.world-toolbar {
    position: sticky;
    top: 0;
    z-index: 20;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 20px;
    background: #121517;
    border-bottom: 1px solid #e6b879;
}

.world-toolbar .button {
    font-size: 18px;
    padding: 10px 16px;
    text-align: center;
}

.in-world .page {
    padding-top: 20px;
}

.in-world .catalog-nav a {
    font-size: 18px;
    padding: 10px 16px;
}

@media (max-width: 550px) {
    .world-toolbar { gap: 6px; padding: 8px; }
    .world-toolbar .button { font-size: 15px; padding: 10px; }
}

/* Only the in-world library entrance is a fixed, single-screen menu. */
.world-overview {
    height: 100vh;
    display: grid;
    grid-template-rows: auto minmax(0, 1fr);
    overflow: hidden;
}

.world-overview .page {
    width: 100%;
    height: 100%;
    min-height: 0;
    padding: 12px 3vw 18px;
    display: grid;
    grid-template-rows: auto minmax(0, 1fr);
    gap: 12px;
}

.world-overview .eyebrow,
.world-overview .catalog-nav,
.world-overview .catalog-intro,
.world-overview .site-footer {
    display: none;
}

.world-overview h1 {
    font-size: clamp(26px, 4vh, 40px);
    margin: 0;
}

.world-overview .catalog-hub {
    min-height: 0;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-template-rows: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.world-overview .catalog-tile {
    position: relative;
    justify-content: center;
    padding: clamp(12px, 2vh, 24px);
}

.world-overview .catalog-count {
    position: absolute;
    top: 10px;
    right: 14px;
    font-size: clamp(18px, 3vh, 30px);
    margin: 0;
}

.world-overview .catalog-tile h2 {
    font-size: clamp(22px, 3.8vh, 34px);
    margin: 0 0 6px;
    padding-right: 60px;
}

.world-overview .catalog-tile p {
    margin: 0;
    font-size: clamp(13px, 2.4vh, 18px);
}

.world-overview .catalog-action {
    margin-top: 8px;
    padding-top: 0;
}

@media (max-height: 480px) {
    .world-overview .catalog-tile p { display: none; }
    .world-overview .world-toolbar { padding: 6px 16px; }
    .world-overview .world-toolbar .button { padding: 6px 12px; }
}