.research-handbook {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    align-items: center;
    gap: clamp(2rem, 5vw, 4.5rem);
    margin: 2rem auto 3rem;
    padding-top: 3.5rem;
    padding-bottom: 2rem;
    border-top: 1px solid rgba(110, 76, 30, 0.2);
}

.research-handbook__eyebrow {
    margin-bottom: 1rem;
    color: #355E3B;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.research-handbook h2 {
    margin-bottom: 1.5rem;
    color: #6E4C1E;
    font-family: Georgia, 'Times New Roman', serif;
    font-size: clamp(2rem, 3.2vw, 2.75rem);
    font-weight: 400;
    line-height: 1.2;
}

.research-handbook__rule {
    display: block;
    width: 64px;
    height: 3px;
    margin-bottom: 1.5rem;
    background: #B87333;
}

.research-handbook__description {
    margin: 0;
    color: #3e3e3e;
    font-size: 1.125rem;
    line-height: 1.8;
}

.research-handbook__card {
    padding: 2.5rem 2rem;
    border: 4px solid #B87333;
    border-radius: 16px;
    background: #F5EBD0;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.08);
    text-align: center;
}

.research-handbook__icon {
    margin-bottom: 1.5rem;
    color: #B87333;
    font-size: 3.5rem;
}

.research-handbook h3 {
    margin-bottom: 1rem;
    color: #6E4C1E;
    font-family: Georgia, 'Times New Roman', serif;
    font-size: 1.75rem;
}

.research-handbook__summary {
    margin-bottom: 1rem;
    color: #555;
    line-height: 1.6;
}

.research-handbook__meta {
    margin-bottom: 1.5rem;
    color: #615747;
    font-size: 0.875rem;
}

.research-handbook__meta span {
    margin: 0 0.35rem;
}

.research-handbook__download {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.65rem;
    padding: 0.875rem 1.5rem;
    border-radius: 8px;
    background: #355E3B;
    color: #fff;
    font-weight: 600;
    line-height: 1.5;
    text-decoration: none;
}

.research-handbook__download:hover,
.research-handbook__download:focus {
    background: #27482c;
    color: #fff;
    text-decoration: none;
}

.research-handbook__download:focus-visible {
    outline: 3px solid #6E4C1E;
    outline-offset: 4px;
}

@media (max-width: 767.98px) {
    .research-handbook {
        grid-template-columns: minmax(0, 1fr);
        margin-top: 1rem;
        padding-top: 2.5rem;
    }

    .research-handbook__card {
        padding: 2rem 1.25rem;
    }
}