:root {
  --ebook-paper: #fffdfa;
  --ebook-ink: #171a21;
  --ebook-muted: #5d6470;
  --ebook-line: #dfe3ea;
  --ebook-accent: #0f766e;
  --ebook-accent-2: #b7791f;
  --ebook-soft: #f4f7f5;
}

.ebook-cover {
  position: relative;
  overflow: hidden;
  width: 100%;
  max-width: 62rem;
  min-height: min(76vh, 720px);
  margin: 0 auto 1.5rem;
  padding: clamp(2rem, 5vw, 4rem);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border: 1px solid rgba(23, 26, 33, 0.16);
  border-radius: 8px;
  background:
    linear-gradient(90deg, rgba(15, 118, 110, 0.08), transparent 34%),
    linear-gradient(180deg, #fffdfa 0%, #f6f3ed 100%);
  box-shadow: 0 22px 54px rgba(15, 23, 42, 0.10);
  color: var(--ebook-ink);
}

.ebook-cover::before {
  content: "";
  position: absolute;
  inset: 1.1rem auto 1.1rem 1.1rem;
  width: 0.45rem;
  background: linear-gradient(180deg, var(--ebook-accent), var(--ebook-accent-2));
}

.ebook-cover__series {
  margin: 0 0 1rem;
  color: var(--ebook-accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.ebook-cover__title {
  margin: 0;
  max-width: 12em;
  font-size: clamp(2.15rem, 6vw, 4.9rem);
  line-height: 1.08;
  letter-spacing: 0;
  font-weight: 850;
}

.ebook-cover__subtitle {
  max-width: 44rem;
  margin: 1.35rem 0 0;
  color: #384150;
  font-size: clamp(1rem, 2.1vw, 1.22rem);
  line-height: 1.85;
}

.ebook-cover__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1.2rem;
  margin-top: 2.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--ebook-line);
  color: var(--ebook-muted);
  font-size: 0.92rem;
  line-height: 1.6;
}

.ebook-cover__author {
  color: var(--ebook-ink);
  font-weight: 800;
}

.ebook-textbox {
  position: relative;
  border: 1px solid var(--ebook-line);
  border-radius: 8px;
  background: rgba(255, 253, 250, 0.96);
  box-shadow: 0 14px 36px rgba(15, 23, 42, 0.06);
}

.ebook-textbox__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.7rem 0.85rem;
  border-bottom: 1px solid var(--ebook-line);
  background: var(--ebook-soft);
}

.ebook-textbox__label {
  margin: 0;
  color: var(--ebook-muted);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.ebook-edit-btn {
  min-height: 2rem;
  padding: 0 0.72rem;
  border: 1px solid var(--ebook-line);
  border-radius: 6px;
  background: #fff;
  color: var(--ebook-ink);
  font: inherit;
  font-size: 0.78rem;
  font-weight: 800;
  cursor: pointer;
}

.ebook-edit-btn:hover {
  border-color: var(--ebook-accent);
  color: var(--ebook-accent);
}

.ebook-textbox__body {
  padding: 1.2rem 1.35rem;
}

.ebook-visual-block {
  margin: 1.2rem 0 1.6rem;
  border: 1px solid var(--ebook-line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.05);
}

.ebook-modal {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
  background: rgba(15, 23, 42, 0.42);
  z-index: 9999;
}

.ebook-modal.open {
  display: flex;
}

.ebook-modal__panel {
  width: min(760px, 100%);
  max-height: min(820px, calc(100vh - 2rem));
  display: flex;
  flex-direction: column;
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 30px 80px rgba(15, 23, 42, 0.28);
}

.ebook-modal__head,
.ebook-modal__foot {
  padding: 1rem 1.1rem;
  border-bottom: 1px solid var(--ebook-line);
}

.ebook-modal__foot {
  border-top: 1px solid var(--ebook-line);
  border-bottom: 0;
  display: flex;
  justify-content: flex-end;
  gap: 0.55rem;
}

.ebook-modal__head h2 {
  margin: 0;
  font-size: 1rem;
}

.ebook-modal textarea {
  width: 100%;
  min-height: 420px;
  border: 0;
  padding: 1rem 1.1rem;
  resize: vertical;
  font: 0.92rem/1.65 Consolas, "Malgun Gothic", monospace;
}

.ebook-modal button {
  min-height: 2.35rem;
  padding: 0 0.9rem;
  border: 1px solid var(--ebook-line);
  border-radius: 6px;
  background: #fff;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.ebook-modal button[data-primary] {
  border-color: var(--ebook-accent);
  background: var(--ebook-accent);
  color: #fff;
}

@media (max-width: 760px) {
  .ebook-cover {
    min-height: auto;
    padding: 2rem 1.35rem 2rem 1.75rem;
  }

  .ebook-cover::before {
    inset: 1rem auto 1rem 0.8rem;
    width: 0.28rem;
  }

  .ebook-textbox__body {
    padding: 1rem;
  }
}