:root {
  --qr-bg: #f6f7fb;
  --qr-surface: #ffffff;
  --qr-surface-2: #f1f3f9;
  --qr-border: #e4e7f0;
  --qr-text: #131722;
  --qr-muted: #6b7280;
  --qr-primary: #4f46e5;
  --qr-primary-soft: rgba(79, 70, 229, .1);
  --qr-success: #16a34a;
  --qr-warning: #d97706;
  --qr-danger: #dc2626;
  --qr-radius: 16px;
  --qr-shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 12px 32px rgba(16, 24, 40, .06);
}

[data-theme="dark"] {
  --qr-bg: #0b0e17;
  --qr-surface: #131829;
  --qr-surface-2: #1a2036;
  --qr-border: #242c45;
  --qr-text: #e8ecf6;
  --qr-muted: #98a2b3;
  --qr-primary: #7c74ff;
  --qr-primary-soft: rgba(124, 116, 255, .16);
  --qr-shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 16px 40px rgba(0, 0, 0, .35);
}

* { -webkit-font-smoothing: antialiased; }

body {
  background: var(--qr-bg);
  color: var(--qr-text);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 15px;
  letter-spacing: -.01em;
}

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

.text-muted-2 { color: var(--qr-muted) !important; }

/* ---------------------------------------------------------------- surfaces */
.qr-card {
  background: var(--qr-surface);
  border: 1px solid var(--qr-border);
  border-radius: var(--qr-radius);
  box-shadow: var(--qr-shadow);
}

.qr-card-body { padding: 20px 22px; }

.qr-stat-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--qr-muted);
  font-weight: 600;
}

.qr-stat-value { font-size: 24px; font-weight: 700; margin-top: 6px; }
.qr-stat-hint { font-size: 13px; color: var(--qr-muted); }

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

.qr-sidebar {
  width: 258px;
  flex: 0 0 258px;
  background: var(--qr-surface);
  border-right: 1px solid var(--qr-border);
  padding: 18px 14px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.qr-main { flex: 1 1 auto; min-width: 0; }

.qr-topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--qr-surface) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--qr-border);
  padding: 12px 22px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.qr-content { padding: 22px; max-width: 1440px; }

.qr-brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 800; font-size: 18px; color: var(--qr-text);
  padding: 6px 8px 16px;
}
.qr-brand:hover { text-decoration: none; }
.qr-brand-mark {
  width: 30px; height: 30px; border-radius: 9px;
  background: linear-gradient(135deg, var(--qr-primary), #22d3ee);
  display: grid; place-items: center; color: #fff; font-size: 14px; font-weight: 800;
}

.qr-nav-title {
  font-size: 11px; text-transform: uppercase; letter-spacing: .1em;
  color: var(--qr-muted); font-weight: 700; padding: 14px 10px 6px;
}

.qr-nav-link {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 10px; border-radius: 10px;
  color: var(--qr-text); font-weight: 500; font-size: 14px;
}
.qr-nav-link:hover { background: var(--qr-surface-2); text-decoration: none; }
.qr-nav-link.active { background: var(--qr-primary-soft); color: var(--qr-primary); font-weight: 600; }

/* ------------------------------------------------------------------ tables */
.qr-table { width: 100%; border-collapse: separate; border-spacing: 0; font-size: 14px; }
.qr-table th {
  text-align: left; font-size: 12px; text-transform: uppercase; letter-spacing: .06em;
  color: var(--qr-muted); font-weight: 600; padding: 10px 14px;
  border-bottom: 1px solid var(--qr-border);
}
.qr-table td { padding: 12px 14px; border-bottom: 1px solid var(--qr-border); vertical-align: middle; }
.qr-table tbody tr:hover { background: var(--qr-surface-2); }
.qr-table-wrap { overflow-x: auto; }

/* ------------------------------------------------------------------ badges */
.qr-badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 3px 10px; border-radius: 999px;
  font-size: 12px; font-weight: 600; border: 1px solid transparent;
}
.qr-badge-success { background: rgba(22, 163, 74, .12); color: #15803d; }
.qr-badge-warning { background: rgba(217, 119, 6, .14); color: #b45309; }
.qr-badge-danger  { background: rgba(220, 38, 38, .12); color: #b91c1c; }
.qr-badge-muted   { background: var(--qr-surface-2); color: var(--qr-muted); }
.qr-badge-info    { background: var(--qr-primary-soft); color: var(--qr-primary); }

/* ------------------------------------------------------------------ inputs */
.form-control, .form-select {
  background: var(--qr-surface);
  border: 1px solid var(--qr-border);
  color: var(--qr-text);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 14px;
}
.form-control:focus, .form-select:focus {
  background: var(--qr-surface);
  color: var(--qr-text);
  border-color: var(--qr-primary);
  box-shadow: 0 0 0 4px var(--qr-primary-soft);
}
.form-label { font-size: 13px; font-weight: 600; margin-bottom: 6px; }
.form-text { color: var(--qr-muted); font-size: 12.5px; }

.btn { border-radius: 10px; font-weight: 600; font-size: 14px; padding: 9px 16px; }
.btn-primary { background: var(--qr-primary); border-color: var(--qr-primary); }
.btn-primary:hover { filter: brightness(1.06); }
.btn-soft {
  background: var(--qr-surface-2); color: var(--qr-text); border: 1px solid var(--qr-border);
}
.btn-soft:hover { background: var(--qr-border); color: var(--qr-text); }

/* ------------------------------------------------------------------- misc */
.qr-code-block {
  background: #0d1225; color: #dbe3ff; border-radius: 12px;
  padding: 16px 18px; font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 13px; line-height: 1.65; overflow-x: auto; position: relative;
}
.qr-code-block .qr-copy {
  position: absolute; top: 10px; right: 10px;
  background: rgba(255,255,255,.08); color: #dbe3ff; border: 0;
  border-radius: 8px; font-size: 12px; padding: 4px 10px;
}

.qr-empty { text-align: center; padding: 48px 20px; color: var(--qr-muted); }
.qr-empty-icon { font-size: 32px; opacity: .5; }

.qr-skeleton {
  background: linear-gradient(90deg, var(--qr-surface-2) 25%, var(--qr-border) 37%, var(--qr-surface-2) 63%);
  background-size: 400% 100%; animation: qr-shimmer 1.2s ease infinite;
  border-radius: 8px; height: 14px;
}
@keyframes qr-shimmer { 0% { background-position: 100% 50%; } 100% { background-position: 0 50%; } }

.qr-toast-stack { position: fixed; right: 18px; bottom: 18px; z-index: 1080; display: grid; gap: 10px; }
.qr-toast {
  background: var(--qr-surface); border: 1px solid var(--qr-border);
  border-left: 4px solid var(--qr-primary);
  border-radius: 12px; padding: 12px 16px; box-shadow: var(--qr-shadow);
  min-width: 260px; font-size: 14px;
}
.qr-toast.success { border-left-color: var(--qr-success); }
.qr-toast.error { border-left-color: var(--qr-danger); }

/* ------------------------------------------------------------- public site */
.qr-hero {
  padding: 92px 0 72px;
  background:
    radial-gradient(900px 420px at 80% -10%, var(--qr-primary-soft), transparent 60%),
    radial-gradient(700px 380px at 5% 0%, rgba(34, 211, 238, .12), transparent 55%);
}
.qr-hero h1 { font-size: clamp(34px, 5vw, 56px); font-weight: 800; line-height: 1.06; letter-spacing: -.03em; }
.qr-hero p.lead { color: var(--qr-muted); font-size: 18px; max-width: 620px; }

.qr-section { padding: 72px 0; }
.qr-section h2 { font-size: clamp(26px, 3vw, 36px); font-weight: 800; letter-spacing: -.02em; }

.qr-pill {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--qr-primary-soft); color: var(--qr-primary);
  border-radius: 999px; padding: 6px 14px; font-size: 13px; font-weight: 600;
}

.qr-docs-shell { display: flex; gap: 28px; align-items: flex-start; }
.qr-docs-nav { position: sticky; top: 78px; width: 240px; flex: 0 0 240px; max-height: calc(100vh - 100px); overflow-y: auto; }
.qr-docs-nav a { display: block; padding: 6px 10px; border-radius: 8px; color: var(--qr-muted); font-size: 14px; }
.qr-docs-nav a:hover, .qr-docs-nav a.active { background: var(--qr-surface-2); color: var(--qr-text); text-decoration: none; }
.qr-docs-body { flex: 1 1 auto; min-width: 0; }
.qr-docs-body h2 { margin-top: 40px; font-size: 26px; font-weight: 700; }
.qr-docs-body h3 { margin-top: 26px; font-size: 18px; font-weight: 700; }

/* --------------------------------------------------------------- checkout */
.qr-pay-wrap { min-height: 100vh; display: grid; place-items: center; padding: 28px 14px; }
.qr-pay-card { width: 100%; max-width: 460px; }
.qr-qr-frame {
  background: #fff; border-radius: 18px; padding: 16px;
  display: grid; place-items: center; border: 1px solid var(--qr-border);
}
.qr-qr-frame img { width: 100%; max-width: 300px; height: auto; image-rendering: pixelated; }
.qr-countdown { font-variant-numeric: tabular-nums; font-weight: 700; font-size: 20px; }

/* ------------------------------------------------------------- responsive */
@media (max-width: 991.98px) {
  .qr-sidebar {
    position: fixed; z-index: 1050; left: 0; top: 0; transform: translateX(-100%);
    transition: transform .2s ease;
  }
  .qr-sidebar.open { transform: translateX(0); }
  .qr-docs-shell { flex-direction: column; }
  .qr-docs-nav { position: static; width: 100%; flex: none; }
}

@media (max-width: 575.98px) {
  .qr-content { padding: 14px; }
  .qr-stat-value { font-size: 20px; }
}

.qr-backdrop {
  display: none; position: fixed; inset: 0; background: rgba(9, 12, 20, .45); z-index: 1040;
}
.qr-backdrop.show { display: block; }