/* VND Bridge — GateNOC Theme2-inspired admin UI */
:root {
  --gn-primary-50: #F0FDF4;
  --gn-primary-100: #DCFCE7;
  --gn-primary-200: #BBF7D0;
  --gn-primary: #16A34A;
  --gn-primary-hover: #15803D;
  --gn-primary-active: #166534;

  --gn-slate-50: #F8FAFC;
  --gn-slate-100: #F1F5F9;
  --gn-slate-200: #E2E8F0;
  --gn-slate-300: #CBD5E1;
  --gn-slate-400: #94A3B8;
  --gn-slate-500: #64748B;
  --gn-slate-600: #475569;
  --gn-slate-700: #334155;
  --gn-slate-800: #1E293B;
  --gn-slate-900: #0F172A;

  --gn-success: #16A34A;
  --gn-warning: #F59E0B;
  --gn-danger: #DC2626;
  --gn-info: #2563EB;

  --gn-bg: #F8FAFC;
  --gn-surface: #FFFFFF;
  --gn-border: #E2E8F0;
  --gn-border-strong: #CBD5E1;
  --gn-text: #0F172A;
  --gn-text-secondary: #475569;
  --gn-text-muted: #64748B;

  --gn-radius-btn: 10px;
  --gn-radius-input: 10px;
  --gn-radius-card: 16px;
  --gn-radius-sm: 10px;
  --gn-radius-pill: 999px;

  --gn-shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --gn-shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);

  --gn-sidebar-width: 256px;
  --gn-topbar-height: 56px;
  --gn-font: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, sans-serif;
  --gn-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: var(--gn-font);
  color: var(--gn-text);
  background: var(--gn-bg);
  font-size: 14px;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--gn-primary); text-decoration: none; }
a:hover { color: var(--gn-primary-hover); }

.mono { font-family: var(--gn-mono); font-size: 12px; word-break: break-all; }
.tabular { font-variant-numeric: tabular-nums; }
.muted { color: var(--gn-text-muted); }
.hidden { display: none !important; }

/* —— Shell —— */
.gn-app { min-height: 100%; }
.gn-shell {
  display: grid;
  grid-template-columns: var(--gn-sidebar-width) 1fr;
  min-height: 100vh;
}
.gn-sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  background: #fff;
  border-right: 1px solid var(--gn-border);
  display: flex;
  flex-direction: column;
  padding: 16px 12px;
  z-index: 20;
}
.gn-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px 18px;
}
.gn-brand__mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(145deg, #22C55E, #16A34A);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 12px;
  letter-spacing: -0.02em;
  box-shadow: var(--gn-shadow-sm);
}
.gn-brand__text { font-weight: 700; font-size: 15px; letter-spacing: -0.02em; color: var(--gn-slate-900); }
.gn-brand__sub { display: block; font-size: 11px; font-weight: 500; color: var(--gn-text-muted); margin-top: 1px; }

.gn-nav { display: flex; flex-direction: column; gap: 4px; flex: 1; }
.gn-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 8px;
  color: var(--gn-slate-700);
  font-weight: 600;
  font-size: 13.5px;
  border-left: 3px solid transparent;
  transition: background 120ms ease-out, color 120ms ease-out;
}
.gn-nav a:hover { background: var(--gn-slate-50); color: var(--gn-slate-900); text-decoration: none; }
.gn-nav a.is-active {
  background: var(--gn-primary-50);
  color: var(--gn-primary-active);
  border-left-color: var(--gn-primary);
}
.gn-nav svg { width: 18px; height: 18px; opacity: 0.85; flex-shrink: 0; }
.gn-sidebar__foot {
  border-top: 1px solid var(--gn-border);
  padding-top: 12px;
  margin-top: 12px;
}
.gn-user {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 4px 4px 0;
}
.gn-user__name { font-weight: 600; font-size: 13px; color: var(--gn-slate-800); }

.gn-main { min-width: 0; display: flex; flex-direction: column; }
.gn-topbar {
  height: var(--gn-topbar-height);
  background: rgba(255,255,255,0.96);
  border-bottom: 1px solid var(--gn-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(8px);
}
.gn-topbar__title { font-weight: 700; font-size: 15px; letter-spacing: -0.02em; }
.gn-topbar__actions { display: flex; align-items: center; gap: 8px; }
.gn-content { padding: 20px 24px 40px; max-width: 1400px; width: 100%; }

/* —— Buttons —— */
.gn-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 1px solid transparent;
  border-radius: var(--gn-radius-btn);
  padding: 9px 14px;
  font: inherit;
  font-weight: 600;
  font-size: 13.5px;
  cursor: pointer;
  transition: background 120ms ease-out, border-color 120ms ease-out, transform 120ms ease-out;
  text-decoration: none !important;
}
.gn-btn--sm { padding: 7px 11px; font-size: 12.5px; }
.gn-btn--primary { background: var(--gn-primary); color: #fff; }
.gn-btn--primary:hover { background: var(--gn-primary-hover); color: #fff; transform: translateY(-1px); }
.gn-btn--secondary { background: #fff; color: var(--gn-slate-800); border-color: var(--gn-border-strong); }
.gn-btn--secondary:hover { background: var(--gn-slate-50); color: var(--gn-slate-900); }
.gn-btn--ghost { background: transparent; color: var(--gn-slate-700); border-color: transparent; }
.gn-btn--ghost:hover { background: var(--gn-slate-100); color: var(--gn-slate-900); }
.gn-btn--danger { background: #FEF2F2; color: #B91C1C; border-color: #FECACA; }

/* —— Forms —— */
.gn-label { display: block; font-weight: 600; font-size: 12.5px; color: var(--gn-slate-700); margin: 0 0 6px; }
.gn-input, .gn-select, .gn-textarea {
  width: 100%;
  border: 1px solid var(--gn-border-strong);
  border-radius: var(--gn-radius-input);
  padding: 9px 12px;
  font: inherit;
  background: #fff;
  color: var(--gn-text);
  transition: border-color 120ms ease-out, box-shadow 120ms ease-out;
}
.gn-input:focus, .gn-select:focus, .gn-textarea:focus {
  outline: none;
  border-color: var(--gn-primary);
  box-shadow: 0 0 0 4px rgba(22, 163, 74, 0.15);
}
.gn-field { margin-bottom: 14px; }
.gn-row { display: flex; flex-wrap: wrap; gap: 12px; }
.gn-row .gn-field { flex: 1; min-width: 160px; }

/* —— Cards / page —— */
.gn-page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}
.gn-page-header h1 {
  margin: 0;
  font-size: 22px;
  letter-spacing: -0.03em;
  font-weight: 700;
}
.gn-page-header p { margin: 4px 0 0; color: var(--gn-text-muted); font-size: 13.5px; }

.gn-card {
  background: var(--gn-surface);
  border: 1px solid var(--gn-border);
  border-radius: 12px;
  box-shadow: var(--gn-shadow-sm);
}
.gn-card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--gn-border);
}
.gn-card__title { margin: 0; font-size: 14px; font-weight: 700; letter-spacing: -0.01em; }
.gn-card__body { padding: 16px; }

/* —— KPIs —— */
.gn-kpi-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}
.gn-kpi {
  background: #fff;
  border: 1px solid var(--gn-border);
  border-radius: 12px;
  padding: 14px 16px;
  min-height: 96px;
  box-shadow: var(--gn-shadow-sm);
}
.gn-kpi__label {
  display: block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--gn-text-muted);
  margin-bottom: 8px;
}
.gn-kpi__value {
  display: block;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--gn-slate-900);
  font-variant-numeric: tabular-nums;
}
.gn-kpi__hint { display: block; margin-top: 6px; font-size: 12px; color: var(--gn-text-muted); }
.gn-kpi--accent .gn-kpi__value { color: var(--gn-primary); }

/* —— Period chips —— */
.gn-period { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0 0; }
.gn-period__chip {
  display: inline-flex;
  align-items: center;
  padding: 7px 12px;
  border-radius: var(--gn-radius-pill);
  border: 1px solid var(--gn-border);
  background: var(--gn-slate-50);
  color: var(--gn-slate-700);
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  margin: 0;
}
.gn-period__chip input { display: none; }
.gn-period__chip.is-active,
.gn-period__chip:has(input:checked) {
  background: var(--gn-primary-50);
  border-color: var(--gn-primary-200);
  color: var(--gn-primary-active);
}

/* —— Tabs —— */
.gn-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
}
.gn-tab {
  padding: 8px 12px;
  border-radius: var(--gn-radius-pill);
  border: 1px solid var(--gn-border);
  background: #fff;
  color: var(--gn-slate-600);
  font-weight: 600;
  font-size: 12.5px;
  text-decoration: none !important;
}
.gn-tab:hover { background: var(--gn-slate-50); color: var(--gn-slate-900); }
.gn-tab.is-active {
  background: #EFF6FF;
  border-color: #BFDBFE;
  color: #1D4ED8;
}

/* —— Filters —— */
.gn-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: end;
  margin-bottom: 14px;
  padding: 14px;
  background: #fff;
  border: 1px solid var(--gn-border);
  border-radius: 12px;
}
.gn-filters .gn-field { margin: 0; min-width: 140px; }

/* —— Table —— */
.gn-table-wrap { overflow: auto; }
.gn-table { width: 100%; border-collapse: collapse; }
.gn-table th {
  text-align: left;
  padding: 10px 12px;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--gn-text-muted);
  background: var(--gn-slate-50);
  border-bottom: 1px solid var(--gn-border);
  white-space: nowrap;
}
.gn-table td {
  padding: 11px 12px;
  border-bottom: 1px solid var(--gn-border);
  vertical-align: middle;
  height: 46px;
}
.gn-table tr:hover td { background: var(--gn-slate-50); }
.gn-table tr:last-child td { border-bottom: 0; }

/* —— Status —— */
.gn-status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-weight: 600;
  font-size: 12.5px;
  color: var(--gn-slate-700);
}
.gn-status__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gn-slate-400);
}
.gn-status--paid .gn-status__dot,
.gn-status--success .gn-status__dot { background: var(--gn-success); }
.gn-status--paid, .gn-status--success { color: #15803D; }
.gn-status--pending .gn-status__dot { background: var(--gn-warning); }
.gn-status--pending { color: #B45309; }
.gn-status--expired .gn-status__dot { background: var(--gn-slate-400); }
.gn-status--failed .gn-status__dot,
.gn-status--danger .gn-status__dot { background: var(--gn-danger); }
.gn-status--failed, .gn-status--danger { color: #B91C1C; }

.gn-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  border-radius: var(--gn-radius-pill);
  font-size: 11.5px;
  font-weight: 700;
}
.gn-badge--success { background: var(--gn-primary-100); color: #15803D; }
.gn-badge--warning { background: #FEF3C7; color: #B45309; }
.gn-badge--neutral { background: var(--gn-slate-100); color: var(--gn-slate-600); }
.gn-badge--danger { background: #FEE2E2; color: #B91C1C; }

/* —— Alerts —— */
.gn-alert {
  padding: 12px 14px;
  border-radius: 10px;
  margin-bottom: 14px;
  border: 1px solid var(--gn-border);
  font-size: 13.5px;
}
.gn-alert--success { background: var(--gn-primary-50); border-color: var(--gn-primary-200); color: #166534; }
.gn-alert--error { background: #FEF2F2; border-color: #FECACA; color: #991B1B; }
.gn-alert--info { background: #EFF6FF; border-color: #BFDBFE; color: #1E40AF; }

.gn-empty {
  text-align: center;
  padding: 36px 16px;
  color: var(--gn-text-muted);
}

/* —— Detail grid —— */
.gn-detail-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.9fr;
  gap: 16px;
}
.gn-dl { display: grid; grid-template-columns: 140px 1fr; gap: 10px 12px; margin: 0; }
.gn-dl dt { color: var(--gn-text-muted); font-weight: 600; font-size: 12.5px; }
.gn-dl dd { margin: 0; font-weight: 500; }
.gn-qr {
  text-align: center;
  padding: 16px;
  border: 1px dashed var(--gn-border-strong);
  border-radius: 12px;
  background: linear-gradient(180deg, #fff, #F8FAFC);
}
.gn-qr img { width: min(280px, 100%); border-radius: 8px; }

/* —— Login / pay —— */
.gn-auth {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    radial-gradient(900px 420px at 12% -10%, #DCFCE7 0%, transparent 55%),
    radial-gradient(800px 380px at 100% 0%, #DBEAFE 0%, transparent 50%),
    var(--gn-bg);
}
.gn-auth__card {
  width: min(420px, 100%);
  background: #fff;
  border: 1px solid var(--gn-border);
  border-radius: 16px;
  box-shadow: var(--gn-shadow-md);
  padding: 28px;
}
.gn-pay {
  max-width: 480px;
  margin: 40px auto;
  padding: 0 16px 48px;
}
.gn-pay .gn-card { border-radius: 16px; overflow: hidden; }
.gn-pay__amount {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin: 8px 0 12px;
  font-variant-numeric: tabular-nums;
}
.gn-memo {
  margin-top: 12px;
  padding: 12px 14px;
  background: #FFFBEB;
  border: 1px dashed #F59E0B;
  border-radius: 10px;
  font-weight: 700;
  font-family: var(--gn-mono);
  font-size: 13px;
}

.gn-code {
  background: var(--gn-slate-50);
  border: 1px solid var(--gn-border);
  border-radius: 10px;
  padding: 12px;
  font-family: var(--gn-mono);
  font-size: 12px;
  white-space: pre-wrap;
  overflow: auto;
}

/* —— Docs —— */
.docs-section { margin-bottom: 14px; scroll-margin-top: 72px; }
.docs-toc { margin-bottom: 16px; }
.docs-prose p { margin: 0 0 12px; color: var(--gn-slate-700); line-height: 1.55; }
.docs-prose ol, .docs-prose ul { margin: 0 0 12px; padding-left: 1.25rem; color: var(--gn-slate-700); line-height: 1.55; }
.docs-prose h3 { margin: 18px 0 8px; font-size: 14px; }
.docs-prose .gn-table { margin: 12px 0; }
.docs-prose code {
  font-family: var(--gn-mono);
  font-size: 12px;
  background: var(--gn-slate-100);
  padding: 1px 6px;
  border-radius: 6px;
}
.docs-prose .gn-code { margin: 10px 0 14px; }

@media (max-width: 920px) {
  .gn-shell { grid-template-columns: 1fr; }
  .gn-sidebar {
    position: relative;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--gn-border);
  }
  .gn-nav { flex-direction: row; flex-wrap: wrap; }
  .gn-nav a { border-left: 0; border-bottom: 2px solid transparent; }
  .gn-nav a.is-active { border-bottom-color: var(--gn-primary); }
  .gn-detail-grid { grid-template-columns: 1fr; }
  .gn-content { padding: 16px; }
  .gn-dl { grid-template-columns: 1fr; gap: 4px; }
}