:root {
  --primary:       #0f766e;
  --primary-dark:  #0d5f58;
  --primary-light: #14b8a6;
  --primary-50:    #f0fdfa;
  --primary-100:   #ccfbf1;
  --accent:        #f59e0b;
  --danger:        #dc2626;
  --danger-light:  #fee2e2;
  --success:       #16a34a;
  --success-light: #dcfce7;
  --warning:       #d97706;
  --warning-light: #fef3c7;
  --info:          #0369a1;
  --info-light:    #e0f2fe;
  --gray-50:   #f8fafc; --gray-100: #f1f5f9; --gray-200: #e2e8f0;
  --gray-300:  #cbd5e1; --gray-400: #94a3b8; --gray-500: #64748b;
  --gray-600:  #475569; --gray-700: #334155; --gray-800: #1e293b;
  --gray-900:  #0f172a; --white: #ffffff;
  --sidebar-w: 240px; --navbar-h: 60px;
  --radius: 8px; --radius-lg: 12px; --radius-xl: 16px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.08);
  --shadow:    0 4px 12px rgba(0,0,0,.10);
  --shadow-lg: 0 8px 24px rgba(0,0,0,.12);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Segoe UI',system-ui,-apple-system,sans-serif;font-size:14px;line-height:1.6;color:var(--gray-800);background:var(--gray-50);min-height:100vh}
a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}
ul{list-style:none}
h1{font-size:1.75rem;font-weight:700}h2{font-size:1.4rem;font-weight:600}h3{font-size:1.15rem;font-weight:600}
.text-sm{font-size:.85rem}.text-xs{font-size:.75rem}
.text-muted{color:var(--gray-500)}.text-primary{color:var(--primary)}
.text-danger{color:var(--danger)}.text-success{color:var(--success)}
.fw-600{font-weight:600}.fw-700{font-weight:700}

/* Layout */
.navbar{position:fixed;top:0;left:0;right:0;z-index:100;height:var(--navbar-h);background:var(--primary);display:flex;align-items:center;padding:0 1.25rem;box-shadow:var(--shadow)}
.navbar-brand{display:flex;align-items:center;gap:.6rem;color:#fff;font-size:1.2rem;font-weight:700;text-decoration:none}
.navbar-brand:hover{color:var(--primary-100);text-decoration:none}
.navbar-right{margin-left:auto;display:flex;align-items:center;gap:.75rem}
.navbar-user{display:flex;align-items:center;gap:.5rem;color:var(--primary-100);font-size:.85rem}
.avatar{width:34px;height:34px;border-radius:50%;background:var(--primary-light);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:.78rem;flex-shrink:0}
.navbar-toggle{display:none;background:none;border:none;color:#fff;cursor:pointer;padding:.25rem}

.sidebar{position:fixed;top:var(--navbar-h);left:0;bottom:0;width:var(--sidebar-w);background:#fff;border-right:1px solid var(--gray-200);overflow-y:auto;z-index:90;transition:transform .25s ease}
.sidebar-section{padding:.75rem 0 .5rem}
.sidebar-label{font-size:.7rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--gray-400);padding:0 1rem .4rem}
.sidebar-item{display:flex;align-items:center;gap:.6rem;padding:.6rem 1rem;color:var(--gray-600);font-size:.875rem;cursor:pointer;border-left:3px solid transparent;transition:all .15s}
.sidebar-item:hover,.sidebar-item.active{background:var(--primary-50);color:var(--primary);border-left-color:var(--primary);text-decoration:none}
.sidebar-item.active{font-weight:600}

.main-content{margin-left:var(--sidebar-w);margin-top:var(--navbar-h);padding:1.75rem;flex:1;min-width:0}
.page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:1.5rem;flex-wrap:wrap;gap:.75rem}
.page-title{font-size:1.35rem;font-weight:700;color:var(--gray-800)}
.page-subtitle{font-size:.85rem;color:var(--gray-500);margin-top:.15rem}

/* Cards */
.card{background:#fff;border:1px solid var(--gray-200);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm)}
.card-header{display:flex;align-items:center;justify-content:space-between;padding:1rem 1.25rem;border-bottom:1px solid var(--gray-100)}
.card-title{font-size:1rem;font-weight:600;color:var(--gray-800)}
.card-body{padding:1.25rem}
.card-footer{padding:.875rem 1.25rem;border-top:1px solid var(--gray-100);background:var(--gray-50);border-radius:0 0 var(--radius-lg) var(--radius-lg)}
.mb-2{margin-bottom:.75rem}.mb-3{margin-bottom:1rem}.mb-4{margin-bottom:1.5rem}
.mt-2{margin-top:.75rem}.mt-3{margin-top:1rem}

/* Stats grid */
.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;margin-bottom:1.5rem}
.stat-card{background:#fff;border:1px solid var(--gray-200);border-radius:var(--radius-lg);padding:1.25rem;display:flex;align-items:flex-start;gap:1rem;box-shadow:var(--shadow-sm)}
.stat-icon{width:46px;height:46px;border-radius:var(--radius);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.stat-icon.teal{background:var(--primary-100);color:var(--primary)}
.stat-icon.green{background:var(--success-light);color:var(--success)}
.stat-icon.amber{background:var(--warning-light);color:var(--warning)}
.stat-icon.blue{background:var(--info-light);color:var(--info)}
.stat-value{font-size:1.6rem;font-weight:700;line-height:1;color:var(--gray-900)}
.stat-label{font-size:.8rem;color:var(--gray-500);margin-top:.25rem}
.stat-change{font-size:.75rem;color:var(--gray-500);margin-top:.3rem}
.stat-change.up{color:var(--success)}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:.4rem;padding:.5rem 1rem;font-size:.875rem;font-weight:500;border:1px solid transparent;border-radius:var(--radius);cursor:pointer;transition:all .15s;text-decoration:none;white-space:nowrap;line-height:1.4}
.btn:hover{text-decoration:none}.btn:disabled{opacity:.55;cursor:not-allowed}
.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary)}.btn-primary:hover{background:var(--primary-dark);color:#fff}
.btn-secondary{background:var(--gray-100);color:var(--gray-700);border-color:var(--gray-300)}.btn-secondary:hover{background:var(--gray-200)}
.btn-success{background:var(--success);color:#fff}.btn-success:hover{background:#15803d;color:#fff}
.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover{background:#b91c1c;color:#fff}
.btn-warning{background:var(--warning);color:#fff}
.btn-outline{background:transparent;color:var(--primary);border-color:var(--primary)}.btn-outline:hover{background:var(--primary);color:#fff}
.btn-sm{padding:.3rem .7rem;font-size:.8rem}.btn-lg{padding:.7rem 1.5rem;font-size:1rem}
.btn-block{width:100%;justify-content:center}

/* Forms */
.form-group{margin-bottom:1.1rem}
.form-label{display:block;font-size:.875rem;font-weight:500;color:var(--gray-700);margin-bottom:.35rem}
.required{color:var(--danger);margin-left:2px}
.form-control{width:100%;padding:.55rem .85rem;font-size:.875rem;color:var(--gray-800);background:#fff;border:1px solid var(--gray-300);border-radius:var(--radius);transition:border-color .15s,box-shadow .15s;line-height:1.5}
.form-control:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(15,118,110,.12)}
.form-control:disabled{background:var(--gray-50);cursor:not-allowed}
select.form-control{cursor:pointer}
textarea.form-control{resize:vertical;min-height:80px}
.form-hint{font-size:.78rem;color:var(--gray-500);margin-top:.25rem}
.form-error{font-size:.78rem;color:var(--danger);margin-top:.25rem;display:block}
.form-check{display:flex;align-items:center;gap:.5rem;cursor:pointer}
.form-check input{width:16px;height:16px;accent-color:var(--primary);cursor:pointer}
.form-check-label{font-size:.875rem;color:var(--gray-700);cursor:pointer}

/* Grid */
.row{display:flex;flex-wrap:wrap;margin:-.5rem}
.col{flex:1;min-width:0;padding:.5rem}
.col-4{flex:0 0 calc(33.33% - 1rem);padding:.5rem}
.col-6{flex:0 0 calc(50% - 1rem);padding:.5rem}
.col-8{flex:0 0 calc(66.66% - 1rem);padding:.5rem}
.col-12{flex:0 0 calc(100% - 1rem);padding:.5rem}

/* Table */
.table-wrapper{overflow-x:auto;border-radius:var(--radius-lg)}
.table{width:100%;border-collapse:collapse;font-size:.875rem}
.table th{background:var(--gray-50);padding:.75rem 1rem;text-align:left;font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.04em;color:var(--gray-500);border-bottom:1px solid var(--gray-200);white-space:nowrap}
.table td{padding:.8rem 1rem;border-bottom:1px solid var(--gray-100);color:var(--gray-700);vertical-align:middle}
.table tbody tr:hover td{background:var(--primary-50)}
.table tbody tr:last-child td{border-bottom:none}

/* Badges */
.badge{display:inline-flex;align-items:center;padding:.2rem .6rem;font-size:.72rem;font-weight:600;border-radius:20px;white-space:nowrap}
.badge-primary{background:var(--primary-100);color:var(--primary-dark)}
.badge-success{background:var(--success-light);color:var(--success)}
.badge-danger{background:var(--danger-light);color:var(--danger)}
.badge-warning{background:var(--warning-light);color:var(--warning)}
.badge-info{background:var(--info-light);color:var(--info)}
.badge-gray{background:var(--gray-100);color:var(--gray-600)}

/* Alerts */
.alert{padding:.85rem 1rem;border-radius:var(--radius);font-size:.875rem;margin-bottom:1rem;border:1px solid transparent}
.alert-success{background:var(--success-light);color:#14532d;border-color:#bbf7d0}
.alert-danger{background:var(--danger-light);color:#7f1d1d;border-color:#fecaca}
.alert-warning{background:var(--warning-light);color:#78350f;border-color:#fde68a}
.alert-info{background:var(--info-light);color:#0c4a6e;border-color:#bae6fd}

/* Modals */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:200;display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transition:all .2s}
.modal-overlay.active{opacity:1;visibility:visible}
.modal{background:#fff;border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);width:90%;max-width:520px;max-height:90vh;overflow-y:auto;transform:translateY(-16px);transition:transform .2s}
.modal-overlay.active .modal{transform:translateY(0)}
.modal-header{display:flex;align-items:center;justify-content:space-between;padding:1.25rem;border-bottom:1px solid var(--gray-200)}
.modal-title{font-size:1.05rem;font-weight:600}
.modal-close{background:none;border:none;cursor:pointer;color:var(--gray-500);font-size:1.3rem;line-height:1}
.modal-body{padding:1.25rem}
.modal-footer{padding:1rem 1.25rem;border-top:1px solid var(--gray-100);display:flex;gap:.6rem;justify-content:flex-end}

/* Progress */
.progress{height:8px;background:var(--gray-200);border-radius:4px;overflow:hidden}
.progress-bar{height:100%;background:var(--primary);border-radius:4px;transition:width .3s;width:0}
.progress-bar.warning{background:var(--warning)}
.progress-bar.danger{background:var(--danger)}

/* Upload zone */
.upload-zone{border:2px dashed var(--gray-300);border-radius:var(--radius-lg);padding:2rem;text-align:center;cursor:pointer;transition:all .15s;background:var(--gray-50)}
.upload-zone:hover{border-color:var(--primary);background:var(--primary-50)}
.upload-zone-title{font-weight:600;color:var(--gray-600);margin-bottom:.25rem}
.upload-zone-hint{font-size:.8rem;color:var(--gray-400)}

/* Filter bar */
.filter-bar{display:flex;align-items:center;gap:.75rem;flex-wrap:wrap;margin-bottom:1.25rem}
.search-box{position:relative}
.search-box svg{position:absolute;left:.7rem;top:50%;transform:translateY(-50%);color:var(--gray-400)}
.search-box input{width:100%;padding:.5rem .85rem .5rem 2.2rem;border:1px solid var(--gray-300);border-radius:var(--radius);font-size:.875rem}
.search-box input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(15,118,110,.12)}

/* Limit bars */
.limit-item{margin-bottom:1rem}
.limit-header{display:flex;justify-content:space-between;font-size:.82rem;margin-bottom:.3rem}
.limit-label{color:var(--gray-600);font-weight:500}
.limit-count{color:var(--gray-400)}

/* Auth pages */
.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 50%,#064e3b 100%);padding:1rem}
.auth-card{background:#fff;border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);width:100%;max-width:420px;padding:2rem}
.auth-title{font-size:1.4rem;font-weight:700;text-align:center;color:var(--gray-800);margin-bottom:.25rem}
.auth-subtitle{font-size:.875rem;color:var(--gray-500);text-align:center;margin-bottom:1.5rem}

/* Toast */
.toast-container{position:fixed;bottom:1.5rem;right:1.5rem;z-index:300;display:flex;flex-direction:column;gap:.5rem}
.toast{background:var(--gray-800);color:#fff;padding:.75rem 1rem;border-radius:var(--radius);font-size:.875rem;box-shadow:var(--shadow-lg);display:flex;align-items:center;gap:.6rem;animation:slideIn .3s;max-width:320px}
.toast.success{background:var(--success)}.toast.error{background:var(--danger)}.toast.warning{background:var(--warning)}
@keyframes slideIn{from{transform:translateX(100%);opacity:0}to{transform:translateX(0);opacity:1}}

/* Empty state */
.empty-state{text-align:center;padding:2.5rem 1rem;color:var(--gray-400)}
.empty-state-title{font-size:1rem;font-weight:600;color:var(--gray-600);margin-bottom:.35rem}

/* Utilities */
.d-flex{display:flex}.align-center{align-items:center}.justify-between{justify-content:space-between}.justify-end{justify-content:flex-end}
.gap-1{gap:.4rem}.gap-2{gap:.75rem}.flex-wrap{flex-wrap:wrap}.flex-1{flex:1}
.text-right{text-align:right}.text-center{text-align:center}
.w-100{width:100%}.divider{height:1px;background:var(--gray-200);margin:1rem 0}

/* Responsive */
@media(max-width:768px){
  :root{--sidebar-w:0px}
  .sidebar{transform:translateX(-240px);width:240px;box-shadow:var(--shadow-lg)}
  .sidebar.open{transform:translateX(0)}
  .main-content{margin-left:0;padding:1rem}
  .navbar-toggle{display:flex}
  .col-4,.col-6,.col-8{flex:0 0 calc(100% - 1rem)}
  .stats-grid{grid-template-columns:1fr 1fr}
  .page-header{flex-direction:column;align-items:flex-start}
  .navbar-user span{display:none}
  .modal{max-width:95vw}
  .filter-bar{flex-direction:column}
  .filter-bar .search-box{width:100%}
  .table th,.table td{padding:.55rem .6rem;font-size:.8rem}
  .btn{padding:.45rem .8rem;font-size:.82rem}
  .stat-card{padding:.875rem}
  .stat-value{font-size:1.3rem}
  .card-header{flex-wrap:wrap;gap:.5rem}
  .d-flex.gap-2{flex-wrap:wrap}
}
@media(max-width:480px){
  .stats-grid{grid-template-columns:1fr}
  .auth-card{padding:1.5rem}
  .page-title{font-size:1.1rem}
  .stat-card{padding:.75rem}
  .table th{font-size:.72rem}
  .badge{font-size:.68rem;padding:.15rem .45rem}
  .btn-sm{padding:.25rem .55rem;font-size:.76rem}
  .modal-body{padding:1rem}
  .main-content{padding:.75rem}
}