:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --danger: #dc2626;
  --success: #16a34a;
  --bg: #f4f6f9;
  --surface: #ffffff;
  --border: #e2e8f0;
  --text: #1e293b;
  --text-muted: #64748b;
  --radius: 10px;
  --sidebar-w: 230px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

a { color: var(--primary); text-decoration: none; }

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

.sidebar {
  width: var(--sidebar-w);
  background: #111827;
  color: #e5e7eb;
  flex-shrink: 0;
  padding: 20px 0;
}

.sidebar .brand {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  padding: 0 20px 20px;
  border-bottom: 1px solid #1f2937;
  margin-bottom: 10px;
}

.sidebar nav a {
  display: block;
  padding: 11px 20px;
  color: #cbd5e1;
  font-size: 14px;
}

.sidebar nav a:hover, .sidebar nav a.active {
  background: #1f2937;
  color: #fff;
  border-left: 3px solid var(--primary);
}

.sidebar .user-box {
  margin-top: auto;
  padding: 15px 20px;
  border-top: 1px solid #1f2937;
  font-size: 13px;
}

.main {
  flex: 1;
  padding: 24px 30px;
  max-width: 100%;
  overflow-x: auto;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 22px;
}

.topbar h1 { font-size: 20px; margin: 0; }

/* ---- Kartu / panel ---- */
.card {
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 20px;
  margin-bottom: 20px;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 22px;
}

.stat-card {
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 18px;
}

.stat-card .label { font-size: 13px; color: var(--text-muted); }
.stat-card .value { font-size: 24px; font-weight: 700; margin-top: 4px; }

/* ---- Form ---- */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: var(--text); }

input[type=text], input[type=password], input[type=number], input[type=search],
select, textarea {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  background: #fff;
  color: var(--text);
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.12);
}

.btn {
  display: inline-block;
  padding: 9px 16px;
  border-radius: 8px;
  border: none;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  background: var(--primary);
  color: #fff;
}
.btn:hover { background: var(--primary-dark); }
.btn-danger { background: var(--danger); }
.btn-secondary { background: #e2e8f0; color: var(--text); }
.btn-sm { padding: 5px 10px; font-size: 13px; }

/* ---- Tabel ---- */
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); }
th { color: var(--text-muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.03em; }
tr:hover td { background: #f8fafc; }

/* ---- Alert ---- */
.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
.alert-success { background: #dcfce7; color: #166534; }
.alert-danger { background: #fee2e2; color: #991b1b; }

/* ---- Login page ---- */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1e293b, #0f172a);
}
.login-card {
  background: #fff;
  padding: 36px;
  border-radius: 14px;
  width: 340px;
  box-shadow: 0 20px 40px rgba(0,0,0,0.25);
}
.login-card h1 { font-size: 20px; margin: 0 0 4px; }
.login-card p.sub { color: var(--text-muted); font-size: 13px; margin: 0 0 20px; }

/* ---- Kasir / POS screen ---- */
.pos-layout { display: flex; gap: 20px; align-items: flex-start; }
.pos-produk { flex: 2; }
.pos-keranjang { flex: 1; min-width: 320px; position: sticky; top: 20px; }

.produk-list-wrap { max-height: 560px; overflow-y: auto; border: 1px solid var(--border); border-radius: 10px; }
.produk-list { width: 100%; border-collapse: collapse; font-size: 11pt; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; }
.produk-list thead th {
  position: sticky; top: 0; background: #f8fafc; z-index: 1;
  text-align: left; padding: 9px 12px; font-size: 11px; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: 0.03em; border-bottom: 1px solid var(--border);
}
.produk-list th.kanan, .produk-list td.kanan { text-align: right; }
.produk-list tbody tr.produk-row { cursor: pointer; border-bottom: 1px solid var(--border); }
.produk-list tbody tr.produk-row:hover { background: #eff6ff; }
.produk-list tbody tr.produk-row.dipilih { background: var(--primary); color: #fff; }
.produk-list tbody tr.produk-row.dipilih td { color: #fff; }
.produk-list td { padding: 8px 12px; vertical-align: middle; }
.produk-list td.harga-aktif { color: var(--primary); font-weight: 700; }
.badge-satuan {
  font-size: 10px; font-weight: 600; color: var(--primary); background: #dbeafe;
  padding: 2px 6px; border-radius: 999px; margin-left: 4px;
}

.keranjang-item { display: flex; justify-content: space-between; align-items: center; padding: 8px 0; border-bottom: 1px solid var(--border); font-size: 13px; }
.keranjang-total { display: flex; justify-content: space-between; font-size: 16px; font-weight: 700; margin: 14px 0; }

@media (max-width: 900px) {
  .app-shell { flex-direction: column; }
  .sidebar { width: 100%; }
  .pos-layout { flex-direction: column; }
}