:root {
  --bg: #000000;
  --bg-soft: #07111d;
  --bg-soft-hover: #0d1d31;
  --text: #f4f1ea;
  --muted: #aeb9c8;
  --line: rgba(138, 173, 220, 0.18);
  --shadow: 0 26px 60px rgba(0, 0, 0, 0.5);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Manrope", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(18, 47, 79, 0.45), transparent 28%),
    radial-gradient(circle at bottom, rgba(8, 22, 38, 0.45), transparent 30%),
    var(--bg);
}

.page-shell {
  width: min(100%, 980px);
  margin: 0 auto;
  padding: 32px 16px 56px;
}

.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 26px;
  text-align: center;
}

.eyebrow {
  margin: 0;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.28em;
  font-size: 0.78rem;
  font-weight: 700;
}

.cover-wrap {
  display: flex;
  justify-content: center;
  width: 100%;
}

.book-cover {
  display: block;
  width: min(100%, 320px);
  border-radius: 18px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.cta-group {
  display: flex;
  justify-content: center;
  gap: 28px;
  width: 100%;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 240px;
  min-height: 58px;
  padding: 0 24px;
  border-radius: 999px;
  background: var(--bg-soft);
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  border: 1px solid var(--line);
  box-shadow: 0 14px 30px rgba(4, 10, 18, 0.5);
  transition:
    transform 180ms ease,
    background-color 180ms ease,
    box-shadow 180ms ease;
}

.cta-button:hover {
  transform: translateY(-2px);
  background: var(--bg-soft-hover);
  box-shadow: 0 18px 36px rgba(4, 10, 18, 0.58);
}

.book-copy {
  width: min(100%, 760px);
  padding: 28px;
  border-radius: 24px;
  background: rgba(7, 12, 20, 0.88);
  border: 1px solid var(--line);
  text-align: left;
  line-height: 1.75;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.28);
}

.book-copy p,
.book-copy ul {
  margin: 0 0 18px;
}

.book-copy h2 {
  margin: 26px 0 12px;
  font-size: 1rem;
  letter-spacing: 0.14em;
  color: var(--text);
}

.intro-question {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text);
}

.influences {
  color: #d8e4f5;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.feature-list {
  padding-left: 22px;
  color: var(--text);
}

.series-name {
  margin-bottom: 0;
  color: var(--muted);
  font-weight: 700;
}

.email-card {
  width: min(100%, 720px);
  padding: 22px;
  border-radius: 24px;
  background: rgba(7, 12, 20, 0.9);
  border: 1px solid var(--line);
}

.email-label {
  display: block;
  margin-bottom: 14px;
  font-weight: 700;
}

.email-row {
  display: flex;
  gap: 12px;
}

.email-row input,
.email-row button {
  min-height: 52px;
  border-radius: 16px;
  font: inherit;
}

.email-row input {
  flex: 1;
  padding: 0 16px;
  border: 1px solid rgba(138, 173, 220, 0.14);
  background: #edf3fb;
  color: #07111d;
}

.email-row button {
  padding: 0 18px;
  border: 1px solid var(--line);
  background: var(--bg-soft);
  color: var(--text);
  font-weight: 700;
  cursor: pointer;
}

.form-message {
  min-height: 1.6em;
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.6;
  font-size: 0.95rem;
}

@media (max-width: 720px) {
  .cta-group {
    flex-direction: column;
    gap: 18px;
  }

  .cta-button {
    width: 100%;
  }

  .email-row {
    flex-direction: column;
  }

  .book-copy {
    padding: 22px;
  }

  .intro-question {
    font-size: 1.18rem;
  }
}