body {
  background: #000;
  color: #fff;
  font-family: Arial, sans-serif;
  text-align: center;
  padding: 70px 0;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 18px;
}

/* Head */
.header h1 {
  font-size: 44px;
  margin: 0 0 8px 0;
}

.tagline {
  margin: 0 0 14px 0;
  opacity: 0.85;
  font-weight: bold;
}

.intro {
  max-width: 700px;
  margin: 0 auto 18px auto;
  line-height: 1.6;
  opacity: 0.9;
}

.cta-row {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 14px;
}

/* Sections */
h2 {
  margin: 60px 0 10px 0;
  font-size: 28px;
}

.section-gap {
  margin-top: 70px;
}

.muted {
  opacity: 0.8;
  line-height: 1.6;
}

.tiny {
  font-size: 13px;
}

/* Panel */
.panel {
  border: 1px solid rgba(255,255,255,0.35);
  border-radius: 14px;
  padding: 18px;
  margin-top: 24px;
  background: rgba(255,255,255,0.03);
}

.bullets {
  text-align: left;
  max-width: 650px;
  margin: 14px auto 0 auto;
  line-height: 1.6;
  opacity: 0.9;
}

/* Buttons */
.button {
  display: inline-block;
  padding: 12px 18px;
  background: #fff;
  color: #000;
  text-decoration: none;
  border-radius: 8px;
  font-weight: bold;
  border: none;
  cursor: pointer;
}

.button-ghost {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255,255,255,0.55);
}

/* Books grid */
.books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin-top: 18px;
}

/* Book card */
.book-card {
  border: 1px solid rgba(255,255,255,0.45);
  border-radius: 14px;
  overflow: hidden;
  background: rgba(255,255,255,0.02);
  text-align: left;
}

.cover {
  width: 100%;
  height: 360px;
  object-fit: cover;
  display: block;
  background: rgba(255,255,255,0.04);
}

.book-body {
  padding: 14px;
}

.book-body h3 {
  margin: 0 0 8px 0;
  font-size: 18px;
  letter-spacing: 0.2px;
}

.desc {
  margin: 0 0 14px 0;
  line-height: 1.55;
  opacity: 0.88;
}

/* Email form */
.signup {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 14px;
}

.signup input {
  padding: 12px;
  width: 260px;
  border-radius: 8px;
  border: none;
}

.footer {
  margin-top: 60px;
}