* {
margin: 0;
padding: 0;
box-sizing: border-box;
}

body {
background: #f2f4f8;
font-family: 'Times New Roman', 'Georgia', 'Merriweather', 'Palatino', serif;
line-height: 1.55;
color: #1f2d3a;
padding: 2rem 1.5rem;
}

/* Main container — elegant publisher card style (Springer/Wiley/Elsevier) */
.book-card {
max-width: 1100px;
margin: 0 auto;
background: #ffffff;
border-radius: 4px;
box-shadow: 0 12px 35px rgba(0, 0, 0, 0.08), 0 2px 6px rgba(0, 0, 0, 0.02);
overflow: hidden;
transition: all 0.2s ease;
}

/* Header with subtle academic identity */
.publisher-header {
background: #fff;
padding: 1.8rem 2.2rem 0.8rem 2.2rem;
border-bottom: 1px solid #e6eef4;
}

.imprint {
font-size: 0.7rem;
text-transform: uppercase;
letter-spacing: 1.2px;
color: #b45f2b;
font-weight: 600;
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
margin-bottom: 0.6rem;
}

h1 {
font-size: 2.1rem;
font-weight: 600;
color: #1a3e50;
letter-spacing: -0.2px;
line-height: 1.25;
margin-bottom: 0.3rem;
font-family: 'Times New Roman', 'Georgia', serif;
}

.byline {
font-size: 0.85rem;
color: #5f7f9c;
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
padding-bottom: 0.8rem;
border-bottom: 1px solid #eef3f8;
}

/* Two column layout (professional) */
.overview-grid {
display: flex;
flex-wrap: wrap;
gap: 2.2rem;
padding: 2rem 2.2rem 2rem 2.2rem;
}

.left-panel {
flex: 1;
min-width: 240px;
}

.right-panel {
flex: 2.2;
min-width: 280px;
}

/* Cover / metadata block */
.cover-block {
background: #f9fbfe;
border: 1px solid #e9eff4;
border-radius: 12px;
padding: 1.5rem 1rem;
text-align: center;
margin-bottom: 1.6rem;
box-shadow: 0 1px 2px rgba(0,0,0,0.02);
}

.book-icon {
font-size: 3.5rem;
margin-bottom: 0.3rem;
}

.cover-block p {
font-size: 0.75rem;
color: #3c6e8f;
font-family: monospace;
}

.metadata {
border-top: 1px solid #eef2f7;
padding-top: 1rem;
}

.meta-row {
display: flex;
font-size: 0.8rem;
padding: 0.4rem 0;
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
border-bottom: 1px dashed #edf2f6;
}

.meta-label {
width: 100px;
font-weight: 600;
color: #2b5f7a;
}

.meta-value {
color: #2c4a66;
}

.doi-badge {
background: #f4f7fb;
padding: 0.3rem 0.7rem;
border-radius: 24px;
font-size: 0.7rem;
font-family: monospace;
display: inline-block;
margin-top: 0.6rem;
color: #4b6e8a;
}

/* Right panel content */
.section-divider {
font-size: 0.8rem;
font-weight: 700;
text-transform: uppercase;
letter-spacing: 1px;
color: #b45f2b;
margin: 1.2rem 0 0.8rem 0;
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.section-divider:first-of-type {
margin-top: 0;
}

/* This is the exact required div style — matches the requested class and attributes */
.otQkpb {
font-size: 1.4rem;
font-weight: 600;
color: #1e4660;
margin: 0 0 1rem 0;
line-height: 1.35;
font-family: 'Times New Roman', 'Georgia', serif;
border-left: 4px solid #b45f2b;
padding-left: 1rem;
}

/* main descriptive text */
.description-text {
color: #2c3f4e;
font-size: 0.98rem;
line-height: 1.65;
text-align: justify;
margin-bottom: 1rem;
}

.description-text p {
margin-bottom: 1rem;
}

/* Key features list — elegant bullet */
.feature-list {
list-style: none;
margin: 0.5rem 0 1rem 0;
}

.feature-list li {
padding: 0.45rem 0 0.45rem 1.6rem;
position: relative;
font-size: 0.92rem;
color: #1f4868;
border-bottom: 1px solid #f0f5fa;
}

.feature-list li::before {
content: "•";
position: absolute;
left: 0.4rem;
color: #b45f2b;
font-weight: bold;
font-size: 1.2rem;
}

/* Target audience block — professional style */
.audience-box {
background: #fafcfd;
border-left: 4px solid #b45f2b;
padding: 1rem 1.3rem;
margin: 1.2rem 0 0.5rem 0;
border-radius: 0 14px 14px 0;
font-size: 0.9rem;
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
color: #2c5778;
}

.audience-box strong {
color: #1e4e6c;
font-weight: 700;
}

hr {
margin: 0.8rem 0;
border: 0;
height: 1px;
background: #e7edf3;
}

/* Footer */
.book-footer {
background: #fafcfd;
border-top: 1px solid #eef2f7;
padding: 0.9rem 2rem;
font-size: 0.7rem;
color: #6f8aa3;
text-align: center;
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

@media (max-width: 750px) {
body {
padding: 1rem;
}
.overview-grid {
flex-direction: column;
padding: 1.5rem;
}
h1 {
font-size: 1.6rem;
}
.otQkpb {
font-size: 1.25rem;
}
}