:root {
  color-scheme: light dark;
  --bg: #f6f8fb;
  --card: #ffffff;
  --text: #121826;
  --subtle: #5f6b7a;
  --border: #e5eaf2;
  --accent: #2563eb;
  --ok: #047857;
  --warn: #b45309;
  --radius: 14px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f172a;
    --card: #111827;
    --text: #f3f4f6;
    --subtle: #9ca3af;
    --border: #1f2937;
    --accent: #60a5fa;
    --ok: #34d399;
    --warn: #f59e0b;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.app {
  width: min(760px, 100%);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  overflow: hidden;
}

.header {
  padding: 28px 24px 16px;
  border-bottom: 1px solid var(--border);
}

.toolbar {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.lang-label {
  font-size: 0.85rem;
  color: var(--subtle);
}

#languageSelect {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  border-radius: 8px;
  padding: 4px 8px;
  font-size: 0.85rem;
}

.lang-hint {
  text-align: right;
  color: var(--subtle);
  font-size: 0.8rem;
  margin-bottom: 10px;
}

h1 {
  margin: 0;
  font-size: clamp(1.4rem, 2.4vw, 2rem);
  letter-spacing: 0.2px;
}

.desc {
  margin: 10px 0 0;
  color: var(--subtle);
  font-size: 0.95rem;
  line-height: 1.5;
}

.status {
  margin-top: 10px;
  font-size: 0.9rem;
  color: var(--ok);
  min-height: 1.2rem;
}

.status.warn {
  color: var(--warn);
}

.content {
  padding: 18px 24px 24px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

@media (max-width: 640px) {
  .grid {
    grid-template-columns: 1fr;
  }
}

.item {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  background: color-mix(in srgb, var(--card), var(--bg) 8%);
}

.label {
  margin: 0 0 6px;
  font-size: 0.82rem;
  color: var(--subtle);
  letter-spacing: 0.2px;
}

.value {
  margin: 0;
  font-size: 1rem;
  line-height: 1.35;
  word-break: break-word;
}

.value-line {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.value-line .value {
  flex: 1;
}

.copy-icon-btn {
  min-width: 46px;
  height: 28px;
  padding: 0 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.82rem;
  line-height: 1;
  white-space: nowrap;
}

.ip {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--accent);
}

.actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 14px;
}

button {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  border-radius: 8px;
  padding: 8px 12px;
  cursor: pointer;
  font-size: 0.9rem;
}

button:hover {
  border-color: var(--accent);
  color: var(--accent);
}