:root{
  --sb-w:240px;--sb-bg:#0D2B55;--sb-hover:#1a3c6e;--sb-active:#f39c12;
  --tb-h:54px;--accent:#1a5276;--accent2:#f39c12;
  --danger:#c0392b;--success:#27ae60;--warning:#e67e22;--info:#2980b9;
  --radius:10px;--shadow:0 2px 12px rgba(0,0,0,.07);
}
*{box-sizing:border-box;margin:0;padding:0;}
body{font-family:'Segoe UI',Arial,sans-serif;font-size:14px;background:#f0f2f5;color:#333;display:flex;min-height:100vh;}

/* ── SIDEBAR ── */
.sidebar{width:var(--sb-w);min-height:100vh;background:var(--sb-bg);position:fixed;left:0;top:0;display:flex;flex-direction:column;z-index:1000;overflow-y:auto;transition:transform .25s;}
.sb-brand{padding:16px 18px;color:#fff;font-size:17px;font-weight:700;border-bottom:1px solid rgba(255,255,255,.1);display:flex;align-items:center;gap:8px;white-space:nowrap;overflow:hidden;}
.sb-brand i{color:var(--accent2);font-size:20px;flex-shrink:0;}
.sb-nav{flex:1;padding:8px 0;}
.nav-section{color:rgba(255,255,255,.35);font-size:10px;font-weight:700;letter-spacing:1.5px;text-transform:uppercase;padding:12px 18px 3px;}
.nav-link{display:flex;align-items:center;gap:10px;padding:9px 18px;color:rgba(255,255,255,.72);text-decoration:none;transition:all .15s;border-left:3px solid transparent;font-size:13.5px;}
.nav-link:hover{background:var(--sb-hover);color:#fff;text-decoration:none;}
.nav-link.active{background:var(--sb-hover);color:#fff;border-left-color:var(--accent2);}
.nav-link i{width:18px;text-align:center;font-size:14px;flex-shrink:0;}
.sb-user{display:flex;align-items:center;gap:8px;padding:12px 14px;border-top:1px solid rgba(255,255,255,.1);color:rgba(255,255,255,.8);}
.sb-avatar{width:32px;height:32px;border-radius:50%;background:var(--accent2);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px;flex-shrink:0;}
.sb-uinfo{flex:1;min-width:0;}
.sb-uname{font-size:12.5px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.sb-urole{font-size:11px;opacity:.55;}
.sb-user a{color:rgba(255,255,255,.45);font-size:15px;text-decoration:none;}
.sb-user a:hover{color:var(--accent2);}

/* ── MAIN ── */
.main-wrap{margin-left:var(--sb-w);flex:1;display:flex;flex-direction:column;min-height:100vh;transition:margin-left .25s;}
.topbar{height:var(--tb-h);background:#fff;border-bottom:1px solid #e2e5e9;display:flex;align-items:center;padding:0 18px;gap:12px;position:sticky;top:0;z-index:100;box-shadow:0 1px 4px rgba(0,0,0,.05);}
.sb-toggle{background:none;border:none;cursor:pointer;font-size:18px;color:#666;padding:5px 8px;border-radius:6px;}
.sb-toggle:hover{background:#f0f2f5;}
.tb-title{font-size:15px;font-weight:600;flex:1;color:#1a1a2e;}
.tb-right{display:flex;align-items:center;gap:12px;}
.notif-bell{position:relative;color:#555;font-size:18px;text-decoration:none;padding:4px;}
.notif-bell:hover{color:var(--danger);}
.notif-badge{position:absolute;top:-4px;right:-6px;background:var(--danger);color:#fff;font-size:10px;font-weight:700;border-radius:10px;padding:1px 5px;min-width:18px;text-align:center;}
.tb-date{font-size:12px;color:#888;}
.tb-time{font-size:12px;color:#888;font-variant-numeric:tabular-nums;min-width:58px;}
.page-content{padding:20px;flex:1;}

/* ── CARDS ── */
.card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);border:none;margin-bottom:18px;}
.card-header{padding:14px 18px;border-bottom:1px solid #f0f0f0;font-weight:600;font-size:14px;display:flex;align-items:center;justify-content:space-between;background:transparent;border-radius:var(--radius) var(--radius) 0 0;}
.card-header .card-title{display:flex;align-items:center;gap:8px;margin:0;}
.card-body{padding:18px;}
.card-footer{padding:10px 18px;border-top:1px solid #f0f0f0;background:transparent;}

/* ── STAT CARDS ── */
.stat-card{border-radius:var(--radius);padding:18px;display:flex;align-items:center;gap:14px;color:#fff;box-shadow:var(--shadow);}
.stat-card.blue{background:linear-gradient(135deg,#1a5276,#0D2B55);}
.stat-card.green{background:linear-gradient(135deg,#27ae60,#1e8449);}
.stat-card.amber{background:linear-gradient(135deg,#f39c12,#d68910);}
.stat-card.red{background:linear-gradient(135deg,#c0392b,#922b21);}
.stat-card.teal{background:linear-gradient(135deg,#16a085,#0e6655);}
.stat-card.purple{background:linear-gradient(135deg,#8e44ad,#6c3483);}
.sc-icon{font-size:34px;opacity:.85;}
.sc-val{font-size:24px;font-weight:700;line-height:1;}
.sc-lbl{font-size:12px;opacity:.8;margin-top:3px;}

/* ── TABLES ── */
.table th{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.4px;color:#666;background:#f8f9fa;border-bottom:1px solid #e9ecef;}
.table td,.table th{padding:10px 13px;vertical-align:middle;}
.table-hover tbody tr:hover{background:#f8fbff;cursor:default;}
.table-responsive{border-radius:0 0 var(--radius) var(--radius);overflow:hidden;}

/* ── BADGES ── */
.badge{padding:4px 9px;border-radius:20px;font-size:11px;font-weight:600;}
.bg-success-soft{background:#d5f5e3;color:#1e8449;}
.bg-danger-soft{background:#fdecea;color:#c0392b;}
.bg-warning-soft{background:#fef9e7;color:#b7770d;}
.bg-info-soft{background:#eaf4fb;color:#1a5276;}
.bg-secondary-soft{background:#f0f0f0;color:#666;}

/* ── FORMS ── */
.form-control,.form-select{border-radius:7px;border-color:#d0d5dd;font-size:14px;}
.form-control:focus,.form-select:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(26,82,118,.15);}
.form-label{font-weight:600;font-size:13px;color:#444;margin-bottom:4px;}
.input-group-text{background:#f8f9fa;border-color:#d0d5dd;font-size:14px;}

/* ── BUTTONS ── */
.btn-primary{background:var(--accent);border-color:var(--accent);}
.btn-primary:hover{background:#154360;border-color:#154360;}
.btn-sm{font-size:12px;padding:5px 10px;}
.btn-icon{width:30px;height:30px;display:inline-flex;align-items:center;justify-content:center;padding:0;border-radius:6px;}

/* ── PAGE HEADER ── */
.page-hdr{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;flex-wrap:wrap;gap:8px;}
.page-hdr h4{font-weight:700;color:#0D2B55;margin:0;font-size:18px;}

/* ── ALERTS ── */
.alert{border-radius:8px;border:none;font-size:13.5px;}

/* ── POS ── */
.pos-wrap{display:grid;grid-template-columns:1fr 360px;gap:16px;height:calc(100vh - var(--tb-h) - 40px);overflow:hidden;}
.pos-left{display:flex;flex-direction:column;gap:12px;overflow:hidden;}
.pos-search-box{position:relative;}
.pos-search-box input{width:100%;padding:10px 14px 10px 40px;border:2px solid #ddd;border-radius:8px;font-size:15px;}
.pos-search-box input:focus{border-color:var(--accent);outline:none;}
.pos-search-box .si{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:#aaa;font-size:15px;}
.pos-filters{display:flex;gap:6px;flex-wrap:wrap;}
.pos-filter-btn{padding:5px 12px;border:1px solid #ddd;border-radius:20px;background:#fff;font-size:12px;cursor:pointer;transition:all .15s;}
.pos-filter-btn.active,.pos-filter-btn:hover{background:var(--accent);color:#fff;border-color:var(--accent);}
.med-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px;overflow-y:auto;padding:2px;}
.med-card{background:#fff;border:2px solid #eee;border-radius:10px;padding:12px 10px;cursor:pointer;text-align:center;transition:all .15s;box-shadow:0 1px 4px rgba(0,0,0,.04);}
.med-card:hover{border-color:var(--accent);transform:translateY(-2px);box-shadow:0 4px 12px rgba(26,82,118,.15);}
.med-card.out{opacity:.45;pointer-events:none;border-color:#ddd;}
.med-card.low-stock{border-color:#f39c12;}
.mc-name{font-weight:600;font-size:12.5px;color:#333;margin-bottom:3px;line-height:1.3;}
.mc-generic{font-size:10px;color:#aaa;margin-bottom:4px;}
.mc-price{color:var(--accent);font-weight:700;font-size:14px;}
.mc-stock{font-size:11px;margin-top:3px;}
.mc-rx{color:#8e44ad;font-size:10px;margin-top:2px;}

/* ── CART ── */
.cart-panel{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);display:flex;flex-direction:column;overflow:hidden;}
.cart-hdr{padding:14px 16px;border-bottom:1px solid #eee;font-weight:700;font-size:14px;display:flex;align-items:center;justify-content:space-between;}
.cart-body{flex:1;overflow-y:auto;padding:8px;}
.cart-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;color:#ccc;padding:20px;text-align:center;}
.cart-empty i{font-size:44px;margin-bottom:10px;}
.cart-item{display:flex;align-items:center;gap:6px;padding:7px 4px;border-bottom:1px solid #f5f5f5;}
.ci-info{flex:1;min-width:0;}
.ci-name{font-size:12.5px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.ci-price{font-size:11px;color:#888;}
.ci-qty{display:flex;align-items:center;gap:4px;}
.ci-qty button{width:22px;height:22px;border:1px solid #ddd;background:#f8f9fa;border-radius:4px;cursor:pointer;font-size:13px;display:flex;align-items:center;justify-content:center;}
.ci-qty span{min-width:22px;text-align:center;font-size:13px;font-weight:600;}
.ci-total{font-size:12.5px;font-weight:700;min-width:70px;text-align:right;}
.ci-del{background:none;border:none;color:#ccc;cursor:pointer;font-size:13px;padding:2px 4px;}
.ci-del:hover{color:var(--danger);}
.cart-footer{padding:14px;border-top:1px solid #eee;}
.cart-totals{margin-bottom:10px;}
.ct-row{display:flex;justify-content:space-between;font-size:13px;margin-bottom:4px;color:#666;}
.ct-row.grand{font-size:17px;font-weight:700;color:#333;padding-top:6px;border-top:2px solid #eee;margin-top:6px;}
.btn-checkout{width:100%;padding:13px;background:var(--success);color:#fff;font-size:15px;font-weight:700;border:none;border-radius:8px;cursor:pointer;transition:background .2s;}
.btn-checkout:hover:not(:disabled){background:#1e8449;}
.btn-checkout:disabled{background:#aaa;cursor:not-allowed;}
.btn-clear{width:100%;padding:7px;background:transparent;border:1px solid #ddd;border-radius:6px;font-size:13px;cursor:pointer;margin-top:6px;color:#666;}
.btn-clear:hover{background:#f8f9fa;}

/* ── RECEIPT ── */
.receipt{max-width:480px;margin:auto;font-family:Arial,sans-serif;font-size:13px;}
.receipt-header{text-align:center;border-bottom:2px dashed #ccc;padding-bottom:12px;margin-bottom:12px;}
.receipt-header h3{margin:0;color:#0D2B55;font-size:16px;}
.receipt-header p{margin:2px 0;font-size:12px;color:#666;}
.receipt-stamp{text-align:right;margin-top:12px;}
.receipt-stamp img{max-height:70px;opacity:.85;}
.receipt-sig{text-align:right;margin-top:6px;}
.receipt-sig img{max-height:50px;opacity:.85;}
.receipt-footer{text-align:center;border-top:2px dashed #ccc;margin-top:12px;padding-top:8px;font-size:11px;color:#888;}

/* ── MODAL ── */
.modal-header{background:var(--sb-bg);color:#fff;border-radius:var(--radius) var(--radius) 0 0;}
.modal-header .btn-close{filter:invert(1);}
.modal-title{font-weight:700;}

/* ── MISC ── */
.stock-ok{color:var(--success);font-weight:600;}
.stock-low{color:var(--warning);font-weight:600;}
.stock-out{color:var(--danger);font-weight:600;}
.text-right{text-align:right;}

/* ── LOGIN ── */
.login-page{min-height:100vh;background:linear-gradient(135deg,#0D2B55 0%,#1a5276 60%,#f39c12 100%);display:flex;align-items:center;justify-content:center;}
.login-box{background:#fff;border-radius:14px;padding:36px 32px;width:100%;max-width:390px;box-shadow:0 20px 60px rgba(0,0,0,.25);}
.login-logo{text-align:center;margin-bottom:24px;}
.login-logo i{font-size:44px;color:#f39c12;}
.login-logo h2{margin:8px 0 2px;font-weight:800;color:#0D2B55;font-size:22px;}
.login-logo p{color:#888;font-size:13px;}
.btn-login{width:100%;padding:12px;background:#0D2B55;color:#fff;border:none;border-radius:8px;font-size:15px;font-weight:700;cursor:pointer;transition:background .2s;margin-top:4px;}
.btn-login:hover{background:#1a5276;}

/* ── ANALYTICS CHARTS ── */
.chart-card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:18px;margin-bottom:18px;}
.chart-title{font-weight:700;font-size:14px;color:#0D2B55;margin-bottom:12px;display:flex;align-items:center;gap:8px;}

/* ── RESPONSIVE ── */
@media(max-width:768px){
  .sidebar{transform:translateX(-100%);}
  .sidebar.sb-open{transform:translateX(0);}
  .main-wrap{margin-left:0;}
  .pos-wrap{grid-template-columns:1fr;grid-template-rows:auto 400px;}
  .med-grid{grid-template-columns:repeat(auto-fill,minmax(130px,1fr));}
}

/* ── PRINT ── */
@media print{
  .sidebar,.topbar,.no-print{display:none!important;}
  .main-wrap{margin-left:0;}
  .page-content{padding:0;}
}

/* ── POWERED BY ── */
.sb-powered{padding:8px 16px;font-size:10px;color:rgba(255,255,255,.3);text-align:center;border-top:1px solid rgba(255,255,255,.07);}
.sb-powered a{color:rgba(255,255,255,.5);text-decoration:none;}
.sb-powered a:hover{color:var(--accent2);}

/* ── THERMAL RECEIPT ── */
@media print{
  .thermal-receipt{font-family:'Courier New',monospace;font-size:10px;width:100%;max-width:300px;margin:auto;}
  .thermal-receipt .th-center{text-align:center;}
  .thermal-receipt .th-line{border-top:1px dashed #000;margin:4px 0;}
  .thermal-receipt .th-row{display:flex;justify-content:space-between;}
  .thermal-receipt .th-bold{font-weight:700;}
  .thermal-receipt .th-big{font-size:13px;font-weight:700;}
}
.thermal-receipt{font-family:'Courier New',monospace;font-size:11px;width:100%;max-width:300px;margin:auto;padding:8px;}
.thermal-receipt .th-center{text-align:center;}
.thermal-receipt .th-line{border-top:1px dashed #999;margin:6px 0;}
.thermal-receipt .th-row{display:flex;justify-content:space-between;font-size:11px;}
.thermal-receipt .th-bold{font-weight:700;}
.thermal-receipt .th-big{font-size:14px;font-weight:700;}

/* ── BULK UPLOAD ── */
.upload-zone{border:2px dashed #ccc;border-radius:10px;padding:28px;text-align:center;background:#f8f9fa;cursor:pointer;transition:all .2s;}
.upload-zone:hover,.upload-zone.drag{border-color:var(--accent);background:#e8eff7;}
.upload-zone i{font-size:36px;color:#ccc;margin-bottom:10px;}

/* ── TABLE ACTIONS ── */
.tbl-actions{white-space:nowrap;}

/* ── STEPS ── */
.step-pill{display:inline-flex;align-items:center;gap:6px;background:#e8eff7;color:#1a5276;border-radius:20px;padding:4px 12px;font-size:12px;font-weight:600;}

/* ── MOBILE OPTIMISATION ── */
@media (max-width: 768px) {
  /* Sidebar overlay */
  .sidebar { transform: translateX(-100%); width: 260px !important; }
  .sidebar.sb-open { transform: translateX(0); box-shadow: 4px 0 20px rgba(0,0,0,.3); }
  .main-wrap { margin-left: 0 !important; }

  /* Topbar */
  .tb-date { display: none; }
  .tb-title { font-size: 14px; }

  /* Page content padding */
  .page-content { padding: 10px !important; }

  /* Page header wraps on small screens */
  .page-hdr { flex-direction: column; align-items: flex-start; gap: 8px; }
  .page-hdr .d-flex { width: 100%; flex-wrap: wrap; }

  /* Cards full width */
  .row > [class*="col-md-"] { margin-bottom: 0; }

  /* Tables — horizontal scroll */
  .table-responsive { -webkit-overflow-scrolling: touch; }

  /* POS layout — stack vertically on mobile */
  .pos-layout { flex-direction: column; height: auto !important; overflow: visible; }
  .pos-right { width: 100% !important; margin-top: 10px; }
  .med-grid { grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)) !important; max-height: 50vh; }

  /* Medicine cards smaller on mobile */
  .med-card { height: 76px !important; padding: 6px 7px !important; }
  .mc-name { font-size: 10.5px !important; }
  .mc-price { font-size: 11px !important; }
  .mc-stock { font-size: 9px !important; }

  /* Stat cards */
  .stat-card { padding: 12px !important; }
  .sc-val { font-size: 18px !important; }
  .sc-icon { width: 38px; height: 38px; font-size: 16px !important; }

  /* Filter bars wrap */
  .stab-nav { gap: 2px; }
  .stab-link { padding: 7px 10px; font-size: 11px; }

  /* Dashboard filter bar */
  .d-flex.gap-2.align-items-center.mb-3 { flex-direction: column; align-items: stretch !important; }
  .d-flex.gap-2.align-items-center.mb-3 form { flex-wrap: wrap; }

  /* Cart items */
  .ci-total { min-width: 55px !important; font-size: 11px !important; }
  .ci-name { font-size: 11px !important; }

  /* Purchase order table on mobile */
  #poRows .form-select, #poRows .form-control { font-size: 11px; padding: 3px 5px; }

  /* Invoice page action bar */
  .no-print[style*="sticky"] { flex-wrap: wrap; gap: 6px; }
}

@media (max-width: 480px) {
  .login-box { margin: 10px; padding: 24px 18px; }
  .med-grid { grid-template-columns: repeat(auto-fill, minmax(95px, 1fr)) !important; }
  .med-card { height: 70px !important; }
  .mc-name { font-size: 10px !important; }
  .pos-right { font-size: 12px; }
  .cart-hdr { padding: 8px 10px; }
  .cart-foot { padding: 8px; }
  .btn-checkout { font-size: 13px; padding: 9px; }
}

/* Sidebar overlay backdrop on mobile */
.sb-backdrop {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,.4);
  z-index: 999;
}
.sb-backdrop.show { display: block; }