:root {
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f5f7fb;
  color: #172033;
  --surface: #ffffff;
  --surface-soft: #f8fafc;
  --border: #dfe5ee;
  --text: #172033;
  --muted: #697386;
  --primary: #1f5eff;
  --primary-hover: #164bd1;
  --danger: #b42318;
  --success: #067647;
  --warning: #b54708;
  --radius: 14px;
  --shadow: 0 12px 32px rgba(21, 32, 51, 0.08);
}
* { box-sizing: border-box; }
body { margin: 0; min-width: 320px; min-height: 100vh; background: #f5f7fb; }
button, input, select { font: inherit; }
button { cursor: pointer; }
.app-shell { min-height: 100vh; }
.login-page { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.login-card { width: min(100%, 420px); background: var(--surface); border: 1px solid var(--border); border-radius: 20px; box-shadow: var(--shadow); padding: 32px; }
.brand { display: flex; align-items: center; gap: 12px; margin-bottom: 28px; }
.brand-mark { width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center; background: var(--text); color: white; font-weight: 800; }
.brand h1 { font-size: 20px; margin: 0; }
.brand p { margin: 3px 0 0; color: var(--muted); font-size: 13px; }
.layout { min-height: 100vh; display: grid; grid-template-columns: 250px minmax(0, 1fr); }
.sidebar { background: #111827; color: #fff; padding: 24px 18px; position: sticky; top: 0; height: 100vh; display: flex; flex-direction: column; }
.sidebar .brand { margin-bottom: 36px; }
.sidebar .brand-mark { background: #fff; color: #111827; }
.sidebar .brand p { color: #aeb8c8; }
.nav-item { width: 100%; border: 0; background: #1f2937; color: #fff; border-radius: 10px; padding: 11px 13px; text-align: left; }
.sidebar-footer { margin-top: auto; }
.main { min-width: 0; padding: 32px; }
.page-header { display: flex; justify-content: space-between; align-items: flex-start; gap: 20px; margin-bottom: 24px; }
.page-header h2 { margin: 0; font-size: 28px; }
.page-header p { margin: 6px 0 0; color: var(--muted); }
.actions { display: flex; gap: 10px; flex-wrap: wrap; }
.button { border: 1px solid transparent; border-radius: 10px; min-height: 40px; padding: 0 14px; background: var(--primary); color: white; font-weight: 650; }
.button:hover { background: var(--primary-hover); }
.button.secondary { background: var(--surface); color: var(--text); border-color: var(--border); }
.button.secondary:hover { background: var(--surface-soft); }
.button.danger { color: var(--danger); border-color: #f0b8b3; background: #fff; }
.button.small { min-height: 34px; padding: 0 11px; font-size: 13px; }
.field { display: grid; gap: 7px; }
.field label { font-size: 13px; font-weight: 650; }
.field small { color: var(--muted); font-size: 12px; }
.field input, .field select { width: 100%; min-height: 42px; border: 1px solid var(--border); border-radius: 9px; padding: 0 11px; background: #fff; color: var(--text); outline: none; }
.field input:focus, .field select:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(31, 94, 255, 0.12); }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.form-grid .span-2 { grid-column: 1 / -1; }
.form-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 22px; }
.checkbox-row { display: flex; align-items: center; gap: 9px; min-height: 42px; }
.checkbox-row input { width: 18px; height: 18px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: 0 3px 10px rgba(21,32,51,.03); }
.summary-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin-bottom: 22px; }
.summary-card { padding: 18px; }
.summary-card strong { font-size: 26px; display: block; margin-top: 6px; }
.summary-card span { color: var(--muted); font-size: 13px; }
.table-wrap { overflow: auto; }
table { width: 100%; border-collapse: collapse; min-width: 780px; }
th, td { padding: 14px 16px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: middle; }
th { color: var(--muted); font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .03em; background: var(--surface-soft); }
tbody tr:last-child td { border-bottom: 0; }
.tenant-name { font-weight: 700; }
.tenant-meta { color: var(--muted); font-size: 12px; margin-top: 3px; }
.badge { display: inline-flex; align-items: center; gap: 6px; border-radius: 999px; padding: 5px 9px; font-size: 12px; font-weight: 700; background: #eef2f7; color: #475467; white-space: nowrap; }
.badge.success { background: #ecfdf3; color: var(--success); }
.badge.warning { background: #fffaeb; color: var(--warning); }
.badge.danger { background: #fef3f2; color: var(--danger); }
.empty { padding: 46px 24px; text-align: center; color: var(--muted); }
dialog { width: min(760px, calc(100vw - 32px)); max-height: calc(100vh - 40px); overflow: auto; border: 0; border-radius: 18px; padding: 0; box-shadow: 0 24px 80px rgba(0,0,0,.22); }
dialog::backdrop { background: rgba(15, 23, 42, .55); }
.dialog-header { padding: 22px 24px 16px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; gap: 20px; }
.dialog-header h3 { margin: 0; font-size: 20px; }
.dialog-header p { color: var(--muted); margin: 5px 0 0; font-size: 13px; }
.dialog-body { padding: 22px 24px 26px; }
.section { padding-top: 22px; margin-top: 22px; border-top: 1px solid var(--border); }
.section:first-child { border-top: 0; margin-top: 0; padding-top: 0; }
.section h4 { margin: 0 0 4px; }
.section > p { color: var(--muted); margin: 0 0 16px; font-size: 13px; }
.domain-list { display: grid; gap: 8px; margin: 12px 0; }
.domain-row { display: flex; justify-content: space-between; align-items: center; gap: 10px; padding: 10px 12px; border: 1px solid var(--border); border-radius: 10px; }
.inline-form { display: grid; grid-template-columns: 1fr auto auto; gap: 8px; align-items: end; }
.notice { padding: 12px 14px; border-radius: 10px; background: #eff6ff; color: #1d4ed8; font-size: 13px; margin-bottom: 16px; }
.error-box { padding: 12px 14px; border-radius: 10px; background: #fef3f2; color: var(--danger); font-size: 13px; margin-bottom: 16px; }
.toast-region { position: fixed; top: 18px; right: 18px; z-index: 100; display: grid; gap: 8px; }
.toast { min-width: 260px; max-width: 420px; padding: 12px 14px; border-radius: 10px; background: #101828; color: #fff; box-shadow: var(--shadow); font-size: 13px; }
.loading { display: grid; place-items: center; min-height: 50vh; color: var(--muted); }
.muted { color: var(--muted); }
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { position: static; height: auto; flex-direction: row; align-items: center; gap: 16px; padding: 14px 18px; }
  .sidebar .brand { margin: 0; flex: 1; }
  .sidebar-footer { margin: 0; }
  .nav-item { display: none; }
  .main { padding: 22px 16px; }
  .summary-grid { grid-template-columns: 1fr; }
}
@media (max-width: 620px) {
  .page-header { flex-direction: column; }
  .form-grid { grid-template-columns: 1fr; }
  .form-grid .span-2 { grid-column: auto; }
  .inline-form { grid-template-columns: 1fr; }
  dialog { width: calc(100vw - 16px); }
  .dialog-header, .dialog-body { padding-left: 16px; padding-right: 16px; }
}