* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, sans-serif;
  background: #f4f6f8;
  color: #1f2933;
}

header {
  background: #229ed9;
  color: #fff;
  padding: 24px 32px;
}

header h1 {
  margin: 0 0 8px;
  font-size: 24px;
}

header p {
  margin: 0;
  opacity: 0.9;
}

.nav {
  margin-top: 16px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}

.nav button,
.nav a {
  color: #fff;
  text-decoration: none;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.15);
  font-size: 14px;
  border: 0;
  cursor: pointer;
  font-family: inherit;
}

.nav button.active,
.nav button:hover,
.nav a:hover {
  background: rgba(255, 255, 255, 0.3);
}

.nav .spacer {
  flex: 1;
}

main {
  max-width: 1100px;
  margin: 24px auto;
  padding: 0 16px 32px;
}

.card {
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
  padding: 24px;
  margin-bottom: 24px;
}

.card h2 {
  margin: 0 0 8px;
  font-size: 18px;
}

.help {
  margin: 0 0 16px;
  color: #52606d;
  font-size: 14px;
}

label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 6px;
}

input,
select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #cbd2d9;
  border-radius: 8px;
  font-size: 15px;
  font-family: inherit;
  background: #fff;
}

input:focus,
select:focus {
  outline: 2px solid #229ed9;
  border-color: #229ed9;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 16px;
}

button.primary,
button.secondary,
button.danger,
button.ghost {
  border: 0;
  border-radius: 8px;
  padding: 10px 16px;
  font-size: 14px;
  cursor: pointer;
  font-family: inherit;
}

button.primary {
  background: #229ed9;
  color: #fff;
}

button.primary:hover {
  background: #1b8fc6;
}

button.secondary {
  background: #e4e7eb;
  color: #1f2933;
}

button.danger {
  background: #c53030;
  color: #fff;
}

button.ghost {
  background: transparent;
  color: #52606d;
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

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

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

th,
td {
  text-align: left;
  padding: 10px 8px;
  border-bottom: 1px solid #e4e7eb;
  vertical-align: top;
}

th {
  color: #52606d;
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
}

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}

.badge.ok {
  background: #d1fae5;
  color: #065f46;
}

.badge.off {
  background: #fee2e2;
  color: #991b1b;
}

.muted {
  color: #7b8794;
  font-size: 13px;
}

header .muted {
  color: rgba(255, 255, 255, 0.85);
}

.check-row label {
  display: inline;
  margin: 0;
  font-weight: 500;
}

body.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

body.login-page main {
  margin: 0;
  width: min(420px, calc(100% - 32px));
}

.error {
  color: #b42318;
  font-size: 14px;
  min-height: 20px;
  margin-top: 8px;
}

.ok-msg {
  color: #065f46;
  font-size: 14px;
  margin-top: 8px;
}

.hidden {
  display: none;
}

.check-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 18px;
}

.check-row input {
  width: auto;
}

@media (max-width: 720px) {
  header {
    padding: 20px 16px;
  }

  .grid,
  .grid-3 {
    grid-template-columns: 1fr;
  }
}