:root {
  --bg: #0f172a;
  --panel: #111827;
  --accent: #38bdf8;
  --muted: #94a3b8;
  --text: #e2e8f0;
  --success: #34d399;
  --danger: #f87171;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  font-family: "Inter", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: radial-gradient(circle at 20% 20%, #1f2937, #0b1224 45%), linear-gradient(120deg, #0b1224, #0f172a 60%);
  color: var(--text);
  min-height: 100vh;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 240px;
  background: rgba(17, 24, 39, 0.75);
  backdrop-filter: blur(8px);
  padding: 24px;
  border-right: 1px solid rgba(255, 255, 255, 0.04);
}

.brand {
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.4px;
}

.nav {
  margin-top: 24px;
  display: grid;
  gap: 12px;
}

.nav a {
  display: block;
  padding: 10px 12px;
  border-radius: 10px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.02);
}

.nav a.active,
.nav a:hover {
  background: rgba(56, 189, 248, 0.12);
  color: #ecfeff;
}

.content {
  flex: 1;
  padding: 32px;
}

.card {
  background: rgba(17, 24, 39, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 14px;
  padding: 20px;
  box-shadow: var(--shadow);
}

.grid {
  display: grid;
  gap: 16px;
}

.grid.cols-2 {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.metric {
  display: grid;
  gap: 4px;
}

.metric .value {
  font-size: 32px;
  font-weight: 700;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 12px 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

th {
  text-align: left;
  color: var(--muted);
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.6px;
}

tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

form {
  display: grid;
  gap: 16px;
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 14px;
}

input[type="text"],
input[type="email"],
input[type="password"] {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  padding: 12px;
  color: var(--text);
}

input[type="checkbox"] {
  transform: scale(1.1);
}

.actions {
  display: flex;
  gap: 12px;
  height: 100%;
  align-items: center;
}

.img-avatar {
  width: 48px;
  height: 48px;
  border-radius: 8px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 16px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  font-weight: 600;
  letter-spacing: 0.2px;
}

.btn.primary {
  background: linear-gradient(135deg, #38bdf8, #0ea5e9);
  color: #0b1224;
}

.btn.secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
}

.btn.danger {
  background: linear-gradient(135deg, #f87171, #ef4444);
  color: #0b1224;
}

.pill {
  display: inline-block;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 12px;
  background: rgba(56, 189, 248, 0.12);
  color: #e0f2fe;
}

.pill.inactive {
  background: rgba(248, 113, 113, 0.15);
  color: #fee2e2;
}

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

.login-page {
  display: grid;
  place-items: center;
  min-height: 100vh;
  padding: 32px;
}

.login-card {
  width: 420px;
  max-width: 90vw;
}

@media (max-width: 960px) {
  .layout {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
  .nav {
    grid-auto-flow: column;
    grid-auto-columns: 1fr;
  }
}