:root {
  color: #1f2937;
  background: #fff7ed;
  font-family:
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    "Hiragino Sans",
    "Yu Gothic",
    sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: #fff7ed;
  line-height: 1.8;
}

a {
  color: #ea580c;
}

.page {
  max-width: 760px;
  margin: 0 auto;
  padding: 24px 18px 48px;
}

.nav {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
  font-size: 14px;
}

.hero,
.panel,
.cta {
  background: #ffffff;
  border: 1px solid #fed7aa;
  border-radius: 8px;
  box-shadow: 0 1px 2px rgb(17 24 39 / 0.05);
}

.hero {
  padding: 28px 22px;
}

.eyebrow {
  margin: 0 0 8px;
  color: #f97316;
  font-size: 13px;
  font-weight: 700;
}

h1 {
  margin: 0 0 14px;
  color: #111827;
  font-size: clamp(30px, 8vw, 46px);
  line-height: 1.18;
  letter-spacing: 0;
}

.lead {
  margin: 0;
  color: #4b5563;
  font-size: 16px;
}

main {
  display: grid;
  gap: 18px;
  margin-top: 18px;
}

.panel,
.cta {
  padding: 22px;
}

h2 {
  margin: 0 0 10px;
  color: #111827;
  font-size: 22px;
  line-height: 1.35;
  letter-spacing: 0;
}

p,
ul,
ol {
  margin-top: 0;
}

ul,
ol {
  padding-left: 1.3em;
}

.formula {
  display: block;
  margin: 14px 0;
  padding: 14px;
  border-radius: 8px;
  background: #fff7ed;
  color: #9a3412;
  font-weight: 700;
}

.example {
  border-left: 4px solid #fb923c;
  padding-left: 14px;
}

.cta {
  text-align: center;
}

.button {
  display: inline-block;
  min-width: 220px;
  margin-top: 8px;
  padding: 13px 18px;
  border-radius: 8px;
  background: #f97316;
  color: #ffffff;
  font-weight: 800;
  text-decoration: none;
}

.source-list {
  color: #6b7280;
  font-size: 13px;
}

.guide-list {
  display: grid;
  gap: 10px;
  padding-left: 0;
  list-style: none;
}

.guide-list a {
  display: block;
  padding: 12px 14px;
  border: 1px solid #fed7aa;
  border-radius: 8px;
  background: #fff7ed;
  font-weight: 700;
  text-decoration: none;
}

.note {
  color: #6b7280;
  font-size: 13px;
}