y:auto}.notif-empty{text-align:center;color:var(--text-muted);padding:2rem 1rem}.notif-empty p{margin:.5rem 0 0;font-size:.85rem}.notif-item{cursor:pointer;border-bottom:1px solid #f8fafc;gap:.7rem;padding:.7rem 1rem;transition:background .15s;display:flex}.notif-item:hover{background:#f1f5f9}.notif-item.notif-unread{background:#eff6ff}.notif-item-icon{flex-shrink:0;margin-top:2px;font-size:1.3rem}.notif-item-content{flex:1;min-width:0}.notif-item-msg{color:var(--text-main);font-size:.82rem;font-weight:500;line-height:1.4}.notif-item-time{color:var(--text-muted);margin-top:2px;font-size:.7rem}@keyframes fadeSlideDown{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}@keyframes popIn{0%{transform:scale(0)}to{transform:scale(1)}}.user-info{flex-direction:column;display:flex}.user-info .name{color:var(--text-main);font-size:.95rem;font-weight:600}.user-info .role{color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;font-size:.75rem}.content-area{flex:1;padding:1.5rem;overflow:hidden auto}.page-header{flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:1rem;margin-bottom:2rem;display:flex}.page-header h1{color:var(--text-main);margin:0 0 .5rem;font-size:1.8rem}.page-header p{color:var(--text-muted);margin:0}.card{border-radius:var(--radius-lg);box-shadow:var(--shadow-md);background:#fff;border:1px solid #00000005;padding:1.5rem}@media (width<=1024px){.content-area{padding:1.2rem}.page-header h1{font-size:1.5rem}.user-info{display:none}.header-title{font-size:1rem}}@media (width<=768px){.sidebar{width:280px;height:100vh;box-shadow:none;transition:transform .3s;position:fixed;top:0;left:0;transform:translate(-100%)}.sidebar.sidebar-open{transform:translate(0);box-shadow:4px 0 20px #00000026}.sidebar-close-btn,.sidebar-overlay{display:block}.burger-btn{display:flex}.top-header{height:56px;padding:0 1rem}.header-title{font-size:.9rem}.user-info{display:none}.avatar{width:32px;height:32px;font-size:.9rem}.btn-logout{padding:.3rem .6rem!important;font-size:.7rem!important}.content-area{padding:1rem}.page-header{flex-direction:column;align-items:flex-start}.page-header h1{font-size:1.3rem}.card{border-radius:var(--radius-md);padding:1rem}.card table{font-size:.8rem}.card table th,.card table td{padding:.5rem .6rem}}@media (width<=480px){.sidebar{width:100%}.top-header{height:50px;padding:0 .8rem}.header-title{font-size:.8rem}.content-area{padding:.8rem}.page-header h1{font-size:1.1rem}}