.rss-shell {
  width: min(1120px, calc(100% - 56px));
  margin: 0 auto;
  padding: clamp(54px, 8vw, 104px) 0 clamp(80px, 10vw, 136px);
}

.rss-hero {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(280px, 0.5fr);
  gap: clamp(40px, 8vw, 130px);
  align-items: end;
  padding-bottom: clamp(56px, 8vw, 96px);
  border-bottom: 2px solid var(--ink);
}

.rss-hero h1,
.rss-subscribe h2,
.rss-guide h2,
.rss-latest h2 {
  margin: 0;
  font-family: "Gowun Batang", serif;
  line-height: 1.18;
  word-break: keep-all;
}

.rss-hero h1 { font-size: clamp(42px, 5.8vw, 78px); }
.rss-hero > p:last-child { margin: 0; color: var(--muted); font-size: 16px; line-height: 1.85; }

.rss-subscribe {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 40px;
  align-items: end;
  padding: clamp(44px, 6vw, 72px) 0;
  border-bottom: 1px solid rgba(23, 18, 14, 0.28);
}

.rss-subscribe h2,
.rss-guide h2,
.rss-latest h2 { font-size: clamp(32px, 4vw, 52px); }
.rss-url { margin: 24px 0 0; }
.rss-url code { display: inline-block; padding: 14px 16px; border: 1px solid rgba(23, 18, 14, 0.24); background: rgba(255, 250, 242, 0.8); color: var(--ink); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 14px; overflow-wrap: anywhere; }
.rss-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; justify-content: flex-end; }
.rss-actions .button { margin: 0; }
.copy-status { flex-basis: 100%; margin: 8px 0 0; color: var(--accent); font-size: 13px; text-align: right; }

.rss-guide {
  display: grid;
  grid-template-columns: 0.56fr 1fr;
  gap: clamp(38px, 9vw, 130px);
  padding: clamp(72px, 10vw, 128px) 0;
  border-bottom: 2px solid var(--ink);
}

.rss-guide ol { display: grid; margin: 0; padding: 0; border-top: 1px solid var(--ink); list-style: none; }
.rss-guide li { display: grid; grid-template-columns: 42px 1fr; gap: 18px; padding: 23px 0; border-bottom: 1px solid rgba(23, 18, 14, 0.28); }
.rss-guide li > span { color: var(--accent); font-size: 12px; font-weight: 800; letter-spacing: 0.12em; }
.rss-guide strong { display: block; font-family: "Gowun Batang", serif; font-size: 22px; }
.rss-guide li p { margin: 6px 0 0; color: var(--muted); font-size: 14px; line-height: 1.7; }

.rss-latest { padding-top: clamp(60px, 8vw, 100px); }
.rss-latest-heading { display: flex; justify-content: space-between; align-items: end; gap: 24px; margin-bottom: 30px; }
.rss-latest-heading .section-kicker { margin-bottom: 14px; }
.rss-latest-heading .text-link { white-space: nowrap; }
.rss-latest ul { margin: 0; padding: 0; border-top: 2px solid var(--ink); list-style: none; }
.rss-latest li { display: grid; grid-template-columns: 120px 1fr; gap: 22px; padding: 20px 0; border-bottom: 1px solid rgba(23, 18, 14, 0.28); }
.rss-latest time { color: var(--accent); font-size: 12px; letter-spacing: 0.1em; }
.rss-latest a { font-family: "Gowun Batang", serif; font-size: 20px; }

@media (max-width: 820px) {
  .rss-shell { width: min(100% - 48px, 640px); }
  .rss-hero, .rss-subscribe, .rss-guide { grid-template-columns: 1fr; gap: 30px; }
  .rss-actions { justify-content: flex-start; }
  .copy-status { text-align: left; }
  .rss-latest-heading { align-items: start; flex-direction: column; }
}

@media (max-width: 560px) {
  .rss-shell { width: min(100% - 40px, 640px); }
  .rss-hero h1 { font-size: 40px; }
  .rss-actions { align-items: stretch; flex-direction: column; }
  .rss-actions .button { width: 100%; }
  .rss-latest li { grid-template-columns: 1fr; gap: 8px; }
}