/* Shaheen Network Billing — Design System
   Approved palette only. No colors outside these tokens. */

:root {
  --primary: #155EEF;
  --primary-dark: #0B2A5B;
  --secondary-cyan: #06B6D4;
  --accent-orange: #FF8A00;
  --success: #16A34A;
  --warning: #F59E0B;
  --danger: #DC2626;
  --info: #0EA5E9;
  --bg: #F5F8FC;
  --card: #FFFFFF;
  --text: #172033;
  --text-secondary: #64748B;
  --border: #E2E8F0;

  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 1px 2px rgba(23, 32, 51, 0.06), 0 1px 3px rgba(23, 32, 51, 0.08);
  --sidebar-width: 260px;
  --topbar-height: 64px;
}

* { 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);
  font-size: 15px;
  line-height: 1.5;
}

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

/* ---------- App Shell ---------- */

#nav-toggle { display: none; }

.app-shell {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  background: var(--primary-dark);
  color: #FFFFFF;
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.sidebar-brand {
  padding: 20px;
  font-size: 18px;
  font-weight: 700;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}

.sidebar-brand small {
  display: block;
  font-weight: 400;
  font-size: 12px;
  color: rgba(255,255,255,0.65);
  margin-top: 2px;
}

.sidebar-nav {
  padding: 12px 0;
  flex: 1;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 20px;
  color: rgba(255,255,255,0.85);
  font-size: 14px;
  font-weight: 500;
}

.sidebar-link:hover {
  background: rgba(255,255,255,0.06);
  text-decoration: none;
  color: #fff;
}

.sidebar-link.active {
  background: var(--primary);
  color: #fff;
}

.sidebar-areas summary {
  cursor: pointer;
  list-style: none;
}
.sidebar-areas summary::-webkit-details-marker { display: none; }

.sidebar-areas[open] summary .chevron { transform: rotate(90deg); }
.chevron { display: inline-block; transition: transform 0.15s; margin-left: auto; }

.sidebar-subnav { padding-left: 12px; }

.sidebar-sublink {
  display: flex;
  justify-content: space-between;
  padding: 9px 20px 9px 34px;
  color: rgba(255,255,255,0.72);
  font-size: 13.5px;
}
.sidebar-sublink:hover { background: rgba(255,255,255,0.06); color: #fff; text-decoration: none; }
.sidebar-sublink.active { background: rgba(21,94,239,0.35); color: #fff; font-weight: 600; }
.sidebar-sublink .code-pill {
  background: rgba(255,255,255,0.15);
  border-radius: 999px;
  padding: 1px 8px;
  font-size: 11px;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid rgba(255,255,255,0.12);
  font-size: 13px;
}
.sidebar-footer .role-badge {
  display: inline-block;
  background: var(--secondary-cyan);
  color: #04303a;
  border-radius: 999px;
  padding: 2px 10px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.app-main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.app-topbar {
  height: var(--topbar-height);
  background: var(--card);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 5;
}

.topbar-title { font-size: 18px; font-weight: 700; }

.hamburger {
  display: none;
  cursor: pointer;
  font-size: 20px;
  color: var(--text);
  background: none;
  border: none;
}

.app-content {
  padding: 24px;
  flex: 1;
}

/* ---------- Components ---------- */

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  margin-bottom: 20px;
}

.card-title {
  font-size: 15px;
  font-weight: 700;
  margin: 0 0 14px;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: var(--shadow);
}
.stat-card .label { font-size: 13px; color: var(--text-secondary); font-weight: 600; }
.stat-card .value { font-size: 26px; font-weight: 800; margin-top: 6px; color: var(--primary-dark); }
.stat-card.accent-orange .value { color: var(--accent-orange); }
.stat-card.accent-success .value { color: var(--success); }
.stat-card.accent-danger .value { color: var(--danger); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  background: var(--primary);
  color: #fff;
}
.btn:hover { text-decoration: none; opacity: 0.92; }
.btn-secondary { background: #fff; color: var(--text); border-color: var(--border); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-sm { padding: 6px 12px; font-size: 13px; }

.form-group { margin-bottom: 16px; }
.form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; }
label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: var(--text); }
.hint { font-size: 12px; color: var(--text-secondary); margin-top: 4px; }

input[type=text], input[type=tel], input[type=number], input[type=date], input[type=password],
select, textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  background: #fff;
  color: var(--text);
  font-family: inherit;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(21,94,239,0.15);
}

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th { text-align: left; padding: 10px 12px; color: var(--text-secondary); font-weight: 600; font-size: 12.5px; text-transform: uppercase; border-bottom: 1px solid var(--border); }
td { padding: 12px; border-bottom: 1px solid var(--border); vertical-align: middle; }
tr:hover td { background: #FAFBFF; }

.badge { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 700; }
.badge-active, .badge-paid, .badge-completed { background: rgba(22,163,74,0.12); color: var(--success); }
.badge-suspended, .badge-pending, .badge-due_soon { background: rgba(245,158,11,0.14); color: var(--warning); }
.badge-permanently_disconnected, .badge-overdue, .badge-danger { background: rgba(220,38,38,0.1); color: var(--danger); }
.badge-temporarily_disconnected, .badge-inactive, .badge-cancelled { background: rgba(100,116,139,0.14); color: var(--text-secondary); }
.badge-info, .badge-upcoming, .badge-partially_paid { background: rgba(14,165,233,0.12); color: var(--info); }

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 20px; overflow-x: auto; }
.tab { padding: 10px 16px; font-size: 14px; font-weight: 600; color: var(--text-secondary); border-bottom: 2px solid transparent; white-space: nowrap; }
.tab.active { color: var(--primary); border-bottom-color: var(--primary); }
.tab:hover { text-decoration: none; color: var(--primary); }

.flash { padding: 12px 16px; border-radius: var(--radius-sm); margin-bottom: 16px; font-size: 14px; font-weight: 500; }
.flash-success { background: rgba(22,163,74,0.1); color: var(--success); border: 1px solid rgba(22,163,74,0.25); }
.flash-error { background: rgba(220,38,38,0.08); color: var(--danger); border: 1px solid rgba(220,38,38,0.22); }

.empty-state { text-align: center; padding: 40px 20px; color: var(--text-secondary); }
.empty-state .icon { font-size: 32px; margin-bottom: 8px; }

.search-bar { display: flex; gap: 10px; margin-bottom: 18px; flex-wrap: wrap; }
.search-bar input[type=text] { max-width: 320px; }
.search-bar select { max-width: 200px; }

.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(160deg, var(--primary-dark), var(--primary));
  padding: 20px;
}
.login-card {
  background: #fff;
  border-radius: 14px;
  padding: 36px 32px;
  width: 100%;
  max-width: 380px;
  box-shadow: 0 20px 50px rgba(11,42,91,0.35);
}
.login-card h1 { font-size: 20px; margin: 0 0 4px; }
.login-card p.sub { color: var(--text-secondary); font-size: 13.5px; margin: 0 0 22px; }
.login-card .btn { width: 100%; justify-content: center; margin-top: 6px; }

.field-error { color: var(--danger); font-size: 12.5px; margin-top: 4px; }

.text-muted { color: var(--text-secondary); }
.mb-0 { margin-bottom: 0; }

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .sidebar {
    position: fixed;
    left: -280px;
    z-index: 20;
    transition: left 0.2s ease;
    box-shadow: 0 0 0 100vmax rgba(11,42,91,0);
  }
  #nav-toggle:checked ~ .app-shell .sidebar {
    left: 0;
    box-shadow: 0 0 0 100vmax rgba(11,42,91,0.45);
  }
  .hamburger { display: inline-flex; }
  .app-content { padding: 16px; }
  .stat-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 560px) {
  .stat-grid { grid-template-columns: 1fr; }
  .search-bar input[type=text], .search-bar select { max-width: none; width: 100%; }
  table, thead, tbody, th, td, tr { display: block; }
  thead { display: none; }
  tr { border-bottom: 1px solid var(--border); padding: 10px 0; }
  td { border: none; padding: 4px 0; }
  td::before { content: attr(data-label); display: block; font-size: 11px; color: var(--text-secondary); font-weight: 700; text-transform: uppercase; }
}

/* ---------- Print (admin pages) ---------- */

@media print {
  .no-print, .sidebar, .app-topbar, .hamburger { display: none !important; }
  .app-content { padding: 0 !important; }
  body { background: #fff !important; }
  .card { box-shadow: none !important; border: 1px solid #ccc !important; }
}

/* ---------- Public Invoice ---------- */

.public-invoice-body {
  background: var(--bg);
  min-height: 100vh;
  padding: 24px 16px 60px;
}

.invoice-page {
  max-width: 760px;
  margin: 0 auto;
}

.invoice-actions {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 14px;
}

.invoice-paper {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 36px;
}

.invoice-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 16px;
  padding-bottom: 24px;
  border-bottom: 2px solid var(--border);
  margin-bottom: 24px;
}

.invoice-header .company-name {
  font-size: 22px;
  font-weight: 800;
  color: var(--primary-dark);
}

.invoice-header .company-contact {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 4px;
  line-height: 1.6;
}

.invoice-header .invoice-label {
  text-align: right;
}

.invoice-header .invoice-label .label-text {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-secondary);
}

.invoice-header .invoice-label .invoice-number {
  font-size: 18px;
  font-weight: 800;
  color: var(--text);
  margin: 4px 0 10px;
}

.invoice-banner {
  padding: 14px 18px;
  border-radius: var(--radius);
  margin-bottom: 24px;
  font-weight: 700;
  text-align: center;
  font-size: 15px;
}

.invoice-banner-paid { background: rgba(22,163,74,0.12); color: var(--success); border: 1px solid rgba(22,163,74,0.3); }
.invoice-banner-cancelled { background: rgba(100,116,139,0.14); color: var(--text-secondary); border: 1px solid var(--border); }
.invoice-banner-overdue { background: rgba(220,38,38,0.08); color: var(--danger); border: 1px solid rgba(220,38,38,0.25); }

.invoice-section-title {
  font-size: 12.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  margin: 28px 0 10px;
}

.invoice-summary-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin-top: 16px;
}

.invoice-summary-row {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  font-size: 14px;
}

.invoice-summary-row.total {
  border-top: 1px solid var(--border);
  margin-top: 6px;
  padding-top: 12px;
  font-weight: 700;
  font-size: 15px;
}

.invoice-summary-row.remaining {
  font-weight: 800;
  font-size: 17px;
  color: var(--accent-orange);
}

.invoice-summary-row.remaining.settled { color: var(--success); }

.invoice-footer-note {
  text-align: center;
  font-size: 12.5px;
  color: var(--text-secondary);
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

@media print {
  .public-invoice-body { padding: 0; background: #fff; }
  .invoice-actions { display: none !important; }
  .invoice-paper { box-shadow: none; border: none; padding: 0; }
}

@media (max-width: 560px) {
  .invoice-paper { padding: 20px; }
  .invoice-header { flex-direction: column; }
  .invoice-header .invoice-label { text-align: left; }
}