*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#2563eb;--primary-dark:#1d4ed8;--primary-light:#dbeafe;
  --success:#16a34a;--success-light:#dcfce7;
  --danger:#dc2626;--danger-light:#fee2e2;
  --warning:#f59e0b;--warning-light:#fef3c7;
  --gray-50:#f9fafb;--gray-100:#f3f4f6;--gray-200:#e5e7eb;
  --gray-300:#d1d5db;--gray-400:#9ca3af;--gray-500:#6b7280;
  --gray-600:#4b5563;--gray-700:#374151;--gray-800:#1f2937;
  --gray-900:#111827;--white:#ffffff;
  --radius:8px;--shadow:0 1px 3px rgba(0,0,0,.1),0 1px 2px rgba(0,0,0,.06);
  --shadow-md:0 4px 6px rgba(0,0,0,.07),0 2px 4px rgba(0,0,0,.06);
}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Noto Sans Lao',sans-serif;
  background:var(--gray-50);color:var(--gray-800);line-height:1.6;min-height:100vh}
a{color:var(--primary);text-decoration:none}

/* NAV */
.navbar{background:var(--primary);color:var(--white);padding:0 1rem;position:sticky;top:0;z-index:100;
  box-shadow:var(--shadow-md)}
.navbar .nav-inner{max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;height:56px}
.navbar .brand{font-size:1.2rem;font-weight:700;color:var(--white)}
.nav-links{display:flex;gap:.25rem}
.nav-links a{color:rgba(255,255,255,.85);padding:.5rem .75rem;border-radius:var(--radius);font-size:.9rem;transition:background .2s}
.nav-links a:hover,.nav-links a.active{background:rgba(255,255,255,.15);color:var(--white)}
.hamburger{display:none;background:none;border:none;color:var(--white);font-size:1.5rem;cursor:pointer}

/* LAYOUT */
.container{max-width:1200px;margin:0 auto;padding:1.5rem 1rem}
.page-header{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:1rem;margin-bottom:1.5rem}
.page-header h1{font-size:1.5rem;font-weight:700}

/* CARDS */
.card{background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.25rem;margin-bottom:1rem}
.card-header{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:.5rem;margin-bottom:1rem;padding-bottom:.75rem;border-bottom:1px solid var(--gray-200)}
.card-header h2{font-size:1.1rem;font-weight:600}

/* STAT CARDS */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;margin-bottom:1.5rem}
.stat-card{background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.25rem;display:flex;align-items:center;gap:1rem}
.stat-icon{width:48px;height:48px;border-radius:var(--radius);display:flex;align-items:center;justify-content:center;font-size:1.5rem;flex-shrink:0}
.stat-icon.blue{background:var(--primary-light);color:var(--primary)}
.stat-icon.green{background:var(--success-light);color:var(--success)}
.stat-icon.red{background:var(--danger-light);color:var(--danger)}
.stat-icon.yellow{background:var(--warning-light);color:var(--warning)}
.stat-info h3{font-size:1.5rem;font-weight:700;line-height:1.2}
.stat-info p{font-size:.85rem;color:var(--gray-500)}

/* TABLE */
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
table{width:100%;border-collapse:collapse;font-size:.9rem}
th,td{padding:.75rem .5rem;text-align:left;border-bottom:1px solid var(--gray-200);white-space:nowrap}
th{background:var(--gray-50);font-weight:600;color:var(--gray-600);position:sticky;top:0}
tr:hover td{background:var(--gray-50)}

/* BUTTONS */
.btn{display:inline-flex;align-items:center;gap:.375rem;padding:.5rem 1rem;border:none;border-radius:var(--radius);
  font-size:.875rem;font-weight:500;cursor:pointer;transition:background .2s,transform .1s;white-space:nowrap}
.btn:active{transform:scale(.97)}
.btn-primary{background:var(--primary);color:var(--white)}.btn-primary:hover{background:var(--primary-dark)}
.btn-success{background:var(--success);color:var(--white)}.btn-success:hover{background:#15803d}
.btn-danger{background:var(--danger);color:var(--white)}.btn-danger:hover{background:#b91c1c}
.btn-outline{background:var(--white);color:var(--gray-700);border:1px solid var(--gray-300)}.btn-outline:hover{background:var(--gray-50)}
.btn-sm{padding:.35rem .75rem;font-size:.8rem}
.btn-icon{width:32px;height:32px;padding:0;justify-content:center;border-radius:50%}
.btn-group{display:flex;gap:.375rem;flex-wrap:wrap}

/* FORMS */
.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem}
.form-group{display:flex;flex-direction:column;gap:.25rem}
.form-group label{font-size:.85rem;font-weight:500;color:var(--gray-600)}
.form-group input,.form-group select,.form-group textarea{padding:.5rem .75rem;border:1px solid var(--gray-300);
  border-radius:var(--radius);font-size:.9rem;transition:border-color .2s;background:var(--white)}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}
textarea{resize:vertical;min-height:60px}

/* MODAL */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.5);display:flex;align-items:center;justify-content:center;z-index:200;
  opacity:0;visibility:hidden;transition:opacity .2s,visibility .2s;padding:1rem}
.modal-overlay.active{opacity:1;visibility:visible}
.modal{background:var(--white);border-radius:var(--radius);box-shadow:0 20px 25px rgba(0,0,0,.15);width:100%;max-width:500px;
  max-height:90vh;overflow-y:auto;transform:translateY(-10px);transition:transform .2s}
.modal-overlay.active .modal{transform:translateY(0)}
.modal-header{display:flex;align-items:center;justify-content:space-between;padding:1rem 1.25rem;border-bottom:1px solid var(--gray-200)}
.modal-header h3{font-size:1.1rem;font-weight:600}
.modal-body{padding:1.25rem}
.modal-footer{display:flex;justify-content:flex-end;gap:.5rem;padding:1rem 1.25rem;border-top:1px solid var(--gray-200)}

/* BADGE */
.badge{display:inline-flex;padding:.2rem .5rem;border-radius:9999px;font-size:.75rem;font-weight:500}
.badge-success{background:var(--success-light);color:var(--success)}
.badge-danger{background:var(--danger-light);color:var(--danger)}

/* TOAST */
.toast-container{position:fixed;top:70px;right:1rem;z-index:300;display:flex;flex-direction:column;gap:.5rem}
.toast{padding:.75rem 1rem;border-radius:var(--radius);color:var(--white);font-size:.875rem;
  box-shadow:var(--shadow-md);animation:slideIn .3s ease,fadeOut .3s ease 2.7s forwards;max-width:350px}
.toast-success{background:var(--success)}.toast-error{background:var(--danger)}
@keyframes slideIn{from{transform:translateX(100%);opacity:0}to{transform:translateX(0);opacity:1}}
@keyframes fadeOut{to{opacity:0;transform:translateY(-10px)}}

/* EMPTY STATE */
.empty-state{text-align:center;padding:3rem 1rem;color:var(--gray-400)}
.empty-state .icon{font-size:3rem;margin-bottom:.5rem}
.empty-state p{font-size:.95rem}

/* LOADING */
.loading{text-align:center;padding:2rem;color:var(--gray-400)}
.spinner{display:inline-block;width:24px;height:24px;border:3px solid var(--gray-200);border-top-color:var(--primary);
  border-radius:50%;animation:spin .6s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* RESPONSIVE */
@media(max-width:768px){
  .hamburger{display:block}
  .nav-links{display:none;position:absolute;top:56px;left:0;right:0;background:var(--primary);
    flex-direction:column;padding:.5rem;box-shadow:var(--shadow-md)}
  .nav-links.open{display:flex}
  .nav-links a{padding:.75rem 1rem}
  .stats{grid-template-columns:1fr 1fr}
  .form-grid{grid-template-columns:1fr}
  .page-header{flex-direction:column;align-items:flex-start}
  .page-header h1{font-size:1.25rem}
  .btn-group{width:100%}
  .btn-group .btn{flex:1;justify-content:center}
  table{font-size:.8rem}
  th,td{padding:.5rem .35rem}
  .modal{margin:.5rem}
}
@media(max-width:480px){
  .stats{grid-template-columns:1fr}
  .stat-card{padding:1rem}
}