/* =====================================================
   Shoplink POS — Mobile & Tablet Optimized Styles
   Mobile-first, accessible, and performance-minded.
   Breakpoints:
     - --bp-sm: 480px (small phones)
     - --bp-md: 768px (tablets / small landscape)
     - --bp-lg: 1024px (large tablets / small laptops)
   ===================================================== */

:root{
  --bg: #f7f8fb;
  --panel: #ffffff;
  --panel-muted: #f2f4f8;
  --text: #0f172a;
  --text-muted: #475569;
  --border: #e5e7eb;
  --brand: #2563eb;
  --brand-600:#1d4ed8;
  --brand-700:#1e40af;
  --success:#16a34a;
  --warning:#d97706;
  --danger:#dc2626;
  --radius: 14px;
  --shadow: 0 8px 24px rgba(2, 6, 23, .07);
  --focus: 0 0 0 3px rgba(37,99,235,.25);
  --bp-sm: 480px;
  --bp-md: 768px;
  --bp-lg: 1024px;
}

*{ box-sizing: border-box; }
html, body { height: 100%; }
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family: Inter, Roboto, "Segoe UI", system-ui, -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  line-height: 1.45;
}

/* ---------------- Layout ---------------- */
.app{
  min-height: 100dvh;
  display:grid;
  grid-template-rows: auto 1fr auto;
  grid-template-columns: 1fr;
}

/* Top bar */
.topbar{
  position: sticky; top:0; z-index: 50;
  background: var(--panel);
  box-shadow: var(--shadow);
  padding: 12px clamp(12px, 3vw, 20px);
  display:flex; gap:12px; align-items:center; justify-content:space-between;
}
.topbar .brand{ font-weight: 700; letter-spacing:.2px; }
.topbar .brand small{ color: var(--text-muted); font-weight: 500; margin-left:6px;}

/* Bottom nav (mobile) */
.navbar{
  position: sticky; bottom:0; z-index: 40;
  background: var(--panel);
  border-top:1px solid var(--border);
  display:grid; grid-template-columns: repeat(4, 1fr);
}
.nav-item{
  padding:10px 6px;
  text-align:center;
  color: var(--text-muted);
  font-size: 12px;
  line-height:1.1;
}
.nav-item.active{ color: var(--brand); font-weight: 600; }
.nav-item i{ display:block; font-style:normal; font-size:18px; margin-bottom:4px; }

/* Sidebar (appears from md and up) */
.sidebar{
  display:none;
}
@media (min-width: 768px){
  .app{
    grid-template-columns: 260px 1fr;
    grid-template-rows: auto 1fr;
  }
  .sidebar{
    display:block;
    grid-row: 1 / span 2;
    background:#0b1220;
    color:#cbd5e1;
    padding:16px 10px;
  }
  .sidebar .nav-group{ display:flex; flex-direction:column; gap:6px; margin-top:8px; }
  .sidebar .nav-link{
    display:flex; align-items:center; gap:10px;
    padding:10px 12px; border-radius:10px; color:#cbd5e1; text-decoration:none;
  }
  .sidebar .nav-link.active{ background:#1f2a44; color:#fff; font-weight:600; }
  .navbar{ display:none; }
}

/* Content area */
.container{
  padding: 14px clamp(12px, 4vw, 28px);
  display:grid; gap:14px;
}
@media (min-width: 768px){
  .container{ gap:18px; padding: 18px 24px; }
}

/* Cards */
.card{
  background: var(--panel);
  border:1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.card-body{ padding: 14px; }
.card-header{
  padding: 14px;
  border-bottom:1px solid var(--border);
  display:flex; align-items:center; justify-content:space-between; gap:10px;
}
.card-title{ font-size: 16px; font-weight: 700; }
.card-subtle{ color: var(--text-muted); font-size:13px; }

/* ---------------- Controls ---------------- */
.input, .select, .button, .upload{
  font: inherit;
  border-radius: 12px;
  border:1px solid var(--border);
  background:#fff;
  padding:12px 12px;
  min-height: 44px; /* touch target */
}
.input, .select{ width: 100%; }
.input::placeholder{ color:#9aa4b2; }

.button{
  display:inline-flex; align-items:center; justify-content:center;
  gap:10px; text-decoration:none; cursor:pointer; user-select:none;
  font-weight: 600;
  transition: transform .04s ease, box-shadow .2s ease, background .2s ease, color .2s ease;
}
.button:active{ transform: translateY(1px); }
.button:focus-visible{ outline: none; box-shadow: var(--focus); }

.button.primary{ background: var(--brand); color:#fff; border-color: transparent; }
.button.primary:hover{ background: var(--brand-600); }
.button.primary:active{ background: var(--brand-700); }

.button.ghost{ background: #fff; color: var(--brand); border-color: var(--brand); }
.button.ghost:hover{ background: #f0f5ff; }

.button.mono{ background:#0b1220; color:#fff; border-color:#0b1220; }

/* Input groups */
.input-row{
  display:grid; gap:10px; grid-template-columns: 1fr;
}
@media (min-width: 480px){
  .input-row{ grid-template-columns: 1fr auto; }
}
@media (min-width: 768px){
  .input-row{ grid-template-columns: minmax(220px, 1.2fr) 160px 150px; }
}

/* File upload (drag & drop ready) */
.upload{
  display:grid; grid-template-columns: 1fr auto; align-items:center; gap:10px;
}
.upload.drag{
  border-style:dashed; background: var(--panel-muted);
}

/* Scan pill */
.pill{
  display:inline-flex; align-items:center; gap:8px;
  background: var(--panel-muted);
  border:1px dashed var(--border);
  padding:8px 10px; border-radius: 999px;
  font-size: 13px; color:var(--text-muted);
}

/* ---------------- Tables ---------------- */
/* Mobile-first stacked table */
.table{
  width:100%;
  border-collapse: separate;
  border-spacing:0;
  background:#fff;
  border:1px solid var(--border);
  border-radius: var(--radius);
  overflow:hidden;
}
.table thead{ display:none; }
.table tr{ display:grid; grid-template-columns: 1fr 1fr; gap:8px; padding:12px; border-bottom:1px solid var(--border); }
.table tr:last-child{ border-bottom:none; }
.table td{
  font-size: 13px;
  display:flex; align-items:center; justify-content:space-between; gap:8px;
}
.table td::before{
  content: attr(data-label);
  color: var(--text-muted);
  font-weight: 600;
  margin-right:10px;
}

/* Tablet & up: true table */
@media (min-width: 768px){
  .table thead{ display:table-header-group; background: var(--panel-muted); }
  .table tr{ display:table-row; }
  .table th, .table td{
    display: table-cell;
    padding: 12px 14px;
    border-bottom:1px solid var(--border);
    font-size:14px;
  }
  .table th{
    text-align:left; font-weight:700; color:var(--text);
  }
  .table td::before{ content: none; }
  .table tbody tr:nth-child(even){ background:#fbfdff; }
}

/* Sticky table header (tablet+) */
@media (min-width: 768px){
  .table thead th{ position: sticky; top:0; z-index: 1; }
}

/* Row actions (icon buttons) */
.row-actions{
  display:flex; gap:8px; align-items:center;
}
.icon-btn{
  width:36px; height:36px; display:grid; place-items:center;
  border-radius:10px; border:1px solid var(--border); background:#fff; cursor:pointer;
}
.icon-btn:focus-visible{ outline:none; box-shadow: var(--focus); }
.icon-btn.danger{ border-color:#fecaca; background:#fff1f2; color:#b91c1c; }

/* Status badges */
.badge{
  display:inline-flex; align-items:center; gap:6px; padding:6px 10px;
  border-radius:999px; font-size:12px; font-weight:600;
}
.badge.success{ background:#eaf8ef; color:#0f6d2d; border:1px solid #c7f0d1; }
.badge.warn{ background:#fff7ed; color:#9a3412; border:1px solid #fed7aa; }
.badge.info{ background:#eef2ff; color:#3730a3; border:1px solid #c7d2fe; }

/* Section headings */
.h-section{
  display:flex; align-items:center; justify-content:space-between; gap:10px;
  margin: 6px 2px;
}
.h-section h2{ font-size: clamp(16px, 2.6vw, 20px); margin:0; }
.h-section .meta{ color: var(--text-muted); font-size: 12px; }

/* Utilities */
.mt-2{ margin-top:8px; } .mt-3{ margin-top:12px; } .mt-4{ margin-top:16px; }
.grid{ display:grid; gap:12px; }
.grid-2{ grid-template-columns: 1fr 1fr; }
@media (min-width: 768px){ .grid-2{ gap:14px; } }
.hidden-sm{ display:none; } @media (min-width: 768px){ .hidden-sm{ display:initial; } }

/* Toasts */
.toast{
  position: fixed; left: 50%; transform: translateX(-50%);
  bottom: 16px; z-index: 60; display:grid; gap:8px; width: min(92vw, 520px);
}
.toast .item{
  background:#0b1220; color:#fff; padding:12px 14px;
  border-radius: 12px; box-shadow: var(--shadow);
}

/* Focus & reduced motion */
:focus-visible{ outline: none; box-shadow: var(--focus); }
@media (prefers-reduced-motion: reduce){
  *{ transition:none !important; animation:none !important; }
}

.promo-row {
  background: #fff3cd !important;
}