.top nav a[aria-current="page"] {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 6px;
}
.guide-hero {
  padding: clamp(36px, 6vw, 72px) clamp(16px, 5vw, 64px) clamp(40px, 6vw, 72px);
  background: var(--night);
  color: #fff;
}
.guide-hero h1 {
  margin: 0 0 12px;
  font-size: clamp(38px, 5.4vw, 60px);
  line-height: 1.15;
  letter-spacing: -0.02em;
}
.guide-hero p {
  max-width: 34em;
  margin: 0;
  font-size: 20px;
  color: #d9d4ec;
}

/* Contents stay beside the text on wide screens so readers can jump around. */
.guide {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 56px;
  max-width: 1160px;
  margin: 0 auto;
  padding: 56px clamp(16px, 5vw, 48px) 0;
}
.toc {
  position: sticky;
  top: 24px;
  align-self: start;
  max-height: calc(100vh - 48px);
  overflow-y: auto;
  font-size: 16px;
}
.toc b {
  display: block;
  margin-bottom: 8px;
  font-size: 18px;
}
.toc ol {
  margin: 0;
  padding-left: 1.6em;
  color: var(--mist);
}
.toc li {
  margin-bottom: 6px;
}
.toc a {
  text-decoration: none;
}
.toc a:hover {
  color: var(--violet-deep);
  text-decoration: underline;
}

.content {
  max-width: 760px;
  min-width: 0;
}
.content section {
  padding-bottom: 56px;
  margin-bottom: 56px;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 24px;
}
.content section:last-child {
  border-bottom: 0;
}
.content h2 {
  margin-bottom: 18px;
}
.content h3 {
  margin: 0 0 8px;
  font-size: 21px;
}
.content p,
.content li,
.content dd {
  font-size: 18px;
}
.content ol,
.content ul {
  padding-left: 1.4em;
}
.content li {
  margin-bottom: 8px;
}
.content a {
  color: var(--violet-deep);
}
kbd {
  padding: 1px 7px;
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.85em;
  background: #fff;
}
figure {
  margin: 24px 0;
}
figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 14px;
  border: 1px solid var(--line);
  box-shadow: 0 10px 30px rgba(37, 37, 59, 0.12);
}
figure.narrow img {
  max-width: 320px;
}
figcaption {
  margin-top: 10px;
  font-size: 16px;
  color: var(--mist);
}
.tip {
  padding: 16px 20px;
  border-left: 4px solid var(--violet);
  border-radius: 0 12px 12px 0;
  background: var(--lavender);
}
.two {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
}
.parts {
  margin: 0;
}
.parts div {
  display: grid;
  grid-template-columns: 90px minmax(0, 1fr);
  gap: 16px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}
.parts dt {
  font-weight: 700;
  font-size: 18px;
  color: var(--violet-deep);
}
.parts dd {
  margin: 0;
}
.content details {
  border-top: 1px solid var(--line);
  padding: 16px 0;
}
.content summary {
  cursor: pointer;
  font-size: 19px;
  font-weight: 600;
}
.content details p {
  margin: 10px 0 0;
}

@media (max-width: 900px) {
  .guide {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .toc {
    position: static;
    max-height: none;
    padding: 18px 20px;
    border-radius: 14px;
    background: var(--lavender);
  }
  .two {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}
@media (max-width: 560px) {
  .parts div {
    grid-template-columns: 1fr;
    gap: 4px;
  }
  .content p,
  .content li,
  .content dd {
    font-size: 17px;
  }
}