.catalog-shell {
    padding: 2.5rem 0 6rem;
    overflow: visible;
}

.catalog-topbar {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    padding-bottom: 1.5rem;
    margin-bottom: 2rem;
    border-bottom: 1px solid rgba(39, 69, 44, 0.12);
}

.catalog-kicker {
    margin: 0;
    color: #234f33;
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.24em;
    text-transform: uppercase;
}

.catalog-title {
    margin: 0.75rem 0 0;
    font-family: "Space Grotesk", sans-serif;
    font-size: clamp(2.2rem, 3.8vw, 3.8rem);
    line-height: 1.05;
    color: #1d2b1f;
    letter-spacing: -0.04em;
}

.catalog-copy {
    max-width: 56rem;
    margin: 1rem 0 0;
    color: #617363;
    font-size: 1.05rem;
    line-height: 1.9;
}

.catalog-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.catalog-chip {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(39, 69, 44, 0.14);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.74);
    padding: 0.7rem 1rem;
    color: #234f33;
    font-size: 0.86rem;
    font-weight: 700;
}

.catalog-layout {
    display: grid;
    gap: 1.5rem;
    align-items: start;
}

.catalog-sidebar-card,
.catalog-section {
    border: 1px solid rgba(39, 69, 44, 0.12);
    border-radius: 28px;
    background: rgba(255, 255, 255, 0.86);
    box-shadow: 0 18px 40px rgba(31, 47, 33, 0.08);
}

.catalog-sidebar-card {
    padding: 1.2rem;
}

.catalog-sidebar-title {
    margin: 0 0 1rem;
    color: #1d2b1f;
    font-family: "Space Grotesk", sans-serif;
    font-size: 1.1rem;
    font-weight: 700;
}

.catalog-nav {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.catalog-nav a {
    display: block;
    border-radius: 18px;
    padding: 0.7rem 0.85rem;
    color: #4b5d50;
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    transition: background-color 180ms ease, color 180ms ease, transform 180ms ease;
}

.catalog-nav a:hover {
    background: rgba(35, 79, 51, 0.07);
    color: #234f33;
    transform: translateX(2px);
}

.catalog-content {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.catalog-section {
    padding: 1.5rem;
    scroll-margin-top: 7rem;
}

.catalog-intro {
    background: linear-gradient(180deg, rgba(255, 250, 240, 0.96), rgba(243, 239, 228, 0.94));
}

.catalog-section h2 {
    margin: 0 0 1rem;
    color: #1d2b1f;
    font-family: "Space Grotesk", sans-serif;
    font-size: clamp(1.6rem, 2.4vw, 2.2rem);
    line-height: 1.1;
    letter-spacing: -0.03em;
}

.catalog-section h3 {
    margin: 1.5rem 0 0.75rem;
    color: #234f33;
    font-family: "Space Grotesk", sans-serif;
    font-size: 1.15rem;
    line-height: 1.3;
}

.catalog-section p,
.catalog-section li {
    color: #4f6154;
    font-size: 1rem;
    line-height: 1.85;
}

.catalog-section p {
    margin: 0 0 1rem;
}

.catalog-section ul,
.catalog-section ol {
    margin: 0.75rem 0 0;
    padding-left: 1.4rem;
}

.catalog-section li + li {
    margin-top: 0.55rem;
}

.catalog-section a {
    color: #234f33;
    font-weight: 700;
    text-decoration: none;
}

.catalog-section a:hover {
    text-decoration: underline;
}

@media (min-width: 1024px) {
    .catalog-layout {
        grid-template-columns: 280px minmax(0, 1fr);
        align-items: start;
    }

    .catalog-sidebar {
        position: sticky;
        top: 7rem;
        align-self: start;
    }

    .catalog-topbar {
        flex-direction: row;
        align-items: end;
        justify-content: space-between;
    }

    .catalog-meta {
        justify-content: flex-end;
    }

    .catalog-section {
        padding: 1.85rem;
    }
}