:root {
  --ms-blue: #0067B8;
  --dark: #201F1E;
  --gray: #605E5C;
  --light-bg: #FAF9F8;
  --line: #E1DFDD;
  --red: #C83C28;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--dark);
  background: var(--light-bg);
  line-height: 1.55;
}

header.site-header {
  background: var(--ms-blue);
  color: white;
  padding: 18px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

header.site-header a {
  color: white;
  text-decoration: none;
  font-weight: 700;
  font-size: 18px;
}

header.site-header nav a {
  margin-left: 24px;
  font-weight: 500;
  font-size: 15px;
  opacity: 0.92;
}

header.site-header nav a:hover { opacity: 1; text-decoration: underline; }

main {
  max-width: 820px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

h1 {
  font-size: 30px;
  margin-bottom: 6px;
}

.subtitle {
  color: var(--gray);
  font-size: 16px;
  margin-top: 0;
  margin-bottom: 28px;
}

.guide-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.guide-card {
  display: block;
  background: white;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px 24px;
  margin-bottom: 16px;
  text-decoration: none;
  color: inherit;
  transition: box-shadow 0.15s ease, border-color 0.15s ease;
}

.guide-card:hover {
  box-shadow: 0 2px 10px rgba(0,0,0,0.08);
  border-color: var(--ms-blue);
}

.guide-card h3 {
  margin: 0 0 6px;
  color: var(--ms-blue);
  font-size: 18px;
}

.guide-card p {
  margin: 0;
  color: var(--gray);
  font-size: 14px;
}

.tag {
  display: inline-block;
  background: #EFF6FC;
  color: var(--ms-blue);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 3px 8px;
  border-radius: 4px;
  margin-bottom: 10px;
}

hr.divider {
  border: none;
  border-top: 1px solid var(--line);
  margin: 24px 0;
}

.step h2 {
  font-size: 19px;
  margin-top: 32px;
  margin-bottom: 8px;
}

.step p {
  font-size: 15px;
  margin-bottom: 10px;
}

.step img {
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: 6px;
  display: block;
  margin: 10px 0 4px;
}

.tips {
  background: white;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px 24px;
  margin-top: 20px;
}

.tips h2 { margin-top: 0; font-size: 18px; }

.tips ul {
  margin: 8px 0 0;
  padding-left: 20px;
  font-size: 14px;
  color: var(--gray);
}

.tips li { margin-bottom: 8px; }

.back-link {
  display: inline-block;
  margin-bottom: 20px;
  font-size: 14px;
  color: var(--ms-blue);
  text-decoration: none;
}

.back-link:hover { text-decoration: underline; }

footer.site-footer {
  text-align: center;
  color: var(--gray);
  font-size: 13px;
  padding: 24px;
}