:root{
  --sidebar-bg:#111827;
  --sidebar-bg-seller:#7c2d12;
  --accent-blue:#2563eb;
  --accent-green:#16a34a;
  --accent-orange:#ea580c;
  --accent-purple:#7c3aed;
  --accent-red:#dc2626;
  --bg-page:#f3f4f6;
  --border:#e5e7eb;
  --text-main:#111827;
  --text-muted:#6b7280;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg-page);
  color:var(--text-main);
  display:flex;
  min-height:100vh;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none;}
img{max-width:100%;}

/* ---------- Sidebar ---------- */
.sidebar{
  width:270px;
  min-width:270px;
  background:var(--sidebar-bg);
  color:#fff;
  display:flex;
  flex-direction:column;
  padding:20px 0;
  height:100vh;
  position:sticky;
  top:0;
  z-index:200;
  transition:transform .25s ease;
}
.sidebar.seller-theme{background:var(--sidebar-bg-seller);}
.sidebar-brand{
  padding:0 20px 16px;
  border-bottom:1px solid rgba(255,255,255,.08);
  margin-bottom:14px;
}
.sidebar-brand h1{
  font-size:16px;
  font-weight:800;
  letter-spacing:.3px;
  margin:0 0 8px;
  text-transform:uppercase;
}
.branch-pill{
  display:inline-flex;
  align-items:center;
  gap:6px;
  background:rgba(255,255,255,.1);
  padding:4px 10px;
  border-radius:20px;
  font-size:11px;
  font-weight:700;
  letter-spacing:.4px;
}
.sidebar-section-label{
  font-size:11px;
  color:#9ca3af;
  text-transform:uppercase;
  letter-spacing:.6px;
  font-weight:700;
  padding:14px 20px 6px;
}
.sidebar-nav{flex:1; overflow-y:auto;}
.sidebar-link{
  display:flex;
  align-items:center;
  gap:10px;
  padding:11px 20px;
  font-size:14.5px;
  font-weight:600;
  color:#d1d5db;
  border-left:3px solid transparent;
}
.sidebar-link:hover{background:rgba(255,255,255,.06); color:#fff;}
.sidebar-link.active{
  background:var(--accent-blue);
  color:#fff;
  border-left-color:#fff;
}
.seller-theme .sidebar-link.active{background:var(--accent-orange);}
.sidebar-link .icon{width:18px; text-align:center;}
.sidebar-footer{padding:16px 20px 0;}
.btn-logout{
  display:flex; align-items:center; justify-content:center; gap:8px;
  width:100%;
  background:rgba(220,38,38,.15);
  color:#fca5a5;
  border:1px solid rgba(220,38,38,.3);
  padding:10px;
  border-radius:8px;
  font-weight:700;
  font-size:14px;
  cursor:pointer;
}
.btn-logout:hover{background:rgba(220,38,38,.28);}

.sidebar-overlay{
  display:none;
  position:fixed; inset:0; background:rgba(0,0,0,.5); z-index:150;
}

.menu-toggle{
  display:none;
  background:none; border:none; cursor:pointer;
  width:38px; height:38px; border-radius:8px;
  align-items:center; justify-content:center;
  flex-direction:column; gap:4px;
}
.menu-toggle span{display:block; width:20px; height:2px; background:#374151; border-radius:2px;}
.menu-toggle:hover{background:#f3f4f6;}

/* ---------- Main area ---------- */
.main{flex:1; display:flex; flex-direction:column; min-width:0;}
.topbar{
  background:#fff;
  border-bottom:1px solid var(--border);
  padding:14px 28px;
  display:flex; justify-content:space-between; align-items:center;
  gap:12px;
  position:sticky; top:0; z-index:100;
}
.topbar .title-wrap{display:flex; align-items:center; gap:12px; min-width:0;}
.topbar .title{font-weight:700; color:#374151; letter-spacing:.3px; font-size:14px; text-transform:uppercase; white-space:nowrap; overflow:hidden; text-overflow:ellipsis;}
.topbar .user-block{display:flex; align-items:center; gap:10px; flex-shrink:0;}
.topbar .user-name{font-weight:700; font-size:14px;}
.topbar .user-role{display:block; font-size:11px; color:var(--accent-blue); font-weight:700;}
.avatar{
  width:34px;height:34px;border-radius:50%;
  background:var(--accent-blue); color:#fff;
  display:flex; align-items:center; justify-content:center;
  font-weight:700;
  flex-shrink:0;
}
.content{padding:28px; flex:1; min-width:0; max-width:100%;}

h2.page-title{font-size:26px; font-weight:800; margin:0 0 4px;}
p.page-sub{color:var(--text-muted); margin:0 0 20px; font-size:14px;}

/* ---------- Cards ---------- */
.card{
  background:#fff;
  border-radius:10px;
  border:1px solid var(--border);
  padding:20px;
}
.card-row{display:flex; gap:20px; flex-wrap:wrap; margin-bottom:20px;}
.stat-card{
  flex:1; min-width:220px;
  border-radius:10px;
  padding:20px;
  color:#fff;
}
.stat-card .stat-label{font-size:12px; font-weight:700; letter-spacing:.4px; text-transform:uppercase; opacity:.9; display:flex; justify-content:space-between;}
.stat-card .stat-value{font-size:30px; font-weight:800; margin:10px 0;}
.stat-card .stat-foot{font-size:12px; opacity:.85; border-top:1px solid rgba(255,255,255,.25); padding-top:8px;}
.stat-purple{background:linear-gradient(135deg,#7c3aed,#6d28d9);}
.stat-green{background:linear-gradient(135deg,#16a34a,#15803d);}
.stat-orange{background:linear-gradient(135deg,#f59e0b,#d97706);}
.stat-blue{background:linear-gradient(135deg,#1d4ed8,#1e3a8a);}

.mini-stat{
  flex:1; min-width:200px; background:#fff; border:1px solid var(--border); border-radius:10px; padding:18px; text-align:center;
}
.mini-stat .mini-label{font-size:11px; font-weight:700; color:var(--text-muted); text-transform:uppercase;}
.mini-stat .mini-value{font-size:26px; font-weight:800; margin-top:8px;}

/* ---------- Forms ---------- */
label{display:block; font-size:11px; font-weight:700; text-transform:uppercase; color:#374151; margin-bottom:6px; letter-spacing:.3px;}
input[type=text], input[type=number], input[type=password], input[type=date], input[type=file], select, textarea{
  width:100%;
  padding:10px 12px;
  border:1px solid #d1d5db;
  border-radius:8px;
  font-size:14px;
  margin-bottom:16px;
  background:#fff;
  color:var(--text-main);
}
textarea{resize:vertical; min-height:60px;}
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:12px 20px;
  border-radius:8px;
  font-weight:700;
  font-size:14px;
  border:none;
  cursor:pointer;
  text-align:center;
}
.btn-block{width:100%;}
.btn-primary{background:var(--accent-blue); color:#fff;}
.btn-primary:hover{background:#1d4ed8;}
.btn-dark{background:#111827; color:#fff;}
.btn-green{background:var(--accent-green); color:#fff;}
.btn-red{background:#fff; color:var(--accent-red); border:1px solid var(--accent-red);}
.btn-red-solid{background:var(--accent-red); color:#fff;}
.btn-outline{background:#fff; color:var(--text-main); border:1px solid #d1d5db;}
.btn-sm{padding:6px 12px; font-size:12.5px;}

.tabs{display:flex; gap:8px; margin-bottom:20px;}
.tabs a{flex:1; text-align:center; padding:10px; border-radius:8px; font-weight:700; font-size:14px; background:#f3f4f6; color:#374151;}
.tabs a.active{background:var(--accent-blue); color:#fff;}

/* ---------- Tables ---------- */
.table-responsive{width:100%; overflow-x:auto; -webkit-overflow-scrolling:touch;}
table{width:100%; border-collapse:collapse; min-width:640px;}
thead th{
  text-align:left; font-size:11.5px; text-transform:uppercase; letter-spacing:.4px;
  color:var(--text-muted); padding:12px 14px; border-bottom:1px solid var(--border);
  white-space:nowrap;
}
tbody td{padding:14px; border-bottom:1px solid var(--border); font-size:14px;}
tbody tr:last-child td{border-bottom:none;}
.empty-state{padding:50px 20px; text-align:center; color:var(--text-muted);}

.badge{padding:4px 10px; border-radius:20px; font-size:11.5px; font-weight:700; display:inline-block;}
.badge-green{background:#dcfce7; color:#166534;}
.badge-red{background:#fee2e2; color:#991b1b;}
.badge-gray{background:#f3f4f6; color:#374151;}
.badge-blue{background:#dbeafe; color:#1e40af;}

.alert{padding:12px 16px; border-radius:8px; margin-bottom:18px; font-size:14px; font-weight:600;}
.alert-success{background:#dcfce7; color:#166534; border:1px solid #86efac;}
.alert-error{background:#fee2e2; color:#991b1b; border:1px solid #fca5a5;}

.grid-3{display:grid; grid-template-columns:repeat(3,1fr); gap:20px;}
.grid-2{display:grid; grid-template-columns:2fr 1fr; gap:20px;}
@media(max-width:1100px){.grid-3{grid-template-columns:1fr;} .grid-2{grid-template-columns:1fr;}}

.danger-card{border:1px solid #fecaca; border-radius:10px; padding:20px; background:#fff;}
.danger-card h3{color:var(--accent-red); margin-top:0;}

/* ---------- Login ---------- */
.login-wrap{flex:1; display:flex; align-items:center; justify-content:center; background:var(--bg-page);}
.login-box{width:380px; background:#fff; border-radius:12px; padding:36px; border:1px solid var(--border);}
.login-box h1{font-size:18px; font-weight:800; text-align:center; margin-bottom:2px;}
.login-box p.sub{text-align:center; color:var(--text-muted); font-size:13px; margin-top:0; margin-bottom:24px;}

/* ---------- Sell terminal ---------- */
.voucher-grid{display:flex; gap:20px; flex-wrap:wrap;}
.voucher-tile{
  flex:1; min-width:220px; background:#fff; border:1px solid var(--border); border-radius:10px; padding:24px; text-align:center;
}
.voucher-tile .avail-pill{
  display:inline-block; background:#dcfce7; color:#166534; padding:4px 12px; border-radius:20px; font-size:12px; font-weight:700; margin-bottom:12px;
}
.voucher-tile .price{font-size:30px; font-weight:800; color:var(--accent-blue); margin-bottom:16px;}

.modal-overlay{
  position:fixed; inset:0; background:rgba(0,0,0,.45);
  display:flex; align-items:center; justify-content:center; z-index:50;
}
.modal-box{background:#fff; border-radius:12px; padding:32px; width:400px; text-align:center;}
.modal-box .pay-total-label{font-size:12px; font-weight:700; color:var(--text-muted); text-transform:uppercase;}
.modal-box .pay-total{font-size:34px; font-weight:800; color:var(--accent-green); margin:8px 0 20px;}
.pay-methods{display:flex; gap:10px; margin-bottom:20px;}
.pay-method{
  flex:1; padding:14px; border-radius:8px; border:2px solid #d1d5db; font-weight:700; cursor:pointer; background:#fff;
}
.pay-method.selected{border-color:var(--accent-blue); color:var(--accent-blue);}
.pay-method.dark-selected{background:#111827; color:#fff; border-color:#111827;}

.receipt-code{font-size:44px; font-weight:800; letter-spacing:2px; margin:14px 0;}
.check-circle{
  width:64px; height:64px; border-radius:50%; background:var(--accent-green); color:#fff;
  display:flex; align-items:center; justify-content:center; font-size:30px; margin:0 auto 12px;
}

.recent-list .tx-row{display:flex; justify-content:space-between; align-items:center; padding:12px 0; border-bottom:1px solid var(--border);}
.recent-list .tx-row:last-child{border-bottom:none;}

/* ============================================================
   RESPONSIVE BREAKPOINTS
   ============================================================ */

/* Tablets and below: sidebar becomes an off-canvas drawer */
@media (max-width: 900px){
  .sidebar{
    position:fixed;
    left:0; top:0;
    height:100vh;
    transform:translateX(-100%);
    box-shadow:4px 0 24px rgba(0,0,0,.25);
  }
  .sidebar.open{transform:translateX(0);}
  .sidebar-overlay.show{display:block;}
  .menu-toggle{display:flex;}
  .main{width:100%;}
  .content{padding:20px;}
  .topbar{padding:12px 16px;}
  .grid-3{grid-template-columns:1fr;}
  .grid-2{grid-template-columns:1fr;}
}

/* Medium screens: tighten card grids, shrink stat text a touch */
@media (max-width: 1100px){
  .grid-3{grid-template-columns:1fr;}
  .grid-2{grid-template-columns:1fr;}
  .voucher-tile{min-width:calc(50% - 10px);}
}

/* Small tablets / large phones */
@media (max-width: 700px){
  .content{padding:16px;}
  h2.page-title{font-size:21px;}
  .card{padding:16px;}
  .card-row{gap:12px;}
  .stat-card{min-width:100%; padding:16px;}
  .stat-card .stat-value{font-size:24px;}
  .mini-stat{min-width:calc(50% - 6px); padding:14px;}
  .mini-stat .mini-value{font-size:20px;}
  .voucher-grid{gap:12px;}
  .voucher-tile{min-width:calc(50% - 6px); padding:16px;}
  .voucher-tile .price{font-size:24px;}
  .tabs a{font-size:12.5px; padding:8px 4px;}
  .topbar .user-name, .topbar .user-role{display:none;}
  .topbar .title{font-size:12.5px;}
  .modal-box{width:92vw; padding:24px;}
  .login-box{width:92vw; padding:26px;}
  form[method] > div[style*="display:flex"]{flex-wrap:wrap;}
}

/* Phones */
@media (max-width: 480px){
  .content{padding:12px;}
  .sidebar{width:250px; min-width:250px;}
  h2.page-title{font-size:19px;}
  .stat-card .stat-value{font-size:22px;}
  .mini-stat{min-width:100%;}
  .voucher-tile{min-width:100%;}
  .receipt-code{font-size:32px;}
  table{min-width:520px;}
  .btn{padding:11px 14px; font-size:13px;}
  .avatar{width:30px; height:30px; font-size:13px;}
  .branch-pill{font-size:10px; padding:3px 8px;}
}

/* Print: receipts only */
@media print{
  .sidebar, .topbar, .sidebar-overlay, .btn, form button, a.btn{display:none !important;}
  body{background:#fff;}
  .content{padding:0;}
  .modal-overlay{position:static; background:none;}
  .modal-box{box-shadow:none; width:100%;}
}