:root {
  --my-bg: #fafafa;
  --my-card: #fff;
  --my-accent: #d97706;
  --my-accent-hover: #b45309;
  --my-text: #1a1a1a;
  --my-text-2: #666;
  --my-border: #eee;
  --my-radius: 10px;
  --my-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
  --my-danger: #dc2626;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--my-text);
  background:
    radial-gradient(900px 480px at 12% -8%, rgba(217, 119, 6, 0.12), transparent 55%),
    linear-gradient(180deg, #fffbeb 0%, var(--my-bg) 45%, #f5f5f5 100%);
}

.card {
  width: min(420px, calc(100% - 2rem));
  background: var(--my-card);
  border: 1px solid var(--my-border);
  border-radius: var(--my-radius);
  box-shadow: var(--my-shadow);
  padding: 2rem 1.5rem 1.6rem;
  text-align: center;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 1.25rem;
}

.brand i {
  font-size: 1.75rem;
  color: var(--my-accent);
}

.brand span {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.spinner {
  width: 36px;
  height: 36px;
  margin: 0 auto 1rem;
  border: 3px solid #fde68a;
  border-top-color: var(--my-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.msg {
  margin: 0;
  color: var(--my-text-2);
  font-size: 0.98rem;
  line-height: 1.6;
}

.err {
  display: none;
  margin-top: 1rem;
  padding: 0.75rem 0.9rem;
  border-radius: var(--my-radius);
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: var(--my-danger);
  font-size: 0.9rem;
  text-align: left;
  word-break: break-all;
}

.err.is-show {
  display: block;
}

.retry {
  display: none;
  margin-top: 1rem;
  appearance: none;
  border: none;
  background: var(--my-accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  padding: 0.7rem 1.1rem;
  border-radius: 999px;
  cursor: pointer;
}

.retry.is-show {
  display: inline-block;
}

.retry:hover {
  background: var(--my-accent-hover);
}