:root {
  --bg: #08090b;
  --bg-elevated: #111317;
  --bg-panel: #14181d;
  --bg-soft: #1a1f26;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --text: #f5f7fa;
  --text-soft: #aab2bf;
  --text-faint: #7b8492;
  --accent: #7dd3fc;
  --accent-strong: #38bdf8;
  --success: #4ade80;
  --warning: #fbbf24;
  --danger: #f87171;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  --radius: 18px;
  --font: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top left, rgba(56, 189, 248, 0.08), transparent 28%),
    radial-gradient(circle at top right, rgba(255, 255, 255, 0.04), transparent 25%),
    linear-gradient(180deg, #090b0f 0%, #0d1116 100%);
  color: var(--text);
  font-family: var(--font);
}

body {
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

code {
  font-family: "Cascadia Code", "Consolas", monospace;
}

.shell {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 28px 18px;
  border-right: 1px solid var(--border);
  background: rgba(10, 12, 15, 0.78);
  backdrop-filter: blur(18px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 26px;
}

.brand.compact {
  margin-bottom: 20px;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-weight: 700;
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.28), rgba(255, 255, 255, 0.08));
  border: 1px solid rgba(125, 211, 252, 0.3);
  color: var(--text);
}

.brand-title {
  font-size: 17px;
  font-weight: 700;
}

.brand-subtitle {
  margin-top: 4px;
  color: var(--text-faint);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.nav {
  display: grid;
  gap: 8px;
}

.nav-link {
  padding: 12px 14px;
  border-radius: 14px;
  color: var(--text-soft);
  border: 1px solid transparent;
  transition: 0.18s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--border);
}

.main {
  padding: 28px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 18px;
  margin-bottom: 24px;
}

.topbar h1 {
  margin: 0;
  font-size: 28px;
  letter-spacing: -0.03em;
}

.topbar-subtitle {
  margin: 8px 0 0;
  color: var(--text-soft);
  line-height: 1.7;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.admin-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-soft);
}

.metrics-grid,
.two-column {
  display: grid;
  gap: 18px;
}

.metrics-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
  margin-bottom: 18px;
}

.two-column {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-bottom: 18px;
}

.two-column.align-start {
  align-items: start;
}

.metric-card,
.panel,
.subpanel,
.login-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.035), rgba(255, 255, 255, 0.02));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.metric-card {
  padding: 18px;
}

.metric-card strong {
  display: block;
  margin-top: 10px;
  font-size: 32px;
  letter-spacing: -0.04em;
}

.metric-label {
  color: var(--text-soft);
  font-size: 13px;
}

.accent-red strong {
  color: var(--danger);
}

.panel {
  padding: 20px;
}

.subpanel {
  padding: 18px;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 18px;
}

.panel-header h2,
.subpanel h3 {
  margin: 0;
  font-size: 18px;
}

.panel-header p,
.subpanel p {
  margin: 8px 0 0;
  color: var(--text-soft);
  line-height: 1.7;
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 680px;
}

th, td {
  padding: 14px 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  vertical-align: top;
  text-align: left;
}

th {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-faint);
}

td {
  font-size: 14px;
  color: var(--text);
}

.empty,
.muted {
  color: var(--text-faint);
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 12px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
}

.status-online,
.status-active,
.flash-success {
  color: var(--success);
}

.status-disabled,
.status-expired,
.flash-error {
  color: var(--danger);
}

.status-used,
.status-warning {
  color: var(--warning);
}

.flash-stack {
  display: grid;
  gap: 10px;
  margin-bottom: 18px;
}

.flash-stack.compact {
  margin-bottom: 16px;
}

.flash {
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.04);
}

.button {
  appearance: none;
  border: 1px solid var(--border-strong);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  padding: 10px 14px;
  border-radius: 12px;
  cursor: pointer;
  font: inherit;
  transition: 0.18s ease;
}

.button:hover {
  transform: translateY(-1px);
  border-color: rgba(255, 255, 255, 0.22);
}

.button.primary {
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.25), rgba(125, 211, 252, 0.1));
  border-color: rgba(125, 211, 252, 0.34);
}

.button.ghost {
  background: rgba(255, 255, 255, 0.02);
}

.button.warning {
  color: var(--warning);
}

.button.danger {
  color: var(--danger);
}

.button.tiny {
  padding: 8px 10px;
  border-radius: 10px;
  font-size: 12px;
}

.button.full {
  width: 100%;
}

.toolbar-form,
.action-row,
.secret-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.action-row {
  flex-wrap: wrap;
}

.secret-row {
  min-width: 220px;
}

.secret {
  display: inline-block;
  max-width: 360px;
  overflow-wrap: anywhere;
  color: #d7f4ff;
}

.form-grid,
.settings-grid {
  display: grid;
  gap: 16px;
}

.form-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.settings-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.field {
  display: grid;
  gap: 8px;
}

.field span {
  color: var(--text-soft);
  font-size: 13px;
}

.field input,
.field select,
.field textarea,
.toolbar-form input,
.toolbar-form select {
  width: 100%;
  padding: 12px 13px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
  font: inherit;
}

.field textarea {
  resize: vertical;
}

.span-2 {
  grid-column: span 2;
}

.login-body {
  display: grid;
  place-items: center;
  min-height: 100vh;
}

.login-shell {
  width: min(420px, calc(100vw - 28px));
}

.login-card {
  padding: 26px;
}

@media (max-width: 1160px) {
  .metrics-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 920px) {
  .shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: relative;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .metrics-grid,
  .two-column,
  .settings-grid,
  .form-grid {
    grid-template-columns: 1fr;
  }

  .span-2 {
    grid-column: auto;
  }

  .topbar {
    flex-direction: column;
  }

  .topbar-actions {
    width: 100%;
    justify-content: space-between;
  }
}