:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --panel: #ffffff;
  --text: #1d2433;
  --muted: #667085;
  --line: #d8dee9;
  --primary: #1d6fd6;
  --primary-dark: #1557aa;
  --accent: #188064;
  --danger: #b42318;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 14px;
  letter-spacing: 0;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 24px;
  background: #101828;
  color: #ffffff;
  border-bottom: 1px solid #344054;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: 22px;
  font-weight: 700;
}

h2 {
  margin-bottom: 12px;
  font-size: 16px;
}

.topbar p {
  margin-top: 4px;
  color: #cbd5e1;
}

.gateway-box {
  display: grid;
  gap: 6px;
  min-width: 260px;
}

.toast {
  position: fixed;
  top: 88px;
  right: 18px;
  z-index: 10;
  display: none;
  max-width: min(420px, calc(100vw - 36px));
  padding: 12px 14px;
  border-radius: 8px;
  background: #1557aa;
  color: #ffffff;
  box-shadow: 0 10px 24px rgba(16, 24, 40, 0.24);
  font-weight: 700;
  line-height: 1.4;
}

.toast.show {
  display: block;
}

.toast.success {
  background: var(--accent);
}

.toast.error {
  background: var(--danger);
  color: #ffffff !important;
}

.layout {
  display: grid;
  grid-template-columns: repeat(3, minmax(260px, 1fr));
  gap: 16px;
  padding: 16px;
}

.panel {
  min-width: 0;
  padding: 16px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.05);
}

.wide {
  grid-column: span 3;
}

.grid {
  display: grid;
  gap: 10px;
}

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

.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

label {
  display: grid;
  gap: 5px;
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

input,
select,
textarea {
  width: 100%;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 9px 10px;
  color: var(--text);
  background: #ffffff;
  font: inherit;
}

input::placeholder,
textarea::placeholder {
  color: #98a2b3;
}

textarea {
  min-height: 96px;
  resize: vertical;
  font-family: Consolas, Monaco, monospace;
  font-size: 13px;
  text-transform: none;
}

button {
  min-height: 38px;
  border: 0;
  border-radius: 6px;
  padding: 0 14px;
  background: var(--primary);
  color: #ffffff;
  font-weight: 700;
  cursor: pointer;
}

button:hover {
  background: var(--primary-dark);
}

button.danger-button,
button.danger-button:hover {
  background: var(--danger);
}

.actions,
.segmented {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
  margin-bottom: 10px;
}

.firmware-version {
  min-height: 20px;
  padding-top: 2px;
  color: var(--muted);
  font-size: 12px;
  overflow-wrap: anywhere;
}

.segmented button {
  flex: 1 1 90px;
}

.panel h3 {
  margin: 14px 0 8px;
  color: var(--text);
  font-size: 14px;
}

.panel-status {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #f8fafc;
}

.panel-status.empty {
  padding: 10px;
  color: var(--muted);
  font-size: 13px;
}

.panel-status-meta {
  padding: 8px 10px;
  color: var(--muted);
  background: #eef2f6;
  border-bottom: 1px solid var(--line);
  font-size: 12px;
}

.panel-status-groups {
  background: var(--line);
}

.panel-status-group {
  background: #f8fafc;
  border-bottom: 1px solid var(--line);
}

.panel-status-group:last-child {
  border-bottom: 0;
}

.panel-status-group-title {
  padding: 7px 10px;
  color: var(--muted);
  background: #eef2f6;
  font-size: 12px;
  font-weight: 700;
}

.panel-status-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1px;
  background: var(--line);
}

.panel-status-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas: "label value" "raw raw";
  gap: 4px 12px;
  min-width: 0;
  padding: 9px 10px;
  align-items: baseline;
  background: #ffffff;
  font-size: 13px;
}

.panel-status-label {
  grid-area: label;
  min-width: 0;
  color: var(--muted);
  overflow-wrap: anywhere;
}

.panel-status-value {
  grid-area: value;
  min-width: 0;
  color: var(--primary-dark);
  text-align: right;
  overflow-wrap: anywhere;
}

.panel-status-raw {
  grid-area: raw;
  min-width: 0;
  color: var(--muted);
  font-family: Consolas, Monaco, monospace;
  font-size: 12px;
  overflow-wrap: anywhere;
}

@media (max-width: 560px) {
  .panel-status-grid {
    grid-template-columns: 1fr;
  }
}

pre,
.state-list,
.event-log {
  width: 100%;
  min-height: 120px;
  max-height: 360px;
  overflow: auto;
  margin: 0;
  padding: 12px;
  background: #0f172a;
  color: #dbeafe;
  border-radius: 6px;
  font-family: Consolas, Monaco, monospace;
  font-size: 12px;
  white-space: pre-wrap;
}

.state-card {
  padding: 10px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.state-card:last-child {
  border-bottom: 0;
}

.event {
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.event.warning {
  padding-left: 8px;
  border-left: 3px solid #f59e0b;
}

.event.warning strong {
  color: #fbbf24;
}

.event strong {
  color: #bfdbfe;
}

.ok {
  color: var(--accent);
}

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

@media (max-width: 980px) {
  .layout {
    grid-template-columns: repeat(2, minmax(240px, 1fr));
  }

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

@media (max-width: 680px) {
  .topbar {
    position: static;
    display: grid;
  }

  .toast {
    top: 12px;
    right: 12px;
    left: 12px;
    max-width: none;
  }

  .gateway-box {
    min-width: 0;
  }

  .layout {
    grid-template-columns: 1fr;
    padding: 12px;
  }

  .wide {
    grid-column: span 1;
  }

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