.reader-header-inner { min-height: 72px; }
.reader-back { color: var(--ink); font-size: .84rem; font-weight: 800; text-decoration: none; }
.reader-back:hover { text-decoration: underline; text-underline-offset: 4px; }
.reader-intro { padding: clamp(38px, 6vw, 72px) 0 42px; background: #f8fbfd; border-bottom: 1px solid var(--line); }
.reader-intro-inner { max-width: 960px; }
.reader-intro h1 { margin-bottom: 17px; font-size: clamp(2.35rem, 4.5vw, 4.6rem); }
.reader-intro h1 em { color: var(--burgundy); font-style: italic; }
.reader-subtitle { max-width: 740px; color: var(--text); font-size: clamp(1rem, 1.65vw, 1.17rem); }
.reader-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.reader-section { padding: 34px 0 54px; }
.reader-frame { height: min(82dvh, 1050px); min-height: 590px; overflow: hidden; background: var(--white); border: 1px solid var(--line); border-radius: 16px; box-shadow: var(--shadow); }
.reader-frame iframe { display: block; width: 100%; height: 100%; border: 0; }
.reader-help { margin: 15px 0 0; color: var(--muted); font-size: .85rem; }
.reader-help a { color: var(--burgundy); font-weight: 800; text-underline-offset: 3px; }
.reader-end { padding: 55px 0; background: var(--sand); }
.reader-end-inner { display: flex; align-items: center; justify-content: space-between; gap: 25px; }
.reader-end h2 { margin-bottom: 10px; font-size: clamp(2rem, 3.5vw, 3.2rem); }
.reader-end p:last-child { margin-bottom: 0; }
.reader-footer { padding: 24px 0; background: var(--ink-strong); color: var(--white); }
.reader-footer .container { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 14px 24px; font-size: .78rem; }
.reader-footer a { color: inherit; text-underline-offset: 3px; }
@media (max-width: 700px) {
  .reader-intro { padding-bottom: 31px; }
  .reader-actions .button { width: 100%; }
  .reader-section { padding: 16px 0 35px; }
  .reader-section .container { width: calc(100% - 20px); }
  .reader-frame { height: 74dvh; min-height: 470px; border-radius: 9px; }
  .reader-end-inner { display: block; }
  .reader-end .button { margin-top: 22px; }
}