:root {
  --bg: #0f172a;
  --panel: #111827;
  --soft: #1f2937;
  --soft-2: #0b1220;
  --border: #334155;
  --text: #e5e7eb;
  --muted: #94a3b8;
  --primary: #22c55e;
  --primary-dark: #052e16;
  --danger: #ef4444;
  --warning: #f59e0b;
  --shadow: 0 20px 50px rgba(2, 6, 23, 0.35);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: Inter, Arial, sans-serif; background: var(--bg); color: var(--text); }
body.modal-open, body.sidebar-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
code { background: rgba(148, 163, 184, 0.15); padding: 2px 6px; border-radius: 8px; }
.small { font-size: 13px; }
.w-full { width: 100%; }
.mt-16 { margin-top: 16px; }
.compact-gap { gap: 8px; }
.wrap-mobile { flex-wrap: wrap; }

.shell { display: grid; grid-template-columns: 300px 1fr; min-height: 100vh; }
.sidebar {
  background: #020617;
  padding: 24px;
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 20px;
  position: sticky;
  top: 0;
  min-height: 100vh;
}
.sidebar-title {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--muted);
  margin-bottom: 10px;
}
.nav { display: flex; flex-direction: column; gap: 8px; }
.nav a {
  padding: 12px 14px;
  border-radius: 12px;
  color: var(--muted);
  transition: 0.2s ease;
  border: 1px solid transparent;
}
.nav a.active, .nav a:hover { background: var(--soft); color: var(--text); border-color: var(--border); }
.content { padding: 24px; min-width: 0; }
.page-header { margin-bottom: 16px; }
.header-main { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.header-main h2 { margin: 0; }
.menu-toggle {
  display: none;
  background: var(--soft);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 12px;
  padding: 10px 12px;
  margin-bottom: 12px;
}
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 20px;
  box-shadow: var(--shadow);
}
.card.soft { background: linear-gradient(180deg, rgba(31, 41, 55, 0.95), rgba(17, 24, 39, 0.95)); }
.workflow-card { margin-bottom: 16px; }
.section-card { margin-bottom: 16px; }
.grid { display: grid; gap: 16px; }
.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.compact-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.stat small { display: block; color: var(--muted); margin-bottom: 12px; }
.stat strong { font-size: 36px; }
.toolbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.toolbar.end { justify-content: flex-end; }
.form { display: grid; gap: 16px; }
.form label, .form fieldset { display: grid; gap: 8px; color: var(--text); }
.form input, .form textarea, .form select, .btn {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: #020617;
  color: var(--text);
  padding: 12px 14px;
  font: inherit;
}
.form textarea { resize: vertical; }
.form .inline { display: flex; align-items: center; gap: 10px; }
.form .inline input { width: auto; padding: 0; }
fieldset { border: 1px solid var(--border); border-radius: 16px; padding: 16px; }
legend { color: var(--muted); padding: 0 8px; }
.btn { cursor: pointer; display: inline-flex; align-items: center; justify-content: center; gap: 8px; }
.btn.primary { background: var(--primary); color: #052e16; border-color: transparent; font-weight: 700; }
.btn.danger { background: var(--danger); border-color: transparent; color: white; }
.btn.ghost { background: transparent; }
.table-wrap { overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { text-align: left; padding: 14px 12px; border-bottom: 1px solid var(--border); vertical-align: top; }
.table.compact td { padding: 10px 0; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.15);
  color: var(--text);
  font-size: 12px;
  font-weight: 700;
}
.badge.success { background: rgba(34, 197, 94, 0.15); color: #86efac; }
.badge.danger { background: rgba(239, 68, 68, 0.15); color: #fca5a5; }
.badge.warning { background: rgba(245, 158, 11, 0.15); color: #fcd34d; }
.status-box { margin-top: auto; padding: 16px; border: 1px solid var(--border); border-radius: 16px; background: var(--panel); }
.muted { color: var(--muted); }
.list { margin: 0; padding-left: 18px; display: grid; gap: 8px; }
.list.ordered { padding-left: 22px; }
.pre { white-space: pre-wrap; background: #020617; border: 1px solid var(--border); padding: 12px; border-radius: 12px; }
.gateway-card { min-height: 240px; }
.gateway-qr { max-width: 280px; width: 100%; border-radius: 16px; margin-top: 12px; background: white; padding: 12px; }
.guide-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.guide-item, .guide-example, .info-item { border: 1px solid var(--border); background: var(--soft-2); border-radius: 16px; padding: 16px; }
.guide-item h4, .guide-example h4 { margin-top: 0; margin-bottom: 8px; }
.info-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.info-item strong { display: block; margin-bottom: 6px; }
.alert { padding: 14px 16px; border-radius: 14px; border: 1px solid var(--border); }
.alert.danger { background: rgba(239, 68, 68, 0.12); color: #fecaca; border-color: rgba(239, 68, 68, 0.3); }
.auth-body { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.auth-shell { width: 100%; max-width: 960px; }
.auth-card { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 20px; align-items: stretch; }
.auth-copy, .auth-form { min-height: 100%; }
.auth-copy { padding: 28px; border: 1px solid var(--border); border-radius: 24px; background: linear-gradient(180deg, rgba(2,6,23,0.98), rgba(17,24,39,0.98)); }
.auth-copy h1 { margin-bottom: 12px; }
.auth-form { align-self: stretch; }
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(2, 6, 23, 0.72);
  display: grid;
  place-items: center;
  padding: 20px;
  z-index: 1000;
}
.modal-card {
  width: min(100%, 460px);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 22px;
  box-shadow: var(--shadow);
}
.modal-card h3 { margin-top: 0; }
.modal-actions { margin-top: 16px; }

@media (max-width: 1200px) {
  .cols-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .guide-grid, .compact-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 980px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: min(88vw, 340px);
    z-index: 999;
    transform: translateX(-100%);
    transition: transform 0.2s ease;
    min-height: 100vh;
  }
  .sidebar.open { transform: translateX(0); }
  .content { padding: 16px; }
  .menu-toggle { display: inline-flex; }
  .cols-2, .cols-4, .guide-grid, .compact-grid, .info-grid, .auth-card { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  .mobile-stacked-table thead { display: none; }
  .mobile-stacked-table tbody, .mobile-stacked-table tr, .mobile-stacked-table td { display: block; width: 100%; }
  .mobile-stacked-table tr { border-bottom: 1px solid var(--border); padding: 10px 0; }
  .mobile-stacked-table td { border-bottom: none; padding: 8px 0; }
  .mobile-stacked-table td::before {
    content: attr(data-label);
    display: block;
    color: var(--muted);
    font-size: 12px;
    margin-bottom: 4px;
  }
  .actions { flex-direction: column; align-items: stretch; }
  .toolbar, .toolbar.end { justify-content: flex-start; }
  .card { padding: 16px; border-radius: 18px; }
}