:root {
  --teal: #0D9488;
  --cyan: #06B6D4;
  --bg: #F4F7FB;
  --bg-panel: #FFFFFF;
  --bg-panel-2: #F1F5F9;
  --border: #E2E8F0;
  --text: #1E293B;
  --text-muted: #64748B;
  --danger: #DC2626;
  --warning: #D97706;
  --success: #059669;
  --radius: 14px;
}

* { box-sizing: border-box; }

body {
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(13,148,136,0.06), transparent),
    radial-gradient(1200px 600px at 90% 0%, rgba(6,182,212,0.05), transparent),
    var(--bg);
  color: var(--text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  min-height: 100vh;
}

a { text-decoration: none; }

/* ---------- Sidebar ---------- */
.sidebar {
  width: 250px;
  min-height: 100vh;
  background: #FFFFFF;
  border-right: 1px solid var(--border);
  position: fixed;
  top: 0; left: 0; bottom: 0;
  padding: 22px 14px;
  z-index: 100;
  box-shadow: 2px 0 12px rgba(15,23,42,0.03);
}
.sidebar .brand {
  display: flex; align-items: center; gap: 10px;
  padding: 0 8px 22px 8px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 18px;
}
.sidebar .brand .logo {
  width: 38px; height: 38px; border-radius: 10px;
  background: linear-gradient(135deg, var(--teal), var(--cyan));
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; color: #fff; font-size: 18px;
}
.sidebar .brand h5 { margin: 0; font-weight: 700; font-size: 16px; color: var(--text); }
.sidebar .brand small { color: var(--text-muted); font-size: 11px; }

.nav-link-item {
  display: flex; align-items: center; gap: 12px;
  padding: 11px 14px; border-radius: 10px;
  color: var(--text-muted); font-size: 14.5px; font-weight: 500;
  margin-bottom: 4px; transition: all .15s ease; cursor: pointer;
}
.nav-link-item:hover { background: var(--bg-panel-2); color: var(--text); }
.nav-link-item.active {
  background: linear-gradient(90deg, rgba(13,148,136,0.12), rgba(6,182,212,0.05));
  color: var(--teal); border: 1px solid rgba(13,148,136,0.3); font-weight: 600;
}
.nav-link-item i { width: 18px; }

.main-content { margin-left: 250px; padding: 26px 30px; min-height: 100vh; }

.topbar {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 24px;
}
.topbar h3 { margin: 0; font-weight: 700; color: var(--text); }
.topbar p { margin: 0; color: var(--text-muted); font-size: 13px; }

.user-chip {
  display: flex; align-items: center; gap: 10px;
  background: var(--bg-panel); border: 1px solid var(--border);
  padding: 6px 14px 6px 6px; border-radius: 30px; cursor: pointer;
}
.user-chip .avatar {
  width: 32px; height: 32px; border-radius: 50%;
  background: linear-gradient(135deg, var(--teal), var(--cyan));
  display: flex; align-items: center; justify-content: center; font-weight: 700; color: #fff; font-size: 13px;
}

/* ---------- Cards ---------- */
.card-dark {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: 0 1px 3px rgba(15,23,42,0.04);
}
.stat-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  position: relative; overflow: hidden;
  box-shadow: 0 1px 3px rgba(15,23,42,0.04);
}
.stat-card .icon-box {
  width: 42px; height: 42px; border-radius: 11px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(13,148,136,0.1); color: var(--teal); font-size: 18px; margin-bottom: 12px;
}
.stat-card h4 { margin: 0; font-weight: 700; color: var(--text); font-size: 24px; }
.stat-card p { margin: 0; color: var(--text-muted); font-size: 13px; }
.stat-card .trend { font-size: 12px; font-weight: 600; }

/* ---------- Buttons ---------- */
.btn-teal {
  background: linear-gradient(135deg, var(--teal), var(--cyan));
  border: none; color: #fff; font-weight: 600;
  padding: 9px 18px; border-radius: 10px; transition: .15s;
}
.btn-teal:hover { filter: brightness(1.08); color: #fff; }
.btn-outline-teal {
  border: 1px solid var(--teal); color: var(--teal); background: transparent;
  padding: 8px 16px; border-radius: 10px; font-weight: 600;
}
.btn-outline-teal:hover { background: rgba(13,148,136,0.08); color: var(--teal); }
.btn-ghost {
  background: var(--bg-panel-2); border: 1px solid var(--border); color: var(--text);
  border-radius: 10px;
}
.btn-ghost:hover { background: #E2E8F0; color: var(--text); }

/* ---------- Forms ---------- */
.form-control-dark, .form-select-dark {
  background: #FFFFFF !important;
  border: 1px solid var(--border) !important;
  color: var(--text) !important;
  border-radius: 10px !important;
  padding: 9px 13px !important;
}
.form-control-dark:focus, .form-select-dark:focus {
  border-color: var(--teal) !important;
  box-shadow: 0 0 0 3px rgba(13,148,136,0.12) !important;
}
.form-control-dark::placeholder { color: var(--text-muted); }
label.form-label-dark { color: var(--text-muted); font-size: 12.5px; font-weight: 600; margin-bottom: 6px; text-transform: uppercase; letter-spacing: .03em; }

/* ---------- Table ---------- */
.table-dark-custom { width: 100%; color: var(--text); border-collapse: collapse; }
.table-dark-custom thead th {
  color: var(--text-muted); font-size: 11.5px; text-transform: uppercase; letter-spacing: .04em;
  font-weight: 600; border-bottom: 1px solid var(--border); padding: 10px 14px; text-align: left;
}
.table-dark-custom tbody td { padding: 13px 14px; border-bottom: 1px solid var(--border); font-size: 14px; vertical-align: middle; }
.table-dark-custom tbody tr:hover { background: var(--bg-panel-2); }

.badge-soft { padding: 5px 11px; border-radius: 20px; font-size: 11.5px; font-weight: 600; }
.badge-green { background: rgba(5,150,105,0.1); color: var(--success); }
.badge-red { background: rgba(220,38,38,0.1); color: var(--danger); }
.badge-yellow { background: rgba(217,119,6,0.1); color: var(--warning); }
.badge-teal { background: rgba(13,148,136,0.1); color: var(--teal); }

/* ---------- Login ---------- */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px; }
.login-card {
  width: 100%; max-width: 400px; background: var(--bg-panel);
  border: 1px solid var(--border); border-radius: 20px; padding: 38px 34px;
  box-shadow: 0 20px 60px rgba(15,23,42,0.1);
}
.login-card .logo-big {
  width: 62px; height: 62px; border-radius: 16px; margin: 0 auto 16px;
  background: linear-gradient(135deg, var(--teal), var(--cyan));
  display: flex; align-items: center; justify-content: center; font-size: 28px; color: #fff; font-weight: 700;
}

/* ---------- Medicine POS grid (Invoicing) ---------- */
.med-search-bar { position: relative; }
.med-search-bar i { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); color: var(--text-muted); }
.med-search-bar input { padding-left: 40px !important; }

.category-pills { display: flex; gap: 8px; flex-wrap: wrap; margin: 14px 0 16px; }
.pill {
  padding: 7px 15px; border-radius: 20px; font-size: 13px; font-weight: 600;
  background: var(--bg-panel-2); border: 1px solid var(--border); color: var(--text-muted); cursor: pointer; white-space: nowrap;
}
.pill.active { background: linear-gradient(135deg, var(--teal), var(--cyan)); color: #fff; border-color: transparent; }

.med-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 12px; max-height: calc(100vh - 300px); overflow-y: auto; padding-right: 4px;
}
.med-card {
  background: var(--bg-panel); border: 1px solid var(--border); border-radius: 12px;
  padding: 13px; cursor: pointer; transition: .12s; position: relative;
}
.med-card:hover { border-color: var(--teal); box-shadow: 0 6px 16px rgba(13,148,136,0.12); transform: translateY(-2px); }
.med-card:active { transform: scale(0.97); }
.med-card.out-of-stock { opacity: 0.5; cursor: not-allowed; }
.med-card .m-icon {
  width: 36px; height: 36px; border-radius: 9px; background: rgba(13,148,136,0.1); color: var(--teal);
  display: flex; align-items: center; justify-content: center; margin-bottom: 8px; font-size: 15px;
}
.med-card .m-name { font-size: 13.5px; font-weight: 600; color: var(--text); margin-bottom: 2px; line-height: 1.25; }
.med-card .m-meta { font-size: 11px; color: var(--text-muted); margin-bottom: 6px; }
.med-card .m-price { font-size: 14px; font-weight: 700; color: var(--teal); }
.med-card .m-stock-badge {
  position: absolute; top: 8px; right: 8px; font-size: 9.5px; padding: 2px 7px; border-radius: 10px; font-weight: 700;
}

/* Invoice slip panel */
.invoice-panel {
  background: var(--bg-panel); border: 1px solid var(--border); border-radius: var(--radius);
  display: flex; flex-direction: column; height: calc(100vh - 130px); position: sticky; top: 20px;
  box-shadow: 0 1px 3px rgba(15,23,42,0.04);
}
.invoice-panel .ip-header { padding: 16px 18px; border-bottom: 1px solid var(--border); }
.invoice-items { flex: 1; overflow-y: auto; padding: 8px 12px; }
.invoice-empty { text-align: center; color: var(--text-muted); padding: 60px 20px; font-size: 13.5px; }
.invoice-line {
  display: flex; align-items: center; gap: 10px; padding: 10px 6px; border-bottom: 1px solid var(--border);
}
.invoice-line .il-name { font-size: 13.5px; font-weight: 600; color: var(--text); }
.invoice-line .il-price { font-size: 11.5px; color: var(--text-muted); }
.qty-control { display: flex; align-items: center; gap: 6px; background: var(--bg-panel-2); border-radius: 8px; padding: 3px; border: 1px solid var(--border); }
.qty-control button {
  width: 22px; height: 22px; border-radius: 6px; border: none; background: transparent; color: var(--teal); font-weight: 700; font-size: 14px; line-height: 1;
}
.qty-control button:hover { background: rgba(13,148,136,0.12); }
.qty-control span { width: 22px; text-align: center; font-size: 13px; font-weight: 600; color: var(--text); }
.il-remove { color: var(--danger); background: none; border: none; font-size: 15px; padding: 4px; }

.invoice-footer { border-top: 1px solid var(--border); padding: 14px 18px 18px; }
.calc-row { display: flex; justify-content: space-between; align-items: center; font-size: 13.5px; margin-bottom: 8px; color: var(--text-muted); }
.calc-row.total { font-size: 17px; font-weight: 700; color: var(--text); border-top: 1px dashed var(--border); padding-top: 10px; margin-top: 4px; }
.mini-input { width: 60px; background: var(--bg-panel-2); border: 1px solid var(--border); color: var(--text); border-radius: 7px; padding: 4px 6px; font-size: 12.5px; text-align: center; }
.discount-tax-row { display: flex; gap: 8px; margin-bottom: 10px; }
.discount-tax-row .dt-box { flex: 1; background: var(--bg-panel-2); border: 1px solid var(--border); border-radius: 9px; padding: 8px 10px; }
.discount-tax-row label { font-size: 10.5px; color: var(--text-muted); text-transform: uppercase; font-weight: 700; letter-spacing: .03em; display: block; margin-bottom: 3px; }
.discount-tax-row .dt-input-group { display: flex; align-items: center; }
.discount-tax-row input { background: transparent; border: none; color: var(--text); font-weight: 700; font-size: 14px; width: 100%; outline: none; }
.discount-tax-row .unit-toggle { display: flex; background: var(--bg-panel); border-radius: 6px; overflow: hidden; border: 1px solid var(--border); }
.discount-tax-row .unit-toggle span { padding: 3px 7px; font-size: 10.5px; font-weight: 700; cursor: pointer; color: var(--text-muted); }
.discount-tax-row .unit-toggle span.active { background: var(--teal); color: #fff; }

/* Receipt print page */
.receipt {
  width: 320px; margin: 30px auto; background: #fff; color: #111; padding: 20px; font-family: 'Courier New', monospace; font-size: 12.5px;
  border: 1px solid var(--border); box-shadow: 0 1px 3px rgba(15,23,42,0.06);
}
.receipt hr { border-top: 1px dashed #999; }
.receipt .r-title { text-align: center; font-weight: 700; font-size: 15px; }
.receipt table { width: 100%; font-size: 11.5px; }
.receipt td { padding: 2px 0; }
@media print {
  .no-print, .sidebar, .topbar { display: none !important; }
  .main-content { margin-left: 0 !important; padding: 0 !important; }
  .receipt { margin: 0; width: 100%; border: none; box-shadow: none; }
  body { background: #fff; }
}

/* Scrollbars */
::-webkit-scrollbar { width: 7px; height: 7px; }
::-webkit-scrollbar-thumb { background: #CBD5E1; border-radius: 10px; }
::-webkit-scrollbar-track { background: transparent; }

@media (max-width: 991px) {
  .sidebar { transform: translateX(-100%); transition: .2s; }
  .sidebar.show { transform: translateX(0); }
  .main-content { margin-left: 0; padding: 18px; }
  .invoice-panel { height: auto; position: static; margin-top: 20px; }
}