.guide-header {
  position: sticky;
  z-index: 10;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  padding: 12px clamp(18px, 4vw, 48px);
  border-bottom: 1px solid var(--line);
  background: rgb(8 17 15 / 92%);
  backdrop-filter: blur(18px);
}

.guide-brand,
.guide-header nav a {
  color: inherit;
  font-size: 0.82rem;
  font-weight: 700;
  text-decoration: none;
}

.guide-header nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  color: var(--muted);
}

.guide-shell {
  width: min(980px, calc(100% - 40px));
  margin: 0 auto;
  padding: clamp(48px, 8vw, 96px) 0 72px;
}

.guide-hero {
  max-width: 820px;
  margin-bottom: clamp(64px, 10vw, 112px);
}

.guide-hero h1 {
  margin-bottom: 24px;
  font-size: clamp(2.8rem, 8vw, 6.4rem);
  letter-spacing: -0.07em;
  line-height: 0.98;
}

.guide-hero > p:last-child,
.guide-copy {
  color: #c8d9d3;
  line-height: 1.8;
}

.guide-hero > p:last-child {
  max-width: 720px;
  font-size: clamp(1rem, 2vw, 1.2rem);
}

.guide-section {
  display: grid;
  grid-template-columns: 70px minmax(0, 1fr);
  gap: clamp(18px, 4vw, 42px);
  padding: clamp(36px, 7vw, 68px) 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 72px;
}

.section-number {
  color: var(--mint);
  font-size: 0.75rem;
  font-weight: 760;
  letter-spacing: 0.12em;
}

.guide-section h2 {
  margin-bottom: 28px;
  font-size: clamp(1.8rem, 4vw, 3rem);
  letter-spacing: -0.05em;
}

.guide-steps {
  display: grid;
  gap: 14px;
  margin: 0;
  padding-left: 1.35rem;
  color: #c8d9d3;
  line-height: 1.75;
}

.guide-steps li {
  padding-left: 8px;
}

.guide-steps a,
.callout a {
  color: var(--mint);
}

code,
kbd {
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--text);
  background: rgb(255 255 255 / 5%);
  font-family: "Cascadia Code", Consolas, monospace;
}

code {
  padding: 0.12em 0.4em;
}

kbd {
  padding: 2px 6px;
  box-shadow: 0 2px 0 var(--line);
  font-size: 0.78rem;
}

.callout {
  margin-top: 26px;
  padding: 18px 20px;
  border-left: 3px solid var(--cyan);
  border-radius: 0 12px 12px 0;
  color: var(--muted);
  background: rgb(88 199 232 / 7%);
  line-height: 1.7;
}

.callout--important {
  border-color: var(--amber);
  background: rgb(255 197 110 / 7%);
}

.callout strong {
  color: var(--text);
}

.limit-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 14px;
}

.limit-grid div {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgb(255 255 255 / 2%);
}

.limit-grid strong,
.limit-grid span {
  display: block;
}

.limit-grid strong {
  color: var(--mint);
  font-size: 1.2rem;
}

.limit-grid span {
  margin-top: 5px;
  color: var(--muted);
  font-size: 0.78rem;
}

.guide-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 14px;
}

.guide-table-wrap table {
  width: 100%;
  border-collapse: collapse;
  color: #c8d9d3;
  font-size: 0.88rem;
}

.guide-table-wrap th,
.guide-table-wrap td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.guide-table-wrap th {
  color: var(--text);
  background: rgb(255 255 255 / 4%);
}

.guide-table-wrap tr:last-child td {
  border-bottom: 0;
}

.result-list {
  display: grid;
  gap: 10px;
  margin: 0;
}

.result-list div {
  display: grid;
  grid-template-columns: minmax(150px, 0.4fr) minmax(0, 1fr);
  gap: 18px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.result-list dt {
  color: var(--mint);
  font-family: "Cascadia Code", Consolas, monospace;
  font-size: 0.86rem;
}

.result-list dd {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

details {
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

summary {
  cursor: pointer;
  font-weight: 700;
}

details p {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.7;
}

.reference-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  padding-top: 48px;
  border-top: 1px solid var(--line);
}

.reference-grid a {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  text-decoration: none;
}

.reference-grid a:hover,
.reference-grid a:focus-visible {
  border-color: var(--mint);
  outline: none;
}

.reference-grid strong,
.reference-grid span {
  display: block;
}

.reference-grid span {
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.5;
}

@media (max-width: 720px) {
  .guide-header nav {
    display: none;
  }

  .guide-section {
    grid-template-columns: 1fr;
  }

  .limit-grid,
  .reference-grid {
    grid-template-columns: 1fr;
  }

  .result-list div {
    grid-template-columns: 1fr;
    gap: 6px;
  }
}