:root {
  color-scheme: light;
  --bg: #f6f7f9;
  --panel: #ffffff;
  --ink: #17202a;
  --muted: #667085;
  --line: #d8dee8;
  --blue: #2668d8;
  --blue-dark: #1f55af;
  --green: #138a63;
  --amber: #9a6700;
  --shadow: 0 18px 48px rgba(22, 34, 51, 0.08);
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family:
    "Microsoft YaHei",
    "PingFang SC",
    "Segoe UI",
    system-ui,
    sans-serif;
}

button,
textarea,
input {
  font: inherit;
}

button {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  min-height: 38px;
  padding: 0 14px;
  transition:
    border-color 0.15s ease,
    background 0.15s ease,
    transform 0.15s ease;
}

button:hover {
  border-color: #9cadc4;
  background: #f9fbfd;
}

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

.app-shell {
  width: min(1440px, 100%);
  min-height: 100vh;
  margin: 0 auto;
  padding: 24px;
}

.topbar {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
}

.topbar h1 {
  margin: 0;
  font-size: 30px;
  font-weight: 760;
  letter-spacing: 0;
}

.topbar p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.status {
  min-width: 108px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--muted);
  padding: 8px 13px;
  text-align: center;
  font-size: 13px;
  white-space: nowrap;
}

.status.ok {
  border-color: rgba(19, 138, 99, 0.35);
  color: var(--green);
}

.status.warn {
  border-color: rgba(154, 103, 0, 0.35);
  color: var(--amber);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 156px minmax(0, 1fr);
  gap: 16px;
  align-items: stretch;
}

.pane,
.control-rail {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.pane {
  display: grid;
  grid-template-rows: auto minmax(560px, calc(100vh - 142px));
  min-width: 0;
}

.pane-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 58px;
  padding: 10px 12px 10px 16px;
  border-bottom: 1px solid var(--line);
}

.pane-head label {
  font-weight: 700;
  min-width: max-content;
}

.actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

textarea {
  width: 100%;
  height: 100%;
  min-height: 440px;
  resize: none;
  border: 0;
  outline: none;
  padding: 16px;
  color: var(--ink);
  line-height: 1.58;
  font-family:
    "Cascadia Mono",
    "Consolas",
    "Microsoft YaHei",
    monospace;
  font-size: 14px;
  background: transparent;
}

textarea::placeholder {
  color: #9aa4b2;
}

.control-rail {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 14px;
}

.primary {
  width: 100%;
  min-height: 44px;
  border-color: var(--blue);
  background: var(--blue);
  color: #fff;
  font-weight: 700;
}

.primary:hover {
  border-color: var(--blue-dark);
  background: var(--blue-dark);
}

.switch {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  color: #344054;
  font-size: 14px;
}

.switch input {
  width: 17px;
  height: 17px;
  accent-color: var(--blue);
}

.metrics {
  display: grid;
  gap: 8px;
  margin-top: auto;
}

.metrics div {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: baseline;
  border-top: 1px solid var(--line);
  padding-top: 10px;
}

.metrics strong {
  font-size: 25px;
  line-height: 1;
}

.metrics span {
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 980px) {
  .app-shell {
    padding: 16px;
  }

  .topbar {
    align-items: start;
    flex-direction: column;
  }

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

  .control-rail {
    display: grid;
    grid-template-columns: minmax(120px, 1fr) repeat(2, auto) minmax(220px, 1fr);
    align-items: center;
  }

  .metrics {
    grid-template-columns: repeat(3, 1fr);
    margin-top: 0;
  }

  .metrics div {
    border-top: 0;
    border-left: 1px solid var(--line);
    padding: 0 0 0 10px;
  }

  .pane {
    grid-template-rows: auto minmax(340px, 48vh);
  }
}

@media (max-width: 640px) {
  .topbar h1 {
    font-size: 24px;
  }

  .pane-head,
  .actions,
  .control-rail {
    align-items: stretch;
  }

  .pane-head {
    flex-direction: column;
  }

  .actions {
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .control-rail {
    grid-template-columns: 1fr;
  }

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