*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--bg:#f5f6fa;--sidebar:#1e293b;--sidebar-w:200px;--primary:#4f6ef7;--primary-hover:#3b5de7;--danger:#e74c3c;--success:#27ae60;--warning:#f39c12;--info:#3498db;--text:#333;--muted:#888;--border:#e2e5ea;--card-bg:#fff;--radius:6px;--font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif}
html{font-size:14px}
body{font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.5}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}

/* Layout */
.layout{display:flex;min-height:100vh}
.sidebar{width:var(--sidebar-w);background:var(--sidebar);color:#cbd5e1;position:fixed;top:0;left:0;bottom:0;overflow-y:auto;z-index:100;transition:transform .2s}
.sidebar-brand{padding:16px;font-weight:700;font-size:15px;color:#fff;display:flex;align-items:center;gap:8px;border-bottom:1px solid rgba(255,255,255,.1)}
.sidebar-section{padding:6px 12px;font-size:10px;text-transform:uppercase;letter-spacing:.5px;color:#64748b;margin-top:12px}
.sidebar-nav{list-style:none;padding:4px 8px}
.sidebar-nav a{display:flex;align-items:center;gap:8px;padding:7px 10px;border-radius:var(--radius);color:#94a3b8;font-size:13px;transition:background .15s,color .15s}
.sidebar-nav a:hover,.sidebar-nav a.active{background:rgba(255,255,255,.08);color:#fff;text-decoration:none}
.sidebar-nav a.active{background:var(--primary);color:#fff}
.main{margin-left:var(--sidebar-w);flex:1;display:flex;flex-direction:column;min-height:100vh}

/* Topbar */
.topbar{display:flex;align-items:center;justify-content:space-between;padding:10px 24px;background:var(--card-bg);border-bottom:1px solid var(--border)}
.topbar-right{display:flex;align-items:center;gap:12px}
.topbar .user-email{font-size:13px;color:var(--muted)}
.hamburger{display:none;background:none;border:none;font-size:20px;cursor:pointer;padding:4px 8px}
.overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.3);z-index:99}

/* Content */
.content{padding:20px 24px;flex:1}
.page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;flex-wrap:wrap;gap:8px}
.page-title{font-size:18px;font-weight:600}

/* Cards */
.card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:16px}
.card-body{padding:16px}
.card-header{padding:10px 16px;border-bottom:1px solid var(--border);font-weight:600;font-size:13px}
.card-footer{padding:10px 16px;border-top:1px solid var(--border)}

/* Stat cards */
.stat-card{border-left:3px solid var(--primary);padding:14px 16px;background:var(--card-bg);border-radius:var(--radius);border:1px solid var(--border)}
.stat-label{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.3px;color:var(--muted);margin-bottom:4px}
.stat-value{font-size:16px;font-weight:700}

/* Tables */
.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse}
table th{font-size:11px;font-weight:600;text-transform:uppercase;color:var(--muted);padding:8px 12px;border-bottom:2px solid var(--border);text-align:left}
table td{padding:8px 12px;border-bottom:1px solid var(--border);vertical-align:middle}
table tr:hover{background:#f8f9fb}
table tr:last-child td{border-bottom:none}
.text-center{text-align:center}
.text-right{text-align:right}
.text-muted{color:var(--muted)}
.text-nowrap{white-space:nowrap}
.empty-row{text-align:center;color:var(--muted);padding:32px 12px !important}

/* Forms */
label{display:block;font-size:12px;font-weight:600;color:#555;margin-bottom:4px}
input[type="text"],input[type="email"],input[type="password"],input[type="number"],input[type="date"],input[type="tel"],select,textarea{width:100%;padding:7px 10px;border:1px solid var(--border);border-radius:var(--radius);font-size:13px;font-family:var(--font);background:#fff;transition:border-color .15s}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--primary)}
.form-group{margin-bottom:12px}
.form-row{display:grid;gap:12px}
.form-row-2{grid-template-columns:1fr 1fr}
.form-row-3{grid-template-columns:1fr 1fr 1fr}
.form-row-4{grid-template-columns:1fr 1fr 1fr 1fr}
.form-inline{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.is-invalid{border-color:var(--danger)}
.invalid-feedback{color:var(--danger);font-size:12px;margin-top:2px}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:4px;padding:7px 14px;border:1px solid transparent;border-radius:var(--radius);font-size:13px;font-weight:500;cursor:pointer;font-family:var(--font);transition:background .15s,border-color .15s;text-decoration:none;line-height:1.4}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary)}
.btn-primary:hover{background:var(--primary-hover)}
.btn-danger{background:var(--danger);color:#fff;border-color:var(--danger)}
.btn-danger:hover{background:#c0392b}
.btn-warning{background:var(--warning);color:#fff;border-color:var(--warning)}
.btn-warning:hover{background:#e08e0b}
.btn-light{background:#fff;color:var(--text);border-color:var(--border)}
.btn-light:hover{background:#f5f5f5}
.btn-outline{background:transparent;color:var(--primary);border-color:var(--primary)}
.btn-outline:hover{background:var(--primary);color:#fff}
.btn-sm{padding:4px 10px;font-size:12px}
.btn-block{display:flex;width:100%;justify-content:center}
.btn-icon{background:none;border:none;cursor:pointer;padding:2px 6px;color:var(--muted);font-size:14px}
.btn-icon:hover{color:var(--text)}

/* Badges */
.badge{display:inline-block;padding:2px 8px;border-radius:10px;font-size:11px;font-weight:600}
.badge-success{background:#d4edda;color:#155724}
.badge-danger{background:#f8d7da;color:#721c24}
.badge-secondary{background:#e9ecef;color:#495057}
.badge-warning{background:#fff3cd;color:#856404}

/* Alerts */
.alert{padding:10px 14px;border-radius:var(--radius);margin-bottom:12px;font-size:13px;display:flex;align-items:center;justify-content:space-between}
.alert-success{background:#d4edda;color:#155724;border:1px solid #c3e6cb}
.alert-danger{background:#f8d7da;color:#721c24;border:1px solid #f5c6cb}
.alert-warning{background:#fff3cd;color:#856404;border:1px solid #ffeeba}
.alert-info{background:#d1ecf1;color:#0c5460;border:1px solid #bee5eb}
.alert .close-btn{background:none;border:none;font-size:18px;cursor:pointer;color:inherit;opacity:.5;line-height:1}
.alert .close-btn:hover{opacity:1}

/* Modal */
.modal-backdrop{display:none;position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:200;align-items:center;justify-content:center}
.modal-backdrop.show{display:flex}
.modal{background:var(--card-bg);border-radius:var(--radius);width:90%;max-width:480px;max-height:90vh;overflow-y:auto;box-shadow:0 8px 30px rgba(0,0,0,.15)}
.modal-lg{max-width:640px}
.modal-sm{max-width:360px}
.modal-header{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-bottom:1px solid var(--border)}
.modal-header h3{font-size:15px;font-weight:600}
.modal-body{padding:16px}
.modal-footer{padding:10px 16px;border-top:1px solid var(--border);display:flex;justify-content:flex-end;gap:8px}

/* Tabs */
.tabs{display:flex;border-bottom:2px solid var(--border);margin-bottom:0}
.tab{padding:8px 16px;font-size:13px;font-weight:500;color:var(--muted);cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-2px;background:none;border-top:none;border-left:none;border-right:none}
.tab:hover{color:var(--text)}
.tab.active{color:var(--primary);border-bottom-color:var(--primary)}
.tab-pane{display:none}
.tab-pane.active{display:block}

/* Pagination */
.pagination{display:flex;gap:4px;list-style:none;padding:0;margin:0;flex-wrap:wrap}
.pagination a,.pagination span{padding:5px 10px;border:1px solid var(--border);border-radius:var(--radius);font-size:12px;color:var(--text)}
.pagination a:hover{background:#f0f0f0;text-decoration:none}
.pagination .active span{background:var(--primary);color:#fff;border-color:var(--primary)}
.pagination .disabled span{color:#ccc}

/* Grid */
.grid{display:grid;gap:16px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}

/* Utilities */
.mt-1{margin-top:4px}.mt-2{margin-top:8px}.mt-3{margin-top:16px}.mt-4{margin-top:24px}
.mb-1{margin-bottom:4px}.mb-2{margin-bottom:8px}.mb-3{margin-bottom:16px}.mb-4{margin-bottom:24px}
.mr-1{margin-right:4px}.mr-2{margin-right:8px}
.gap-2{gap:8px}.gap-3{gap:16px}
.flex{display:flex}.items-center{align-items:center}.justify-between{justify-content:space-between}.flex-wrap{flex-wrap:wrap}
.hidden{display:none}
.w-full{width:100%}

/* Footer */
.footer{padding:12px 24px;text-align:center;font-size:12px;color:var(--muted);border-top:1px solid var(--border)}

/* Login page */
.login-page{display:flex;align-items:center;justify-content:center;min-height:100vh;background:var(--bg)}
.login-card{background:var(--card-bg);border-radius:var(--radius);padding:32px;width:100%;max-width:380px;border:1px solid var(--border)}
.login-title{font-size:20px;font-weight:700;text-align:center;margin-bottom:24px}

/* Responsive */
@media(max-width:768px){
    .sidebar{transform:translateX(-100%)}
    .sidebar.open{transform:translateX(0)}
    .overlay.show{display:block}
    .main{margin-left:0}
    .hamburger{display:block}
    .content{padding:16px}
    .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
    .form-row-2,.form-row-3,.form-row-4{grid-template-columns:1fr}
    .page-header{flex-direction:column;align-items:flex-start}
}
@media(min-width:769px) and (max-width:1024px){
    .grid-4{grid-template-columns:repeat(2,1fr)}
    .form-row-4{grid-template-columns:1fr 1fr}
}