.ebook-hero { color: var(--white); background: radial-gradient(ellipse at 12% 95%, var(--blue), var(--blue-deep) 66%); }
.ebook-layout { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, .82fr); align-items: center; gap: clamp(32px, 7vw, 100px); padding-block: var(--s8); }
.ebook-tag { color: #d6e8ff; margin-bottom: var(--s4); }
.ebook-intro h1 { color: var(--white); font-size: clamp(2.3rem, 4.3vw, 4rem); letter-spacing: -.055em; line-height: 1.08; }
.ebook-intro h1 span { color: #b9d8ff; }
.ebook-lead { max-width: 54ch; color: #e6edf8; margin-block: var(--s5); }
.ebook-book { display: flex; gap: var(--s5); align-items: center; margin: var(--s6) 0 0; }
.ebook-book img { width: clamp(92px, 12vw, 148px); height: auto; border-radius: 5px; box-shadow: 0 12px 28px #101f3b80; }
.ebook-book figcaption { display: grid; gap: 4px; color: #e6edf8; font-size: .9rem; }
.ebook-book strong { color: var(--white); font-size: 1.3rem; }
.ebook-card { background: var(--white); color: var(--blue-deep); padding: clamp(22px, 4vw, 40px); border-radius: 14px; box-shadow: 0 18px 54px #101f3b50; scroll-margin-top: 125px; }
.ebook-card .section-label { margin-bottom: var(--s2); }
.ebook-card h2 { font-size: clamp(1.65rem, 2.6vw, 2.3rem); }
.ebook-form-intro { color: var(--muted); margin: var(--s2) 0 var(--s5); }
.ebook-card label { display: block; font-weight: 600; font-size: .92rem; margin-bottom: 5px; }
.ebook-card input { display: block; width: 100%; min-height: 48px; margin-bottom: var(--s4); padding: 10px 12px; font: inherit; color: var(--blue-deep); background: var(--paper); border: 1px solid #a9b7c9; border-radius: 6px; }
.ebook-card input:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }
.ebook-card small { display: block; margin-top: -9px; color: var(--muted); }
.ebook-submit { width: 100%; justify-content: center; gap: var(--s3); margin-top: var(--s4); text-align: center; }
.ebook-card button.ebook-submit { border: 0; cursor: pointer; font: inherit; font-weight: 600; }
.ebook-privacy { margin: var(--s3) 0 0; color: var(--muted); font-size: .78rem; line-height: 1.45; }
.ebook-card .text-link { margin-top: var(--s3); }
.ebook-topics-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--s5); margin-block: var(--s6) var(--s4); }
.ebook-topics-grid article { border-top: 1px solid var(--line); padding-top: var(--s4); }
.ebook-topics-grid article > span { color: var(--blue); font-weight: 600; }
.ebook-topics-grid h3 { margin-block: var(--s2); }
.ebook-topics-grid p { color: var(--muted); }
.ebook-author { background: var(--blue-pale); border-top: 1px solid var(--line); }
.ebook-author-layout { display: grid; max-width: 940px; grid-template-columns: minmax(0, 250px) minmax(0, 1fr); gap: clamp(24px, 6vw, 72px); align-items: center; }
.ebook-author-portrait { display: block; width: 100%; height: auto; border-radius: var(--radius); }
.ebook-author-copy .section-label { margin-bottom: var(--s2); }
.ebook-author-copy .ebook-author-role { color: var(--blue); font-weight: 600; margin-block: var(--s2) var(--s4); }
.ebook-author-copy p + p { margin-top: var(--s3); }
.ebook-author-copy .text-link { margin-top: var(--s4); }
@media (max-width: 767px) {
  .ebook-layout, .ebook-topics-grid { grid-template-columns: 1fr; }
  .ebook-author-layout { grid-template-columns: 1fr; max-width: 540px; justify-items: center; text-align: center; }
  .ebook-author-portrait { width: min(100%, 190px); }
  .ebook-layout { padding-block: var(--s6) var(--s7); }
  .ebook-book { margin-top: var(--s4); }
}