:root{--primary: #0d6efd;--primary-dark: #0b5ed7;--secondary: #fd7e14;--danger: #ef4444;--warning: #f59e0b;--bg-dark: #0a0a0f;--bg-card: #16161d;--bg-hover: #1e1e28;--bg-input: #0f0f14;--text-primary: #ffffff;--text-secondary: #d4d4d8;--border: #2a2a35;--highlight: #4ade80;--radius: 10px;--shadow: 0 8px 32px rgba(0, 0, 0, .4);--btn-text: var(--text-primary)}[data-theme=dark]{--bg-dark: #0a0a0f;--bg-card: #16161d;--bg-hover: #1e1e28;--bg-input: #0f0f14;--text-primary: #ffffff;--text-secondary: #a1a1aa;--border: #2a2a35;--status-success: #10b981;--status-warning: #f59e0b;--status-danger: #ef4444;--status-info: #3b82f6}[data-theme=light]{--primary: #0d6efd;--primary-dark: #0b5ed7;--secondary: #fd7e14;--danger: #ef4444;--warning: #f59e0b;--bg-dark: #f3f4f6;--bg-card: #ffffff;--bg-hover: #e5e7eb;--bg-input: #ffffff;--text-primary: #111827;--text-secondary: #6b7280;--border: #e5e7eb;--status-success: #059669;--status-warning: #d97706;--status-danger: #dc2626;--status-info: #2563eb;--highlight: #16a34a;--shadow: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);--btn-text: #111827}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,system-ui,sans-serif;background:var(--bg-dark);color:var(--text-primary);line-height:1.6;min-height:100vh}p,span,div,strong,label{color:inherit}h1,h2,h3,h4,h5,h6{color:var(--text-primary)}a{color:var(--highlight);text-decoration:none}a:hover{text-decoration:underline}.app-layout{display:flex;min-height:100vh}.sidebar{width:240px;background:var(--bg-card);border-right:1px solid var(--border);padding:1.5rem .5rem;position:fixed;height:100vh;display:flex;flex-direction:column;overflow-y:auto;scrollbar-width:thin;scrollbar-color:var(--border) transparent}.sidebar::-webkit-scrollbar{width:6px}.sidebar::-webkit-scrollbar-track{background:transparent}.sidebar::-webkit-scrollbar-thumb{background-color:var(--border);border-radius:20px}.sidebar::-webkit-scrollbar-thumb:hover{background-color:var(--text-secondary)}.sidebar-header{display:flex;align-items:center;gap:.75rem;padding-bottom:1.5rem;border-bottom:1px solid var(--border);margin-bottom:1rem}.logo{width:42px;height:42px;background:linear-gradient(135deg,var(--primary),#8b5cf6);border-radius:10px;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1.1rem}.school-name{font-size:.95rem;font-weight:600;line-height:1.3}.nav-menu{list-style:none;flex:1;overflow-y:auto;min-height:0;padding:0 0 0 10px}.nav-item{margin-bottom:.25rem}.nav-link{display:flex;align-items:center;gap:.75rem;padding:.75rem 1rem;border-radius:var(--radius);color:var(--text-secondary);background:transparent;text-decoration:none;transition:all .2s;font-size:.9rem}.nav-link .material-symbols-outlined{font-size:1.25rem;color:var(--text-secondary);transition:color .2s}.nav-link:hover .material-symbols-outlined,.nav-link.active .material-symbols-outlined{color:inherit}.nav-link:hover{background:var(--bg-hover);color:var(--text-primary);text-decoration:none}.nav-link.active{background:#22c55e1a;color:var(--highlight);font-weight:500}.nav-link.active .material-symbols-outlined{color:var(--highlight)}.main-content{flex:1;margin-left:240px;padding:1.5rem 2rem}.top-bar{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem;padding-bottom:1rem;border-bottom:1px solid var(--border)}.page-title{font-size:1.5rem;font-weight:600}.online-status{display:flex;align-items:center;gap:.5rem;font-size:.85rem;padding:.5rem 1rem;border-radius:20px;background:var(--bg-card)}.online-status.online{color:var(--highlight)}.online-status.offline{color:var(--danger)}.status-dot{width:8px;height:8px;border-radius:50%;background:currentColor}.card{background:var(--bg-card);border-radius:var(--radius);border:1px solid var(--border);padding:1.5rem;margin-bottom:1.5rem}.card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem;padding-bottom:1rem;border-bottom:1px solid var(--border)}.card-title{font-size:1.15rem;font-weight:700;color:var(--text-primary)}.stats-row{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem;margin-bottom:1.5rem}.stat-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem}.stat-card h3{font-size:1.75rem;font-weight:700;margin-bottom:.25rem}.stat-card p{font-size:.85rem;color:var(--text-secondary)}.stat-card.primary h3{color:var(--primary)}.stat-card.success h3{color:var(--secondary)}.stat-card.warning h3{color:var(--warning)}.stat-card.danger h3{color:var(--danger)}table{width:100%;border-collapse:collapse}th,td{padding:.875rem 1rem;text-align:left;border-bottom:1px solid var(--border);color:var(--text-primary)}th{font-weight:700;color:var(--text-primary);font-size:.8rem;text-transform:uppercase;letter-spacing:.05em;background:#ffffff05}tr:hover{background:var(--bg-hover)}td a{color:var(--highlight);font-weight:600}td a:hover{text-decoration:underline;opacity:.9}.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.625rem 1.25rem;border-radius:8px;font-size:.9rem;font-weight:500;cursor:pointer;border:none;transition:all .2s;text-decoration:none;box-shadow:0 1px 2px #0000000d}.btn:hover{transform:translateY(-1px);box-shadow:0 4px 6px #00000014}.btn:active{transform:translateY(0);box-shadow:0 1px 2px #0000000d}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark)}.btn-secondary{background:var(--bg-hover);color:var(--text-primary);border:1px solid var(--border);box-shadow:none}.btn-secondary:hover{background:var(--border);box-shadow:none;transform:none}.btn-success{background:var(--highlight);color:#fff}.btn-success:hover{background:#15803d}.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover{background:#dc2626}.btn-lg{padding:.875rem 2rem;font-size:1rem}.btn-sm{padding:.375rem .75rem;font-size:.8rem}.form-group{margin-bottom:1rem}.form-label{display:block;margin-bottom:.5rem;font-size:.875rem;font-weight:500;color:var(--text-secondary)}.form-control{width:100%;padding:.625rem 1rem;background:var(--bg-input);background-color:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius);color:var(--text-primary);font-size:.95rem;transition:border-color .2s,box-shadow .2s}.form-control:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #3b82f633}select.form-control option,select.form-control optgroup{background:var(--bg-card);color:var(--text-primary)}.form-control::placeholder{color:var(--text-secondary)}.billing-container{display:grid;grid-template-columns:2fr 1fr;gap:1.5rem}.items-table{margin-top:1rem}.items-table th{background:var(--bg-hover)}.item-row{display:grid;grid-template-columns:3fr 1fr 1fr 1fr 40px;gap:.5rem;align-items:center;padding:.5rem 0}.add-item-btn{display:flex;align-items:center;justify-content:center;gap:.5rem;padding:1rem;border:2px dashed var(--border);border-radius:var(--radius);color:var(--text-secondary);cursor:pointer;transition:all .2s;margin-top:1rem}.add-item-btn:hover{border-color:var(--primary);color:var(--primary)}.totals-section{background:var(--bg-hover);border-radius:var(--radius);padding:1.25rem}.total-row{display:flex;justify-content:space-between;padding:.5rem 0}.total-row.grand{font-size:1.25rem;font-weight:700;border-top:1px solid var(--border);margin-top:.5rem;padding-top:1rem}.badge{display:inline-block;padding:.25rem .625rem;border-radius:9999px;font-size:.75rem;font-weight:600;text-transform:capitalize}.badge-success{background:#10b9811a;color:var(--status-success);border:1px solid rgba(16,185,129,.2)}.badge-warning{background:#f59e0b1a;color:var(--status-warning);border:1px solid rgba(245,158,11,.2)}.badge-danger{background:#ef44441a;color:var(--status-danger);border:1px solid rgba(239,68,68,.2)}.badge-info{background:#3b82f61a;color:var(--status-info);border:1px solid rgba(59,130,246,.2)}.modal-overlay{position:fixed;inset:0;background:#0003;display:flex;align-items:center;justify-content:center;z-index:1000}.custom-modal,.modal{background:var(--bg-card);background-color:var(--bg-card);color:var(--text-primary);border-radius:var(--radius);width:100%;max-width:600px;max-height:90vh;overflow-y:auto;border:1px solid var(--border);box-shadow:var(--shadow)}.modal-header{display:flex;justify-content:space-between;align-items:center;padding:1.25rem 1.5rem;border-bottom:1px solid var(--border);background:#ffffff0d}.modal-title{font-size:1.25rem;font-weight:700;color:var(--text-primary)}.modal-close{background:none;border:none;color:var(--text-secondary);cursor:pointer;font-size:1.5rem}.modal-body{padding:1.5rem}.modal-footer{display:flex;justify-content:flex-end;gap:.75rem;padding:1rem 1.5rem;border-top:1px solid var(--border)}.toast-container{position:fixed;top:1rem;right:1rem;z-index:9999}.toast{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:1rem 1.5rem;margin-bottom:.5rem;min-width:300px;box-shadow:var(--shadow);animation:slideIn .3s ease}.toast.success{border-left:4px solid var(--secondary)}.toast.error{border-left:4px solid var(--danger)}@keyframes slideIn{0%{transform:translate(100%);opacity:0}to{transform:translate(0);opacity:1}}.autocomplete-container{position:relative}.autocomplete-dropdown{position:absolute;top:100%;left:0;right:0;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);max-height:250px;overflow-y:auto;z-index:100;box-shadow:var(--shadow)}.autocomplete-item{padding:.75rem 1rem;cursor:pointer;border-bottom:1px solid var(--border)}.autocomplete-item:hover{background:var(--bg-hover)}.autocomplete-item:last-child{border-bottom:none}kbd{display:inline-block;padding:.125rem .5rem;font-size:.75rem;font-family:monospace;background:var(--bg-hover);border:1px solid var(--border);border-radius:4px;color:var(--text-secondary)}.flex{display:flex}.items-center{align-items:center}.justify-between{justify-content:space-between}.gap-2{gap:.5rem}.gap-3{gap:.75rem}.gap-4{gap:1rem}.mt-2{margin-top:.5rem}.mt-4{margin-top:1rem}.mb-2{margin-bottom:.5rem}.mb-4{margin-bottom:1rem}.text-right{text-align:right}.text-center{text-align:center}.text-muted{color:var(--text-secondary)!important}.text-highlight{color:var(--highlight);font-weight:500}@media (max-width: 1024px){.billing-container{grid-template-columns:1fr}.stats-row{grid-template-columns:repeat(2,1fr)}}@media (max-width: 768px){.sidebar{width:100%;height:auto;position:relative}.main-content{margin-left:0}.stats-row{grid-template-columns:1fr}}.shimmer{background:var(--bg-hover);background-image:linear-gradient(to right,var(--bg-hover) 0%,rgba(255,255,255,.08) 20%,var(--bg-hover) 40%,var(--bg-hover) 100%);background-repeat:no-repeat;background-size:800px 100%;animation:shimmer 1.5s infinite linear forwards}@keyframes shimmer{0%{background-position:-400px 0}to{background-position:400px 0}}.shimmer-text{height:1.5rem;border-radius:4px;width:60%;margin-bottom:.25rem}.shimmer-badge{height:1.5rem;width:80px;border-radius:12px}