:root {
  --bg: #f3f6fb;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --line: #d9e0ea;
  --primary: #0b57d0;
  --primary-hover: #0848ad;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Segoe UI", sans-serif;
}

.page {
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  padding: 16px 14px 28px;
}

.hero-card,
.guide-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px;
  box-shadow: 0 8px 24px rgba(17, 24, 39, 0.04);
}

.guide-card {
  margin-top: 14px;
}

.tag {
  display: inline-block;
  margin: 0 0 10px;
  padding: 3px 10px;
  border-radius: 999px;
  background: #e8f0ff;
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
}

h1 {
  margin: 0;
  font-size: 24px;
  line-height: 1.25;
}

.sub {
  margin: 10px 0 14px;
  color: var(--muted);
  line-height: 1.45;
  font-size: 14px;
}

.url-box {
  border: 1px dashed #b8c4d8;
  border-radius: 10px;
  background: #f8fbff;
  padding: 10px;
}

.url-label {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 6px;
}

.url-value {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-all;
  font-size: 14px;
  line-height: 1.4;
}

.btn-row {
  display: flex;
  gap: 10px;
  margin-top: 12px;
}

.btn {
  appearance: none;
  border: 0;
  border-radius: 9px;
  padding: 10px 14px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

.btn-primary {
  flex: 1;
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-primary:disabled {
  background: #9ab8ea;
  cursor: not-allowed;
}

.btn-ghost {
  background: #eef3fb;
  color: #27466d;
}

.status {
  min-height: 18px;
  margin: 10px 2px 0;
  font-size: 13px;
  color: #0f766e;
}

.status.error {
  color: #b42318;
}

h2 {
  margin: 0 0 10px;
  font-size: 20px;
}

h3 {
  margin: 16px 0 8px;
  font-size: 16px;
}

ol,
ul {
  margin: 0;
  padding-left: 20px;
  line-height: 1.65;
  font-size: 14px;
}

.example {
  margin: 0;
}

code {
  background: #f4f7fb;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  padding: 2px 6px;
  font-size: 12px;
}