* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --primary: #1565C0;
  --primary-dark: #0D47A1;
  --primary-light: #E3F2FD;
  --teal: #00897B;
  --teal-light: #E0F2F1;
  --amber: #E65100;
  --amber-light: #FFF3E0;
  --green: #2E7D32;
  --green-light: #E8F5E9;
  --red: #C62828;
  --red-light: #FFEBEE;
  --dark: #1A1A2E;
  --text: #212121;
  --text-muted: #546E7A;
  --border: #E0E0E0;
  --bg: #F5F7FA;
  --white: #FFFFFF;
  --sidebar-width: 260px;
  --header-height: 64px;
}

body { font-family: 'Segoe UI', Arial, sans-serif; background: var(--bg); color: var(--text); font-size: 14px; }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; } ::-webkit-scrollbar-track { background: #f1f1f1; } ::-webkit-scrollbar-thumb { background: #ccc; border-radius: 3px; }

/* Layout */
.app-layout { display: flex; min-height: 100vh; }

/* Sidebar */
.sidebar { width: var(--sidebar-width); background: var(--dark); color: white; position: fixed; top: 0; left: 0; height: 100vh; overflow-y: auto; z-index: 1000; transition: transform 0.3s; }
.sidebar-logo { padding: 20px; border-bottom: 1px solid rgba(255,255,255,0.1); display: flex; align-items: center; gap: 12px; }
.sidebar-logo h1 { font-size: 22px; color: var(--teal); font-weight: 700; }
.sidebar-logo span { font-size: 11px; color: rgba(255,255,255,0.5); display: block; }
.sidebar-user { padding: 16px 20px; border-bottom: 1px solid rgba(255,255,255,0.1); }
.sidebar-user .name { font-weight: 600; font-size: 14px; }
.sidebar-user .role { font-size: 11px; color: rgba(255,255,255,0.5); text-transform: uppercase; letter-spacing: 1px; }
.sidebar-nav { padding: 12px 0; }
.nav-section { padding: 8px 20px 4px; font-size: 10px; color: rgba(255,255,255,0.3); text-transform: uppercase; letter-spacing: 1.5px; font-weight: 600; }
.nav-item { display: flex; align-items: center; gap: 12px; padding: 11px 20px; color: rgba(255,255,255,0.7); text-decoration: none; transition: all 0.2s; cursor: pointer; border: none; background: none; width: 100%; text-align: left; font-size: 14px; }
.nav-item:hover { background: rgba(255,255,255,0.08); color: white; }
.nav-item.active { background: var(--primary); color: white; }
.nav-item .icon { width: 20px; text-align: center; font-size: 16px; }
.nav-item .badge { margin-left: auto; background: var(--amber); color: white; font-size: 10px; padding: 2px 6px; border-radius: 10px; }

/* Main content */
.main-content { margin-left: var(--sidebar-width); flex: 1; min-height: 100vh; display: flex; flex-direction: column; }

/* Header */
.header { height: var(--header-height); background: var(--white); border-bottom: 1px solid var(--border); display: flex; align-items: center; padding: 0 24px; gap: 16px; position: sticky; top: 0; z-index: 100; }
.header-title { font-size: 18px; font-weight: 600; color: var(--text); flex: 1; }
.header-actions { display: flex; align-items: center; gap: 12px; }
.btn-icon { width: 36px; height: 36px; border: none; background: var(--bg); border-radius: 8px; cursor: pointer; display: flex; align-items: center; justify-content: center; font-size: 16px; color: var(--text-muted); transition: all 0.2s; }
.btn-icon:hover { background: var(--primary-light); color: var(--primary); }
.menu-toggle { display: none; }

/* Page content */
.page-content { padding: 24px; flex: 1; }

/* Cards */
.card { background: var(--white); border-radius: 12px; border: 1px solid var(--border); overflow: hidden; }
.card-header { padding: 16px 20px; border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; }
.card-title { font-size: 15px; font-weight: 600; color: var(--text); }
.card-body { padding: 20px; }

/* Stat cards */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card { background: var(--white); border-radius: 12px; padding: 20px; border: 1px solid var(--border); display: flex; align-items: center; gap: 16px; }
.stat-icon { width: 48px; height: 48px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 22px; flex-shrink: 0; }
.stat-icon.blue { background: var(--primary-light); }
.stat-icon.teal { background: var(--teal-light); }
.stat-icon.green { background: var(--green-light); }
.stat-icon.amber { background: var(--amber-light); }
.stat-value { font-size: 28px; font-weight: 700; color: var(--text); line-height: 1; }
.stat-label { font-size: 12px; color: var(--text-muted); margin-top: 4px; }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 9px 18px; border-radius: 8px; border: none; cursor: pointer; font-size: 13px; font-weight: 500; transition: all 0.2s; text-decoration: none; }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-teal { background: var(--teal); color: white; }
.btn-teal:hover { background: #00695C; }
.btn-success { background: var(--green); color: white; }
.btn-danger { background: var(--red); color: white; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-outline:hover { background: var(--bg); }
.btn-sm { padding: 6px 12px; font-size: 12px; }

/* Tables */
.table-container { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th { background: var(--bg); padding: 12px 16px; text-align: left; font-size: 12px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; border-bottom: 1px solid var(--border); white-space: nowrap; }
td { padding: 14px 16px; border-bottom: 1px solid var(--border); color: var(--text); vertical-align: middle; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--bg); }

/* Badges */
.badge { display: inline-flex; align-items: center; padding: 3px 10px; border-radius: 20px; font-size: 11px; font-weight: 600; }
.badge-success { background: var(--green-light); color: var(--green); }
.badge-danger { background: var(--red-light); color: var(--red); }
.badge-primary { background: var(--primary-light); color: var(--primary); }
.badge-amber { background: var(--amber-light); color: var(--amber); }
.badge-teal { background: var(--teal-light); color: var(--teal); }

/* Forms */
.form-group { margin-bottom: 16px; }
.form-label { display: block; font-size: 13px; font-weight: 500; color: var(--text); margin-bottom: 6px; }
.form-control { width: 100%; padding: 10px 14px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; color: var(--text); background: var(--white); transition: border-color 0.2s; outline: none; }
.form-control:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(21,101,192,0.1); }
.form-select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23546E7A' d='M6 8L1 3h10z'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 12px center; padding-right: 36px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }

/* Modal */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 2000; display: none; align-items: center; justify-content: center; padding: 20px; }
.modal-overlay.active { display: flex; }
.modal { background: var(--white); border-radius: 16px; width: 100%; max-width: 560px; max-height: 90vh; overflow-y: auto; }
.modal-header { padding: 20px 24px; border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; }
.modal-title { font-size: 16px; font-weight: 600; }
.modal-close { width: 32px; height: 32px; border: none; background: var(--bg); border-radius: 8px; cursor: pointer; font-size: 18px; display: flex; align-items: center; justify-content: center; color: var(--text-muted); }
.modal-body { padding: 24px; }
.modal-footer { padding: 16px 24px; border-top: 1px solid var(--border); display: flex; gap: 12px; justify-content: flex-end; }

/* Alerts */
.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; font-size: 13px; display: flex; align-items: center; gap: 10px; }
.alert-success { background: var(--green-light); color: var(--green); border: 1px solid #A5D6A7; }
.alert-danger { background: var(--red-light); color: var(--red); border: 1px solid #EF9A9A; }
.alert-info { background: var(--primary-light); color: var(--primary); border: 1px solid #90CAF9; }

/* Toggle switch */
.toggle { position: relative; display: inline-block; width: 44px; height: 24px; }
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle-slider { position: absolute; cursor: pointer; inset: 0; background: #ccc; border-radius: 24px; transition: 0.3s; }
.toggle-slider:before { position: absolute; content: ''; height: 18px; width: 18px; left: 3px; bottom: 3px; background: white; border-radius: 50%; transition: 0.3s; }
.toggle input:checked + .toggle-slider { background: var(--teal); }
.toggle input:checked + .toggle-slider:before { transform: translateX(20px); }

/* Page sections */
.page-section { display: none; }
.page-section.active { display: block; }

/* Login page */
.login-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, var(--dark) 0%, #16213E 50%, #0F3460 100%); }
.login-card { background: white; border-radius: 20px; padding: 48px 40px; width: 100%; max-width: 400px; box-shadow: 0 20px 60px rgba(0,0,0,0.3); }
.login-logo { text-align: center; margin-bottom: 32px; }
.login-logo h1 { font-size: 32px; color: var(--primary); font-weight: 800; }
.login-logo p { color: var(--text-muted); font-size: 13px; margin-top: 4px; }
.login-title { font-size: 20px; font-weight: 700; margin-bottom: 8px; }
.login-sub { color: var(--text-muted); font-size: 13px; margin-bottom: 28px; }

/* Responsive */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; }
  .menu-toggle { display: flex; }
  .form-grid { grid-template-columns: 1fr; }
  .form-grid-3 { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .page-content { padding: 16px; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .login-card { padding: 32px 24px; }
}

/* Utility */
.text-muted { color: var(--text-muted); }
.text-center { text-align: center; }
.mt-4 { margin-top: 16px; }
.mb-4 { margin-bottom: 16px; }
.gap-2 { gap: 8px; }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.spinner { width: 20px; height: 20px; border: 2px solid #f3f3f3; border-top: 2px solid var(--primary); border-radius: 50%; animation: spin 0.8s linear infinite; display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }
.hidden { display: none; }
.w-full { width: 100%; }