/* ============================================================
   RobRADIUS — design system
   Single CSS file, no build step, no external resources.
   Works offline / air-gapped. System font stack only.
   ============================================================ */

:root {
  --bg: #f3f5f9;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
  --sidebar: #16202e;
  --sidebar-text: #c3cede;
  --sidebar-hover: #223046;
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --green: #16a34a;  --green-bg: #dcfce7;
  --red: #dc2626;    --red-bg: #fee2e2;
  --orange: #c77408; --orange-bg: #fef3c7;
  --blue: #0284c7;   --blue-bg: #e0f2fe;
  --gray: #6b7280;   --gray-bg: #eef1f6;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(16, 24, 40, 0.08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
}

h1 { font-size: 22px; margin: 0 0 16px; }
h2 { font-size: 16px; margin: 0 0 12px; }
h3 { font-size: 14px; margin: 0 0 8px; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
code { background: var(--gray-bg); padding: 1px 6px; border-radius: 4px; font-size: 13px; }
pre.code {
  background: #0f172a; color: #e2e8f0; padding: 14px; border-radius: var(--radius);
  overflow-x: auto; font-size: 12.5px; line-height: 1.6; margin: 0;
}

/* ---------- layout ---------- */
.app { display: flex; min-height: 100vh; }

.sidebar {
  width: 240px; flex-shrink: 0;
  background: var(--sidebar); color: var(--sidebar-text);
  position: fixed; top: 0; bottom: 0; left: 0;
  display: flex; flex-direction: column; z-index: 50;
  transition: transform 0.2s ease;
}
.brand {
  padding: 18px 20px; font-size: 18px; font-weight: 700; color: #fff;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  letter-spacing: 0.3px;
}
.brand small { display: block; font-size: 11px; font-weight: 400; color: var(--sidebar-text); }
.sidebar nav { padding: 12px; overflow-y: auto; flex: 1; }
.sidebar nav a {
  display: block; padding: 9px 12px; margin: 2px 0; border-radius: 7px;
  color: var(--sidebar-text); font-size: 14px;
}
.sidebar nav a:hover { background: var(--sidebar-hover); text-decoration: none; color: #fff; }
.sidebar nav a.active { background: var(--primary); color: #fff; font-weight: 600; }
.sidebar nav .nav-section {
  font-size: 11px; text-transform: uppercase; letter-spacing: 0.8px;
  color: #7d8ba1; padding: 14px 12px 4px;
}

.main { flex: 1; margin-left: 240px; min-width: 0; display: flex; flex-direction: column; }

.topbar {
  background: var(--card); border-bottom: 1px solid var(--border);
  padding: 12px 24px; display: flex; align-items: center; gap: 16px;
  position: sticky; top: 0; z-index: 40;
}
.topbar .company { font-weight: 700; font-size: 15px; }
.topbar .spacer { flex: 1; }
.userbox { display: flex; align-items: center; gap: 10px; }
.userbox .username { font-weight: 600; }
.menu-toggle { display: none; background: none; border: 1px solid var(--border);
  border-radius: 6px; padding: 6px 10px; font-size: 16px; cursor: pointer; }

.content { padding: 24px; max-width: 1200px; width: 100%; margin: 0 auto; }

.page-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.page-head h1 { margin: 0; }

/* ---------- cards / stats ---------- */
.card {
  background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 18px; margin-bottom: 20px;
}
.card-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.card-head h2 { margin: 0; }

.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 20px; }
.stat-card {
  background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 18px; border-left: 4px solid var(--primary);
}
.stat-card .stat-label { font-size: 12.5px; color: var(--muted); margin-bottom: 6px; }
.stat-card .stat-value { font-size: 26px; font-weight: 700; }
.stat-card.danger { border-left-color: var(--red); }
.stat-card.danger .stat-value { color: var(--red); }
.stat-card.success { border-left-color: var(--green); }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 1000px) { .grid-2 { grid-template-columns: 1fr; } }

/* ---------- tables ---------- */
.table-wrap { overflow-x: auto; }
table.table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
table.table th {
  text-align: left; padding: 10px 12px; color: var(--muted);
  font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.4px;
  border-bottom: 2px solid var(--border); white-space: nowrap;
}
table.table td { padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: middle; }
table.table tbody tr:hover { background: #f8fafc; }
table.table td.num, table.table th.num { text-align: right; white-space: nowrap; }
td.actions { white-space: nowrap; text-align: right; }
.empty { text-align: center; color: var(--muted); padding: 24px !important; }

/* ---------- badges ---------- */
.badge {
  display: inline-block; padding: 3px 10px; border-radius: 999px;
  font-size: 12px; font-weight: 600; white-space: nowrap;
}
.badge-green { background: var(--green-bg); color: #15803d; }
.badge-red   { background: var(--red-bg);   color: #b91c1c; }
.badge-orange{ background: var(--orange-bg);color: #b45309; }
.badge-blue  { background: var(--blue-bg);  color: #0369a1; }
.badge-gray  { background: var(--gray-bg);  color: #4b5563; }

/* ---------- buttons ---------- */
.btn {
  display: inline-block; padding: 8px 16px; border-radius: 7px;
  border: 1px solid var(--border); background: var(--card); color: var(--text);
  font-size: 13.5px; font-weight: 600; cursor: pointer; text-align: center;
}
.btn:hover { text-decoration: none; background: #f8fafc; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-danger { background: var(--red); border-color: var(--red); color: #fff; }
.btn-danger:hover { background: #b91c1c; }
.btn-success { background: var(--green); border-color: var(--green); color: #fff; }
.btn-sm { padding: 5px 10px; font-size: 12.5px; }
.btn-block { display: block; width: 100%; }
.btn + .btn { margin-left: 6px; }

/* ---------- forms ---------- */
.form-group { margin-bottom: 14px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 5px; font-size: 13px; }
.form-group .hint { font-size: 12px; color: var(--muted); margin-top: 4px; }
.form-group input[type="text"], .form-group input[type="password"],
.form-group input[type="number"], .form-group input[type="email"],
.form-group input[type="date"], .form-group input[type="search"],
.form-group select, .form-group textarea {
  width: 100%; padding: 9px 12px; border: 1px solid var(--border);
  border-radius: 7px; font-size: 14px; background: #fff; color: var(--text);
}
.form-group textarea { min-height: 90px; resize: vertical; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,0.12);
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 18px; }
@media (max-width: 700px) { .form-grid { grid-template-columns: 1fr; } }
.form-actions { margin-top: 18px; display: flex; gap: 10px; }

.searchbar { display: flex; gap: 8px; margin-bottom: 16px; max-width: 520px; }
.searchbar input[type="search"] {
  flex: 1; padding: 9px 12px; border: 1px solid var(--border); border-radius: 7px; font-size: 14px;
}

.inline-form { display: inline; }
.inline-form .btn { margin: 0; }

/* ---------- flash messages ---------- */
.flashes { padding: 16px 24px 0; max-width: 1200px; width: 100%; margin: 0 auto; }
.flash {
  padding: 11px 14px; border-radius: 8px; margin-bottom: 10px;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  font-size: 13.5px;
}
.flash-success { background: var(--green-bg); color: #15803d; border: 1px solid #bbf7d0; }
.flash-error   { background: var(--red-bg);   color: #b91c1c; border: 1px solid #fecaca; }
.flash-info    { background: var(--blue-bg);  color: #0369a1; border: 1px solid #bae6fd; }
.flash-warning { background: var(--orange-bg);color: #b45309; border: 1px solid #fde68a; }
.flash-close { background: none; border: none; font-size: 18px; cursor: pointer; color: inherit; line-height: 1; }

/* ---------- profile / detail ---------- */
.profile-header {
  display: flex; align-items: center; gap: 16px; margin-bottom: 20px;
  background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px;
}
.avatar {
  width: 56px; height: 56px; border-radius: 50%; background: var(--primary);
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-size: 24px; font-weight: 700; flex-shrink: 0;
}
.profile-header .who h1 { margin: 0 0 4px; }
.profile-header .who .meta { color: var(--muted); font-size: 13px; }
.profile-header .spacer { flex: 1; }
.kv { display: grid; grid-template-columns: 160px 1fr; gap: 6px 12px; font-size: 13.5px; }
.kv dt { color: var(--muted); font-weight: 600; }
.kv dd { margin: 0; }

/* ---------- invoice ---------- */
.invoice-box { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); padding: 36px; }
.kop { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 24px; }
.kop .company-name { font-size: 22px; font-weight: 800; }
.kop .doc-title { text-align: right; }
.kop .doc-title h1 { margin: 0; font-size: 28px; letter-spacing: 1px; }
.stamp {
  display: inline-block; border: 3px solid; border-radius: 8px; padding: 4px 18px;
  font-weight: 800; font-size: 18px; text-transform: uppercase; letter-spacing: 2px;
  transform: rotate(-6deg); margin: 8px 0;
}
.stamp.paid { color: var(--green); border-color: var(--green); }
.stamp.unpaid { color: var(--orange); border-color: var(--orange); }
.invoice-meta { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 24px; font-size: 13.5px; }
.invoice-total { text-align: right; font-size: 18px; font-weight: 800; margin-top: 12px; }

/* ---------- vouchers ---------- */
.voucher-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 14px; }
.voucher-card {
  border: 2px dashed #94a3b8; border-radius: 10px; padding: 14px; text-align: center; background: #fff;
}
.voucher-card .vcode { font-size: 22px; font-weight: 800; letter-spacing: 2px; margin: 8px 0; font-family: monospace; }
.voucher-card .vplan { font-weight: 600; }
.voucher-card .vprice { color: var(--primary); font-weight: 700; font-size: 16px; }

/* ---------- reports ---------- */
.bar-row { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; font-size: 13px; }
.bar-label { width: 90px; flex-shrink: 0; color: var(--muted); }
.bar-track { flex: 1; background: var(--gray-bg); border-radius: 5px; height: 20px; overflow: hidden; }
.bar-fill { height: 100%; background: var(--primary); border-radius: 5px; min-width: 2px; }
.bar-value { width: 150px; text-align: right; font-weight: 600; white-space: nowrap; }

/* ---------- login ---------- */
.login-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; padding: 20px; }
.login-card {
  background: var(--card); border-radius: 14px; box-shadow: 0 8px 30px rgba(16,24,40,0.12);
  padding: 36px; width: 100%; max-width: 380px;
}
.login-brand { font-size: 26px; font-weight: 800; text-align: center; color: var(--primary); }
.login-sub { text-align: center; color: var(--muted); margin: 4px 0 20px; }

/* ---------- error page ---------- */
.error-page { text-align: center; padding: 80px 20px; }
.error-page .code { font-size: 72px; font-weight: 800; color: var(--primary); }
.error-page .message { font-size: 18px; color: var(--muted); margin: 12px 0 24px; }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); box-shadow: 0 0 40px rgba(0,0,0,0.3); }
  .main { margin-left: 0; }
  .menu-toggle { display: inline-block; }
  .stat-grid { grid-template-columns: 1fr 1fr; }
  .content { padding: 16px; }
}
@media (max-width: 560px) {
  .stat-grid { grid-template-columns: 1fr; }
  .page-head { flex-direction: column; align-items: flex-start; gap: 10px; }
}

/* ---------- print ---------- */
@media print {
  .sidebar, .topbar, .flashes, .no-print, .menu-toggle { display: none !important; }
  .main { margin-left: 0; }
  .content { padding: 0; max-width: none; }
  body { background: #fff; font-size: 12px; }
  .card, .invoice-box { box-shadow: none; border: 1px solid #ddd; }
  a { color: inherit; }
  .voucher-grid { grid-template-columns: repeat(3, 1fr); }
  .voucher-card { break-inside: avoid; }
}

/* ============================================================
   RobRADIUS UI enhancement (v1.1) — appended, no build step.
   ============================================================ */

:root {
  --primary-50: #eff6ff;
  --primary-100: #dbeafe;
  --shadow-lg: 0 4px 14px rgba(16, 24, 40, 0.10);
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.06);
  --sidebar-active: linear-gradient(90deg, #2563eb, #1d4ed8);
}

/* ---------- sidebar brand + nav icons ---------- */
.brand {
  background: linear-gradient(135deg, #1b2942 0%, #16202e 100%);
  display: flex; align-items: center; gap: 12px;
}
.brand-mark {
  width: 38px; height: 38px; border-radius: 10px; flex-shrink: 0;
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 800; font-size: 18px;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.45);
}
.brand-text { font-size: 17px; font-weight: 700; color: #fff; line-height: 1.2; }
.brand-text small { display: block; font-size: 10.5px; font-weight: 400; color: var(--sidebar-text); }
.sidebar nav a {
  display: flex; align-items: center; gap: 11px;
  padding: 9px 12px; font-size: 13.5px;
}
.sidebar nav a svg { width: 17px; height: 17px; flex-shrink: 0; opacity: 0.75; }
.sidebar nav a.active svg { opacity: 1; }
.sidebar nav a.active { background: var(--sidebar-active); box-shadow: 0 2px 8px rgba(37,99,235,.35); }

/* ---------- topbar ---------- */
.topbar {
  background: rgba(255,255,255,0.92); backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.userbox .username { font-weight: 600; }

/* ---------- stat cards v2 ---------- */
.stat-card {
  position: relative; overflow: hidden;
  border-left: none; border-top: 3px solid var(--primary);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.stat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.stat-card.danger { border-top-color: var(--red); }
.stat-card.success { border-top-color: var(--green); }
.stat-card.warning { border-top-color: var(--orange); }
.stat-top { display: flex; align-items: center; justify-content: space-between; }
.stat-icon {
  width: 40px; height: 40px; border-radius: 10px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  background: var(--primary-50); color: var(--primary);
}
.stat-icon svg { width: 20px; height: 20px; }
.stat-card.danger .stat-icon { background: var(--red-bg); color: var(--red); }
.stat-card.success .stat-icon { background: var(--green-bg); color: var(--green); }
.stat-card.warning .stat-icon { background: var(--orange-bg); color: var(--orange); }
.stat-card .stat-value { font-size: 27px; margin-top: 8px; letter-spacing: -0.5px; }
.stat-delta { font-size: 12px; color: var(--muted); margin-top: 2px; }
.stat-delta.up { color: var(--green); font-weight: 600; }
.stat-delta.down { color: var(--red); font-weight: 600; }
.sparkline { display: block; margin-top: 8px; }

/* ---------- tables ---------- */
.table { border-collapse: separate; border-spacing: 0; width: 100%; }
.table thead th {
  background: #f8fafc; font-size: 11.5px; text-transform: uppercase;
  letter-spacing: 0.6px; color: var(--muted); font-weight: 700;
  padding: 10px 12px; border-bottom: 2px solid var(--border);
  position: sticky; top: 0; z-index: 1; white-space: nowrap;
}
.table tbody td { padding: 11px 12px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.table tbody tr:hover { background: #f8fafc; }
.table tbody tr:last-child td { border-bottom: none; }
.table .num { text-align: right; font-variant-numeric: tabular-nums; }
.table .empty { text-align: center; color: var(--muted); padding: 28px 12px; }
.table .actions { white-space: nowrap; text-align: right; }
.inline-form { display: inline-block; margin: 0 0 0 4px; }

/* ---------- badges ---------- */
.badge {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 11.5px; font-weight: 700; padding: 3px 10px; border-radius: 999px;
  letter-spacing: 0.2px; white-space: nowrap;
}
.badge .dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 6px; justify-content: center;
  font-weight: 600; border: 1px solid var(--border); background: #fff;
  border-radius: 8px; padding: 8px 16px; font-size: 13.5px; cursor: pointer;
  transition: background 0.12s ease, box-shadow 0.12s ease, transform 0.06s ease;
  box-shadow: var(--shadow-sm);
}
.btn:hover { text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: linear-gradient(180deg, #2f6fed, #1d4ed8); border-color: #1d4ed8; color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn svg { width: 15px; height: 15px; }

/* ---------- page head ---------- */
.page-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 18px; gap: 12px; flex-wrap: wrap;
}
.page-head h1 { margin: 0; font-size: 23px; letter-spacing: -0.3px; }
.page-head .sub { color: var(--muted); font-size: 13px; margin-top: 2px; }

/* ---------- RobPay card ---------- */
.robpay-card {
  border: 1px solid var(--primary-100);
  background: linear-gradient(180deg, #f8fbff 0%, #ffffff 60%);
}
.robpay-card h2 { display: flex; align-items: center; gap: 8px; }
.robpay-card h2::before {
  content: ""; width: 10px; height: 10px; border-radius: 50%;
  background: var(--green); box-shadow: 0 0 0 4px var(--green-bg);
}
.robpay-kv { grid-template-columns: 150px 1fr; row-gap: 10px; margin-top: 12px; }
.robpay-kv dd { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.amount { font-size: 24px; font-weight: 800; color: var(--primary-dark); letter-spacing: -0.5px; font-variant-numeric: tabular-nums; }
code.big { font-size: 16px; font-weight: 700; padding: 4px 10px; }
.muted { color: var(--muted); }

/* ---------- flash messages ---------- */
.flash {
  border-radius: 10px; padding: 12px 16px; font-weight: 500;
  box-shadow: var(--shadow); border-left: 4px solid var(--primary);
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
}
.flash-success { border-left-color: var(--green); background: #f0fdf4; }
.flash-error { border-left-color: var(--red); background: #fef2f2; }
.flash-warning { border-left-color: var(--orange); background: #fffbeb; }
.flash-info { border-left-color: var(--blue); background: #f0f9ff; }

/* ---------- login ---------- */
.login-page {
  background: radial-gradient(1200px 600px at 50% -10%, #dbeafe 0%, var(--bg) 60%);
}
.login-card { border-top: 4px solid var(--primary); }
.login-brand { display: flex; align-items: center; justify-content: center; gap: 10px; }

/* ---------- footer ---------- */
.app-footer {
  text-align: center; color: var(--muted); font-size: 12px; padding: 18px;
  border-top: 1px solid var(--border); margin-top: auto;
}

/* ---------- quick actions ---------- */
.quick-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 20px; }

/* ---------- search input ---------- */
.search-input {
  width: 100%; max-width: 340px; padding: 9px 14px 9px 36px;
  border: 1px solid var(--border); border-radius: 8px; font-size: 13.5px;
  background: #fff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='15' height='15' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2'%3E%3Ccircle cx='11' cy='11' r='7'/%3E%3Cpath d='m20 20-3.5-3.5'/%3E%3C/svg%3E") 12px center no-repeat;
}
.search-input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-100); }

/* ---------- responsive polish ---------- */
@media (max-width: 900px) {
  .stat-grid { grid-template-columns: 1fr 1fr; }
  .robpay-kv { grid-template-columns: 120px 1fr; }
}
@media (max-width: 560px) {
  .amount { font-size: 20px; }
  .invoice-box { padding: 20px; }
  .kop { flex-direction: column; gap: 12px; }
  .kop .doc-title { text-align: left; }
}