:root {
  color-scheme: light;
  --bg: #eef3f0;
  --ink: #17211d;
  --muted: #66736d;
  --panel: #ffffff;
  --line: #d7ded9;
  --green: #1c8c62;
  --red: #d83b35;
  --amber: #d39122;
  --blue: #2f6f9f;
  --shadow: 0 18px 50px rgba(25, 42, 34, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(135deg, rgba(47, 111, 159, 0.11), transparent 32%),
    linear-gradient(315deg, rgba(28, 140, 98, 0.14), transparent 36%),
    var(--bg);
  color: var(--ink);
  font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
}

.shell {
  width: min(1240px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 40px;
}

.topbar,
.panel,
.connection {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.88);
  box-shadow: var(--shadow);
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: center;
  padding: 22px 24px;
  border-radius: 8px;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--green);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
}

h1 {
  font-size: clamp(26px, 4vw, 42px);
}

h2 {
  font-size: 18px;
}

.connection {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 140px;
  padding: 12px 14px;
  border-radius: 8px;
  font-weight: 700;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--red);
}

.dot.online {
  background: var(--green);
}

.status-grid,
.content-grid {
  display: grid;
  gap: 16px;
  margin-top: 16px;
}

.status-grid {
  grid-template-columns: 2fr 1fr;
}

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

.panel {
  border-radius: 8px;
  padding: 18px;
  min-width: 0;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-bottom: 16px;
  color: var(--muted);
}

.panel-head h2 {
  color: var(--ink);
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.metric {
  min-height: 106px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8faf8;
}

.metric span,
.metric em {
  display: block;
  color: var(--muted);
  font-style: normal;
  font-size: 13px;
}

.metric strong {
  display: block;
  margin: 10px 0 8px;
  font-size: 24px;
  line-height: 1.15;
}

.alarm-panel {
  color: #fff;
  background: linear-gradient(135deg, #1f6f50, #1f7c70);
}

.alarm-panel .panel-head,
.alarm-panel .panel-head h2 {
  color: rgba(255, 255, 255, 0.86);
}

.alarm-panel.alert {
  background: linear-gradient(135deg, #a82626, #d39122);
}

.alarm-readout strong {
  display: block;
  font-size: 36px;
  line-height: 1.1;
}

.alarm-readout p {
  margin: 14px 0 0;
  color: rgba(255, 255, 255, 0.86);
}

.list {
  display: grid;
  gap: 10px;
  max-height: 360px;
  overflow: auto;
}

.item {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8faf8;
}

.item strong {
  display: block;
  margin-bottom: 6px;
}

.item small {
  color: var(--muted);
}

.compact .item {
  font-family: Consolas, monospace;
  font-size: 13px;
}

.commands {
  display: grid;
  gap: 12px;
}

.form-row {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr) 82px;
  gap: 10px;
  align-items: center;
}

label {
  color: var(--muted);
}

input,
button {
  height: 38px;
  border-radius: 8px;
  border: 1px solid var(--line);
  font: inherit;
}

input {
  width: 100%;
  padding: 0 10px;
  background: #fff;
}

button {
  cursor: pointer;
  color: #fff;
  background: var(--blue);
  border-color: var(--blue);
  font-weight: 700;
}

pre {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
}

.raw,
#commandResult {
  min-height: 120px;
  padding: 12px;
  border-radius: 8px;
  color: #dce8df;
  background: #17211d;
}

@media (max-width: 860px) {
  .topbar,
  .status-grid,
  .content-grid {
    grid-template-columns: 1fr;
  }

  .topbar {
    display: grid;
  }

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

@media (max-width: 560px) {
  .metric-grid,
  .form-row {
    grid-template-columns: 1fr;
  }
}