:root {
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  background: #f4f7fb;
  color: #172033;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(ellipse at 12% 0%, rgba(71, 119, 220, .08), transparent 34rem),
    #f4f7fb;
}

button,
input,
select {
  font: inherit;
}

.shell {
  width: min(1080px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 24px;
}

.topbar,
.section-heading,
.status-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.topbar {
  margin-bottom: 22px;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  color: #15213a;
  font-size: clamp(1.7rem, 4vw, 2.35rem);
  letter-spacing: -.04em;
}

h2 {
  margin-bottom: 14px;
  color: #1b2942;
  font-size: 1.2rem;
}

h3 {
  font-size: 1rem;
}

.eyebrow {
  margin-bottom: 7px;
  color: #416cc4;
  font-size: .72rem;
  font-weight: 750;
  letter-spacing: .12em;
}

.panel {
  margin-bottom: 16px;
  padding: 22px;
  border: 1px solid #dce4f0;
  border-radius: 15px;
  background: #fff;
  box-shadow: 0 8px 24px rgba(22, 42, 77, .055);
}

.narrow {
  width: min(440px, 100%);
  margin: 0 auto;
}

form {
  display: grid;
  gap: 13px;
}

label {
  display: grid;
  gap: 7px;
  color: #46536a;
  font-size: .9rem;
  font-weight: 550;
}

input,
select {
  width: 100%;
  min-height: 46px;
  padding: 10px 12px;
  border: 1px solid #cbd5e3;
  border-radius: 9px;
  outline: none;
  background: #fff;
  color: #172033;
}

input:focus,
select:focus {
  border-color: #4778dd;
  box-shadow: 0 0 0 3px rgba(71, 120, 221, .15);
}

.button {
  min-height: 46px;
  padding: 10px 15px;
  border: 1px solid transparent;
  border-radius: 9px;
  cursor: pointer;
  font-weight: 700;
  transition: background-color .15s ease, border-color .15s ease, transform .15s ease;
}

.button:hover {
  filter: brightness(.97);
}

.button:active {
  transform: translateY(1px);
}

.button:focus-visible {
  outline: 3px solid rgba(71, 120, 221, .3);
  outline-offset: 2px;
}

.button.primary {
  background: #315fca;
  color: #fff;
}

.button.secondary {
  border-color: #cbd5e3;
  background: #f6f8fc;
  color: #25334c;
}

#activate-primary {
  min-height: 48px;
  padding-inline: 20px;
}

.relay-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.relay-card {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px;
  padding: 15px;
  border: 1px solid #dce4f0;
  border-radius: 12px;
  background: #fbfcff;
}

.relay-card h3,
.relay-card p {
  grid-column: 1 / -1;
  margin-bottom: 0;
}

.relay-card h3 {
  color: #25334c;
}

.relay-card p {
  min-height: 1.35em;
  font-size: .9rem;
  font-weight: 650;
}

.relay-card .button {
  width: 100%;
  padding-inline: 8px;
}

.relay-card .button.primary {
  background: #17834e;
}

.relay-card .button.secondary {
  border-color: #e0b9b9;
  background: #fff5f4;
  color: #a13333;
}

.settings-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 18px 0;
}

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

.password-form button {
  grid-column: 1 / -1;
  justify-self: start;
}

.settings-panel {
  padding-top: 14px;
}

.tab-list {
  display: flex;
  gap: 6px;
  margin: 0 0 20px;
  border-bottom: 1px solid #dce4f0;
}

.tab-button {
  position: relative;
  min-height: 44px;
  padding: 9px 14px;
  border: 0;
  border-radius: 8px 8px 0 0;
  background: transparent;
  color: #5a6880;
  cursor: pointer;
  font: inherit;
  font-weight: 650;
}

.tab-button[aria-selected="true"] {
  color: #2859bd;
}

.tab-button[aria-selected="true"]::after {
  position: absolute;
  right: 8px;
  bottom: -1px;
  left: 8px;
  height: 3px;
  border-radius: 3px 3px 0 0;
  background: #315fca;
  content: "";
}

.tab-button:focus-visible {
  outline: 3px solid rgba(71, 120, 221, .3);
  outline-offset: -3px;
}

.online {
  color: #137442;
}

.offline {
  color: #bd3535;
}

#device-status {
  margin-bottom: 0;
  font-weight: 700;
}

.status-details {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  color: #536179;
  font-size: .88rem;
}

.status-details strong {
  color: #1b2942;
}

.notice {
  margin-bottom: 16px;
  padding: 12px 15px;
  border: 1px solid #b9cbea;
  border-radius: 10px;
  background: #eff5ff;
  color: #254879;
}

.notice.error {
  border-color: #e3b9b9;
  background: #fff1f0;
  color: #992f2f;
}

.hidden {
  display: none !important;
}

footer {
  padding: 10px 2px;
  color: #68758b;
  font-size: .8rem;
}

@media (max-width: 760px) {
  .relay-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .status-panel,
  .section-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  #activate-primary {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .shell {
    width: min(100% - 22px, 1080px);
    padding-top: 20px;
  }

  .panel {
    padding: 16px;
  }

  .settings-grid,
  .password-form {
    grid-template-columns: 1fr;
  }

  .relay-grid {
    grid-template-columns: 1fr;
  }

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

  .tab-list {
    gap: 0;
  }

  .tab-button {
    flex: 1;
    padding-inline: 8px;
    font-size: .9rem;
  }

  .status-details {
    gap: 8px 14px;
  }
}