body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: #f4f7fa;
    color: #0D2433;
    line-height: 1.6;
}

/* HERO */
.hero {
    display: flex;
    justify-content: space-between;
    padding: 80px 10%;
    background: linear-gradient(135deg, #0D2433, #2874A6);
    color: white;
}

.hero-content {
    max-width: 50%;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 10px;
}

.hero h2 {
    font-size: 22px;
    margin-bottom: 20px;
    max-width: 90%;
}

.tagline {
    font-size: 16px;
    opacity: .9;
    margin-bottom: 30px;
}

.hero-buttons a {
    padding: 15px 25px;
    margin-right: 10px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: bold;
}

.btn-primary {
    background: #ffcc00;
    color: #0D2433;
}

.btn-secondary {
    background: white;
    color: #1C4966;
}

.hero-image img {
    width: 350px;
    filter: drop-shadow(0px 10px 20px rgba(0,0,0,0.4));
}

/* SECTION TITLES */
section h3 {
    font-size: 32px;
    text-align: center;
    margin-top: 60px;
}

/* TARGET */
.target {
    padding: 40px 12%;
}

.target ul li {
    font-size: 18px;
    margin: 10px 0;
}

/* BENEFITS */
.benefits {
    background: white;
    padding: 60px 10%;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.benefit-item {
    background: #e8f1f8;
    padding: 20px;
    border-radius: 8px;
    border-left: 5px solid #2874A6;
}

/* CHAPTERS */
.chapters {
    padding: 50px 10%;
}

.chapters ol li {
    font-size: 20px;
    margin: 12px 0;
}

.chapters .btn-primary {
    display: inline-block;
    margin-top: 30px;
}

/* AUTHOR */
.author {
    background: white;
    padding: 60px 10%;
}

.author-box {
    display: flex;
    align-items: center;
    gap: 30px;
    margin-top: 20px;
}

.author-img {
    width: 150px;
    border-radius: 100%;
}

/* FOOTER */
footer {
    text-align: center;
    padding: 30px;
    background: #0D2433;
    color: white;
    margin-top: 40px;
}

footer a {
    color: #ffcc00;
}