:root {
  color-scheme: light dark;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --background: #f6f7f9;
  --surface: #ffffff;
  --text: #18202a;
  --muted: #5b6573;
  --border: #8a94a3;
  --accent: #175cd3;
  --accent-text: #ffffff;
  --focus: #f59e0b;
  --success: #18794e;
  --warning: #9a6700;
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #11151b;
    --surface: #1b222c;
    --text: #f2f4f7;
    --muted: #c2c8d0;
    --border: #778291;
    --accent: #84adff;
    --accent-text: #101828;
    --focus: #fdb022;
    --success: #75d6a7;
    --warning: #f5c451;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  background: var(--background);
  color: var(--text);
}

body {
  min-height: 100vh;
  margin: 0;
  display: grid;
  place-items: center;
  padding: 1rem;
  background: var(--background);
  color: var(--text);
  line-height: 1.5;
}

main {
  width: min(100%, 40rem);
}

h1 {
  margin-block: 0 1.5rem;
  font-size: clamp(1.75rem, 7vw, 2.5rem);
  line-height: 1.15;
}

form {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
}

form[action="/login"] {
  max-width: 26rem;
  margin-inline: auto;
  padding: clamp(1rem, 5vw, 2rem);
  border: 1px solid var(--border);
  border-radius: .75rem;
  background: var(--surface);
}

form div {
  display: grid;
  gap: .375rem;
}

label {
  font-weight: 650;
}

input,
button {
  min-height: 2.75rem;
  font: inherit;
  border-radius: .375rem;
}

input {
  width: 100%;
  padding: .625rem .75rem;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
}

button {
  padding: .625rem 1rem;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--accent-text);
  font-weight: 700;
  cursor: pointer;
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

#login-status:empty {
  display: none;
}

@media (min-width: 40rem) {
  body {
    padding: 2rem;
  }
}

.skip-link {
  position: fixed;
  z-index: 10;
  top: .5rem;
  left: .5rem;
  padding: .75rem 1rem;
  transform: translateY(-200%);
  border-radius: .375rem;
  background: var(--accent);
  color: var(--accent-text);
  font-weight: 700;
}

.skip-link:focus {
  transform: translateY(0);
}

.app-shell {
  min-width: 0;
  display: flex;
  flex-direction: column;
  place-items: initial;
  padding: 0;
}

.site-header,
.site-footer {
  width: 100%;
  border-color: var(--border);
  background: var(--surface);
}

.site-header {
  border-bottom: 1px solid var(--border);
}

.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--border);
}

.header-inner,
.footer-inner,
.app-shell main {
  width: min(100%, 72rem);
  margin-inline: auto;
  padding: 1rem;
}

.header-inner {
  display: grid;
  gap: 1rem;
}

.brand {
  font-size: 1.125rem;
  font-weight: 800;
}

.primary-nav {
  display: flex;
  flex-wrap: wrap;
  gap: .375rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-item {
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
  padding: .625rem .75rem;
  border-radius: .375rem;
  font-weight: 650;
}

.nav-current {
  background: var(--accent);
  color: var(--accent-text);
}

.nav-disabled {
  color: var(--muted);
  cursor: not-allowed;
}

.app-shell main {
  padding-block: clamp(1.5rem, 5vw, 3rem);
}

.page-heading {
  max-width: 44rem;
  margin-bottom: 2rem;
}

.page-heading h1,
.app-shell h2,
.app-shell h3,
.page-heading p,
.card p,
.connectivity-card p,
.site-footer p {
  margin-top: 0;
}

.eyebrow {
  margin-bottom: .25rem;
  color: var(--accent);
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.app-shell section + section {
  margin-top: 2rem;
}

.card-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 14rem), 1fr));
}

.card,
.connectivity-card {
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: .75rem;
  background: var(--surface);
}

.status {
  margin-bottom: 0;
  padding-left: .875rem;
  border-left: .25rem solid var(--border);
}

.status-online {
  border-color: var(--success);
}

.status-offline {
  border-color: var(--warning);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-footer p,
.site-footer form {
  margin: 0;
}

@media (min-width: 48rem) {
  .header-inner {
    grid-template-columns: auto 1fr;
    align-items: center;
  }

  .primary-nav {
    justify-content: flex-end;
  }

  .header-inner,
  .footer-inner,
  .app-shell main {
    padding-inline: 2rem;
  }
}